Report from the LRPIC

By / par Chris Wilson (Chair, LRPIC)
(Cassiopeia – Winter / hivers 2021)

The Long Range Plan Community Recommendations Implementation Committee (LCRIC) has continued to meet weekly over the fall. In October 2021 we added two additional members: Hilding Neilson from the University of Toronto and Laurie Rousseau-Nepton from CFHT.

The main activity of LCRIC in the past 3 months has been organizing and holding an on-line webinar on “Building Indigenous inclusion in Canadian astronomy in the next decade” on November 10, 2021. For the benefit of members who were not able to attend, or who were able to attend but wish to review the discussion, we provide a description of the questions and answers in a companion article in this issue. Additional LCRIC activities in the past 3 months include:

  1. Planning for 3 webinars focused on specific Indigenous-facing recommendations from LRP2020. The planned topics for these webinars are (a) Including Indigenous Voices in Astronomy Education; (b) improving inclusion in Canadian astronomy, for both Indigenous and other racialized members; (c) land and consent, likely focusing on the specific topic of the SKA. The LCRIC has fairly detailed plans for these webinars, and is working to finalize the set of panelists for the first one. We were hoping to hold these webinars in fall 2021, but clearly it will now be winter 2022. The goal is to hold one webinar each month in the first quarter of 2022.
  2. A meeting with 3 representatives from CFHT in October to inform them of LCRIC’s plans and so that LCRIC could learn about current issues and relevant activities at CFHT and to some extent in Hawai`i more broadly.
  3. A meeting with the CASCA Education and Public Outreach committee in November to discuss their plans for the Westar lectureship and other EPO-facing recommendations of LRP2020.
  4. A meeting with the CASCA Postdoc Committee in November to discuss their priorities for the postdoc-facing recommendations of LRP2020.
  5. Writing a Confidentiality Agreement to govern LCRIC interactions, which has been signed by each committee member.
  6. Writing a Code of Conduct for LCRIC.

Over the next 3 months, the LCRIC plans to organize and host the 3 webinars described in item (1) above. A second major activity will be continuing our discussion of the key LRP2020 recommendation on land and consent (recommendation #1), with the goal of having some initial ideas that can be presented to the CASCA membership at the May 2022 AGM. We will also be meeting with additional CASCA committees, such as the Sustainability Committee, to discuss LRP2020 recommendations in their area of interest in the coming months. Finally, we will begin working on an implementation timeline for the LRP2020 societal recommendations.

The LCRIC recognizes that transparency and consultation are very important as our community moves forward to implement the recommendations of the LRP. We will be seeking input from a diversity of perspectives, recognizing that astronomy and astronomers exist with a broader societal context. We welcome feedback and comments at any time, via the Public Discussion page or by email to one of the LCRIC members. Communications will be kept confidential if requested.

Building Indigenous Inclusion in Canadian Astronomy in the Next Decade

The on-line webinar on “Building Indigenous inclusion in Canadian astronomy in the next decade” was held on November 10, 2021. The webinar featured 4 panelists: Rob Thacker (CASCA), Luc Simard (HAA-NRC), Kim Venn (ACURA), and Norm Murray (CITA). (The CITA Director Juna Kollmeier was unable to attend because of a conflict with a previously scheduled SDSS-V review.) The moderator was Hilding Neilson and Chris Wilson acted as an administrative chair. Questions for the panelists were prepared in advance by LCRIC members and the first two questions were shared with the panelists in advance of the webinar. Questions were also solicited from the CASCA membership using Slido, both in advance and during the webinar. Approximately 150 people attended the webinar. Following the panel, LCRIC invited the panelists to submit a written summary of key bullet points from the webinar discussion. CASCA Acting President Rob Thacker provided his thoughts on questions 1 and 2, a subset of which is quoted verbatim here.

For the benefit of members who were not able to attend, or who were able to attend but wish to review the discussion, we provide a description of the questions and answers here. Each panelist gave a combined response to Questions 1 and 2 at the beginning of the webinar; for these two questions, the CITA response was written by Juna Kollmeier and read by Norm Murray. To allow for more questions to be asked, the later questions were sometimes posed only to a subset of the panelists. Excepting the direct quotation for Questions 1 and 2, the following is a summary of panelists’ remarks written by Chris Wilson and reviewed by LCRIC.

Questions 1 and 2: In your personal opinion, what would Indigenous inclusion look like for your organization? How does your organization specifically benefit from ongoing [effects of] colonization?

Rob Thacker: In my own experience highlighting the importance of a personal commitment to inclusion, and ultimately respect, is perhaps the most impactful thing you can do – many other actions flow from that, not least of which is a true understanding of the impact of ‘gatekeeping’. That said, such a commitment is easily said or thought, but not easily done.

We can also learn better approaches to relating and interacting with others. Relational practice has moved from health care to general education (although it is taking time to be fully adopted therein) and presents many important approaches to engaging, listening, shared decision-making and accountability. As a process for building inclusion, especially with Indigenous communities, the fundamental point of the approach is to achieve solutions of benefit to all.

I also want to highlight that judgment without understanding, especially around Indigenous Knowledges, is disrespectful and damaging. I also acknowledge my past failures here. More recently I have come to learn that the verb emphasis of many Indigenous languages creates a profoundly different way of viewing the world, which has been generalized as a perspective of processes rather than objects. Because much of my public engagement as a scientist highlights science as a process of investigation, something beyond a collection of knowledge, I have found these perspectives highly valuable. There is clearly a lot of room for thought and discussion about how we do science.

While Indigenous inclusion is important, in the context of Indigenization it might be considered the minimum bar. If we measure change solely in terms of statistics we miss culture, and that is where the biggest changes are needed to truly address reconciliation, or ‘Reconciliation Indigenization’ as it has been called. Extending research and learning beyond Eurocentric thinking is needed to do this, but since universities are places of learning such expansion of boundaries should be a valued endeavour.

