GRB 050223: A dark GRB in a dusty starburst galaxy

Aims. We aim at detecting and determining the properties of the host galaxy of the dark GRB 050223. Methods. We use VLT optical/NIR images coupled to Swift X-ray positioning, and optical spectra of the host galaxy to measure its properties. Results. We find a single galaxy within the Swift error box...

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Autores principales:	Pellizza, L.J., Duc, P.-A., Le Floc'h, E., Mirabel, I.F., Antonelli, L.A., Campana, S., Chincarini, G., Cimatti, A., Covino, S., Della Valle, M., Fiore, F., Fugazza, D., Giommi, P., Goldoni, P., Israel, G.L., Molinari, E., Moretti, A., Piro, L., Saracco, P., Stella, L., Tagliaferri, G., Vietri, M.
Formato:	JOUR
Materias:	Galaxies Gamma rays: bursts Starburst Astrophysics Dust Luminous materials Space research X ray analysis Dusty starburst galaxy Emission lines Optical spectra
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_00046361_v459_n1_pL5_Pellizza
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_00046361_v459_n1_pL5_Pellizza
record_format	dspace
spelling	todo:paper_00046361_v459_n1_pL5_Pellizza2023-10-03T14:00:17Z GRB 050223: A dark GRB in a dusty starburst galaxy Pellizza, L.J. Duc, P.-A. Le Floc'h, E. Mirabel, I.F. Antonelli, L.A. Campana, S. Chincarini, G. Cimatti, A. Covino, S. Della Valle, M. Fiore, F. Fugazza, D. Giommi, P. Goldoni, P. Israel, G.L. Molinari, E. Moretti, A. Piro, L. Saracco, P. Stella, L. Tagliaferri, G. Vietri, M. Galaxies Gamma rays: bursts Starburst Astrophysics Dust Luminous materials Space research X ray analysis Dusty starburst galaxy Emission lines Gamma rays: bursts Optical spectra Galaxies Aims. We aim at detecting and determining the properties of the host galaxy of the dark GRB 050223. Methods. We use VLT optical/NIR images coupled to Swift X-ray positioning, and optical spectra of the host galaxy to measure its properties. Results. We find a single galaxy within the Swift error box of GRB 050223. It is located at z = 0.584 and its luminosity is L ∼ 0.4 L*. Emission lines in the galaxy spectrum imply an intrinsic SFR > 7 M ⊙ yr-1, and a large extinction Av > 2 mag within it. We also detect absorption lines, which reveal an underlying stellar population with an age between 40 Myr and 1.5 Gyr. Conclusions. The identification of a host galaxy with atypical properties using only the X-ray transient suggests that a bias may be present in the former sample of host galaxies. Dust obscuration together with intrinsic faintness are the most probable causes for the darkness of this burst. © ESO 2006. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00046361_v459_n1_pL5_Pellizza
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Galaxies Gamma rays: bursts Starburst Astrophysics Dust Luminous materials Space research X ray analysis Dusty starburst galaxy Emission lines Gamma rays: bursts Optical spectra Galaxies
spellingShingle	Galaxies Gamma rays: bursts Starburst Astrophysics Dust Luminous materials Space research X ray analysis Dusty starburst galaxy Emission lines Gamma rays: bursts Optical spectra Galaxies Pellizza, L.J. Duc, P.-A. Le Floc'h, E. Mirabel, I.F. Antonelli, L.A. Campana, S. Chincarini, G. Cimatti, A. Covino, S. Della Valle, M. Fiore, F. Fugazza, D. Giommi, P. Goldoni, P. Israel, G.L. Molinari, E. Moretti, A. Piro, L. Saracco, P. Stella, L. Tagliaferri, G. Vietri, M. GRB 050223: A dark GRB in a dusty starburst galaxy
topic_facet	Galaxies Gamma rays: bursts Starburst Astrophysics Dust Luminous materials Space research X ray analysis Dusty starburst galaxy Emission lines Gamma rays: bursts Optical spectra Galaxies
description	Aims. We aim at detecting and determining the properties of the host galaxy of the dark GRB 050223. Methods. We use VLT optical/NIR images coupled to Swift X-ray positioning, and optical spectra of the host galaxy to measure its properties. Results. We find a single galaxy within the Swift error box of GRB 050223. It is located at z = 0.584 and its luminosity is L ∼ 0.4 L*. Emission lines in the galaxy spectrum imply an intrinsic SFR > 7 M ⊙ yr-1, and a large extinction Av > 2 mag within it. We also detect absorption lines, which reveal an underlying stellar population with an age between 40 Myr and 1.5 Gyr. Conclusions. The identification of a host galaxy with atypical properties using only the X-ray transient suggests that a bias may be present in the former sample of host galaxies. Dust obscuration together with intrinsic faintness are the most probable causes for the darkness of this burst. © ESO 2006.
format	JOUR
author	Pellizza, L.J. Duc, P.-A. Le Floc'h, E. Mirabel, I.F. Antonelli, L.A. Campana, S. Chincarini, G. Cimatti, A. Covino, S. Della Valle, M. Fiore, F. Fugazza, D. Giommi, P. Goldoni, P. Israel, G.L. Molinari, E. Moretti, A. Piro, L. Saracco, P. Stella, L. Tagliaferri, G. Vietri, M.
author_facet	Pellizza, L.J. Duc, P.-A. Le Floc'h, E. Mirabel, I.F. Antonelli, L.A. Campana, S. Chincarini, G. Cimatti, A. Covino, S. Della Valle, M. Fiore, F. Fugazza, D. Giommi, P. Goldoni, P. Israel, G.L. Molinari, E. Moretti, A. Piro, L. Saracco, P. Stella, L. Tagliaferri, G. Vietri, M.
author_sort	Pellizza, L.J.
title	GRB 050223: A dark GRB in a dusty starburst galaxy
title_short	GRB 050223: A dark GRB in a dusty starburst galaxy
title_full	GRB 050223: A dark GRB in a dusty starburst galaxy
title_fullStr	GRB 050223: A dark GRB in a dusty starburst galaxy
title_full_unstemmed	GRB 050223: A dark GRB in a dusty starburst galaxy
title_sort	grb 050223: a dark grb in a dusty starburst galaxy
url	http://hdl.handle.net/20.500.12110/paper_00046361_v459_n1_pL5_Pellizza
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GRB 050223: A dark GRB in a dusty starburst galaxy

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