916 citations · 7.8k across the 243 of their papers we have counts for
116 papers · 1 filter
Unveiling the high energy tail of 1E 1740.7-2942 with INTEGRAL
L. Bouchet, M. Del Santo, E. Jourdain +4
The microquasar 1E 1740.7-2942 is observed with Integral since Spring 2003. Here, we report on the source high energy behaviour by using the first three years of data collected wit…
Renewed activity from the X-ray transient SAXJ 1810.8-2609 with INTEGRAL
M. Fiocchi, L. Natalucci, J. Chenevez +8
We report on the results of INTEGRAL observations of the neutron star low mass X-ray binary SAX J1810.8-2609 during its latest active phase in August 2007. The current outburst is…
Unveiling the nature of INTEGRAL objects through optical spectroscopy. VII. Identification of 20 Galactic and extragalactic hard X-ray sources
N. Masetti, P. Parisi, E. Palazzi +17
Within the framework of our program of assessment of the nature of unidentified or poorly known INTEGRAL sources, we present here spectroscopy of optical objects, selected through…
Discovery of a 30 day period in the supergiant fast X-ray transient SAX J1818.6-1703
A. J. Bird, A. Bazzano, A. B. Hill +4
SAX J1818.6-1703 has been characterised as a Supergiant Fast X-ray Transient system on the basis of several INTEGRAL/IBIS detections since the original BeppoSAX Wide Field Camera d…
Hard X-ray observations of PSR J1833-1034 and its associated pulsar wind nebula
A. De Rosa, P. Ubertini, R. Campana +3
PSR J1833-1034 and its associated Pulsar Wind Nebula (PWN) has been investigated in depth through X-ray observations ranging from 0.1 to 200 keV. The low energy X-ray data from Cha…
Broad-band X-ray spectral evolution of GX 339-4 during a state transition
M. Del Santo, T. M. Belloni, J. Homan +8
We report on X-ray and soft gamma-ray observations of the black-hole candidate GX 339-4 during its 2007 outburst, performed with the RXTE and INTEGRAL satellites. The hardness-inte…
The INTEGRAL long monitoring of persistent Ultra Compact X-ray Bursters
M. Fiocchi, A. Bazzano, P. Ubertini +3
The combination of compact objects, short period variability and peculiar chemical composition of the Ultra Compact X-ray Binaries make up a very interesting laboratory to study ac…
INTEGRAL/IBIS and Swift/XRT observations of hard cataclysmic variables
R. Landi, L. Bassani, A. J. Dean +5
The analysis of the third INTEGRAL/IBIS survey has revealed several new cataclysmic variables, most of which turned out to be intermediate polars, thus confirming that these object…
The two INTEGRAL X-ray transients IGR J17091--3624 and IGR J17098--3628: a multi-wavelength long term campaign
F. Capitanio, M. Giroletti, M. Molina +7
IGR J17091-3624 and IGR J17098-3628 are two X-ray transients discovered by INTEGRAL and classified as possible black hole candidates (BHCs). We present here the results obtained fr…
Multiwavelength observations of 3C 454.3. I. The AGILE 2007 November campaign on the "Crazy Diamond"
S. Vercellone, A. W. Chen, V. Vittorini +68
[Abridged] We report on a multiwavelength observation of the blazar 3C 454.3 (which we dubbed "crazy diamond") carried out on November 2007 by means of the astrophysical satellites…
INTEGRAL and BeppoSAX observations of the transient atoll source 4U 1608-522: from quiescent to hard spectral state
Antonella Tarana, Angela Bazzano, Pietro Ubertini
In this paper we report on the spectral evolution of 4U 1608-522 performed as part of the long Galactic Bulge monitoring with INTEGRAL. The data set include the April 2005 outburst…
INTEGRAL and Swift/XRT observations of the SFXT IGR J16479-4514: from quiescence to fast flaring activity
V. Sguera, L. Bassani, R. Landi +6
