Photometry and spectroscopy of the GRB 970508 optical counterpart

被引:44
作者
Castro-Tirado, AJ [1 ]
Gorosabel, J
Benítez, N
Wolf, C
Fockenbrock, R
Martínez-González, E
Kristen, H
Broeils, A
Pedersen, H
Greiner, J
Costa, E
Feroci, M
Piro, L
Frontera, F
Nicastro, L
Palazzi, E
Bartolini, C
Guarnieri, A
Masetti, N
Piccioni, A
Mignoli, M
Wold, M
Lacy, M
Birkle, K
Broadhurst, T
Brandt, S
Lund, N
机构
[1] INTA, Lab Astrofis Espacial & Fis Fundamental, Madrid, Spain
[2] Inst Fis Cantabria, Santander, Spain
[3] Max Planck Inst Astron, D-69117 Heidelberg, Germany
[4] Stockholm Observ, Saltsjobaden, Sweden
[5] Copenhagen Univ Observ, DK-1350 Copenhagen, Denmark
[6] Inst Astrophys, Potsdam, Germany
[7] CNR, Ist Astrofis Spaziale, I-00044 Frascati, Italy
[8] Univ Ferrara, Dipartimento Fis, I-44100 Ferrara, Italy
[9] CNR, Ist Tecnol & Studio Radiazioni Extraterr, I-40126 Bologna, Italy
[10] Univ Bologna, Dipartimento Astron, Bologna, Italy
[11] Osservatorio Astron Bologna, Bologna, Italy
[12] Nucl & Astrophys Lab, Oxford, England
[13] Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA
[14] Los Alamos Natl Lab, Los Alamos, NM 87545 USA
[15] Danish Space Res Inst, Copenhagen, Denmark
关键词
D O I
10.1126/science.279.5353.1011
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
An optical transient within the error box of the gamma ray burst GRB 970508 was imaged 4 hours after the event. It displayed a strong ultraviolet excess, and reached maximum brightness 2 days later. The optical spectra did not show any emission lines, and no variations on time scales of minutes were observed for 1 hour during the decline phase. According to the fireball and afterglow models, the intensity should rise monotonically before the observed optical maximum, but the data indicate that another physical mechanism may be responsible for the constant phase seen during the first hours after the burst.
引用
收藏
页码:1011 / 1014
页数:4
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