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Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/4078
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dc.contributor.authorDevasia, Jincy-
dc.contributor.authorJames, Marykutty-
dc.contributor.authorPaul, Biswajit-
dc.contributor.authorIndulekha, Kavila-
dc.date.accessioned2011-08-11T05:50:23Z-
dc.date.available2011-08-11T05:50:23Z-
dc.date.issued2011-06-
dc.identifier.citationMonthly Notices of the Royal Astronomical Society, 2011, Vol.414, p1023en
dc.identifier.issn0035-8711-
dc.identifier.issn1365-2966 (online)-
dc.identifier.urihttp://hdl.handle.net/2289/4078-
dc.descriptionRestricted Access. An open-access version is available at arXiv.org (one of the alternative locations)en
dc.description.abstractWe report detailed timing and spectral analysis of RXTE-PCA data obtained from observations during the outburst of a transient X-ray pulsar 1A 1118–61 in January 2009. The pulse profile showed significant evolution during the outburst and also significant energy dependence − a double peaked profile upto 10 keV and a single peak at higher energy. We have also detected quasi-periodic oscillations (QPO) at 0.07–0.09 Hz. The rms value of the QPO is 5.2 % and it shows a significant energy dependence with highest rms of 7% at 9 keV. The QPO frequency changed from 0.09 Hz to 0.07 Hz within 10 days. The magnetic field strength calculated using the QPO frequency and the X-ray luminosity is in agreement with the magnetic field strength measured from the energy of the cyclotron absorption feature detected in this source. The 3-30 keV energy spectrum over the 2009 outburst of 1A 1118–61 can be well fitted with a partial covering power-law model with a high energy cutoff and an iron fluorescence line emission. The pulse phase resolved spectral analysis shows that the partial covering and high energy cutoff model parameters have significant changes with the pulse phase.en
dc.language.isoenen
dc.publisherWiley Interscience for the Royal Astronomical Societyen
dc.relation.urihttp://adsabs.harvard.edu/abs/2011MNRAS.414.1023Den
dc.relation.urihttp://arxiv.org/abs/1101.5020en
dc.relation.urihttp://dx.doi.org/10.1111/j.1365-2966.2011.18407.xen
dc.rights2011 The authors & the Royal Astronomical Societyen
dc.subjectBinariesen
dc.subjectPulsarsen
dc.subjectX-ray binariesen
dc.subjectX-rayen
dc.subjectX-ray:starsen
dc.titleRXTE-PCA observations of 1A 1118--61: timing and spectral studies during an outbursten
dc.typeArticleen
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