Time Dilation of BATSE Gamma‐Ray Bursts | Zendy

Theodore T. Lee | Zendy; V. Petrosian | Zendy

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Time Dilation of BATSE Gamma‐Ray Bursts

Author(s) -

Theodore T. Lee,

V. Petrosian

Publication year - 1997

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/303458

Subject(s) - time dilation , limiting , astrophysics , correlation , physics , duration (music) , nonparametric statistics , gamma ray burst , dilation (metric space) , brightness , statistical physics , statistics , mathematics , optics , theoretical physics , mechanical engineering , theory of relativity , geometry , acoustics , engineering , combinatorics

We perform several nonparametric correlation tests on the BATSE 3B data tosearch for evidence of cosmological time dilation. These tests account for theeffects of data truncation due to threshold effects in both limiting brightnessand limiting duration, enabling us to utilize a larger number of bursts than inprevious analyses. We find little significant evidence for correlation betweenvarious measures of peak intensity and duration, but the tests cannotconclusively rule out time dilation factors of 2 or less without more data.There is stronger evidence for a positive correlation between fluence andduration, which if confirmed would rule out simple no-evolution cosmologicalmodels unless there is a strong intrinsic correlation between the total radiantenergy and the duration of bursts.

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