REVISITING THE LONG/SOFT-SHORT/HARD CLASSIFICATION OF GAMMA-RAY BURSTS IN THE FERMI ERA | |
Zhang, Fu-Wen1,2,3; Shao, Lang4; Yan, Jing-Zhi1,2![]() ![]() | |
刊名 | ASTROPHYSICAL JOURNAL
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2012-05-10 | |
卷号 | 750期号:2页码:88(11pp) |
关键词 | gamma-ray burst: general methods: data analysis |
ISSN号 | 0004-637X |
英文摘要 | We perform a statistical analysis of the temporal and spectral properties of the latest Fermi gamma-ray bursts (GRBs) to revisit the classification of GRBs. We find that the bimodalities of duration and the energy ratio (E-peak/Fluence) and the anti-correlation between spectral hardness (hardness ratio (HR), peak energy, and spectral index) and duration (T-90) support the long/soft-short/hard classification scheme for Fermi GRBs. The HR-T-90 anti-correlation strongly depends on the spectral shape of GRBs and energy bands, and the bursts with the curved spectra in the typical BATSE energy bands show a tighter anti-correlation than those with the power-law spectra in the typical BAT energy bands. This might explain why the HR-T-90 correlation is not evident for those GRB samples detected by instruments like Swift with a narrower/softer energy bandpass. We also analyze the intrinsic energy correlation for the GRBs with measured redshifts and well-defined peak energies. The current sample suggests E-p,E-rest = 2455x(E-iso/10(52))(0.59) for short GRBs, significantly different from that for long GRBs. However, both the long and short GRBs comply with the same E-p,(rest)-L-iso correlation. |
学科主题 | Astronomy & Astrophysics |
WOS标题词 | Science & Technology ; Physical Sciences |
类目[WOS] | Astronomy & Astrophysics |
研究领域[WOS] | Astronomy & Astrophysics |
关键词[WOS] | 1ST 2 YEARS ; GRB 090426 ; E-P,E-I-E-ISO CORRELATION ; LUMINOSITY RELATION ; OPTICAL AFTERGLOWS ; PEAK ENERGY ; HOST GALAXY ; REDSHIFT ; SWIFT ; SPECTRA |
收录类别 | SCI |
语种 | 英语 |
WOS记录号 | WOS:000303446500002 |
公开日期 | 2013-01-31 |
内容类型 | 期刊论文 |
源URL | [http://libir.pmo.ac.cn/handle/332002/8091] ![]() |
专题 | 紫金山天文台_宇宙伽马暴、中子星及相关物理研究团组 |
作者单位 | 1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China 2.Chinese Acad Sci, Key Lab Dark Matter & Space Astron, Nanjing 210008, Peoples R China 3.Guilin Univ Technol, Coll Sci, Guilin 541004, Peoples R China 4.Hebei Normal Univ, Dept Phys, Shijiazhuang 050016, Peoples R China |
推荐引用方式 GB/T 7714 | Zhang, Fu-Wen,Shao, Lang,Yan, Jing-Zhi,et al. REVISITING THE LONG/SOFT-SHORT/HARD CLASSIFICATION OF GAMMA-RAY BURSTS IN THE FERMI ERA[J]. ASTROPHYSICAL JOURNAL,2012,750(2):88(11pp). |
APA | Zhang, Fu-Wen,Shao, Lang,Yan, Jing-Zhi,&Wei, Da-Ming.(2012).REVISITING THE LONG/SOFT-SHORT/HARD CLASSIFICATION OF GAMMA-RAY BURSTS IN THE FERMI ERA.ASTROPHYSICAL JOURNAL,750(2),88(11pp). |
MLA | Zhang, Fu-Wen,et al."REVISITING THE LONG/SOFT-SHORT/HARD CLASSIFICATION OF GAMMA-RAY BURSTS IN THE FERMI ERA".ASTROPHYSICAL JOURNAL 750.2(2012):88(11pp). |
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