Page tree


This space is obsolete and unmaintained.

Skip to end of metadata
Go to start of metadata
David's presentation on the verification datasets at the LSST2015 meeting.

Weekly Meeting

Wed 10-11am PT

Blue Jeans link: or

Meeting Agenda/Minutes


Run large precursor datasets through the stack “end-to-end” and manually inspect the results.  Treat them as if we were going to do science on them.
Want datasets to test the stack in regimes of four primary science drivers:
  • Dark Energy / Dark Matter
  • Solar System
  • Transients
  • Milky Way
Want datasets to test two main categories of data products:
  • Level 1, Alert Production (difference imaging, transients)
  • Level 2, Data Release Production (deep stacks, “static” sky)
Want datasets taken in different environments (e.g. crowded/sparse regions, good/bad seeing, etc.).
We need multiple datasets since no existing survey spans all these regimes the way LSST will.

The Datasets


All of the public raw and CP-reduced DECam data can be downloaded from the NOAO Science Archive.

COSMOS field, PI: Dey (PropID: 2013A-0351)

  • Deep (~26 AB mag), 3 sq. deg., ugrizY
  • ~1500 images
  • All public
  • Lots of existing datasets and catalogs for reference

Bulge survey, PI: Saha (PropID:2013A-0719)

  • ugriz, 6 fields
  • ~3500 shallow frames (~700 per field), ~3500 deep frames (~7000 per field)
  • Crowded field, looking for variables
  • All public

Solar system objects, PI: Allen (PropID: 2013A-0724, 2013B-0536)

  • Covering large area, looking for solar system objects
  • ~3900 60s r-band images public so far

HiTS survey, PI: Forster (PropID: 2014A-0608, 2015A-0608)

  • Difference imaging, transients, SNe
  • ~2800 images of 40 fields going public in 2015B (almost all g) and more in 2016B
  • ~100-150s exposures, most g (~7000) and r (~1000)
  • ~50 fields, ~30-40 epochs per field

SMASH survey, PI: Nidever (PropID:2013A-0411,2013B-0440)

  • Deep, ~24.5 mag, ugriz
  • 180 fields, ~30 frames per field
  • Magellanic Clouds and periphery
  • Crowded and sparse fields
  • Stripe82 data, useful reference field with good astrometry and photometry from SDSS
  • Eventually want to run the full dataset through the stack


CFHT Lensing Survey

  • Deep, ~25 mag, ugriz, 154 sq. deg
  • Good for weak lensing
  • To be run by our French colleagues at IN2P3 (Dominique Boutigny et al.)
  • The stack is already set up to run on CFHT data



  • Very good seeing, very deep (deeper than 10yr LSST)
  • Telescope/camera similar to LSST
  • Won't be publicly available until March 2016
  • The stack is already set up to run on HSC data

LSST Simulations

  • Still need to figure out what we want/need
  • But important to test that the stack is ready for LSST data

Twinkles Project

  • No labels