Extragalactic HI survey with FAST : First look of the pilot survey results
Jiangang Kang, Ming Zhu, Mei Ai, Haiyang Yu, Chun Sun

TL;DR
This paper presents the first data release from a pilot extragalactic HI survey using FAST, detecting 544 galaxies up to redshift 0.04, including 16 new HI sources without known counterparts, and providing a valuable catalog for future observations.
Contribution
It introduces the first data release of a pilot extragalactic HI survey with FAST, extending redshift coverage and identifying new HI sources.
Findings
Detected 544 extragalactic HI sources with S/N > 5.
Extended HI redshift range up to z = 0.04.
Discovered 16 HI sources without known galaxy counterparts.
Abstract
As first data release of a pilot extragalactic HI survey with Five-hundred-meter Aperture Spherical radio Telescope (FAST),we extracted 544 extragalaxies from three-dimensional(3D) spectral data to perform interactive searching and computing, yielding global parameters for these detections, extending redshift ranges of HI 21cm line up to z = 0.04 ,which covers part of the sky region in right ascension(R.A. or ) and declination(Dec or ) range and . The S/N of 544 HI detections are greater than 5 flagged with code 1 to 4 based on baseline qualities or RFI contamination. Besides, we find 16 of which without any counterparts in the existing galaxy catalogs. The catalog can give a guidence for the future HI observation with FAST.
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