{
  "bibcode": "2000GCN...821....1K",
  "body": "Naoto Kobayashi, Miwa Goto, Hiroshi Terada, Daigo Tomono\n(Subaru Telescope, National Astronomical Observatory of Japan),\nreported on behalf of SUBARU Telescope team and SUBARU IRCS team\n\n\nOn 29 Sept, 5:20-6:00 UT (29.24 UT), we have obtained 1800-sec K'\nimage of the field around the proposed optical transient (OT) of\nGRB000926 (GCNC #803, Gorosabel et al.). We used the Subaru 8.2m\nTelescope atop Mauna kea with a near-infrared camera and spectrograph\n(IRCS) during its second engineering run. The candidate OT was clearly\ndetected in our image.\n\n  http://www.SubaruTelescope.org/Latestnews/200010/GRB/grb000926.jpg\n\nSeeing was about 0\".7 in the K'-band. No associated host galaxy was\ndetected in our image. Since we did not have time to observe\nstandards, here we just show the relative magnitudes of the OT to a\nnumber of field stars:\n\n\n             relative       relative\n             position      K'-magnitude\n              to OT\n     OT                    0.00 +- 0.04\n   StarA     42\"E         -0.45 +- 0.03\n   StarB     30\"E,34\"S    -2.06 +- 0.01\n   StarC     32\"W         -0.80 +- 0.03\n\nAssuming a probable V-K color of StarB (US170412+514636,\nR=18.6,B=20.9), we have estimated rough K'-magnitude of the OT at\nabout K'=19 mag.\n\n\nWe have also uploaded the co-added fits image on the same web site\nshown above.\n\n  http://www.SubaruTelescope.org/Latestnews/200010/GRB/grb000926.fits\n\nPlease feel free to use it for detailed photometry if you have\nany information on K'-magnitudes of the field stars. The original\npixel scale of our image is 0.058 arcsec/pix, but the posted image is\nbinned by 4-pix and the resultant pixel scale should be 0.233\narcsec/pix. North is to the top, East is to the left. \n\n\nThis message is quotable in publications.",
  "circularId": 821,
  "createdOn": 970299428000,
  "email": "naoto@naoj.org",
  "subject": "GRB000926 K'-band Observation",
  "submitter": "Naoto Kobayashi at SUBARU, NAOJ  <naoto@naoj.org>",
  "eventId": "GRB 000926"
}