J. P. Roques
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View article: INTEGRAL view of GRB 221009A
INTEGRAL view of GRB 221009A Open
The gamma-ray burst GRB 221009A is among the most luminous of its kind and its proximity to Earth has made it an exceptionally rare observational event. The International Gamma-ray Astrophysics Laboratory (INTEGRAL) was in an optimal aspec…
View article: Centaurus A: Exploring the Nature of the Hard X-Ray/Soft Gamma-Ray Emission with INTEGRAL
Centaurus A: Exploring the Nature of the Hard X-Ray/Soft Gamma-Ray Emission with INTEGRAL Open
The question of the origin of the hard X-ray/soft gamma-ray emission in Centaurus A (Cen A) persists despite decades of observations. Results from X-ray instruments suggest a jet origin since the implied electron temperature ( kT e ) would…
View article: Centaurus A: Exploring the Nature of the Hard X-ray/Soft Gamma-ray Emission with INTEGRAL
Centaurus A: Exploring the Nature of the Hard X-ray/Soft Gamma-ray Emission with INTEGRAL Open
The question of the origin of the hard X-ray/soft gamma-ray emission in Centaurus A (Cen A) persists despite decades of observations. Results from X-ray instruments suggest a jet origin since the implied electron temperature (kT_e) would c…
View article: Investigating the Nature of the Hard X-ray/Soft Gamma-ray Emission from Centaurus A
Investigating the Nature of the Hard X-ray/Soft Gamma-ray Emission from Centaurus A Open
The question of the origin of the hard X-ray/soft gamma-ray emission in Centaurus A (Cen A) persists despite decades of observations. Low energy results from X-ray instruments suggest a jet origin. In contrast, high energy X-ray/soft gamma…
View article: Limits on X-Ray Polarization at the Core of Centaurus A as Observed with the Imaging X-Ray Polarimetry Explorer
Limits on X-Ray Polarization at the Core of Centaurus A as Observed with the Imaging X-Ray Polarimetry Explorer Open
We present measurements of the polarization of X-rays in the 2–8 keV band from the nucleus of the radio galaxy Centaurus A (Cen A), using a 100 ks observation from the Imaging X-ray Polarimetry Explorer (IXPE). Nearly simultaneous observat…
View article: MAXI J1535–571 2017 Outburst Seen by INTEGRAL/SPI and Investigating the Origin of Its Hard Tail
MAXI J1535–571 2017 Outburst Seen by INTEGRAL/SPI and Investigating the Origin of Its Hard Tail Open
On 2017 September 2 MAXI J1535–571 went into outburst and peaked at ∼5 Crab in the 2–20 keV energy range. Early in the flare, the INTErnational Gamma-Ray Astrophysics Laboratory (INTEGRAL) performed target of opportunity pointings and moni…
View article: Limits on X-ray Polarization at the Core of Centaurus A as Observed with the Imaging X-ray Polarimetry Explorer
Limits on X-ray Polarization at the Core of Centaurus A as Observed with the Imaging X-ray Polarimetry Explorer Open
We present measurements of the polarization of X-rays in the $2-8 \thinspace \mathrm{keV}$ band from the nucleus of the radio galaxy Centaurus A (Cen A), using a 100ks observation from the Imaging X-ray Polarimetry Explorer (IXPE). Nearly …
View article: INTEGRAL Results on Gamma-Ray Bursts and Polarization of Hard X-ray Sources
INTEGRAL Results on Gamma-Ray Bursts and Polarization of Hard X-ray Sources Open
In this paper we first review the results obtained by the INTEGRAL mission in the domain of Gamma-Ray Bursts (GRBs), thanks to the INTEGRAL Burst Alert System, which is able to deliver near real-time alerts for GRBs detected within the IBI…
View article: 2003–2019 Monitoring of the Crab Emission through INTEGRAL SPI, or Vice Versa
2003–2019 Monitoring of the Crab Emission through INTEGRAL SPI, or Vice Versa Open
The Crab Nebula is used by many instruments as a calibration source, in particular at high energy, where it is one of the brightest celestial objects. The spectrometer INTEGRAL SPI (20 keV–8 MeV), in operation since 2002 October, offers a …
