Host galaxies of gamma-ray bursts: Spectral energy distributions and internal extinction

Соколов, В. В.; Фатхуллин, Т. А.; Castro‐Tirado, A. J.; Fruchter, A. S.; Komarova, V. N.; Kasimova, E. R.; Додонов, С. Н.; Afanasiev, V. L.; Моисеев, А. В.

doi:10.1051/0004-6361:20010512

Cited by 89 publications

(111 citation statements)

References 40 publications

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“…Since the discovery of a nearby Type Ic supernova (SN 1998bw) in the error circle of the X-ray afterglow for GRB 980425 (Galama et al 1998;Kulkarni et al 1998), evidence is accumulating that core-collapse supernovae are physically related to long-duration GRBs. The supernova picture is further supported by the observation that all GRB hosts are starforming and in some cases even star-bursting galaxies (e.g., Frail et al 2002;Sokolov et al 2001). Evidence for host extinction by cosmic dust in GRB afterglows (e.g., Castro-Tirado et al 1999;Klose et al 2000) and the discovery of an ensemble of optically ''dark bursts'' (for a recent discussion, see Fynbo et al 2001;Klose et al 2003;Lazzati et al 2002) also are consistent with the picture that GRB progenitors are young, massive stars (Groot et al 1998;Paczyński 1998).…”

Section: Introductionmentioning

confidence: 85%

A Systematic Analysis of Supernova Light in Gamma‐Ray Burst Afterglows

Zeh

Klose

Hartmann

2004

ApJ

184

242

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We systematically reanalyzed all gamma-ray burst (GRB) afterglow data published through the end of 2002 in an attempt to detect the predicted supernova light component and to gain statistical insight into its phenomenological properties. We fit the observed photometric light curves as the sum of an afterglow, an underlying host galaxy, and a supernova component. The latter is modeled using published multicolor light curves of SN 1998bw as a template. The total sample of afterglows with established redshifts contains 21 bursts (GRB 970228-GRB 021211). For nine of these GRBs a weak supernova excess (scaled to SN 1998bw) was found, which is what makes this one of the first samples of high-z core-collapse supernovae. Among this sample are all bursts with redshifts less than $0.7. These results strongly support the notion that in fact all afterglows of longduration GRBs contain light from an associated supernova. A statistics of the physical parameters of these GRBsupernovae shows that SN 1998bw was at the bright end of its class, while it was not special with respect to its light-curve shape. Finally, we have searched for a potential correlation of the supernova luminosities with the properties of the corresponding bursts and optical afterglows, but we have not found such a relation.

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Section: Introductionmentioning

confidence: 85%

A Systematic Analysis of Supernova Light in Gamma‐Ray Burst Afterglows

Zeh

Klose

Hartmann

2004

ApJ

184

242

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“…Dust within GRB host galaxies (either in the circumburst environment or along the line of sight) is a source of extinction for optical/NIR afterglows (Klose et al 2000;Sokolov et al 2001;Djorgovski et al 2001b) that must be accounted for in modeling the optical spectrum. The frequency dependence of the extinction curve is uncertain, since we know little about the ISM properties of the GRB 980329 host galaxy.…”

Section: Afterglow Modelmentioning

confidence: 99%

The Broadband Afterglow of GRB 980329

Yost¹,

Frail²,

Harrison³

et al. 2002

ApJ

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We present radio observations of the afterglow of the bright -ray burst GRB 980329 made between 1 month and several years after the burst, a reanalysis of previously published submillimeter data, and latetime optical and near-infrared (NIR) observations of the host galaxy. From the absence of a spectral break in the optical/NIR colors of the host galaxy, we exclude the earlier suggestion that GRB 980329 lies at a redshift of ze5. We combine our data with the numerous multiwavelength observations of the early afterglow, fit a comprehensive afterglow model to the entire broadband data set, and derive fundamental physical parameters of the blast wave and its host environment. Models for which the ejecta expand isotropically require both a high circumburst density and extreme radiative losses from the shock. No low-density model (n5 10 cm À3 ) fits the data. A burst with a total energy of $10 51 ergs, with the ejecta narrowly collimated to an opening angle of a few degrees, driven into a surrounding medium with density of $20 cm À3 , provides a satisfactory fit to the light curves over a range of redshifts.

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“…Optically selected GRB host galaxies are typically found to be blue with little evidence of dust extinction (Le Floc'h et al 2003;Christensen et al 2004;Fruchter et al 2006;Savaglio et al 2009, although see Sokolov et al 2001 andCastro Cerón et al 2010;). Similarly, for most GRBs with well-observed afterglow SEDs, the amount of host galaxy extinction along the line-of-sight is also small (total V-band or visual extinction A V < 0.3) (e.g.…”

Section: Introductionmentioning

confidence: 99%

The dust extinction curves of gamma-ray burst host galaxies

Schady¹,

Dwelly²,

Page³

et al. 2011

A&A

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The composition and amount of interstellar dust within gamma-ray burst (GRB) host galaxies is of key importance when addressing selection effects in the GRB redshift distribution, and when studying the properties of their host galaxies. As well as the implications for GRB research, probing the dust within the high-z hosts of GRBs also contributes to our understanding of the conditions of the interstellar medium and star-formation in the distant Universe. Nevertheless, the physical properties of dust within GRB host galaxies continues to be a highly contended issue. In this paper we explore the mean extinction properties of dust within the host galaxies of a sample of 17 GRBs with total host galaxy visual extinction A V < 1 ( A V = 0.4), covering a redshift range z = 0.7−3.1. We find the average host extinction curve to have an ultraviolet slope comparable to that of the LMC, but with little evidence of a 2175 Å dust extinction feature as observed along Milky Way and LMC sightlines. We cannot at present rule out the presence of a 2175 Å feature, and both the standard SMC and LMC extinction curves also provide good fits to our data. However, we can reject an extinction curve that has a UV slope as flat as the mean Milky Way extinction curve, whilst also having a 2175 Å feature as prominent as seen in the mean Milky Way extinction curve. This is in contrast to the clear detection of a 2175 Å bump and the flatter extinction curves of some more heavily extinguished GRBs (A V > 1), which may be indicative of there being a dependence between dust abundance and the wavelength dependence of dust extinction, as has been previously speculated.

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Host galaxies of gamma-ray bursts: Spectral energy distributions and internal extinction

Cited by 89 publications

References 40 publications

A Systematic Analysis of Supernova Light in Gamma‐Ray Burst Afterglows

A Systematic Analysis of Supernova Light in Gamma‐Ray Burst Afterglows

The Broadband Afterglow of GRB 980329

The dust extinction curves of gamma-ray burst host galaxies

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