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XMM-Newton Spectroscopy of the Accretion-Driven Millisecond X-ray Pulsar XTE J1751-305 in Outburst | | J.M. Miller
; R. Wijnands
; M. Mendez
; E. Kendziorra
; A. Tiengo
; M. van der Klis
; D. Chakrabarty
; B.M. Gaensler
; W.H.G. Lewin
; | | Date: |
7 Aug 2002 | | Journal: | Astrophys.J. 583 (2003) L99 | | Subject: | astro-ph | | Affiliation: | MIT, SRON, Tubingen Univ., IAP, Univ. of Amsterdam, Harvard Univ. | | Abstract: | We present an analysis of the first high-resolution spectra measured from an accretion-driven millisecond X-ray pulsar in outburst. We observed XTE J1751-305 with XMM-Newton on 2002 April 7 for approximately 35 ksec. Using a simple absorbed blackbody plus power-law model, we measure an unabsorbed flux of (6.6 +/- 0.1) * 10^(-10) erg/cm^2/s (0.5--10.0 keV). A hard power-law component (Gamma = 1.44 +/- 0.01) contributes 83% of the unabsorbed flux in the 0.5-10.0 keV band, but a blackbody component (kT = 1.05 +/- 0.01 keV) is required. We find no clear evidence for narrow or broad emission or absorption lines in the time-averaged spectra, and the sensitivity of this observation has allowed us to set constraining upper-limits on the strength of important features. The lack of line features is at odds with spectra measured from some other X-ray binaries which share some similarities with XTE J1751-305. We discuss the implications of these findings on the accretion flow geometry in XTE J1751-305. | | Source: | arXiv, astro-ph/0208166 | | Services: | Forum | Review | PDF | Favorites | |
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