Publications (226)
Soft X and Gamma ray emission from TeV sources observed with Swift and INTEGRAL
A. De Rosa, P. Ubertini, A. Bazzano +4
The soft X-ray and soft gamma observations of the new discovered TeV sources by HESS and MAGIC are crucial to discriminate between various emitting scenarios and to fully understan…
The brightest gamma-ray flaring blazar in the sky: AGILE and multi-wavelength observations of 3C 454.3 during November 2010
S. Vercellone, E. Striani, V. Vittorini +84
Since 2005, the blazar 3C 454.3 has shown remarkable flaring activity at all frequencies, and during the last four years it has exhibited more than one gamma-ray flare per year, be…
Narrow Line Seyfert 1 galaxies at hard X-rays
F. Panessa, A. De Rosa, L. Bassani +7
Narrow Line Seyfert 1 (NLSy1) galaxies are a peculiar class of type 1 AGN (BLSy1). The X-ray properties of individual objects belonging to this class are often extreme and associat…
Soft gamma-ray optics: new Laue lens design and performance estimates
N. Barriere, L. Natalucci, N. Abrosimov +7
Laue lenses are an emerging technology based on diffraction in crystals that allows the concentration of soft gamma rays. This kind of optics that works in the 100 keV - 1.5 MeV ba…
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…
The IBIS soft gamma-ray sky after 1000 INTEGRAL orbits
A. J. Bird, A. Bazzano, A. Malizia +6
We report here an all-sky soft gamma-ray source catalog based on IBIS observations performed during the first 1000 orbits of INTEGRAL. The database for the construction of the sour…
XMMU J174716.1-281048: a "quasi-persistent" very faint X-ray transient?
M. Del Santo, L. Sidoli, S. Mereghetti +3
The X-ray transient XMMU J174716.1-281048 was serendipitously discovered with XMM-Newton in 2003. It lies about 0.9 degrees off the Galactic Centre and its spectrum shows a high ab…
GRB 040403: a faint X-ray rich Gamma-ray Burst discovered by INTEGRAL
S. Mereghetti, D. Gotz, M. I. Andersen +13
GRB 040403 is one of the faintest gamma-ray bursts for which a rapid and accurate localization has been obtained. Here we report on the gamma-ray properties of this burst, based on…
Discovery of the INTEGRAL X/Gamma-ray transient IGR J00291+5934: a Comptonised accreting ms pulsar ?
S. E. Shaw, N. Mowlavi, J. Rodriguez +8
We report the discovery of a high-energy transient with the IBIS/ISGRI detector on board the INTEGRAL observatory. The source, namely IGR J00291+5934, was first detected on 2nd Dec…
BL Lacertae identifications in a ROSAT-selected sample of Fermi unidentified objects
N. Masetti, B. Sbarufatti, P. Parisi +15
The optical spectroscopic followup of 27 sources belonging to a sample of 30 high-energy objects selected by positionally cross correlating the first Fermi/LAT Catalog and the ROSA…
High-energy observations of the state transition of the X-ray nova and black hole candidate XTE J1720-318
M. Cadolle Bel, J. Rodriguez, P. Sizun +13
We report the results of extensive high-energy observations of the X-ray transient and black hole candidate XTE J1720-318 performed with INTEGRAL, XMM-Newton and RXTE. The source,…
First results from the INTEGRAL Galactic plane scans
C. Winkler, N. Gehrels, V. Schoenfelder +12
Scans of the Galactic plane performed at regular intervals constitute a key element of the guaranteed time observations of the INTEGRAL observing programme. These scans are done fo…
The INTEGRAL/IBIS AGN catalogue: an update
A. Malizia, R. Landi, M. Molina +4
In the most recent IBIS survey based on observations performed during the first 1000 orbits of INTEGRAL, are listed 363 high energy emitters firmly associated with AGN, 107 of whic…
Review on Active Galactic Nuclei at hard X-ray energies
Loredana Bassani, M. Molina, A. Malizia +6
Hard X-ray surveys are an important tool for the study of active galactic nuclei (AGN): they provide almost an unbiased view of absorption in the extragalactic population, allow th…
IGR J18249-3243: a new GeV-emitting FR II and the emerging population of high energy radio galaxies
G. Bruni, L. Bassani, M. Persic +10
The advent of new all-sky radio surveys such as the VLA Sky Survey (VLASS) and the Rapid ASKAP Continuum Survey (RACS), performed with the latest generation radio telescopes, is op…
FERMI transient J1544-0649: a flaring radio-weak BL Lac
G. Bruni, F. Panessa, G. Ghisellini +6
On May 15th, 2017, the \emph{FERMI}/LAT gamma-ray telescope observed a transient source not present in any previous high-energy catalogue: J1544-0649. It was visible for two consec…
The INTEGRAL view of Gamma-Ray Bursts
P. Ubertini, A. Corsi, S. Foley +3
After more than six and half years in orbit, the ESA space observatory INTEGRAL has provided new, exciting results in the soft gamma-ray energy range (from a few keV to a few MeV).…
SAX J1810.8-2609: an X-ray bursting transient
M. Cocchi, A. Bazzano, L. Natalucci +5
We report on the BeppoSAX/WFC observation of a strong type-I X-ray burst from the recently discovered transient source SAX J1810.8-2609. The observed event showed evidence of photo…
The nature of the ASCA/INTEGRAL source AX J183039-1002: a new Compton-thick AGN?
