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Gamma ray burst (GRB) objects are now widely thought to be at cosmological distances, and thus represent enormous energy emission. Gamma ray spectra extending to $GeV$ energies suggest the possiblity of accompanying neutrino emission, and…

高能物理 - 唯象学 · 物理学 2007-05-23 T. J. Weiler , W. A. Simmons , S. Pakvasa , J. G. Learned

Next-generation cosmic microwave background (CMB) experiments will have lower noise and therefore increased sensitivity, enabling improved constraints on fundamental physics parameters such as the sum of neutrino masses and the…

宇宙学与河外天体物理 · 物理学 2020-06-16 João Caldeira , W. L. Kimmy Wu , Brian Nord , Camille Avestruz , Shubhendu Trivedi , Kyle T. Story

The origin of the prompt emission in gamma-ray bursts (GRBs) is still an unsolved problem and several different mechanisms have been suggested. Here we fit Fermi GRB data with a photospheric emission model which includes dissipation of the…

高能天体物理现象 · 物理学 2015-09-30 Björn Ahlgren , Josefin Larsson , Tanja Nymark , Felix Ryde , Asaf Pe'er

Gamma-ray bursts (GRBs) must originate from low baryon load, ultrarelativistic outflows; however, slower, more baryon-rich outflows (BROs) should also arise in connection with GRBs as ``circum-jet winds'' and/or ``failed GRBs''. We study…

天体物理学 · 物理学 2007-05-23 Susumu Inoue , Nobuyuki Iwamoto , Manabu Orito , Mariko Terasawa

Since the discovery of Gamma-Ray Bursts (GRBs), attempts have been made to detect correlated optical transient emission from these objects. In January 1999, the ROTSE I robotic telescope detected a bright optical flash simultaneous with a…

天体物理学 · 物理学 2007-05-23 Eliana Palazzi , Elena Pian

In this work, we propose a novel ensemble of recurrent neural networks (RNNs) that considers the multiband and non-uniform cadence without having to compute complex features. Our proposed model consists of an ensemble of RNNs, which do not…

天体物理仪器与方法 · 物理学 2025-01-27 I. Becker , P. Protopapas , M. Catelan , K. Pichara

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…

天体物理学 · 物理学 2008-10-09 D. Dornic , G. Lelaizant

Gamma ray bursts (GRBs) are the most energetic eruptions known in the Universe. Instruments such as Compton-GRO/BATSE and the GRB monitor on BeppoSAX have detected more than 2700 GRBs and, although observational confirmation is still…

Gamma-Ray Bursts (GRBs) are extra-galactic and extremely energetic transient emissions of gamma rays, which are thought to be associated with the death of massive stars or the merger of compact objects in binary systems. Their huge…

高能天体物理现象 · 物理学 2016-07-20 F. Piron

Gamma-ray Bursts (GRBs) are valuable probes of cosmic star formation reaching back into the epoch of reionization, and a large dataset with known redshifts ($z$) is an important ingredient for these studies. Usually, $z$ is measured using…

Coalescing binaries in distant galaxies are one of the most promising sources of gravitational waves detectable by the LIGO project.$^{[1-5]}$ They are also a copious source of neutrinos,$^{[1]}$ however these neutrino pulses are far too…

天体物理学 · 物理学 2009-10-22 Christopher S. Kochanek , Tsvi Piran

Low-light video deblurring poses significant challenges in applications like nighttime surveillance and autonomous driving due to dim lighting and long exposures. While event cameras offer potential solutions with superior low-light…

计算机视觉与模式识别 · 计算机科学 2026-02-09 Mingchen Zhong , Xin Lu , Dong Li , Senyan Xu , Ruixuan Jiang , Xueyang Fu , Baocai Yin

Gamma-Ray Bursts (GRBs) are the must violent explosions after the Big-Bang. Their high energy radiation can potentially carry information about the most inner part of the accretion disk of a collapsing star, ionize the surrounding material…

高能天体物理现象 · 物理学 2011-12-19 Houri Ziaeepour

The current knowledge in cosmology deals with open problems whose solutions are still under investigation. The main issue is the so-called Hubble constant ($H_0$) tension, namely, the $4-6 \sigma$ discrepancy between the local value of…

宇宙学与河外天体物理 · 物理学 2025-01-23 Maria Giovanna Dainotti , Biagio De Simone , Aditya Narendra , Agnieszka Pollo

We present a comprehensive study of the morphological properties of 42 gamma-ray burst (GRB) host galaxies imaged with the Hubble Space Telescope in the optical band. The purpose of this study is to understand the relation of GRBs to their…

天体物理学 · 物理学 2009-09-29 C. Wainwright , E. Berger , B. E. Penprase

It is now generally accepted that long-duration gamma ray bursts (GRBs) are due to the collapse of massive rotating stars. The precise collapse process itself, however, is not yet fully understood. Strong winds, outbursts, and intense…

高能天体物理现象 · 物理学 2015-06-04 Robert A. Mesler , Daniel J. Whalen , Nicole M. Lloyd-Ronning , Chris L. Fryer , Ylva M. Pihlström

We present an analysis of gamma-ray burst (GRB) progenitor classification, through their positions on a Uniform Manifold Approximation and Projection (UMAP) plot, constructed by Negro et al. 2024, from Fermi-GBM waterfall plots. The…

高能天体物理现象 · 物理学 2025-08-29 Sharleen N. Espinoza , Nicole M. Lloyd-Ronning , Michela Negro , Roseanne M. Cheng , Nicoló Cibrario

Prompt {\gamma}-ray emissions from gamma-ray bursts (GRBs) exhibit a vast range of extremely complex temporal structures with a typical variability time-scale significantly short - as fast as milliseconds. This work aims to investigate the…

高能天体物理现象 · 物理学 2011-09-28 G. Greco , R. Rosa , G. Beskin , S. Karpov , L. Romano , A. Guarnieri , C. Bartolini , R. Bedogni

Gamma-ray bursts (GRBs) comprise of short, bright, energetic flashes of emission from extragalactic sources followed by a longer afterglow phase of decreased brightness. Recent discoveries of very-high-energy (VHE, $\gtrsim 100$ GeV)…

高能天体物理现象 · 物理学 2024-01-12 Monica Barnard , Soebur Razzaque , Jagdish C. Joshi

Exoplanet detection by direct imaging is a difficult task: the faint signals from the objects of interest are buried under a spatially structured nuisance component induced by the host star. The exoplanet signals can only be identified when…

天体物理仪器与方法 · 物理学 2023-06-22 Olivier Flasseur , Théo Bodrito , Julien Mairal , Jean Ponce , Maud Langlois , Anne-Marie Lagrange