Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-09-07
Astronomy and Astrophysics
Astrophysics
15 pages including 2 tables and 7 figures, accepted for publication in ApJ
Scientific paper
10.1086/523081
By using recent publicly available observational data obtained in conjunction with the NASA Swift gamma-ray burst 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 seconds 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.
Akerlof Carl W.
Swan Heather F.
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