摘要
A gamma-ray burst （GRB） optical photometric follow-up system at the Xinglong Observatory of National Astronomical Observatories of China （NAOC） has been constructed. It uses the 0.8-m Tsinghua-NAOC Telescope （TNT） and the 1-m EST telescope, and can au- tomatically respond to GRB Coordinates Network （GCN） alerts. Both telescopes slew relatively fast, being able to point to a new target field within - 1 min upon a request. Whenever available, the 2.16-m NAOC telescope is also used. In 2006 the system responded to 15 GRBs and detected seven early afterglows. In 2007 six GRBs have been detected among 18 follow- up observations. TNT observations of the second most distant GRB 060927 （z = 5.5） are shown, which started as early as 91 s after the GRB trigger. The afterglow was detected in the combined image of the first 19 × 20 s unfiltered exposures. This GRB follow-up system has joined the East-Asia GRB Follow-up Observation Network （EAFON）.
A gamma-ray burst （GRB） optical photometric follow-up system at the Xinglong Observatory of National Astronomical Observatories of China （NAOC） has been constructed. It uses the 0.8-m Tsinghua-NAOC Telescope （TNT） and the 1-m EST telescope, and can au- tomatically respond to GRB Coordinates Network （GCN） alerts. Both telescopes slew relatively fast, being able to point to a new target field within - 1 min upon a request. Whenever available, the 2.16-m NAOC telescope is also used. In 2006 the system responded to 15 GRBs and detected seven early afterglows. In 2007 six GRBs have been detected among 18 follow- up observations. TNT observations of the second most distant GRB 060927 （z = 5.5） are shown, which started as early as 91 s after the GRB trigger. The afterglow was detected in the combined image of the first 19 × 20 s unfiltered exposures. This GRB follow-up system has joined the East-Asia GRB Follow-up Observation Network （EAFON）.
基金
Supported by the National Natural Science Foundation of China(No.10673014)
