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arXiv:astro-ph/0402076 (astro-ph)
[Submitted on 3 Feb 2004]

Title:X-ray spectral and timing properties of the 2001 superburst of 4U 1636-536

Authors:Erik Kuulkers (1), Jean in 't Zand (2,3), Jeroen Homan (4), Steve van Straaten (5), Diego Altamirano (5), Michiel van der Klis (5) ((1) ESA/ESTEC; (2) SRON; (3) Utrecht University; (4) MIT; (5) University of Amsterdam)
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Abstract: Preliminary results are reported on the spectral and timing properties of the spectacular 2001 superburst of 4U 1636-536 as seen by the RXTE/PCA. The (broad-band) power-spectral and hardness properties during the superburst are compared to those just before and after the superburst. Not all of the superburst emission can be fitted by pure black-body radiation. We also gathered BeppoSAX/WFC and RXTE/ASM data, as well as other RXTE/PCA data, obtained days to months before and after the superburst to investigate the normal X-ray burst behavior around the time of the superburst. The first normal X-ray burst after the 2001 superburst was detected 23 days later. During inspection of all the RXTE/ASM data we found a third superburst. This superburst took place on June 26, 1999, which is ~2.9 yrs after the 1996 superburst and ~1.75 yrs before the 2001 superburst. The above findings are the strongest constraints observed so far on the duration of the cessation of normal X-ray bursts after a superburst and the superburst recurrence times.
Comments: 4 pages, 4 figures,to appear in the proceedings of "X-Ray Timing 2003: Rossi and Beyond", eds. P. Kaaret, F.K. Lamb, & J.H. Swank (Melville, NY: AIP)
Subjects: Astrophysics (astro-ph)
Cite as: arXiv:astro-ph/0402076
  (or arXiv:astro-ph/0402076v1 for this version)
  https://doi.org/10.48550/arXiv.astro-ph/0402076
Related DOI: https://doi.org/10.1063/1.1781037

Submission history

From: Erik Kuulkers [view email]
[v1] Tue, 3 Feb 2004 15:44:22 UTC (102 KB)
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