Extensive multiband study of the X-ray rich GRB 050408: A likely off-axis event with an intense energy injection

A. De Ugarte Postigo; T. A. Fatkhullin; G. Jóhannesson; J. Gorosabel; V. V. Sokolov; A. J. Castro-Tirado; Yu Yu Balega; O. I. Spiridonova; M. Jelínek; S. Guziy; D. Pérez-Ramírez; J. Hjorth; P. Laursen; D. Bersier; S. B. Pandey; M. Bremer; A. Monfardini; K. Y. Huang; Y. Urata; W. H. Ip; T. Tamagawa; D. Kinoshita; T. Mizuno; Y. Arai; H. Yamagishi; T. Soyano; F. Usui; M. Tashiro; K. Abe; K. Onda; Z. Aslan; I. Khamitov; T. Ozisik; U. Kiziloglu; I. Bikmaev; N. Sakhibullin; R. Burenin; M. Pavlinsky; R. Sunyaev; D. Bhattacharya; A. P. Kamble; C. H.Ishwara Chandra; S. A. Trushkin

doi:10.1051/0004-6361:20066660

Extensive multiband study of the X-ray rich GRB 050408: A likely off-axis event with an intense energy injection

A. De Ugarte Postigo, T. A. Fatkhullin, G. Jóhannesson, J. Gorosabel, V. V. Sokolov, A. J. Castro-Tirado, Yu Yu Balega, O. I. Spiridonova, M. Jelínek, S. Guziy, D. Pérez-Ramírez, J. Hjorth, P. Laursen, D. Bersier, S. B. Pandey, M. Bremer, A. Monfardini, K. Y. Huang, Y. Urata, W. H. IpT. Tamagawa, D. Kinoshita, T. Mizuno, Y. Arai, H. Yamagishi, T. Soyano, F. Usui, M. Tashiro, K. Abe, K. Onda, Z. Aslan, I. Khamitov, T. Ozisik, U. Kiziloglu, I. Bikmaev, N. Sakhibullin, R. Burenin, M. Pavlinsky, R. Sunyaev, D. Bhattacharya, A. P. Kamble, C. H.Ishwara Chandra, S. A. Trushkin

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摘要

Aims. Understand the shape and implications of the multiband ligth curve of GRB 050408, an X-ray rich (XRR) burst. Methods. We present a multiband optical light curve, covering the time from the onset of the γ-ray event to several months after, when we only detect the host galaxy. Together with X-ray, millimetre and radio observations we compile what, to our knowledge, is the most complete multiband coverage of an XRR burst afterglow to date. Results. The optical and X-ray light curve is characterised by an early flattening and an intense bump peaking around 6 days after the burst onset. We explain the former by an off-axis viewed jet, in agreement with the predictions made for XRR by some models, and the latter with an energy injection equivalent in intensity to the initial shock. The analysis of the spectral flux distribution reveals an extinction compatible with a low chemical enrichment surrounding the burst. Together with the detection of an underlying starburst host galaxy we can strengthen the link between XRR and classical long-duration bursts.

原文	???core.languages.en_GB???
頁（從 - 到）	L57-L60
期刊	Astronomy and Astrophysics
卷	462
發行號	3
DOIs	https://doi.org/10.1051/0004-6361:20066660
出版狀態	已出版 - 2月 2007

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De Ugarte Postigo, A., Fatkhullin, T. A., Jóhannesson, G., Gorosabel, J., Sokolov, V. V., Castro-Tirado, A. J., Balega, Y. Y., Spiridonova, O. I., Jelínek, M., Guziy, S., Pérez-Ramírez, D., Hjorth, J., Laursen, P., Bersier, D., Pandey, S. B., Bremer, M., Monfardini, A., Huang, K. Y., Urata, Y., ... Trushkin, S. A. (2007). Extensive multiband study of the X-ray rich GRB 050408: A likely off-axis event with an intense energy injection. Astronomy and Astrophysics, 462(3), L57-L60. https://doi.org/10.1051/0004-6361:20066660

@article{5544065c5b774ac98377cbf1db798d31,

title = "Extensive multiband study of the X-ray rich GRB 050408: A likely off-axis event with an intense energy injection",

abstract = "Aims. Understand the shape and implications of the multiband ligth curve of GRB 050408, an X-ray rich (XRR) burst. Methods. We present a multiband optical light curve, covering the time from the onset of the γ-ray event to several months after, when we only detect the host galaxy. Together with X-ray, millimetre and radio observations we compile what, to our knowledge, is the most complete multiband coverage of an XRR burst afterglow to date. Results. The optical and X-ray light curve is characterised by an early flattening and an intense bump peaking around 6 days after the burst onset. We explain the former by an off-axis viewed jet, in agreement with the predictions made for XRR by some models, and the latter with an energy injection equivalent in intensity to the initial shock. The analysis of the spectral flux distribution reveals an extinction compatible with a low chemical enrichment surrounding the burst. Together with the detection of an underlying starburst host galaxy we can strengthen the link between XRR and classical long-duration bursts.",

keywords = "Gamma rays: bursts, Techniques: photometric",

author = "{De Ugarte Postigo}, A. and Fatkhullin, {T. A.} and G. J{\'o}hannesson and J. Gorosabel and Sokolov, {V. V.} and Castro-Tirado, {A. J.} and Balega, {Yu Yu} and Spiridonova, {O. I.} and M. Jel{\'i}nek and S. Guziy and D. P{\'e}rez-Ram{\'i}rez and J. Hjorth and P. Laursen and D. Bersier and Pandey, {S. B.} and M. Bremer and A. Monfardini and Huang, {K. Y.} and Y. Urata and Ip, {W. H.} and T. Tamagawa and D. Kinoshita and T. Mizuno and Y. Arai and H. Yamagishi and T. Soyano and F. Usui and M. Tashiro and K. Abe and K. Onda and Z. Aslan and I. Khamitov and T. Ozisik and U. Kiziloglu and I. Bikmaev and N. Sakhibullin and R. Burenin and M. Pavlinsky and R. Sunyaev and D. Bhattacharya and Kamble, {A. P.} and Chandra, {C. H.Ishwara} and Trushkin, {S. A.}",

