{
  "bibcode": "2003GCN..2031....1O",
  "body": "E. O. Ofek, A. Gal-Yam, Y. Lipkin, K. Sharon and E. Medezinski \n(Wise observatory, TAU) report:\n\nWe searched for archival CONCAM (www.concam.net) images \ncovering the trigger time of GRB 030329 (March 29, 11:37:14, \nRicker et al. GCN 1997). This part of the night was covered by \nCONCAM units at Kitt Peak and Mount Wilson Observatories. \nUnfortunately, CONCAM images for that night from Mauna Kea \nObservatory in Hawaii are uavailable on the net.\n\nCONCAM images covering the exact time of the GRB\ntrigger do not appear in the web archives of both sites (Kitt\nPeak and Mount Wilson). We were therefore limited to the analysis \nof images taken a few minutes before and after the GRB.\nWe could not detect an OT to a conservative limiting magnitude of 3.5.\n\nThe Kitt peak images are superior: four 180 s CONCAM images, \ntaken at Mar 29, 11:29:57, 11:33:52, 11:41:46 and 11:45:42 UT\nwere searched. The magnitude limit is shallow as the GRB \nlocation was near the horizon at Keat Peak. \n\nIf the instantaneous optical display associated with GRB 030329 \n(z=0.1685, Greiner et al. GCN 2020) had been similar to that of GRB 990123 \n(z=1.6), which peaked above mag 9, then after appropriate scaling \nby the luminosity distance (for a flat Universe with omega=0.3, \nneglecting effects of extinction), we would expect GRB 030329 \nto be ~240 times brighter than GRB 990123. This means that an\noptical source with mag ~3 should have been apparent on \ncontemporaneous CONCAM images.",
  "circularId": 2031,
  "createdOn": 1049060066000,
  "email": "avishay@wise1.tau.ac.il",
  "subject": "GRB030329 - near contemporaneous optical limits from CONCAM",
  "submitter": "Avishay Gal-Yam at Tel Aviv U, Israel  <avishay@wise1.tau.ac.il>",
  "eventId": "GRB 030329"
}