The Benefit of Simultaneous Seven-filter Imaging: 10 Years of GROND Observations

Greiner, J.

doi:10.1088/1538-3873/aaec5d

Cited by 7 publications

(7 citation statements)

References 169 publications

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“…We obtained multi-band photometric observations with the Gamma-Ray burst Optical and Near-infrared Detector (GROND) (Greiner et al 2008;Greiner 2019) mounted on the 2.2 m MPG telescope at ESO La Silla observatory (originally published in Yates et al 2016) in the 𝑔 𝑟 𝑖 𝑧 𝐽𝐻𝐾 bands. GROND observations began about half an hour after the GRB, at very high airmass (2.7).…”

Section: Grond Observationsmentioning

confidence: 99%

GRB 160410A: the first Chemical Study of the Interstellar Medium of a Short GRB

Fernández,

Thöne,

Kann

et al. 2021

Preprint

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Short Gamma-Ray Bursts (SGRBs) are produced by the coalescence of compact binary systems which are remnants of massive stars. GRB 160410A is classified as a short-duration GRB with extended emission and is currently the farthest SGRB with a redshift determined from an afterglow spectrum and also one of the brightest SGRBs to date. The fast reaction to the Neil Gehrels Swift Observatory alert allowed us to obtain a spectrum of the afterglow using the X-shooter spectrograph at the Very Large Telescope (VLT). The spectrum shows a number of absorption features at a redshift of 𝑧 = 1.7177, in addition, we detect two intervening systems at 𝑧 = 1.581 and 𝑧 = 1.444. The spectrum shows Ly𝛼 in absorption with a column density of log N(HI) = 21.3 ± 0.3 cm −2 which, together with Fe , C , Si and O , allow us to perform the first study of chemical abundances in a SGRB host galaxy. We determine a metallicity of [Fe/H] = −2.7 ± 0.3, significantly lower than observed for any long GRB host. We find no evidence for extinction in the afterglow spectral energy distribution (SED). The environment has a low degree of ionisation and the C and Si lines are completely absent. We do not detect an underlying host galaxy down to deep limits. Additionally, we present the spectrum of GRB 201221D, another high-𝑧 short GRB that shows absorption lines at 𝑧 = 1.045 but whose environment seems to be more similar to the one of short GRBs as derived from the SED fitting to the host photometry.

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Section: Grond Observationsmentioning

confidence: 99%

GRB 160410A: the first Chemical Study of the Interstellar Medium of a Short GRB

Fernández,

Thöne,

Kann

et al. 2021

Preprint

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“…Since a typical GRB afterglow rapidly fades by about 2-3 mag within 5-10 min after its onset and by another 3 mag in the following 50 min [151], quick GRB follow-ups are extremely important. The low latency and cost and high reliability and efficiency of the observations with robotic telescopes are provided by computer-controlled low-level behavior, ensuring the absence of manual control by humans.…”

Section: Global Network Of Robotic Telescopes/rapid Follow-upmentioning

confidence: 99%

“…Installed at the 2.2 m f /8 Ritchey-Chretien telescope on an equatorial fork mount in La Silla (Chile), the Gamma-Ray Burst Optical Near-IR Detector (GROND) performs imaging in the Sloan g r i z filters and NIR JHK bands with a 0.4 intrinsic image quality in a 5.4 × 5.4 FoV in each visual band and a 10 × 10 FoV in the NIR (2048 × 2048 CCD with the 0.158 /pixel plate scale) using a focal reducer (1024 × 1024 array with a plate scale of 0.60 /pixel) with a 0.6 FWHM, allowing the linear increase of sensitivity with additional exposure up to 3-4 h [151,247].…”

