RXTE detects a coherent signal at ~ 401 Hz from IGR J17498-2921.

Details RXTE detects a coherent signal at ~ 401 Hz from IGR J17498-2921. RXTE detects a coherent signal at ~ 401 Hz from IGR J17498-2921.

Aug 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011atel.3556....1p&link_type=abstract

The Astronomer's Telegram, #3556

Astronomy and Astrophysics

Astronomy

3

X-Ray, Binary, Neutron Star, Transient, Pulsar

Scientific paper

A RXTE Target of Opportunity pointed observation of the newly discovered transient IGR J17498-2921 (ATsLs #3551, #3555) began at roughly 2011-09-13 02:19 UTC, for an exposure of 1.8 ks. The observed flux in the 2-30 keV energy band is 1.1(1)e-9 erg/s/cm2. Such a value is probably an over-estimate of the source flux, because of the contribution by the emission of the Galactic ridge. Power density spectra produced every 256s reveal the presence of a signal at a frequency between 400.95 and 401.0 Hz, making this source a candidate accreting millisecond pulsar.

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