{
  "eventId": "EP260416a",
  "submitter": "Martin Jelinek at Astro.Inst-AVCR,Ondrejov <martin.jelinek@asu.cas.cz>",
  "circularId": 44341,
  "body": "M. Jelinek, J. Strobl, F. Novotny, A. Malenakova and R. Hudec\n(ASU CAS Ondrejov, CZ) report:                                                         \n\t\t\t\t\t\t\t\t\t\nWe observed the field of EP260416a (Hu et al., GCN 44307) with\nthe 50 cm robotic telescope (D50) of the Astronomical\nInstitute Ondrejov, near Prague, Czech Republic. We obtained \na series of 120 s Sloan-r band exposures starting at 20:09 UT \non 2026 April 17, i.e.  38.66 h after the initial trigger, and\ncombined 68 frames with a mean exposure time of 40.03 h after\nthe trigger.\n\nThe optical counterpart (Ducoin et al., GCN 44310; Li et al.,\nGCN 44315; Hua et al., GCN 44318; Lee et al., GCN 44319; Zheng\net al., GCN 44321; Martin-Carrillo et al., GCN 44328; Li et\nal., GCN 44334) is detected in the combined image. \n\nThe preliminary AB magnitude of the object is r = 21.08 +/-\n0.23, calibrated against the ATLAS catalog and not corrected\nfor Galactic extinction.\n\t\t\t\t\t\t\t\t\t\nOur measurement is consistent with the continued fading of the\nafterglow.\n\n",
  "submittedHow": "email",
  "subject": "EP260416a: Ondrejov D50 optical detection",
  "createdOn": 1776541927082
}