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SUMMARY:Cosmology with quasars in Kilo-Degree Survey
DTSTART;VALUE=DATE-TIME:20261020T130500Z
DTEND;VALUE=DATE-TIME:20261020T132000Z
DTSTAMP;VALUE=DATE-TIME:20261112T103450Z
UID:indico-contribution-2266@events.ncbj.gov.pl
DESCRIPTION:Speakers: Szymon Nakoneczny (CFT PAN)\nI will present my curre
 nt work on cosmological inference with quasars (QSOs) from the Kilo-Degree
  Survey (KiDS). In both the classification and the photometric redshift (p
 hoto-z) steps\, I test how far the models can be extrapolated beyond the c
 overage of the spectroscopic training data\, and how the resulting errors 
 propagate into the cosmological constraints. I compare ML methods for unce
 rtainty estimation in QSO photo-z\, and describe the calibration of the cl
 assification and photo-z results with self-organising maps (SOMs). Finally
 \, I present preliminary constraints from the KiDS QSO samples\, obtained 
 with tomographic binning in photo-z. Both the methods and the results carr
 y over directly to LSST\, which will deliver quasar samples that are large
 r and deeper\, but even less well covered by spectroscopic training data.\
 n\nhttps://events.ncbj.gov.pl/event/502/contributions/2266/
LOCATION:
URL:https://events.ncbj.gov.pl/event/502/contributions/2266/
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