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Journal article
HIGH-RESOLUTION VERY LARGE ARRAY IMAGING OF SLOAN DIGITAL SKY SURVEY STRIPE 82 AT 1.4 GHz
The Astronomical journal, v 142(1), pp 3-jQuery1323897497911='48'
01 Jul 2011
Abstract
We present a high-resolution radio survey of the Sloan Digital Sky Survey (SDSS) Southern Equatorial Stripe, a.k.a. Stripe 82. This 1.4 GHz survey was conducted with the Very Large Array primarily in the A-configuration, with supplemental B-configuration data to increase sensitivity to extended structure. The survey has an angular resolution of 1 ''.8 and achieves a median rms noise of 52 mu Jy beam(-1) over 92 deg(2). This is the deepest 1.4 GHz survey to achieve this large of an area, filling a gap in the phase space between small, deep and large, shallow surveys. It also serves as a pilot project for a larger high-resolution survey with the Expanded Very Large Array. We discuss the technical design of the survey and details of the observations, and we outline our method for data reduction. We present a catalog of 17,969 isolated radio components, for an overall source density of similar to 195 sources deg(-2). The astrometric accuracy of the data is excellent, with an internal check utilizing multiply observed sources yielding an rms scatter of 0 ''.19 in both right ascension and declination. A comparison to the SDSS DR7 Quasar Catalog further confirms that the astrometry is well tied to the optical reference frame, with mean offsets of 0 ''.02 +/- 0 ''.01 in right ascension, and 0 ''.01 +/- 0 ''.02 in declination. A check of our photometry reveals a small, negative CLEAN-like bias on the level of 35 mu Jy. We report on the catalog completeness, finding that 97% of FIRST-detected quasars are recovered in the new Stripe 82 radio catalog, while faint, extended sources are more likely to be resolved out by the resolution bias. We conclude with a discussion of the optical counterparts to the catalog sources, including 76 newly detected radio quasars. The full catalog as well as a search page and cutout server are available online at http://third.ucllnl.org/cgi-bin/stripe82cutout.
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Details
- Title
- HIGH-RESOLUTION VERY LARGE ARRAY IMAGING OF SLOAN DIGITAL SKY SURVEY STRIPE 82 AT 1.4 GHz
- Creators
- J. A. Hodge - Current address: Max Planck Institute for Astronomy, Königstuhl 17, 69117 Heidelberg, Germany.R. H. Becker - Lawrence Livermore National LaboratoryR. L. White - Space Telescope Science InstituteG. T. Richards - Drexel UniversityG. R. Zeimann - University of California, Davis
- Publication Details
- The Astronomical journal, v 142(1), pp 3-jQuery1323897497911='48'
- Publisher
- Iop Publishing Ltd
- Number of pages
- 17
- Grant note
- DE-AC52-07NA27344 / U.S. Department of Energy by Lawrence Livermore National Laboratory; United States Department of Energy (DOE) GSSP08-0034 / NRAO NAS5-26555 / Space Telescope Science Institute under NASA; Space Telescope Science Institute AST 00-98355 / National Science Foundation; National Science Foundation (NSF) HST-GO-10412.03-A / Hubble Space Telescope Alfred P. Sloan Research Fellowship; Alfred P. Sloan Foundation
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physics
- Web of Science ID
- WOS:000291584200003
- Scopus ID
- 2-s2.0-79959937343
- Other Identifier
- 991019169601804721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Astronomy & Astrophysics