1. RRI Digital Repository
  2. 04. Astronomy and Astrophysics
  3. Research Papers (A&A)
Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/5929
Full metadata record
DC FieldValueLanguage
dc.contributor.authorJaisawal, Gaurava K.-
dc.contributor.authorNair, Sachindra-
dc.contributor.authorPaul, Biswajit-
dc.date.accessioned2014-07-22T11:33:00Z-
dc.date.available2014-07-22T11:33:00Z-
dc.date.issued2013-12-10-
dc.identifier.citationAstrophysical Journal, 2013, Vol.779, p54en
dc.identifier.issn0004-637X-
dc.identifier.issn1538-4357-(Online)-
dc.identifier.urihttp://hdl.handle.net/2289/5929-
dc.descriptionRestricted Accessen
dc.description.abstractWe present timing and broad band spectral studies of the high-mass X-ray binary pulsar 4U 1909+07 using data from Suzaku observations during 2010 November 2–3. The pulse period of the pulsar is estimated to be 604.11 ± 0.14 s. Pulsations are seen in the X-ray light curve up to ~70 keV. The pulse profile is found to be strongly energy-dependent: a complex, multi-peaked structure at low energy becomes a simple single peak at higher energy. We found that the 1–70 keV pulse-averaged continuum can be fit by the sum of a blackbody and a partial covering Negative and Positive power law with Exponential cutoff model. A weak iron fluorescence emission line at 6.4 keV was detected in the spectrum. An absorption-like feature at ~44 keV was clearly seen in the residuals of the spectral fitting, independent of the continuum model adopted. To check the possible presence of a cyclotron resonance scattering feature (CRSF) in the spectrum, we normalized the pulsar spectrum with the spectrum of the Crab Nebula. The resulting Crab ratio also showed a clear dip centered at ~44 keV. We performed statistical tests on the residuals of the spectral fitting and also on the Crab spectral ratio to determine the significance of the absorption-like feature and identified it as a CRSF of the pulsar. We estimated the corresponding surface magnetic field of the pulsar to be 3.8 × 1012 G.en
dc.language.isoenen
dc.publisherIOP Sciences for The American Astronomical Societyen
dc.relation.urihttp://ads.nao.ac.jp//abs/2013ApJ...779...54Jen
dc.relation.urihttp://arxiv.org/abs/1310.0948en
dc.relation.urihttp://dx.doi.org/10.1088/0004-637X/779/1/54en
dc.rights2013 American Astronomical Society, This article may be downloaded for personal use only. Any other use requires prior permission of the author and The American Astronomical Societyen
dc.subjectIndividual (4U 1909+07)en
dc.titlePossible detection of a cyclotron resonance scattering feature in the X-ray pulsar 4U 1909+07.en
dc.typeArticleen
Appears in Collections:Research Papers (A&A)

Files in This Item:
File Description SizeFormat 
2013_APJ_779_54.pdf
  Restricted Access		Restricted Access1.02 MBAdobe PDFView/Open Request a copy
Show simple item record


Items in RRI Digital Repository are protected by copyright, with all rights reserved, unless otherwise indicated.