{
  "bibcode": "2003GCN..1905....1W",
  "body": "W. M. Wood-Vasey, Lawrence Berkeley National Laboratory, using images\nobtained by R. Bambery, S. Pravdo, M. Hicks, and K. Lawrence\n(Near-Earth Asteroid Tracking project, Jet Propulsion Laboratory),\nreports upper limits for previous observations at the location of the\nobject identified by Price et al. (GCN 1880) as the optical\ncounterpart to GRB 20030226 from unfiltered observations with the\nOschin 48\" telescope at Palomar Observatory.\n\nA co-addition of images from 2003 February 21.53, 21.54, and 21.55\nshows no source visible at this location to a limiting unfiltered\nmagnitude of 21.3 (calibrated to USNO R-band stars on the image frame)\nat a S/N of 3.\n\nA co-addition of 9 images from 2002 March 31, 2003 January 19, \nand 2003 February 21 shows no source visible at this location \nto a limiting unfiltered magnitude of 21.6 (calibrated to USNO\nR-band stars on the image frame) at a S/N of 3.\n\nThe full co-added of all 9 images is available at \n\nhttp://supernova.lbl.gov/~wwoodvas/GRB/#GRB20030226\n\nAll dates UT.\n\nThis message may be cited.",
  "circularId": 1905,
  "createdOn": 1046397666000,
  "email": "wmwood-vasey@lbl.gov",
  "subject": "GRB 20030226: Upper limits from recent and historical observations",
  "submitter": "Michael Wood-Vasey at UC Berkeley/LBNL/SNfactory  <wmwood-vasey@lbl.gov>",
  "eventId": "GRB 200302"
}