NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
OSSE observations of NGC 1275 in the 0.05-10.0 MeV rangeWe made observations of NGC 1275 with the Compton Gamma-Ray Observatory's Oriented Scintillation Spectrometer Experiment (OSSE) between 1991 November 28 and December 12. We did not detect the source during this viewing period. Our 3 sigma upper limit to a detection in the approximately 50-90 keV range is 6 x 10(exp -6) photons/sq cm/s/keV. This flux is more than 10 times lower than the 3 sigma detection in the same energy range reported by Rothschild et al. for their OSO 7 observations. Our results are discussed in comparison with radio observations and models for the X-ray emission, and we show that it is likely that most of the approx. greater than 10 keV photons come from the nuclear region of NGC 1275. We find no significant correlation between the variable radio intensity and the hard X-ray flux of the entire NGC 1275 source. Simultaneous Very Large Baseline Array and gamma-ray observations are needed to test the self-Compton synchrotron models for gamma-ray emission from the core of NGC 1275. Our results also provide a lower limit to the magnetic field of approximately 2 x 10(exp -7) gauss for the approximately 5 min radio source centered on NGC 1275.
Document ID
19950036451
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Osako, C. Y.
(Northwestern Univ. Evanston, IL, United States)
Ulmer, M. P.
(Northwestern Univ. Evanston, IL, United States)
Grabelsky, D. A.
(Northwestern Univ. Evanston, IL, United States)
Purcell, W. R.
(Northwestern Univ. Evanston, IL, United States)
Strickman, M. S.
(Naval Research Lab. Washington, DC, United States)
Johnson, W. N.
(Naval Research Lab. Washington, DC, United States)
Kinzer, R. L.
(Naval Research Lab. Washington, DC, United States)
Kurfess, J. D.
(Naval Research Lab. Washington, DC, United States)
Jung, G. V.
(Univ. Space Research Association, Washington, DC United States)
Date Acquired
August 16, 2013
Publication Date
November 1, 1994
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 435
Issue: 1
ISSN: 0004-637X
Subject Category
Astronomy
Accession Number
95A68050
Distribution Limits
Public
Copyright
Other

Available Downloads

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