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- W2475428187 abstract "We argue the possibility to improve the statistical significance of fundamental plane of long gammaray bursts (LGRBs), which is a correlation between the spectral peak energy Ep, the luminosity time TL (� Eiso/Lp where Eiso is isotropic energy) and the peak luminosity Lp, using the morphology of cumulative light curve of the prompt emission. We parametrize the morphology by the absolute deviation from constant luminosity (ADCL) and derive the value for 40 LGRBs which have spectropic redshifts, spectral parameters determined by the Band model, 1-second peak fluxes, fluences, and 64 msec resolution light curves whose peak counts are 10 times larger than background fluctuations. We find that the correlations for GRBs with small and large ADCL (ADCL 0.17, respectively) are statistically more significant compared with one derived from all samples and are given by Lp = 10 52.51±0.02 (Ep/10 2.71 keV) 1.86±0.03 (TL/10 0.86 sec) 0.35±0.09 with � 2 = 14.87/18 and Lp = 10 52.93±0.04 (Ep/10 2.71 keV) 1.76±0.05 (TL/10 0.86 sec) 0.71±0.17 with � 2 = 7.21/9, respectively. This fact implies the existence of subclasses of LGRBs characterized by the value of ADCL. Also there is a hint for the existence of the intermediate-ADCL class which deviates from both fundamental planes. Because both relations are so tight that our result provides a new accurate distance measurement scheme up to the high redshift universe." @default.
- W2475428187 created "2016-08-23" @default.
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- W2475428187 date "2012-01-13" @default.
- W2475428187 modified "2023-09-27" @default.
- W2475428187 title "Improvement of Fundamental Plane of Long Gamma-Ray Bursts with cumulative light curve Morphology" @default.
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