Click here to view fulltext PDF

Permanent link:
https://www.ias.ac.in/article/fulltext/joaa/007/04/0299-0304

accretion—gamma-ray sources—pulsation—X-ray sources

An examination of the existing period searches for 2CG195 + 4 leads to the conclusion that the 59 second periodicity is highly significant only for the 1981 March 17–18 detection of Bignami, Caraveo & Paul (1984). The statistical significance is increased substantially if the pulsation period is half the previously reported value. The period derivative is not well determined. Here we propose that 2CG 195 + 4 is a neutron star powered by accretion from a low (≲ 1M_⊙) mass main-sequence companion. A distance of a few hundred pc would imply that the neutron star is a fast rotator and is spinning down.

D. A. Leahy¹ S. V. Damle² S. Naranan²

1. Department of Physics, The University of Calgary, Calgary, Alberta - T2N 1N4, Canada
2. Tata Institute of Fundamental Research, Bombay - 400005

Published

December 1986

Manuscript received

12 June 1986

Accepted

10 September 1986