Multicolor Shallow Decay and Chromatic Breaks in the GRB 050319 Optical Afterglow
Multicolor Shallow Decay and Chromatic Breaks in the GRB 050319 Optical Afterglow
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DOI：
10.1086/510737
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发表时间：
2006-11
期刊：
影响因子：
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通讯作者：
K. Huang;Y. Urata;P. Kuo;W. Ip;K. Ioka;T. Aoki;C. W. Chen;W. P. Chen;M. Isogai;H. C. Lin;K. Makishima;H. Mito;T. Miyata;Y. Nakada;S. Nishiura;K. Onda;Y. Qiu;T. Soyano;T. Tamagawa;K. Tarusawa;M. Tashiro;T. Yoshioka
中科院分区：
文献类型：
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作者：
K. Huang;Y. Urata;P. Kuo;W. Ip;K. Ioka;T. Aoki;C. W. Chen;W. P. Chen;M. Isogai;H. C. Lin;K. Makishima;H. Mito;T. Miyata;Y. Nakada;S. Nishiura;K. Onda;Y. Qiu;T. Soyano;T. Tamagawa;K. Tarusawa;M. Tashiro;T. Yoshioka
对伽玛暴050319的光学余辉进行了多波长观测，观测时间为爆发后1.31h至9.92h。我们的R波段光曲线，结合其他已发表的数据，可以用光滑的破缺幂函数来描述，α1=-0.84±0.02到α2=-0.48±0.03，在伽马射线暴发生0.04天后。光学光曲线的特征是浅衰变--正如在X射线中也观察到的--可能有类似的起源，与能量注入有关。然而，我们的观察表明，关于R波段光曲线(0.04d)和X射线光曲线(0.004天)的色散仍然是一个有待解决的谜题。
Multiwavelength observations of the optical afterglow of GRB 050319 were performed from 1.31 to 9.92 hr after the burst. Our R-band light curves, combined with other published data, can be described by the smooth broken power-law function, with α1 = -0.84 ± 0.02 to α2 = -0.48 ± 0.03, 0.04 days after the gamma-ray burst. The optical light curves are characterized by shallow decays—as was also observed in the X-rays—which may have a similar origin, related to energy injection. However, our observations indicate that there is still a puzzle concerning the chromatic breaks in the R-band light curve (at 0.04 days) and the X-ray light curve (at 0.004 days) that remains to be solved.