year = "2007",

month = feb,

doi = "10.1051/0004-6361:20066660",

language = "???core.languages.en_GB???",

volume = "462",

pages = "L57--L60",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

number = "3",

}

De Ugarte Postigo, A, Fatkhullin, TA, Jóhannesson, G, Gorosabel, J, Sokolov, VV, Castro-Tirado, AJ, Balega, YY, Spiridonova, OI, Jelínek, M, Guziy, S, Pérez-Ramírez, D, Hjorth, J, Laursen, P, Bersier, D, Pandey, SB, Bremer, M, Monfardini, A, Huang, KY, Urata, Y, Ip, WH, Tamagawa, T, Kinoshita, D, Mizuno, T, Arai, Y, Yamagishi, H, Soyano, T, Usui, F, Tashiro, M, Abe, K, Onda, K, Aslan, Z, Khamitov, I, Ozisik, T, Kiziloglu, U, Bikmaev, I, Sakhibullin, N, Burenin, R, Pavlinsky, M, Sunyaev, R, Bhattacharya, D, Kamble, AP, Chandra, CHI & Trushkin, SA 2007, 'Extensive multiband study of the X-ray rich GRB 050408: A likely off-axis event with an intense energy injection', Astronomy and Astrophysics, 卷 462, 編號 3, 頁 L57-L60. https://doi.org/10.1051/0004-6361:20066660

TY - JOUR

T1 - Extensive multiband study of the X-ray rich GRB 050408

T2 - A likely off-axis event with an intense energy injection

AU - De Ugarte Postigo, A.

AU - Fatkhullin, T. A.

AU - Jóhannesson, G.

AU - Gorosabel, J.

AU - Sokolov, V. V.

AU - Castro-Tirado, A. J.

AU - Balega, Yu Yu

AU - Spiridonova, O. I.

AU - Jelínek, M.

AU - Guziy, S.

AU - Pérez-Ramírez, D.

AU - Hjorth, J.

AU - Laursen, P.

AU - Bersier, D.

AU - Pandey, S. B.

AU - Bremer, M.

AU - Monfardini, A.

AU - Huang, K. Y.

AU - Urata, Y.

AU - Ip, W. H.

AU - Tamagawa, T.

AU - Kinoshita, D.

AU - Mizuno, T.

AU - Arai, Y.

AU - Yamagishi, H.

AU - Soyano, T.

AU - Usui, F.

AU - Tashiro, M.

AU - Abe, K.

AU - Onda, K.

AU - Aslan, Z.

AU - Khamitov, I.

AU - Ozisik, T.

AU - Kiziloglu, U.

AU - Bikmaev, I.

AU - Sakhibullin, N.

AU - Burenin, R.

AU - Pavlinsky, M.

AU - Sunyaev, R.

AU - Bhattacharya, D.

AU - Kamble, A. P.

AU - Chandra, C. H.Ishwara

AU - Trushkin, S. A.

PY - 2007/2

Y1 - 2007/2

N2 - Aims. Understand the shape and implications of the multiband ligth curve of GRB 050408, an X-ray rich (XRR) burst. Methods. We present a multiband optical light curve, covering the time from the onset of the γ-ray event to several months after, when we only detect the host galaxy. Together with X-ray, millimetre and radio observations we compile what, to our knowledge, is the most complete multiband coverage of an XRR burst afterglow to date. Results. The optical and X-ray light curve is characterised by an early flattening and an intense bump peaking around 6 days after the burst onset. We explain the former by an off-axis viewed jet, in agreement with the predictions made for XRR by some models, and the latter with an energy injection equivalent in intensity to the initial shock. The analysis of the spectral flux distribution reveals an extinction compatible with a low chemical enrichment surrounding the burst. Together with the detection of an underlying starburst host galaxy we can strengthen the link between XRR and classical long-duration bursts.

AB - Aims. Understand the shape and implications of the multiband ligth curve of GRB 050408, an X-ray rich (XRR) burst. Methods. We present a multiband optical light curve, covering the time from the onset of the γ-ray event to several months after, when we only detect the host galaxy. Together with X-ray, millimetre and radio observations we compile what, to our knowledge, is the most complete multiband coverage of an XRR burst afterglow to date. Results. The optical and X-ray light curve is characterised by an early flattening and an intense bump peaking around 6 days after the burst onset. We explain the former by an off-axis viewed jet, in agreement with the predictions made for XRR by some models, and the latter with an energy injection equivalent in intensity to the initial shock. The analysis of the spectral flux distribution reveals an extinction compatible with a low chemical enrichment surrounding the burst. Together with the detection of an underlying starburst host galaxy we can strengthen the link between XRR and classical long-duration bursts.

KW - Gamma rays: bursts

KW - Techniques: photometric

UR - http://www.scopus.com/inward/record.url?scp=33846794529&partnerID=8YFLogxK

U2 - 10.1051/0004-6361:20066660

DO - 10.1051/0004-6361:20066660

M3 - 期刊論文

AN - SCOPUS:33846794529

SN - 0004-6361

VL - 462

SP - L57-L60

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

IS - 3

ER -

Extensive multiband study of the X-ray rich GRB 050408: A likely off-axis event with an intense energy injection

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