We describe the generation of single-band point source catalogues from submillimetre Herschel-SPIRE observations taken as part of the Science Demonstration Phase of the Herschel Multi-tiered Extragalactic Survey (HerMES). Flux densities are found by means of peak-finding and the fitting of a Gaussian point-response function. With highly-confused images, careful checks must be made on the completeness and flux density accuracy of the detected sources. This is done by injecting artificial sources into the images and analysing the resulting catalogues. Measured flux densities at which 50 per cent of injected sources result in good detections at (250, 350, 500) {\mu}m range from (11.6, 13.2, 13.1) mJy to (25.7, 27.1, 35.8) mJy, depending on the depth of the observation (where a `good' detection is taken to be one with positional offset less than one full-width half-maximum of the point-response function, and with the measured flux density within a factor of 2 of the flux density of the injected source). This paper acts as a reference for the 2010 July HerMES public data release.
@article{arxiv.1109.5186,
title = {HerMES: point source catalogues from deep Herschel-SPIRE observations},
author = {A. J. Smith and L. Wang and S. J. Oliver and R. Auld and J. Bock and D. Brisbin and D. Burgarella and P. Chanial and E. Chapin and D. L. Clements and L. Conversi and A. Cooray and C. D. Dowell and S. Eales and D. Farrah and A. Franceschini and J. Glenn and M. Griffin and R. J. Ivison and A. M. J. Mortier and M. J. Page and A. Papageorgiou and C. P. Pearson and I. Pérez-Fournon and M. Pohlen and J. I. Rawlings and G. Raymond and G. Rodighiero and I. G. Roseboom and M. Rowan-Robinson and R. Savage and Douglas Scott and N. Seymour and M. Symeonidis and K. E. Tugwell and M. Vaccari and I. Valtchanov and L. Vigroux and R. Ward and G. Wright and M. Zemcov},
journal= {arXiv preprint arXiv:1109.5186},
year = {2015}
}
Comments
15 pages, 6 figures, accepted for publication in MNRAS. For associated data release, see http://hedam.oamp.fr/HerMES