Photometry and spectroscopy of GRB 060526: a detailed study of the afterglow and host galaxy of a z = 3.2 gamma-ray burst

Aims. With this paper we want to investigate the highly variable afterglow light curve and environment of gamma-ray burst (GRB) 060526 atz = 3.221.Methods. We present one of the largest photometric datasets ever obtained for a GRB afterglow, consisting of multi-color photometric data fromthe ultravi...

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Main Authors:	Thone, C., Kann, D., Johannesson, G., Selj, J., Jaunsen, A., Fynbo, J., Akerlof, C., Baliyan, K., Bartolini, C., Bikmaev, I., Bloom, J., Burenin, R., Cobb, B., Covino, S., Curran, Peter, Dahle, H., Ferrero, A., Foley, S., French, J., Fruchter, A., Ganesh, S., Graham, J., Greco, G., Guarnieri, A., Hanlon, L., Hjorth, J., Ibrahimov, M., Israel, G., Jakobsson, P., Jelinek, M., Jensen, B., Jorgensen, U., Khamitov, I., Koch, T., Levan, A., Malesani, D., Masetti, N., Meehan, S., Melady, G., Nanni, D., Näränen, J., Pakstiene, E., Pavlinsky, M., Perley, D., Piccioni, A., Pizzichini, G., Pozanenko, A., Roming, P., Rujopakarn, W., Rumyantsev, V., Rykoff, E., Sharapov, D., Starr, D., Sunyaev, R., Swan, H., Tanvir, N., Terra, F., de Ugarte Postigo, A., Vreeswijk, P., Wilson, A., Yost, S., Yuan, F.
Format:	Journal Article
Published:	EDP Sciences 2010
Subjects:	galaxies: high-redshift gamma rays bursts: individual: GRB 060526 ISM: abundances
Online Access:	http://www.aanda.org/articles/aa/pdf/2010/15/aa10340-08.pdf http://hdl.handle.net/20.500.11937/43231