Lastly, it is important to consider how our field has inherently benefited from colonialism. The lens of colonialism tends to focus most obviously on land, as have many of our community discussions in astronomy, but “Big Astronomy” exists within the international scientific community. That has been made possible by education systems that centre western epistemology and thus inevitably contribute to Indigenous erasure. In Canada the Residential Schools system took that to the level of cultural genocide.

Juna Kollmeier (read by Norm Murray): What is important is to work to ensure that people are not excluded from any of our activities at CITA, such as training, workshops, and outreach. There are many routes to losing individuals from STEM training, both implicit and explicit. A particularly important factor is high poverty rates in Indigenous communities, with 40% of Indigenous children living in poverty. CITA regards the education of rural and poor children, specifically in adequate mathematical foundations, to be the largest barrier to Indigenous inclusion in theoretical astrophysics. CITA plans, in consultation with Indigenous scholars and leaders, to work on culturally sensitive, accessible activities at the entrance to the STEM pipeline to improve Indigenous inclusion in STEM careers. Regarding the second question, all publicly funded institutions benefit from the colonial legacy of the crown. CITA strives for a sustainable and just future as we collectively confront and heal from the atrocities of the past.

Kim Venn: ACURA takes decolonization and reconciliation extremely seriously. This is the most important thing in science and engineering right now. ACURA represents 20 universities with enormous resources and ACURA is working to collect resources and best practices to share with the community. ACURA’s goal is to be able to share this list of resources by the end of 2022. One example is the University of Manitoba Wawatay program for support for Indigenous students in science, which is really exemplary. At the University of Alberta and the University of Calgary, there is an Indigenous STEAM effort, where A refers to areas like Art, Architecture, Agriculture etc. where Indigenous peoples have demonstrated innovation and success already, and bringing that into the science curriculum.

Luc Simard: It starts with recognizing that we need help. This very important point was made in the LRP2020 White Paper (“Indigenizing Canadian Astronomy”). It’s about creating spaces (in the workforce, the people; the sites) that can go beyond astronomy, for example, activities on the site of the observatory involving wildfire management, the protection and propagation of species that are important to Indigenous communities for food and medicine, for example. It can be as simple as having Indigenous schools coming and holding nature classes on the sites. Creating Indigenous and Western signs, Indigenous knowledge in outreach activities, and in the research that we do ourselves. We need to listen and learn from the elders of Indigenous communities to be considerate of the feelings, the interests, and the needs of Indigenous people. We are relying on the Indigenous communities to tell us what matters to them most and where we can start. One thing that I heard recently is that it is time go from Reconciliation to ReconciliAction. This is how we will build trust and understanding through long-term relationships.

In terms of the second question, the lands in Penticton and Victoria are what allow world class research in astronomy to take place. NRC-HAA is seeking to establish and maintain long-term relationships with the local Indigenous communities, to listen and learn with the full respect and care that these lands deserve. The Canadian astronomical community also benefits from our international partnerships that operate telescopes in Hawai`i and Chile and those places are also highly significant.

Question 3: What are the goals of your institution regarding indigenous inclusion for the next 5 years? How do you see these goals in relation to the Calls to Action of the TRC? What are your strategies? and How do you define success?

Rob Thacker: From CASCA’s perspective, we are prioritizing recommendation #1 in the LRP, on developing a set of guidelines for how we approach development of facilities and all the relationships around Indigenous lands and Indigenous communities. In terms of the bigger picture, as CASCA President, I have made the decision to establish a President’s Advisory Circle for CASCA. I have learned so much from being allowed to be part of circles with elders, and I felt providing this as a gift to the CASCA President is something that is very important to understanding these issues at the top level. We can’t silo Indigenous aspects into a single committee: understanding our relationships with Indigenous communities requires effort from all of us. CASCA is also working to improve and expand the Westar lectureship program. Finally, we need to come up with an implementation plan with timelines for various recommendations and activities.

Luc Simard: It’s been made very clear to us that trust must be earned through concrete actions. For example, we are discussing how restore the identity of the site in Victoria via W̱SÁNEĆ names and W̱SÁNEĆ teachings in public outreach activities. We had the honour to host elders a couple of weeks ago for discussions. The hope is that soon, as you walk around the site, you will see the Indigenous identity shining through, through these different actions. We are also looking at training opportunities for students and other members of the community; there is a great diversity of training opportunities.

Norm Murray: At CITA, we need to do more homework on talking with Indigenous groups, learning what they are looking for, what they are interested in. We know what our expertise is, we don’t know what their needs or interests are. We will be trying to reach out to people across Canada from Indigenous communities to establish relationships and start conversations, because CITA is a national organization.

Question 4: How does the concept of consent from Indigenous communities/Nations come into play with the interest of astronomers for facilities, instrumentation, etc.? Historically, how has your organization attempted to seek consent and/or partnerships for projects where appropriate?

Kim Venn: I’m addressing this in terms of ACURA, which currently has two large projects, the TMT and the SKA. The concept of consent will be different for different communities. It starts with conversations, although we have to recognize that too much conversation can be seen as harassment. Regarding TMT, we know that there is both strong opposition from Native Hawaiians, as well as some strong support from Native Hawaiians. Our formal position is that this conversation is still going on. If it continues to the point where the community says that there is no consensus, ACURA stands by its statement at the 2020 CASCA AGM back in May. With the U.S. decadal survey Astro2020 coming out last week, the U.S. is now having conversations about this as well. The TMT is calling for “community healing” and with the NSF involved, there is now a timeline for discussions with the federal government that can involve community healing. As a member of TMT, Canada has been asking for this and pushing for it within the TMT project for some time now. Native Hawaiians have invited the TMT Board members, community members, project office members to ho`oponopono, to participate in peace, and we are respecting that request and that process.

