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Particle Physics Division


Institute of Research into the Fundamental Laws of the Universe
« The Particle Physics Division 
Announcing the Tilepy Platform: Multi-Messenger Astrophysics at your fingertips
Jul 19, 2024
Announcing the Tilepy Platform: Multi-Messenger Astrophysics at your fingertips
Tilepy is a cutting-edge platform designed to optimize and facilitate the scheduling of follow-up observations of multi-messenger events[1].
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May 11, 2023
Could the GRB221009A burst of October 9, 2022 be the most violent starburst of our millennium?
On October 9, 2022, at 13:16 and 59.99 seconds, a gamma-ray burst (GRB) dazzled almost all the X-ray and gamma ray detectors available at the time. Since their discovery, multi-wavelength telescopes in space and on the ground have continuously monitored these events.
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Could the GRB221009A burst of October 9, 2022 be the most violent starburst of our millennium?
Astro-COLIBRI: a novel platform for real-time multi-messenger astrophysics
Sep 21, 2021
Astro-COLIBRI: a novel platform for real-time multi-messenger astrophysics
After three years of reflection and development, the "Astro-Colibri" application has just been launched. This digital interface, created by researchers at Irfu/DPhP, aims to make information on transient and multi-messenger phenomena easily accessible in real time.
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Jul 23, 2021
Dark matter sub-halos among unidentified Fermi-LAT Objects-looking for UFOs?
Space-based experiments such as the Fermi satellite's Large Area (LAT), which detects gamma rays above 100 MeV, reveal a population of sources with no astrophysical counterpart at other wavelengths.
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Dark matter sub-halos among unidentified Fermi-LAT Objects-looking for UFOs?
Front-row view reveals exceptional cosmic explosion
Jun 04, 2021
Front-row view reveals exceptional cosmic explosion
On 29 August 2019, scientists from the H.E.S.S. collaboration recorded one of the brightest cosmic explosions ever observed in the Universe. This gamma-ray burst emitted the most energetic photons ever detected in this type of event.
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May 17, 2021
Desi starts its large spectroscopic survey for 5 years
After a particularly successful first campaign of tests and measurements, the Dark Energy Spectroscopic Instrument (DESI) has just successfully started its 5-year observing program.
After a particularly successful first campaign of tests and measurements, the Dark Energy Spectroscopic Instrument (DESI) has just successfully started its 5-year observing program.
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Desi starts its large spectroscopic survey for 5 years
The dark matter tracked down in the basement of the Irfu
Nov 21, 2019
The dark matter tracked down in the basement of the Irfu
The missing mass of the universe or non-baryonic dark matter is probably made up of particles that remain to be discovered. Massive and neutral, with very weak interactions, they still escape a detection that would identify them.
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Nov 20, 2019
First detection of gamma-ray burst afterglow in very-high-energy gamma light
After a decade-long search, scientists have for the first time detected a gamma-ray burst in very-high-energy gamma light. This discovery was made in July 2018 by the H.E.S.S. collaboration using the  huge 28-m telescope of the H.E.S.S. array in Namibia.
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First detection of gamma-ray burst afterglow in very-high-energy gamma light
The first multi-messenger hint for a cosmic ray accelerator?
Jul 13, 2018
The first multi-messenger hint for a cosmic ray accelerator?
A hundred years old mystery might get resolved with the detection of neutrinos by the IceCube collaboration coming from a known active black hole. Irfu, which coordinate those observations with the H.E.S.S.
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Apr 09, 2018
The largest catalog ever published of very high energy gamma ray sources in the Galaxy
The HESS international collaboration, to which CNRS and CEA contribute, has published the results of fifteen years of gamma ray observations of the Milky Way.
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The largest catalog ever published of very high energy gamma ray sources in the Galaxy
The fusion of two hyperdense stars makes the Universe resonate
Oct 16, 2017
The fusion of two hyperdense stars makes the Universe resonate
The discovery of a new type of gravitational wave
Using a range of detectors developed with the participation of the CEA, physicists at CEA-Irfu have scrutinized the region from which the gravitational wave was detected on August 17, 2017 by LIGO-VIRGO facilities.
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Oct 06, 2017
Science with the CTA observatory
The Cherenkov Telescope Array (CTA) consortium brings together 1300 scientists from 32 countries. They have published their scientific aims in a document over 200 pages long.
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Science with the CTA observatory
Brand New Electronics for the H.E.S.S. Gamma-ray Telescope
Mar 01, 2017
Brand New Electronics for the H.E.S.S. Gamma-ray Telescope
The electronics developed by IRFU now equips the four oldest gamma-ray telescopes of H.E.S.S. (High Energy Stereoscopic System) in Namibia. Making it possible to optimize the simultaneous operation of all five H.E.S.S.
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