Multiband fitting to three long GRBs with Fermi/LAT data:structured ejecta sweeping up a density-jump medium |
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| Authors: | Si-Yi Feng Zi-Gao Dai |
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| Institution: | Si-Yi Feng and Zi-Gao Dai Department of Astronomy,Nanjing University,Nanjing 210093,China Key Laboratory of Modern Astronomy and Astrophysics (Nanjing University),Ministry of Education,China |
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| Abstract: | We present broadband (radio,optical,X-ray and GeV) fits to the afterglow light curves and spectra of three long-duration gamma-ray bursts (GRBs 080916C,090902B,and 090926A) detected by the Gamma-Ray Burst Monitor and Large Area Telescope (LAT) instruments on the Fermi satellite.Using the observed broadband data,we study the origin of the high energy emission,and suggest that the early-time GeV emission and the late-time radio,optical,and X-ray afterglows can be understood as being due to synchrotron emissio... |
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