The gamma-ray burst variability-peak luminosity correlation: new results
نویسندگان
چکیده
منابع مشابه
Testing the gamma-ray burst variability/peak luminosity correlation on a Swift homogeneous sample
We test the gamma-ray burst correlation between temporal variability and peak luminosity of the γ-ray profile on a homogeneous sample of 36 Swift/BAT GRBs with firm redshift determination. This is the first time that this correlation can be tested on a homogeneous data sample. The correlation is confirmed, as long as the 6 GRBs with low luminosity (< 5× 10 erg s in the rest-frame 100-1000 keV e...
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A new procedure for smoothing a gamma-ray burst (GRB) lightcurve and calculating its variability is presented. Applying the procedure to a sample of 25 long GRBs, we have obtained a very tight correlation between the variability and the peak luminosity. The only significant outlier in the sample is GRB 030329. With this outlier excluded, the data scatter is reduced by a factor of ∼ 3 compared t...
متن کاملExplaining the Gamma Ray Burst Lag/luminosity and Variability/luminosity Relations
Two different luminosity indicators have been recently proposed for Gamma Ray Bursts that use the lag between light curve peaks with hard and soft photons as well as the variability (’spikiness’) of the burst light curve. Schaefer, Deng, & Band have proven that both of these luminosity indicators are valid by finding a lag/variability relation for 112 BATSE bursts. Here, I provide simple and ge...
متن کاملLuminosity Functions of Gamma-Ray Burst Afterglows
Aims. Use the standard fireball model to create virtual populations of gamma-ray burst afterglows and study their luminosity functions. Methods. We randomly vary the parameters of the standard fireball model to create virtual populations of afterglows. We use the luminosity of each burst at an observer’s time of 1 day to create a luminosity function and compare our results with available observ...
متن کاملCalibration of Gamma-Ray Burst Luminosity Indicators
Several gamma-ray burst (GRB) luminosity indicators have been proposed, which can be generally written in the form of L̂ = c ∏ x ai i , where c is the coefficient, xi is the i-th observable, and ai is its corresponding power-law index. Unlike Type-Ia supernovae, calibration of GRB luminosity indicators using a low-redshift sample is difficult. This is because the GRB rate drops rapidly at low re...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2005
ISSN: 0035-8711,1365-2966
DOI: 10.1111/j.1365-2966.2005.09450.x