Show simple item record

dc.contributor.authorPerna, Rosalba
dc.contributor.authorLoeb, Abraham
dc.date.accessioned2019-09-24T12:03:57Z
dc.date.issued1998
dc.identifier.citationPerna, Rosalba, and Abraham Loeb. 1998. “Constraining the Beaming of Gamma-Ray Bursts with Radio Surveys.” The Astrophysical Journal 509 (2): L85–88. https://doi.org/10.1086/311784.
dc.identifier.issn0004-637X
dc.identifier.issn1538-4357
dc.identifier.urihttp://nrs.harvard.edu/urn-3:HUL.InstRepos:41393210*
dc.description.abstractThe degree of beaming in gamma-ray bursts (GRBs) is currently unknown. The uncertainty in the gamma-ray-beaming angle, theta(b), leaves the total energy release (proportional to theta(b)(2)) and the event rate per galaxy (proportional to theta(b)(-2)) unknown to within orders of magnitude. Since the delayed radio emission of GRB sources originates from a mildly relativistic shock and receives only weak relativistic beaming, the rate of radio-selected transients with no GRB counterparts can be used to set an upper limit on theta(b)(-2). We find that a VLA survey with a sensitivity of similar to 0.1 mJy at 10 GHz could identify greater than or similar to 2 x 10(4) (theta(b)/10 degrees)(-2) radio afterglows across the sky if each source is sampled at least twice over a period of 1 month or longer. From the total number of greater than or similar to 0.1 mJy sources observed at 8.44 GHz and the fraction of fading sources at 1.44 GHz, we get the crude limit theta(b) greater than or similar to 6 degrees.
dc.language.isoen_US
dc.publisherAmerican Astronomical Society
dash.licenseLAA
dc.titleConstraining the Beaming of Gamma-Ray Bursts with Radio Surveys
dc.typeJournal Article
dc.description.versionVersion of Record
dc.relation.journalThe Astrophysical Journal
dash.depositing.authorLoeb, Abraham::9975df1f269ab49c1ad5a328a1ec1476::600
dc.date.available2019-09-24T12:03:57Z
dash.workflow.comments1Science Serial ID 95334
dc.identifier.doi10.1086/311784
dash.source.volume509;2
dash.source.pageL85-L88


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record