GRB 081203A: Swift UVOT captures the earliest ultraviolet spectrum of a gamma-ray burst
We present the earliest ultraviolet (UV) spectrum of a gamma-ray burst (GRB) as observed with the Swift Ultra-Violet/Optical Telescope (UVOT). The GRB 081203A spectrum was observed for 50 s with the UV-grism starting 251 s after the Swift-Burst-Alert-Telescope (BAT) trigger. During this time, the GR...
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| Veröffentlicht in: | Monthly notices of the Royal Astronomical Society. Letters 2009-05, Vol.395 (1), p.L21-L24 |
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| creator | Kuin, N. P. M. Landsman, W. Page, M. J. Schady, P. Still, M. Breeveld, A. A. De Pasquale, M. Roming, P. W. A. Brown, P. J. Carter, M. James, C. Curran, P. A. Cucchiara, A. Gronwall, C. Holland, S. T. Hoversten, E. A. Hunsberger, S. Kennedy, T. Koch, S. Lamoureux, H. Marshall, F. E. Oates, S. R. Parsons, A. Palmer, D. M. Smith, P. J. |
| description | We present the earliest ultraviolet (UV) spectrum of a gamma-ray burst (GRB) as observed with the Swift Ultra-Violet/Optical Telescope (UVOT). The GRB 081203A spectrum was observed for 50 s with the UV-grism starting 251 s after the Swift-Burst-Alert-Telescope (BAT) trigger. During this time, the GRB was ≈13.4 mag (u filter) and was still rising to its peak optical brightness. In the UV-grism spectrum, we find a damped Lyα line, Lyβ and the Lyman continuum break at a redshift z= 2.05 ± 0.01. A model fit to the Lyman absorption implies a gas column density of log NH i= 22.0 ± 0.1 cm−2, which is typical of GRB host galaxies with damped Lyα absorbers. This observation of GRB 081203A demonstrates that for brighter GRBs (v≈ 14 mag) with moderate redshift (0.5 < z < 3.5) the UVOT is able to provide redshifts, and probe for damped Lyα absorbers within 4–6 min from the time of the Swift-BAT trigger. |
| doi_str_mv | 10.1111/j.1745-3933.2009.00632.x |
| format | Article |
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P. M. ; Landsman, W. ; Page, M. J. ; Schady, P. ; Still, M. ; Breeveld, A. A. ; De Pasquale, M. ; Roming, P. W. A. ; Brown, P. J. ; Carter, M. ; James, C. ; Curran, P. A. ; Cucchiara, A. ; Gronwall, C. ; Holland, S. T. ; Hoversten, E. A. ; Hunsberger, S. ; Kennedy, T. ; Koch, S. ; Lamoureux, H. ; Marshall, F. E. ; Oates, S. R. ; Parsons, A. ; Palmer, D. M. ; Smith, P. J.</creator><creatorcontrib>Kuin, N. P. M. ; Landsman, W. ; Page, M. J. ; Schady, P. ; Still, M. ; Breeveld, A. A. ; De Pasquale, M. ; Roming, P. W. A. ; Brown, P. J. ; Carter, M. ; James, C. ; Curran, P. A. ; Cucchiara, A. ; Gronwall, C. ; Holland, S. T. ; Hoversten, E. A. ; Hunsberger, S. ; Kennedy, T. ; Koch, S. ; Lamoureux, H. ; Marshall, F. E. ; Oates, S. R. ; Parsons, A. ; Palmer, D. M. ; Smith, P. J.</creatorcontrib><description>We present the earliest ultraviolet (UV) spectrum of a gamma-ray burst (GRB) as observed with the Swift Ultra-Violet/Optical Telescope (UVOT). The GRB 081203A spectrum was observed for 50 s with the UV-grism starting 251 s after the Swift-Burst-Alert-Telescope (BAT) trigger. During this time, the GRB was ≈13.4 mag (u filter) and was still rising to its peak optical brightness. In the UV-grism spectrum, we find a damped Lyα line, Lyβ and the Lyman continuum break at a redshift z= 2.05 ± 0.01. A model fit to the Lyman absorption implies a gas column density of log NH i= 22.0 ± 0.1 cm−2, which is typical of GRB host galaxies with damped Lyα absorbers. This observation of GRB 081203A demonstrates that for brighter GRBs (v≈ 14 mag) with moderate redshift (0.5 < z < 3.5) the UVOT is able to provide redshifts, and probe for damped Lyα absorbers within 4–6 min from the time of the Swift-BAT trigger.</description><identifier>ISSN: 1745-3925</identifier><identifier>EISSN: 1745-3933</identifier><identifier>DOI: 10.1111/j.1745-3933.2009.00632.x</identifier><language>eng</language><publisher>Oxford, UK: Blackwell Science Ltd</publisher><subject>gamma-rays: bursts ; instrumentation: spectrographs</subject><ispartof>Monthly notices of the Royal Astronomical Society. Letters, 2009-05, Vol.395 (1), p.L21-L24</ispartof><rights>2009 The Authors. 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J.