ROSAT and Optical Observations of Two X-Ray Transients - MX:0836-42 and GS:0834-430

Details ROSAT and Optical Observations of Two X-Ray Transients - MX:0836-42 and GS:0834-430 ROSAT and Optical Observations of Two X-Ray Transients - MX:0836-42 and GS:0834-430

Apr 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...271..487b&link_type=abstract

Astronomy and Astrophysics, Vol.271, NO. 2/APR, P. 487, 1993

Astronomy and Astrophysics

Astrophysics

11

Stars: Individual: Gs 0834-430, Stars: Individual: Mx 0836-42, X-Rays

Scientific paper

Two transient sources have been detected in hard X-rays by several instruments at the end of 1990. We observed both sources with ROSAT in the all sky survey and during the pointing phase. The positive detection of the sources in the ROSAT pointing observations made possible to derive accurate positions for both sources. We also present optical images of the ROSAT error boxes obtained with the ESO NTT. Pulsations are clearly detected from GS 0834-430 with a period of 12.3203±0.0015 s. The pulse profile is roughly sinusoidal with a 13% rms variation. The comparison with hard X-ray data and the possible nature of the sources are discussed.

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