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Long-duration gamma-ray bursts (GRBs) are indisputably related to star formation, and their vast luminosity in gamma rays pin-points regions of star formation independent of galaxy mass. As such, GRBs provide a unique tool for studying star…

We present the first spatially resolved study of molecular gas in the vicinity of a Gamma Ray Burst, using CO(2-1) emission line observations with the Atacama Large Millimetre Array (ALMA) at ~50 pc scales. The host galaxy of GRB 980425…

We present observations and analysis of the host galaxies of 23 heavily dust-obscured gamma-ray bursts (GRBs) observed by the Swift satellite during the years 2005-2009, representing all GRBs with an unambiguous host-frame extinction of…

We present a characterization of the close environment of GRB980425 based on 5-160mic spectro-imaging obtained with Spitzer. The Gamma-Ray Burst GRB980425 occurred in a nearby (z=0.0085) SBc-type dwarf galaxy, at a projected distance of…

Cosmology and Nongalactic Astrophysics · Physics 2019-08-19 E. Le Floc'h , V. Charmandaris , K. Gordon , W. J. Forrest , B. Brandl , D. Schaerer , M. Dessauges-Zavadsky , L. Armus

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 mass/size, thus providing a unique tool to investigate the…

We present the results of the 16-cm-waveband continuum observations of four host galaxies of gamma-ray bursts (GRBs) 990705, 021211, 041006, and 051022 using the Australia Telescope Compact Array. Radio emission was not detected in any of…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-03 Bunyo Hatsukade , Tetsuya Hashimoto , Kouji Ohta , Kouichiro Nakanishi , Yoichi Tamura , Kotaro Kohno

We present the first comprehensive search for submillimeter and radio emission from the host galaxies of twenty well-localized gamma-ray bursts (GRBs). With the exception of a single source, all observations were undertaken months to years…

Astrophysics · Physics 2009-11-07 E. Berger , L. L. Cowie , S. R. Kulkarni , D. A. Frail , H. Aussel , A. J. Barger

It is not clear whether gamma-ray bursts (GRBs) are unbiased tracers of cosmic star formation at $z > 2$. Since dusty starburst galaxies are significant contributors to the cosmic star formation at these redshifts, they should form a major…

Astrophysics of Galaxies · Physics 2020-10-22 Pradip Gatkine , Stuart Vogel , Sylvain Veilleux

We present an analysis of the photometry and spectroscopy of the host galaxy of Swift-detected GRB 080517. From our optical spectroscopy, we identify a redshift of z = 0.089 +/- 0.003, based on strong emission lines, making this a rare…

Astrophysics of Galaxies · Physics 2015-06-22 E. R. Stanway , A. J. Levan , N. R. Tanvir , K. Wiersema , A. van der Horst , C. G. Mundell , C. Guidorzi

The collapsar model predicts that the progenitors of Gamma-ray Bursts (GRBs) are metal poor in Fe group elements. The existence of low metallicity stellar populations could manifest itself through special characteristics of the immediate…

Astrophysics · Physics 2008-10-21 L. Christensen , P. M. Vreeswijk , J. Sollerman , C. C. Thoene , E. Le Floc'h , K. Wiersema

We present spectroscopic observations of the host galaxy of the gamma-ray burst (GRB) 980703. Several emission and absorption features are detected, making the redshift, z = 0.966, completely unambiguous. This is only the third known…

Astrophysics · Physics 2011-03-17 S. G. Djorgovski , S. R. Kulkarni , J. S. Bloom , R. Goodrich , D. A. Frail , L. Piro , E. Palazzi

In this work we present the first results of our imaging campaign at Keck Observatory to identify the host galaxies of "dark" gamma-ray bursts (GRBs), events with no detected optical afterglow or with detected optical flux significantly…

We report the discovery of the host galaxy of dark burst GRB080607 at z_GRB=3.036. GRB080607 is a unique case of a highly extinguished (A_V~3 mag) afterglow that was yet sufficiently bright for high-quality absorption-line spectroscopy. The…

We present an analysis of the spectral energy distribution (SED) of the galaxy ESO 184-G82, the host of the closest known long gamma-ray burst (GRB) 980425 and its associated supernova (SN) 1998bw. We use our observations obtained at the…

We present deep HST/STIS and ground-based photometry of the host galaxy of the gamma-ray burst GRB 980703 taken 17, 551, 710, and 716 days after the burst. We find that the host is a blue, slightly over-luminous galaxy with V_gal = 23.00…

We report on IRAC-4.5mic, IRAC-8.0mic and MIPS-24mic deep observations of 16 Gamma-Ray Burst (GRBs) host galaxies performed with the Spitzer Space Telescope, and we investigate in the thermal infrared the presence of evolved stellar…

Astrophysics · Physics 2009-11-11 E. Le Floc'h , V. Charmandaris , W. J. Forrest , F. Mirabel , L. Armus , D. Devost

In this article, we present multi-band photometric observations and analysis of the host galaxies for a sample of five interesting gamma-ray bursts (GRBs) observed using the 3.6m Devasthal Optical Telescope (DOT) and the back-end…

Long duration gamma-ray bursts (GRBs) allow us to explore the distant Universe, and are potentially the most effective tracer of the most distant objects. Our current knowledge of the properties of GRB host galaxies at redshifts >5 is very…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-04 S. Basa , J. G. Cuby , S. Savaglio , S. Boissier , B. Clement , H. Flores , D. Le Borgne , A. Mazure

We discuss how gamma-ray burst (GRB) optical afterglows and multiwavelength observations of their host galaxies can be used to obtain information about the relative amounts of star formation happening in optical and submillimetre galaxies.…

Astrophysics · Physics 2009-11-07 Neil Trentham , Enrico Ramirez-Ruiz , A. W. Blain

Using a sample of gamma-ray burst (GRB) afterglows detected by both the X-Ray and the UV/Optical Telescopes (XRT and UVOT) on Swift, we modelled the spectral energy distributions (SEDs) to determine gas column densities and dust extinction…

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