363 citations · 2.1k across the 23 of their papers we have counts for
23 papers
Revealing characteristics of dark GRB 150309A: dust extinguished or high-z?
A. J. Castro-Tirado, Rahul Gupta, S. B. Pandey +28
Dark GRBs constitute a significant fraction of the GRB population. In this paper, we present the multiwavelength analysis of an intense two-episodic GRB 150309A observed early on t…
GRB 980425 host: [CII], [OI] and CO lines reveal recent enhancement of star formation due to atomic gas inflow
Michał J. Michałowski, J. M. Castro Ceron, J. L. Wardlow +18
We have recently suggested that gas accretion can be studied using host galaxies of gamma-ray bursts (GRBs). We obtained the first ever far-infrared (FIR) line observations of a GR…
Massive stars formed in atomic hydrogen reservoirs: HI observations of gamma-ray burst host galaxies
Michał J. Michałowski, G. Gentile, J. Hjorth +30
Long gamma-ray bursts (GRBs), among the most energetic events in the Universe, are explosions of massive and short-lived stars, so they pinpoint locations of recent star formation.…
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…
Spatially-resolved dust properties of the GRB 980425 host galaxy
Michał J. Michałowski, L. K. Hunt, E. Palazzi +30
Gamma-ray bursts (GRBs) have been proposed as a tool for studying star formation in the Universe, so it is crucial to investigate whether their host galaxies and immediate environm…
The wideband backend at the MDSCC in Robledo. A new facility for radio astronomy at Q- and K- bands
J. R. Rizzo, A. Pedreira, M. Gutiérrez +11
The antennas of NASA's Madrid Deep Space Communications Complex (MDSCC) in Robledo de Chavela are available as single-dish radio astronomical facilities during a significant percen…
An extremely luminous panchromatic outburst from the nucleus of a distant galaxy
A. J. Levan, N. R. Tanvir, S. B. Cenko +58
Variable X-ray and gamma-ray emission is characteristic of the most extreme physical processes in the Universe, and studying the sources of these energetic photons has been a major…
A nearby GRB host prototype for z~7 Lyman-break galaxies: Spitzer-IRS and X-shooter spectroscopy of the host galaxy of GRB031203
D. Watson, J. French, L. Christensen +7
Gamma-ray burst (GRB) host galaxies have been studied extensively in optical photometry and spectroscopy. Here we present the first mid-infrared spectrum of a GRB host, HG031203. I…
GRB 021004: Tomography of a gamma-ray burst progenitor and its host galaxy
A. J. Castro-Tirado, P. Möller, G. García-Segura +23
We analyse the distribution of matter around the progenitor star of gamma-ray burst GRB 021004 as well as the properties of its host galaxy with high-resolution echelle as well as…
On the distribution of stellar masses in gamma-ray burst host galaxies
J. M. Castro Cerón, M. J. Michałowski, J. Hjorth +6
We analyse Spitzer images of 30 long-duration gamma-ray burst (GRB) host galaxies. We estimate their total stellar masses (M*) based on the rest-frame K-band luminosities (L_Krest)…
The Afterglows of Swift-era Gamma-Ray Bursts. I. Comparing pre-Swift and Swift era Long/Soft (Type II) GRB Optical Afterglows
D. A. Kann, S. Klose, B. Zhang +73
We have gathered optical photometry data from the literature on a large sample of Swift-era gamma-ray burst (GRB) afterglows including GRBs up to September 2009, for a total of 76…
Star formation rates and stellar masses in z ~ 1 gamma ray burst hosts
J. M. Castro Cerón, M. J. Michałowski, J. Hjorth +3
We analyse 4.5, 8 and 24 um band Spitzer images of six gamma ray burst host galaxies at redshifts close to 1. We constrain their star formation rates (SFR) based on the entire avai…
Probing Cosmic Chemical Evolution with Gamma-Ray Bursts: GRB060206 at z=4.048
J. P. U. Fynbo, R. L. C. Starling, C. Ledoux +25
Aim: We present early optical spectroscopy of the afterglow of the gamma-ray burst GRB 060206 with the aim of determining the metallicity of the GRB absorber and the physical condi…
A mean redshift of 2.8 for Swift gamma-ray bursts
P. Jakobsson, A. Levan, J. P. U. Fynbo +18
The exceptionally high luminosities of gamma-ray bursts (GRBs), gradually emerging as extremely useful probes of star formation, make them promising tools for exploration of the hi…
The host galaxy cluster of the short gamma-ray burst GRB 050509B
K. Pedersen, A. Eliasdottir, J. Hjorth +7
The first arcsecond localization of a short gamma-ray burst, GRB 050509B, has enabled detailed studies of a short burst environment. We here report on studies of the environment of…
A log N(HI) = 22.6 DLA in a dark gamma-ray burst: the environment of GRB 050401
D. Watson, J. P. U. Fynbo, C. Ledoux +33
The optical afterglow spectrum of GRB050401 (at z=2.8992+/-0.0004) shows the presence of a DLA, with log(nHI)=22.6+/-0.3. This is the highest column density ever observed in a DLA,…
On the Afterglow and Host Galaxy of GRB021004: A Comprehensive Study with the Hubble Space Telescope
J. P. U. Fynbo, J. Gorosabel, A. Smette +24
(Abridged) We report on HST observations of the late-time afterglow and host galaxy of GRB021004 (z=2.33). Although this GRB is one of the best observed so far, there is substantia…
Probing a GRB progenitor at a redshift of z=2: a comprehensive observing campaign of the afterglow of GRB 030226
S. Klose, J. Greiner, A. Rau +38
We report results from a comprehensive follow-up observing campaign of the afterglow of GRB 030226, including VLT spectroscopy, VLT polarimetry, and Chandra X-ray observations. In…
Discovery of the Near-IR Afterglow and of the Host of GRB 030528
A. Rau, J. Greiner, S. Klose +24
The rapid dissemination of an arcmin-sized HETE-2 localization of the long-duration X-ray flash GRB 030528 led to a ground-based multi-observatory follow-up campaign. We report the…
Optical and near-infrared observations of the GRB020405 afterglow
N. Masetti, E. Palazzi, E. Pian +33
(Abridged) We report on observations of the optical and NIR afterglow of GRB020405. Ground-based optical observations started about 1 day after the GRB and spanned a period of ~10…
Detection of an optical transient following the 13 March 2000 short/hard gamma-ray burst
A. J. Castro-Tirado, J. M. Castro Cerón, J. Gorosabel +21
We imaged the error box of a gamma-ray burst of the short (0.5 s), hard type (GRB 000313), with the BOOTES-1 experiment in southern Spain, starting 4 min after the gamma-ray event,…
Afterglow upper limits for four short duration, hard spectrum gamma-ray bursts
K. Hurley, E. Berger, A. Castro-Tirado +21
We present interplanetary network localization, spectral, and time history information for four short-duration, hard spectrum gamma-ray bursts, GRB000607, 001025B, 001204, and 0101…
The very red afterglow of GRB 000418 - further evidence for dust extinction in a GRB host galaxy
S. Klose, B. Stecklum, N. Masetti +36
We report near-infrared and optical follow-up observations of the afterglow of the Gamma-Ray Burst 000418 starting 2.5 days after the occurrence of the burst and extending over nea…