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The diffuse soft X-ray background as seen with the Einstein ObservatoryA systematic survey of the diffuse soft X-ray background as seen directly with the Einstein Observatory is presented. With the aid of 1633 selected 1 x 1 deg fields of view obtained by the IPC to provide about 5-percent sky coverage, with some bias toward the Galactic plane, the background in the 0.16-3.5 keV spectral region was spatially resolved on this angular scale. Maps of the background are characterized and produced at different energies within the Einstein passband. It is confirmed that the Galactic ridge is not present at energies below 0.33 keV and it is demonstrated that the appearance of the ridge above this energy is not due to hard Galactic sources with a flux above 10 exp -13 ergs/sq cm/s. A southern Galactic region is identified, with l between 80 and 180 deg and b less than -5 deg, where the mean background intensity has the lowest value and is homogeneous within better than 9 percent. The implications of these results for the Galactic structure and for the nature of the extragalactic X-ray background are discussed.
Document ID
19910072247
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Micela, G.
(Osservatorio Astronomico Palermo, Italy)
Sciortino, S.
(Osservatorio Astronomico Palermo, Italy)
Vaiana, G. S.
(Palermo Osservatorio Astronomico, Italy)
Harnden, F. R., Jr.
(Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Rosner, R.
(Chicago, University IL, United States)
Date Acquired
August 14, 2013
Publication Date
October 20, 1991
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 380
ISSN: 0004-637X
Subject Category
Space Radiation
Accession Number
91A56870
Distribution Limits
Public
Copyright
Other

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