Are GRB optical afterglows relatively brighter at high z?

Details Are GRB optical afterglows relatively brighter at high z? Are GRB optical afterglows relatively brighter at high z?

2009-08-04

arxiv.org/abs/0908.0410v1

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

5 pages, 3 figures, 1 table

Scientific paper

The redshift distribution of gamma-ray bursts (GRBs) is strongly biased by selection effects. We investigate, via Monte Carlo simulations, one possible selection effect that may be modifying the Swift GRB redshift distribution. We show how telescope response times to acquire a GRB redshift may, via the Malmquist effect and GRB optical afterglow brightness distribution, introduce a bias into the average of the observed redshift distribution. It is difficult to reconcile a recently reported correlated trend between telescope response time and average redshifts unless we employ a redshift-dependent optical afterglow distribution. Simulations of this selection effect suggest that GRB optical afterglows may have been either intrinsically brighter early in the Universe or suffered less local host galaxy extinction.

Affiliated with

Also associated with

No associations

Rating

Are GRB optical afterglows relatively brighter at high z? does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Are GRB optical afterglows relatively brighter at high z?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Are GRB optical afterglows relatively brighter at high z? will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-556799