The very bright SCUBA galaxy count: looking for SCUBA galaxies with the Mexican Hat Wavelet

Details The very bright SCUBA galaxy count: looking for SCUBA galaxies with the Mexican Hat Wavelet The very bright SCUBA galaxy count: looking for SCUBA galaxies with the Mexican Hat Wavelet

2004-05-07

arxiv.org/abs/astro-ph/0405156v1

Mon.Not.Roy.Astron.Soc. 352 (2004) 961

Astronomy and Astrophysics

Astrophysics

Accepted by MNRAS

Scientific paper

10.1111/j.1365-2966.2004.07985.x

We present the results of a search for bright high-redshift galaxies in two large SCUBA scan-maps of Galactic regions. A Mexican Hat Wavelet technique was used to locate point sources in these maps, which suffer high foreground contamination as well as typical scan-map noise signatures. A catalogue of point source objects was selected and observed again in the submillimetre continuum, and in HCO+ (3->2) at zero redshift to rule out Galactic sources. No extragalactic sources were found. Simulations show that the survey was sensitive to sources with fluxes > 50 mJy, depending on the local background. These simulations result in upper limits on the 850-micron counts of SCUBA galaxies of 53 per square degree at 50 mJy and 2.9 per square degree at 100 mJy.

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