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27 April 2021: PROJECT & SCIENCE NEWS Save the date, August 9-13, for the 2021 Rubin Project and Community Workshop (PCW), which will be virtual again this year. We look forward to engaging with our colleagues during the event, and we will provide more details as they become available. The Data Management team held its third and final of the first set of photo-z virtual forums on April 8th, as part of its ongoing effort to seek input from the science community regarding which photo-z estimator(s) should be adopted to generate photometric redshifts (photo-z) for the LSST Data Release Object catalog. This first set of forums focused on defining evaluation criteria for photo-z estimators with the community. The next set of forums will begin on Tuesday May 11 at 12pm Pacific, and will focus on working with the community to prepare letters of recommendation for photo-z estimators to use in DRP. The call …

13 April 2021: PROJECT & SCIENCE NEWS Rubin Construction Project leadership has announced an update to the project schedule: Based on currently available information, it’s expected that regular survey operations for Rubin Observatory will not begin before October 2023. We acknowledge that this announcement is disappointing, and we appreciate the patience and flexibility of our community and supporters as we continue to clarify the impact of COVID-19 on our construction effort. Additional details will be provided as they are available. The Survey Cadence Optimization Committee (SCOC) would like to issue a reminder of the upcoming April 15th deadline for Cadence Note submission. More information is available on lsst.community.org. A new video, a compilation of on-sky images taken by the Rubin Observatory Auxiliary Telescope (AuxTel) spectrograph during a March observing run, is available in the Gallery. Read more about how these image animations are helping to test and refine AuxTel hardware and software in …

23 March 2021: Project & Science News The first completed filter for the Rubin Observatory LSST Camera has arrived at SLAC National Accelerator Laboratory. The r-band filter was delivered to SLAC on March 12th, marking an exciting milestone for the LSST Camera team. Read more about the event in this news item, and see photos in the Gallery. A new time-lapse video that shows ten years of Rubin Observatory construction in just one minute is now available on our YouTube Channel. The Rubin Observatory Communications team is partnering with the Space Telescope Science Institute (STScI) during the month of March for a social media campaign highlighting Dr. Vera C. Rubin and Dr. Nancy Grace Roman as part of Women’s History Month. Search #RubinRomanStars to follow the campaign. Operations Updates This year, the Rubin Observatory’s Data Preview 0 (DP0) will make simulated LSST-like data products available in the Rubin Science Platform (RSP) for up …

9 March 2021: Project & Science News The Top-End Assembly (TEA) for the Telescope Mount Assembly (TMA) was lifted by crane into the observatory dome and installed on the TMA on March 2nd. The task was completed successfully and was a highly celebrated milestone for Rubin Observatory; read the details in this news item, and view photos in the Gallery. There is also a video created from drone footage on our YouTube channel. The LSST Camera i-band and z-band coated filters were shipped from the coating vendor, Materion, in Massachusetts, and received without any issues at Lawrence Livermore National Laboratory where they will be mounted in their frames prior to delivery to SLAC National Accelerator Laboratory. These are the second and third filters to be delivered from the vendor. Although we hoped to enjoy the Rubin Observatory Project and Community Workshop (PCW) in person this year, Rubin 2021 will take place virtually during …

23 February 2021: Project & Science News The Survey Cadence Optimization Committee (SCOC) has extended the deadline for the Cadence Notes Solicitation Call from March 15th to April 15th, 2021. The change is intended to provide the community additional time to evaluate the new simulations in v1.7 (in particular, the new and improved ‘rolling cadence’ simulations in this release). Additional documentation about all of the available simulations can be found with the v1.7 release announcement. More information about cadence optimization is also available on community.lsst.org (login required), and detailed technical discussions are also taking place on the Slack channel #sims-maf Rubin Observatory Auxiliary Telescope (AuxTel) observing runs continue on Cerro Pachón; the second run of 2021 wrapped up in mid-February. The observing team on the summit continues to benefit from real-time remote support provided by people in four countries, on three different continents. The integration of telescope hardware and software is progressing well, …

