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SUMMARY:AGN in the La Silla QUEST Variability Survey
DTSTART;VALUE=DATE-TIME:20230628T094500Z
DTEND;VALUE=DATE-TIME:20230628T100000Z
DTSTAMP;VALUE=DATE-TIME:20260306T095415Z
UID:indico-contribution-812@cern.ch
DESCRIPTION:Speakers: Paolo Coppi (Yale University)\nThe La Silla QUEST (L
 SQ) supernova survey ran for 6 years on the ESO 1m Schmidt telescope at La
  Silla Chile\, using a large CCD array to replace the photographic plate o
 f the Schmidt. The survey imaged ~1000 degrees twice per night using a sin
 gle broad V band filter\, covering a total area of ~25\,000 square degrees
  from declination ~ -80 to +25 degrees. The survey magnitude limit is V~21
  in a single 60 second exposure\, with an average of ~200 visits for any g
 iven patch of sky and over one thousand square degrees of sky covered by m
 ore than 1000 visits. Systematic photometric errors from the current diffe
 rential photometry pipeline are at the 5-10 mmag level for bright point so
 urces on a good night\, with further improvements expected. The QUEST V fi
 lter can be absolutely calibrated against SDSS and PanSTARRS g+r data at t
 he percent level\, enabling LSQ\, for example\, to extend in time the SDSS
  Stripe 82 variability survey. Although principally designed to find super
 novae\, the strict survey cadence provides good logarithmic time coverage 
 on timescales from ~30 minutes to ~years\, ideal for probing AGN variabili
 ty and constraining\, for example\, the parameters of a Damped Random Walk
  model. We present some highlights of LSQ AGN science. The LSQ dataset sho
 uld prove useful as a training set to prepare for LSST. Over 1 million LSQ
 -selected AGN candidates will also be followed up by the upcoming ESO 4MOS
 T survey.\n\nhttps://indico.unina.it/event/61/contributions/812/
LOCATION:Centro Congressi Federico II Aula Magna
URL:https://indico.unina.it/event/61/contributions/812/
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