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The VLT Survey Telescope ATLAS

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Original languageEnglish
Pages (from-to)4238-4252
Number of pages15
JournalMonthly Notices of the Royal Astronomical Society
Issue number4
Early online date30 Jun 2015
Publication statusPublished - 21 Aug 2015


The VLT Survey Telescope (VST) ATLAS is an optical ugriz survey aiming to cover ~4700deg^2 of the Southern sky to similar depths as the Sloan Digital Sky Survey (SDSS). From reduced images and object catalogues provided by the Cambridge Astronomical Surveys Unit we first find that the median seeing ranges from 0.8 arcsec FWHM in i to 1.0 arcsec in u, significantly better than the 1.2-1.5 arcsec seeing for SDSS. The 5 sigma magnitude limit for stellar sources is r_AB=22.7 and in all bands these limits are at least as faint as SDSS. SDSS and ATLAS are more equivalent for galaxy photometry except in the z band where ATLAS has significantly higher throughput. We have improved the original ESO magnitude zeropoints by comparing m

    Research areas

  • astro-ph.GA, astro-ph.CO

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