A5051519130- Gamma-ray bursts and supernovae
- Pulsars and Gravitational Waves Research
- Astrophysics and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Algebraic structures and combinatorial models
- Black Holes and Theoretical Physics
- Advanced X-ray and CT Imaging
- Astronomical Observations and Instrumentation
- Nuclear Physics and Applications
- Geomagnetism and Paleomagnetism Studies
- Latin American social science
- Astro and Planetary Science
- Quantum Chromodynamics and Particle Interactions
- Astronomy and Astrophysical Research
- Political theory and Gramsci
- Ionosphere and magnetosphere dynamics
- Electromagnetic Compatibility and Measurements
- Solar and Space Plasma Dynamics
- Stellar, planetary, and galactic studies
- Particle accelerators and beam dynamics
- Globalization and Cultural Identity
University of Maryland, College Park
1970-2023
Abstract Gamma-ray bursts (GRBs) are fascinating events due to their panchromatic nature. We study optical plateaus in GRB afterglows via an extended search into archival data. comprehensively analyze all published GRBs with known redshifts and observed by many ground-based telescopes (e.g., Subaru Telescope, RATIR) around the world several space-based observatories such as Neil Gehrels Swift Observatory. fit 500 light curves, showing existence of plateau 179 cases. This sample is 75% larger...
Abstract Gamma-ray burst (GRB) afterglow emission can be observed from sub-TeV to radio wavelengths, though only 6.6% of GRBs present afterglows. We examine GRB light curves (LCs) look for the presence plateaus resembling at X-ray and optical wavelengths. analyze 404 literature with fit 82 least five data points a broken power-law model, requiring four parameters. From these, we find 18 that break feature plateau. conduct first multiwavelength study Dainotti correlation between luminosity L...
Gamma-Ray Bursts (GRBs), being observed at high redshift (z = 9.4), vital to cosmological studies and investigating Population III stars. To tackle these studies, we need correlations among relevant GRB variables with the requirement of small uncertainties on their variables. Thus, must have good coverage light curves (LCs). However, gaps in LC hinder precise determination properties are often unavoidable. Therefore, extensive categorization LCs remains a hurdle. We address using 'stochastic...
Gamma-ray Bursts (GRBs) are highly energetic events that can be observed at extremely high redshift. However, inherent bias in GRB data due to selection effects and redshift evolution significantly skew any subsequent analysis. We correct for important variables related the emission, such as burst duration, $T_{90}^*$, prompt isotropic energy, $E_{\rm iso}$, rest-frame end time of plateau $T_{\rm a, radio}^*$, its correspondent luminosity $L_{\rm radio}$, radio afterglow. In particular, we...
Abstract Gamma-ray bursts (GRBs) are extremely high-energy events that can be observed at very high redshift. In addition to γ rays, they emit in X-ray, optical, and sometimes radio wavelengths. Here, following the approach Srinivasaragavan et al.; Dainotti al., we consider 82 GRBs from al. have been optical wavelengths fitted with a broken power law. We relations between spectral temporal indices (closure relations; CRs) according synchrotron forward-shock model evolving constant-density...
Abstract Gamma-ray bursts (GRBs) are one of the most promising transient events for studying multiwavelength observations in extreme conditions. Observation GeV photons from would provide crucial information on GRB physics, including off-axis emission. The Second Burst Catalog (2FLGC) has been announced by Fermi Large Area Telescope (Fermi-LAT) Collaboration. This catalog includes 29 with photon energy higher than 10 GeV. While synchrotron forward-shock model well explained afterglow data...
Gamma-ray bursts (GRBs) are brief, intense pulses of high-energy emission associated with extreme astrophysical phenomena, e.g. the death massive stars or coalescence compact objects. They have been observed at high energies by Fermi Large Area Telescope (LAT), which detects GRBs in 20 MeV–300 GeV energy range. The Fermi-LAT Second GRB Catalog (2FLGC) presents information on 186 from 2008 to 2018. We consider that fitted 2FLGC a broken (21 GRBs) simple power law (65 GRBs), compiling total...
