查看“HI巡天”的源代码

==Blind Survey==

===HIPASS===
*The HI Parkes All-Sky Survey (HIPASS) covered 30000 deg2 and produced a final catalog of around 5000 HI detections with a median redshift of 2800 km/s.

===ALFALFA===
*Arecibo Legacy Fast ALFA Survey (ALFALFA) will map 7000 deg2 and is expected to detect more than 25,000 extragalactic HI line sources out to redshifts of 18,000 km/s.
:*the spatial resolution of the grid to 4.3'x3.8'
:*spectral velocity resolution is 11 km/s after smoothing is applied,
* Catalog [https://arxiv.org/abs/2011.02588]
* data webpage [http://egg.astro.cornell.edu/alfalfa/data/index.php]

==Galaxy==

===AGES===
*Arecibo Galaxy Environment Survey (AGES), will cover a total area of 200 deg2 (divided into 13 predesignated regions to sample different environments) to greater depth

===THINGS===
*The H I Nearby Galaxy Survey (THINGS)," a high spectral (≤5.2 km s–1) and spatial (~6) resolution survey of H I emission in 34 nearby galaxies obtained using the NRAO Very Large Array (VLA).
*public data [http://www.mpia.de/THINGS/Data.html]

===NIBLES===
*Nançay Interstellar Baryons Legacy Extragalactic Survey  (NanCay Radio Telescop 100m)
#Must have both SDSS magnitudes and optical spectrum;
#Must lie within the [[local volume]] (900<cz<12,000 km s−1);
#Uniform sampling of each 0.5 magnitude wide bin in absolute z-band magnitude, Mz;
#Preferentially observe nearby objects;
#No a priori selection on color.
*这种on source的观测比ALFALFA这种盲测的好更高信噪比，但是还是有一些星系用了Arecibo做了follow up的定点观测，灵敏度更高，可以到mJy以下，(可以探测Lr < 10^8.5的蓝星系)。参见[http://arxiv.org/abs/1609.06242]