303 citations · 2k across the 37 of their papers we have counts for
37 papers
The GROND gamma-ray burst sample. I. Overview and statistics
J. Greiner, T. Krühler, J. Bolmer +17
A dedicated gamma-ray burst (GRB) afterglow observing program was performed between 2007 and 2016 with GROND, a seven-channel optical and near-infrared imager at the 2.2m telescope…
Relativistic supernova 2009bb exploded close to an atomic gas cloud
Michał J. Michałowski, G. Gentile, T. Kruhler +19
The potential similarity of the powering mechanisms of relativistic SNe and GRBs allowed us to make a prediction that relativistic SNe are born in environments similar to those of…
The Optical/NIR afterglow of GRB 111209A: Complex yet not Unprecedented
D. A. Kann, P. Schady, F. Olivares E. +24
Afterglows of Gamma-Ray Bursts (GRBs) are simple in the most basic model, but can show many complex features. The ultra-long duration GRB 111209A, one of the longest GRBs ever dete…
Probing dust-obscured star formation in the most massive Gamma-Ray Burst host galaxies
Jochen Greiner, Michal J. Michalowski, Sylvio Klose +15
Due to their relation to massive stars, long-duration gamma-ray bursts (GRBs) allow pinpointing star formation in galaxies independently of redshift, dust obscuration, or galaxy ma…
Highly Luminous Supernovae associated with Gamma-Ray Bursts I.: GRB 111209A/SN 2011kl in the Context of Stripped-Envelope and Superluminous Supernovae
D. A. Kann, P. Schady, F. E. Olivares +22
GRB 111209A, one of the longest Gamma-Ray Bursts (GRBs) ever observed, is linked to SN 2011kl, the most luminous GRB-Supernova (SN) detected so far, which shows evidence for being…
Is the cluster environment quenching the Seyfert activity in elliptical and spiral galaxies?
R. S. de Souza, M. L. L. Dantas, A. Krone-Martins +7
We developed a hierarchical Bayesian model (HBM) to investigate how the presence of Seyfert activity relates to their environment, herein represented by the galaxy cluster mass, $M…
A very luminous magnetar-powered supernova associated with an ultra-long gamma-ray burst
Jochen Greiner, Paolo A. Mazzali, D. Alexander Kann +29
A new class of ultra-long duration (>10,000 s) gamma-ray bursts has recently been suggested. They may originate in the explosion of stars with much larger radii than normal long ga…
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.…
Using gamma regression for photometric redshifts of survey galaxies
J. Elliott, R. S. de Souza, A. Krone-Martins +3
Machine learning techniques offer a plethora of opportunities in tackling big data within the astronomical community. We present the set of Generalized Linear Models as a fast alte…
Super-solar metallicity at the position of the ultra-long GRB130925A
P. Schady, T. Kruehler, J. Greiner +17
Over the last decade there has been immense progress in the follow-up of short and long GRBs, resulting in a significant rise in the detection rate of X-ray and optical afterglows,…
Microphysics and dynamics of the Gamma-Ray Burst 121024A
K. Varela, H. van Eerten, J. Greiner +28
Aims. The aim of the study is to constrain the physics of gamma-ray bursts (GRBs) by analysing the multi-wavelength afterglow data set of GRB 121024A that covers the full range fro…
Gamma-Ray Bursts Trace UV Metrics of Star Formation over 3 < z < 5
Jochen Greiner, Derek B. Fox, Patricia Schady +15
We present the first uniform treatment of long duration gamma-ray burst (GRB) host galaxy detections and upper limits over the redshift range 3<z<5, a key epoch for observational a…
Multiwavelength analysis of three SNe associated with GRBs observed by GROND
F. Olivares E., J. Greiner, P. Schady +14
After the discovery of the first connection between GRBs and SNe almost two decades ago, tens of SN-like rebrightenings have been discovered and about seven solid associations have…
Circular polarization in the optical afterglow of GRB 121024A
K. Wiersema, S. Covino, K. Toma +37
Gamma-ray bursts (GRBs) are most probably powered by collimated relativistic outflows (jets) from accreting black holes at cosmological distances. Bright afterglows are produced wh…
The Overlooked Potential of Generalized Linear Models in Astronomy-II: Gamma regression and photometric redshifts
J. Elliott, R. S. de Souza, A. Krone-Martins +3
Machine learning techniques offer a precious tool box for use within astronomy to solve problems involving so-called big data. They provide a means to make accurate predictions abo…
The warm, the excited, and the molecular gas: GRB 121024A shining through its star-forming galaxy
M. Friis, A. De Cia, T. Krühler +28
We present the first reported case of the simultaneous metallicity determination of a gamma-ray burst (GRB) host galaxy, from both afterglow absorption lines as well as strong emis…
A quiescent galaxy at the position of the long GRB 050219A
A. Rossi, S. Piranomonte, S. Savaglio +25
Long-duration gamma-ray bursts (LGRBs) are produced by the collapse of very massive stars. Due to the short lifetime of their progenitors, LGRBs pinpoint star-forming galaxies. We…
The First Billion Years project: gamma-ray bursts at z>5
J. Elliott, S. Khochfar, J. Greiner +1
Long gamma-ray burst's (LGRB's) association to the death of massive stars suggest they could be used to probe the cosmic star formation history (CSFH) with high accuracy, due to th…
Supernova 2010as: the Lowest-Velocity Member of a Family of Flat-Velocity Type IIb Supernovae
Gastón Folatelli, Melina C. Bersten, Hanindyo Kuncarayakti +23
We present extensive optical and near-infrared photometric and spectroscopic observations of the stripped-envelope (SE) supernova SN 2010as. Spectroscopic peculiarities, such as in…
GROND coverage of the main peak of Gamma-Ray Burst 130925A
J. Greiner, H. -F. Yu, T. Krühler +23
Prompt or early optical emission in gamma-ray bursts is notoriously difficult to measure, and observations of the dozen cases show a large variety of properties. Yet, such early em…
GRB 120711A: an intense INTEGRAL burst with long-lasting soft gamma-ray emission and a powerful optical flash
A. Martin-Carrillo, L. Hanlon, M. Topinka +20
A long and intense gamma-ray burst (GRB) was detected by INTEGRAL on July 11 2012 with a duration of ~115s and fluence of 2.8x10^-4 erg cm^-2 in the 20 keV-8 MeV energy range. GRB…
Simultaneous optical/gamma-ray observations of GRB 121217's prompt emission
J. Elliott, H. -F. Yu, S. Schmidl +20
Since the advent of the Swift satellite it has been possible to obtain precise localisations of GRB positions of sub-arcsec accuracy within seconds, facilitating ground-based robot…
Prompt emission of GRB 121217A from gamma-rays to the NIR
J. Elliott, H. -F. Yu, S. Schmidl +20
The mechanism that causes the prompt-emission episode of gamma-ray bursts (GRBs) is still widely debated despite there being thousands of prompt detections. The favoured internal s…
Afterglow rebrightenings as a signature of a long-lasting central engine activity? The emblematic case of GRB 100814A
M. Nardini, J. Elliott, R. Filgas +12
In the past few years the number of well-sampled optical to NIR light curves of long Gamma-Ray Bursts (GRBs) has greatly increased particularly due to simultaneous multi-band image…