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Related papers: X-Ray Observations of GRS 1915+105

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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

We report here the first results of the spectral and timing analysis of our simultaneous INTEGRAL/RXTE observations of GRS 1915+105. The first observation ever performed with INTEGRAL revealed a new class of variability, where changes of…

Astrophysics · Physics 2007-05-23 J. Rodriguez , D. C. Hannikainen , S. E. Shaw , C. Cabanac , Y. Fuchs

The galactic superluminal motion source GRS 1915+105 has been extensively observed with the RXTE satellite over the last two years. More than 250 RXTE pointings have been performed until mid-May 1998 with more than 1.5 Msec exposure time on…

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

We report on long-term K band photometry of the galactic microquasar GRS 1915+105 since March 1999. We see variations of more than 1 mag, which are seemingly correlated with variations in X-ray intensity and spectral slope.

Astrophysics · Physics 2007-05-23 J. Greiner , F. J. Vrba , A. A. Henden , H. H. Guetter , C. B. Luginbuhl

We present the first results of simultaneous INTEGRAL and RXTE observations of the microquasar GRS 1915+105. We focus on the analysis of the unique highly variable observation and show that we might have observed a new class of variability.…

Astrophysics · Physics 2007-05-23 J. Rodriguez , D. C. Hannikainen , O. Vilhu , Y. Fuchs , S. E. Shaw

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

We combine a complete sample of 113 pointed observations taken with the Rossi X-ray Timing Explorer between 1996-1999, monitoring observations taken with the Ryle telescope and the Green Bank Interferometer, and selected observations with…

Since its discovery in 1992, the superluminal X-ray transient GRS 1915+105 has been extensively observed in an attempt to understand its behaviour. We present here first results from a multi-wavelength campaign undertaken from July to…

A review of recent developments in the field of X-ray surveys, especially in the hard (2-10 and 5-10 keV) bands, is given. A new detailed comparison between the measurements in the hard band and extrapolations from ROSAT counts, that takes…

Astrophysics · Physics 2007-05-23 P. Giommi , F. Fiore , M. Perri

From data obtained from the PCA in the 2-11 keV and 11-30.5 keV energy range, GRS 1915+105 is seen during RXTE observations between 1996 May and October on two separate branches in a hardness intensity diagram. On the hard branch, GRS…

Astrophysics · Physics 2009-10-28 Xingming Chen , Jean H. Swank , Ronald E. Taam

We report on the X-ray spectral behavior within the steady states of GRS 1915+105. Our work is based on the full data set on the source obtained using the Proportional Counter Array on the Rossi X-ray Timing Explorer and 15 GHz radio data…

High Energy Astrophysical Phenomena · Physics 2016-05-25 Charith S. Peris , Ronald A. Remillard , James F. Steiner , Saeqa D. Vrtilek , Peggy Varniere , Jerome Rodriguez , Guy Pooley

We present the result of multi-wavelength observations of the microquasar GRS 1915+105 in a plateau state with a luminosity of ~7.5x10^{38) erg s-1 (~40% L_Edd), conducted simultaneously with the INTEGRAL and RXTE satellites, the ESO/NTT,…

We present the results of a detailed analysis of RXTE observations which show an unusual state transition between high-soft and low-soft states in the microquasar GRS 1915+105. The RXTE pointed observations reveal that these events appeared…

Astrophysics · Physics 2007-05-23 S. Naik , A. R. Rao , Sandip K. Chakrabarti

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

(abridged) This is the second paper presenting the results of two years of monitoring of GRS 1915+105 with \integral and \rxte and the Ryle Telescope. We present the X-ray spectral and temporal analysis of four observations which showed…

In this study, we undertake a spectral-timing analysis of the black hole X-ray binary source GRS 1915+105 using simultaneous observations carried out by AstroSat (LAXPC and SXT) and NICER in 2017. The source showed two flux levels (high and…

High Energy Astrophysical Phenomena · Physics 2024-08-07 Ruchika Dhaka , Ranjeev Misra , JS Yadav , Pankaj Jain

It is now ten years since the first microquasar GRS 1915+105 was discovered. More than six years of observations with RossiXTE have shown a level of variability never observed in any other X-ray source. Here I try to address some issues,…

Astrophysics · Physics 2007-05-23 Tomaso Belloni

The results of X-ray observations of Galactic superluminal jet source GRS 1915+105 during its low luminosity state and state transitions in October, 1996 - April, 1997 with PCA and HEXTE instruments aboard Rossi X-ray Timing Explorer (RXTE)…

Astrophysics · Physics 2007-05-23 S. Trudolyubov , E. Churazov , M. Gilfanov

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 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
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