Welcome to the GALFA-HI Survey's presence on the web!

The Galactic Arecibo L-band Feed Array HI (GALFA-HI) Survey is observing neutral hydrogen in and around our Milky Way Galaxy with the Arecibo 305 meter telescope.  We are a part of the GALFA consortium and observe in both solo modes and commensally with ALFALFA, AGES and GALFACTS as the TOGS and TOGS2 projects.  The GALFA-HI Survey will cover 13,000 sq. deg. on completion, at a resolution of 4' and channel spacing of 0.18 km/s.  All of the data are made public in cube form at, https://purcell.ssl.berkeley.edu/.

YouTube Video


A 40 degree x 30 degree section of the DR1 data toward RA = 20 deg, Dec = 15 deg

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Support for the GALFA-HI survey has been provided by the National Science Foundation through multiple awards.