Feb, 2009
Search for Near-Infrared Pulsation of the Anomalous X-Ray Pulsar 4U 0142+61
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
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- Volume
- 61
- Number
- 1
- First page
- 51
- Last page
- 56
- Language
- English
- Publishing type
- Research paper (scientific journal)
- DOI
- 10.1093/pasj/61.1.51
- Publisher
- OXFORD UNIV PRESS
We have searched for pulsation of the anomalous X-ray pulsar (AXP) 4U 0142+61 in the K' band (lambda(eff) = 2.11 mu m) using the fast-readout mode of Infrared Camera and Spectrograph (IRCS) at the Subaru 8.2 m telescope. We found no significant signal at the pulse frequency expected by the precise ephemeris based on an X-ray monitoring observation with RXTE. Nonetheless, we obtained the best upper limit of 17% (90% C.L.) for the root-means-quare pulse fraction in the K' band. Combined with the i' band pulsation (Dhillon et a]. 2005, MNRAS, 363, 609), the slope of the pulsed component (F-nu alpha nu(alpha) in units of Jy) was constrained to alpha > -0.87 (90% C.L.) for an interstellar extinction of A(V) = 3.5.
- Link information
- ID information
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- DOI : 10.1093/pasj/61.1.51
- ISSN : 0004-6264
- eISSN : 2053-051X
- Web of Science ID : WOS:000264417900006