{
  "bibcode": "2022GCN.32976....1Q",
  "body": "R. Querrard (UVI), P. Gokuldass (Florida Institute of Technology), N.\nOrange (OrangeWave Innovative Science, LLC), K. Noonan (UVI), K. Smith\n(UVI), D. Morris (UVI) report:\n\nWe observed the field of GRB221120A (R. A. J. Eyles-Ferris et al., GCN\n32955) with the 0.5m Virgin Island Robotic Telescope (VIRT) at the\nUniversity of the Virgin Islands' Etelman observatory on 11-21-2022\nstarting at 01:20:09 UT (T+3.8 hrs). We performed a series of exposures in\nthe R filter with a total exposure of 4000 s. The weather conditions were\n\npartly cloudy to cloudy during the hours of observation with an average\nairmass of 1.1.\n\nWe detect no new source within the enhanced XRT position error circle (Goad\net al., GCNC 32962) consistent with other non-detections (Swain et al., GCN\n32956, O'Connor\n\net al., GCN 32957, Leonini et al. GCN 32961, Gompertz et al, GCN 32966; and\nOdeh et al., GCN 32968) and report the following 5-sigma upper limit:\n\nT_mid            ||Exposure     ||Filter      ||Limit\n\nT+ 4.3  hrs     ||4000s          ||R            ||>20.34\n\nThe limit is estimated from comparison to nearby USNO B1 stars and is not\ncorrected for Galactic extinction. The VIRT is still in the commissioning\nphase.\n\nWe acknowledge financial support from NASA MUREP MIRO award 80NSSC21M0001,\nNASA EPSCoR award 80NSSC22M0063, and NSF EiR award 1901296. R.Q. and N.B.O.\nalso acknowledge financial support from South Carolina Space Grant award\n80NSSC20M0054. This message can be cited.",
  "circularId": 32976,
  "createdOn": 1669229714000,
  "email": "priyadass.94@gmail.com",
  "subject": "GRB 221120A: VIRT Optical Upper Limit",
  "submitter": "Priyadarshini Gokuldass at U. of the Virgin Islands  <priyadass.94@gmail.com>",
  "eventId": "GRB 221120A"
}