Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995a%26a...295l..23j&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 295, no. 2, p. L23-L26
Astronomy and Astrophysics
Astronomy
30
Continuous Spectra, Emission Spectra, Galactic Bulge, Gamma Ray Astronomy, Gamma Ray Spectra, Line Spectra, Positron Annihilation, X Ray Astronomy, X Ray Sources, Astronomical Spectroscopy, Black Holes (Astronomy), Gamma Ray Observatory, Novae
Scientific paper
We present data on the galactic X-ray source 1E 1740.7-2942 from the Oriented Scintillation Spectrometer Experiment (OSSE) on board NASA's Compton Gamma Ray Observatory (CGRO). Episodes of increased low-energy gamma radiation have been reported from this source, including 1-day events in 1990 October and 1992 September. These events, of intensity 7 x 10-3 and 4 x 10-3 photons/sq cm/s, respectively, have been interpreted as broadened and redshifted positron annihilation radiation. OSSE conducted observations of the Galactic Center region during a 21-day interval from 1992 September 17 thru 1992 October 8. This includes the time of increased 200-450 keV emission from 1E 1740.7-2942 reported by SIGMA. The OSSE observations do not confirm this event. For the specific outburst recorded by SIGMA, 1992 Sep. 19.42-20.58 (UT), OSSE data provide an upper limit (3 sigma) of 2.4 x 10-3 photons/sq cm/s.
Grabelsky David Andrew
Grove Eric J.
Johnson Neil W.
Jung Gregory V.
Kinzer Robert L.
No associations
LandOfFree
OSSE observations of 1E 1740.7-2942 in 1992 September does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with OSSE observations of 1E 1740.7-2942 in 1992 September, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and OSSE observations of 1E 1740.7-2942 in 1992 September will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-881415