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GCN Circular 20889

GRB 170317A: GMG observation
2017-03-17T14:58:21Z (7 years ago)
Jirong Mao at Yunnan Obs <>
J. Mao, Y. Xin and J.-M. Bai (YNAO) report:

We observed the field of GRB 170317A (LaPorte et al., GCN 20885) with the 2.4-meter
optical telescope at Gao-Mei-Gu (GMG) station of Yunnan Observatories. Observations began
from 13:58:18 UT, about 4.2 hours after the trigger. We detected the afterglow with
R~19.96+/-0.10 mag, calibrated by a nearby USNO-B1.0 star.
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