X-ray observation of XTE J2012+381 during the 1998 outburst |
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| Authors: | S Naik P C Agrawal B Paul A R Rao S Seetha K Kasturirangan |
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| Institution: | (1) Tata Institute of Fundamental Research, Homi Bhabha Road, 400005 Mumbai, India;(2) Present address: Institute of Space and Astronautical Science, 3-1-1 Yoshinodai Sagamihara, 229-8510 Kanagawa, Japan;(3) ISRO Satellite Center, Airport Road, Vimanapura P.O., 560017 Bangalore, India |
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| Abstract: | The outburst of X-ray transient source XTE J2012+381 was detected by the RXTE All-Sky Monitor on 1998 May 24th. Following
the outburst, X-ray observations of the source were made in the 2–18 keV energy band with the Pointed Proportional Counters
of the Indian X-ray Astronomy Experiment (IXAE) on-board the Indian satellite IRS-P3 during 1998 June 2nd–10th. The X-ray
flux of the source in the main outburst decreased exponentially during the period of observation. No large amplitude short-term
variability in the intensity is detected from the source. The power density spectrum obtained from the timing analysis of
the data shows no indication of any quasi-periodic oscillations in 0.002–0.5 Hz band. The hardness ratio i.e. the ratio of
counts in 6–18 keV to 2–6 keV band, indicates that the X-ray spectrum is soft with spectral index >2. From the similarities
of the X-ray properties with those of other black hole transients, we conclude that the X-ray transient XTE J2012+381 is likely
to be a black hole. |
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| Keywords: | Accretion accretion disks black hole physics Xrays: stars stars: individual XTE J2012+381 |
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