J/ApJS/195/2 The second Swift BAT GRB catalog (BAT2) (Sakamoto+, 2011)
The Second Swift BAT Gamma-Ray Burst Catalog
Sakamoto T., Barthelmy S.D., Baumgartner W.H., Cummings J.R., Fenimore E.E.,
Gehrels N., Krimm H.A., Markwardt C.B., Palmer D.M., Parsons A.M., Sato G.,
Stamatikos M., Tueller J., Ukwatta T.N., Zhang B.
<Astrophys. J. Suppl. Ser. 195, 2 (2011)>
=2011ApJS..195....2S 2011ApJS..195....2S
ADC_Keywords: Gamma rays
Mission_Name: Swift
Keywords: gamma-ray burst: general
Abstract:
We present the second Swift Burst Alert Telescope (BAT) catalog of
gamma-ray bursts (GRBs), which contains 476 bursts detected by the BAT
between 2004 December 19 and 2009 December 21. This catalog (hereafter
the BAT2 catalog) presents burst trigger time, location, 90% error
radius, duration, fluence, peak flux, time-averaged spectral
parameters, and time-resolved spectral parameters measured by the BAT.
In the correlation study of various observed parameters extracted from
the BAT prompt emission data, we distinguish among long-duration GRBs
(L-GRBs), short-duration GRBs (S-GRBs), and short-duration GRBs with
extended emission (S-GRBs with E.E.) to investigate differences in the
prompt emission properties. The fraction of L-GRBs, S-GRBs, and S-GRBs
with E.E. in the catalog are 89%, 8%, and 2%, respectively. We compare
the BAT prompt emission properties with the BATSE, BeppoSAX, and
HETE-2 GRB samples. We also correlate the observed prompt emission
properties with the redshifts for the GRBs with known redshift. The
BAT T90 and T50 durations peak at 70s and 30s, respectively.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 115 476 BAT GRB summary
table2.dat 108 475 BAT GRB energy fluence
table3.dat 101 475 BAT GRB 1-s peak photon flux
table4.dat 91 476 BAT GRB 1-s peak energy flux
table5.dat 51 475 BAT GRB 20-msec peak photon and energy flux
table6.dat 129 476 BAT time-averaged spectral parameters
table7.dat 179 3323 BAT time-resolved spectral parameters
table8.dat 23 476 BAT GRB T90 and T50 durations in the 140-220keV
band at the GRB rest frame
table9.dat 20 476 Redshift of Swift GRBs
refs.dat 92 74 Redshift references
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See also:
IX/20 : The Fourth BATSE Burst Revised Catalog (Paciesas+ 1999)
J/MNRAS/407/2075 : Gamma-ray bursts spectral peak estimator (Shahmoradi+, 2010)
J/ApJ/693/1484 : Early optical afterglow catalog (Cenko+, 2009)
J/PAZh/35/10 : Gamma-ray bursts with known redshifts (Badjin+, 2009)
J/ApJS/180/192 : BeppoSAX/GRBM γ-ray Burst Catalog (Frontera+, 2009)
J/ApJS/175/179 : The BAT1 gamma-ray burst catalog (Sakamoto+, 2008)
J/ApJS/166/298 : Spectral catalog of bright BATSE gamma-ray bursts (Kaneko+,
2006)
J/A+A/385/377 : 319 gamma-ray bursts BATSE triggers (Quilligan+, 2002)
J/ApJ/563/80 : 3906 gamma-ray bursts BATSE triggers (Stern+, 2001)
J/ApJS/134/385 : Supplement to the BATSE gamma-ray burst catalogs (Kommers+,
2001)
J/ApJS/126/19 : BATSE gamma-ray burst spectral catalog. I. (Preece+, 2000)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- GRB GRB name (YYMMDDA)
9- 14 I6 --- Trigger ? Trigger Number
16- 25 A10 "Y/M/D" T.date Trigger time in UTC (YYYY/MM/DD)
27- 28 I2 h T.h Trigger time in UTC (hour)
30- 31 I2 min T.m Trigger time in UTC (min)
33- 38 F6.3 s T.s Trigger time in UTC (s)
40- 46 F7.3 deg RAdeg ? Right Ascension (J2000)
48- 54 F7.3 deg DEdeg ? Declination (J2000)
56- 63 F8.4 deg RA.X ? XRT (X-ray telescope) Right Ascension (J2000)
65- 72 F8.4 deg DE.X ? XRT (X-ray telescope) Declination (J2000)
74- 78 F5.1 --- SNR ? Signal-to-noise ratio
80- 84 F5.1 arcmin ePos ? 90% error radius
86- 91 A6 s T90 ? Burst duration with 5-95% of fluence
93- 98 A6 s T50 ? Burst duration with 25-75% of fluence
100-103 I4 s Star1 ? Burst start time from BAT trigger T.time
105-108 I4 s Stop1 ? Burst stop time from BAT trigger T.time
110-115 A6 --- Com1 Comment(s) (1)
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Note (1): The comment includes number(s) with the following meaning:
1 = The event data are not available.
