SWIFT J1756.9-2508 is a 182 Hz Millisecond X-ray Pulsar

Details SWIFT J1756.9-2508 is a 182 Hz Millisecond X-ray Pulsar SWIFT J1756.9-2508 is a 182 Hz Millisecond X-ray Pulsar

Jun 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007atel.1108....1m&link_type=abstract

The Astronomer's Telegram, #1108

Astronomy and Astrophysics

Astronomy

13

X-Ray, Gamma Ray, Request For Observations, Binaries, Neutron Stars, Pulsars, Transients

Scientific paper

We report that the new transient SWIFT J1756.9-2508 (ATEL #1105) is the eighth known millisecond X-ray pulsar. RXTE PCA observed the sources starting on 13 June 2007 (19:00 UTC) for about 1700 seconds. X-ray pulsations were detected at a (barycentered) frequency of 182.06 Hz, with an r.m.s. pulsed amplitude of a few percent. In a crude analysis, small changes in the pulse frequency are seen (of order mHz), which might be suggestive of orbital period modulation.

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