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The X-ray shadow of the high-latitude molecular cloud MBM 12ROSAT XRT/PSPC observations show a deep shadow cast by the high-latitude molecular cloud MBM 12 in the 3/4 keV diffuse background. Modeling of the shadow implies that less than 20 percent of the typical high-latitude 3/4 keV diffuse background intensity is emitted in front of the cloud (D = 60-70 pc). A weaker shadow consistent with the lower optical depth at higher energies was observed in the 1.5 keV band. Since little shadowing was seen in the 1/4 keV band, this observation places strong constraints on the amount of 0.5-2 keV emission that is intermixed with the source of the observed 1/4 keV flux.
Document ID
19930053820
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Snowden, S. L.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Mccammon, D.
(Wisconsin Univ. Madison, United States)
Verter, F.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 16, 2013
Publication Date
May 20, 1993
Publication Information
Publication: Astrophysical Journal, Part 2 - Letters
Volume: 409
Issue: 1
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
93A37817
Funding Number(s)
CONTRACT_GRANT: NAG5-679
CONTRACT_GRANT: NAG5-1786
Distribution Limits
Public
Copyright
Other

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