2 = Short duration GRB.
3 = The event data of the part of the burst emission are not available.
4 = Short duration GRB with an extended emission.
5 = battblocks failed because of the weak nature of the burst.
6 = GRB found by the ground process.
7 = The detector plane histogram data are used in the fluence calculation
and the spectral analysis.
8 = Possible GRB.
9 = GRB found by the BAT slew survey process.
10 = T90 and T50 are lower limit.
11 = Re-calculate the image significance using the interval determined
by the flight software
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- GRB GRB name (YYMMDDA)
9- 11 A3 --- Mod2 ? Best fit model name: PL (simple power-law)
or CPL (cutoff power-law)
13- 19 F7.2 fJ/cm2 S15-25 ? Energy fluence in 15-25keV (2)
21- 26 F6.2 fJ/cm2 e_S15-25 ? 90% error in S(15-25) (2)
28- 34 F7.2 fJ/cm2 S25-50 ? Energy fluence in 25-50keV (2)
36- 41 F6.2 fJ/cm2 e_S25-50 ? 90% error in S(25-50) (2)
43- 49 F7.2 fJ/cm2 S50-100 ? Energy fluence in 50-100keV (2)
51- 56 F6.2 fJ/cm2 e_S50-100 ? 90% error in S(50-100) (2)
58- 64 F7.2 fJ/cm2 S100-150 ? Energy fluence in 100-150keV (2)
66- 71 F6.2 fJ/cm2 e_S100-150 ? 90% error in S(100-150) (2)
73- 80 F8.2 fJ/cm2 S15-150 ? Energy fluence in 15-150keV (2)
82- 87 F6.2 fJ/cm2 e_S15-150 ? 90% error in S(15-150) (2)
89- 95 F7.2 s Star2 ? Start time
97-104 F8.2 s Stop2 ? Stop time
106-108 A3 --- Com2 Comment(s) about fluences (3)
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Note (2): Units are 10-8erg/cm2 = 10-11J/m2 = 10-15J/cm2
Note (3): Comment uses the following numbers:
1 = The event data are not available.
2 = The event data of the part of the burst emission are not available.
3 = S(100-150) is an upper limit.
4 = S(50-100) is an upper limit.
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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- 7 A7 --- GRB GRB name (YYMMDDA)
9- 11 A3 --- Mod3 ? Best fit model: PL (simple power-law)
or CPL (cutoff power-law)
13- 18 F6.2 ph/cm2/s p15-25 ? 1-s peak photon flux in 15-25keV
20- 25 F6.2 ph/cm2/s e_p15-25 ? 90% error in Pph1s(15-25)
27- 32 F6.2 ph/cm2/s p25-50 ? 1-s peak photon flux in 25-50keV
34- 39 F6.2 ph/cm2/s e_p25-50 ? 90% error in Pph1s(25-50)
41- 46 F6.2 ph/cm2/s p50-100 ? 1-s peak photon flux in 50-100keV
48- 53 F6.2 ph/cm2/s e_p50-100 ? 90% error in Pph1s(50-100)
55- 61 F7.3 ph/cm2/s p100-150 ? 1-s peak photon flux in 100-150keV
63- 69 F7.3 ph/cm2/s e_p100-150 ? 90% error in Pph1s(100-150)
71- 76 F6.2 ph/cm2/s p15-150 ? 1-s peak photon flux in 15-150keV
78- 83 F6.2 ph/cm2/s e_p15-150 ? 90% error in Pph1s(15-150)
85- 91 F7.2 s Star3 ? Start time used for peak photon flux
93-101 A9 --- Com3 Comment(s) about photon flux (4)
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Note (4): Comment as follows:
1 = The event data are not available.
2 = The event data of the part of the burst emission are not available.
3 = Pph1s(15-25) is an upper limit.
4 = Pph1s(25-50) is an upper limit.
5 = Pph1s(50-100) is an upper limit.
6 = Pph1s(100-150) is an upper limit.
7 = Pph1s(15-150) is an upper limit.
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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- 7 A7 --- GRB GRB name (YYMMDDA)
9- 11 A3 --- Mod4 ? Best fit model: PL (simple power-law)
or CPL (cutoff power-law)
13- 18 F6.2 10-11W/m2 E15-25 ? 1-s peak energy flux in 15-25keV (5)
20- 25 F6.2 10-11W/m2 e_E15-25 ? 90% error in Pe1s(15-25) (5)
27- 32 F6.2 10-11W/m2 E25-50 ? 1-s peak energy flux in 25-50keV (5)
34- 39 F6.2 10-11W/m2 e_E25-50 ? 90% error in Pe1s(55-50) (5)
41- 46 F6.2 10-11W/m2 E50-100 ? 1-s peak energy flux in 50-100keV (5)
48- 53 F6.2 10-11W/m2 e_E50-100 ? 90% error in Pe1s(50-100) (5)
55- 60 F6.2 10-11W/m2 E100-150 ? 1-s peak energy flux in 100-150keV (5)
62- 67 F6.2 10-11W/m2 e_E100-150 ? 90% error in Pe1s(100-150) (5)
69- 74 F6.2 10-11W/m2 E15-150 ? 1-s peak energy flux in 15-150keV (5)
76- 81 F6.2 10-11W/m2 e_E15-150 ? 90% error in Pe1s(15-150) (5)
83- 91 A9 --- Com4 Comment(s) about enery flux (6)
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Note (5): In units of 10-8erg/cm2/s
Note (6): Comment as follows:
1 = The event data are not available.
