{
  "bibcode": "2020GCN.27176....1S",
  "body": "A. Sota, E. Fernandez-Garcia, Y.-D. Hu and A. J. Castro-Tirado \n(IAA-CSIC), A. Castellon, I. Carrasco-Garcia and C. Perez del Pulgar \n(UMA), on behalf of a larger collaboration, report:\n\nFollowing the detection of GRB 200224A by Swift (Ukwatta�� et al., GCNC \n27173), the 0.3cm robotic telescope at the BOOTES-1 astronomical station \nat INTA-CEDEA in Huelva (Spain) started gathering images at 03:26:27 UT, \n40s after the alert and 118s after the onset of the burst. No optical \ntransient is detected in the single images with a limiting magnitude of \n14 (consistent with the MASTER upper limit, Lipunov et al., GCNC 27172). \nFurther data reduction is ongoing.\n\nDeeper exposures were obtained with the 1.5m telescope at Observatorio \nde Sierra Nevada starting at 05:35 UT (i.e. 2.1 h post burst).�� We find \nan optical source consistent with the Swift/XRT position,�� at \ncoordinates (RA & Dec, J2000)�� = 16:35:04.11 +41:36:42 (+/- 1���). The \npreliminary magnitude is R = 22. Further observations are planned to \nconfirm whether this is the optical afterglow to GRB 200224A.\n\nThis message can be quoted.\n\n[GCN OPS NOTE(24feb20): This is the fifth Circular in the sequence of 8 circulars\nwhich were all labeled A because of the sequence assigner being offline.  \nThis circular was correctly labelled A.]",
  "circularId": 27176,
  "createdOn": 1582526244000,
  "email": "ajct@iaa.es",
  "subject": "GRB 200224A: BOOTES-1 and 1.5m OSN optical observations",
  "submitter": "Alberto J. Castro-Tirado at IAA-CSIC  <ajct@iaa.es>",
  "eventId": "GRB 200224A"
}