9 February 2021: Project & Science News The Rubin Observatory Data Management (DM) team seeks input from the science community regarding which photo-z estimator(s) should be adopted to generate photometric redshifts (photo-z) for the LSST Data Release (DR) Object catalog. As part of DM's photo-z roadmap, which is summarized at this link, all are invited to join one or more of the monthly virtual photo-z drop-in discussions described on community.lsst.org (login required). The deadline for the Cadence Notes Solicitation Call from the Survey Cadence Optimization Committee (SCOC) has been updated from March 15th to April 15th, 2021. These Cadence Notes will provide feedback on the existing large set of survey cadence simulations to the SCOC. Additional details are available at this link. The first observing run of the Rubin Observatory Auxiliary Telescope (AuxTel) since the COVID-19 construction shutdown finished successfully; read details about this run and upcoming plans for AuxTel in this recent …

26 January 2021: Project & Science News Rubin Observatory participated in the first all-virtual American Astronomical Society Winter Meeting (AAS237) on January 11-16, 2021. Details about the Rubin Open House, exhibit booth, and special sessions can be found in this recent news item. On January 19th, the Rubin Observatory Auxiliary Telescope (AuxTel) team resumed on-sky observations for the first time since the summit construction shutdown in March 2020. Observing Specialist Alysha Shugart, who joined Rubin Observatory in November 2020, participated in this observing run. Craig Lage was also part of the summit team after recently relocating to Chile. The onsite observers were supported by a remote team, allowing minor issues to be identified and solved in real time. Telescope pointing and imaging have now been re-verified and the team has begun to obtain spectral data. See a recent AuxTel image here. The AURA Base Facility in La Serena, Chile, has been completed after …

22 December 2020: Project & Science News This will be the last News Digest for 2020; Rubin Observatory wishes all our colleagues and their families a very happy and relaxing holiday. This year’s holiday card is featured on our website, along with a 2020 in Review news item that highlights the achievements of the past 12 months. Rubin Observatory will be participating in the American Astronomical Society Winter Meeting (AAS237) on January 11-16, 2021. If you’re attending the virtual meeting, we hope you’ll participate in the Rubin Observatory Open House on Tuesday, January 12th from 12:00-1:30 EST. Rubin will also have a virtual exhibit booth, which can be accessed from the meeting exhibit hall. Visit our booth to take a fun quiz, and you might win your very own limited-edition Rubin Observatory swag item. The AAS Meeting will also feature a special Dark Energy Science Collaboration (DESC) session on Thursday, January 14th at …

9 December 2020: Project & Science News Rubin Observatory now has an official logo! The logo premiered on December 3rd with a press release, social media posts, and announcements on all the Rubin communications channels. The logo is a visual representation of Rubin Observatory’s central purpose: to collect light from celestial objects and transform it into data for scientific discovery. Read more about the logo and its development in this news item. The Rubin Observatory Commissioning Camera (ComCam), arrived safely at the summit facility on November 16th, and has successfully completed functional testing. The ComCam quad box, which contains the utilities necessary to operate the camera, has been integrated with the refrigeration pathfinder, which will allow ComCam to condition and demonstrate the custom-made refrigeration system on the telescope before the LSST Camera is installed. Photos of ComCam in the white room of the summit facility are available in the Gallery. Dome cladding work …

17 November 2020: Project & Science News Construction activity on Cerro Pachón continues to expand, with approximately 40 people working on the summit each day last week. That will increase this week, with the restart of the team installing critical telescope utilities. The contracted team for the dome is now about 20 people who are focused on getting the dome enclosed before the TMA team arrives in January. The dome cladding is going up fast! Photos are available in the Gallery. The Rubin Commissioning Camera (ComCam), which has been at the base facility in La Serena since May because of COVID-19 restrictions on the summit, is scheduled to move to Cerro Pachón this week, where it will be installed on the third level of the summit facility. The team in Chile has been preparing for this move for several weeks and they hope to get ComCam up and running on the summit very …

