It BeppoSAX monitoring of the ``anomalous'' X-ray pulsar 4U 0142+61} SAX monitoring of the ``anomalous'' X-ray pulsar 4U 0142+61

Details It BeppoSAX monitoring of the ``anomalous'' X-ray pulsar 4U 0142+61} SAX monitoring of the ``anomalous'' X-ray pulsar 4U 0142+61 It BeppoSAX monitoring of the ``anomalous'' X-ray pulsar 4U 0142+61} SAX monitoring of the ``anomalous'' X-ray pulsar 4U 0142+61

Jun 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999a%26a...346..929i&link_type=abstract

Astronomy and Astrophysics, v.346, p.929-935 (1999)

Astronomy and Astrophysics

Astrophysics

29

Stars: Evolution, Stars: Neutron, Stars: Pulsars: Individual: 4U 0142+61, X-Rays: Stars

Scientific paper

The 8.7 s X-ray pulsar 4U 0142+61 was monitored by BeppoSAX between January 1997 and February 1998. This source belongs to the rapidly growing class of ``anomalous" X-ray pulsars (AXPs) which have pulse periods in the 6-12 s range and no plausible optical, infrared or radio counterparts. The BeppoSAX periods measurements show that 4U 0142+61 continues its spin-down at a nearly constant rate of Pdot ~ 2x10(-12) s s(-1) . The 0.5-10 keV pulse shape is double peaked. The phase-averaged spectrum can be described by a steep absorbed power-law (Gamma ~ 4) plus a blackbody with kT ~ 0.4 keV. 4U 0142+61 was also detected serendipitously in a March 1996 ROSATXTE observation pointed towards the nearby 1455 s X-ray pulsar RX J0146.9+6121. The timing analysis results are reported for this observation and the spin history of 4U 0142+61 since 1979 is discussed.

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