New millisecond X-ray pulsar IGR J17498-2921
The third accreting millisecond pulsar discovered in 2011 August by
ESA's INTEGRAL satellite,
IGR J17498-2921 was found by RXTE to pulse at 401 Hz.
Although this might seem fast (401 times every second!), it is nowhere near
the record for a millsecond X-ray pulsar (599 Hz, for IGR J00291+5934)
or even for a radio pulsar (716 Hz, for
Subsequent observations revealed Doppler modulations of the pulse indicating
a 3.8 hr orbit, as well as thermonuclear burst activity.
Falanga led a paper on the properties of the source and its behaviour
throughout the outburst. The paper has just been accepted by A&A.
Read the paper (arXiv:1208.1384)