Research in high-energy astroparticle physics, multi-messenger astronomy, gamma rays, neutrinos and cosmic rays.https://www.multimessenger-astronomy.comhttps://www.multimessenger-astronomy.com/news/chasing-gravitational-waves-and-gamma-ray-bursts-with-the-cherenkov-telescope-array-observatoryhttps://www.multimessenger-astronomy.com/news/chasing-gravitational-waves-and-gamma-ray-bursts-with-the-cherenkov-telescope-array-observatorySimulations using tilepy show how CTAO can efficiently follow gravitational-wave alerts and detect very-high-energy emission from associated gamma-ray bursts.Fri, 24 Apr 2026 00:00:00 GMTGamma-ray burstsMulti-messenger searcheshttps://www.multimessenger-astronomy.com/news/hess-15-year-gamma-ray-burst-cataloghttps://www.multimessenger-astronomy.com/news/hess-15-year-gamma-ray-burst-catalogThe first H.E.S.S. gamma-ray burst catalog brings together 15 years of follow-up observations, analysis methods and constraints on very-high-energy emission.Fri, 24 Apr 2026 00:00:00 GMTGamma-ray burstshttps://www.multimessenger-astronomy.com/news/a-global-hunt-for-the-sources-of-cosmic-neutrinoshttps://www.multimessenger-astronomy.com/news/a-global-hunt-for-the-sources-of-cosmic-neutrinosA worldwide campaign combined IceCube alerts with gamma-ray observations to search for the accelerators that produce high-energy cosmic neutrinos.Mon, 02 Feb 2026 00:00:00 GMTNeutrino astronomyMulti-messenger searcheshttps://www.multimessenger-astronomy.com/news/the-end-of-an-erahttps://www.multimessenger-astronomy.com/news/the-end-of-an-eraGaia ended its sky-scanning observations in January 2025 after more than a decade, leaving a transformative archive that will shape astronomy for years.Tue, 21 Jan 2025 00:00:00 GMThttps://www.multimessenger-astronomy.com/news/the-astrophysics-centre-for-multimessenger-studies-in-europe-acmehttps://www.multimessenger-astronomy.com/news/the-astrophysics-centre-for-multimessenger-studies-in-europe-acmeThe EU-funded ACME project connects European astronomy and astroparticle research infrastructures to strengthen access, tools and collaboration in multi-messenger science.Sat, 05 Oct 2024 00:00:00 GMTMulti-messenger searcheshttps://www.multimessenger-astronomy.com/news/the-tilepy-platform-multi-messenger-astrophysics-at-your-fingertipshttps://www.multimessenger-astronomy.com/news/the-tilepy-platform-multi-messenger-astrophysics-at-your-fingertipsTilepy creates optimized observation schedules for gravitational waves, gamma-ray bursts and neutrino alerts, making coordinated follow-up faster and easier.Sat, 24 Aug 2024 00:00:00 GMTMulti-messenger searcheshttps://www.multimessenger-astronomy.com/news/astro-colibri-discussion-forumhttps://www.multimessenger-astronomy.com/news/astro-colibri-discussion-forumThe Astro-COLIBRI forum brings professional and amateur astronomers together to discuss transient events, request features and connect with the project team.Mon, 29 Jan 2024 00:00:00 GMTAstro-COLIBRIAmateur astronomyhttps://www.multimessenger-astronomy.com/news/grb-221009a-the-brightest-gamma-ray-burst-of-all-timeshttps://www.multimessenger-astronomy.com/news/grb-221009a-the-brightest-gamma-ray-burst-of-all-timesGRB 221009A was an exceptionally bright and nearby gamma-ray burst. H.E.S.S. observations helped probe its afterglow and very-high-energy emission.Wed, 29 Mar 2023 00:00:00 GMTGamma-ray burstshttps://www.multimessenger-astronomy.com/news/the-first-galactic-tev-transient-the-nova-explosion-rs-ophiuchi-observed-by-hesshttps://www.multimessenger-astronomy.com/news/the-first-galactic-tev-transient-the-nova-explosion-rs-ophiuchi-observed-by-hessH.E.S.S. observations of the 2021 RS Ophiuchi eruption established novae as Galactic transients capable of accelerating particles to TeV energies.Sat, 24 Sep 2022 00:00:00 GMTGamma-ray astronomyhttps://www.multimessenger-astronomy.com/news/hunting-for-the-gamma-ray-counterparts-to-binary-black-hole-mergershttps://www.multimessenger-astronomy.com/news/hunting-for-the-gamma-ray-counterparts-to-binary-black-hole-mergersH.E.S.S. searches wide gravitational-wave localization regions for gamma-ray counterparts, testing whether binary black-hole mergers can produce light.Wed, 05 Jan 2022 00:00:00 GMTMulti-messenger searcheshttps://www.multimessenger-astronomy.com/news/grb-190829ahttps://www.multimessenger-astronomy.com/news/grb-190829aH.E.S.S. followed nearby GRB 190829A for three nights, revealing unexpectedly bright and persistent very-high-energy emission from its afterglow.Fri, 04 Jun 2021 00:00:00 GMTGamma-ray burstshttps://www.multimessenger-astronomy.com/news/sgr-j19352154-an-active-magnetar-now-linked-to-repeating-fast-radio-bursts-a-new-opportunity-for-hesshttps://www.multimessenger-astronomy.com/news/sgr-j19352154-an-active-magnetar-now-linked-to-repeating-fast-radio-bursts-a-new-opportunity-for-hessA radio burst from the Galactic magnetar SGR J1935+2154 strengthened