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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2006
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00046361_v459_n1_pL5_Pellizza http://hdl.handle.net/20.500.12110/paper_00046361_v459_n1_pL5_Pellizza |
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paper:paper_00046361_v459_n1_pL5_Pellizza2025-07-30T17:11:12Z GRB 050223: A dark GRB in a dusty starburst galaxy 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. 2006 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00046361_v459_n1_pL5_Pellizza 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 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. |
| 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 |
| publishDate |
2006 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00046361_v459_n1_pL5_Pellizza http://hdl.handle.net/20.500.12110/paper_00046361_v459_n1_pL5_Pellizza |
| _version_ |
1840322323361562624 |