Section: Grondmentioning

confidence: 99%

“…The primary goal of GROND is a rapid follow-up of GRB afterglows and estimation of their redshifts. The main scientific highlights include the start of systematic GRB afterglow follow-up in the near-infrared (JHKs) band, enabling the discovery of high-redshift GRBs, studying the abundance of dust along the GRB line-of-sight, i.e., assessment of the "dark burst" incidence, measurements of GRB afterglow SEDs, studies of the GRB-SNe connection, observations of the black widow binaries, and blazar redshift estimates [151].…”

Section: Grondmentioning

confidence: 99%

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Key Space and Ground Facilities in GRB Science

et al. 2022

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Gamma-ray bursts (GRBs) are short and intense flashes of γ-rays coming from deep space. GRBs were discovered more than a half century ago and now are observed across the whole electromagnetic spectrum from radio to very-high-energy gamma rays. They carry information about the powerful energy release during the final stage of stellar evolution, as well as properties of matter on the way to the observer. At present, space-based observatories detect on average approximately one GRB per day. In this review, we summarize key space and ground facilities that contribute to the GRB studies.

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“…Other scientific highlights include (iii) studies of Fermi-detected GRBs [112] (including the redshift estimate of GRB 080916C), (iv) measurements of the SEDs of non-canonical light curve variability such as flares or intensity jumps, (v) the discovery and detailed study of a large fraction of all GRB-SNe, most prominently the SN 2011kl related to the ultra-long GRB 111209A [62], (vi) tests of the simplest fireball scenario based on the evolution of afterglow SEDs, (vii) the investigation of the jet structure and/or off-axis viewing geometry based on achromatic afterglow light curves, and (viii) the characterisation of about half of all optically detected short GRB afterglows [117]. An overview on non-GRB science with GROND is given in Greiner [53]. Over the years, 26 PhD and Master theses were written using GROND data.…”

Section: Grb Afterglow Studies With Grondmentioning

confidence: 99%

Half-a-century of gamma-ray astrophysics at the Max-Planck Institute for Extraterrestrial Physics

Schönfelder

Greiner

2021

EPJ H

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Gamma-ray astronomy has been one of the prime scientific research fields of the Max-Planck Institute for Extraterrestrial Physics (MPE) from its beginning. Over the years, the entire gamma-ray energy range accessible from space was explored. The purpose of this review article is to summarise the achievements of the gamma-ray group at MPE during the last 50+ years. This covers a substantial part of the general history of space-based gamma-ray astronomy, for which both, general review articles (e.g. Pinkau in Exp Astron 5: 157, 2009; Schönfelder in AN 323: 524, 2002; Trimble in AIP Conf Proc 304: 40, 1994) and a detailed tabular list of events and missions (Leonard and Gehrels in https://heasarc.gsfc.nasa.gov/docs/history, version 1.0.8, 2009), have been compiled. Here, we describe the gamma-ray activities at MPE from the beginning till the present, reviewing the tight interplay between new technological developments towards new instruments and scientific progress in understanding gamma-ray sources in the sky. This covers (i) the early development of instruments and their tests on half a dozen balloon flights, (ii) the involvement in the most important space missions at the time, i.e. ESA’s COS-B satellite, NASA’s Compton Gamma-ray Observatory and Fermi Space Telescope, as well as ESA’s INTEGRAL observatory, (iii) the participation in several other missions such as TD-1, Solar Maximum Mission, or Ulysses, and (iv) the complementary ground-based optical instruments OPTIMA and GROND to enhance selected science topics (pulsars, gamma-ray bursts). With the gradual running-out of institutional support since 2010, gamma-ray astrophysics as a main research field has now come to an end at MPE.

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The Benefit of Simultaneous Seven-filter Imaging: 10 Years of GROND Observations

Cited by 7 publications

References 169 publications

GRB 160410A: the first Chemical Study of the Interstellar Medium of a Short GRB

GRB 160410A: the first Chemical Study of the Interstellar Medium of a Short GRB

Key Space and Ground Facilities in GRB Science

Half-a-century of gamma-ray astrophysics at the Max-Planck Institute for Extraterrestrial Physics

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