[KSCI] Korea Science Citation Index Service

http://dx.doi.org/10.5140/JASS.2016.33.4.247

Revisiting the Correlations of Peak Luminosity with Spectral Lag and Peak Energy of the Observed Gamma-ray Bursts

Jo, Yun-A (Department of Astronomy and Atmospheric Sciences, Kyungpook National University)
Chang, Heon-Young (Department of Astronomy and Atmospheric Sciences, Kyungpook National University)

Publication Information

Journal of Astronomy and Space Sciences / v.33, no.4, 2016 , pp. 247-256 More about this Journal

Abstract

An analysis of light curves and spectra of observed gamma-ray bursts in gamma-ray ranges is frequently demanded because the prompt emission contains immediate details regarding the central engine of gamma-ray bursts (GRBs). We have revisited the relationship between the collimation-corrected peak luminosity and the spectral lag, investigating the lag-luminosity relationships in great detail by focusing on spectral lags resulting from all possible combinations of channels. Firstly, we compiled the opening angle data and demonstrated that the distribution of opening angles of 205 long GRBs is represented by a double Gaussian function having maxima at ~ 0.1 and ~ 0.3 radians. We confirmed that the peak luminosity and the spectral lag are anti-correlated, both in the observer frame and in the source frame. We found that, in agreement with our previous conclusion, the correlation coefficient improves significantly in the source frame. It should be noted that spectral lags involving channel 2 (25-50 keV) yield high correlation coefficients, where Swift/Burst Alert Telescope (BAT) has four energy channels (channel 1: 15-25 keV, channel 2: 25-50 keV, channel 3: 50-100 keV, channel 4: 100-200 keV). We also found that peak luminosity is positively correlated with peak energy.

Keywords

GRBs; data analysis;

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Times Cited By KSCI : 1 (Citation Analysis)

Reference
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