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The SVOM satellite, to be launched in early 2024, is primarily devoted to the multi-wavelength observation of gamma-ray bursts and other higher-energy transients. Thanks to its onboard Microchannel X-ray Telescope and Visible-band…

Instrumentation and Methods for Astrophysics · Physics 2023-08-02 J. -G. Ducoin , B. Desoubrie , F. Daigne , N. Leroy

We provide an overview of the robotic Super-LOTIS (Livermore Optical Transient Imaging System) telescope and present results from gamma-ray burst (GRB) afterglow observations using Super-LOTIS and other Steward Observatory telescopes. The…

Astrophysics · Physics 2009-06-23 G. G. Williams , P. A. Milne , H. S. Park , S. D. Barthelmy , D. H. Hartmann , A. Updike , K. Hurley

Very few detections have been made of optical flashes contemporaneous with prompt high-energy emission from a gamma-ray burst (GRB). In this work, we present and analyze light curves of GRB-associated optical flashes and afterglows from the…

High Energy Astrophysical Phenomena · Physics 2024-06-28 Rahul Jayaraman , Michael Fausnaugh , George R. Ricker , Roland Vanderspek

We present ECLAIRs, the Gamma-ray burst (GRB) trigger camera to fly on-board the Chinese-French mission SVOM. ECLAIRs is a wide-field ($\sim 2$\,sr) coded mask camera with a mask transparency of 40\% and a 1024 $\mathrm{cm}^2$ detection…

Gamma-ray bursts (GRB) are powerful and highly variable sources of gamma rays that indicate the existence of cosmic particle accelerators. Under the assumption of hadronic acceleration in the jet, the expected neutrino energy spectrum is…

Astrophysics · Physics 2008-10-09 D. Dornic , G. Lelaizant

The GLAST Burst Monitor (GBM) will augment the capabilities of GLAST for the detection of cosmic gamma-ray bursts by extending the energy range (20 MeV to > 300 GeV) of the Large Area Telescope (LAT) towards lower energies by 2…

The observation of Gamma Ray Bursts (GRBs) with very-high-energy (VHE) gamma rays can provide understanding of the particle acceleration mechanisms in GRBs, and can also be used to probe the extra-galactic background light and place…

High Energy Astrophysical Phenomena · Physics 2015-06-16 Ignacio Taboada , Rudy C. Gilmore

For several decades now, wide-field coded mask cameras have been used with success to localise Gamma-ray bursts (GRBs). In these instruments, the event count rate is dominated by the photon background due to their large field of view and…

Instrumentation and Methods for Astrophysics · Physics 2015-05-13 O. Godet , P. Sizun , D. Barret , P. Mandrou , B. Cordier , S. Schanne , N. Remoue

Fast radio burst (FRBs) are an exciting class of bright, extragalactic, millisecond radio transients. The recent development of large field-of-view (FOV) radio telescopes has caused a rapid rise in the number of identified single burst and…

High Energy Astrophysical Phenomena · Physics 2021-08-24 Matthew Lundy

During its first cycle of observations, VERITAS observed several GRBs in response to broadcast alerts from the Gamma-ray bursts Coordinates Network (GCN). The GRBs were followed up and observed thereafter with typical delays of 2 to 4…

High Energy Astrophysical Phenomena · Physics 2019-08-13 Nicola Galante

We present the Micro-channel X-ray Telescope (MXT), a new narrow-field (about 1{\deg}) telescope that will be flying on the Sino-French SVOM mission dedicated to Gamma-Ray Burst science, scheduled for launch in 2021. MXT is based on square…

The Microchannel X-ray Telescope (MXT) will be the first focusing X-ray telescope based on a "Lobster-Eye" optical design to be flown on Sino-French mission SVOM. SVOM will be dedicated to the study of Gamma-Ray Bursts and more generally…

The Fermi Gamma-ray Burst Monitor (GBM) has detected over 1400 Gamma-Ray Bursts (GRBs) since it began science operations in July, 2008. We use a subset of over 300 GRBs localized by instruments such as Swift, the Fermi Large Area Telescope,…

In some models of quantum gravity, space-time is thought to have a foamy structure with non-trivial optical properties. We probe the possibility that photons propagating in vacuum may exhibit a non-trivial refractive index, by analyzing the…

Astrophysics · Physics 2008-11-26 J. Ellis , N. E. Mavromatos , D. V. Nanopoulos , A. S. Sakharov

Fermi satellite discovered that cosmological gamma-ray bursts (GRBs) are accompanied by long GeV flashes. In two GRBs, an optical counterpart of the GeV flash has been detected. Recent work suggests that the GeV+optical flash is emitted by…

High Energy Astrophysical Phenomena · Physics 2015-11-04 Romain Hascoët , Indrek Vurm , Andrei M. Beloborodov

The on-board Scientific Trigger Unit (UTS) is designed to detect Gamma Ray Bursts (GRBs) in real-time, using the data produced by the ECLAIRs camera, foreseen to equip the future French-Chinese satellite mission SVOM (Space-based Variable…

Instrumentation and Methods for Astrophysics · Physics 2014-12-01 Stéphane Schanne , Hervé Le Provost , Pierre Kestener , Aleksandra Gros , Marin Cortial , Diego Götz , Patrick Sizun , Frédéric Château , Bertrand Cordier

We have developed a lightweight tool, {\tt RapidGBM}, featuring a web-based interface and capabilities of rapid calculation of Fermi Gamma-ray Burst Monitor (GBM) visibilities and performance of basic data analysis. It has two key features:…

Due to their highly luminous nature, gamma-ray bursts (GRBs) are useful tools in studying the early Universe (up to z = 10). We consider whether the available subset of Swift high redshift GRBs are unusual when compared to analogous…

High Energy Astrophysical Phenomena · Physics 2013-08-27 O. M. Littlejohns , N. R. Tanvir , R. Willingale , P. T. O'Brien , P. A. Evans , A. J. Levan

We investigate the feasibility of implementing a system called 'Follow the BAT' that will coordinate ground-based robotic optical and near infrared (NIR) telescopes to monitor the Swift BAT field-of-view (FoV). The system will optimize the…

High Energy Astrophysical Phenomena · Physics 2015-05-30 T. N. Ukwatta , J. T. Linnemann , K. S. Dhuga , N. Gehrels

The Energetic X-ray Imaging Survey Telescope (EXIST) is a proposed next generation multi-wavelength survey mission. The primary instrument is a High Energy telescope (HET) that conducts the deepest survey for Gamma-ray Bursts (GRBs),…

Instrumentation and Methods for Astrophysics · Physics 2015-05-14 J. Hong , J. E. Grindlay , B. Allen , S. D. Barthelmy , G. K. Skinner , N. Gehrels , the EXIST HET Working Group