Luc Simard: Regarding SKA, we have contacted the host countries to find out more about the process that the project is following in Australia (where there is work on a land use agreement) and in South Africa (where there is an MOU). The realities are very different in both places. But it goes farther than that: local communities have an impact, say, for example, on the array configuration in Australia. It’s a relationship that has an impact through consultation and decision making. We’ve done our best to assess that the SKA meets the spirit of LRP2020 recommendation #1.

For a completely new facility, it is important to learn about the local context and the needs of the local community. Within Canada itself there is a diversity of solutions that have been put in place. Consent starts from a place of respect, building trust, to discussion of the guiding principles. For the SKA, the first thing they did was discuss guiding principles, and produced a document called “Standing Strong”, which will guide other future facilities that Australia may be involved in.

Question 5: From a historical perspective, how has your organization been inclusive of Indigenous peoples and have there been any failures by your organization to be inclusive?

Rob Thacker: CASCA was established in 1971 and there has been significant evolution. One historical example was development on Maunakea, where CASCA was involved in the development and initial discussions of the CFHT. Our understanding of the nature and impact of colonialism has evolved over the years (Maunakea is again an example). This is a challenging question to answer, there absolutely have been wrongs, such as the Residential Schools. We still are subject to the criticism that we are being reactive rather than proactive in how we approach inclusion.

Norm Murray: People don’t always live up to their ideals; sometimes they’re not even aware of problems with things they are involved in. We have limited time and bandwidth, it’s a question of how you want to spend your time and energy on the planet. My first step would be to talk to other astronomers of an Indigenous background, because they would know more about what has gone on. I personally can’t say with any confidence what we have or have not done well.

Question 6 (from the chat): why are there so few Indigenous faculty members?

Kim Venn: Astro2020 summarized it beautifully for the U.S.: “… racial and ethnic diversity among astronomy faculty remains abysmal”. We don’t have those statistics for Canada but we can look around us and see a similar situation. Poverty rates in our Indigenous communities are also abysmal. The history is horrifying the more we learn. It’s reflected not just in astronomy, but also in universities and throughout the educational system. I see 153 people on this call, which is a significant number of people who are interested and hopefully committed to changing this situation, to reaching out and doing something. This guides ACURA’s approach to sharing resources, because a lot of us don’t know how to start. A very simple thing would be to have a Canadian AISES (American Indigenous Science and Engineering Society) chapter at your university, which provides support for Indigenous students in science and engineering. We also need a protocol for reaching out to Indigenous communities so that we are not burdening them with our lack of knowledge.

Question 7: what training is available for people who want to start?

Kim Venn: The University of Alberta has an on-line Coursera class called “Indigenous Canada” that is easy to take and very informative.

Rob Thacker: A member of the audience asked a question about “how do we engage? You have to rely on things happening in an organic way. It is easier to start making connections through people who are already involved in projects with communities, allowing you to be introduced. And learning from Indigenous elders who are invited to the university for open and free discussion: we need two-eared hearing, in addition to two-eyed seeing.

(Summary by Chris Wilson, LCRIC chair, with written contributions from Rob Thacker to questions 1 and 2 and review by members of the LCRIC)

President’s Message

By / par Rob Thacker (CASCA President)
(Cassiopeia – Winter / hiver 2021)

First off, I want to thank all the members of CASCA as well as staff that devote their time to the operation of the Society. We cannot function without you, CASCA exists largely on the back of volunteer labour. The sum total of our employed staff is about 1/40th that of the AAS, because quite frankly we don’t even add up to one full time staff member. Everything that you help accomplish is quite literally above and beyond!

This report is incomplete in that I had hoped to provide a more detailed update on some internal discussions and unfortunately because one meeting got pushed so close to the holiday break and that I need get approval on a couple of things, I will have to let that go until January. My apologies.

I want to wish you good health over the holiday season. I sincerely hope you can take time to replenish reserves and rejuvenate, at least to whatever extent is possible.

On High-Performance Computing and Sustainability

Forgive me the indulgence of talking about something that is close to my heart on two accounts, high performance computing and sustainability. Following detailed analyses of emissions in Australian astronomy [1], motivated by prior discussions [e.g., 2], I’ve heard a number of people express concerns about the energy cost of high-performance computing (HPC) in astronomy. While I cannot possibly suggest a complete strategy in a short discussion, I can at least outline some of the key concerns and provide some useful background. This is an opinion piece though, rather than a detailed analysis.

I will not spend any time talking about improvements in algorithms or software. I fully accept these are absolutely fundamental areas in which energy consumption improvements are possible. Indeed, we’re already witnessing a detailed discussion about this in astronomy [3]. A wider view of the whole issue across algorithms, software and hardware is already spurring detailed thinking within hardware design circles [4].

From the outset I think we need to be clear that energy usage isn’t a discussion that happens in isolation and draws on value judgments. If it were possible to build computing centres running entirely on renewable energy, then the actual energy usage might be considered moot. Indeed, this has become a strategy for countries (e.g., Scotland) to offer data centre companies access to renewable energy to reduce their carbon footprint. Of course, in practice such approaches disguise the fact that other energy usage continues to rely on traditional more polluting energy sources. After all, getting to “net-zero” means doing so across multiple sectors. Collective action is needed, and we have to play our part in that given the emissions intensive nature of our profession [2].

Global awareness of energy consumption in data centres and HPC is growing, many of you have likely heard concerns about Bitcoin’s incredible energy usage. That said, it is fair to say that there is a recognition of the potential impact of this demand, over the past 15 years there has been a steady interest in improving energy efficiency in computing. That’s been achieved through multiple approaches, but I’ll focus on just two: data centre design and chip/server design.

