{
  "bibcode": "2005GCN..3392....1B",
  "body": "J. Bloom (UCB), C. Blake (Harvard), J. X. Prochaska (UCSC), J. Hennawi\n(UCB), M. Gladders (Carnegie), B. Koester (U Michigan) and H. W. Chen\n(MIT) report:\n\nConnecting a WIYN 600s Sloan r band image to compact astrometric sources\nin the 2MASS catalogue we find the following refined position for the\nputative host (Bloom et al. GCN #3386) at redshift z=0.226 (Prochaska et\nal. GCN #3390) and counterpart (Bloom et al. GCN #3388):\n\n        galaxy:  RA = 12:36:12.87, Dec = 28:58:58.5\n   counterpart:  RA = 12:36:13.67, Dec = 28:58:57.0\n\n(J2000; absolute uncertainty of 200 milliarcsec in each direction). The\nproposed counterpart is thus 1.51\" S, 10.41\" E from the galaxy and 1.61\"\nS, 0.88\" E of the XRT position (Kenea et al. #3383). This distance of 1.84\narcsec is well within the astrometric uncertainty of the XRT position. The\nposition reported here is consistent with that reported in Cenko et al.\nGCN #3391.\n\nAnother zoom in image is now posted at:\n  http://astro.berkeley.edu/~jbloom/grb050509b-zoom.ps\n  http://astro.berkeley.edu/~jbloom/grb050509b-zoom.gif\n\nThis message may be cited.",
  "circularId": 3392,
  "createdOn": 1115637167000,
  "email": "jbloom@cfa.harvard.edu",
  "subject": "GRB 050509b: Precision Astrometry",
  "submitter": "Josh Bloom at Harvard/CFA  <jbloom@cfa.harvard.edu>",
  "eventId": "GRB 050509B"
}