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AuthorsG.C. Bower, S. Croft, G. Keating, D. Whysong, R. Ackermann, S. Atkinson, D. Backer, P. Backus, B. Barott, A. Bauermeister, L. Blitz, D. Bock, T. Bradford, C. Cheng, C. Cork, M. Davis, D. DeBoer, M. Dexter, J. Dreher, G. Engargiola, E. Fields, M. Fleming, R.J. Forster, C. Gutierrez-Kraybill, G.R. Harp, C. Heiles, T. Helfer, C. Hull, J. Jordan, S. Jorgensen, T. Kilsdonk, C. Law, J. van Leeuwen, J. Lugten, D. MacMahon, P. McMahon, O. Milgrome, T. Pierson, K. Randall, J. Ross, S. Shostak, A. Siemion, K. Smolek, J. Tarter, D. Thornton, L. Urry, A. Vitouchkine, N. Wadefalk, S. Weinreb, J. Welch, D. Werthimer, P.K.G. Williams, M. Wright
TitleThe Allen Telescope Array Pi GHz Sky Survey. I. Survey description and static catalog results for the Boötes field
JournalAstrophysical Journal
Volume725
Year2010
Issue2
Pages1792-1804
ISSN0004637X
FacultyFaculty of Science
Institute/dept.FNWI: Astronomical Institute Anton Pannekoek (IAP)
AbstractThe Pi GHz Sky Survey (PiGSS) is a key project of the Allen Telescope Array. PiGSS is a 3.1 GHz survey of radio continuum emission in the extragalactic sky with an emphasis on synoptic observations that measure the static and time-variable properties of the sky. During the 2.5 year campaign, PiGSS will twice observe ~250,000 radio sources in the 10,000 deg2 region of the sky with b>30° to an rms sensitivity of ~1 mJy. Additionally, sub-regions of the sky will be observed multiple times to characterize variability on timescales of days to years. We present here observations of a 10 deg2 region in the Boötes constellation overlapping the NOAO Deep Wide Field Survey field. The PiGSS image was constructed from 75 daily observations distributed over a 4 month period and has an rms flux density between 200 and 250 μJy. This represents a deeper image by a factor of 4-8 than we will achieve over the entire 10,000 deg2. We provide flux densities, source sizes, and spectral indices for the 425 sources detected in the image. We identify ~100 new flat-spectrum radio sources; we project that when completed PiGSS will identify 104 flat-spectrum sources. We identify one source that is a possible transient radio source. This survey provides new limits on faint radio transients and variables with characteristic durations of months.
Document typeArticle
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