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Two classes of gamma-ray bursts have been identified in the BATSE catalogs characterized by durations shorter and longer than about 2 seconds. There are, however, some indications for the existence of a third class. Swift satellite…

Astrophysics · Physics 2008-10-01 I. Horvath , L. G. Balazs , Z. Bagoly , P. Veres

Multi-wavelength and multi-messenger astrophysics have experienced rapid growth over the past decade, seeking a complete picture of different cosmic phenomena. Transient sources, in particular, benefit from the input of multi-messenger…

High Energy Astrophysical Phenomena · Physics 2025-10-06 Bernardo Cornejo , Halim Ashkar , Matteo Cerruti , Ilja Jaroschewski , Pierre Pichard , Santiago Pita , Fabian Schussler

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

We have analysed all the X-ray images centred on Gamma Ray Bursts generated by Swift over the last 15 years using automatic tools that do not require any expertise in X-ray astronomy, producing results in excellent agreement with previous…

The Cherenkov Telescope Array (CTA) will be the next-generation observatory in the field of very-high-energy (20 GeV to 300 TeV) gamma-ray astroparticle physics. The traditional approach to data analysis in this field is to apply quality…

Instrumentation and Methods for Astrophysics · Physics 2023-09-21 Juan Bernete , Orel Gueta , Tarek Hassan , Max Linhoff , Gernot Maier , Atreyee Sinha

Using the gamma-ray bursts simultaneously detected by Swift/BAT and Fermi/GBM we performed a joint spectral and temporal analysis of the prompt emission data and confirm the rough correlation between the BAT-band photon index Gamma_BAT and…

High Energy Astrophysical Phenomena · Physics 2015-06-03 Francisco Virgili , Ying Qin , Bing Zhang , Enwei Liang

We analyzed data obtained by the SPI telescope onboard the INTEGRAL observatory to search for short transient events with a duration from 1 ms to a few tens of seconds. An algorithm for identifying gamma-ray events against the background of…

High Energy Astrophysical Phenomena · Physics 2015-06-19 P. Yu. Minaev , A. S. Pozanenko , S. V. Molkov , S. A. Grebenev

Bayesian Blocks is a new time series algorithm for detecting localized structures (spikes or shots), revealing pulse shapes, and generally characterizing intensity variations. It maps raw counting data into a maximum likelihood piecewise…

Astrophysics · Physics 2009-10-30 Jeffrey D. Scargle , Jay Norris , Jerry Bonnell

Swift is a satellite equipped with gamma-ray, X-ray, and optical-UV instruments aimed at discovering, localizing and collecting data from gamma-ray bursts (GRBs). Launched at the end of 2004, this small-size mission finds about a hundred…

Instrumentation and Methods for Astrophysics · Physics 2015-06-12 S. Savaglio , U. Grothkopf

The time profiles of many gamma-ray bursts consist of distinct pulses, which offers the possibility of characterizing the temporal structure of these bursts using a relatively small set of pulse shape parameters. This pulse decomposition…

Astrophysics · Physics 2009-10-31 Andrew Lee , Elliott D. Bloom , Vahe Petrosian

In the current view of Gamma-Ray Burst (GRB) phenomena, an emission component extending up to the very-high energy (VHE, E > 30 GeV) domain is though to be a relatively common feature at least in the brightest events. This leads to an…

Instrumentation and Methods for Astrophysics · Physics 2013-07-15 Saverio Lombardi , Alessandro Carosi , Lucio Angelo Antonelli

Since its early phases of operation, the AGILE mission is successfully observing Gamma Ray Bursts (GRBs) in the hard X-ray band with the SuperAGILE imager and in the MeV range with the Mini-Calorimeter. Up to now, three firm GRB detections…

Gamma-Ray Transient Monitor (GTM) is an all-sky monitor onboard the Distant Retrograde Orbit-A (DRO-A) satellite, with the scientific objective of detecting gamma-ray bursts in the energy range of 20 keV to 1 MeV. GTM is equipped with five…

Since its launch in 2008, the Fermi Large Area Telescope (LAT) allowed us to peek into the extremely energetic side of the Universe with unprecedented sensitivity and resolution. The tools available for analyzing Fermi-LAT data are the…

High Energy Astrophysical Phenomena · Physics 2022-06-24 Raniere de Menezes

Blazars are extremely variable objects emitting radiation across the electromagnetic spectrum and showing variability on time scales from minutes to years. For the understanding of the emission mechanisms, simultaneous multi-wavelength…

Instrumentation and Methods for Astrophysics · Physics 2017-08-09 Daniela Dorner , Thomas Bretz , Magdalena Gonzalez , Ruben Alfaro , Gagik Tovmassian

In the era of time-domain, multi-messenger astronomy, the detection of transient events on the high-energy electromagnetic sky has become more important than ever. The Gravitational wave high-energy Electromagnetic Counterpart All-sky…

Time-to-Collision (TTC) estimation lies in the core of the forward collision warning (FCW) functionality, which is key to all Automatic Emergency Braking (AEB) systems. Although the success of solutions using frame-based cameras (e.g.,…

Robotics · Computer Science 2025-04-24 Kaizhen Sun , Jinghang Li , Kuan Dai , Bangyan Liao , Wei Xiong , Yi Zhou

The Fermi Gamma-ray Space Telescope with its main instrument onboard, the Large Area Telescope (LAT), opened a new era in high-energy astrophysics and in particular for the study of Gamma-Ray Bursts (GRBs), which are short flashes of -rays…

High Energy Astrophysical Phenomena · Physics 2010-12-03 Aurelien Bouvier

We test the gamma-ray burst correlation between temporal variability and peak luminosity of the $\gamma$-ray profile on a homogeneous sample of 36 Swift/BAT GRBs with firm redshift determination. This is the first time that this correlation…