L. Bassani, R. Landi, R. Campana +6
We report on the identification of the X/soft gamma-ray source AX J183039-1002 detected with ASCA and INTEGRAL/IBIS. The source, which has an observed 20-100 keV flux of about 8.6…
IGR J18483-0311: an accreting X-ray pulsar observed by INTEGRAL
V. Sguera, A. B. Hill, A. J. Bird +8
IGR J18483-0311 is a poorly known transient hard X-ray source discovered by INTEGRAL during observations of the Galactic Center region performed between 23--28 April 2003. Aims: To…
Looking for blazars in a sample of unidentified high-energy emitting Fermi sources
E. J. Marchesini, N. Masetti, V. Chavushyan +12
Context. Based on their overwhelming dominance among associated Fermi gamma ray catalogue sources, it is expected that a large fraction of the unidentified Fermi objects are blazar…
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…
Unveiling the nature of INTEGRAL objects through optical spectroscopy. IX. 22 more identifications, and a glance into the far hard X-ray Universe
N. Masetti, P. Parisi, E. Jimenez-Bailon +14
(Abridged) Since its launch in October 2002, the INTEGRAL satellite has revolutionized our knowledge of the hard X-ray sky thanks to its unprecedented imaging capabilities and sour…
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…
GRB021125: the first GRB imaged by INTEGRAL
G. Malaguti, A. Bazzano, V. Beckmann +12
In the late afternoon of November 25, 2002 a gamma-ray burst (GRB) was detected in the partially coded field of view (about 7.3 deg from the centre) of the imager IBIS on board the…
Spectral analysis of the Low-Mass X-ray Binary 4U~1705--44
M. Fiocchi, A. Bazzano, P. Ubertini +1
\integral and \sax observations of the neutron-star LMXB 4U~1705--44 have been analysed to deeply investigate the spectral state transitions nature. Its energy spectrum can be desc…
The 4th IBIS/ISGRI soft gamma-ray survey catalog
A. J. Bird, A. Bazzano, L. Bassani +19
In this paper we report on the fourth soft gamma-ray source catalog obtained with the IBIS gamma-ray imager on board the INTEGRAL satellite. The scientific dataset is based on more…
Unveiling the nature of INTEGRAL objects through optical spectroscopy. V. Identification and properties of 21 southern hard X-ray sources
N. Masetti, L. Morelli, E. Palazzi +13
Optical spectroscopic identification of the nature of 21 unidentified southern hard X-ray objects is reported here in the framework of our campaign aimed at determining the nature…
BeppoSAX observations of the nearby low-mass X-ray binary and fast transient SAX J1819.3-2525
J. J. M. in 't Zand, E. Kuulkers, A. Bazzano +7
SAX J1819.3-2525 is a nearby X-ray transient which exhibited a fast and large X-ray outburst on Sep. 15, 1999 (Smith et al. 1999). The Wide Field Cameras and the Narrow Field Instr…
Global characteristics of the first IBIS/ISGRI catalogue sources: unveiling a murky episode of binary star evolution
A. J. Dean, A. Bazzano, A. B. Hill +10
INTEGRAL is the first gamma-ray astronomy mission with a sufficient sensitivity and angular resolution combination appropriate to the detection and identification of considerable n…
Discovery of type-I X-ray bursts from GRS 1741.9-2853
M. Cocchi, A. Bazzano, L. Natalucci +4
For the first time X-ray bursts have been detected from a sky position consistent with the one of GRS 1741.9-2853, a GRANAT transient source located only ~10' from the Galactic Cen…
