THE GALFA-Hi SURVEY: DATA RELEASE 1

By Joshua E. G. Peek, C. Heiles, K. Douglas, Min-Young Lee, J. Grcevich, S. Stanimirović, M. Putman, E. Korpela, S. Gibson, A. Begum and 3 more. 2011

176 citations recorded by the source corpus.

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 (∼4′), large-area (13,000 deg2), high spectral resolution (0.18 km s-1), and wide band (−700 km s−1 < vLSR < +700 km s-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-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 deg2 of sky and representing 3046 hr of integration time, and discuss the details of these data.

Subfields: Astronomy and Astrophysics

View Paper: https://www.semanticscholar.org/paper/dd2454dd2fdf282ce2639570945f5ab1a9c85d7f

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In Astronomy and Astrophysics

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Citations in the corpus

• The Effelsberg-Bonn H i Survey: Milky Way gas - First data release (2015, background): “Another recent project is the GALFA-HI survey (Peek et al. 2011) currently going on with the Arecibo 300-m dish.”
• HI4PI: a full-sky H i survey based on EBHIS and GASS (2016, methodology): “Most recently, the GALFA-HI survey (Peek et al. 2011) was initiated exploiting the huge 300-m Arecibo dish and state-ofthe-art spectrometers (δ3 = 0.2 km s−1).”
• A Herschel [C ii] Galactic plane survey - I. The global distribution of ISM gas components (2013, background): “(Peek et al. 2011) to cover the Galactic longitude range between 180◦ < l <212◦.”
• Gravitational probes of dark matter physics (2017, background): “Intensity mapping [486] & radio galaxy surveys [487] CHIME [488] SPHEREx(15) [489] SKA and its pathfinders(16) FIGGS [490] GALFA-HI [491] SHIELD [492] Giant optical telescopes Extremely Large Telescope (ELT)(17) Giant Magellan Telescope (GMT) 18 Thirty Meter Telescope (TMT) 19”