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author	Thone, C. Kann, D. Johannesson, G. Selj, J. Jaunsen, A. Fynbo, J. Akerlof, C. Baliyan, K. Bartolini, C. Bikmaev, I. Bloom, J. Burenin, R. Cobb, B. Covino, S. Curran, Peter Dahle, H. Ferrero, A. Foley, S. French, J. Fruchter, A. Ganesh, S. Graham, J. Greco, G. Guarnieri, A. Hanlon, L. Hjorth, J. Ibrahimov, M. Israel, G. Jakobsson, P. Jelinek, M. Jensen, B. Jorgensen, U. Khamitov, I. Koch, T. Levan, A. Malesani, D. Masetti, N. Meehan, S. Melady, G. Nanni, D. Näränen, J. Pakstiene, E. Pavlinsky, M. Perley, D. Piccioni, A. Pizzichini, G. Pozanenko, A. Roming, P. Rujopakarn, W. Rumyantsev, V. Rykoff, E. Sharapov, D. Starr, D. Sunyaev, R. Swan, H. Tanvir, N. Terra, F. de Ugarte Postigo, A. Vreeswijk, P. Wilson, A. Yost, S. Yuan, F.
author_facet	Thone, C. Kann, D. Johannesson, G. Selj, J. Jaunsen, A. Fynbo, J. Akerlof, C. Baliyan, K. Bartolini, C. Bikmaev, I. Bloom, J. Burenin, R. Cobb, B. Covino, S. Curran, Peter Dahle, H. Ferrero, A. Foley, S. French, J. Fruchter, A. Ganesh, S. Graham, J. Greco, G. Guarnieri, A. Hanlon, L. Hjorth, J. Ibrahimov, M. Israel, G. Jakobsson, P. Jelinek, M. Jensen, B. Jorgensen, U. Khamitov, I. Koch, T. Levan, A. Malesani, D. Masetti, N. Meehan, S. Melady, G. Nanni, D. Näränen, J. Pakstiene, E. Pavlinsky, M. Perley, D. Piccioni, A. Pizzichini, G. Pozanenko, A. Roming, P. Rujopakarn, W. Rumyantsev, V. Rykoff, E. Sharapov, D. Starr, D. Sunyaev, R. Swan, H. Tanvir, N. Terra, F. de Ugarte Postigo, A. Vreeswijk, P. Wilson, A. Yost, S. Yuan, F.
author_sort	Thone, C.
building	Curtin Institutional Repository
collection	Online Access
description	Aims. With this paper we want to investigate the highly variable afterglow light curve and environment of gamma-ray burst (GRB) 060526 atz = 3.221.Methods. We present one of the largest photometric datasets ever obtained for a GRB afterglow, consisting of multi-color photometric data fromthe ultraviolet to the near infrared. The data set contains 412 data points in total to which we add additional data from the literature. Furthermore,we present low-resolution high signal-to-noise spectra of the afterglow. The afterglow light curve is modeled with both an analytical model usingbroken power law fits and with a broad-band numerical model which includes energy injections. The absorption lines detected in the spectra areused to derive column densities using a multi-ion single-component curve-of-growth analysis from which we derive the metallicity of the host ofGRB 060526.Results. The temporal behaviour of the afterglow follows a double broken power law with breaks at t = 0.090± 0.005 and t = 2.401± 0.061 days.It shows deviations from the smooth set of power laws that can be modeled by additional energy injections from the central engine, although somesignificant microvariability remains. The broadband spectral-energy distribution of the afterglow shows no significant extinction along the line ofsight. The metallicity derived from S ii and Fe ii of [S/H] = –0.57±0.25 and [Fe/H] = –1.09±0.24 is relatively high for a galaxy at that redshift butcomparable to the metallicity of other GRB hosts at similar redshifts. At the position of the afterglow, no host is detected to F775W(AB) = 28.5 magwith the HST, implying an absolute magnitude of the host M(1500 Å) > –18.3 mag which is fainter than most long-duration hosts, although theGRB may be associated with a faint galaxy at a distance of 11 kpc.
first_indexed	2025-11-14T09:15:18Z
format	Journal Article
id	curtin-20.500.11937-43231
institution	Curtin University Malaysia
institution_category	Local University
last_indexed	2025-11-14T09:15:18Z
publishDate	2010
publisher	EDP Sciences
recordtype	eprints
repository_type	Digital Repository
spelling	curtin-20.500.11937-432312017-02-28T01:46:26Z Photometry and spectroscopy of GRB 060526: a detailed study of the afterglow and host galaxy of a z = 3.2 gamma-ray burst Thone, C. Kann, D. Johannesson, G. Selj, J. Jaunsen, A. Fynbo, J. Akerlof, C. Baliyan, K. Bartolini, C. Bikmaev, I. Bloom, J. Burenin, R. Cobb, B. Covino, S. Curran, Peter Dahle, H. Ferrero, A. Foley, S. French, J. Fruchter, A. Ganesh, S. Graham, J. Greco, G. Guarnieri, A. Hanlon, L. Hjorth, J. Ibrahimov, M. Israel, G. Jakobsson, P. Jelinek, M. Jensen, B. Jorgensen, U. Khamitov, I. Koch, T. Levan, A. Malesani, D. Masetti, N. Meehan, S. Melady, G. Nanni, D. Näränen, J. Pakstiene, E. Pavlinsky, M. Perley, D. Piccioni, A. Pizzichini, G. Pozanenko, A. Roming, P. Rujopakarn, W. Rumyantsev, V. Rykoff, E. Sharapov, D. Starr, D. Sunyaev, R. Swan, H. Tanvir, N. Terra, F. de