Digital Sky Survey System (DSS)

Digital Sky Survey System (DSS)

This page give you access to the Canadian version of the Digitized Sky Survey ©, a survey of the complete sky digitized for the Hubble Space Telescope Project.

The following interfaces are available:

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 and JPG format if desired.

To begin an DSS search, select one of the queries in the DSS Queries Menu above.

Plates

The DSS/XDSS plates includes the following surveys:

Survey Code Colour Epoch Emulsion and filter Band Limiting magnitude Declination range Number of plates pixels GSC (1 or 2) DSS (1 or 2) Copyright
POSS-I E XE Red 1950-58 103aE Epg 20.0 +90:-30 936 1.0/1.7" 2 1 STScI
POSS-I O XO Blue 1950-58 103aO Opg 21.0 +90:-30 936 1.0" 2 2 STScI
Pal-QV N Blue 1983-85 IIaD +W12 Vpg (POSSII) 19.5 +90:+06 611 1.7" 1+2 2 STScI
POSS-II J XJ Blue 1987-98 IIIaJ +GG395 (POSSII) Jpg (POSSII) 22.5 +90:+00 897 1.0" 2 2 Caltech
POSS-II F XP Red 1987-98 IIIaF +RG610 Fpg (POSSII) 20.8 +90:+00 897 1.0" 2 2 Caltech
POSS-II N XI Near-IR 1987-02 IV-N +RG9 Ipg (POSSII) 19.5 +90:+00 890 1.0" 2 2 Caltech
SERC-J* S Blue 1975-87 IIIaJ +GG395 Jpg 23.0 -20:-90 606 1.7" 1+2 1 ROE
SERC-EJ S Blue 1979-88 IIIaJ +GG395 Jpg 23.0 -00:-15 288 1.7" 1+2 1 ROE
AAO-SES XS Red 1990-98 IIIaF +OG590 Fpg 22.0 -20:-90 606 1.0" 2 2 AAO
SERC-ER ER Red 1984-98 IIIaF +OG590 Fpg 22.0 -00:-15 288 1.0" 2 2 AAO/ROE
AAO-SR GR Red 1996-99 IIIaF +OG590 Fpg 22.0 S.Gal.plane 116 1.0" 2 2 AAO
SERC-I IS Near-IR 1990-02 IV-N +RG715 Ipg 19.5 -00:-90 894 1.0" 2 2 AAO
SERC-QV XV Blue 1986-88 IIaD +GG495 Vpg 14.0 S.Gal.plane 94 1.0/1.7" 1+2 1 ROE
SERC-V and PAL-V XX Blue 1979-85 IIIaJ +GG495 Vpg var. M31, LMC,SMC 4 1.7" 1+2 1 STScI/ROE

Copyright

Each sky-survey file provided by this network server is copyright under one of the provisions listed below. The specific copyright notice that is pertinent can be identified from the FITS header file.

The "Second Epoch Survey" of the southern sky was made by the Anglo-Australian Observatory (AAO) with the UK Schmidt Telescope. Plates from this survey have been digitized and compressed by the STScI. The digitized images are copyright © 1993-5 by the Anglo-Australian Observatory Board, and are distributed herein by agreement.

The "Equatorial Red Atlas" of the southern sky was made with the UK Schmidt Telescope. Plates from this survey have been digitized and compressed by the STScI. The digitized images are copyright © 1992-5, jointly by the UK SERC/PPARC (Particle Physics and Astronomy Research Council, formerly Science and Engineering Research Council) and the Anglo-Australian Telescope Board, and are distributed herein by agreement.

The compressed files of the "Palomar Observatory - Space Telescope Science Institute Digital Sky Survey" of the northern sky, based on scans of the Second Palomar Sky Survey are copyright © 1993-1995 by the California Institute of Technology and are distributed herein by agreement.

All material not subject to one of the above copyright provisions is copyright © 1995 by the Association of Universities for Research in Astronomy, Inc.

Produced under Contract No. NAS5-26555 with the National Aeronautics and Space Administration.