the connection between magnetars and fast radio bursts and triggered H.E.S.S. observations.Mon, 01 Jun 2020 00:00:00 GMTRadio transientshttps://www.multimessenger-astronomy.com/news/detection-of-very-high-energy-gamma-rays-from-grbshttps://www.multimessenger-astronomy.com/news/detection-of-very-high-energy-gamma-rays-from-grbsH.E.S.S. and MAGIC achieved the first detections of very-high-energy gamma rays from gamma-ray bursts, opening a new window on their afterglows.Wed, 20 Nov 2019 00:00:00 GMTGamma-ray burstshttps://www.multimessenger-astronomy.com/news/towards-a-new-high-energy-gamma-ray-observatoryhttps://www.multimessenger-astronomy.com/news/towards-a-new-high-energy-gamma-ray-observatoryThe SGSO Alliance developed the science case for a next-generation, wide-field gamma-ray observatory covering the Southern sky.Sun, 24 Feb 2019 00:00:00 GMTSGSO + AMIGOGamma-ray astronomyhttps://www.multimessenger-astronomy.com/news/neutrino-multi-messenger-astrophysics-another-revolutionhttps://www.multimessenger-astronomy.com/news/neutrino-multi-messenger-astrophysics-another-revolutionA high-energy IceCube neutrino and observations across the electromagnetic spectrum linked a cosmic neutrino to the flaring blazar TXS 0506+056.Wed, 11 Jul 2018 00:00:00 GMTNeutrino astronomyMulti-messenger searcheshttps://www.multimessenger-astronomy.com/news/the-birth-of-multi-messenger-astrophysicshttps://www.multimessenger-astronomy.com/news/the-birth-of-multi-messenger-astrophysicsGW170817 united gravitational waves with gamma-ray and multi-wavelength observations, establishing a new era of multi-messenger astronomy.Mon, 16 Oct 2017 00:00:00 GMTMulti-messenger searchesGamma-ray burstshttps://www.multimessenger-astronomy.com/news/gravitational-wave-astronomyhttps://www.multimessenger-astronomy.com/news/gravitational-wave-astronomyThe first gravitational-wave event observed by all three Advanced LIGO and Virgo detectors sharply improved localization of a merging black-hole system.Thu, 28 Sep 2017 00:00:00 GMTMulti-messenger searcheshttps://www.multimessenger-astronomy.com/news/ultra-high-energy-cosmic-rays-are-extragalactichttps://www.multimessenger-astronomy.com/news/ultra-high-energy-cosmic-rays-are-extragalacticA large-scale anisotropy measured by the Pierre Auger Observatory provides strong evidence that the highest-energy cosmic rays originate beyond our Galaxy.Fri, 22 Sep 2017 00:00:00 GMTCosmic rayshttps://www.multimessenger-astronomy.com/news/40-years-old-and-still-rockinghttps://www.multimessenger-astronomy.com/news/40-years-old-and-still-rockingForty years after launch, the Voyager spacecraft continued to transform our view of the Solar System, the heliosphere and interstellar cosmic rays.Wed, 06 Sep 2017 00:00:00 GMThttps://www.multimessenger-astronomy.com/news/a-network-of-three-gravitational-wave-detectorshttps://www.multimessenger-astronomy.com/news/a-network-of-three-gravitational-wave-detectorsVirgo joined the two Advanced LIGO detectors in 2017, creating a three-observatory network able to locate gravitational-wave sources far more precisely.Thu, 03 Aug 2017 00:00:00 GMTMulti-messenger searcheshttps://www.multimessenger-astronomy.com/news/35th-international-cosmic-ray-conferencehttps://www.multimessenger-astronomy.com/news/35th-international-cosmic-ray-conferenceHighlights from the 35th International Cosmic Ray Conference in Busan, including new results on transient gamma rays, cosmic rays, electrons and neutrinos.Thu, 20 Jul 2017 00:00:00 GMTGamma-ray astronomyCosmic rayshttps://www.multimessenger-astronomy.com/news/another-gravitational-wave-detectedhttps://www.multimessenger-astronomy.com/news/another-gravitational-wave-detectedThe third confirmed gravitational-wave signal revealed another distant black-hole merger and prompted a broad search for electromagnetic and neutrino counterparts.Thu, 01 Jun 2017 00:00:00 GMTMulti-messenger searcheshttps://www.multimessenger-astronomy.com/news/fast-radio-burst-seen-by-askaphttps://www.multimessenger-astronomy.com/news/fast-radio-burst-seen-by-askapASKAP detected three fast radio bursts shortly after beginning operations, demonstrating its potential to rapidly expand the sample of these mysterious events.Wed, 24 May 2017 00:00:00 GMTRadio transientshttps://www.multimessenger-astronomy.com/news/xmm-newton-slew-cataloghttps://www.multimessenger-astronomy.com/news/xmm-newton-slew-catalogThe second XMM-Newton Slew Survey turns data collected while the satellite moves between targets into a catalog of roughly 70,000 X-ray sources.Tue, 23 May 2017 00:00:00 GMThttps://www.multimessenger-astronomy.com/news/new-view-of-the-crab-nebulahttps://www.multimessenger-astronomy.com/news/new-view-of-the-crab-nebulaA multi-wavelength portrait of the Crab Nebula combines observations across nearly the full electromagnetic spectrum to reveal its complex structure.Thu, 11 May 2017 00:00:00 GMTGamma-ray astronomy