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The Arecibo Legacy Fast ALFA Survey: VIII. HI source catalog of the Anti-Virgo region at δ = +25°


Martin, A M; Giovanelli, R; Haynes, M P; Saintonge, A; Hoffman, G L; Kent, B R; Stierwalt, S (2009). The Arecibo Legacy Fast ALFA Survey: VIII. HI source catalog of the Anti-Virgo region at δ = +25°. Astrophysical Journal Supplement Series, 183(2):214-224.

Abstract

We present a fourth catalog of H I sources from the Arecibo Legacy Fast ALFA (ALFALFA) Survey. We report 541 detections over 136 deg2, within the region of the sky having 22h < α < 03h and 24° < δ < 26°. This complements a previous catalog in the region 26° < δ < 28°. We present here the detections falling into three classes: (1) extragalactic sources with signal-to-noise ratio (S/N)>6.5, where the reliability of the catalog is better than 95%; (2) extragalactic sources 5.0 < S/N < 6.5 and a previously measured optical redshift that corroborates our detection; or (3) High Velocity Clouds (HVCs), or subcomponents of such clouds, in the periphery of the Milky Way. Of the 541 objects presented here, 90 are associated with HVCs, while the remaining 451 are identified as extragalactic objects. Optical counterparts have been matched with all but one of the extragalactic objects.

We present a fourth catalog of H I sources from the Arecibo Legacy Fast ALFA (ALFALFA) Survey. We report 541 detections over 136 deg2, within the region of the sky having 22h < α < 03h and 24° < δ < 26°. This complements a previous catalog in the region 26° < δ < 28°. We present here the detections falling into three classes: (1) extragalactic sources with signal-to-noise ratio (S/N)>6.5, where the reliability of the catalog is better than 95%; (2) extragalactic sources 5.0 < S/N < 6.5 and a previously measured optical redshift that corroborates our detection; or (3) High Velocity Clouds (HVCs), or subcomponents of such clouds, in the periphery of the Milky Way. Of the 541 objects presented here, 90 are associated with HVCs, while the remaining 451 are identified as extragalactic objects. Optical counterparts have been matched with all but one of the extragalactic objects.

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Additional indexing

Other titles:The Arecibo Legacy Fast ALFA Survey: VIII. HI Source Catalog of the Anti-Virgo Region at dec = +25 deg
Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Institute for Computational Science
Dewey Decimal Classification:530 Physics
Language:English
Date:August 2009
Deposited On:25 Feb 2010 18:14
Last Modified:05 Apr 2016 13:56
Publisher:Institute of Physics Publishing
ISSN:0067-0049
Funders:NSF [AST-0607007, AST-9397661], National Defense Science and Engineering Graduate (NDSEG), Brinson Foundation, Alfred P. Sloan Foundation, National Science Foundation
Publisher DOI:10.1088/0067-0049/183/2/214
Related URLs:http://arxiv.org/abs/0906.2181
Permanent URL: http://doi.org/10.5167/uzh-30873

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