Gamma-Ray Bursts (GRBs) are panchromatic, highly energetic transients whose energy emission mechanism is still debated. One of the possible explanations standard fireball model, which can be tested with closure relations (CRs), or between temporal and spectral indices a GRB. To test these, we compile an extensive sample radio afterglow light curves (LCs) that span from 1997 to 2020, most comprehensive analysis GRBs observations date. We fit 202 LCs 82 distinct broken power law, obtaining 26...
The Second Gamma-ray Burst Catalog (2FLGC) was announced by the Fermi Large Area Telescope (Fermi-LAT) Collaboration. It includes 29 bursts with photon energy higher than 10 GeV. burst (GRB) afterglow observations have been adequately explained classic synchrotron forward-shock model, however, energies greater GeV from these transient events are challenging, if not impossible, to characterize using this model. Recently, closure relations (CRs) of self-Compton (SSC) model evolving in a...
We present the largest optical photometry compilation of Gamma-Ray Bursts (GRBs) with redshifts ($z$). include 64813 observations 535 events (including upper limits) from 28 February 1997 up to 18 August 2023. also a user-friendly web tool \textit{grbLC} which allows users visualization photometry, coordinates, redshift, host galaxy extinction, and spectral indices for each event in our database. Furthermore, we have added Gamma Ray Coordinate Network (GCN) scraper that can be used collect...
Gamma-Ray Bursts (GRBs), being observed at high redshift (z = 9.4), vital to cosmological studies and investigating Population III stars. To tackle these studies, we need correlations among relevant GRB variables with the requirement of small uncertainties on their variables. Thus, must have good coverage light curves (LCs). However, gaps in LC hinder precise determination properties are often unavoidable. Therefore, extensive categorization LCs remains a hurdle. We address using 'stochastic...
The existence of singularities in the electric field continuously stratified plasma is discussed and conflicting reports literature are reconciled.
A bstract We continue the search for rules that govern when off-shell 4D, $$ \mathcal{N} <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>N</mml:mi> </mml:math> = ∞ supermultiplets can be combined to form ∈ supermultiplets. study 𝕊 8 permutations and Height Yielding Matrix Numbers (HYMN) embedded within adinkras correspond these putative 2 Even though HYMN definition was designed distinguish between raising lowering of nodes in one dimensional valise supermultiplets, they...
Gamma-Ray Bursts (GRBs) are panchromatic, highly energetic transients whose energy emission mechanism is still debated. One of the possible explanations standard fireball model, which can be tested with closure relations (CRs), or between temporal and spectral indices a GRB. To test these, we compile an extensive sample radio afterglow light curves (LCs) that span from 1997 to 2020, most comprehensive analysis GRBs observations date. We fit 202 LCs 82 distinct broken power law, obtaining 26...
The Second Gamma-ray Burst Catalog (2FLGC) was announced by the Fermi Large Area Telescope (Fermi-LAT) Collaboration. It includes 29 bursts with photon energy higher than 10 GeV. burst (GRB) afterglow observations have been adequately explained classic synchrotron forward-shock model, however, energies greater GeV from these transient events are challenging, if not impossible, to characterize using this model. Recently, closure relations (CRs) of self-Compton (SSC) model evolving in a...
Gamma-ray bursts (GRBs) are one of the most promising transient events for studying multi-wavelength observations in extreme conditions. Observation GeV photons from would provide crucial information on GRB physics, including off-axis emission. The Second Burst Catalog (2FLGC) was announced by Fermi Large Area Telescope (Fermi-LAT) Collaboration. This catalog includes 29 with photon energy higher than 10 GeV. While synchrotron forward-shock model has well explained afterglow data GRBs,...
We continue the search for rules that govern when off-shell 4D, $\cal N$ = 1 supermultiplets can be combined to form 2 supermultiplets. study ${\mathbb S}_8$ permutations and Height Yielding Matrix Numbers (HYMN) embedded within adinkras correspond these putative Even though HYMN definition was designed distinguish between raising lowering of nodes in one dimensional valises supermultiplets, they are shown accurately select out which combinations Only chiral + vector tensor found have same...