The extraordinarily bright optical afterglow of GRB 991208 and its host galaxy

Castro‐Tirado, A. J.; Соколов, В. В.; Gorosabel, J.; Cerón, J. M. Castro; Greiner, J.; Wijers, R. A. M. J.; Jensen, B. L.; Hjorth, J.; Toft, Sune; Pedersen, H.; Palazzi, E.; Pian, E.; Masetti, N.; Sagar, Ram; Mohan, V.; Pandey, A. K.; Pandey, S. B.; Додонов, С. Н.; Фатхуллин, Т. А.; Afanasiev, V. L.; Komarova, V. N.; Моисеев, А. В.; Hudec, R.; Šimon, V.; Vreeswijk, P. M.; Rol, E.; Klose, S.; Stecklum, B.; Osorio, M. R. Zapatero; Caon, N.; Blake, Chris; Wall, Jasper; Heinlein, D.; Henden, A. A.; Benetti, S.; Magazzù, A.; Ghinassi, F.; Tommasi, L.; Bremer, M.; Kouveliotou, C.; Guziy, S.; Shlyapnikov, A. A.; Hopp, U.; Feulner, Georg; Dreizler, S.; Hartmann, D. H.; Boehnhardt, H.; Paredes, J. M.; Martı́, Josep; Xanthopoulos, E.; Kristen, H.; Smoker, J. V.; Hurley, K.

doi:10.1051/0004-6361:20010247

Cited by 85 publications

(33 citation statements)

References 65 publications

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“…In addition, two foreground absorbing systems are detected (Bloom et al 2001;Castro et al 2001). These systems are typical for the metallic line absorbers at comparable redshifts.…”

Section: Grb 010222mentioning

confidence: 96%

“…Also, from the possible connection of GRBs with supernovae (Galama et al 1998(Galama et al , 2000Kulkarni et al 1998;Bloom et al 1999Bloom et al , 2002bReichart 1999;Castro-Tirado et al 2001;Björnsson et al 2001), we would expect that GRBs occur in dense star-forming regions; large amounts of optical extinction are then naturally expected, but only small amounts are observed (Galama & Wijers 2001).…”

Section: No 1 2003 Observations Of Grb 010222mentioning

confidence: 96%

“…Absorption lines yielded a redshift of z ¼ 1:4768AE 0:0002 (Garnavich et al 2001;Jha et al 2001;Bloom et al 2001;Castro et al 2001;Masetti et al 2001) for the highest redshift absorber. This system shows kinematic substructure, with two distinct systems at z 1 ¼ 1:47667 AE 0:00005 and z 2 ¼ 1:47755 AE 0:00005, corresponding to a rest-frame velocity separation of 106 km s À1 , typical for internal motions in galaxies .…”

Section: Grb 010222mentioning

confidence: 99%

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Hubble Space Telescopeand Ground‐based Optical and Ultraviolet Observations of GRB 010222

Galama

Reichart

Brown

et al. 2003

ApJ

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We report on Hubble Space Telescope (HST) Wide Field Planetary Camera 2 optical and Space Telescope Imaging Spectrograph (STIS) near-ultraviolet MAMA observations and ground-based optical observations of GRB 010222, spanning 15 hr to 71 days. The observations are well described by a relativistic blast wave model with a hard electron energy distribution, p ¼ 1:57 þ0:04 À0:03 , and a jet transition at t Ã ¼ 0:93 þ0:15 À0:06 days. These values are slightly larger than previously found as a result of a correction for the contribution from the host galaxy to the late-time ground-based observations and the larger temporal baseline provided by the HST observations. The host galaxy is found to contain a very compact core (size <0>25), which coincides with the position of the optical transient. The STIS near-ultraviolet MAMA observations allow for an investigation of the extinction properties along the line of sight to GRB 010222. We find that the far-ultraviolet curvature component c 4 is rather large. In combination with the low optical extinction, A V ¼ 0:110 þ0:010 À0:021 mag, when compared with the hydrogen column inferred from X-ray observations, we suggest that this is evidence for dust destruction.

