131 citations · 1.1k across the 25 of their papers we have counts for
25 papers
Probing into emission mechanisms of GRB 190530A using time-resolved spectra and polarization studies: Synchrotron Origin?
Rahul Gupta, S. Gupta, T. Chattopadhyay +47
Multi-pulsed GRB 190530A, detected by the GBM and LAT onboard \fermi, is the sixth most fluent GBM burst detected so far. This paper presents the timing, spectral, and polarimetric…
GRB 140102A: Insight into Prompt Spectral Evolution and Early Optical Afterglow Emission
Rahul Gupta, S. R. Oates, S. B. Pandey +38
We present and perform a detailed analysis of multi-wavelength observations of \thisgrb, an optical bright GRB with an observed reverse shock (RS) signature. Observations of this G…
10.4m GTC observations of the nearby VHE-detected GRB 190829A/SN 2019oyw
Y. -D. Hu, A. J. Castro-Tirado, A. Kumar +15
Aims. GRB 190829A (z = 0.0785), detected by Fermi and Swift with two emission episodes separated by a quiescent gap of ~40 s, was also observed by the H.E.S.S. telescopes at Very-H…
Multiwavelength observations of GRB 140629A. A long burst with an achromatic jet break in the optical and X-ray afterglow
Y. -D. Hu, S. R. Oates, V. M. Lipunov +31
We investigate the long GRB140629A through multiwavelength observations, which cover optical, infrared and X-rays between 40s and 3yr after the burst, to derive the properties of t…
A multi-wavelength analysis of a collection of short-duration GRBs observed between 2012-2015
S. B. Pandey, Y. Hu, A. J. Castro-Tirado +71
We investigate the prompt emission and the afterglow properties of short duration gamma-ray burst (sGRB) 130603B and another eight sGRB events during 2012-2015, observed by several…
Solving the conundrum of intervening strong MgII absorbers towards GRBs and quasars
L. Christensen, S. D. Vergani, S. Schulze +33
Previous studies have shown that the incidence rate of intervening strong MgII absorbers towards GRBs were a factor of 2 - 4 higher than towards quasars. Exploring the similar size…
A decade of GRB follow-up by BOOTES in Spain (2003-2013)
Martin Jelínek, Alberto J. Castro-Tirado, Ronan Cunniffe +20
This article covers ten years of GRB follow-ups by the Spanish BOOTES stations: 71 follow-ups providing 23 detections. Follow-ups by BOOTES-1B from 2005 to 2008 were given in the p…
GRB 110715A: The peculiar multiwavelength evolution of the first afterglow detected by ALMA
R. Sánchez-Ramírez, P. J. Hancock, G. Jóhannesson +35
We present the extensive follow-up campaign on the afterglow of GRB 110715A at 17 different wavelengths, from X-ray to radio bands, starting 81 seconds after the burst and extendin…
GRB hosts through cosmic time - VLT/X-Shooter emission-line spectroscopy of 96 GRB-selected galaxies at 0.1 < z < 3.6
T. Krühler, D. Malesani, J. P. U. Fynbo +41
[Abridged] We present data and initial results from VLT/X-Shooter emission-line spectroscopy of 96 GRB-selected galaxies at 0.1<z<3.6, the largest sample of GRB host spectroscopy a…
Spectrophotometric analysis of GRB afterglow extinction curves with X-shooter
J. Japelj, S. Covino, A. Gomboc +21
In this work we use gamma-ray burst (GRB) afterglow spectra observed with the VLT/X-shooter spectrograph to measure rest-frame extinction in GRB lines-of-sight by modeling the broa…
The dark nature of GRB 130528A and its host galaxy
S. Jeong, A. J. Castro-Tirado, M. Bremer +18
We study the dark nature of GRB 130528A through multi-wavelength observations and conclude that the main reason for the optical darkness is local extinction inside of the host gala…
GRB 130925A: an ultra-long Gamma Ray Burst with a dust-echo afterglow, and implications for the origin of the ultra-long GRBs
P. A. Evans, R. Willingale, J. P. Osborne +24
