J/A+A/530/A21 Spectral properties of 438 GRBs (Nava+, 2011)
Spectral properties of 438 GRBs detected by Fermi/GBM.
Nava L., Ghirlanda G., Ghisellini G., Celotti A.
<Astron. Astrophys., 530, A21 (2011)>
=2011A&A...530A..21N 2011A&A...530A..21N
ADC_Keywords: Gamma rays ; Spectroscopy
Keywords: radiation mechanisms: non-thermal - Gamma rays: general
Abstract:
We present the results of the spectral analysis of the public data
of 438 gamma ray bursts (GRBs) detected by the Fermi Gamma ray Burst
Monitor (GBM) up to March 2010. For 432 bursts we could fit the
time-integrated spectrum. In 318 cases we could reliably constrain the
peak energy Eobspeak of their νFν spectrum by analyzing
their time-integrated spectrum between 8keV and 35MeV. Eighty percent
of these spectra are fitted by a power-law with an exponential cutoff,
and the remaining with the Band function. Among these 318 GRBs, 274
belong to the long GRB class and 44 to the short.
Description:
The GBM detected 438 GRBs up to the end of March 2010. A list of the
GRB trigger number and the position in the sky, computed by the GBM,
is provided by the Fermi Science Support Center
(http://heasarc.gsfc.nasa.gov/W3Browse/fermi/fermigbrst.html).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 103 345 Spectral parameters of the time-averaged spectra of
323 Fermi/GBM GRBs fitted with a curved function
table3.dat 66 114 *Spectral parameters of the time-averaged spectra of
108 Fermi/GBM GRBs fitted with a power law (PL)
table4.dat 115 234 Spectral parameters of the peak spectra of 235
Fermi/GBM GRBs fitted with a curved function
table5.dat 107 228 Spectral parameters of the Fermi/GBM GRBs collected
from the GCN Circular Archive
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Note on table3.dat: The 6 GRBs for which the analysis cannot be performed
(lack of data) are also listed.
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See also:
J/other/GCN/1070.1 : HETE Trigger Information (Ricker+, 2001)
J/A+AS/129/1 : GRANAT/WATCH catalogue of gamma-ray bursts (Sazonov+ 1998)
J/ApJS/120/399 : ULYSSES supplement to GRB 3B catalog (Hurley+, 1999)
J/ApJS/134/385 : BATSE gamma-ray burst catalog supplement (Kommers+, 2001)
J/A+A/427/87 : List of GRBs (Gorosabel+, 2004)
J/ApJS/156/217 : IPN supplement to BATSE untriggered GRBs (Hurley+, 2005)
J/A+A/473/347 : BeppoSAX complete catalogue of GRBs (Vetere+, 2007)
J/other/APh/26.367 : GRB from RICE data (Besson+, 2007)
J/ApJ/686/1209 : Optical properties of GRB afterglows (Melandri+, 2008)
J/A+A/498/399 : GRB observed with RHESSI satellite (Ripa+, 2009)
J/ApJ/690/163 : First Swift UV-Opt GRB afterglow catalog (Roming+, 2009)
J/MNRAS/397/1177 : Swift-XRT observations of GRBs (Evans+, 2009)
J/ApJS/191/179 : IPN supplement to the BeppoSAX GRB catalog (Hurley+, 2010)
J/ApJS/195/2 : The second Swift BAT GRB catalog (BAT2) (Sakamoto+, 2011)
J/A+A/528/A122 : SwiftFT catalog (Puccetti+, 2011)
J/ApJS/199/18 : The Fermi GBM catalog (Paciesas+, 2012)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 9 I09 --- GRB GRB name
11- 17 F7.3 s Dt Integration time
19- 22 A4 --- Model Best fit model (CPL or Band) (G3)
24- 31 F8.3 ph/cm2/ks A Normalization constant (G1)
33- 39 F7.2 ph/cm2/ks e_A rms uncertainty on A
41- 46 F6.3 --- alpha Low-energy spectral index α (G3)
48- 52 F5.3 --- e_alpha rms uncertainty on alpha
53- 59 F7.2 keV Epeak Peak energy of the νFν spectrum
61- 66 F6.2 keV e_Epeak rms uncertainty on Epeak
