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View article: Early steep optical decay linked to reverse shock for GRB200131A
Early steep optical decay linked to reverse shock for GRB200131A Open
We observed an optical afterglow of GRB200131A obtaining the first photometric point 63 s after the satellite trigger. This early observation shows a steep decay, suggesting either internal engine activity or a reverse shock. By fitting th…
View article: The Puzzling Long GRB 191019A: Evidence for Kilonova Light
The Puzzling Long GRB 191019A: Evidence for Kilonova Light Open
GRB 191019A was a long gamma-ray burst (GRB) lasting ~65 s and, as such, originally thought to be linked to a core-collapse supernova. However, even though follow-up observations identified the optical counterpart close to the bright nucle…
View article: Early steep optical decay linked to reverse shock for GRB200131A
Early steep optical decay linked to reverse shock for GRB200131A Open
We observed an optical afterglow of GRB 200131A obtaining the first photometric point 63 s after the satellite trigger. This early observation shows a steep decay, suggesting either internal engine activity or a reverse shock. By fitting t…
View article: Fires in the deep: The luminosity distribution of early-time gamma-ray-burst afterglows in light of the Gamow Explorer sensitivity requirements
Fires in the deep: The luminosity distribution of early-time gamma-ray-burst afterglows in light of the Gamow Explorer sensitivity requirements Open
\nContext. Gamma-ray bursts (GRBs) are ideal probes of the Universe at high redshift (ɀ), pinpointing the locations of the earliest star-forming galaxies and providing bright backlights with simple featureless power-law spectra that can be…
View article: Fires in the deep: The luminosity distribution of early-time gamma-ray-burst afterglows in light of the Gamow Explorer sensitivity requirements
Fires in the deep: The luminosity distribution of early-time gamma-ray-burst afterglows in light of the Gamow Explorer sensitivity requirements Open
Context . Gamma-ray bursts (GRBs) are ideal probes of the Universe at high redshift (ɀ), pinpointing the locations of the earliest star-forming galaxies and providing bright backlights with simple featureless power-law spectra that can be …
View article: Highly luminous supernovae associated with gamma-ray bursts
Highly luminous supernovae associated with gamma-ray bursts Open
Context. The supernovae (SNe) associated with gamma-ray bursts (GRBs) are generally seen as a homogeneous population, but at least one exception exists: the highly luminous SN 2011kl associated with the ultra-long GRB 111209A. Such outlier…
View article: Optical and Near-infrared Observations of the Distant but Bright “New Year’s Burst” GRB 220101A
Optical and Near-infrared Observations of the Distant but Bright “New Year’s Burst” GRB 220101A Open
High-redshift gamma-ray bursts (GRBs) are useful to probe the early Universe, but only a few candidates have been detected so far. Here, we report the optical and near-infrared observations of the afterglow of a relatively high-redshift ev…
View article: A blast from the infant Universe: The very high-<i>z</i>GRB 210905A
A blast from the infant Universe: The very high-<i>z</i>GRB 210905A Open
We present a detailed follow-up of the very energetic GRB 210905A at a high redshift of z = 6.312 and its luminous X-ray and optical afterglow. Following the detection by Swift and Konus- Wind , we obtained a photometric and spectroscopic …
View article: The Peculiar Short-duration GRB 200826A and Its Supernova*
The Peculiar Short-duration GRB 200826A and Its Supernova* Open
Gamma-ray bursts (GRBs) are classified into long and short events. Long GRBs (LGRBs) are associated with the end states of very massive stars, while short GRBs (SGRBs) are linked to the merger of compact objects. GRB 200826A was a peculiar…
View article: SkyHopper mission science case I: Identification of high redshift Gamma-Ray Bursts through space-based near-infrared afterglow observations
SkyHopper mission science case I: Identification of high redshift Gamma-Ray Bursts through space-based near-infrared afterglow observations Open
Long-duration gamma-ray burst (GRB) afterglow observations offer cutting-edge opportunities to characterise the star formation history of the Universe back to the epoch of reionisation, and to measure the chemical composition of interstell…
View article: Technical layout and fabrication of a compact all-glass four-channel beam splitter based on a Kösters design
Technical layout and fabrication of a compact all-glass four-channel beam splitter based on a Kösters design Open
We report on the design and fabrication of a novel all-glass four-channel beam splitter based on a Kösters prism for use in space. The Kösters prism, which consists of three pairs of individual prisms, is used to separate an incoming teles…
View article: SkyHopper mission science case I: Identification of high redshift Gamma-Ray Bursts through space-based near-infrared afterglow observations
SkyHopper mission science case I: Identification of high redshift Gamma-Ray Bursts through space-based near-infrared afterglow observations Open
Long-duration gamma-ray burst (GRB) afterglow observations offer cutting-edge opportunities to characterise the star formation history of the Universe back to the epoch of reionisation, and to measure the chemical composition of interstell…
View article: VLT/MUSE and ATCA observations of the host galaxy of the short GRB 080905A at z=0.122
VLT/MUSE and ATCA observations of the host galaxy of the short GRB 080905A at z=0.122 Open
Short-GRB progenitors could come in various flavors, depending on the nature of the merging compact stellar objects (including a stellar-mass black hole or not) or depending on their ages (millions or billions of years). At a redshift of z…
View article: VLT/MUSE and ATCA Observations of the Host Galaxy of the Short GRB 080905A at z = 0.122
VLT/MUSE and ATCA Observations of the Host Galaxy of the Short GRB 080905A at z = 0.122 Open
Short-GRB progenitors could come in various flavors, depending on the nature of the merging compact stellar objects (including a stellar-mass black hole or not) or depending on their ages (millions or billions of years). At a redshift of z…
View article: Highly luminous supernovae associated with gamma-ray bursts II. The luminous blue bump in the afterglow of GRB 140506A
Highly luminous supernovae associated with gamma-ray bursts II. The luminous blue bump in the afterglow of GRB 140506A Open
The supernovae (SNe) associated with gamma-ray bursts (GRBs) are generally seen as a homogenous population, but at least one exception exists, both in terms of luminosity as well as Spectral Energy Distribution (SED). However, this event, …
View article: The Rapidly Flaring Afterglow of the Very Bright and Energetic GRB 070125
The Rapidly Flaring Afterglow of the Very Bright and Energetic GRB 070125 Open
We report on multi-wavelength observations, ranging from the X-ray to radio wave bands, of the IPN-localized gamma-ray burst GRB 070125. Spectroscopic observations reveal the presence of absorption lines due to O I, Si II, and C IV, implyi…
View article: THE HIGHLY ENERGETIC EXPANSION OF SN 2010bh ASSOCIATED WITH GRB 100316D
THE HIGHLY ENERGETIC EXPANSION OF SN 2010bh ASSOCIATED WITH GRB 100316D Open
We present the spectroscopic and photometric evolution of the nearby (z = 0.059) spectroscopically confirmed Type Ic supernova, SN 2010bh, associated with the soft, long-duration gamma-ray burst (X ...
