English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We summarize our model for long-duration gamma ray bursts (GRBs) that fitsthe redshift (z) distributions measured with Swift and missions before Swift,and the pre-Swift GRB jet opening-angle distribution inferred from achromaticbreaks in the optical light curves. We find that the comoving rate density ofGRB sources exhibits positive evolution to $z \gtrsim 3$ -- 5, whereas the starformation rate inferred from measurements of the blue and UV luminosity densitypeaks at $z\sim 1$ -- 3. The mean intrinsic beaming factor of GRBs is found tobe $\approx 34$ -- 42, and we predict that the mean GRB optical jet openinghalf-angle measured with Swift is $\approx 10^\circ$. We estimate the number ofGRBs per year that GLAST is expected to observe based on ratios of BATSE andEGRET GRB fluences.Comment: 2 pages; 1 figure; 1st GLAST Symposium, Palo Alto, California,  February 5-8, 2007. Submitted for publication with the Conference  Proceedings, AI

Gamma Ray Bursts in the Swift and GLAST Era