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Herschel-ATLAS: first data release of the Science Demonstration Phase source catalogues

Rigby, E. E., Maddox, S. J., Dunne, L., Negrello, M., Smith, D. J. B., González-Nuevo, J., Herranz, D., López-Caniego, M., Auld, Robbie Richard, Buttiglione, S., Baes, M., Cava, A., Cooray, A., Clements, D. L., Dariush, Aliakbar, De Zotti, G., Dye, Simon, Eales, Stephen Anthony, Frayer, D., Fritz, J., Hopwood, R., Ibar, E., Ivison, R. J., Jarvis, M., Panuzzo, P., Pascale, Enzo, Pohlen, Michael, Rodighiero, G., Serjeant, S., Temi, P. and Thompson, M. A. 2011. Herschel-ATLAS: first data release of the Science Demonstration Phase source catalogues. Monthly Notices of the Royal Astronomical Society 415 (3) , pp. 2336-2348. 10.1111/j.1365-2966.2011.18864.x

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Abstract

The Herschel Astrophysical Terahertz Large Area Survey (Herschel-ATLAS) is a survey of 550 deg2 with the Herschel Space Observatory in five far-infrared and submillimetre bands. The first data for the survey, observations of a field 4 × 4 deg2 in size, were taken during the Science Demonstration Phase (SDP), and reach a 5σ noise level of 33.5 mJy beam−1 at 250 μm. This paper describes the source extraction methods used to create the corresponding SDP catalogue, which contains 6876 sources, selected at 250 μm, within ∼14 deg2. Spectral and Photometric Imaging REciever (SPIRE) sources are extracted using a new method specifically developed for Herschel data and Photodetector Array Camera and Spectrometer (PACS) counterparts of these sources are identified using circular apertures placed at the SPIRE positions. Aperture flux densities are measured for sources identified as extended after matching to optical wavelengths. The reliability of this catalogue is also discussed, using full simulated maps at the three SPIRE bands. These show that a significant number of sources at 350 and 500 μm have undergone flux density enhancements of up to a factor of ∼2, due mainly to source confusion. Correction factors are determined for these effects. The SDP data set and corresponding catalogue will be available from http://www.h-atlas.org.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Uncontrolled Keywords: methods: data analysis; catalogues; surveys; galaxies: general; submillimetre: galaxies
Additional Information: Pdf uploaded in accordance with publisher's policy at http://www.sherpa.ac.uk/romeo/issn/0035-8711/ (accessed 20/02/2014).
Publisher: Royal Astronomical Society
ISSN: 0035-8711
Date of First Compliant Deposit: 30 March 2016
Last Modified: 04 Jun 2017 03:15
URI: http://orca-mwe.cf.ac.uk/id/eprint/18961

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