| Autor: |
Navale, Nilam R, Pawar, Devraj, Rao, A R, Misra, Ranjeev, Chakraborty, Sudip, Bhattacharyya, Sudip, Bambole, Vaishali A |
| Předmět: |
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| Zdroj: |
Monthly Notices of the Royal Astronomical Society; Aug2024, Vol. 532 Issue 3, p2955-2964, 10p |
| Abstrakt: |
XB 1254−690 is a neutron star low-mass X-ray binary with an orbital period of 3.88 h, and it exhibits energy-dependent intensity dips, thermonuclear bursts, and flares. We present the results of an analysis of a long observation of this source using the AstroSat satellite. The X-ray light curve gradually changed from a high-intensity flaring state to a low-intensity one with a few dips. The hardness–intensity diagram showed that the source is in a high-intensity banana state with a gradually changing flux. Based on this, we divide the observation into four flux levels for a flux-resolved spectral study. The X-ray spectra can be explained by a model consisting of absorption, thermal emission from the disc, and non-thermal emission from the corona. From our studies, we detect a correlation between the temperature of the thermal component and the flux and we examine the implications of our results for the accretion disc geometry of this source. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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