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/2289/4902
Full metadata record
DC FieldValueLanguage
dc.contributor.authorRao, A.R.-
dc.contributor.authorPaul, Biswajit-
dc.contributor.authorChitnis, V.R.-
dc.contributor.authorAgrawal, P.C.-
dc.contributor.authorManchanda, R.K.-
dc.date.accessioned2012-07-14T09:46:18Z-
dc.date.available2012-07-14T09:46:18Z-
dc.date.issued1994-09-
dc.identifier.citationAstronomy and Astrophysics, 1994, Vol.289, pL43-L46en
dc.identifier.issn0004-6361-
dc.identifier.urihttp://hdl.handle.net/2289/4902-
dc.descriptionOpen Accessen
dc.description.abstractWe have observed the Galactic center hard X-ray pulsar GX 1+4 on 1993 December 11, in the energy range of 20 - 100 keV with a balloon-borne Xenon filled Multi-cell Proportional Counter (XMPC) telescope. The source was detected in a bright state, the average observed source count rate being 10.1 +/- 0.2/s per detector. X-ray pulsations with a period of 121.0 +/- 0.4 s were detected in the source at a very high significance level. This, compared with the Burst and Transient Source Experiment (BATSE) observations, gives a spin down rate of dot-P = 1.6 +/- 1.4 s/yr. The pulse fraction in the hard X-ray range is low (35%), and the observed spectrum is very hard (power law energy index 0.54 +/- 0.18). The observed source luminosity in the 20 - 100 keV range is 7.9 +/- 0.3 x 1037 erg/s. These properties are similar to those seen during high luminosity spin up state of early 1970s and suggest that the source should revert back to a a spin-up episode.en
dc.language.isoenen
dc.publisherEDP Sciencesen
dc.relation.urihttp://adsabs.harvard.edu/abs/1994A%26A...289L..43Ren
dc.rights1994 EDP Sciencesen
dc.titleDetection of a very low hard X-ray pulse fraction in the bright state of GX 1+4en
dc.typeArticleen
Appears in Collections:Research Papers (A&A)

Files in This Item:
File Description SizeFormat 
1994_A&A_V289_p43.pdf
  Restricted Access		Open Access171.71 kBAdobe 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.