SWIFT J1756.9-2508 is a 182 Hz Millisecond X-ray Pulsar
Abstract
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.
- Publication:
-
The Astronomer's Telegram
- Pub Date:
- June 2007
- Bibcode:
- 2007ATel.1108....1M
- Keywords:
-
- X-ray;
- Gamma Ray;
- Request for Observations;
- Binaries;
- Neutron Stars;
- Pulsars;
- Transients