The INTEGRAL/IBIS source AXJ1838.0-0655: a soft X-ray to TeV gamma-ray broad band emitter
A. Malizia, L. Bassani, J. B. Stephen +8
We report on INTEGRAL observations of AX J1838.0-0655, one of the unidentified objects listed in the first IBIS/ISGRI survey catalogue and located in the Scutum arm region. This ob…
An X-ray view of the INTEGRAL/IBIS blazars
S. Gianni', A. De Rosa, L. Bassani +3
Aim of this work is a broad-band study with INTEGRAL, Swift and XMM-Newton satellites of a sample of 9 blazars (7 FSRQ and 2 BL Lac) with redshift up to about 4. The spectral analy…
INTEGRAL high energy detection of the transient IGR J11321-5311
V. Sguera, A. Bazzano, A. J. Bird +5
Context: The transient hard X-ray source IGR J11321-5311 was discovered by INTEGRAL on June 2005, during observations of the Crux spiral arm. To date, this is the only detection of…
Where are Compton-thick radio galaxies? A hard X-ray view of three candidates
F. Ursini, L. Bassani, F. Panessa +4
We present a broad-band X-ray spectral analysis of the radio-loud active galactic nuclei NGC 612, 4C 73.08 and 3C 452, exploiting archival data from NuSTAR, XMM-Newton, Swift and I…
The INTEGRAL/IBIS Complete Sample of Type 1 AGN
Manuela Molina, L. Bassani, A. Malizia +3
The determination of the broad (0.1-100 keV) spectra of active galaxies is crucial for understanding and discriminating among emission models, for estimating the properties of the…
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…
Control and read-out of the HEPD-02 tracking system onboard CSES-02 satellite
S. Bartocci, R. Battiston, S. Beolè +42
The High Energy Particle Detector (HEPD-02) is a payload of the second China Seismo-Electromagnetic Satellite (CSES-02), designed and built by the Italian Limadou collaboration. It…
The Soft X-ray Imager on board EXIST
L. Natalucci, A. Bazzano, F. Panessa +11
The Soft X-ray Imager (SXI) is one of the three instruments on board EXIST, a multi-wavelength observatory in charge of performing a global survey of the sky in hard X-rays searchi…
"Clocked" Bursts From GS 1826-238
M. Cocchi, A. Bazzano, L. Natalucci +5
We report on the long term monitoring of the GINGA transient source GS 1826-238 performed with the BeppoSAX Wide Fiels Camera (WFC) instrument, during four different observing camp…
EXIST perspective for Supergiant Fast X-ray Transients
L. Sidoli, V. Sguera, A. Bazzano +1
Supergiant Fast X-ray Transients (SFXTs) are one of the most intriguing (and unexpected) results of the INTEGRAL mission. They are a new class of High Mass X-ray Binaries involving…
The first outburst of SAX J1808.4-3658 revisited
J. J. M. in 't Zand, R. Cornelisse, E. Kuulkers +8
Data of the 1996 outburst of the single-known accreting millisecond pulsar SAX J1808.4-3658, taken with the Wide Field Cameras (WFCs) on BeppoSAX, are revisited with more complete…
X-ray absorption in INTEGRAL AGN: Host galaxy inclination
A. Malizia, L. Bassani, J. B. Stephen +2
In this work the INTEGRAL hard X-ray selected sample of AGN has been used to investigate the possible contribution of absorbing material distributed within the host galaxies to the…
Six years of BeppoSAX Wide Field Cameras observations of nine galactic type-I X-ray bursters
R. Cornelisse, J. J. M. in 't Zand, F. Verbunt +7
We present an overview of BeppoSAX Wide Field Cameras observations of the nine most frequent type-I X-ray bursters in the Galactic center region. Six years of observations (from 19…