</creatorcontrib><title>GRB 081203A: Swift UVOT captures the earliest ultraviolet spectrum of a gamma-ray burst</title><title>Monthly notices of the Royal Astronomical Society. Letters</title><addtitle>MNRAS</addtitle><description>We present the earliest ultraviolet (UV) spectrum of a gamma-ray burst (GRB) as observed with the Swift Ultra-Violet/Optical Telescope (UVOT). The GRB 081203A spectrum was observed for 50 s with the UV-grism starting 251 s after the Swift-Burst-Alert-Telescope (BAT) trigger. During this time, the GRB was ≈13.4 mag (u filter) and was still rising to its peak optical brightness. In the UV-grism spectrum, we find a damped Lyα line, Lyβ and the Lyman continuum break at a redshift z= 2.05 ± 0.01. A model fit to the Lyman absorption implies a gas column density of log NH i= 22.0 ± 0.1 cm−2, which is typical of GRB host galaxies with damped Lyα absorbers. This observation of GRB 081203A demonstrates that for brighter GRBs (v≈ 14 mag) with moderate redshift (0.5 < z < 3.5) the UVOT is able to provide redshifts, and probe for damped Lyα absorbers within 4–6 min from the time of the Swift-BAT trigger.</description><subject>gamma-rays: bursts</subject><subject>instrumentation: spectrographs</subject><issn>1745-3925</issn><issn>1745-3933</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2009</creationdate><recordtype>article</recordtype><recordid>eNqNkEtPwzAQhCMEElD4Dz5xS9jYdeJwQAJEAakP8UZcrI3rQEpCgu3Q9t-TENQze9mRdma0-jyPhBCE7RwvgjAecp8ljAUUIAkAIkaD1Za3tzlsbzTlu96-tQsAFotY7HnPV3fnBERIgZ2dkPtlnjny-DR7IApr1xhtiXvXRKMpcm0daQpn8DuvCu2IrbVypilJlREkb1iW6Btck7Qx1h14OxkWVh_-7YH3OLp8uLj2x7Orm4uzsa-Gw4T6NGWx5mmoIIsyDSybM1SJ0ICpRpGE8yEKmkLEeSZUDBHgnNJUpTzFziTYwDvqe2tTfTXti7LMrdJFgZ-6aqykwAUIwVuj6I3KVNYancna5CWatQxBdiTlQnaQZAdMdiTlL0m5aqOnfXSZF3r975ycTMe0k22B3xfk1unVpgDNh4xiFnN5_fIq2fl0ens7mkhgP8WaiK0</recordid><startdate>200905</startdate><enddate>200905</enddate><creator>Kuin, N. 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Letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Kuin, N. P. M.</au><au>Landsman, W.</au><au>Page, M. J.</au><au>Schady, P.</au><au>Still, M.</au><au>Breeveld, A. A.</au><au>De Pasquale, M.</au><au>Roming, P. W. A.</au><au>Brown, P. J.</au><au>Carter, M.</au><au>James, C.</au><au>Curran, P. A.</au><au>Cucchiara, A.</au><au>Gronwall, C.</au><au>Holland, S. T.</au><au>Hoversten, E. A.</au><au>Hunsberger, S.</au><au>Kennedy, T.</au><au>Koch, S.</au><au>Lamoureux, H.</au><au>Marshall, F. E.</au><au>Oates, S. R.</au><au>Parsons, A.</au><au>Palmer, D. M.</au><au>Smith, P. J.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>GRB 081203A: Swift UVOT captures the earliest ultraviolet spectrum of a gamma-ray burst</atitle><jtitle>Monthly notices of the Royal Astronomical Society. Letters</jtitle><addtitle>MNRAS</addtitle><date>2009-05</date><risdate>2009</risdate><volume>395</volume><issue>1</issue><spage>L21</spage><epage>L24</epage><pages>L21-L24</pages><issn>1745-3925</issn><eissn>1745-3933</eissn><abstract>We present the earliest ultraviolet (UV) spectrum of a gamma-ray burst (GRB) as observed with the Swift Ultra-Violet/Optical Telescope (UVOT). The GRB 081203A spectrum was observed for 50 s with the UV-grism starting 251 s after the Swift-Burst-Alert-Telescope (BAT) trigger. During this time, the GRB was ≈13.4 mag (u filter) and was still rising to its peak optical brightness. In the UV-grism spectrum, we find a damped Lyα line, Lyβ and the Lyman continuum break at a redshift z= 2.05 ± 0.01. A model fit to the Lyman absorption implies a gas column density of log NH i= 22.0 ± 0.1 cm−2, which is typical of GRB host galaxies with damped Lyα absorbers. This observation of GRB 081203A demonstrates that for brighter GRBs (v≈ 14 mag) with moderate redshift (0.5 < z < 3.5) the UVOT is able to provide redshifts, and probe for damped Lyα absorbers within 4–6 min from the time of the Swift-BAT trigger.</abstract><cop>Oxford, UK</cop><pub>Blackwell Science Ltd</pub><doi>10.1111/j.1745-3933.2009.00632.x</doi><tpages>4</tpages></addata></record> |
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| subjects | gamma-rays: bursts instrumentation: spectrographs |
| title | GRB 081203A: Swift UVOT captures the earliest ultraviolet spectrum of a gamma-ray burst |
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