Parkes Galactic All Sky Survey (GASS)
This map corresponds to the 21-cm emission from Galactic neutral Hydrogen
for the entire sky south of δ = +1° using the thirteen beam 20 cm
multibeam receiver on the Parkes Radio Telescope.
GASS covers all Milky Way velocities between LSR -400 km/s and 500 km/s.
The resolution of the map is 16' and the units are cm-2.
Healpix maps made by D. Paradis.
References
'GASS: The Parkes Galactic All-Sky Survey. Update: improved correction for instrumental effects and new data release, Kalberla and Haud, 2015, A&A, 578, 78 https://ui.adsabs.harvard.edu/abs/2015A%26A...578A..78K
'Gass: The Parkes Galactic All-Sky Survey. I. Survey Description, Goals, and Initial Data Release' by McClure-Griffiths et al, 2009, ApJS, 181, 398 http://adsabs.harvard.edu/abs/2009ApJS..181..398M
Map (in cm-2) (3rd release)
Uncertainty Map (in Jy)
HiPS
Enter the following URL in Aladin (“Files” then “Use directly a URL”):
http://cade.irap.omp.eu/documents/Ancillary/4Aladin/GASS