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“…In addition, two foreground absorbing systems are detected (Bloom et al 2001;Castro et al 2001). These systems are typical for the metallic line absorbers at comparable redshifts.…”

Section: Grb 010222mentioning

confidence: 96%

Section: No 1 2003 Observations Of Grb 010222mentioning

confidence: 96%

Section: Grb 010222mentioning

confidence: 99%

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Hubble Space Telescopeand Ground‐based Optical and Ultraviolet Observations of GRB 010222

Galama

Reichart

Brown

et al. 2003

ApJ

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“…Earlier evidence on the GRB-SN connection was initially based on the coincidence of GRB 980425 and SN 1998bw , and subsequently some SN light contribution was found in the late-time light curves of GRB 980326 (Castro-Tirado & Gorosabel 1999;Bloom et al 1999), GRB 970228 , and GRB 970508 (Sokolov 2002), as well as possibly GRB 980703 ), GRB 990712 (Björnsson et al 2001, GRB 991208 (Castro-Tirado et al 2001), and GRB 000911 (Lazzati et al 2001).…”

Section: Introductionmentioning

confidence: 99%

GRB 011121: A Collimated Outflow into Wind‐blown Surroundings

Greiner

Klose

Salvato

et al. 2003

ApJ

Self Cite

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We report optical and near-infrared follow-up observations of GRB 011121 collected predominantly at ESO telescopes in Chile. We discover a break in the afterglow light curve after 1.3 days, which implies an initial jet opening angle of about 9 . The jet origin of this break is supported by the fact that the spectral energy distribution is achromatic during the first 4 days. During later phases, GRB 011121 shows significant excess emission above the flux predicted by a power law, which we interpret as additional light from an underlying supernova. In particular, the spectral energy distribution of the optical transient approximately 2 weeks after the burst is clearly not of power-law type but can be presented by a blackbody with a temperature of $6000 K. The deduced parameters for the decay slope and the spectral index favor a wind scenario, i.e., an outflow into a circumburst environment shaped by the stellar wind of a massive gamma-ray burst (GRB) progenitor. Because of its low redshift of z ¼ 0:36, GRB 011121 has been the best example for the GRB-supernova connection until GRB 030329 and provides compelling evidence for a circumburster wind region expected to exist if the progenitor was a massive star.

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“…Thus, X-ray flashes, which are associated to long-duration GRBs, are probably produced by the highlyrelativistic jets ejected in core-collapse supernova explosions. The relativistic fireball model (Goodman 1986;Paczyński 1986Paczyński , 1990Castro-Tirado et al 2001) provides a reasonable description of the observed afterglow spectrum, which is produced by the synchrotron emission of electrons accelerated in a relativistic shock with an estimated total energy budget roughly the same order of magnitude as that of supernovae Ib/c (Frail 2001). The discovery of the slowly fading X-ray emission, from optical and radio afterglows of GRBs and the identification of host galaxies at cosmological distances provided additional support for their progenitors being produced short-lived massive stars at different cosmological epochs, whose detection is limited by the BATSE threshold to within distances slightly larger than z ∼ 4 (Wijiers et al 1997;Blain & Natarajan 2000).…”

Section: Introductionmentioning

confidence: 99%

z= 1 multifractality of Swift short GRBs?

Tamburini

2010

A&A

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Aims. We analyze and characterize the angular distribution of selected samples of gamma ray bursts (GRBs) from BATSE and Swift data to confirm that the division into two classes of short-and long-duration GRBs also correspond to two distinct spatial populations. Methods. The angular distribution is analyzed using multifractal analysis and characterized by a multifractal spectrum of dimensions. Different spectra of dimensions relate to different angular distributions.Results. The spectra of dimensions of short and long bursts indicate that the two populations indeed have two different angular distributions. Both Swift and BATSE long bursts appear to be homogeneously distributed across the sky with a monofractal distribution. In contrast, short GRBs follow a multifractal distribution for both the two samples. Even if BATSE data do not enable a unique interpretation of their angular distribution to be made because of the instrumental selection effects that mainly favor the detection of nearby GRBs, the results from Swift short GRBs confirm this behavior, also when including GRBs corrected by the redshift factor. The distributions traced by short GRBs, up to z = 1, depict a universe with a structure similar to that of a disordered porous material with uniformly distributed heterogeneous irregular structures, appearing more clustered than expected.

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The extraordinarily bright optical afterglow of GRB 991208 and its host galaxy

Cited by 85 publications

References 65 publications

Hubble Space Telescopeand Ground‐based Optical and Ultraviolet Observations of GRB 010222

Hubble Space Telescopeand Ground‐based Optical and Ultraviolet Observations of GRB 010222

GRB 011121: A Collimated Outflow into Wind‐blown Surroundings

z= 1 multifractality of Swift short GRBs?

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