View article: The host galaxy of the short GRB 050709
The host galaxy of the short GRB 050709 Open
The host of the short gamma-ray burst (GRB) 050709 is a morphologically disturbed low-luminous galaxy. At a redshift of z = 0.16, it belongs to one of the cosmologically nearest short-GRB hosts identified to date. Consequently, it represen…
View article: Infrared observations of the flaring maser source G358.93-0.03 -- SOFIA\n confirms an accretion burst from a massive young stellar object
Infrared observations of the flaring maser source G358.93-0.03 -- SOFIA\n confirms an accretion burst from a massive young stellar object Open
Class II methanol masers are signs of massive young stellar objects (MYSOs).\nRecent findings show that MYSO accretion bursts cause flares of these masers.\nThus, maser monitoring can be used to identify such bursts. Burst-induced SED\ncha…
View article: Infrared observations of the flaring maser source G358.93−0.03
Infrared observations of the flaring maser source G358.93−0.03 Open
Context. Class II methanol masers are signposts of massive young stellar objects (MYSOs). Recent evidence shows that flares of these masers are driven by MYSO accretion bursts. Thus, maser monitoring can be used to identify such bursts whi…
View article: Infrared observations of the flaring maser source G358.93-0.03 -- SOFIA confirms an accretion burst from a massive young stellar object
Infrared observations of the flaring maser source G358.93-0.03 -- SOFIA confirms an accretion burst from a massive young stellar object Open
Class II methanol masers are signs of massive young stellar objects (MYSOs). Recent findings show that MYSO accretion bursts cause flares of these masers. Thus, maser monitoring can be used to identify such bursts. Burst-induced SED change…
View article: Deep ATCA and VLA Radio Observations of Short-GRB Host Galaxies. Constraints on Star Formation Rates, Afterglow Flux, and Kilonova Radio Flares
Deep ATCA and VLA Radio Observations of Short-GRB Host Galaxies. Constraints on Star Formation Rates, Afterglow Flux, and Kilonova Radio Flares Open
We report the results of an extensive radio-continuum observing campaign of host galaxies of short gamma-ray bursts (GRBs). The goal of this survey was to search for optically obscured star formation, possibly indicative of a population of…
View article: Highly luminous supernovae associated with gamma-ray bursts
Highly luminous supernovae associated with gamma-ray bursts Open
Context . GRB 111209A, one of the longest gamma-ray bursts (GRBs) ever observed, is linked to SN 2011kl, which is the most luminous GRB supernova (SN) detected so far. Several lines of evidence indicate that this GRB-SN is powered by a mag…
View article: A multiwavelength analysis of a collection of short-duration GRBs observed between 2012 and 2015
A multiwavelength analysis of a collection of short-duration GRBs observed between 2012 and 2015 Open
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 multiwavelength facilities including the Gran Canarias Tel…
View article: The Properties of GRB 120923A at a Spectroscopic Redshift of z ≈ 7.8
The Properties of GRB 120923A at a Spectroscopic Redshift of z ≈ 7.8 Open
Gamma-ray bursts (GRBs) are powerful probes of early stars and galaxies, during and potentially even before the era of reionization. Although the number of GRBs identified at z ≳ 6 remains small, they provide a unique window on typical sta…
View article: Large-amplitude late-time radio variability in GRB 151027B
Large-amplitude late-time radio variability in GRB 151027B Open
\nContext. Deriving physical parameters from gamma-ray burst (GRB) afterglow observations remains a challenge, even 20 years after the discovery of afterglows. The main reason for the lack of progress is that the peak of the synchrotron em…
View article: The optical/NIR afterglow of GRB 111209A: Complex yet not unprecedented
The optical/NIR afterglow of GRB 111209A: Complex yet not unprecedented Open
Context . 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 detected, also has the best-monitored afterglow in th…