The X-ray Nova GRS 1739-278 near the Galactic Center
Borozdin, K. N. · Revnivtsev, M. G. · Trudolyubov, S. P. · Aleksandrovich, N. L. · Sunyaev, R. A. · Skinner, G. K.
Original · EN
The soft X-ray nova GRS 1739-278 flared up in 1996 near the Galactic center. We present the observations of this interesting source, a black-hole candidate, with the instruments on board the Mir-Kvant module and the RXTE satellite. The TTM data allow the spectrum of the X-ray nova to be studied during the rise in its brightness. The source's spectrum in this period is satisfactorily described by a power law with a gradually increasing index. The RXTE spectra after the source passed its maximum brightness have the appearance that is typical of the high and ultrahigh states of black-hole candidates; they are described by a two-component model. The broad-band spectra of the source are discussed in terms of the processes that proceed near an accreting black hole in a binary system.
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