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Optical light curve of GRB 121011A:a textbook for the onset of GRB afterglow in a mixture of ISM and wind-type medium
Xin Liping; Wei Jianyan; Qiu Yulei; Deng Jinsong; Wang Jing; Han Xuhui
2016
Source PublicationResearch in Astronomy and Astrophysics
ISSN1674-4527
Volume16Issue:1Pages:12
AbstractWe report the optical observations of GRB 121011A by the 0.8m TNT facility at Xinglong observatory, China. The light curve of the optical afterglow shows a smooth and featureless bump during the epoch of ~130 s and ~5000 s with a rising index of 1.57±0.28 before the break time of 539±44 s, and a decaying index of about 1.29 ± 0.07 up to the end of our observations. Moreover, the X-ray light curve decays in a single power-law with a slope of about 1.51± 0.03 observed by XRT onboard Swift from 100 s to about 10 000 s after the burst trigger. The featureless optical light curve could be understood as an onset process under the external-shockmodel. The typical frequency has been below or near the optical one before the deceleration time, and the cooling frequency is located between the optical and X-ray wavelengths. The external medium density has a transition from a mixed stage of ISM and wind-type medium before the peak time to the ISM at the later phase. The joint-analysis of X-ray and optical light curves shows that the emissions from both frequencies are consistent with the prediction of the standard afterglow model without any energy injections, indicating that the central engine has stopped its activity and does not restart anymore after the prompt phase.
Language英语
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/49258
Collection中国科学院国家天文台
Affiliation中国科学院国家天文台
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Xin Liping,Wei Jianyan,Qiu Yulei,et al. Optical light curve of GRB 121011A:a textbook for the onset of GRB afterglow in a mixture of ISM and wind-type medium[J]. Research in Astronomy and Astrophysics,2016,16(1):12.
APA Xin Liping,Wei Jianyan,Qiu Yulei,Deng Jinsong,Wang Jing,&Han Xuhui.(2016).Optical light curve of GRB 121011A:a textbook for the onset of GRB afterglow in a mixture of ISM and wind-type medium.Research in Astronomy and Astrophysics,16(1),12.
MLA Xin Liping,et al."Optical light curve of GRB 121011A:a textbook for the onset of GRB afterglow in a mixture of ISM and wind-type medium".Research in Astronomy and Astrophysics 16.1(2016):12.
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