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Pulsed Gamma Rays from Geminga
Cheng, K. S.; Ma, Y. Q.
The pulsed gamma ray spectrum is obtained by analyzing COS-B data of observation no. 14, 39, 54 and 64. We find that the pulsed spectrum differs significantly from that of previous reports in which the pulsed component and steady component are not separated. A clear spectral break of the pulsed spectrum occurs at ~ 100 MeV and the majority of the …
Possible discovery of threeγ-ray pulsars
Yu, K. N.; Young, E. C. M.; Lu, Tan +1 more
The possible discovery of threeγ-ray pulsars 0656 + 14, 0950 + 08, and 1822 - 09 based on COS-B data analysis is reported. Their light curves, the other related features, and the methods leading to these results are also given. Among these three pulsars, PSR 0656 + 14 is the most significant one for being aγ-ray pulsar.
Are PSR 0656+14, PSR 0950+08, and PSR 1822-09 gamma-ray pulsars?
Brown, Lawrence E.; Hartmann, Dieter H.
The possible discovery of three new γ-ray pulsars PSR 0656+14, PSR 0950+08, and PSR 1822-09 (Ma, Lu, Yu, and Young, 1993) in data obtained with the COS-B experiment is reinvestigated using a refined technique for pulsar light curve analysis. The results of this study do not confirm the previously claimed γ-ray pulsar nature of any of these pulsars…
Periodicity Search in Sources with Low Count Rate
Bisnovatyi-Kogan, G. S.; Gurin, L. S.; Beliaeva, N. P. +2 more
The problem of discovery and estimation of the period, slowly changing in time is considered, when the pulses are rare. Several criteria are proposed on the base of which a multilevel algorithm of the period detection is constructed. The reliability and precision of the period determination are investigated with taking into account of the correlat…
The Ability of Cos-B to Measure Gamma-Ray Bursts
Boella, G.; Gorisse, M.; Taylor, B. G. +2 more
The COS-B satellite for gamma-ray astronomy, launched on 7 August, 1975, features as part of the main instrument a 1.1 m2, 10 mm thick, plastic scintillator for the vetoing of charged particle events. This detector which has an average effective area of 360 cm2 for gamma rays in the interval 0.1 to 1 MeV has been instrumented…