Publications (45)
Exceptional flaring activity of the anomalous X-ray pulsar 1E 1547.0-5408
V. Savchenko, A. Neronov, V. Beckmann +2
(Abridged) We studied an exceptional period of activity of the anomalous X-ray pulsar 1E 1547.0-5408 in January 2009, during which about 200 bursts were detected by INTEGRAL. The m…
Instrument Performance and Simulation Verification of the POLAR Detector
M. Kole, Z. H. Li, N. Produit +32
POLAR is a new satellite-born detector aiming to measure the polarization of an unprecedented number of Gamma-Ray Bursts in the 50-500 keV energy range. The instrument, launched on…
Is Radiation of Quantized Black Holes Observable?
I. B. Khriplovich, N. Produit
If primordial black holes (PBH) saturate the present upper limit on the dark matter density in our Solar system and if their radiation spectrum is discrete, the sensitivity of mode…
POLAR, a compact detector for Gamma Ray Bursts photon polarization measurements
N. Produit, F. Barao, S. Deluit +7
The design and the simulated performances of a compact detector dedicated to the measurement of GRB photon polarization is presented. Such a detector would permit to answer the que…
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…
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…
Analysis of the new INTEGRAL Earth observations to measure the cosmic X-ray background
M. Türler, N. Produit, L. Pavan +2
A new series of Earth occultation observations has been started in 2012 to refine the determination of the cosmic X-ray background by the INTEGRAL mission. We show here that the ne…
The INTEGRAL Science Data Centre (ISDC)
T. J. -L. Courvoisier, R. Walter, V. Beckmann +17
The INTEGRAL Science Data Centre (ISDC) provides the INTEGRAL data and means to analyse them to the scientific community. The ISDC runs a gamma ray burst alert system that provides…
Development and science perspectives of the POLAR-2 instrument: a large scale GRB polarimeter
N. De Angelis, J. M. Burgess, F. Cadoux +14
Despite several decades of multi-wavelength and multi-messenger spectral observations, Gamma-Ray Bursts (GRBs) remain one of the big mysteries of modern astrophysics. Polarization…
Observation of V0332+53 over the 2004/2005 outburst with Integral
I. Kreykenbohm, N. Mowlavi, K. Pottschmidt +8
We present the spectral and temporal analysis of the 2004/2005 outburst of the transient X-ray pulsar V0332+53 as observed with Integral. After the discovery of the third cyclotron…
Science with e-ASTROGAM (A space mission for MeV-GeV gamma-ray astrophysics)
A. De Angelis, V. Tatischeff, I. A. Grenier +248
e-ASTROGAM (enhanced ASTROGAM) is a breakthrough Observatory space mission, with a detector composed by a Silicon tracker, a calorimeter, and an anticoincidence system, dedicated t…
Sensitivity of the Cherenkov Telescope Array for probing cosmology and fundamental physics with gamma-ray propagation
The Cherenkov Telescope Array Consortium, :, H. Abdalla +496
The Cherenkov Telescope Array (CTA), the new-generation ground-based observatory for -ray astronomy, provides unique capabilities to address significant open questions in astro…
South-West extension of the hard X-ray emission from the Coma cluster
D. Eckert, A. Neronov, T. J. -L. Courvoisier +1
We explore the morphology of hard (18-30 keV) X-ray emission from the Coma cluster of galaxies. We analyze a deep (1.1 Ms) observation of the Coma cluster with the ISGRI imager on…
Performance of MAGIC stellar intensity interferometer and expansion to MAGIC + CTAO-LST1 stellar intensity interferometer
Alejo Cifuentes, V. A. Acciari, F. Barnes +24
A new generation of optical intensity interferometers are emerging in recent years taking advantage of the existing infrastructure of Imaging Atmospheric Cherenkov Telescopes (IACT…
First measurements and upgrade plans of the MAGIC intensity interferometer
Juan Cortina, V. A. Acciari, A. Biland +22
The two MAGIC 17-m diameter Imaging Atmospheric Cherenkov Telescopes have been equipped to work also as an intensity interferometer with a deadtime-free, 4-channel, GPU-based, real…
INTEGRAL and RXTE observations of broad-line radio galaxy 3C 111
M. Chernyakova, P. Favre, T. J. -L. Courvoisier +8
3C 111 is an X-ray bright broad-line radio galaxy which is classified as a Fanaroff-Riley type II source with a double-lobe/single jet morphology, and reported superluminal motion.…
Monte Carlo studies for the optimisation of the Cherenkov Telescope Array layout
