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Variability and Spectra of Two Neutron Stars in 47 Tucanae | C. O. Heinke
; J. E. Grindlay
; D. A. Lloyd
; P. D. Edmonds
; | Date: |
6 Dec 2001 | Subject: | astro-ph | Abstract: | We report spectral and variability analysis of two quiescent low mass x-ray binaries (previously identified with ROSAT HRI as X5 and X7) in the globular cluster 47 Tuc, from a Chandra ACIS-I observation. X5 demonstrates sharp eclipses with an 8.666+-0.008 hr period, as well as dips showing an increased N_H column. Their thermal spectra are well-modelled by unmagnetized hydrogen atmospheres of hot neutron stars, most likely heated by transient accretion, with little to no hard power law component. | Source: | arXiv, astro-ph/0112127 | Services: | Forum | Review | PDF | Favorites |
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