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GECAM is a constellation of all-sky monitors in hard X-ray and gamma-ray band primarily aimed at high energy transients such as gamma-ray bursts, soft gamma-ray repeaters, solar flares and terrestrial gamma-ray flashes. As GECAM has the…

Ground-based 21-cm experiments targeting the global signal from the periods of Cosmic Dawn (CD) and Epoch of Reionization (EoR) are susceptible to adverse effects presented by i) the ionosphere ii) antenna chromaticity induced by objects in…

Instrumentation and Methods for Astrophysics · Physics 2023-08-08 Sonia Ghosh , Mayuri Sathyanarayana Rao , Saurabh Singh

Fast radio burst (FRB) is a type of extragalactic radio signal characterized by millisecond duration, extremely high brightness temperature, and large dispersion measure. It remains a mystery in the universe. Advancements in instrumentation…

High Energy Astrophysical Phenomena · Physics 2024-09-23 Qin Wu , Fa-Yin Wang

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

The fast temporal structures and cosmological distances of gamma-ray bursts (GRBs) afford a natural laboratory for testing theories of frequency-dependent propagation of high-energy photons, as predicted for quantum gravity (QG). We…

Astrophysics · Physics 2007-05-23 J. P. Norris , J. T. Bonnell , G. F. Marani , J. D. Scargle

We have searched for gamma-ray bursts (GRB) in the BATSE DISCLA data covering the period TJD 8365-10528. We employ an algorithm that uses the background both before and after the onset of the burst, and that requires an excess of at least 5…

Astrophysics · Physics 2009-10-31 M. Schmidt

The Dark Ages Radio Experiment (DARE) seeks to study the cosmic Dark Ages approximately 80 to 420 million years after the Big Bang. Observations require truly quiet radio conditions, shielded from Sun and Earth electromagnetic (EM)…

Instrumentation and Methods for Astrophysics · Physics 2017-02-02 Laura Plice , Ken Galal , Jack O. Burns

ALFABURST has been searching for Fast Radio Bursts (FRBs) commensally with other projects using the Arecibo L-band Feed Array (ALFA) receiver at the Arecibo Observatory since July 2015. We describe the observing system and report on the…

We present the first full release of a survey of the 150 MHz radio sky, observed with the Giant Metrewave Radio Telescope between April 2010 and March 2012 as part of the TGSS project. Aimed at producing a reliable compact source survey,…

Cosmology and Nongalactic Astrophysics · Physics 2017-02-08 H. T. Intema , P. Jagannathan , K. P. Mooley , D. A. Frail

The spectra of repeating fast radio bursts (FRBs) are complex and time-variable, sometimes peaking within the observing band and showing a fractional emission bandwidth of about 10-30%. These spectral features may provide insight into the…

Statistical interpretation of sparsely sampled event rates has become vital for new transient surveys, particularly those aimed at detecting fast radio bursts (FRBs). We provide an accessible reference for a number of simple, but critical,…

Instrumentation and Methods for Astrophysics · Physics 2016-12-06 Scott Vander Wiel , Sarah Burke-Spolaor , Earl Lawrence , Casey J. Law , Geoffrey C. Bower

Gamma-ray bursts (GRBs) are some of the most energetic and exotic events in the Universe, however their behaviour at the highest energies (>10 GeV) is largely unknown. Although the Fermi-LAT space telescope has detected several GRBs in this…

High Energy Astrophysical Phenomena · Physics 2019-08-14 R. D. Parsons , A. Balzer , M. Füssling , C. Hoischen , M. Holler , A. M. W. Mitchell , G. Pühlhofer , G. Rowell , S. Wagner , E. Bissaldi , P. O'Brien , P. H. T. Tam

We have carried out a dedicated transient survey of 300 deg$^2$ of the SDSS Stripe 82 region using the Giant Meterwavelength Radio Telescope (GMRT) at 150 MHz. Our multi-epoch observations, together with the TGSS survey, allow us to probe…

Instrumentation and Methods for Astrophysics · Physics 2019-10-24 A. Hajela , K. P. Mooley , H. T. Intema , D. A. Frail

Fast Radio Bursts (FRBs) are highly energetic, extremely short-lived bursts of radio flashes. Despite extensive research, the exact cause of these outbursts remains speculative. The high luminosity, short duration, and high dispersion…

High Energy Astrophysical Phenomena · Physics 2025-08-26 F. Aharonian , A. Archaryya , J. Aschersleben , H. Ashkar , M. Backes , V. Barbosa. Martins , R. Batzofin , Y. Becherini , D. Berge , K. Bernlöhr , M. Böttcher , C. Boisson , J. Bolmont , M. de. Bony. de. Lavergne , J. Borowska , F. Bradascio , R. Brose , A. Brown , F. Brun , B. Bruno , C. Burger-Scheidlin , S. Casanova , J. Celic , M. Cerruti , T. Chand , S. Chandra , A. Chen , J. Chibueze , O. Chibueze , J. Damascene. Mbarubucyeye , J. de. Assis. Scarpin , A. Djannati-Ataï , J. Djuvsland , A. Dmytriiev , K. Egberts , S. Einecke , J. -P. Ernenwein , C. Escañuela. Nieves , M. Filipovic , G. Fontaine , S. Funk , S. Gabici , J. F. Glicenstein , J. Glombitza , G. Grolleron , B. Heß , W. Hofmann , T. L. Holch , M. Holler , D. Horns , Zhiqiu. Huang , A. Jaitly , M. Jamrozy , F. Jankowsky , I. Jung-Richardt , E. Kasai , K. Katarzyński , D. Kerszberg , R. Khatoon , B. Khélifi , W. Kluźniak , Nu. Komin , K. Kosack , D. Kostunin , A. Kundu , R. G. Lang , S. Le. Stum , A. Lemière , M. Lemoine-Goumard , J. -P. Lenain , A. Luashvili , J. Mackey , D. Malyshev , V. Marandon , R. Marx , A. Mehta , M. Meyer , A. Mitchell , R. Moderski , M. O. Moghadam , E. Moulin , M. de. Naurois , J. Niemiec , P. O'Brien , L. Olivera-Nieto , E. de. Ona. Wilhelmi , M. Ostrowski , S. Panny , M. Panter , R. D. Parsons , U. Pensec , S. Pita , G. Pühlhofer , M. Punch , A. Quirrenbach , S. Ravikularaman , M. Regeard , O. Reimer , H. Ren , B. Reville , F. Rieger , G. Rowell , B. Rudak , K. Sabri , V. Sahakian , H. Salzmann , A. Santangelo , M. Sasaki , J. Schäfer , F. Schüssler , H. M. Schutte , J. N. S. Shapopi , A. Sharma , S. Spencer , Ł. Stawarz , R. Steenkamp , S. Steinmassl , C. Steppa , T. Takahashi , T. Tanaka , M. Tsirou , C. van. Eldik , M. Vecchi , C. Venter , T. Wach , S. J. Wagner , A. Wierzcholska , A. A. Zdziarski , A. Zech , N. Żywucka

