HI4PI

The HI4PI survey is an all-sky HI survey, based on data from the Effelsberg-Bonn HI survey (EHBIS) and from the third revision of the Parkes Galactic All-Sky Survey (GASS). The EHBIS map (10.8') has been smoothed to match the angular resolution of the GASS map (16.2'). The resulting Healpix map has an angular resolution of 16.2'. Units are cm-2.

Reference

'HI4PI: A full-sky H I survey based on EBHIS and GASS' by HI4PI Collaboration, 2016, A&A, 594, 116 http://adsabs.harvard.edu/abs/2016A%26A...594A.116H

Map

GASS+EHBIS_1_1024.fits

Original WCS Data