Starting with chip/server design, if we look at energy efficiency increases over several decades the results are quite staggering. Comparisons are normally provided going back to the earliest machines, but let’s consider a Cray-1, from the 1970s, arguably what many consider the first supercomputer. With a performance of 160 Mflops, and a power draw of 115kW, its flops per watt work out to 1400. To provide a comparison we need to consider entire systems including their multiple overheads. Fortunately, Dr Wu Feng has been pushing for these numbers for many years and is the custodian of the “Green500” alternative to the “Top500” list of supercomputers. The most efficiency systems available today achieve 39.4×109 flops per watt, albeit using hardware optimized for Linpack calculations (more on that in a moment). An improvement of 28 million in 50 years! For comparison, the peak speed of a single CPU die, and I think 48 core Fujitsu A64FX vector processor is the most apt comparison, has only increased by a factor of around 50,000 relative to the Cray-1.

This dramatic increase in hardware energy efficiency has resulted for multiple reasons. Firstly, for many years “Dennard Scaling” meant that each time circuitry was reduced in size by a factor of 0.7x, the overall power requirement would reduce by 50% (essentially power was proportional to the area of the transistor). This allowed CPU designers to increase frequencies for many years, but by around 2005 the scaling broke down due to fundamental issues with “leakage” of power through the transistor substrate. Thus, the era of increasing clocks speeds came to a halt.

Realizing that clock speeds could no longer increase, designers turned their efforts to packaging more cores on to a single die, not a trivial feat when one considers the memory design needed. Equally importantly, they also needed to begin improving the energy efficiency of individual CPU cores. Remarkably through a series of power management and packaging advances, the energy efficiency of CPUs has improved by a factor of at least 20 since 2014.

One could make a strong argument that since 2010, energy efficiency has become the key design parameter of CPUs, to a considerable extent replacing overall performance concerns. That’s definitely the case for mobile devices. Around 2011, HPC experts were widely discussing that being able to build exascale systems with a “reasonable” power draw of 20 MW would require achieving 50×109 flops per watt, the most power efficient systems are not far from this value today, but the largest machines are still a factor of three or four away.

While I’ve focused on CPUs, quietly hiding in the background is another potential revolution in efficiency, specifically the rapid development of customized hardware/accelerators. Smartphones are already moving toward more and more special accelerators with hardware designed for specific operations. We’ve all seen general purpose GPU programming take off, and optimized matrix hardware is now common – indeed it is a significant part of the improvement in flops per watt on the Linpack results for the Top500. All of these approaches improve energy efficiency by tailoring hardware to specific calculations. The rise of freely and easily available CPU instruction set architectures (RISC-V, for example) may lead to domain specific architecture becoming increasingly more common place than it is today.

The third factor that has helped improve flops per watt in HPC systems is optimized design of the cooling system and integrated system management. There are also well documented examples of waste heat being used for heating in some jurisdictions, to the point where papers have been written about which locations would be most appropriate for this approach to maximize the benefits of the exported heat. Data centres that are the “hidden” power behind the cloud use these kinds of optimizations extensively.

That 28 million improvement in energy efficiency since the 1970s also benefits our desktops. Modern processors, especially those based on mobile designs, have far lower idle power than those from even 2016. Unless you really need to do “big compute” or GPGPU on your desktop, you can buy a mini pc that idles at a handful of watts but with 8 cores has enough power to take on some pretty heavy calculations. And as always, turning things off is a good thing, although systems are getting better and better at doing that themselves.

While energy efficiency is clearly better in modern HPC systems, we do face the issue of unmet demand. Analyses can always be made more complex. Simulations can always be made bigger for better resolution. In practice, like any other facility, the amount of time is limited. For HPC, at least in Canada, we’ve also been limited by practical issues around power supply, I doubt we will ever see academic systems using much more than 5 MW here. Commercial data centres in Canada with close to ten times that power requirement already exist, although we need to put those in the context of serving large communities.

Astronomy is moving towards the increasing use of HPC as are multiple research areas. We have a duty to understand how that fits in the wider picture of sustainability (and I’m not even going to open the offset discussion). My own bias is that, among other things, we need to think carefully about:

  1. Quotas and envelopes. To a certain extent they will happen naturally with equipment maintained by the Alliance (formerly NDRIO/Compute Canada).
  2. Optimizing calculations by using the right tools – not always easy as there is inertia in individual knowledge and skills. To a limited extent review of HPC applications used to handle this, for more open access systems that may not be possible.
  3. Being aware of creating accidentally unsustainable situations. This happened with Compute Canada through the growth of the user base. The same thing could happen with interfaces that disguise overall computing use.

I have to have a somewhat optimistic view that ultimately, we will transition to largely renewable energy generation and that these concerns will become less significant. But until such time as we have a reasonable control on emissions, it’s important to remember that the energy usage of our field is fundamentally a value question.

Wishing you all a Happy Holidays and may you share many moments of joy with friends and loved ones,
Rob

[1] “The imperative to reduce carbon emissions in astronomy,” Stevens, A. R. H., et al, Nature Astronomy, 4, 843, (2020).
[2] “Astronomy in a Low-Carbon Future,” Matzner, C. D., et al., Astro-ph/1910.01272
[3] “The ecological impact of high-performance computing in astrophysics,”, Zwart, S. P., Nature Astronomy, 4, 819, (2020).
[4] “There’s plenty of room at the Top,” Leiserson, C., et al, Science, 368, 1, (2020).