A. Acharyya, I. Agudo, E. O. Angüner +467
The Cherenkov Telescope Array (CTA) is the major next-generation observatory for ground-based very-high-energy gamma-ray astronomy. It will improve the sensitivity of current groun…
The INTEGRAL/IBIS Scientific Data Analysis
A. Goldwurm, P. David, L. Foschini +6
The gamma-ray astronomical observatory INTEGRAL, succesfully launched on 17th October 2002, carries two large gamma-ray telescopes. One of them is the coded-mask imaging gamma-ray…
INTEGRAL hard X-ray spectra of the cosmic X-ray background and Galactic ridge emission
M. Turler, M. Chernyakova, T. J. -L. Courvoisier +4
We derive the spectra of the cosmic X-ray background (CXB) and of the Galactic ridge X-ray emission (GRXE) in the ~20-200 keV range from the data of the IBIS instrument aboard the…
INTEGRAL observations of V0332+53 in outburst
I. Kreykenbohm, N. Mowlavi, N. Produit +9
We present the analysis of a 100ksec Integral(3-100kev) observation of the transient X-ray pulsar V0332+53 inoutburst. The source is pulsating at P=4.3751+/-0.0002s with a clear do…
A method to localize gamma-ray bursts using POLAR
E. Suarez-Garcia, D. Haas, W. Hajdas +10
The hard X-ray polarimeter POLAR aims to measure the linear polarization of the 50-500 keV photons arriving from the prompt emission of gamma-ray bursts (GRBs). The position in the…
INTEGRAL observation of the high-mass X-ray transient V0332+53 during the 2005 outburst decline
N. Mowlavi, I. Kreykenbohm, S. E. Shaw +7
The decline of the high mass X-ray transient V0332+53 during the Dec. 2004 to Feb. 2005 outburst is analysed from the data recorded by INTEGRAL. The flux is shown to decrease expon…
Stellar physics at sub-nanoradian angular resolution
P. Batista, J. Biteau, C. Carlile +36
Many stars -- if they could be imaged with enough angular resolution -- would exhibit features expected from theory but not possible to extract from spectra. We may group these by…
INTEGRAL probes the morphology of the Crab nebula in hard X-rays/soft gamma-rays
D. Eckert, V. Savchenko, N. Produit +1
Aims. We use the IBIS/ISGRI telescope on-board INTEGRAL to measure the position of the centroid of the 20-200 keV emission from the Crab region. Methods. We find that the astrometr…
Time-Resolved GRB Polarization with POLAR and GBM
J. Michael Burgess, M. Kole, F. Berlato +5
Simultaneous -ray measurements of gamma-ray burst (GRB) spectra and polarization offer a unique way to determine the underlying emission mechanism(s) in these objects as well a…
The catalog of variable sources detected by INTEGRAL I: Catalog and Techniques
I. Telezhinsky, D. Eckert, V. Savchenko +3
Context: In 6 years of operation, INTEGRAL/ISGRI revealed more than 500 sources. Many of these sources are variable. Taking into account that nearly half of INTEGRAL/ISGRI sources…
Design and construction of the POLAR detector
N. Produit, T. W. Bao, T. Batsch +35
The POLAR detector is a space based Gamma Ray Burst (GRB) polarimeter with a wide field of view, which covers almost half the sky. The instrument uses Compton scattering of gamma r…
INTEGRAL observations of the cosmic X-ray background in the 5-100 keV range via occultation by the Earth
E. Churazov, R. Sunyaev, M. Revnivtsev +32
We study the spectrum of the cosmic X-ray background (CXB) in energy range 5-100 keV. Early in 2006 the INTEGRAL observatory performed a series of four 30ksec observations wi…
A detailed analysis of X-ray emission line velocities of Capella from over 20 years of Chandra/HETG spectroscopy
E. Bozzo, D. P. Huenemoerder, N. Produit +3
Capella is the brightest chromospherically active binary in the sky, hosting a cooler G8III giant (Aa) and an hotter G1III companion (Ab). The source has been extensively observed…
Calibration of the Space-borne Compton Polarimeter POLAR flight model with 100% polarized X-ray beams
H. L. Xiao, W. Hajdas, P. Socha +32
POLAR is space-borne detector designed for a precise measurement of gamma-ray polarization of the prompt emissions of Gamma-Ray Bursts in the energy range 50 keV - 500 keV. POLAR i…
Calibration of Gamma-ray Burst Polarimeter POLAR
H. L. Xiao, W. Hajdas, T. W. Bao +33
Gamma Ray Bursts (GRBs) are the strongest explosions in the universe which might be associated with creation of black holes. Magnetic field structure and burst dynamics may influen…
Can one detect passage of small black hole through the Earth?
