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New hard X-ray sources observed with HEAO A-2A search for new hard X-ray sources using data from the first complete view of the sky with the HEAO A-2 experiment has discovered 47 new sources, detected seven sources recently discovered with other experiments, and significantly reduced the size of the error boxes for six previously known sources. Intensities and error boxes are given for each of these sources; identifications are suggested when an error box contains an object similar to known X-ray sources. The new identifications consist of seven type 1 Seyfert galaxies, including two whose Seyfert characteristics were discovered as a result of their location in an X-ray error box; one intermediate Seyfert galaxy; three Abell clusters; five N galaxies; two bursting radio sources; and an additional three nearby galaxies with bright nuclei and narrow emission lines.
Document ID
19790063647
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Marshall, F. E.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Boldt, E. A.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Holt, S. S.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Mushotzky, R. F.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Rothschild, R. E.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Serlemitsos, P. J.
(NASA Goddard Space Flight Center Laboratory for High Energy Astrophysics, Greenbelt, Md., United States)
Pravdo, S. H.
(NASA Goddard Space Flight Center Laboratory for High Energy Astrophysics, Greenbelt; Maryland, University, College Park, Md., United States)
Date Acquired
August 9, 2013
Publication Date
July 1, 1979
Publication Information
Publication: Astrophysical Journal Supplement Series
Volume: 40
Subject Category
Astrophysics
Accession Number
79A47660
Distribution Limits
Public
Copyright
Other

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