Time and Venue: Wednesday 8th September 2021, via Zoom
Attendees: Andy Lawrence, Roy Williams, Terry Sloan, Cosimo Inserra, Stephen Smartt, Sara Casewell, Dave Young, Micheal Fulton, Julien Peloton, Ken Smith, Jakob Nordin, Gareth Francis, Matt Nicholl, Eric C Bellm, Stelios Voutsinas, Meg Schwamb,
Apologies:
Notes from discussion
Session-1: Overviews
Welcomes (AndyL)
Please use the Zoom Chat discussion. This will be saved at the end of meeting.
Code of Conduct reminder
Meeting contacts are AndyL and SaraC
LSST:UK context (Stephen Smartt)
Hope to get funded in Phase C but this will not count towards in-kind. It will however support other UK work that does count towards in-kind.
Spectra information inclusion is increasingly important. UK in a strong position.
The spectrograph of particular note to Lasair is 4MOST, the spectrograph for the VISTA telescope. TiDES is the part of the 4MOST survey focused on transients.
Lasair long term plan (Andy Lawrence)
Today’s meeting primarily concerned with the revised 4 year plan for the remainder of phase B.
Issues from today will noted and fed into the plan.
Overall LSST:UK phases have not changed relative to the Rubin schedule.
Current Cycle 4 of the Lasair plan is taking stock prior to build.
Key change - original plan was ZTF prototype would be frozen at V2 however further ZTF development has continued.
Overall Lasair architecture now believed to be set.
A number of key technology changes including assuming that users will be using Google Colab.
1325: Discussion
Cosimo Q - for stepehn regarding sptrosctopic addition to Lasair but confused about the various projects. 4most tides does not do targetted opportunities. So it might 20 to 100 days after the LSST discusovery. Can understand how SOXS can be contributebut not so much 4MOST/ So how much can these spectra actually controibute
SS - correct 4MOST cannot control the poiniting but likley to follow the LSST footprints. Can control the fibre poiting withing the fields of 4MOST. any thing brighter that 22 in the foiedl of 4MOST will have a fiber put on it. Speatra oif 20K to 30K transiernts plus 30K host glaxies. Cannot control exactly when that will be. challenge is to get onkjctes out of alrte stream and onto the the 4MOST schedule. If can put the fiber on them then when an object is 4MOST obesvered, the then UK WP will reconginsed fiber is place, make esitamate and the information will go back to LAsair as a annotation. All of the data will be public in ESO archives. We will get information back asap into the broker.
Cosim Q - do you plan the same same thing for SOXS.
SJS - yes, there will be some link from Lasairt
Jakob Q - How well defined is the UK programme . Have the spectra discussed what they require in terms of triggering from LSST?
SJS - yes these discussions are happending at cocneptaual level. Triger are classsified as supernovae by sherlock( not an agn, not a variable star…). Essentially if bright enough for 4MOST to take a spectra then put a fibre on it.
Jokob - sounds like UK will only do supernvoa?
SJS - actually mean extragalactic transients
Juliem Q - Hardwar funding for Lasair - is this secured?
SJS - will be discussed in afternoon. Top level funding is secured. Lasair is a small part of the UK computing. LSSTUK is a small part of UK IRIS. So overall we are not the dominant partner and hence believe Lasair is safe. Andy agrees. Plan of UK expected requirements being put in to UKRI for the 10 years. This includes Lasair
Session-2: ZTF prototype experience (chair: Stephen Smartt)
1335: Lasair-ZTF and how it works (Roy Williams)
1345: Science experience with ZTF (Matt Nicholl)
1355: Differences between ZTF and LSST (Eric Bellm)
1405: Discussion