That groups of apparently faint GRBs are detected as having longer durations than groups of apparently bright GRBs is well known, and is sometimes referred to as “time dilation.” Reasons for GRB time‐dilation remain ambiguous, and likely convolve intrinsic effects, cosmological effects, and even detector threshold effects. With redshifts of a significant number of GRBs now in hand, attempts at an accurate deconvolution are now possible, and carry interesting cosmological implications. Toward this goal, we use redshift estimates of a large subset of BATSE GRBs obtained by Band et al. (2004) from the lag‐luminosity relation of Norris et al. (2000). Inspection of different sets of GRBs separated in estimated redshift appear to qualitatively show the expected time‐dilation effect, indicating that cosmological information was and is convolved in GRB BATSE data.
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25 May 2009
GAMMA‐RAY BURST: Sixth Huntsville Symposium
20–23 October 2008
Huntsville (Alabama)
Research Article|
May 25 2009
What Causes GRB Time Dilation?
Robert Nemiroff;
Robert Nemiroff
aDepartment of Physics, Michigan Technological University
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Amir Shahmoradi
Amir Shahmoradi
aDepartment of Physics, Michigan Technological University
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AIP Conf. Proc. 1133, 323–327 (2009)
Citation
Robert Nemiroff, Amir Shahmoradi; What Causes GRB Time Dilation?. AIP Conf. Proc. 25 May 2009; 1133 (1): 323–327. https://doi.org/10.1063/1.3155911
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