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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; Wei, Da-Ming1,2
2012-05-10
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume750Issue:2Pages:88(11pp)
AbstractWe 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.
KeywordGamma-ray Burst: General Methods: Data Analysis
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1088/0004-637X/750/2/88
WOS Keyword1ST 2 YEARS ; GRB 090426 ; E-P,E-I-E-ISO CORRELATION ; LUMINOSITY RELATION ; OPTICAL AFTERGLOWS ; PEAK ENERGY ; HOST GALAXY ; REDSHIFT ; SWIFT ; SPECTRA
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000303446500002
Citation statistics
Cited Times:57[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/8091
Collection宇宙伽马暴、中子星及相关物理研究团组
Affiliation1.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
Recommended Citation
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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