The United Kingdom Infrared Telescope Infrared Deep Sky Survey First Data Release |
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| Affiliation: | Astrophysics Group, Imperial College London, Blackett Laboratory, Prince Consort Road, London SW7 2AZ;Scottish Universities Physics Alliance, Institute for Astronomy, University of Edinburgh, Royal Observatory Edinburgh, Blackford Hill, Edinburgh EH9 3HJ;School of Physics &Astronomy, Cardiff University, Queens Buildings, The Parade, Cardiff CF24 3AA;School of Physics and Astronomy, University of Nottingham, University Park, Nottingham NG7 2RD;Department of Physics, Durham University, South Road, Durham DH1 3LE;Institute of Astronomy, Madingley Road, Cambridge CB3 0HA;Department of Physics and Astronomy, University of Leicester, Leicester LE1 7RH;Centre for Astrophysics Research, Science and Technology Research Institute, University of Hertfordshire, Hatfield AL10 9AB;Joint Astronomy Centre, 660 N. A'ohoku Place, University Park, Hilo, HI 96720, USA;Department of Astronomy, University of Florida, 211 Bryant Space Science Centre, Gainesville, FL 32611, USA;Astronomy Unit, School of Mathematical Sciences, Queen Mary, University of London, Mile End Road, London E1 4NS;Department of Physics, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH;Astrophysics Research Institute, Liverpool John Moores University, Twelve Quays House, Egerton Wharf, Birkenhead CH41 1LD |
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| Abstract: | The First Data Release (DR1) of the United Kingdom Infrared Telescope Infrared Deep Sky Survey (UKIDSS) took place on 2006 July 21. The UKIDSS is a set of five large near-infrared surveys, covering a complementary range of areas, depths and Galactic latitudes. The DR1 is the first large release of survey-quality data from the UKIDSS and includes 320 deg2 of multicolour data to (Vega) K = 18 , complete (depending on the survey) in three to five bands from the set ZYJHK , together with 4 deg2 of deep JK data to an average depth K = 21 . In addition, the release includes a similar quantity of data with incomplete filter coverage. In JHK , in regions of low extinction, the photometric uniformity of the calibration is better than 0.02 mag in each band. The accuracy of the calibration in ZY remains to be quantified, and the same is true of JHK in regions of high extinction. The median image full width at half-maximum across the data set is 0.82 arcsec. We describe changes since the Early Data Release in the implementation, pipeline and calibration, quality control, and archive procedures. We provide maps of the areas surveyed, and summarize the contents of each of the five surveys in terms of filters, areas and depths. The DR1 marks completion of 7 per cent of the UKIDSS seven-year goals. |
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| Keywords: | astronomical data bases: miscellaneous surveys infrared: general |
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