High-energy gamma-ray afterglows from low-luminosity gamma-ray bursts (2009)
He, Hao-Ning, Wang, Xiang-Yu, Yu, Yun-Wei, Meszaros, Peter
The observations of gamma-ray bursts (GRBs) such as 980425, 031203 and 060218, with luminosities much lower than those of other classic bursts, lead to the definition of a new class of GRBs --...
Corsi, Alessandra, Meszaros, Peter
The existence of a shallow decay phase in the early X-ray afterglows of gamma-ray bursts is a common feature. Here we investigate the possibility that this is connected to the formation of a highly...
An up-scattered cocoon emission model of Gamma-Ray Burst high-energy lags (2009)
Toma, Kenji, Wu, Xue-Feng, Meszaros, Peter
The Fermi Gamma-ray Space Telescope recently detected the most energetic gamma-ray burst so far, GRB 080916C, and reported its detailed temporal properties in an extremely broad spectral range: (i)...
Probing the birth of fast rotating magnetars through high-energy neutrinos (2009)
Murase, Kohta, Meszaros, Peter, Zhang, Bing
We investigate the high-energy neutrino emission expected from newly born magnetars surrounded by their stellar ejecta. Protons might be accelerated up to 0.1-100 EeV energies possibly by, e.g., the...
GRB 080916C: on the radiation origin of the prompt emission from KeV/MeV to GeV (2009)
Wang, Xiang-Yu, Li, Zhuo, Dai, Zi-Gao, Meszaros, Peter
Fermi observations of high-energy gamma-ray emission from GRB 080916C shows that its spectrum is consistent with the Band function from MeV to tens of GeV. Assuming one single emission mechanism...
Multi-Messenger Astronomy with GRBs: A White Paper for the Astro2010 Decadal Survey (2009)
Stamatikos, Michael, Gehrels, Neil, Halzen, Francis, Meszaros, Peter, Roming, Peter W. A.
Gamma-ray Bursts (GRBs) are relativistic cosmological beacons of transient high energy radiation whose afterglows span the electromagnetic spectrum. Theoretical expectations of correlated neutrino...
Zhang, Bing, Zhang, Bin-Bin, Virgili, Francisco J., Liang, En-Wei, Kann, D. Alexander, Wu, Xue-Feng, ...
(Abridged) The highest redshift (z=6.7) gamma-ray burst (GRB) 080913 recently detected by Swift is an intrinsically short, hard GRB. It would be recognized by BATSE as a short/hard GRB should it have...
The Correlation of Spectral Lag Evolution with Prompt Optical Emission in GRB 080319B (2009)
Stamatikos, Michael, Ukwatta, Tilan N., Sakamoto, Takanori, Dhuga, Kalvir S., Toma, Kenji, Pe'er, Asaf, ...
We report on observations of correlated behavior between the prompt gamma-ray and optical emission from GRB 080319B, which confirm that (i) they occurred within the same astrophysical source region...
Hypernova and Gamma-Ray Burst Remnants as TeV Unidentified Sources (2009)
Ioka, Kunihito, Meszaros, Peter
We investigate hypernova (hyper-energetic supernova) and gamma-ray burst (GRB) remnants in our Galaxy as TeV gamma-ray sources, particularly in the role of potential TeV unidentified sources, which...
Wang, Xiang-Yu, Li, Zhuo, Waxman, Eli, Meszaros, Peter
We suggest that non-thermal emission can be produced by multiple scatterings of the photons between the supernova ejecta and pre-shock material in supernova shock breakout. Such bulk-Comptonization...
Broadband Radiation from Primary Electrons in Very Energetic Supernovae (2008)
Ando, Shin'ichiro, Meszaros, Peter
A class of very energetic supernovae (hypernovae) is associated with long gamma-ray bursts, in particular with a less energetic but more frequent population of gamma-ray bursts. Hypernovae also...
GRB 060607A: A GRB with Bright Asynchronous Early $X$-ray and Optical Emissions (2007)
Ziaeepour, Houri, Holland, Stephen T., Boyd, Patricia T., Page, Kim L., Oates, Samantha, Markwardt, Craig B., ...
The early optical emission of the moderately high redshift ($z=3.08$) GRB 060607A shows a remarkable broad and strong peak with a rapid rise and a relatively slow power-law decay. It is not...
On the Origin and Survival of UHE Cosmic-Ray Nuclei in GRBs and Hypernovae (2007)
Wang, Xiang-Yu, Razzaque, Soebur, Meszaros, Peter
The chemical composition of the ultra-high-energy (UHE) cosmic rays serves as an important clue for their origin. Recent measurements of the elongation rates by the Pierre Auger Observatory hint at...
