HST and FUSE DADS retrievals will be down from Tuesday, September 2 through Wednesday Sept 3 for a DADS/OPUS installation. See list of alternative data sources.
During part of this time, the database will also be down and so searches will be down during that time (HLA and GALEX are unaffected by this downtime).
The Digitized Sky Survey comprises a set of all-sky photographic surveys in E, V, J, R, and N bands
conducted with the Palomar and UK Schmidt telescopes. The Catalogs and Surveys Branch (CASB)
is digitizing the photographic plates to support HST observing programs but also as a service to the astronomical community.
The 6.5-degree x 6.5-degree plates are scanned using a modified PDS microdensitometer to a pixel scale of
about 1.7 arcseconds per pixel for the POSS, SERC, and Palomar Quick-V surveys, and to about 1.0
arcseconds per pixel for the POSS-II surveys.
Images of any part of the sky may be extracted from the DSS, in either FITS or GIF format.
Search & Retrieval
