Revisiting the Correlations of Peak Luminosity with Spectral Lag and Peak Energy of the Observed Gamma-ray Bursts
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...
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| Format: | Article |
| Language: | English |
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The Korean Space Science Society
2016-12-01
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| Series: | Journal of Astronomy and Space Sciences |
| Subjects: | |
| Online Access: | http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/2016/v33n4/OJOOBS_2016_v33n4_247.pdf |
| _version_ | 1797369982827364352 |
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| author | Yun-A Jo Heon-Young Chang |
| author_facet | Yun-A Jo Heon-Young Chang |
| author_sort | Yun-A Jo |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-08T17:54:50Z |
| format | Article |
| id | doaj.art-f3e61737887741a08a25920a1ecd0a27 |
| institution | Directory Open Access Journal |
| issn | 2093-5587 2093-1409 |
| language | English |
| last_indexed | 2024-03-08T17:54:50Z |
| publishDate | 2016-12-01 |
| publisher | The Korean Space Science Society |
| record_format | Article |
| series | Journal of Astronomy and Space Sciences |
| spelling | doaj.art-f3e61737887741a08a25920a1ecd0a272024-01-02T05:47:39ZengThe Korean Space Science SocietyJournal of Astronomy and Space Sciences2093-55872093-14092016-12-0133424725610.5140/JASS.2016.33.4.247Revisiting the Correlations of Peak Luminosity with Spectral Lag and Peak Energy of the Observed Gamma-ray BurstsYun-A Jo0Heon-Young Chang1Department of Astronomy and Atmospheric Sciences, Kyungpook National University, Daegu 41566, KoreaDepartment of Astronomy and Atmospheric Sciences, Kyungpook National University, Daegu 41566, KoreaAn 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.http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/2016/v33n4/OJOOBS_2016_v33n4_247.pdfGRBs |
| spellingShingle | Yun-A Jo Heon-Young Chang Revisiting the Correlations of Peak Luminosity with Spectral Lag and Peak Energy of the Observed Gamma-ray Bursts Journal of Astronomy and Space Sciences GRBs |
| title | Revisiting the Correlations of Peak Luminosity with Spectral Lag and Peak Energy of the Observed Gamma-ray Bursts |
| title_full | Revisiting the Correlations of Peak Luminosity with Spectral Lag and Peak Energy of the Observed Gamma-ray Bursts |
| title_fullStr | Revisiting the Correlations of Peak Luminosity with Spectral Lag and Peak Energy of the Observed Gamma-ray Bursts |
| title_full_unstemmed | Revisiting the Correlations of Peak Luminosity with Spectral Lag and Peak Energy of the Observed Gamma-ray Bursts |
| title_short | Revisiting the Correlations of Peak Luminosity with Spectral Lag and Peak Energy of the Observed Gamma-ray Bursts |
| title_sort | revisiting the correlations of peak luminosity with spectral lag and peak energy of the observed gamma ray bursts |
| topic | GRBs |
| url | http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/2016/v33n4/OJOOBS_2016_v33n4_247.pdf |
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