Discovery of the X-ray transient SAX J1808.4-3658, a likely low mass X-ray binary
J. J. M. in 't Zand, J. Heise, J. M. Muller +4
We report the discovery of a fairly bright transient during observations with the Wide Field Cameras on board the BeppoSAX satellite in September 1996. It was detected at a peak in…
The 1.4 GHz radio properties of hard X-ray selected AGN
F. Panessa, A. Tarchi, P. Castangia +7
We have analyzed the NVSS and SUMSS data at 1.4 GHz and 843 MHz for a well defined complete sample of hard X-ray AGN observed by INTEGRAL. A large number (70/79) of sources are det…
INTEGRAL results on the electromagnetic counterparts of gravitational waves
S. Mereghetti, V. Savchenko, C. Ferrigno +18
Thanks to its high orbit and a set of complementary detectors providing continuous coverage of the whole sky, the INTEGRAL satellite has unique capabilities for the identification…
Bright X-ray bursts from 1E 1724-3045 in Terzan 2
M. Cocchi, A. Bazzano, L. Natalucci +4
During about 3 years wide field monitoring of the Galactic Center region by the WFC telescopes on board the BeppoSAX satellite, a total of 14 type-I X-ray bursts were detected from…
Modeling the flaring activity of the high z, hard X-ray selected blazar IGR J22517+2217
G. Lanzuisi, A. De Rosa, G. Ghisellini +6
We present new Suzaku and Fermi data, and re-analyzed archival hard X-ray data from INTEGRAL and Swift-BAT survey, to investigate the physical properties of the luminous, high-reds…
Hard tail detection in the LMXB 4U1636-53 from INTEGRAL
M. Fiocchi, A. Bazzano, P. Ubertini +1
Recent INTEGRAL observations and archival BeppoSAX data have been analyzed to deeply investigate the hard X-ray behavior of the neutron star, atoll type, low mass X-ray Binary 4U16…
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…
1E 1740.7-2942: temporal and spectral evolution from INTEGRAL and RXTE observations
M. Del Santo, A. Bazzano, A. A. Zdziarski +13
We present results of the monitoring of the black hole candidate 1E 1740.7-2942 with INTEGRAL, in combination with simultaneous observations by RXTE. We concentrate on broad-band s…
IGR J16328-4726: a new candidate Supergiant Fast X-ray Transient
M. Fiocchi, V. Sguera, A. Bazzano +4
The unidentified source IGR J16328-4726 was covered with INTEGRAL observations for a long period (~9.8Ms) and was undetectable for most of the time while showing a very recurrent m…
Five new INTEGRAL unidentified hard X-Ray sources uncovered by Chandra
M. Fiocchi, L. Bassani, A. Bazzano +4
The IBIS imager on board INTEGRAL, with a sensitivity better than a mCrab in deep observations and a point source location accuracy of the order of few arcminutes, has localized so…
In flight calibration of the ISGRI camera
Regis Terrier, F. Lebrun, A. Bazzano +12
ISGRI, the IBIS low energy camera (15 keV - 1 MeV) on board INTEGRAL, is the first large CdTe gamma-ray imager in orbit. We present here an overview of the ISGRI in-flight calibrat…
Simultaneous multiwavelength observations of the Low/Hard State of the X-ray transient source SWIFT J1753.5-0127
M. Cadolle Bel, M. Ribo, J. Rodriguez +11
We report the results of simultaneous multiwavelength observations of the X-ray transient source SWIFT J1753.5-0127 performed with INTEGRAL, RXTE, NTT, REM and VLA on 2005 August 1…
Is the INTEGRAL/IBIS source IGR J17204-3554 a gamma-ray emitting galaxy hidden behind the molecular cloud NGC 6334 ?