68- 72 F5.2 --- beta ?=- High-energy spectral index β (G3)
74- 77 F4.2 --- e_beta ? rms uncertainty on beta
79- 85 F7.2 --- C-stat Castor statistics resulting from the fit
87- 89 I3 --- dof Degrees of freedom
91- 97 F7.2 10-10J/m2 Fluence Fluence (in 10-7erg/cm2) (G2)
99-103 F5.2 10-10J/m2 e_Fluence rms uncertainty on Fluence
(in 10-7erg/cm2)
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 9 I09 --- GRB GRB name
11- 16 F6.2 s Dt ? Integration time
18- 19 A2 --- Model Best fit model (PL) (G3)
21- 25 F5.2 ph/cm2/ks A ? Normalization constant (G1)
27- 30 F4.2 ph/cm2/ks e_A ? rms uncertainty on A
32- 36 F5.2 --- alpha ? spectral index α (G3)
38- 41 F4.2 --- e_alpha ? rms uncertainty on alpha
43- 49 F7.2 --- C-stat ? Castor statistics resulting from the fit
51- 53 I3 --- dof ? Degrees of freedom
55- 60 F6.2 10-10J/m2 Fluence ? Fluence (in 10-7erg/cm2) (2)
62- 66 F5.2 10-10J/m2 e_Fluence ? rms uncertainty on Fluence
(in 10-7erg/cm2)
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Note (2): The fluence is computed in the 8keV-1MeV energy range.
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 9 I09 --- GRB GRB name
11- 18 F8.4 s Dt Integration time
20- 25 F6.2 s t1 Initial time of the selected temporal bin
27- 32 F6.2 s t2 Final time of the selected temporal bin
34- 37 A4 --- Model Best fit model (CPL Band) (G3)
39- 45 F7.2 ph/cm2/ks A Normalization constant (G1)
47- 52 F6.2 ph/cm2/ks e_A rms uncertainty on A
54- 58 F5.2 --- alpha Low-energy spectral index α (G3)
60- 63 F4.2 --- e_alpha rms uncertainty on alpha
65- 71 F7.2 keV Epeak Peak energy of the νFν spectrum
73- 78 F6.2 keV e_Epeak rms uncertainty on Epeak
80- 84 F5.2 --- beta ?=- High-energy spectral index β (G3)
86- 89 F4.2 --- e_beta ? rms uncertainty on beta
91- 97 F7.2 --- C-stat Castor statistics resulting from the fit
99-101 I3 --- dof Degrees of freedom
103-109 F7.2 10-10J/m2 Fluence Fluence (in 10-7erg/cm2) (G2)
111-115 F5.2 10-10J/m2 e_Fluence rms uncertainty on Fluence
(in 10-7erg/cm2)
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 9 I09 --- GRB GRB name
11- 16 F6.4 --- z ?=- Redshift
18- 24 F7.3 s Dt Integration time
27- 32 F6.1 keV Epeak ?=- Peak energy of the νFν spectrum
34- 39 F6.2 keV e_Epeak ? rms uncertainty on Epeak
42- 48 F7.4 --- alpha Low-energy spectral index
50- 54 F5.3 --- e_alpha rms uncertainty on alpha
55- 60 F6.2 --- beta ?=- High energy spectral index
62- 67 F6.3 --- e_beta ? rms uncertainty on beta
69- 76 E8.3 10-10J/m2 Fluence Fluence (in 10-7erg/cm2)
78- 85 E8.3 10-10J/m2 e_Fluence rms uncertainty on Fluence
(in 10-7erg/cm2)
88- 89 I2 keV E0 Lower energy range
90 A1 --- --- [-]
91- 95 I5 keV E1 Upper energy range
97-101 A5 --- r_z Redshift reference (1)
103-107 I5 --- Ref GCN number
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Note (1): GCN number or
a = Greiner et al., 2009A&A...498...89G 2009A&A...498...89G
b = Salvaterra et al., 2009Natur.461.1258S 2009Natur.461.1258S
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Global notes:
Note (G1): For all models the pivot energy for the amplitude is 100keV.
Note (G2): Fluences obtained by integrating the best-fit model over the
8keV-35MeV energy range.
Note (G3): the spectral models are:
* PL (power law): F(E)∝E^α
* Band (1993ApJ...413..281B 1993ApJ...413..281B): 2 power laws with indices α and β
* CPL (Comptonized model): power law with a high energy exponential cutoff.
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 29-Aug-2011