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Two spectral states of the transient X-ray burster SAX J1747.0-2853
L. Natalucci, A. Bazzano, M. Cocchi +4
The neutron star binary SAX J1747.0-2853, located in the Galactic Center region at about 0.5 deg from Sgr A* and at a distance of 9 kpc, has been observed in outburst four times (1…
Detection of hard X-ray emission from the Galactic nuclear region with INTEGRAL
G. Belanger, A. Goldwurm, P. Goldoni +13
This letter presents the first results of an observational campaign to study the Galactic Centre with INTEGRAL. The mosaicked images obtained with the IBIS/ISGRI coded aperture ins…
IBIS preliminary results on Cygnus X-1 spectral and temporal characteristics
A. Bazzano, A. J. Bird, F. Capitanio +11
We report preliminary results of a broadband spectral and temporal study of the black-hole binary Cyg X-1 performed with the IBIS telescope. Cyg X-1 was the first pointed celestial…
Systematic effects induced on IBIS detectors by background and inhomogeneity of the spatial response
L. Natalucci, A. J. Bird, A. Bazzano +4
The spatial distribution of the background events may affect the source detection capability of IBIS at high energies (> 200 keV) for both ISGRI and PICsIT layers. The observed bac…
IBIS performances during the Galactic Plane Scan - I. The Cygnus region
M. Del Santo, J. Rodriguez, P. Ubertini +8
The Plane of our Galaxy is regularly observed by the INTEGRAL satellite by means of scheduled scans. We present here results from the IBIS/ISGRI instrument using data from the firs…
GRB 021219: the first Gamma-Ray Burst localized in real time with IBAS
S. Mereghetti, D. Gotz, V. Beckmann +5
On December 19, 2002, during the Performance and Verification Phase of INTEGRAL, a Gamma-Ray Burst (GRB) has been detected and localized in real time with the INTEGRAL Burst Alert…