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Title: X-ray properties of the transient pulsar 3A 0535+262 in quiescence
Authors: Mukherjee, U.
Paul, Biswajit
Issue Date: Feb-2005
Publisher: EDP Sciences
Citation: Astronomy and Astrophysics, 2005, Vol. 431, p667-672
Abstract: We present the timing and spectral properties of the transient Be/X-ray binary pulsar 3A 0535+262 during quiescence using three observations with the narrow field imaging instruments (NFI) of BeppoSAX. Assuming a distance of 2 kpc for this system, the 2-10 keV X-ray luminosities measured from the three observations are in the range of 1.5-4.0 × 1033 erg s-1, indicating a very low rate of accretion. We report the detection of pulsations at a very low luminosity of 2 × 1033 erg s-1 during one of the three observations, though at this accretion rate the system is expected to be in the centrifugally inhibited regime. The X-ray spectra for the unpulsed observations are best modeled as power law type while a combined model of power law and black-body is required to fit the pulsed spectrum.
Description: Open Access
ISSN: 0004-6361
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Copyright: 2005 EDP Sciences
Appears in Collections:Research Papers (A&A)

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