Astronomy and Astrophysics – Astrophysics
Scientific paper
1999-08-03
in `The Hy-Redshift Universe: galaxy formation and evolution at high redshift', eds. A. J. Bunker & W. J. M. van Breughel, ASP
Astronomy and Astrophysics
Astrophysics
4 pages, 1 double-panel figure, uses paspconf.sty. To appear in proceedings of `The Hy-redshift Universe', eds A. J. Bunker an
Scientific paper
Surveys of the distant Universe have been made using the SCUBA submillimeter(submm)-wave camera at the JCMT. 450- and 850-micron data is taken simultaneously by SCUBA in the same 5-square-arcmin field. Deep 850-micron counts of high-redshift dusty galaxies have been published; however, at 450 microns both the atmospheric transmission and antenna efficiency are lower, and the atmospheric noise is higher, and so only upper limits to the 450-micron counts have been reported so far. Here we apply the methods used by Blain et al. (1999) to derive deep 850-micron counts from SCUBA images of lensing clusters to the 450-micron images that were obtained in parallel, in which four sources were detected. We present the first 450-micron galaxy count. This analysis has only just become possible because the volume of data and the difficulty of calibration are both greater for the 450-micron array. In light of recent work, in which the identification of two of the galaxies in our sample was clarified, we also update our deep 850-micron counts.
Blain Andrew W.
Ivison Rob
Kneib Jean Paul
Smail Ian
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