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Unveiling the nature of INTEGRAL objects through optical spectroscopy. III. Observations of seven southern sources
N. Masetti, M. L. Pretorius, E. Palazzi +9
Context. The detection, thanks to the INTEGRAL satellite, of a number of new hard X-ray sources calls for the identification of their nature by means of observations at longer wave…
INTEGRAL/IBIS Extragalactic survey: 20-100 keV selected AGN
L. Bassani, M. Molina, A. Malizia +10
Analysis of INTEGRAL Core Program and public Open Time observations performed up to April 2005 provides a sample of 62 active galactic nuclei in the 20-100 keV band above a flux li…
INTEGRAL observation of the X-ray burster KS 1741-293
G. De Cesare, A. Bazzano, G. Stratta +3
KS 1741-293 was firstly detected in 1989 with the X-ray wide field camera TTM (3-10 keV) on board of the Rontgen-Kvant-Mir observatory. During these observations this source exhibi…
INTEGRAL high energy behaviour of 4U 1812-12
A. Tarana, A. Bazzano, P. Ubertini +5
The low mass X-ray binary system 4U 1812-12 was monitored with the INTEGRAL observatory in the period 2003-2004 and with BeppoSAX on April 20, 2000. We report here on the spectral…
X-ray and soft gamma-ray behaviour of the Galactic source 1E 1743.1-2843
M. Del Santo, L. Sidoli, A. Bazzano +4
The X-ray persistent source 1E 1743.1-2843, located in the Galactic Centre region, has been detected by all X-ray telescope above 2 keV, whereas it is not visible in the soft X-ray…
Unveiling the nature of INTEGRAL objects through optical spectroscopy. II. The nature of four unidentified sources
N. Masetti, E. Mason, L. Bassani +9
We present the results of our optical spectrophotometric campaign ongoing at the Astronomical Observatory of Bologna in Loiano (Italy) on hard X-ray sources detected by INTEGRAL. W…