NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
The Einstein Observatory Extended Medium-Sensitivity Survey. I - X-ray data and analysisThis paper presents the results of the analysis of the X-ray data and the optical identification for the Einstein Observatory Extended Medium-Sensitivity Survey (EMSS). The survey consists of 835 serendipitous sources detected at or above 4 times the rms level in 1435 imaging proportional counter fields with centers located away from the Galactic plane. Their limiting sensitivities are about (5-300) x 10 to the -14th ergs/sq cm sec in the 0.3-3.5-keV energy band. A total area of 778 square deg of the high-Galactic-latitude sky has been covered. The data have been analyzed using the REV1 processing system, which takes into account the nonuniformities of the detector. The resulting EMSS catalog of X-ray sources is a flux-limited and homogeneous sample of astronomical objects that can be used for statistical studies.
Document ID
19900041511
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Gioia, I. M.
(Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Maccacaro, T.
(Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Schild, R. E.
(Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Wolter, A.
(Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Stocke, J. T.
(Colorado, University Boulder, United States)
Date Acquired
August 14, 2013
Publication Date
March 1, 1990
Publication Information
Publication: Astrophysical Journal Supplement Series
Volume: 72
ISSN: 0067-0049
Subject Category
Astrophysics
Accession Number
90A28566
Funding Number(s)
CONTRACT_GRANT: NSF AST-86-15631
CONTRACT_GRANT: NAG8-658
CONTRACT_GRANT: NAG8-442
CONTRACT_GRANT: NAS8-30751
CONTRACT_GRANT: NSF AST-87-15983
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available