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Three different types of very intense, quasi-regular X-ray bursts have been observed from the Galactic superluminal X-ray transient source GRS 1915+105 with the Pointed Proportional Counters of the Indian X-ray Astronomy Experiment onboard…

Astrophysics · Physics 2009-10-30 B. Paul , P. C. Agrawal , A. R. Rao

We present results of our analysis of a set of RXTE/PCA observations of X-ray flares/bursts with burst cycle ranging from 30 to 1300 s from the Galactic X-ray transient source GRS 1915+105 during last four years. These flares/bursts can be…

Astrophysics · Physics 2007-05-23 J. S. Yadav , A. R. Rao

The galactic micro-quasar source GRS 1915+105 has been observed with the Indian X-ray Astronomy Experiment (IXAE) several times over a period extending from 1996 to 2000. The source has been observed in different luminosity states and…

Astrophysics · Physics 2007-05-23 S. Naik , P. C. Agrawal , B. Paul , A. R. Rao , J. S. Yadav , S. Seetha

The galactic superluminal transient X-ray source GRS 1915+105 was observed with the pointed proportional counters (PPCs) onboard the Indian satellite IRS-P3 during 1996 July 23-27. We report here details of the behavior of this source…

Astrophysics · Physics 2009-10-30 B. Paul , P. C. Agrawal , A. R. Rao

We have analyzed publicly available RXTE/PCAs archival data of GRS 1915+105 during its burst/flaring state. The burst cycle ranges from 30 to 1300 s. These bursts are different from the type I and type II classical bursts seen in Low Mass…

Astrophysics · Physics 2009-11-06 J. S. Yadav , A. R. Rao

We report on extensive X-ray observations of the galactic superluminal motion source GRS 1915+105 with the RXTE satellite over the last year. More than 130 RXTE pointings have been performed. GRS 1915+105 displays drastic X-ray intensity…

Astrophysics · Physics 2009-10-30 J. Greiner , E. Morgan , R. Remillard

The superluminal X-ray transient source GRS 1915+105 was observed during July 20-29, 1996 with the Indian X-ray Astronomy Experiment (IXAE) on the Indian satellite IRS-P3 launched on March 21, 1996 from Shriharikota Range in India. During…

Astrophysics · Physics 2007-05-23 B. Paul , P. C. Agrawal , A. R. Rao

We present a detailed X-ray study of the microquasar GRS 1915+105 during a variability class transition observed in 2000 June with the PPCs of the Indian X-ray Astronomy Experiment. We supplement this observation with data from the RXTE…

Astrophysics · Physics 2009-11-07 S. Naik , P. C. Agrawal , A. R. Rao , B. Paul

The galactic superluminal motion source GRS 1915+105 was observed with RXTE at several occasions during its ongoing active state. The observed X-ray intensity changes drastically on a variety of time scales ranging from sub-seconds to days.…

Astrophysics · Physics 2007-05-23 J. Greiner , E. H. Morgan , R. A. Remillard

We examine the X-ray spectral and temporal behavior of the Galactic black hole candidate source GRS 1915+105 during its spectral state transition observed in 1997 March - August. The source was making a slow transition from a low-hard state…

Astrophysics · Physics 2009-10-31 A. R. Rao , J. S. Yadav , B. Paul

The light curves of GRS 1915+105 observed with RXTE on October 15, 1996 reveal a wide range of transient activity including regular bursts with a recurrence time of about 1 minute, irregular bursts, and dips. In contrast to bursts from…

Astrophysics · Physics 2009-10-30 Ronald E. Taam , Xingming Chen , Jean H. Swank

Monitoring with the Ryle Telescope at 15 GHz of the Galactic X-ray transient source GRS 1915+105 has revealed a remarkable range of rapid and extended flares which appear to be related to the X-ray emission as recorded by the RXTE all-sky…

Astrophysics · Physics 2007-05-23 G. G. Pooley , R. P. Fender

GS 0836-429 is a neutron star X-ray transient that displays Type-I X-ray bursts. In 2003 and 2004 it experienced two outbursts in X-rays. We present here an analysis of the system bursting properties during these outbursts. We studied the…

High Energy Astrophysical Phenomena · Physics 2016-02-10 E. Aranzana , C. Sánchez-Fernández , E. Kuulkers

We present a temporal analysis of a BeppoSAX observation of GRS 1915+105 performed on April 13, 1999 when the source was in the rho class, which is characterised by quasi-regular bursting activity. The aim of the present work is to confirm…

High Energy Astrophysical Phenomena · Physics 2016-01-27 T. Mineo , F. Massa , E. Massaro , A. D'Ai

For the first time X-ray bursts have been detected from a sky position consistent with the one of GRS 1741.9-2853, a GRANAT transient source located only ~10' from the Galactic Centre. A total of 3 bursts have been observed by the Wide…

Astrophysics · Physics 2007-05-23 M. Cocchi , A. Bazzano , L. Natalucci , P. Ubertini , J. Heise , J. M. Muller , J. J. M. in 't Zand

Using the data of 5 years of RXTE observations we investigate the X-ray spectral and timing properties of GRS 1915+105 during the hard steady states. According to the results of our simultaneous X-ray spectral and timing analysis the…

Astrophysics · Physics 2009-11-06 Sergey P. Trudolyubov

The light curve of the galactic micro-quasar GRS 1915+105 changes in at least thirteen different ways which are called classes. We present examples of the transitions from one class to another as observed by the IXAE instrument aboard the…

We present data on the monitoring of the Galactic X-ray transient GRS 1915+105 at 15 GHz with the Ryle Telescope. We have found quasi-periodic oscillations with periods in the range 20-40 min which are tentatively associated with the…

Astrophysics · Physics 2015-06-24 G. G. Pooley , R. P. Fender

The Galactic black hole transient GRS1915+105 is famous for its markedly variable X-ray and radio behaviour, and for being the archetypal galactic source of relativistic jets. It entered an X-ray outburst in 1992 and has been active ever…

High Energy Astrophysical Phenomena · Physics 2021-03-03 S. E. Motta , J. J. E. Kajava , M. Giustini , D. R. A. Williams , M. Del Santo , R. Fender , D. A. Green , I. Heywood , L. Rhodes , A. Segreto , G. Sivakoff , P. A. Woudt

Multiple near-infrared wavelengths observations, carried out since 1993 on the galactic superluminal source of relativistic ejections GRS 1915+105, have yielded three important results. 1) The infrared counterpart of GRS 1915+105 exhibits…

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