L. Bassani, A. De Rosa, A. Bazzano +9
We report on the identification of a soft gamma-ray source, IGR J17204-3554, detected with the IBIS imager on board the INTEGRAL satellite. The source has a 20-100 keV flux of ~3x1…
Unveiling the nature of IGR J17177-3656 with X-ray, NIR and Radio observations
A. Paizis, M. A. Nowak, J. Wilms +6
We report on the first broad-band (1-200 keV) simultaneous Chandra-INTEGRAL observations of the recently discovered hard X-ray transient IGR J17177-3656 that took place on 2011, Ma…
Turmoil on the accretion disk of GRO J1655-40
E. Kuulkers, J. J. M. in 't Zand, R. Cornelisse +7
During the 1996/1997 outburst of the X-ray transient GRO J1655-40 the Wide Field Cameras onboard BeppoSAX observed the system with nearly continuous coverage during some stages of…
A discovery of young radio sources in the cores of giant radio galaxies selected at hard X-rays
G. Bruni, F. Panessa, L. Bassani +9
Giant Radio Galaxies (GRG) are the largest single entities in the Universe, having a projected linear size exceeding 0.7 Mpc, which implies that they are also quite old objects. Th…
Finding persistent sources with the BeppoSAX/WFC: a in-depth analysis
F. Capitanio, A. J. Bird, M. Fiocchi +2
During the operational life of the Italian/Dutch X-ray satellite (1996-2002), BeppoSAX, its two Wide Field Cameras performed observations that covered the full sky at different epo…
X-ray and Near Infrared observations of the obscured accreting pulsar IGR J18179-1621
M. A. Nowak, A. Paizis, J. Rodriguez +6
IGR J18179-1621 is an obscured accreting X-ray pulsar discovered by INTEGRAL on 2012 February 29. We report on our 20 ksec Chandra-High Energy Transmission Gratings Spectrometer ob…
First IBIS results on the high energy emission of Cyg X-2
L. Natalucci, M. Del Santo, P. Ubertini +4
The bright low-mass X-ray binary Cyg X-2 was in the field of view of the IBIS telescope during the early Cygnus region observations, executed during the INTEGRAL Performance Verifi…
The coronal temperature of NGC 4388 and NGC 2110 measured with INTEGRAL
F. Ursini, L. Bassani, A. Malizia +4
We aim to measure the physical properties of the hot X-ray corona of two active galactic nuclei, NGC 4388 and NGC 2110. We analysed the hard X-ray (20-300 keV) INTEGRAL spectrum in…
Supplement: Localization and broadband follow-up of the gravitational-wave transient GW150914
B. P. Abbott, R. Abbott, T. D. Abbott +1538
This Supplement provides supporting material for arXiv:1602.08492 . We briefly summarize past electromagnetic (EM) follow-up efforts as well as the organization and policy of the c…
Accurate classification of 28 objects detected in the 39 months Palermo Swift/BAT hard X-ray catalogue
P. Parisi, N. Masetti, E. Jiménez-Bailón +12
Through an optical campaign performed at 4 telescopes located in the northern and the southern hemispheres, plus archival data from two on-line sky surveys, we have obtained optica…
INTEGRAL IBIS, SPI, and JEM-X observations of LVT151012
V. Savchenko, A. Bazzano, E. Bozzo +18
During the first observing run of LIGO, two gravitational wave events and one lower-significance trigger (LVT151012) were reported by the LIGO/Virgo collaboration. At the time of L…
Observations of Eddington-limited type-I X-ray bursts from 4U 1812-12
M. Cocchi, A. Bazzano, L. Natalucci +5
During more than 3 years (August 1996-October 1999) monitoring of a 40x40 degree sky region around the Galactic Centre by the Wide Field Cameras on board BeppoSAX, a total of 8 typ…
Using the ROSAT Bright Source Catalogue to find Counterparts for IBIS/ISGRI Survey Sources
J. B. Stephen, L. Bassani, M. Molina +7
The IBIS/ISGRI first year galactic plane survey has produced a catalogue containing 123 hard X-ray sources visible down to a flux limit of a few milliCrabs. The point source locati…
Discovery of the X-ray burster SAX J1752.3-3138
M. Cocchi, A. Bazzano, L. Natalucci +5
During a 50 ks monitoring observation of the Galactic bulge performed in September 1999 by the Wide Field Cameras on board the BeppoSAX satellite, an X-ray burst was detected from…
The 3rd IBIS/ISGRI soft gamma-ray survey catalog
