2023-01-23 DM-SST Agenda and Meeting Notes

Short : ls.st/dmsst 

Zoom: https://noirlab-edu.zoom.us/j/97839121776?pwd=K1JPeUpSMXFvSXJSa2xORGkyVk5zdz09

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PST news: 

• AURA/Matt mountain encouraging people to start to prepare for the 2030 decadal. Main topic for us is what to do with Rubin Observatory after 10 yrs / after LSST. There is a the Kahn et al. PST White paper  and an aligned Snowmass paper. Discussion of options but no concrete proposal. Considered low priority by PST.
• Rubin Key Milestones Celebration and Planning Strategy document - input from JWST is that we are already late with preparations. What kind of image will be used for first light images , how will we communicate the unique aspects of LSST?  Various committees have been set up, e.g Simonyi Naming Organizing Sub-Committee, Rubin First Light Sub-Committee (RFLC), Image group, etc. Image group is led by the PS and will feature various images and DPs from LSST. 
• Steak alert censoring: High-level meeting to discuss the possibility if introducing more stringent cuts on the alert but no AVS at LLNL (or anywhere). The current plan is to not issue alerts for sources detected in difference images that are elongated and whose length corresponds to angular speeds greater than 30 deg. per day (10s of arc secs) but rather send them to the AVS at LLNL where they have access to classified satellites – those that do not correspond to an asset are sent back to us for release. The new proposed plan would make the cut more stringent, e.g. 5/10 deg. per day with the 80hr embargo period applied to all, but with no need to send them to LLNL (or anywhere). They all then become public after 80hrs. This is a simpler implementation but will result in more restricted images. 
• AMCR – positive about technical progress over last month but concerned about schedule slip and remaining reserve of 6 weeks (end CY 2024). 

  high-level recommendation to change the way we report dates – replace "not earlier than" = to "no later than". A caveat is that we can do this only once. Two major events need to happen before we can change to this model 1) Dome completion actual date and 2) When will LSSTCam actually arrive on the summit. 

• Roman issued call for input to their core community surveys

1-1s 2023

• I have set up new times for 1-1s with everyone on 2023
• Starting next week 2023-01-30

• tag up on the AVS  happening now with Bob and Željko now with the agencies. 
• NEO - will cut out some targets out that we are required to be able to detect. 
• re Astro2030 & "what to do with Rubin after 10 yrs": LSST Narrowband Filters, Yoachim et al. 2019

• Previous questions on contents of the alert packet were driven by the size of the alert packets and the number of brokers we might support - we now have committed to 7 full stream brokers. 
• No requirements changed yet on the AFS - we need to pick this up. Delegation to ANTARES  still means we will claim the AFS requirement - Eric/Leanne to pick this up 
• No need to provide pref-filtered streams to brokers. 
• 1 yr since discussion on  multi-resolution alerts. Brokers have done a study with ZTF - showed better classification of satellite glints, but not streaks, good paper from Fink/ZTF . Can use DR images to do larger classification - will this be fast/efficient enough. 
• Not yet clear that multi-resolution stamps is the only way to deal with the concerns or do the science they are concerned about. 
• Last broker technical workshop was late 2021 - many brokers have been busy with the elastic challenge  and working a lot with the ZTF infrastructure - this will be very instructive. 
• Will get more active engagement as we stand up the alert distribution system
• Retracting bad alerts - this is a different TN, remove  section delayed alerts from this TN