2020RAA....20...98B -
Research in Astron. and astroph., 20, 98-98 (2020/June-0)
Detection of thermonuclear X-ray bursts and dips from the X-ray binary 4U 1323-62 with AstroSat/LAXPC.
BHULLA Y., ROY J. and JAAFFREY S.N.A.
Abstract (from CDS):
Using data from the Large Area X-ray Proportional Counter (LAXPC) on the AstroSat satellite, we observed Type-1 thermonuclear X-ray bursts from the Low Mass X-ray Binary Neutron Star 4U 1323- 62. Observations of 4U 1323-62 that were carried out during the performance verification phase of the AstroSat satellite indicated six thermonuclear X-ray bursts in a total effective exposure of ∼49.5 ks for about two consecutive days. Recurrence time of the detected thermonuclear bursts is in accordance with the orbital period of the source, ∼9400 s. Moreover, the light curve of 4U 1323-62 revealed the presence of two dips. We present the results from time-resolved spectroscopy performed during all of the six X-ray bursts and also report the detection of a known low frequency quasi-periodic oscillation (LFQPO) at ∼1 Hz from the source. However, any evidence of kilohertz QPO was not found. We have shown the burst profile at different energy ranges. Assuming a distance of 10 kpc, we observed a mean flux of ∼1.8x10–9 erg cm2 s –1. The radius of the blackbody is found to be highly consistent with the blackbody temperature and the blackbody flux of the bursts.
Abstract Copyright:
© 2020 National Astronomical Observatories
Journal keyword(s):
accretion - accretion disc - stars: neutron star - X-rays: binaries - X-rays: thermonuclear bursts - individual: 4U 1323-62
Simbad objects:
7
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