Cassiopeia Newsletter – Winter Solstice / solstice d’hiver 2021

winter

In this issue / Dans ce numéro:

President’s Message
ALMA Matters
BRITE-Constellation Mission Update
Canadian Gemini Office News / Nouvelles de l’Office Gemini Canadien
Update on CASTOR
CATAC Update on the Thirty Meter Telescope
CRAQ Summer School Announcement / Annonce d’École d’Été
Future Far-Infrared Space Missions: An update on Canadian Participation in the Post-SPICA Era
Report from the LRPIC
ngVLA Update
SKA Update
Sustainability Committee: Time to Rethink Rebooting Speaker Travel for Colloquia


Editor: Joanne Rosvick

Cassiopeia is CASCA’s quarterly Newsletter, published on or near the solstices and equinoxes (March 21, June 21, September 21 and December 21).

To submit a contribution please email cassiopeia.editors@gmail.com. All submissions must be received by the due date (usually 2 weeks in advance of publication) to be published in the next edition. I accept plain text and Word documents. Note that the formatting of your document will not be preserved. Please include any images as attachments in your email, not embedded in the text. Please include URLs in parentheses next to the word or phrase that you wish to act as link anchors.


ngVLA Update

By Erik Rosolowsky (U Alberta), Joan Wrobel (NRAO)
(Cassiopeia – Winter 2021)

In early November, the US Decadal Review released its rankings, identifying the design and construction of the ngVLA as one of the three top priorities for US astronomy over the coming decade. This is particularly big news for the Canadian community since the ngVLA was also recognized as one of the top priority ground-based facilities in the Canadian Astronomy Long Range Plan 2020-2030. This recommendation was conditional “pending a positive recommendation on this project from the US Astro2020 Decadal Survey,” which has now happened.

Our LRP recommends that Canada pursues scientific and technical leadership in the development of the ngVLA. To that end, Brenda Matthews (NRC) has recently agreed to serve as the co-Chair of the refreshed ngVLA Science Advisory Council (SAC). The SAC is the interface between the scientific community and the Project Office. Since the SAC’s formation in 2016 its members have provided invaluable guidance and feedback on many aspects of the ngVLA. With the Project now past the critical US Decadal review, the SAC is being reformed under this new leadership. We are also grateful to James DiFrancesco (NRC) who has served on the SAC since its inception and is now rotating off. Our community is also fortunate to have Lewis Knee and Michael Rupen (NRC) on the Technical Advisory Council for the ngVLA, presenting a strong presence in the technical leadership.

If you are excited about the ngVLA, one way you can get involved in the community is to attend the meeting Computational Astrophysics in the ngVLA Era: Synergistic Simulations, Theory, and Observations at the Flatiron Institute in New York (June 7-9, 2022).

CRAQ Summer School Announcement

By Robert La Montagne
(Cassiopeia – Winter 2021)

The Centre for Research in Astrophysics of Quebec (CRAQ) is announcing its annual Summer School, which will be held on June 15-17, 2022 in Montreal, Quebec.

This year’s topic will focus on Cosmology. This 3-day school will introduce cutting-edge observational probes of cosmology such as the Cosmic Microwave Background (CMB), intensity mapping, and gravitational lensing, with hands-on analysis examples including CMB mapmaking, MCMC parameter estimation, and machine learning. Instructors will include Adrian Liu, Cynthia Chiang, Matt Dobbs, Katelin Schutz, Jon Sievers (McGill University), Yashar Hezaveh, and Laurence Perreault Levasseur (Université de Montréal).

The CRAQ Summer School is principally aimed at graduate students in the field of physics, astronomy, and astrophysics, although students who have completed an undergraduate program in physics will also be accepted.

There is no registration fee. However, we cannot offer traveling funds or cover lodging expenses.

The Centre for Research in Astrophysics of Quebec promotes employment diversity, inclusion and equity. We encourage applications from women, visible and ethnic minorities, Indigenous peoples, persons with disabilities, and persons of any sexual orientation or gender identity. We will consider providing travel funds for individuals from these communities if they cannot attend the summer school otherwise. Please contact us using the email address below.

Additional information about the program, registration and accommodation will be available soon on this site: craq-astro.ca/summerschool.

Email contact: Summer.School@craq-astro.ca

BRITE-Constellation Mission Update

By / par Catherine Lovekin (on behalf of the Canadian BRITE Team)
(Cassiopeia – Winter / hiver 2021)

BRITE-Constellation is an international space astronomy mission consisting of a fleet of 20x20x20 cm nanosatellites dedicated to precision optical photometry of bright stars in two photometric colours. The mission continues in full science operations, with 38 datasets available in the public domain from the BRITE public archive. As of April of 2020, all data is made public as soon as decorrelation is complete, with no proprietary period.

The BRITE mission is a collaboration between Canadian, Austrian and Polish astronomers and space scientists. The Canadian partners represent University of Toronto, Université de Montréal, Mount Allison University, and Royal Military College of Canada. The mission was built, and the Canadian satellites operated by, the University of Toronto Institute for Aerospace Studies Space Flight Lab (UTIAS-SFL). The Canadian Space Agency funded the construction of the Canadian satellites, and continues to support their day-to-day operations.

Operations

There are five BRITE satellites in the Constellation, which work together to obtain well-sampled, long term continuous (~6 months) light curves in both red and blue band passes across a variety of sky fields.

As this issue of Cassiopeia went to press, the assignments of the BRITE nanosats were:

  • BRITE Toronto (Canada): This satellite observes with a red filter. It is currently finished a campaign in Cygnus, and is now being set up on the Vela Puppis field.
  • BRITE Lem (Poland): Lem observes with a blue filter, but is currently idle due to unresolved stability issues.
  • BRITE Heweliusz (Poland): Heweliusz observes with a red filter. It is currently observing the Orion field.
  • BRITE Austria (Austria): BRITE Austria observes with a blue filter. It has recently wrapped up a campaign in Orion, and is now on hold while its orbit takes it through eclipse. It is expected to resume observations in mid-December.
  • UniBRITE (Austria): Currently out of order.

