AstroSat Observations of the Dipping Low Mass X-ray Binary XB 1254-690
| Title: | AstroSat Observations of the Dipping Low Mass X-ray Binary XB 1254-690 |
|---|---|
| Authors: | Navale, Nilam R., Pawar, Devraj, Rao, A. R., Misra, Ranjeev, Chakraborty, Sudip, Bhattacharyya, Sudip, Bambole, Vaishali A. |
| Publication Year: | 2024 |
| Collection: | Astrophysics |
| Subject Terms: | Astrophysics - High Energy Astrophysical Phenomena |
| More Details: | XB 1254-690 is a neutron star low-mass X-ray binary with an orbital period of 3.88 hrs, 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. Comment: Accepted for publication in MNRAS; 11 pages, 12 figures |
| Document Type: | Working Paper |
| Access URL: | http://arxiv.org/abs/2407.05371 |
| Accession Number: | edsarx.2407.05371 |
| Database: | arXiv |
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