Photon Acceleration at Shock Breakout of Trans-Relativistic Supernova (2007)
Li, Zhuo, Wang, Xiang-Yu, Waxman, Eli, Meszaros, Peter
The predicted thermal flash from SN shock breakout might have been detected for the first time by Swift in GRB 060218/SN 2006aj. The detected thermal X-ray emission in this event implies emergence of...
High-energy Cosmic Rays and Neutrinos from Semi-relativistic Hypernovae (2007)
Wang, Xiang-Yu, Razzaque, Soebur, Meszaros, Peter, Dai, Zi-Gao
The origin of the ultrahigh-energy (UHE) cosmic rays (CRs) from the second knee ($\sim6\times10^{17}$eV) above in the CR spectrum is still unknown. Recently, there has been growing evidence that a...
High-Energy Gamma-Rays from GRB X-ray Flares (2007)
Wang, Xiang-Yu, Li, Zhuo, Meszaros, Peter
The recent detection of X-ray flares during the afterglow phase of gamma-ray bursts (GRBs) suggests an inner-engine origin, at radii inside the forward shock. There must be inverse Compton (IC)...
GRB Precursors in the Fallback Collapsar Scenario (2007)
Wang, Xiang-Yu, Meszaros, Peter
Precursor emission has been observed in a non-negligible fraction of gamma-ray bursts.The time gap between the precursor and the main burst extends in some case up to hundreds of seconds, such as in...
Making a Short Gamma-Ray Burst from a Long one: Implications for the Nature of GRB 060614 (2006)
Zhang, Bing, Zhang, Bin-Bin, Liang, En-Wei, Gehrels, Neil, Burrows, David N., Meszaros, Peter
The absence of a supernova accompanying the nearby long GRB 060614 poses a great puzzle about the progenitor of this event and challenges the current GRB classification scheme. This burst displays a...
Grupe, Dirk, Gronwall, Caryl, Wang, Xiang-Yu, Roming, Peter, Cummings, Jay, Zhang, Bing, ...
We report the results of the Swift and XMM observations of the Swift-discovered long Gamma-Ray Burst GRB 060729 ($T_{90}$=115s). The afterglow of this burst was exceptionally bright in X-rays as well...
GRB Radiative Efficiencies Derived from the Swift Data: GRBs vs. XRFs, Long vs. Short (2006)
Zhang, Bing, Liang, Enwei, Page, Kim L., Grupe, Dirk, Zhang, Bin-Bin, Barthelmy, Scott D., ...
We systematically analyze the prompt emission and the early afterglow data of a sample of 31 GRBs detected by {\em Swift} before September 2005, and estimate the GRB radiative efficiency. BAT's...
Gamma-Ray Burst Spectral Correlations: Photospheric and Injection Effects (2006)
Ryde, Felix, Bjornsson, Claes-Ingvar, Kaneko, Yuki, Meszaros, Peter, Preece, Robert, Battelino, Milan
We present a physical framework that can account for most of the observed spectral properties of the prompt gamma-ray burst emission. This includes the variety of spectral shapes, shape evolutions,...
Nonthermal gamma-ray and X-ray flashes from shock breakout in gamma-ray bursts/supernovae (2006)
Wang, Xiang-Yu, Li, Zhuo, Waxman, Eli, Meszaros, Peter
Thermal X-ray emission which is simultaneous with the prompt gamma-rays has been detected for the first time from a supernova connected with a gamma-ray burst (GRB), namely GRB060218/SN2006aj. It has...
GRB 060313: A New Paradigm for Short-Hard Bursts? (2006)
Roming, Peter W. A., Berk, Daniel Vanden, Palshin, Valentin, Pagani, Claudio, Norris, Jay, Kumar, Pawan, ...
We report the simultaneous observations of the prompt emission in the gamma-ray and hard X-ray bands by the Swift-BAT and the KONUS-Wind instruments of the short-hard burst, GRB 060313. The...
Jet Breaks in Short Gamma-Ray Bursts. II: The Collimated Afterglow of GRB 051221A (2006)
Burrows, David N., Grupe, Dirk, Capalbi, Milvia, Panaitescu, Alin, Patel, Sandeep K., Kouveliotou, Chryssa, ...
We report the best evidence to date of a jet break in a short Gamma-Ray Burst (GRB) afterglow, using Chandra and Swift XRT observations of the X-ray afterglow of GRB 051221A. The combined X-ray light...
