Pointed RXTE observations of SAX J1808.4-3658

Details Pointed RXTE observations of SAX J1808.4-3658 Pointed RXTE observations of SAX J1808.4-3658

Jun 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005atel..507....1w&link_type=abstract

The Astronomer's Telegram, #507

Astronomy and Astrophysics

Astronomy

6

X-Ray, Binaries, Neutron Stars, Pulsars, Transients

Scientific paper

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.

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