2 = The event data of the part of the burst emission are not available.
3 = Pe1s(15-25) is an upper limit.
4 = Pe1s(25-50) is an upper limit.
5 = Pe1s(50-100) is an upper limit.
6 = Pe1s(100-150) is an upper limit.
7 = Pe1s(15-150) is an upper limit.
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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- 7 A7 --- GRB GRB name (YYMMDDA)
9- 11 A3 --- Mod5 ? Best fit model: PL (simple power-law)
or CPL (cutoff power-law)
13- 18 F6.2 10-11W/m2 E20ms ? 20-ms peak energy flux in 15-150keV
20- 25 F6.2 10-11W/m2 e_E20ms ? 90% error in Pe20ms(15-150)
27- 32 F6.2 ph/cm-2/s p20ms ? 20-ms peak photon flux in 15-150keV
34- 39 F6.2 ph/cm-2/s e_p20ms ? 90% error in Pph20ms(15-150)
41- 47 F7.2 s Star5 ? Start time
49- 51 A3 --- Com5 Comment(s) (7)
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Note (7): Comment as follows:
1 = The event data are not available.
2 = An acceptable fit (reduced χ2>2).
3 = The event data of the part of the burst emission are not available.
4 = Pene20ms(15-150) is an upper limit.
5 = Pph20ms(15-150) is an upper limit.
6 = battblocks failed because of the weak nature of the burst.
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- GRB GRB name (YYMMDDA)
9- 15 F7.3 --- alpha ? Power-law photon index for the
simple power-law model (PL)
17- 23 F7.3 --- e_alpha ? 90% lower level in alphaPL
25- 31 F7.3 --- E_alpha ? 90% upper level in alphaPL
33- 38 F6.1 ph/m2/s/keV K(50) ? PL Normalization at 50keV
40- 44 F5.1 ph/m2/s/keV e_K(50) ? 90% lower level in K50PL
46- 50 F5.1 ph/m2/s/keV E_K(50) ? 90% upper level in K50PL
52- 56 F5.1 --- chi2 ? Power-law χ2 in 57dof
58- 64 F7.3 --- alpha1 ? Power-law photon index for the
cutoff power-law model (CPL)
66- 72 F7.3 --- e_alpha1 ? 90% lower level in alphaCPL
74- 80 F7.3 --- E_alpha1 ? 90% upper level in alphaCPL
82- 87 F6.2 keV Ep ? Cutoff power-law Epeak
89- 94 F6.2 keV e_Ep ? 90% lower level in EpCPL
96-101 F6.2 keV E_Ep ? 90% upper level in EpCPL
103-108 F6.1 10ph/m2/s/keV K1(50) ? CPL Normalization at 50keV
110-114 F5.1 10ph/m2/s/keV e_K1(50) ? 90% lower level in K50CPL
116-121 F6.1 10ph/m2/s/keV E_K1(50) ? 90% upper level in K50CPL
123-127 F5.1 --- chi2CPL ? CPL χ2 in 56 dof
129 I1 --- Com6 ? Comment(s) (8)
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Note (8): Comment as follows:
1 = The event data are not available.
2 = The event data of the part of the burst emission are not available.
3 = No error because of reduced chi2 > 2.
4 = K50PL=2.9, e_K50PL=0.6, E_K50PL=0.5 for the spectrum based on the
event data and K50PL=28.1, e_K50PL=0.4, E_K50PL=0.4 for the spectrum
based on the DPH data. DOF of PL fit is 115.
5 = K50PL=4.4, e_K50PL=0.4, E_K50PL=0.4 for the spectrum based on the
event data and K50PL=3.4, e_K50PL=0.2, E_K50PL=0.2 for the spectrum
based on the DPH data. DOF of PL fit is 115.
6 = K50CPL is an upper limit.
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Byte-by-byte Description of file: table7.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 7 A7 --- GRB GRB name (YYMMDDA)
9- 16 F8.3 s Start ? Start time
18- 25 F8.3 s Stop ? Stop time
27- 33 F7.3 --- alpha ? Power-law photon index for the
simple power-law model (PL)
35- 41 F7.3 --- e_alpha ? 90% lower level in alphaPL
43- 49 F7.3 --- E_alpha ? 90% upper level in alphaPL
51- 56 F6.1 ph/cm2/s/keV K(50) ? PL Normalization at 50keV
58- 62 F5.1 ph/cm2/s/keV e_K(50) ? 90% lower level in K50PL
64- 69 F6.1 ph/cm2/s/keV E_K(50) ? 90% upper level in K50PL
71- 75 F5.1 --- chi2 ? