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2007ApJ...671.1868A - Astrophys. J., 671, 1868-1876 (2007/December-3)

An estimation of the gamma-ray burst afterglow apparent optical brightness distribution function.

AKERLOF C.W. and SWAN H.F.

Abstract (from CDS):

By using recent publicly available observational data obtained in conjunction with the NASA Swift gamma-ray burst (GRB) mission and a novel data analysis technique, we have been able to make some rough estimates of the GRB afterglow apparent optical brightness distribution function. The results suggest that 71% of all burst afterglows have optical magnitudes with mR<22.1 at 1000 s after the burst onset, the dimmest detected object in the data sample. There is a strong indication that the apparent optical magnitude distribution function peaks at mR~19.5. Such estimates may prove useful in guiding future plans to improve GRB counterpart observation programs. The employed numerical techniques might find application in a variety of other data analysis problems in which the intrinsic distributions must be inferred from a heterogeneous sample.

Abstract Copyright:

Journal keyword(s): Gamma Rays: Bursts - Methods: Statistical

Simbad objects: 113

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