The BRITE Constellation observing program is currently set through early 2022. Details of the observing plan will be available on the BRITE photometry Wiki page.

Recent Science Results

“Five years of BRITE-Constellation photometry of the luminous blue variable P Cygni: properties of the stochastic low-frequency variability (Elliott et al., arXiv:2110.12056)

Luminous Blue Variables (LBVs) are massive stars that are likely to be a transitionary phase between O stars and hydrogen-free classical Wolf-Rayet stars. The variability of these stars has been an area of study for both professional and amateur astronomers for more than a century. This paper presents five years of precision photometry of the classical LBV P Cygni taken with the BRITE-Constellation nanosatellites. The authors use the BRITE data to search for periodicities that could elucidate the drivers of variability for these stars. These data show some long-timescale variability over the course of all six calendar years of observations, but the frequencies needed to reproduce the individual light curves are not consistent from one year to the next. These results likely show that there is no periodic phenomenon present for P Cygni, meaning that the variability is largely stochastic. This suggests the variability is being caused by internal gravity waves similar to those seen in other massive stars, with P Cygni exhibiting a larger amplitude and lower characteristic frequency than the main-sequence or blue supergiant stars previously studied. These results show evidence that LBVs may be an extrapolation of the blue supergiants, which have previously been shown to be an extension of main-sequence stars in the context of the stochastic low-frequency photometric variability.

The BRITE flux, after subtracting off the global mean, with units of parts per thousand (ppt) (left) and the Fourier amplitude spectrum (right) for the 2014 data from BRITE. Each peak used in our analysis is highlighted with a different color in the Fourier spectrum, and then the fit is overplotted on the photometry with the corresponding color for that term and all previous terms. The final four-frequency fit is then used to calculate the (? −?) that is shown on the bottom panel of the photometry. Fits including the first four frequencies are shown on the left plot: 1 term (red dashed line), 2 terms (dotted blue line), 3 terms (dash-dot green line), 4 terms (solid pink). Vertical lines on the right plot indicate the frequency added to each term.

Conferences, Resources, and Social Media

Conferences

The BRITE team does not plan to host any conferences at this time.

Resources and Social Media

The BRITE Public Data Archive, based in Warsaw, Poland, at the Nikolaus Copernicus Astronomical Centre, can be accessed at brite.camk.edu.pl/pub/index.html.

The mission Wiki (including information on past, current and future fields) can be accessed here.

BRITE Constellation is on Facebook, at @briteconstellation.

The BRITE International Advisory Science Team

The BRITE International Advisory Science Team (BIAST), which consists of BRITE scientific PIs, technical authorities, amateur astronomers, and mission fans, advises the mission executive on scientific and outreach aspects of the mission. If you’re interested in joining BIAST, contact Konstanze Zwintz, the chair of BEST at konstanze.zwintz@uibk.ac.at.

CATAC Update on the Thirty Meter Telescope

By Michael Balogh (CATAC Chair)
(Cassiopeia – Winter / hiver 2021)

Recent News

The US Decadal report, released in November, clearly recognized the scientific excellence and importance of the US Extremely Large Telescope (ELT) Program, and TMT in particular. Furthermore, it lays out clear steps and milestones that the project must achieve in the next few years. Specifically, the report notes that “it will be necessary for NSF to commence with an external review with a target completion in 2023, in order to evaluate the financial and programmatic viability of both proposed U.S. ELT projects”. If states further that a decision for US federal investment should be predicated on several things, including final site selection and agreed-upon commitments from partners “for all of the necessary capital and operations money, pending only NSF investment”. This is certainly a challenge for TMT, but the clarity is very welcome, and the viability of the project is going to come rapidly into focus over the next two years.

CATAC is aware that if NSF becomes a TMT partner, this will have an impact on Canada’s share and opportunity for scientific and technological leadership. All avenues must be explored to maintain a significant share in the telescope, to fulfil our own Long Range Plan recommendation that “this participation be at a level that provides compelling opportunities for Canadian leadership in science, technology and instrumentation”. Astro2020 provides a clear roadmap and timeline that will help all partners, including Canada, to secure the resources necessary to satisfy their own ambitions. CATAC has begun working closely with GAC as they explore how to fulfil the LRP recommendation to ensure Canada has access to a VLOT in case of delays to, or failure of, TMT.

Site Update

The University of Hawaii released a draft plan for Mauna Kea in September, and held a period of open consultation after its release. Among other things, the draft calls for the number of astronomical sites at the summit to be reduced from fourteen to nine. The Caltech Submillimeter Observatory and Hōkū Keʻa decommissioning process is already underway, and the VLBA antenna will be decommissioned prior to 2033. A process is outlined to identify the remaining two facilities by the end of 2025. The sites of the decommissioned facilities will not be available for future astronomy use. The site on ORM remains a viable alternative for TMT, and CATAC reiterates that it remains scientifically acceptable.

The Maunakea legislative working group established by the Hawaii House of Representatives has been active through most of the year. Their mandate is to propose a new management structure for the mountain. There is information, including meeting notes, available on their web page. Their report is anticipated for late December 2021 or early 2022.

The site on Roque de los Muchachos Observatory (ORM) in La Palma remains a viable alternative for TMT, and CATAC reiterates that it remains scientifically acceptable. However, in August of this year, an appeal by environmental group Ben Magec to annul the land concession for TMT was successful. This decision has been appealed to a higher court.