3 November 2020: Project & Science News The LSSTC Enabling Science 2020 Broker Workshop took place virtually on October 27-28. This workshop brought together representatives of all alert broker development teams, Rubin Observatory staff members, Science Collaborations members, and astronomers who are (or will be) using alert brokers for science. Participants made presentations about broker services and products, and the potential science cases they enable. Breakout discussions covered broker-related tools, algorithms, and catalogs, and strategies for collaboration to solve common issues. All of the slides and video recordings of the presentations are available on the workshop’s website, and some associated discussions appear in the Alerts & Brokers category on Community.lsst.org. A follow-up workshop is being planned for early 2021. The Survey Cadence Optimization Committee (SCOC) recently announced a virtual workshop which will take place on December 8-9, 2020. The SCOC is working to formulate a recommendation for the initial survey strategy by December …

21 October 2020: Project & Science News Last week, at SLAC National Accelerator Laboratory, the LSST Camera team conducted a successful test verifying the clearance between the filters and the shutter as the filter moves from its storage position to its online position. The level of clearance is extremely small to meet the optical design distance between the filter and the L3 lens. The completion of this test is significant for the Rubin Project because it retires some key interface risks for the Camera. Additional tests that will further verify the interoperability of the various Camera components are ongoing. Photos and video of the tests are available in the Gallery. An informative article on how Rubin Observatory and the LSST Camera will advance the study of dark matter, titled “A Powerful New Tool to Study the Cosmos,” was published in Symmetry Magazine on October 13th. Read the article at this link. Limited construction …

6 October 2020: Project & Science News A productive meeting of the AURA Management Council for Rubin Observatory (AMCR), AURA’s oversight and advocacy committee for Rubin, took place virtually on September 23-24. The report from the committee was submitted to the Rubin management team shortly after the meeting, allowing the leadership team to efficiently begin addressing the committee’s recommendations. Limited construction activities resumed on Cerro Pachón on September 28th, coinciding with the easing of the quarantine restrictions for the La Serena area, and following a thorough review to ensure that summit work could resume safely. Work will ramp up gradually over the next few months to ensure the team has time to re-adapt to working on the summit, and to adjust to the new COVID-19 protocols and procedures that are now in place. During the first week of the restart, a team of approximately 15 to 20 individuals worked on the summit for …

23 September 2020: Project & Science News The first images taken by the LSST Camera at SLAC National Accelerator Laboratory received lots of attention from the media and the public after a press release announcing the milestone was issued by SLAC on September 8th. A web viewer for the images that was included with the press release received almost eight million hits in a 24-hour period, and the Romanesco image was by far the most popular! On September 11th, Rubin Observatory participated in a thorough audit and review with AURA and NOIRLab to determine whether planned “Phase 1” work activities can safely be restarted on Cerro Pachón. These include limited construction activities for Rubin Observatory and limited science operations for the existing observatories. The plans have been carefully developed by members of the technical, management, and safety teams over several months to establish the highest level of safety for those involved in the …

8 September 2020: Project & Science News The LSST Camera team at SLAC National Accelerator Laboratory has released the first 3200-megapixel digital images taken using the Camera’s full array of imaging sensors. These are the largest images ever captured in single shots, and they are a successful test of the Rubin LSST Camera’s focal plane, which was completed at SLAC in January 2020. An overview is provided in this news item, which includes a link to the images and more details about this exciting achievement. A National Science Foundation (NSF)/Department of Energy (DOE) Joint Status Review took place virtually August 31st - September 4th. Members of the review panel congratulated the Project for good progress made before the COVID-19 construction shutdown, and commented that management has done an admirable job of identifying COVID-19 impacts to the Project and planning accordingly. The review committee noted that prior recommendations have been adequately addressed, and presented …