GeV photons from up-scattering of supernova shock breakout X-rays by an outside GRB jet (2006)
Wang, Xiang-Yu, Meszaros, Peter
Shock breakout X-ray emission has been reported for the first time from a supernova connected with a gamma-ray burst, namely GRB060218/SN2006aj. The gamma-ray emission and the power-law decaying...
Swift Observations of GRB 050603: An afterglow with a steep late time decay slope (2006)
Grupe, Dirk, Brown, Peter, Cummings, Jay, Zhang, Bing, Retter, Alon, Burrows, David N., ...
We report the results of Swift observations of the Gamma Ray Burst GRB 050603. With a V magnitude V=18.2 about 10 hours after the burst the optical afterglow was the brightest so far detected by...
Beta decay radiation signature from neutron-rich gamma-ray bursts? (2006)
Razzaque, Soebur, Meszaros, Peter
Core collapse of massive stars and binary neutron stars or black hole-neutron star binary mergers are likely progenitors of long and short duration gamma-ray bursts respectively. Neutronized material...
MeV-GeV emission from neutron-loaded short gamma-ray burst jets (2006)
Razzaque, Soebur, Meszaros, Peter
Recent discovery of the afterglow emission from short gamma-ray bursts suggests that binary neutron star or black hole-neutron star binary mergers are the likely progenitors of these short bursts....
GeV-TeV and X-ray flares from gamma-ray bursts (2006)
Wang, Xiang-Yu, Li, Zhuo, Meszaros, Peter
The recent detection of delayed X-ray flares during the afterglow phase of gamma-ray bursts (GRBs) suggests an inner-engine origin, at radii inside the deceleration radius characterizing the...
High energy neutrinos from a slow jet model of core collapse supernovae (2005)
Razzaque, Soebur, Meszaros, Peter, Waxman, Eli
It has been hypothesized recently that core collapse supernovae are triggered by mildly relativistic jets following observations of radio properties of these explosions. Association of a jet, similar...
Razzaque, Soebur, Meszaros, Peter, Waxman, Eli
The ratio of anti-electron to total neutrino flux, $\Phi_{\bar{\nu}_e}:\Phi_\nu$, expected from $p\gamma$ interactions in astrophysical sources is $\le1:15$. We point out that this ratio is enhanced...
Zhang, Bing, Fan, Y. Z., Dyks, Jaroslaw, Kobayashi, Shiho, Meszaros, Peter, Burrows, David N., ...
(Abridged) The Swift X-Ray Telescope (XRT) reveals some interesting features of early X-ray afterglows, including a distinct rapidly decaying component preceding the conventional afterglow component...
A Gamma-Ray Bursts' Fluence-Duration Correlation (2005)
Horvath, Istvan, Balazs, Lajos G., Meszaros, Peter, Bagoly, Zsolt, Meszaros, Attila
We present an analysis indicating that there is a correlation between the fluences and the durations of gamma-ray bursts, and provide arguments that this reflects a correlation between the total...
Inverse Compton X-ray Flare from GRB Reverse Shock (2005)
Kobayashi, Shiho, Zhang, Bing, Meszaros, Peter, Burrows, David N.
We study synchrotron self-inverse Compton radiation from a reverse-shocked fireball. If the inverse Compton process dominates the cooling of shocked electrons, an X-ray flare produced by the first...
TeV-PeV Neutrinos from Giant Flares of Magnetars and the Case of SGR 1806-20 (2005)
Ioka, Kunihito, Razzaque, Soebur, Kobayashi, Shiho, Meszaros, Peter
We estimate the high energy neutrino flux from the giant flare of SGR 1806-20 on December 27, 2004, which irradiated Earth with a gamma-ray flux ~10^4 times larger than the most luminous gamma-ray...
Ioka, Kunihito, Meszaros, Peter
We consider the spatial clustering of massive black hole (MBH) mergers, and discuss possible ways to use gravitational wave observations in the LISA and DECIGO/BBO range for obtaining cosmological...
Swift XRT and VLT Observations of the Afterglow of GRB 041223 (2005)
Burrows, David N., Hill, Joanne E., Chincarini, Guido, Tagliaferri, Gianpiero, Campana, Sergio, Moretti, Alberto, ...
The Swift Gamma-Ray Burst Explorer, launched on 2004 November 20, is a multiwavelength, autonomous, rapid-slewing observatory for gamma-ray burst (GRB) astronomy. On 2004 December 23, during the...
