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The Allen Telescope Array Pi GHz Sky Survey I. Survey Description and Static Catalog Results for the Boötes Field

Bower, Geoffrey C. and Weinreb, Sandy (2010) The Allen Telescope Array Pi GHz Sky Survey I. Survey Description and Static Catalog Results for the Boötes Field. Astrophysical Journal, 725 (2). pp. 1792-1804. ISSN 0004-637X. https://resolver.caltech.edu/CaltechAUTHORS:20191007-143435352

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Abstract

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 ~250,000 radio sources in the 10,000 deg^2 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 deg^2 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 deg^2. 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.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1088/0004-637X/725/2/1792DOIArticle
https://arxiv.org/abs/1009.4443arXivDiscussion Paper
ORCID:
AuthorORCID
Bower, Geoffrey C.0000-0003-4056-9982
Additional Information:© 2010 The American Astronomical Society. Received 2010 July 9; accepted 2010 September 21; published 2010 December 2. The authors acknowledge the generous support of the Paul G. Allen Family Foundation, which has provided major support for design, construction, and operations of the ATA. Contributions from Nathan Myhrvold, Xilinx Corporation, Sun Microsystems, and other private donors have been instrumental in supporting the ATA. The ATA has been supported by contributions from the US Naval Observatory in addition to National Science Foundation grants AST-050690, AST-0838268, and AST-0909245. We dedicate this paper to the memory of the late Don Backer: mentor, colleague, and friend.
Funders:
Funding AgencyGrant Number
Paul G. Allen Family FoundationUNSPECIFIED
Nathan MyhrvoldUNSPECIFIED
Xilinx CorporationUNSPECIFIED
Sun MicrosystemsUNSPECIFIED
U.S. Naval ObservatoryUNSPECIFIED
NSFAST-050690
NSFAST-0838268
NSFAST-0909245
Subject Keywords:radio continuum: galaxies – radio continuum: general – radio continuum: stars – surveys
Issue or Number:2
Record Number:CaltechAUTHORS:20191007-143435352
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20191007-143435352
Official Citation:Geoffrey C. Bower et al 2010 ApJ 725 1792
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:99124
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:07 Oct 2019 22:16
Last Modified:09 Mar 2020 13:18

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