Context: IGR J16479-4514 is a fast X-ray transient known to display flares lasting typically a few hours. Recently, its counterpart has been identified with a supergiant star, ther…
Correlating the WFC and the IBIS hard X-ray surveys
Fiamma Capitanio, Antony J. Bird, Memmo Federici +2
During the operational life of BeppoSax, the Wide Field Camera observations covered almost the full sky at different epochs. The energy coverage, wide field of view and imaging cap…
Sub-luminous X-ray Bursters Unveiled with INTEGRAL
M. Del Santo, L. Sidoli, P. Romano +5
In 2005 March 22nd, the INTEGRAL satellite caught a type-I X-ray burst from the unidentified source XMMU J174716.1-281048, serendipitously discovered with XMM-Newton in 2003. Based…
Unveiling the nature of INTEGRAL objects through optical spectroscopy. VI. A multi-observatory identification campaign
N. Masetti, E. Mason, L. Morelli +18
Using 8 telescopes in the northern and southern hemispheres, plus archival data from two on-line sky surveys, we performed a systematic optical spectroscopic study of 39 putative c…
INTEGRAL high energy sky: The keV to MeV cosmic sources
P. Ubertini, A. De Rosa, A. Bazzano +2
After almost 5 years of operation, ESA's International Gamma-Ray Astrophysics Laboratory (INTEGRAL) Space Observatory has unveiled a new soft Gamma ray sky and produced a remarkabl…
High-redshift blazar identification for Swift J1656.3-3302
N. Masetti, E. Mason, R. Landi +9
We report on the high-redshift blazar identification of a new gamma-ray source, Swift J1656.3-3302, detected with the BAT imager onboard the Swift satellite and the IBIS instrument…
Probing the nature of IGR J16493-4348: Spectral and temporal analysis of the 1-100 keV emission
A. B. Hill, A. J. Dean, R. Landi +5
IGR J16493-4348 was one of the first new sources to be detected by the INTEGRAL gamma-ray telescope in the 18-100 keV energy band. Based upon spatial coincidence the source was ori…
INTEGRAL observations of PSR J1811-1925 and its associated Pulsar Wind Nebula
A. J. Dean, A. De Rosa, V. A. McBride +6
We present spectral measurements made in the soft (20-100 keV) gamma-ray band of the region containing the composite supernova remnant G11.2-0.3 and its associated pulsar PSR J1811…
INTEGRAL detection of the pulsar wind nebula in PSR J1846-0258
V. A. McBride, A. J. Dean, A. Bazzano +6
We communicate the detection of soft (20--200 keV) gamma-rays from the pulsar and pulsar wind nebula of PSR J1846-0258 and aim to identify the component of the system which is resp…
SAXJ1712.6-3739: a persistent hard X-ray source as monitored with INTEGRAL
Mariateresa Fiocchi, Angela Bazzano, Pietro Ubertini +1
The X-ray source SAXJ1712.6-3739 is a very weak Low Mass X-ray Binary discovered in 1999 with BeppoSAX and located in the Galactic Center. This region has been deeply investigated…
Long term monitoring of the BHC 1E 1740.7-2942
M. Del Santo, A. Bazzano, N. Bezayiff +4
The microquasar 1E 1740.7-2942 is one of the most appealing source of the Galactic Centre region. The high energy feature detected once by SIGMA has been searched in the last years…
Monitoring of Transient Black Hole Candidates observed in the INTEGRAL survey
F. Capitanio, A. Bazzano, A. J. Bird +2
The INTEGRAL/IBIS survey was performed collecting all the GPS and GCDE data together with all the available public data . The second catalogue, published in 2006 by Bird et al., is…
IGR J22517+2218=MG3 J225155+2217: a new gamma-ray lighthouse in the distant Universe
L. Bassani, R. Landi, A. Malizia +7
We report on the identification of a new soft gamma ray source, namely IGR J22517+2218, detected with IBIS/INTEGRAL. The source, which has an observed 20-100 keV flux of ~4 x10^-11…