A possible 38 day X-ray period of KS 1731-260
نویسندگان
چکیده
منابع مشابه
Possible 38 day X - ray period of KS 1731 - 260
We report the detection of a 38 day period in the X-ray flux of the transient burster KS 1731-260 . The narrow peak of periodicity was detected during ∼TJD 10150–11050 when the source had a high and relatively stable X-ray flux. After ∼TJD 11100 the source became strongly variable on a time scale of months that contaminates the search for the 38 day periodicity. The detected period can not be a...
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We report on an approximately twelve hour long X-ray flare from the low-mass X-ray binary KS 1731−260. The flare has a rise time of less than 13min and declines exponentially with a decay time of 2.7 hours. The flare emission is well described by black-body radiation with peak temperature of 2.4 keV. The total energy release from the event is 10 erg (for an assumed distance of 7 kpc). The flare...
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A highly coherent 523.92± 0.05 Hz periodic X-ray signal has been observed during a type I X-ray burst from the low-mass X-ray binary system KS 1731-260 with the PCA on RXTE. The spectral evolution of the burst indicates photospheric-radius expansion and contraction. The 524 Hz signal occurred at the end of the contraction phase, lasted for ∼2 s, was highly coherent (Q ∼> 900), and had a pulse f...
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We present an analysis of the full set of Rossi X-Ray Timing Explorer (RXTE) observations of KS 1731−260 made between 1996 August and 1999 February, concentrating on the nine type I X-ray bursts that were observed. We find that the bursts divide naturally into two populations: " fast bursts " occur on the Banana Branch when the accretion rate is high and exhibit short decay times, high peak flu...
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We present an analysis of the full set of Rossi X-Ray Timing Explorer (RXTE) observations of KS 1731−260 made between 1996 August and 1999 February, concentrating on the nine type I X-ray bursts that were observed. We find that the bursts divide naturally into two populations: “fast bursts” occur on the Banana Branch when the accretion rate is high and exhibit short decay times, high peak fluxe...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2003
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361:20021873