GRB 130925A was an unusual GRB, consisting of 3 distinct episodes of high-energy emission spanning 20 ks, making it a member of the proposed category of `ultra-long' bursts.…
GRB 120422A/SN 2012bz: Bridging the Gap between Low- And High-Luminosity GRBs
S. Schulze, D. Malesani, A. Cucchiara +62
At low redshift, a handful of gamma-ray bursts (GRBs) have been discovered with peak luminosities () substantially lower than the average…
GRB 130606A within a sub-DLA at redshift 5.91
A. J. Castro-Tirado, R. Sánchez-Ramírez, S. L. Ellison +38
Events such as GRB130606A at z=5.91, offer an exciting new window into pre-galactic metal enrichment in these very high redshift host galaxies. We study the environment and host ga…
The metallicity and dust content of a redshift 5 gamma-ray burst host galaxy
M. Sparre, O. E. Hartoog, T. Krühler +26
Observations of the afterglows of long gamma-ray bursts (GRBs) allow the study of star-forming galaxies across most of cosmic history. Here we present observations of GRB 111008A f…
The low-extinction afterglow in the solar-metallicity host galaxy of GRB 110918A
J. Elliott, T. Krühler, J. Greiner +21
Galaxies selected through long gamma-ray bursts (GRBs) could be of fundamental importance when mapping the star formation history out to the highest redshifts. Before using them as…
The low-extinction afterglow in the solar-metallicity host galaxy of gamma-ray burst 110918A
J. Elliott, T. Krühler, J. Greiner +21
Metallicity is theoretically thought to be a fundamental driver in gamma-ray burst (GRB) explosions and energetics, but is still, even after more than a decade of extensive studies…
GRB 081007 and GRB 090424: the surrounding medium, outflows and supernovae
Zhi-Ping Jin, Stefano Covino, Massimo Della Valle +34
We discuss the results of the analysis of multi-wavelength data for the afterglows of GRB 081007 and GRB 090424, two bursts detected by Swift. One of them, GRB 081007, also shows a…
Molecular Hydrogen in the Damped Lyman-alpha System towards GRB 120815A at z=2.36
T. Krühler, C. Ledoux, J. P. U. Fynbo +32
We present the discovery of molecular hydrogen (H_2), including the presence of vibrationally-excited H_2^* in the optical spectrum of the afterglow of GRB 120815A at z=2.36 obtain…
The optical counterpart of the bright X-ray transient Swift J1745-26
T. Muñoz-Darias, A. de Ugarte Postigo, D. M. Russell +13
We present a 30-day monitoring campaign of the optical counterpart of the bright X-ray transient Swift J1745-26, starting only 19 minutes after the discovery of the source. We obse…
Searching for galactic sources in the Swift GRB catalog
J. C. Tello, A. J. Castro-Tirado, J. Gorosabel +6
Since the early 1990s Gamma Ray Bursts have been accepted to be of extra-galactic origin due to the isotropic distribution observed by BATSE and the redshifts observed via absorpti…
Comprehensive multi-wavelength modelling of the afterglow of GRB050525A
L. Resmi, K. Misra, G. Jóhannesson +13
The Swift era has posed a challenge to the standard blast-wave model of Gamma Ray Burst (GRB) afterglows. The key observational features expected within the model are rarely observ…
Prompt, early, and afterglow optical observations of five gamma-ray bursts (GRBs 100901A, 100902A, 100905A, 100906A, and 101020A)
E. S. Gorbovskoy, G. V. Lipunova, V. M. Lipunov +35
We present results of the prompt, early, and afterglow optical observations of five gamma-ray bursts, GRBs 100901A, 100902A, 100905A, 100906A, and 101020A, made with the Mobile Ast…
Panchromatic observations of the textbook GRB 110205A: constraining physical mechanisms of prompt emission and afterglow
W. Zheng, R. F. Shen, T. Sakamoto +56
We present a comprehensive analysis of a bright, long duration (T90 ~ 257 s) GRB 110205A at redshift z= 2.22. The optical prompt emission was detected by Swift/UVOT, ROTSE-IIIb and…