{
  "bibcode": "2019GCN.25999....1S",
  "body": "R. Strausbaugh (U. of the Virgin Islands), A. Cucchiara (U. of the Virgin Islands/College of Marin) report on behalf of a larger collaboration:\n\nWe observed Fermi GRB 191011A (Fermi GBM Team at MSFC/Fermi-GBM, GCN 25987) with\nthe LCO 1-m Sinistro instrument at the Cerro Tololo site on October 11, from 04:54 to 05:18 UT\n(corresponding to 0.13 to 0.4 hours from the GRB trigger time)\nwith the Bessel I filter.\n\nWe performed a series of 5x120s exposures.  While we do not detect a source in individual frames, we do detect a source in co-added frames that is not present in either USNO-B1.0 or 2MASS surveys that is consistent with the optical afterglow location (Palmer et al., GCN 25988) with the following magnitude:\n\nI = 18.81 +/- 0.13\n\nThis flux is calibrated against several USNO-B1.0 objects near the GRB location but is not corrected for Galactic Extinction.\n\nThese observations were possible thanks to the USVI NASA-EPSCoR\nResearch Infrastructure Development (RID) grant NNX16AL44A.",
  "circularId": 25999,
  "createdOn": 1570801975000,
  "email": "robert.strausbaugh@uvi.edu",
  "subject": "GRB 19011A: Optical Afterglow Detection with LCO",
  "submitter": "Robert Strausbaugh at U. of the Virgin Islands  <robert.strausbaugh@uvi.edu>"
}