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DC Field | Value | Language |
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dc.contributor.author | Agrawal, P.C. | - |
dc.contributor.author | Naik, S. | - |
dc.contributor.author | Rao, A.R. | - |
dc.contributor.author | Paul, Biswajit | - |
dc.contributor.author | Seetha, S. | - |
dc.contributor.author | Kasturirangan, K. | - |
dc.date.accessioned | 2012-07-17T04:05:44Z | - |
dc.date.available | 2012-07-17T04:05:44Z | - |
dc.date.issued | 2001-01 | - |
dc.identifier.citation | Advances in Space Research, 2001, Vol. 28, p355-361 | en |
dc.identifier.issn | 0273-1177 | - |
dc.identifier.uri | http://hdl.handle.net/2289/4945 | - |
dc.description | Restricted Access | en |
dc.description.abstract | This paper reports the detection of a series of X-ray dips in the superluminal black hole source GRS 1915+105 during 1999 June 6-17 from observations carried out with the Pointed Proportional Counters of the Indian X-ray Astronomy Experiment on board the Indian satellite IRS-P3. The observations made in the soft state after the source had made a transition from a low-hard state to a high-soft state, reveal large number of x-ray dips each lasting for about 100- 150 seconds on most of the days. Quasi periodic oscillation (QPOs) with characteristics similar to those of the 0.5-10 Hz QPOs, seen during the low-hard state of the source, were detected in the non-dip portions of the data. The QPOs are, however, not present during the onset or in the dip-period data. During the dips the energy spectrum is soft and the variability is low compared to the non-dip periods. These features re-appear as the dip gradually recovers. Coincident with the occurrence of a large number of X-ray dips, a huge radio flare of strength 0.48 Jy (at 2.25 GHz) was found from the NRAO archival data. It is suggested that the X-ray dips represent mass ejection due to the evacuation of matter from an accretion disk around the black hole and that a super-position of a large number of such dip events leads to production of huge radio jet in GRS 1915+105. | en |
dc.language.iso | en | en |
dc.publisher | Elsevier B.V. | en |
dc.relation.uri | http://adsabs.harvard.edu/abs/2001AdSpR..28..355A | en |
dc.relation.uri | http://dx.doi.org/10.1016/S0273-1177(01)00432-X | en |
dc.rights | 2001 Elsevier B.V. | en |
dc.title | Peculiar x-ray dips in the superluminal source GRS 1915+105 observed in the soft state | en |
dc.type | Article | en |
Appears in Collections: | Research Papers (A&A) |
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2001_Advances in Space Research_V28_p355.pdf Restricted Access | Restricted Access | 521.15 kB | Adobe PDF | View/Open Request a copy |
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