We present an analysis of BV R c I c observations of the field sized around 4' × 4' centered at the host galaxy of the gamma-ray burst GRB021004 with the 6-m BTA telescope of the Special Astrophysical Observatory of the Russian Academy of Sciences. We measured the magnitudes and constructed the color diagrams for 311 galaxies detected in the field (S/N>3). The differential and integral counts of galaxies up to the limit, corresponding to 28.5 ( B), 28.0 ( V), 27.0 ( R c ), 26.5 ( I c ) were computed. We compiled the galaxy catalog, consisting of 183 objects, for which the photometric redshifts up to the limiting magnitudes 26.0 ( B), 25.5 ( V), 25.0 ( R c ), 24.5 ( I c ) were determined using the HyperZ code. We then examined the radial distribution of galaxies based on the z estimates. We have built the curves expected in the case of a uniform distribution of galaxies in space, and obtained the estimates for the size and contrast of the possible super-large-scale structures, which are accessible with the observations of this type.
- Pub Date:
- October 2010
- gamma-ray burst: individual;
- Astrophysics - Cosmology and Extragalactic Astrophysics
- 15 pages, 7 figures, 2 tables, to be published in Astrophysical Bulletin 65, 311-325 (2010)