View article: 2003–2018 Monitoring of the Crab Nebula Polarization in Hard X-Rays with INTEGRAL SPI
2003–2018 Monitoring of the Crab Nebula Polarization in Hard X-Rays with INTEGRAL SPI Open
We analyzed 16 yr of observations dedicated to the Crab (pulsar + nebula) with the SPectrometer on International Gamma-Ray Astrophysics Laboratory instrument to investigate its polarization properties. We find that the source presents a su…
View article: On the High-energy Emissions of Compact Objects Observed with INTEGRAL SPI: Event Selection Impact on Source Spectra and Scientific Results for the Bright Sources Crab Nebula, GS 2023+338 and MAXI J1820+070<sup>∗</sup>
On the High-energy Emissions of Compact Objects Observed with INTEGRAL SPI: Event Selection Impact on Source Spectra and Scientific Results for the Bright Sources Crab Nebula, GS 2023+338 and MAXI J1820+070<sup>∗</sup> Open
The Spectrometer on INTEGRAL (SPI) instrument has observed the hard X-ray sky from 20 keV up to a few MeV for more than 15 yr. In this energy domain, the main emitters are compact objects for which SPI provides spectral information of prim…
View article: INTEGRAL Observations of Gravitational-Wave Counterparts & Future Perspectives: Searching for GBM Un-Triggered SGRB with PICsIT
INTEGRAL Observations of Gravitational-Wave Counterparts & Future Perspectives: Searching for GBM Un-Triggered SGRB with PICsIT Open
International audience
View article: INTEGRAL results on the electromagnetic counterparts of gravitational waves
INTEGRAL results on the electromagnetic counterparts of gravitational waves Open
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 and study of the electromagnetic radiation associated to gr…
View article: Timing Analysis of V404 Cyg during Its Brightest Outburst with INTEGRAL/SPI
Timing Analysis of V404 Cyg during Its Brightest Outburst with INTEGRAL/SPI Open
The outburst of V404 Cyg during the summer of 2015 reached unparalleled intensities at X-ray and soft gamma-ray energies with fluxes Crab in the 20–50 keV energy band. To date, studies in the hard X-ray/soft gamma-ray energy domain have fo…
View article: INTEGRAL IBIS, SPI, and JEM-X observations of LVT151012
INTEGRAL IBIS, SPI, and JEM-X observations of LVT151012 Open
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 LVT151012, the INTErnational Gamma-Ray Astrophysics Laborato…
View article: INTEGRAL UPPER LIMITS ON GAMMA-RAY EMISSION ASSOCIATED WITH THE GRAVITATIONAL WAVE EVENT GW150914
INTEGRAL UPPER LIMITS ON GAMMA-RAY EMISSION ASSOCIATED WITH THE GRAVITATIONAL WAVE EVENT GW150914 Open
Using observations of the INTErnational Gamma-Ray Astrophysics Laboratory ( INTEGRAL ), we place upper limits on the gamma-ray and hard X-ray prompt emission associated with the gravitational wave event GW150914, which was discovered by th…
View article: INTEGRAL upper limits on gamma-ray emission associated with the gravitational wave event GW150914
INTEGRAL upper limits on gamma-ray emission associated with the gravitational wave event GW150914 Open
Using observations of the INTErnational Gamma-Ray Astrophysics Laboratory (INTEGRAL), we put upper limits on the gamma-ray and hard X-ray prompt emission associated with the gravitational wave event GW150914, discovered by the LIGO/Virgo c…
View article: High Energy Emission of V404 Cygni during 2015 outburst with INTEGRAL/SPI: Spectral analysis issues and solutions
High Energy Emission of V404 Cygni during 2015 outburst with INTEGRAL/SPI: Spectral analysis issues and solutions Open
A strong outburst of the X-ray transient V404 Cygni (= GS2023-338) was observed in 2015 June/July up to a level of 50 Crab in the hard X-ray domain. At this level of photon flux, an instrument's behavior may be severely tested and some ins…