THE ALLEN TELESCOPE ARRAY Pi GHz SKY SURVEY. I. SURVEY DESCRIPTION AND STATIC CATALOG RESULTS FOR THE BOOeTES FIELD

The 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 w...

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Bibliographic Details
Published in:The Astrophysical journal 2010-12, Vol.725 (2)
Main Authors: Bower, Geoffrey C., Croft, Steve, Keating, Garrett, Whysong, David, Backer, Don, Bauermeister, Amber, Blitz, Leo, Bock, Douglas, Cheng, Calvin, Dexter, Matt, Engargiola, Greg, Ackermann, Rob, Atkinson, Shannon, Backus, Peter, Bradford, Tucker, Davis, Mike, Dreher, John, Barott, Billy, Cork, Chris, DeBoer, Dave
Format: Article
Language:English
Subjects:
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
DOCUMENT TYPES
FLUX DENSITY
GALAXIES
SENSITIVITY
STARS
TELESCOPES
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Summary:The 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 {approx}250,000 radio sources in the 10,000 deg{sup 2} region of the sky with b>30{sup 0} to an rms sensitivity of {approx}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 deg{sup 2} region in the Booetes 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 {mu}Jy. This represents a deeper image by a factor of 4-8 than we will achieve over the entire 10,000 deg{sup 2}. We provide flux densities, source sizes, and spectral indices for the 425 sources detected in the image. We identify {approx}100 new flat-spectrum radio sources; we project that when completed PiGSS will identify 10{sup 4} 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.
ISSN:0004-637X
1538-4357
DOI:10.1088/0004-637X/725/2/1792