Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985ap%26ss.111..157w&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 111, no. 1, April 1985, p. 157-169.
Astronomy and Astrophysics
Astrophysics
2
Astronomical Spectroscopy, Balloon-Borne Instruments, Crab Nebula, Cygnus Constellation, Gamma Ray Astronomy, Line Spectra, Astrophysics, Data Reduction, Positron Annihilation, Stellar Spectra
Scientific paper
Photon spectra obtained from Cyg X-1 and the Crab Nebula in the energy range 30-270 keV using a balloon-borne germanium detector are reported. The spectrum of Cyg X-1 indicates a line feature at 145 keV superposed on a continuum. The intensity of the feature is (1.34 + or - 0.31) x 10 to the -2nd photons/sq cm/s and the width is 14.3 keV FWHM. This line may be produced by deexcitation of metastable Co-56 resulting from thermonuclear reaction in a hot accretion disk around a black hole. The line emission corresponds to a radiative power of 2.5 x 10 to the 36th erg/s, assuming a distance of 2.5 kpc to Cyg X-1. From the Crab Nebula, a weak line feature with 1.8 sigma excess was found around 78 keV.
No associations
LandOfFree
Line features from Cygnus X-1 and the Crab Nebula in the energy range 30-270 keV 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 Line features from Cygnus X-1 and the Crab Nebula in the energy range 30-270 keV, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Line features from Cygnus X-1 and the Crab Nebula in the energy range 30-270 keV will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1288479