A weak outburst of the millisecond X-ray pulsar SAX J1808.4-3658 in October 1996 as detected from RXTE slew data |
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| Authors: | M G Revnivtsev |
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| Institution: | (1) Max Planck Institut für Astrophysik, Karl Schwarzschild Str. 1, 85740 Garching bei München, Germany;(2) Space Research Institute, Russian Academy of Sciences, Profsoyuznaya ul. 84/32, Moscow, 117810, Russia |
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| Abstract: | Analysis of the RXTE slew data in October 1996 revealed a weak X-ray burst from the millisecond pulsar SAX J 1808.4-3658. The 3–20-keV energy spectrum of the source can be described by a power law with an index of 2.0 and a(3-to 20 keV) luminosity of ～1.4×1035 erg s?1 (the distance to the source was taken to be 2.5 kpc). Because of the short exposure time, we failed to detect weak pulsations at a frequency of 401 Hz in the source. The (2σ) upper limit of the pulse fraction is ～13%. |
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| Keywords: | RXTE pulsars neutron stars and black holes X-ray binaries SAX J1808 4-3658 |
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