APS Neutrino Study: Report of the Neutrino Astrophysics and Cosmology Working Group (2004)
Barwick, Steve W., Beacom, John F., Cianciolo, Vince, Dodelson, Scott, Feng, Jonathan L., Fuller, George M., ...
In 2002, Ray Davis and Masatoshi Koshiba were awarded the Nobel Prize in Physics ``for pioneering contributions to astrophysics, in particular for the detection of cosmic neutrinos.'' However, while...
Optical afterglows of short Gamma-ray Bursts and GRB 040924 (2004)
Fan, Y. Z., Zhang, Bing, Kobayashi, Shiho, Meszaros, Peter
Short-duration Gamma-ray bursts (GRBs) (\leq 2{\rm s}) have remained a mystery due to the lack of afterglow detection until recently. The models to interpret short GRBs invoke distinct progenitor...
High energy neutrinos from radio-quiet AGNs (2004)
Alvarez-Muñiz, Jaime, Meszaros, Peter
Most active galactic nuclei (AGN) lack prominent jets, and show modest radio emission and significant X-ray emission which arises mainly from the galactic core, very near from the central black hole....
Ioka, Kunihito, Meszaros, Peter
We investigate the radio afterglows of gamma-ray bursts (GRBs) and hypernovae (HNe) at high redshifts and quantify their detectability, as well as their potential usefulness for 21 cm absorption line...
Extended GeV-TeV Emission around Gamma-Ray Burst Remnants, and the Case of W49B (2004)
Ioka, Kunihito, Kobayashi, Shiho, Meszaros, Peter
We investigate the high-energy photon emission around Gamma-Ray Burst (GRB) remnants caused by ultrahigh-energy cosmic rays (UHECRs) from the GRBs. We apply the results to the recent report that the...
Gravitational Wave and X-ray Signals from Stellar Disruption by a Massive Black Hole (2004)
Kobayashi, Shiho, Laguna, Pablo, Phinney, E. Sterl, Meszaros, Peter
Gravitational waves and X-ray flares are expected from tidal disruption of stars by a massive black hole. Using a relativistic smoothed particle hydrodynamics code, we investigate the fate of main...
GeV and higher energy photon interactions in gamma-ray burst fireballs and surroundings (2004)
Razzaque, Soebur, Meszaros, Peter, Zhang, Bing
We have calculated the opacities and secondary production mechanisms of high energy photons arising in gamma-ray burst internal shocks, using exact cross-sections for the relevant processes. We find...
High Energy Emission from the Double Pulsar system J0737-3039 (2004)
Granot, Jonathan, Meszaros, Peter
We discuss the effects of particle acceleration at the bow shocks expected in the binary pulsar system J0737-3039, due to the wind from pulsar A interacting with both the interstellar medium (ISM),...
Zhang, Bing, Kobayashi, Shiho, Meszaros, Peter, Lloyd-Ronning, Nicole M., Dai, Xinyu
Two separate topics are discussed. (1) We describe the classifications of the long GRB early afterglow lightcurves within the framework of the fireball shock model, focusing on the interplay between...
Gamma-Ray Bursts: Progress, Problems & Prospects (2003)
The cosmological gamma-ray burst (GRB) phenomenon is reviewed. The broad observational facts and empirical phenomenological relations of the GRB prompt emission and afterglow are outlined. A...
Quasi-universal Gaussian jets: a unified picture for gamma-ray bursts and X-ray flashes (2003)
Zhang, Bing, Dai, Xinyu, Lloyd-Ronning, Nicole M., Meszaros, Peter
An observed correlation Ep \propto (E_{iso})^{1/2} extending from Gamma-ray Bursts (GRBs) to X-ray flashes (XRFs) poses problems both for a power-law universal jet model where the energy per solid...
A Characteristic Dense Environment or Wind Signature in Prompt GRB Afterglows (2003)
Kobayashi, Shiho, Meszaros, Peter, Zhang, Bing
We discuss the effects of synchrotron self-absorption in the prompt emission from the reverse shock of GRB afterglows occurring in a dense environment, such as the wind of a massive stellar...
Neutrino signatures of the supernova - gamma ray burst relationship (2003)
Razzaque, Soebur, Meszaros, Peter, Waxman, Eli
We calculate the TeV-PeV neutrino fluxes of gamma-ray bursts associated with supernovae, based on the observed association between GRB 030329 and supernova SN 2003dh. The neutrino spectral flux...