I. B. Khriplovich, A. A. Pomeransky, N. Produit +1
The energy losses of a small black hole passing through the Earth are examined. In particular, we investigate the excitations in the frequency range accessible to modern acoustic d…
POLAR: Final Calibration and In-Flight Performance of a Dedicated GRB Polarimeter
M. Kole, T. W. Bao, T. Batsch +41
Gamma-ray polarimetry is a new powerful tool to study the processes responsible for the emission from astrophysical sources and the environments in which this emission takes place.…
INTEGRAL discovery of non-thermal hard X-ray emission from the Ophiuchus cluster
D. Eckert, N. Produit, S. Paltani +2
We present the results of deep observations of the Ophiuchus cluster of galaxies with INTEGRAL in the 3-80 keV band. We analyse 3 Ms of INTEGRAL data on the Ophiuchus cluster with…
A description of sources detected by INTEGRAL during the first 4 years of observations
A. Bodaghee, T. J. -L. Courvoisier, J. Rodriguez +6
Parameters from the literature, such as positions, photoelectric absorption (nH), spin and orbital periods, and distances or redshifts, were collected for all ~500 sources detected…
Dark Matter Line Searches with the Cherenkov Telescope Array
S. Abe, J. Abhir, A. Abhishek +562
Monochromatic gamma-ray signals constitute a potential smoking gun signature for annihilating or decaying dark matter particles that could relatively easily be distinguished from a…
Simultaneous observations of the quasar 3C 273 with INTEGRAL, XMM-Newton and RXTE
T. J. -L. Courvoisier, V. Beckmann, G. Bourban +15
INTEGRAL has observed the bright quasar 3C 273 on 3 epochs in January 2003 as one of the first observations of the open programme. The observation on January 5 was simultaneous wit…
The Hard X-ray 20-40 keV AGN Luminosity Function
V. Beckmann, S. Soldi, C. R. Shrader +2
We have compiled a complete extragalactic sample based on 25,000 deg^2 to a limiting flux of 3E-11 ergs/cm**2/sec (7,000 deg^2 to a flux limit of 1E-11 ergs/cm**2/sec) in the 20 -…
Scientific Performance of the ISDC Quick Look Analysis
S. E. Shaw, N. Mowlavi, K. Ebisawa +22
The INTEGRAL Science Data Centre (ISDC) routinely monitors the Near Real Time data (NRT) from the INTEGRAL satellite. A first scientific analysis is made in order to check for the…
POLAR-2: a large scale gamma-ray polarimeter for GRBs
J. Hulsman, N. de Angelis, J. M. Burgess +14
The prompt emission of GRBs has been investigated for more than 50 years but remains poorly understood. Commonly, spectral and temporal profiles of γ-ray emission are analysed. Ho…
Gamma-Ray Polarization Results of the POLAR Mission and Future Prospects
M. Kole, N. de Angelis, J. M. Burgess +14
Despite over 50 years of Gamma-Ray Burst (GRB) observations many open questions remain about their nature and the environments in which the emission takes place. Polarization measu…
Passage of small black hole through the Earth. Is it detectable?
I. B. Khriplovich, A. A. Pomeransky, N. Produit +1
We examine the energy losses of a small black hole passing through the Earth, and in particular, the excitations created in the frequency range accessible to modern acoustic detect…
A particle acceleration site in the Coma cluster?
D. Eckert, N. Produit, A. Neronov +1
We present the results of a deep (1.1 Ms) observation of the Coma cluster of galaxies in the 18-30 keV band with the IBIS/ISGRI imager on board the INTEGRAL satellite. We show that…
Prospects for -ray observations of the Perseus galaxy cluster with the Cherenkov Telescope Array
The Cherenkov Telescope Array Consortium, :, K. Abe +564
Galaxy clusters are expected to be dark matter (DM) reservoirs and storage rooms for the cosmic-ray protons (CRp) that accumulate along the cluster's formation history. Accordingly…