{
  "createdOn": 1701929894402,
  "body": "Yanting Zhang, Shaolin Xiong, Yue Huang, Shuo Xiao, Xiaoyun Zhao, Ping Wang, \nreport on behalf of the GECAM team:\n\nThe short burst, GRB 231206A, has been detected by GECAM-B (Liu et al., GCN 35283) and INTEGRAL/SPI-ACS. \nWith the ETJASMIN pipeline (Energetic Transients joint analysis system for Multi-INstrument, Xiao et al.,\nMNRAS, 514, 2397, 2022) and the data of GECAM-B and INTEGRAL/SPI-ACS, we did a joint location for this burst.\n\nFirstly, we applied the Li-CCF method (Xiao et al., ApJ, 920, 43, 2021) to the high \ntemporal resolution (~0.1 ms) light curve of GECAM-B and the low-latency public 50 ms \nlight curve of INTEGRAL/SPI-ACS, and derived the triangulation location as the following annuli:\n\n--------------------------------------------------------------------------------------------------\nAnnulus                 Ra (deg)      Dec (deg)     Radius (deg)      Radius-Error (deg, 3sigma)\nGECAM-B + SPI-ACS       37.933        78.224        103.958           47.522\n--------------------------------------------------------------------------------------------------\n\nThen, we combined this triangulation location, the stand-alone location provided by GECAM-B \n(Liu et al., GCN 35283), as well as the Earth occultation of these instruments, \nand derived a refined location, which is much smaller than the stand-alone ones. \n\nThe center (highest probability) of this refined location is:\n\n--------------------------------------\n            RA (deg)      Dec (deg)\nCenter      314.648\t  -20.742   \n--------------------------------------\n\nThe 1-simga region of this refined location is about 295 deg^2. \n\nThe sky map and probability healpix data of this refined location could be found at:\nSky map: http://twiki.ihep.ac.cn/pub/GECAM/GRBList/GRB231206-jointLoc-skymap-v01.png\nData file: http://twiki.ihep.ac.cn/pub/GECAM/GRBList/GRB231206A-jointLoc-healpix-v01.fits\n\nNote that a part of the location region is below the Earth limb of GECAM-B and thus excluded.\n\nThis location may be improved.\n\nETJASMIN is developed for joint observation of high energy transients by the GECAM team.\nWe acknowledge the public data of INTEGRAL/SPI-ACS. ",
  "submittedHow": "web",
  "bibcode": "2023GCN.35300....1Z",
  "circularId": 35300,
  "subject": "GRB 231206A: joint location of multiple instruments by ETJASMIN",
  "submitter": "yqzhang_cl@163.com",
  "eventId": "GRB 231206A"
}