TMT Science Forum

Canada was looking forward to hosting the next TMT Science Forum, in Vancouver in 2022. Due to the continued travel uncertainty associated with the pandemic, as well as the delay of Astro2020 and the imminent launch of JWST, it was decided to postpone this event until 2023.

CATAC Membership

Michael Balogh (University of Waterloo), Chair, mbalogh@uwaterloo.ca
Bob Abraham (University of Toronto; TIO SAC)
Stefi Baum (University of Manitoba)
Laura Ferrarese (NRC)
David Lafrenière (Université de Montréal)
Harvey Richer (UBC)
Kristine Spekkens (Royal Military College of Canada)
Luc Simard (Director General of NRC-HAA, non-voting, ex-officio)
Don Brooks (Executive Director of ACURA, non-voting, ex-officio)
Rob Thacker (Acting CASCA President, non-voting, ex-officio)
Kim Venn (TIO Governing Board, non-voting, ex-officio)
Stan Metchev (TIO SAC, non-voting, ex-officio)
Tim Davidge (TIO SAC Canadian co-chair; NRC, observer)
Greg Fahlman (NRC, observer)

ALMA Matters

ALMAlogo

By / par Brenda Matthews (ALMA)
(Cassiopeia – Winter / hiver 2021)

Cycle 8 and Canadian ALMA Allocations

Cycle 8 observations began on September 30, 2021. The array is currently in Configuration 6, and the array configurations will gradually contract over the coming months.

This cycle, PIs from Canadian institutions were allocated nearly 8.4% of the available time for North American projects on the main 12m-Array, which is above the nominal 7.125% Canadian fraction. Globally, almost 20% of all allocated projects had at least one Canadian on the proposal.

Over the lifetime (so far) of the ALMA observatory since Cycle 0, Canadian PI projects were allocated 6.3% of the North American fraction. Over the past three cycles, Canadian PI projects were allocated 7.6%.

Analytics on Dual Anonymous Peer Review for Cycle 8 shows that the DPR reduced nearly all biases, with the exception of native English fluency and a modest bias against first time proposers.

Cycle 9 Pre-announcement

The pre-announcement for the Cycle 9 Call for Proposals is scheduled for 16 December 2021. The new capabilities planned for Cycle 9 will be announced at that time.

VERTICO Update

A Canadian-led ALMA Large Program has completed the largest imaging survey of molecular gas—the fuel needed for star formation—in one of the most extreme regions of the Universe, the Virgo Cluster.

The VERTICO—Virgo Environment Traced in Carbon Monoxide—Survey observed the gas reservoirs in 51 galaxies in the nearby Virgo Cluster and found that the extreme environment in the cluster is robbing galaxies of their star-forming fuel. The recent survey paper led by Dr. Toby Brown, Plaskett Fellow at HAA, was published Astrophysical Journal Supplement Series and provides the clearest evidence yet that the environment surrounding galaxies can reach far within the galaxies and perturb their molecular gas.

For those who would like further information, there is the National Research Council press release, Conversation article, and YouTube video to accompany the paper.

Visualize Data in the ALMA Archive with CARTA

The ALMA Archive has recently incorporated the Cube Analysis and Rendering Tool for Astronomy (CARTA) into the ALMA archive. With CARTA you can quickly visualize ALMA data products interactively in the archive without spending the time and bandwidth downloading them to your personal computer. In particular, some imaging products are being stored in the ALMA archive, like the ARI-L imaging products from early ALMA cycles. ARI-L images can be explored with CARTA and the downloaded in a science ready form. The successful integration of CARTA is nationally exciting since CARTA was initially developed in Canada using ALMA Development funding based on prototype work from Canada’s CyberSKA project. For more information on using CARTA in the ALMA archive, see this site and for more information about the CARTA project in general, see the CARTA page.

Video Tutorials for New ALMA Users

The NAASC is pleased to announce a new YouTube channel for the ALMA Primer Series of video tutorials. The platform currently hosts several short video tutorials designed to explain aspects of ALMA and interferometry, such as estimating sensitivities for proposals, understanding the largest angular scale, and the ins and outs of weighting schemes.

Screenshot from the tutorial video “Weighting in Imaging”.


The site will be populated as well with short animations from the videos suitable for use in seminars and live training. New videos will be added from time to time.

Check out and subscribe, here!

Band 6 Upgrade Approved

The ALMA Board met in November, and one of the key outcomes was the approval of an upgrade to ALMA’s Band 6 capabilities. The upgrade will improve ALMA’s bandwidth and spectral line sensitivity in the most productive ALMA band. A special session will take place at the upcoming AAS meeting (#239) during which plans for increased wideband sensitivity will be presented

Update on CASTOR

By / par Patrick Côté, John Hutchings (NRC Herzberg Astronomy & Astrophysics Research Centre)
(Cassiopeia – Winter / hivers 2021)

CASTOR has moved forward on a number of fronts since our last report.

  1. An export permit to exchange technical details with the IIA team in India is in process. This will enable full exchange of technical details as we move forward in defining the partnership.
  2. The RFP for the industrial phase 0 contract has been re-issued following some delays in the process. A contract should be approved and issued by early January.
  3. ISRO are seeking an interim agreement to work on a joint mission. A brief meeting in October between the CSA president and the ISRO chairman in October broached the subject and it is being followed up by CSA.
  4. The MOU annex between CSA and NRC for ongoing STDP support and phase 0 work has been signed by Directors General on both sides. Plans are thus now moving forward to fund university-based work towards the final deliverables.
  5. The MOU between CSA and JPL remains in process, as JPL plan all their activities resulting from the US decadal plan. The technical collaboration will begin early in 2022 to support the STDP industrial contracts. This also involves e2v as suppliers of the detectors.
  6. CSA recently announced a plan to fund a new collection of Topical Teams to map out their future activities in space exploration. The intent is not to replace LRP2020, but to provide additional details and ideas needed for long-term strategic planning. This is an opportunity for the community to update and emphasize the case for CASTOR, which has capabilities across the full range of topical teams.

