A four-hours long burst from Serpens X-1

Abstract

During a serendipitous observation of the BeppoSAX Wide Field Cameras, a very long Type I X-ray burst was observed from the low mass X-ray binary Serpens X-1. The burst lasted for approximately 4 hours and had an exponential decay time of 69+/-2 min (2-28 keV). The bolometric peak-luminosity is (1.6+/-0.2)x10^38 erg/s and the fluence (7.3+/-1.4)x10^41 erg. The first 'normal' Type I burst was observed 34 days after the superburst. This is in rough agreement with recent predictions for unstable carbon burning in a heavy element ocean.

4 pages, 2 figures, accepted for publication by A&A

References in corpus (2)

• Carbon Flashes in the Heavy Element Ocean on Accreting Neutron Stars
• Recurrent very-long type-I X-ray bursts in the low-mass X-ray binary 4U 1636-53

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• On the disc reflection spectroscopy of NS LMXB Serpens~X-1: analysis of a recent NuSTAR observation
• Carbon Synthesis in Steady-State Hydrogen and Helium Burning On Accreting Neutron Stars
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• Model of heat diffusion in the outer crust of bursting neutron stars
• Serpens X-1 observed by INTEGRAL
• Tracing the outburst decay of soft X-ray transients Aql X-1 and 4U 1608-52 with XSPECT