THE GALFA-HI SURVEY: DATA RELEASE 1

Journal Article · Wed Jun 01 00:00:00 EDT 2011 · Astrophysical Journal, Supplement Series

DOI:https://doi.org/10.1088/0067-0049/194/2/20· OSTI ID:21560386

Peek, J E. G.; Grcevich, Jana; Putman, M E; Saul, Destry ^[1]; Heiles, Carl ^[2]; Douglas, Kevin A ^[3]; Lee, Min-Young; Stanimirovic, Snezana; Begum, Ayesha ^[4]; Korpela, Eric J ^[5]; Gibson, Steven J ^[6]; Robishaw, Timothy ^[7]; Krco, Marko ^[8]

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1. Department of Astronomy, Columbia University, New York, NY 10027 (United States)
2. Radio Astronomy Lab, UC Berkeley, 601 Campbell Hall, Berkeley, CA 94720 (United States)
3. School of Physics, University of Exeter, Stocker Road, Exeter, EX4 4QL (United Kingdom)
4. Department of Astronomy, University of Wisconsin, Madison, 475 North Charter Street, Madison, WI 53703 (United States)
5. Space Sciences Laboratory, University of California, Berkeley, CA 94720 (United States)
6. Department of Physics and Astronomy, Western Kentucky University, Bowling Green, KY 42101 (United States)
7. Sydney Institute for Astronomy, School of Physics, University of Sydney, NSW 2006 (Australia)
8. Department of Astronomy, Cornell University, Ithaca, NY 14853 (United States)

We present the Galactic Arecibo L-Band Feed Array H I (GALFA-H I) survey and its first full data release (DR1). GALFA-H I is a high-resolution ({approx}4'), large-area (13,000 deg{sup 2}), high spectral resolution (0.18 km s{sup -1}), and wide band (-700 km s {sup -1} < v{sub LSR} < +700 km s{sup -1}) survey of the Galactic interstellar medium in the 21 cm line hyperfine transition of neutral hydrogen conducted at Arecibo Observatory. Typical noise levels are 80 mK rms in an integrated 1 km s{sup -1} channel. GALFA-H I is a dramatic step forward in high-resolution, large-area Galactic H I surveys, and we compare GALFA-H I to past, present, and future Galactic H I surveys. We describe in detail new techniques we have developed to reduce these data in the presence of fixed pattern noise, gain variation, and inconsistent beam shapes, and we show how we have largely mitigated these effects. We present our first full data release, covering 7520 deg{sup 2} of sky and representing 3046 hr of integration time, and discuss the details of these data.

• OSTI ID: 21560386
• Journal Information: Astrophysical Journal, Supplement Series, Vol. 194, Issue 2; Other Information: DOI: 10.1088/0067-0049/194/2/20; ISSN 0067-0049
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
DATA ANALYSIS
GAIN
GALAXIES
HYDROGEN
NOISE
VARIATIONS
AMPLIFICATION
ELEMENTS
NONMETALS