The STDP work with ABB, Honeywell, and Magellan is proceeding well and the next contract milestone meeting on December 14 will reflect that. We have also continued to interact with the Canada-wide optical link network as an attractive option for CASTOR.

For more information on the mission, see here.

Future Far-Infrared Space Missions: An update on Canadian Participation in the Post-SPICA Era

By / par David Naylor, Locke Spencer (University of Lethbridge), Doug Johnstone (NRC-Herzberg/University of Victoria)
(Cassiopeia – Winter / hivers 2021)

It has been one year since we shared with you the news that ESA had decided to cancel support for the SPICA mission within the M-5 competition on programmatic grounds. Since that time we have continued to monitor the evolution of the international far-infrared (FIR) space astronomy landscape. The goal of this message is to provide a brief update on the current status of a potential FIR space telescope and the potential for Canadian involvement.

The 2020-2030 Canadian Long Range Plan in Astronomy report (LRP2020) was released in late 2020. The document recognizes the importance of a cooled far-IR space telescope. Canadian participation in such a mission is ranked as the number two priority large investment in space astronomy (LRP2020 p. 69-71). This investment would capitalize on Canadian heritage and expertise in the FIR including Herschel and significant work on SPICA/SAFARI.

Earlier this month, the US Decadal Survey on Astronomy and Astrophysics 2020 (Astro2020) was released. The Astro2020 report recognizes the ESA cancellation of SPICA and resultant gaps/opportunities in FIR astrophysics (Astro2020 Sec. 7.5.3.3) and recommends a FIR probe class mission (~$1B, ~2030 launch) be considered to address this gap. This news has sparked thought and exploration within the international SPICA community regarding potential contributions and partnerships with a US-led FIR probe class mission (or similar, Astro2020 provides a recommendation which can evolve towards the most suitable option given available resources and potential partnerships). Several SPICA instrumentation partners have identified ways to transition contributions originally envisioned for SPICA to a US-led FIR mission at their National Agency levels. While nothing has been decided at this point, there is clearly interest within the SPICA instrument/science teams in pooling resources and supporting such a mission.

Given the commentary in the US Decadal Report, the astronomy communities in the US and Europe have also been ramping up their efforts to discuss and define the most important scientific drivers for a near-term, likely scaled down in scope, FIR space mission. Some of you may have received an email message from these groups. On the US side, Matt Bradford (Caltech, SPICA team member) and Jason Glenn (Goddard, Herschel team member), are planning an in-person community workshop in Pasadena in March (dates TBC). On the European side, Denis Burgarella (France), in collaboration with Laure Ciesle (France) and Carlotta Guppioni (Italy), are planning a similar workshop The next generation mid/far-IR space missions – formulating a European perspective to be held in Paris, 9–11 February 2022. In addition, a request has been submitted for a space-based FIR astronomy session at the 2022 European Astronomical Society. All of the endeavours described above are open to and welcome Canadian participation.

The Canadian Space Agency has recently published a request for proposals to engage the scientific community in an exercise to plan the future of Canadian space science. A related email from Douglas Scott was circulated on December 9th through the CASCA exploder. The first step of this exercise is to form “topical teams” that will coordinate discussions in one of four astronomical themes; a space-based follow-up to the LRP. We encourage the FIR community to join these teams, with the expectation that over the next year or so there will be meetings (presumably over zoom) to discuss planning and prioritisation in the various research areas. The resulting reports that will be synthesized by the CSA into a 2022 version of the “2016 Canadian Space Exploration: Science and Space Health Priorities for the Next Decade and Beyond”.

Given the rapidly evolving situation we believe it would be useful to hold a Canada-wide virtual meeting in the next few months, ahead of the US and European science workshops, to better understand the range of FIR astronomy interest across Canada and to encourage participation in the forthcoming workshops. To this end we have setup a far-infrared space astronomy (FIRSA) webpage as a portal to the latest news, workshops/conference, publications and links on FIRSA matters. The page will include a link to the SPICA archival material. The existing SPICA supporter list will become the FIRSA supporter list. Participation is open to everyone. Instructions for joining, and current membership of the list are posted on the website.

Over the last 3 decades the CSA has provided support for Canadian participation in a number of FIR space astronomy missions: ISO and AKARI at modest levels; Herschel through the HIFI and SPIRE instruments and their teams; and for the last decade technology development (e.g., through FAST and STDP programs) for the SPICA mission. This technology development is currently ongoing and Canada’s expertise in this area is highly regarded. One lesson learned from SPICA is that equal or similar division of work packages between partners is an existential threat to a project. While Canada, and individual European nations, have much to contribute to a probe class mission, it is clear that if realized such a mission would be NASA-led.

In summary, the demise of SPICA has raised the profile of a FIR mission within the US Decadal report. While the situation is extremely fluid there remain reasons for optimism and excitement at the prospect of a smaller, less-ambitious, but potentially nearer-term FIR space telescope mission led by NASA. What is clear is that through its contributions to Herschel and SPICA over the last two decades, Canada is in a strong position to join a probe mission. We will endeavour to keep supporters informed of developments as they occur and look forward to meeting in person in Pasadena.

Finally, on a personal note, having led the Canadian effort on SPICA for over a decade (and before that Herschel/SPIRE) and with retirement in sight (my last MSc student starts in 2022) it is time to pass on the baton. Locke will assume the reins for the UL effort and Doug will continue to champion the science. I will be available to mentor and provide advice if it is needed and look forward to seeing Canada’s contributions to the next FIR space astronomy mission.

Keep safe everyone.