GCN Circular 37939
Subject
GRB 241029A: Mephisto observations
Date
2024-10-29T14:28:59Z (25 days ago)
From
Brajesh Kumar at SWIFAR, YNU <brajesh@ynu.edu.cn>
Via
Web form
Weikang Lin (SWIFAR, YNU), Guowang Du (SWIFAR, YNU), Brajesh Kumar (SWIFAR, YNU), Yangwei Zhang (SWIFAR, YNU), Tao Wang (SWIFAR, YNU), Xian-ao Wang (SWIFAR, YNU), Yaosong Yu (SWIFAR, YNU), Yu Pan (SWIFAR, YNU), Xingzhu Zou (SWIFAR, YNU), Xinlei Chen (SWIFAR, YNU), Jinghua Zhang (SWIFAR, YNU), Yuanpei Yang (SWIFAR, YNU), Yuan Fang (SWIFAR, YNU), Yehao Cheng (SWIFAR, YNU), Chenxu Liu (SWIFAR, YNU), Xuhui Han (NAOC), Pinpin Zhang (NAOC), Liping Xin (NAOC), Chao Wu (NAOC), Xiangkun Liu (SWIFAR, YNU), Xiaowei Liu (SWIFAR, YNU) report on behalf of the Mephisto Team:
The 1.6m Multi-channel Photometric Survey Telescope (Mephisto) of Yunnan University located at Lijiang Observatory was triggered to observe the field of GRB 241029A detected by Fermi/GBM (Fermi GBM team, GCN 37932), SVOM/ECLAIRs and SVOM/GRM (Schanne et al., GCN 37934; Wang et al., GCN 37935). Several uvgriz-band images were acquired starting from 11:47:29 2024-10-29 UT. We clearly detect the uncatalogued source reported by Jiang et al. (GCN 37937) in 300s of r band images and the preliminary estimated magnitude is 20.47+- 0.11 (r-band, 12:19:27 2024-10-29 UT). Further analysis is in progress.
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Mephisto (Multi-channel Photometric Survey Telescope) is a 1.6m wide-field multi-channel telescope, the first of its type in the world, capable of imaging the same field of view in three optical bands simultaneously. It provides real-time, high-quality colors of stellar objects. The on-site telescope assemblage and commissioning were carried out in September 2022. The first light in all three channels was achieved on 2023 December 21.
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