A superburst from GX 3+1

Details A superburst from GX 3+1 A superburst from GX 3+1

2001-12-20

arxiv.org/abs/astro-ph/0112481v1

Astronomy and Astrophysics

Astrophysics

4 pages, 1 figure, accepted for A&A Letters

Scientific paper

10.1051/0004-6361:20011811

I found one long X-ray flare from the X-ray burster GX 3+1 in almost 6 years of observations with the RXTE All Sky Monitor (ASM). The event had a peak flux of about 1.1 Crab (1.5-12 keV), lasted between 4.4 and 16.2 hours and exhibited a fluence of more than about 5x10^{41} erg for a source distance of 5 kpc. During the exponential-like decay, with an exponential decay time of 1.6 hours, spectral softening is seen. The total ASM effective exposure time on GX 3+1 is estimated to be around a year. The flare bears all the characteristics of the recently discovered so-called superbursts in other X-ray burst sources.

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