{
  "format": "text/plain",
  "body": "T. Komesh (NU), Z. Abdullayev (NU), Z. Maksut (NU), D. Berdikhan (NU), B. Grossan (UCB, NU),  M. Krugov (FAI) and E. Abdikamalov (NU) report on behalf of the Energetic Cosmos Laboratory:\n\nThe Nazarbayev University Transient Telescope at Assy-Turgen Astrophysical Observatory (NUTTelA-TAO) pointed at EP250302a on receipt of an automated GCN / EP position alert, observing in Sloan g' and r' bands, with the Burst Simultaneous Three-Channel Imager (BSTI; Grossan, Kumar & Smoot 2019, JHEA, 32, 14).\n\nWe started observations at 15:42:43 UT on 2025-03-02, 399 seconds after the Einstein Probe trigger (Dai et al., GCN 39556). Observations were made in partially cloudy conditions. A new and changing source consistent with the XRT position (Page et al., GCN 38761) was detected. We report the following photometric values for the optical transient: \n\ntc-t0(s)    g'(mag) err   r'(mag) err  exposure_time (s)\n--------------------------------------------------------------\n424        -               18.36 0.08     50  \n628        -               18.35 0.08     300                  \n928        -               18.80 0.13     300                  \n1273       -               18.76 0.07     240                  \n1513       -               18.55 0.06     240                  \n1753       -               18.12 0.04     240                  \n1993       -               17.71 0.03     240                  \n2233       -               17.58 0.02     240                  \n2686       -               17.48 0.03     240                  \n2926       -               17.54 0.02     240                  \n3166       -               17.58 0.02     240                  \n3406       -               17.65 0.02     240                  \n3646       -               17.68 0.03     240                  \n3886       -               17.73 0.03     240                  \n4126       -               17.85 0.03     240                  \n4366       -               17.88 0.04     240                  \n4606       -               17.95 0.03     240                  \n4846       -               18.08 0.04     240                  \n5086       -               18.11 0.03     240                  \n5326       -               18.18 0.04     240                  \n5566       -               18.32 0.04     240                  \n5806       -               18.47 0.04     240                  \n6046       -               18.56 0.04     240                  \n6348       18.93 0.05      18.56 0.04     240                   \n6588       18.99 0.06      18.76 0.04     240                   \n6828       19.01 0.05      18.86 0.05     240                   \n7068       19.05 0.05      18.86 0.05     240                   \n7308       19.06 0.05      18.90 0.05     240                   \n7548       19.12 0.05      18.94 0.05     240                   \n7788       19.28 0.07      19.01 0.06     240                   \n8028       19.43 0.08      19.01 0.06     240                   \n8269       19.53 0.08      19.19 0.07     240                   \n8509       19.34 0.06      19.19 0.06     240         \n\n\ntc-t0 = trigger time minus image center time. Calibration was done with 4 bright Pan-STARRS catalog stars on our images. \n\nOur results are in agreement with those reported in previously published circulars (Zhu et. al, GCN 39550; Wu et. al, GCN 39555; Xin et. al, GCN 39558; Pankov et al., GCN 39565).\n\nWe caution the reader that these are preliminary results, without color or other corrections, and will likely change in small measure. Please also note that times are approximate.\n\n\n----------------------------------\nNU = Nazarbayev University, Astana, Kazakhstan\nUCB = University of California, Berkeley, USA\nFAI = Fesenkov Astrophysical Institute, Kazakhstan\n\nThis research has been funded by the Science Committee of the Ministry of Science and Higher Education of the Republic of Kazakhstan (Grant No. AP26103591). The NUTTelA-TAO Team acknowledges the support of the staff of the Assy-Turgen Astrophysical Observatory, Almaty, Kazakhstan, and the Fesenkov Astrophysical Institute, Almaty, Kazkhstan.\n",
  "circularId": 39569,
  "subject": "EP250302a: NUTTelA-TAO Early Measurments",
  "bibcode": "2025GCN.39569....1K",
  "submitter": "Toktarkhan Komesh at Nazarbayev University <toktarkhan.komesh@nu.edu.kz>",
  "submittedHow": "web",
  "createdOn": 1741004303540,
  "eventId": "EP250302a"
}