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The GALFA-HI Survey: Data Release 1

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arxiv 1101.1879 v2 pith:3TIAAMPT submitted 2011-01-10 astro-ph.GA astro-ph.IM

classification astro-ph.GAastro-ph.IM
keywords datagalfa-higalacticreleasesurveyarecibofirstfull
verification ladder T0 review T1 audit T2 compute T3 formal
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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.

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Cited by 3 Pith papers

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    astro-ph.GA 2026-07 conditional novelty 7.0 of 10

    First detection of DCN and DNC absorption in a Galactic translucent cloud shows deuterium fractionation ~100× higher than elemental D/H, challenging standard chemical models.

  2. HI envelope around the carbon star V420 Vul

    astro-ph.SR 2026-08 conditional novelty 6.0 of 10

    An extended ~20 pc HI structure around the carbon-rich Mira V420 Vul shows symmetric kinematics centered on the star, interpreted as a stellar wind imprint on a porous interstellar cloud.

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    astro-ph.GA 2026-06 unverdicted novelty 4.0 of 10

    HINSA observations show CRIR decreasing with H2 column density in both clouds, with IC 348 values an order of magnitude above NGC 1333, modeled as an order-of-magnitude difference in low-energy CR populations from loc...

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