Search Publications
Energetic electron signatures in an active magnetotail plasma sheet
Grande, M.; Davies, J. A.; Fazakerley, A. N. +10 more
Particles with energies of tens to hundreds of keV provide a powerful diagnostic of the acceleration processes that characterise the Earth's magnetosphere, in particular the highly dynamic nightside plasma sheet. Such energetic particles can be detected by the RAPID experiment, onboard the quartet of Cluster spacecraft. We present results from the…
Search for cyclotron lines in INTEGRAL/SPI spectra of Vela X-1
von Kienlin, A.; Schanne, S.; Kretschmar, P. +5 more
The wind-accreting X-ray binary pulsar Vela X-1 has been observed during the two INTEGRAL Core Program observations of the Vela region in June July and November December 2003. Preliminary results on time averaged and time resolved spectra of INTEGRAL/SPI for the two observation epochs are presented. Time averages have been used in order to increas…
Two years of INTEGRAL result on X-ray binaries
Ubertini, P.; ISWT Survey Team
INTEGRAL is the ESA lead International Gamma-Ray Astrophysical Laboratory, successfully launched the 17th October 2002 from Baikonur with a Proton vehicle. In view of the high sensitivity of the two γ-ray instruments IBIS and SPI and their capability to provide at the same time image, spectra and time profiles of all the sources in their wide fiel…
INTEGRAL: New perspectives for astrophysical nucleospectroscopy
Diehl, Roland
The high-energy spectrum of Cygnus X-1 as measured by INTEGRAL
Goldoni, P.; Rodriguez, J.; Malzac, J. +6 more
The INTEGRAL satellite observed the binary black hole system Cygnus X-1 on 2003 June 7 11. The source was detected up to 800 keV, its spectrum beeing compatible with a power law of photon index 2.3. In the framework of the accreting black hole phenomenology, the source was in an unusual state, probably the so-called “intermediate state”. Using the…
X-ray and Gamma-ray properties of AGN: Results from XMM-Newton, Chandra and INTEGRAL
Komossa, Stefanie
The X-ray observatories XMM-Newton and Chandra provided a wealth of exciting new results on active galaxies, and many more are expected to emerge soon from the Gamma-ray mission INTEGRAL. Chandra delivered X-ray images of outstanding detail, reaching subarcsecond spatial resolution for the first time in X-ray astronomy. XMM-Newton with its high se…
A systematic analysis of X-ray afterglows of gamma-ray burst observed by XMM-Newton
Piro, Luigi; de Pasquale, Massimiliano; Gendre, Bruce
This work is part of a systematic re-analysis program of all the data of gamma-ray burst (GRB) X-ray afterglows observed so far, in order to constrain the GRB models. We present here a systematic analysis of those afterglows observed by XMM-Newton between January 2000 and March 2004. This dataset includes GRB 011211 and GRB 030329. We have obtaine…
Physical parameters of the plasma tail of Rosetta target comet 67P/Churyumov-Gerasimenko
Churyumov, K. I.
On the basis of photometric processing of the two large scale photographic images of comet 67P obtained in Nizhny Arkhyz with the help of the 6-BTA reflector of SAO of RAS and using the diffusion model of L. Shulman and H. Nazarchuk some physical parameters of magnetic field of the comet plasma tail (coefficients of diffusion and induction of magn…
26Al spectroscopy with SPI: The challenge to detect Galactic rotation
Strong, A. W.; Hartmann, D. H.; Diehl, R. +1 more
The shape of the γ-ray line from radioactive 26Al, at 1808.7 keV energy in the frame of the decaying isotope, is determined by its kinematics when it decays, typically 10 6 yr after its ejection into the interstellar medium from its nucleosynthesis source. Three prior measurements of the line width exist: HEAO-C's 1982 value …
Understanding the relativistic accretion disk of GRS 1915 + 105
Belloni, Tomaso; Matt, Giorgio; Karas, Vladimír +2 more
We discuss the evidence for GRS 1915 + 105 hosting an optically thick, relativistic accretion disk (at least in some spectral phases). We give particular emphasis to the iron line phenomenology.