The GALFA-HI Survey: Data Release 1
| Autor: | Kevin A. Douglas, Destry Saul, Marko Krčo, Steven J. Gibson, Jana Grcevich, Ayesha Begum, Joshua E. G. Peek, Mary E. Putman, Carl Heiles, Snezana Stanimirovic, Min-Young Lee, Timothy Robishaw, Eric J. Korpela |
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| Jazyk: | angličtina |
| Rok vydání: | 2011 |
| Předmět: |
Physics
010308 nuclear & particles physics media_common.quotation_subject Fixed-pattern noise FOS: Physical sciences Astronomy and Astrophysics Astrophysics 01 natural sciences Astrophysics - Astrophysics of Galaxies Galaxy Interstellar medium 13. Climate action Space and Planetary Science Sky Astrophysics of Galaxies (astro-ph.GA) 0103 physical sciences Arecibo Observatory Spectral resolution Astrophysics - Instrumentation and Methods for Astrophysics 010303 astronomy & astrophysics Instrumentation and Methods for Astrophysics (astro-ph.IM) Noise (radio) Line (formation) media_common |
| Popis: | We present the Galactic Arecibo L-Band Feed Array HI (GALFA-HI) survey, and its first full data release (DR1). GALFA-HI is a high resolution (~ 4'), large area (13000 deg^2), high spectral resolution (0.18 km/s), wide band (-700 < v_LSR < +700 km/s) 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 channel. GALFA-HI is a dramatic step forward in high-resolution, large-area Galactic HI surveys, and we compare GALFA-HI to past, present, and future Galactic HI 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 square degrees of sky and representing 3046 hours of integration time, and discuss the details of these data. Accepted to the ApJS |
| Databáze: | OpenAIRE |
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