@article{oai:sucra.repo.nii.ac.jp:00012966, author = {A de Ugarte, Postigo and T.A., Fatkhullin and G., Johannesson and J., Gorosabel and V.V., Sokolov and A.J., Castro-Tirado and Yu.Yu., Balega and O.I., Spiridonova and M., Jelinek and S., Guziy and D., Perez-Ramirez and J., Hjorth and P., Laursen and D., Bersier and S.B., Pandey and M., Bremer and A., Monfardini and K.Y., Huang and 浦田, 裕次 and W.H., Ip and T., Tamagawa and D., Kinoshita and T., Mizuno and Y., Arai and H., Yamagishi and T., Soyano and F., Usui and 田代, 信 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 A.P., Kamble and C.H., Ishwara Chandra and S.A., Trushkin}, issue = {3}, journal = {Astronomy and Astrophysics}, month = {}, note = {http://www.aanda.org/index.php?option=article&access=doi&doi=10.1051/0004-6361:20066660 | http://www.aanda.org/index.php?option=article&access=doi&doi=10.1051/0004-6361:20066660, Aims. Understand the shape and implications of the multiband light 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 gamma-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., 出版社版: http://www.aanda.org/index.php?option=article&access=doi&doi=10.1051/0004-6361:20066660, text, application/pdf}, pages = {L57--L60}, title = {Extensive multiband study of the X-ray rich GRB050408 A likely off-axis event with an intense energy injection}, volume = {462}, year = {2007}, yomi = {ウラタ, ユウジ and タシロ, マコト} }