A. J. Bird, A. Malizia, A. Bazzano +20
In this paper we report on the third soft gamma-ray source catalog obtained with the IBIS/ISGRI gamma-ray imager on board the INTEGRAL satellite. The scientific dataset is based on…
The nature of fifty Palermo Swift-BAT hard X-ray objects through optical spectroscopy
A. F. Rojas, N. Masetti, D. Minniti +16
We present the nature of 50 hard X-ray emitting objects unveiled through an optical spectroscopy campaign performed at seven telescopes in the northern and southern hemispheres. Th…
On the identification of the Fermi/LAT source 0FGL J2001.0+4352 with a BL Lac
L. Bassani, R. Landi, N. Masetti +3
We report on the identification of the gamma-ray source 0FGL J20001.0+4352 listed in the Fermi bright source catalogue. This object, which has an observed 1-100 GeV flux of (7.8 +/…
The INTEGRAL source IGR J16328-4726: a High Mass X-ray Binary from the Beppo SAX era
M. Fiocchi, A. Bazzano, A. J. Bird +5
We report on temporal and spectral analysis of the INTEGRAL fast transient candidate IGR J16328-4726 observed with Beppo SAX in 1998 and more recently with INTEGRAL. The MECS X-ray…
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…
A young and obscured AGN embedded in the giant radio galaxy Mrk 1498
L. Hernández-GarcÃa, F. Panessa, L. Bassani +10
Mrk 1498 is part of a sample of galaxies with extended emission line regions (extended outwards up to a distance of 7 kpc) suggested to be photo-ionized by an AGN that has fa…
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…
The AGN nature of 11 out of 12 Swift/RXTE unidentified sources through optical and X-ray spectroscopy
R. Landi, N. Masetti, L. Morelli +9
The Swift Burst Alert Telescope (BAT) is performing a high Galactic latitude survey in the 14-195 keV band at a flux limit of ~10^{-11} erg cm^{-2} s^{-1}, leading to the discovery…
X-ray bursts from 1RXS J170930.2-263927 = XTE J1709-267
M. Cocchi, A. Bazzano, L. Natalucci +5
We report evidence of type-I X-ray bursting activity from the transient 1RXS J170930.2-263927 when it was in outburst early 1997. This identifies the source as a probable low-mass…
Accurate classification of 75 counterparts of objects detected in the 54 month Palermo Swift/BAT hard X-ray catalogue
P. Parisi, N. Masetti, A. F. Rojas +10
Through an optical campaign performed at 4 telescopes located in the northern and the southern hemispheres, we have obtained optical spectroscopy for 75 counterparts of unclassifie…
The broad-band XMM-Newton and INTEGRAL spectra of bright type 1 Seyfert galaxies
F. Panessa, L. Bassani, A. De Rosa +7
The 0.5-150 keV broad-band spectra of a sample of nine bright type 1 Seyfert galaxies are analyzed here. These sources have been discovered/detected by INTEGRAL and subsequently ob…
Spectral states and transient behaviour of a sample of X-ray bursters observed by BeppoSax
L. Natalucci, A. Bazzano, F. Capitanio +3
During observation campaigns of the Galactic Bulge region, BeppoSAX detected a total of 21 new X-ray bursters in about 6 years of operation. These sources are mostly transient and…
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 discovery of a bright highly obscured galactic X-ray binary source IGR J16318-4848
R. Walter, J. Rodriguez, L. Foschini +8
INTEGRAL regularly scans the Galactic plane to search for new objects and in particular for absorbed sources with the bulk of their emission above 10-20 keV. The first new INTEGRAL…
An active state of the BL Lac Object Markarian 421 detected by INTEGRAL in April 2013
E. Pian, M. Tuerler, M. Fiocchi +22
Multiwavelength variability of blazars offers indirect insight into their powerful engines and on the mechanisms through which energy is propagated from the centre down the jet. Th…
IGR J16393-4643: a new heavily-obscured X-ray pulsar
A. Bodaghee, R. Walter, J. A. Zurita Heras +5
An analysis of the high-energy emission from IGR J16393-4643 (=AX J1639.0-4642) is presented using data from INTEGRAL and XMM-Newton. The source is persistent in the 20-40 keV band…
Broadband X-ray properties of absorbed AGN
A. De Rosa, F. Panessa, L. Bassani +6
