Bibcode
Wijnands, R.; Wolt, M. Klein; Linares, M.; van der Klis, M.; Chakrabarty, D.; Morgan, E. H.; Markwardt, C. B.
Referencia bibliográfica
The Astronomer's Telegram, #507
Fecha de publicación:
6
2005
Número de citas
7
Número de citas referidas
3
Descripción
Follow-up RXTE PCA observations of the transient source consistent with
the position of SAX J1808.4-3658 (ATEL#505) showed clear coherent
pulsations at approximately 401 Hz. This frequency is identical to the
spin frequency of the neutron star in SAX J1808.4-3658 demonstrating
that it is indeed SAX J1808.4-3658 which is in outburst again. During
the three pointed observations the 2-10 keV X-ray fluxes were
approximately 19 mCrab on June 1, 17:35 - 18:42 UTC, 31 mCrab on June 2
00:13 - 00:51 UTC, and 34 mCrab on June 2 10:56 - 11:46 UTC indicating
that the X-ray flux is still rising.