Owing to their rapid cooling rate and hence loss-limited propagation distance, cosmic-ray electrons and positrons (CRe) at very high energies probe local cosmic-ray accelerators and provide constraints on exotic production mechanisms such…

High Energy Astrophysical Phenomena · Physics 2024-11-26 F. Aharonian , F. Ait Benkhali , J. Aschersleben , H. Ashkar , M. Backes , V. Barbosa Martins , R. Batzofin , Y. Becherini , D. Berge , K. Bernlöhr , B. Bi , M. Böttcher , C. Boisson , J. Bolmont , M. de Bony de Lavergne , J. Borowska , M. Bouyahiaoui , R. Brose , A. Brown , F. Brun , B. Bruno , T. Bulik , C. Burger-Scheidlin , T. Bylund , S. Casanova , J. Celic , M. Cerruti , T. Chand , S. Chandra , A. Chen , J. Chibueze , O. Chibueze , T. Collins , G. Cotter , J. Damascene Mbarubucyeye , J. Devin , J. Djuvsland , A. Dmytriiev , K. Egberts , S. Einecke , J. -P. Ernenwein , S. Fegan , K. Feijen , G. Fontaine , S. Funk , S. Gabici , Y. A. Gallant , J. F. Glicenstein , J. Glombitza , G. Grolleron , B. Heß , W. Hofmann , T. L. Holch , M. Holler , D. Horns , Zhiqiu Huang , M. Jamrozy , F. Jankowsky , V. Joshi , I. Jung-Richardt , E. Kasai , K. Katarzynski , D. Kerszberg , R. Khatoon , B. Khelifi , W. Kluzniak , Nu. Komin , K. Kosack , D. Kostunin , A. Kundu , R. G. Lang , S. Le Stum , F. Leitl , A. Lemiere , M. Lemoine-Goumard , J. -P. Lenain , F. Leuschner , A. Luashvili , J. Mackey , D. Malyshev , D. Malyshev , V. Marandon , P. Marinos , G. Marti-Devesa , R. Marx , M. Meyer , A. Mitchell , R. Moderski , M. O. Moghadam , L. Mohrmann , A. Montanari , E. Moulin , M. de Naurois , J. Niemiec , S. Ohm , L. Olivera-Nieto , E. de Ona Wilhelmi , M. Ostrowski , S. Panny , M. Panter , D. Parsons , U. Pensec , G. Peron , G. Pühlhofer , M. Punch , A. Quirrenbach , S. Ravikularaman , M. Regeard , A. Reimer , O. Reimer , I. Reis , H. Ren , B. Reville , F. Rieger , G. Rowell , B. Rudak , E. Ruiz-Velasco , V. Sahakian , H. Salzmann , A. Santangelo , M. Sasaki , J. Schäfer , F. Schüssler , H. M. Schutte , J. N. S. Shapopi , A. Sharma , H. Sol , S. Spencer , L. Stawarz , S. Steinmassl , C. Steppa , H. Suzuki , T. Takahashi , T. Tanaka , A. M. Taylor , R. Terrier , M. Tsirou , C. van Eldik , M. Vecchi , C. Venter , J. Vink , T. Wach , S. J. Wagner , A. Wierzcholska , M. Zacharias , A. A. Zdziarski , A. Zech , N. Zywucka

Galactic radio transients (GRTs) are mysterious short-lived (~days to months) radio transients that are quiet at all other wavelengths. Until now, roughly half a dozen such sources have been reported, predominantly towards the Galactic…

In recent years, a new generation of space missions offered great opportunities of discovery in high-energy astrophysics. In this article we focus on the scientific operations of the Gamma-Ray Imaging Detector (GRID) onboard the AGILE space…

Gamma-ray bursts of short duration may harbor vital clues to the range of phenomena producing bursts. However, recent progress from the observation of optical counterparts has not benefitted the study of short bursts. We have searched for…

We are carrying out the GPPS survey by using the FAST, the most sensitive systematic pulsar survey in the Galactic plane. In addition to about 500 pulsars already discovered through normal periodical search, we report here the discovery of…

Magnetars are the leading candidate sources of fast radio bursts (FRBs). However, the observational probes of the connections between magnetars and FRBs are severely limited by the paucity of detection of highly energetic radio events from…

High Energy Astrophysical Phenomena · Physics 2025-12-03 Banshi Lal , Yogesh Maan , Moaz Abdelmaguid , Visweshwar Ram Marthi , Joseph D. Gelfand , Samayra Straal