TITLE: GCN GRB OBSERVATION REPORT NUMBER: 1092 SUBJECT: GRB001109, Host Galaxy Astrometry DATE: 01/09/11 08:19:24 GMT FROM: Vladimir Sokolov at SAO RAS V. Sokolov, T. Fatkhullin, V. Komarova (SAO RAS) report: "Using the images obtained on July 24, 2001 (GCN #1090), we performed the astrometry to reveal where the VLA radiosource (Taylor et al. GCN #880; RA = 18h30m06.51s, DEC = 55d18'35.7", equinox J2000) has been placed. We used 10 USNO stars not saturated on the images and the astrometrical uncertainty is found to be about 0.5 arcsec, including statistic and systematic errors. The astrometry showed that radiosource is placed on the West outskirt of the brighter component A (GCN #1090). If the VLA radiosource is indeed located in this galaxy and related to GRB 001109 than the redshift of the GRB event is 0.398 +/- 0.002 (see GCN #1090). The image can be seen at http://www.sao.ru/~sokolov/GRB/HOSTS/GRB001109/GRB001109.html This message can be cited".