TITLE:   GCN CIRCULAR
NUMBER:  34874
SUBJECT: The photometry of the transient in Messier 31 field: GMG observation
DATE:    23/10/24 01:51:10 GMT
FROM:    Rui-Zhi Li at Yunnan Astronomical Observatory, CAS <liruizhi@ynao.ac.cn>

R.-Z. Li, B.-T. Wang, J. Mao, X.-L. Zhang, J.-J. Zhang, and J.-M. Bai (YNAO) report:

We followed the GCN circular on the discovery of an optical transient as a new blazar candidate in the Messier 31 field (Gianluca et al. GCN 34819). We observed the transient with the 2.4-meter optical telescope at Gao-Mei-Gu (GMG) station of Yunnan Observatories. The preliminary results are shown as
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UT				filter	mag
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2023-10-17T14:16:13.243		B	20.14 ± 0.12
2023-10-17T14:19:54.225		V	17.80 ± 0.09
2023-10-17T14:23:29.236		R	18.44 ± 0.06
2023-10-18T16:12:25.346		B	20.68 ± 0.15
2023-10-18T16:16:00.356		V	18.13 ± 0.10
2023-10-18T16:19:35.370		R	18.89 ± 0.07
2023-10-19T15:37:25.492		B	20.23 ± 0.10
2023-10-19T15:41:07.493		V	17.62 ± 0.06
2023-10-19T15:45:03.473		R	18.38 ± 0.04
2023-10-20T15:17:30.676		B	20.24 ± 0.13
2023-10-20T15:21:09.646		V	17.71 ± 0.08
2023-10-20T15:24:49.624		R	18.41 ± 0.05
2023-10-21T15:12:50.704		B	19.83 ± 0.15
2023-10-21T15:16:30.683		V	17.77 ± 0.09
2023-10-21T15:20:08.724		R	18.26 ± 0.06
2023-10-22T14:27:55.829		B	20.54 ± 0.16
2023-10-22T14:31:36.818		V	17.87 ± 0.10
2023-10-22T14:35:17.806		R	18.90 ± 0.06
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The further identification is ongoing.