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Discovery of 105 Hz coherent pulsations in the ultracompact binary IGR J16597-3704
A. Sanna, A. Bahramian, E. Bozzo +15
We report the discovery of X-ray pulsations at 105.2 Hz (9.5 ms) from the transient X-ray binary IGR J16597-3704 using NuSTAR and Swift. The source was discovered by INTEGRAL in th…
Evidence of a non-conservative mass transfer for XTE J0929-314
A. Marino, T. Di Salvo, A. F. Gambino +5
Context. In 1998 the first accreting millisecond pulsar, SAX J1808.4-3658, was discovered and to date 18 systems showing coherent, high frequency (> 100 Hz) pulsations in low mass…
Updating the orbital ephemeris of the dipping source XB 1254-690 and the distance to the source
A. F. Gambino, R. Iaria, T. Di Salvo +5
XB 1254-690 is a dipping low mass X-ray binary system hosting a neutron star and showing type I X-ray bursts. We aim at obtaining more accurate orbital ephemeris and at constrainin…
On the timing properties of SAX J1808.4-3658 during its 2015 outburst
A. Sanna, T. Di Salvo, L. Burderi +7
We present a timing analysis of the 2015 outburst of the accreting millisecond X-ray pulsar SAX J1808.4-3658, using non-simultaneous XMM-Newton and NuStar observations. We estimate…
Study of the accretion torque during the 2014 outburst of the X-ray pulsar GRO J1744-28
A. Sanna, A. Riggio, L. Burderi +9
We present the spectral and timing analysis of the X-ray pulsar GRO J1744-28 during its 2014 outburst using data collected with the X-ray satellites Swift, INTEGRAL, Chandra, and X…
A possible solution of the puzzling variation of the orbital period of MXB 1659-298
R. Iaria, A. F. Gambino, T. Di Salvo +6
MXB 1659-298 is a transient neutron star Low-Mass X-ray binary system that shows eclipses with a periodicity of 7.1 hr. The source went to outburst in August 2015 after 14 years of…