Ugarte Postigo, A. Vreeswijk, P. Wilson, A. Yost, S. Yuan, F. galaxies: high-redshift gamma rays bursts: individual: GRB 060526 ISM: abundances Aims. With this paper we want to investigate the highly variable afterglow light curve and environment of gamma-ray burst (GRB) 060526 atz = 3.221.Methods. We present one of the largest photometric datasets ever obtained for a GRB afterglow, consisting of multi-color photometric data fromthe ultraviolet to the near infrared. The data set contains 412 data points in total to which we add additional data from the literature. Furthermore,we present low-resolution high signal-to-noise spectra of the afterglow. The afterglow light curve is modeled with both an analytical model usingbroken power law fits and with a broad-band numerical model which includes energy injections. The absorption lines detected in the spectra areused to derive column densities using a multi-ion single-component curve-of-growth analysis from which we derive the metallicity of the host ofGRB 060526.Results. The temporal behaviour of the afterglow follows a double broken power law with breaks at t = 0.090± 0.005 and t = 2.401± 0.061 days.It shows deviations from the smooth set of power laws that can be modeled by additional energy injections from the central engine, although somesignificant microvariability remains. The broadband spectral-energy distribution of the afterglow shows no significant extinction along the line ofsight. The metallicity derived from S ii and Fe ii of [S/H] = –0.57±0.25 and [Fe/H] = –1.09±0.24 is relatively high for a galaxy at that redshift butcomparable to the metallicity of other GRB hosts at similar redshifts. At the position of the afterglow, no host is detected to F775W(AB) = 28.5 magwith the HST, implying an absolute magnitude of the host M(1500 Å) > –18.3 mag which is fainter than most long-duration hosts, although theGRB may be associated with a faint galaxy at a distance of 11 kpc. 2010 Journal Article http://hdl.handle.net/20.500.11937/43231 http://www.aanda.org/articles/aa/pdf/2010/15/aa10340-08.pdf EDP Sciences restricted
spellingShingle	galaxies: high-redshift gamma rays bursts: individual: GRB 060526 ISM: abundances Thone, C. Kann, D. Johannesson, G. Selj, J. Jaunsen, A. Fynbo, J. Akerlof, C. Baliyan, K. Bartolini, C. Bikmaev, I. Bloom, J. Burenin, R. Cobb, B. Covino, S. Curran, Peter Dahle, H. Ferrero, A. Foley, S. French, J. Fruchter, A. Ganesh, S. Graham, J. Greco, G. Guarnieri, A. Hanlon, L. Hjorth, J. Ibrahimov, M. Israel, G. Jakobsson, P. Jelinek, M. Jensen, B. Jorgensen, U. Khamitov, I. Koch, T. Levan, A. Malesani, D. Masetti, N. Meehan, S. Melady, G. Nanni, D. Näränen, J. Pakstiene, E. Pavlinsky, M. Perley, D. Piccioni, A. Pizzichini, G. Pozanenko, A. Roming, P. Rujopakarn, W. Rumyantsev, V. Rykoff, E. Sharapov, D. Starr, D. Sunyaev, R. Swan, H. Tanvir, N. Terra, F. de Ugarte Postigo, A. Vreeswijk, P. Wilson, A. Yost, S. Yuan, F. Photometry and spectroscopy of GRB 060526: a detailed study of the afterglow and host galaxy of a z = 3.2 gamma-ray burst
title	Photometry and spectroscopy of GRB 060526: a detailed study of the afterglow and host galaxy of a z = 3.2 gamma-ray burst
title_full	Photometry and spectroscopy of GRB 060526: a detailed study of the afterglow and host galaxy of a z = 3.2 gamma-ray burst
title_fullStr	Photometry and spectroscopy of GRB 060526: a detailed study of the afterglow and host galaxy of a z = 3.2 gamma-ray burst
title_full_unstemmed	Photometry and spectroscopy of GRB 060526: a detailed study of the afterglow and host galaxy of a z = 3.2 gamma-ray burst
title_short	Photometry and spectroscopy of GRB 060526: a detailed study of the afterglow and host galaxy of a z = 3.2 gamma-ray burst
title_sort	photometry and spectroscopy of grb 060526: a detailed study of the afterglow and host galaxy of a z = 3.2 gamma-ray burst
topic	galaxies: high-redshift gamma rays bursts: individual: GRB 060526 ISM: abundances
url	http://www.aanda.org/articles/aa/pdf/2010/15/aa10340-08.pdf http://hdl.handle.net/20.500.11937/43231

Photometry and spectroscopy of GRB 060526: a detailed study of the afterglow and host galaxy of a z = 3.2 gamma-ray burst

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