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J/ApJ/725/1792 Pi Ghz Sky Survey (PiGSS). I. (Bower+, 2010)
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Beginning of ReadMe :J/ApJ/725/1792 Pi Ghz Sky Survey (PiGSS). I. (Bower+, 2010)
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The Allen Telescope Array Pi GHz Sky Survey.
I. Survey description and static catalog results for the Bootes field.
Bower G.C., Croft S., Keating G., Whysong D., Ackermann R., Atkinson S.,
Backer D., Backus P., Barott B., Bauermeister A., Blitz L., Bock D.,
Bradford T., Cheng C., Cork C., Davis M., De Boer D., Dexter M., Dreher J.,
Engargiola G., Fields E., Fleming M., Forster R.J., Gutierrez-Kraybill C.,
Harp G.R., Heiles C., Helfer T., Hull C., Jordan J., Jorgensen S.,
Kilsdonk T., Law C., Van Leeuwen J., Lugten J., Macmahon D., Mcmahon P.,
Milgrome O., Pierson T., Randall K., Ross J., Shostak S., Siemion A.,
Smolek K., Tarter J., Thornton D., Urry L., Vitouchkine A., Wadefalk N.,
Weinreb S., Welch J., Werthimer D., Williams P.K.G., Wright M.
<Astrophys. J., 725, 1792-1804 (2010)>
=2010ApJ...725.1792B
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ADC_Keywords: Radio continuum ; Surveys
Keywords: radio continuum: galaxies - radio continuum: general -
radio continuum: stars - surveys
Abstract:
The Pi GHz Sky Survey (PiGSS) is a key project of the Allen Telescope
Array. PiGSS is a 3.1GHz 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 250000 radio sources in
the 10000deg^2^ region of the sky with b>30deg to an rms sensitivity
of 1mJy. 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 10deg^2^ region in the Bootes
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
250uJy. This represents a deeper image by a factor of 4-8 than we will
achieve over the entire 10000deg^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.
Description:
The Pi GHz Sky Survey (PiGSS) observing began with the radio telescope
ATA (Allen Telescope Array) in 2009 May. We report here on
observations between 2009 May 20 and 2009 September 27. A total of 96
observations of the Bootes field were obtained, of which 75 were
included in the final result.