Neutrino Tomography of Gamma Ray Bursts and Massive Stellar Collapses (2003)
Razzaque, Soebur, Meszaros, Peter, Waxman, Eli
Neutrinos at energies above TeV can serve as probes of the stellar progenitor and jet dynamics of gamma ray bursts arising from stellar core collapses. They can also probe collapses which do not lead...
Neutrino-Driven Explosions in GRBs and Hypernovae (2003)
Fryer, Chris L., Meszaros, Peter
We study the physics behind the neutrino-driven mechanism for gamma-ray bursts and hypernovae, deriving the critical density at which these outbursts occur in the collapsar model. The agreement...
Zhang, Bing, Kobayashi, Shiho, Meszaros, Peter
Early optical afterglows have been observed from GRB 990123, GRB 021004, and GRB 021211, which reveal rich emission features attributed to reverse shocks. It is expected that Swift will discover many...
High Energy Neutrinos from Gamma-Ray Bursts with Precursor Supernovae (2002)
Razzaque, Soebur, Meszaros, Peter, Waxman, Eli
The high energy neutrino signature from proton-proton and photo-meson interactions in a supernova remnant shell ejected prior to a gamma-ray burst provides a test for the precursor supernova, or...
Polarized Gravitational Waves from Gamma-Ray Bursts (2002)
Kobayashi, Shiho, Meszaros, Peter
Significant gravitational wave emission is expected from gamma-ray bursts arising from compact stellar mergers, and possibly also from bursts associated with fast-rotating massive stellar core...
Some recent developments in gamma-ray burst afterglow and prompt emission models (2002)
Zhang, Bing, Meszaros, Peter, Wang, Junfeng
Extensive observational campaigns of afterglow hunting have greatly enriched our understanding of the gamma-ray burst (GRB) phenomenon. Efforts have been made recently to explore some afterglow...
Gravitational Radiation from Gamma-Ray Burst Progenitors (2002)
Kobayashi, Shiho, Meszaros, Peter
We study gravitational radiation from various proposed gamma-ray burst (GRB) progenitor models, in particular compact mergers and massive stellar collapses. These models have in common a high angular...
An analysis of gamma-ray burst spectral break models (2002)
Typical gamma-ray burst spectra are characterized by a spectral break, Ep, which for bright BATSE bursts is found to be narrowly clustered around 300 keV. Recently identified X-ray flashes, which may...
Gamma-ray burst beaming: a universal configuration with a standard energy reservoir? (2001)
We consider a gamma-ray burst (GRB) model based on an anisotropic fireball with an axisymmetric power-law distribution of the energy per solid angle with index -k, and allow for the observer's...
Gamma-ray bursts with continuous energy injection and their afterglow signature (2001)
(Abridged) We discuss a Gamma-ray burst (GRB) fireball with an additional energy injection, either in the form of a Poynting-flux-dominated outflow or a kinetic-energy-dominated matter shell injected...
High Energy Spectral Components in Gamma-Ray Burst Afterglows (2001)
We investigate two high energy radiation mechanisms, the proton synchrotron and the electron inverse Compton emission, and explore their possible signatures in the broad-band spectra and in the keV...
We investigate the consequences of a continuously injecting central engine on the gamma-ray burst afterglow emission, focusing more specifically on a highly-magnetized millisecond pulsar engine. For...
Gruzinov, Andrei, Meszaros, Peter
MeV seed photons produced in shocks in a variable ultra-relativistic outflow gain energy by the Fermi mechanism, because the photons Compton scatter off relativistically colliding shells. The...
5-10 GeV Neutrinos from Gamma-Ray Burst Fireballs (2000)
Bahcall, John N., Meszaros, Peter
A gamma-ray burst fireball is likely to contain an admixture of neutrons, in addition to protons, in essentially all progenitor scenarios. Inelastic collisions between differentially streaming...
Impulsive and Varying Injection in GRB Afterglows (2000)
The standard model of Gamma-Ray Bursts afterglows is based on synchrotron radiation from a blast wave produced when the relativistic ejecta encounters the surrounding medium. We reanalyze the...
Shocked by GRB 970228: the afterglow of a cosmological fireball (1997)
Rees, Martin J., Meszaros, Peter
The location accuracy of the BeppoSAX Wide Field Cameras and acute ground-based followup have led to the detection of a decaying afterglow in X rays and optical light following the classical...
Spectra of Unsteady Wind Models of Gamma-Ray Bursts (1996)
Papathanassiou, Hara, Meszaros, Peter
We calculate the spectra expected from unsteady relativistic wind models of gamma-ray bursts, suitable for events of arbitrary duration. The spectral energy distribution of the burst is calculated...