18 August 2020: Project & Science News Rubin Observatory's very first virtual Project and Community Workshop (PCW) took place August 10-14, 2020, and it was a resounding success. The all-online format allowed more people to participate in this year’s workshop than ever before; a total of 706 people registered for meeting, which featured plenaries, breakout sessions, and even a social activity with virtual board games. Rubin colleagues in Chile also presented daily in Spanish for all interested participants; topics included specific parts of the project where hands-on work is performed by teams in Chile. Read more about the week’s activities in this news post. A mandatory quarantine was declared in the La Serena/Coquimbo region starting July 29th. An end date was not announced, but the order will be reviewed weekly. The quarantine affects Rubin activities on the summit; although Rubin staff still has permission to perform equipment and facility inspections, we are limited …

28 July 2020: Project & Science News The Rubin 2020 Project and Community Workshop (PCW) is right around the corner, (August 10-14), and there are currently 350 people registered—a new record! If you haven’t registered yet please do so as soon as possible on the meeting website. Rubin Observatory Project staff participated in a Joint Directors Review during the week of July 20-24, in preparation for the Joint Status Review scheduled for August 31-September 3rd. The review committee complimented the progress made by the Project up to the beginning of the COVID-19 pandemic, and commented favorably on the Project’s modifications and plans to address issues related to the COVID delay. A group photo from the review is available in the Gallery. The Rubin Observatory/LSST Science Collaborations will host a two-day hackathon on Aug 6-7, immediately before the Rubin 2020 PCW (Aug 10-14). The goal of the hackathon will be to kickstart work on …

14 July 2020: Project & Science News The schedule for this year’s Rubin Observatory Project and Community Workshop (Rubin 2020), to be held virtually August 10-14, is now available at this link. This year we’ll have “Rubin flash talks” in place of posters. If you’re interested in giving one of these then please make sure you register by July 24th. Vera Rubin’s birthday is July 23rd, and the Rubin Observatory Communications team is planning a social media celebration in her honor! Keep an eye on Rubin social media accounts, especially twitter (#BirthdayVeraRubin), for fun facts, trivia questions, and even some music. Links to Rubin social media accounts can be found on the Rubin Observatory website (in the bottom right corner). The Satellite Constellations 1 (SATCON1) workshop, facilitated by NOIRLab and AAS with support from NSF, took place virtually June 29-July 2. Four members of the Rubin Observatory Project gave presentations at the workshop: …

30 June 2020: Project & Science News Registration is now open for this year’s Project and Community Workshop (Rubin 2020), to be held virtually on August 10-14. More than 200 people have already registered for the event, and the agenda is close to being finalized. Visit this link for the most up-to-date information about the workshop. On Wednesday, June 10th, a day designated to Strike for Black Lives, many Rubin Observatory Project & Operations members paused their normal work activities and participated in deep discussions about Black representation and equality in our community. These discussions have continued with the goal of creating and implementing a meaningful action plan. A Town Hall (date TBA) is currently being planned; this event will provide a safe space for all to connect with one another to discuss ways that Rubin Observatory can be better at including and advocating for Black people. More information about the Town Hall …

9 June 2020: Project & Science News The Rubin Observatory Project leadership team released a statement on June 3rd in response to the ongoing protests against racial injustice. Rubin Observatory condemns discrimination and racism, and is committed to supporting diversity. Read the full statement on our website. On May 14th, the IT group in La Serena, Chile, enabled the utilization of internal routed traffic in Rubin Observatory's Long Haul Network. This means that a group of clusters, along with Commissioning Camera forwarders deployed at the base, will use this dedicated link to transfer data when the destination is the National Center for Supercomputing Applications (NCSA). This work marks an important milestone towards the completion of the Network baseline of Rubin Observatory. Photos are available in the Gallery. A regular inspection of the Cerro Pachón construction site took place on May 26th. This visit included more work on the Dome and a detailed inspection …