GALACTIC EXTINCTION FROM COLORS AND COUNTS OF FIELD GALAXIES IN WFPC2 FRAMES: An Application to GRB 970228

Abstract

We develop the “simulated extinction method” to measure average foreground Galactic extinction from field galaxy number-counts and colors. The method comprises simulating extinction in suitable reference fields by changing the isophotal detection limit. This procedure takes into account selection effects, in particular, the change in isophotal detection… (More)

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