NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
The medium sensitivity survey - A new sample of X-ray sources with optical identifications and the revised extragalactic log N-log SMaccacaro et al. (1982) surveyed approximately 50 sq deg in different regions of the sky at medium sensitivity flux levels intermediate between the Uhuru/Ariel V limit and the Einstein deep survey limit. This 'first' medium sensitivity survey (MSS 1) was primarily aimed at the analysis of the source-count relation for extragalactic X-ray sources. The present investigation is concerned with an extension of the MSS 1 on the basis of an analysis of new fields obtained with the aid of the Imaging Proportional Counter (IPC) on board the Einstein Observatory. A parallel optical program to identify all the new sources was also undertaken. X-ray and optical data are presented for this 'second' complete sample of medium sensitivity survey X-ray sources (MSS 2). The log N-log S relation is derived and discussed.
Document ID
19840065117
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; CNR, Istituto di Radioastronomia Bologna, Italy)
Schild, R. E.
(Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Stocke, J. T.
(Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Liebert, J. W.
(Steward Observatory Tucson, AZ, United States)
Danziger, I. J.
(European Southern Observatory Garching, Germany)
Kunth, D.
(CNRS, Institut d'Astrophysique, Paris, France; European Southern Observatory Garching, Germany)
Lub, J.
(Leiden, Rijksuniversiteit, Sterrewacht, Leiden, Netherlands; European Southern Observatory Garching, Germany)
Date Acquired
August 12, 2013
Publication Date
August 15, 1984
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 283
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
84A47904
Funding Number(s)
CONTRACT_GRANT: NAG8-442
CONTRACT_GRANT: NAS8-30751
Distribution Limits
Public
Copyright
Other

Available Downloads

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