In this paper we report on the broadband X-ray properties of a complete sample of 33 absorbed Seyfert galaxies hard X-ray selected with integral. The high quality broadband spectra…
The counterpart/s of IGR J20159+3713/SWIFT J2015.9+3715: dissecting a complex region with emission from keV to TeV
L. Bassani, R. Landi, A. Malizia +4
We report on the identification of a new soft gamma-ray source, namely IGR J20159+3713/SWIFT J2015.9+3715, first detected by INTEGRAL/IBIS and then confirmed by Swift/BAT. The sour…
The orbital period of the recurrent X-ray transient in Terzan 6
J. J. M. in 't Zand, A. Bazzano, M Cocchi +11
Four or five new outbursts were detected of the bright X-ray transient GRS 1747-312 in the globular cluster Terzan 6 between 1996 and 1999, through monitoring campaigns with the Wi…
Observation of GRB 030131 with the INTEGRAL satellite
D. Gotz, S. Mereghetti, K. Hurley +13
A long Gamma-Ray Burst (GRB) was detected with the instruments on board the INTEGRAL satellite on January 31 2003. Although most of the GRB, which lasted 150 seconds, occurre…
Multiwavelength monitoring of the nucleus in PBC J2333.9-2343: the giant radio galaxy with a blazar-like core
L. Hernández-GarcÃa, F. Panessa, G. Bruni +12
PBC J2333.9-2343 is a giant radio galaxy at z = 0.047 with a bright central core associated to a blazar nucleus. If the nuclear blazar jet is a new phase of the jet activity, then…
State transition and flaring activity of IGR J17464-3213/H1743-322 with SPI/INTEGRAL telescope
A. Joinet, E. Jourdain, J. Malzac +4
IGR J17464-3213, already known as the HEAO-1 transient source H1743-322, has been detected during a state transition by the SPI/INTEGRAL telescope. We describe the spectral evoluti…
Investigating the X-ray counterparts to unidentified sources in the 1000-orbit INTEGRAL/IBIS catalogue
R. Landi, L. Bassani, A. Bazzano +6
The latest INTEGRAL/IBIS all-sky survey lists 219 hard X-ray sources whose nature is still unknown. We report on our ongoing campaign aimed at identifying these high-energy emitter…
The 17 min orbital period in the Ultra Compact X-ray Binary 4U 0513-40
M. Fiocchi, A. Bazzano, L. Natalucci +2
The ultracompact low-mass X-ray binary 4U 0513-40 in the globular cluster NGC1851 exhibits large amplitude X-ray flux variations with spectral changes from low/hard to high/soft st…
Spectral states evolution of 4U 1728-34 observed by INTEGRAL and RXTE: non-thermal component detection
A. Tarana, T. Belloni, A. Bazzano +2
We report results of a one-year monitoring of the low mass X-ray binary (LMXB) source (atoll type) 4U 1728-34 with INTEGRAL and RXTE. Three time intervals were covered by INTEGRAL,…
INTEGRAL and XMM-Newton observations of the weak GRB 030227
S. Mereghetti, D. Gotz, A. Tiengo +16
We present INTEGRAL and XMM-Newton observations of the prompt gamma-ray emission and the X-ray afterglow of GRB030227, the first GRB for which the quick localization obtained with…
Evolution of MAXI J1631-479 during the January 2019 outburst observed by INTEGRAL/IBIS
M. Fiocchi, F. Onori, A. Bazzano +8
We report on a recent bright outburst from the new X-ray binary transient MAXI J1631-479, observed in January 2019. In particular, we present the 30-200 keV analysis of spectral tr…
Swift/XRT counterparts to unassociated Fermi high-energy LAT sources
R. Landi, L. Bassani, J. B. Stephen +3
We report the results from our analysis of a large set of archival data acquired with the X-ray telescope (XRT) onboard Swift, covering the sky region surrounding objects from the…
Optical spectroscopic classification of 35 hard X-ray sources from the Swift-BAT 70-month catalogue
E. J. Marchesini, N. Masetti, E. Palazzi +15
The nature of a substantial percentage (about one fifth) of hard X-ray sources discovered with the BAT instrument onboard the Neil Gehrels Swift Observatory (hereafter Swift) is un…
The XMM Newton and INTEGRAL observations of the supergiant fast X-ray transient IGR J16328-4726
M. Fiocchi, A. Bazzano, L. Natalucci +6
The accretion mechanism producing the short flares observed from the Supergiant Fast X-ray Transients (SFXT) is still highly debated and forms a major part in our attempts to place…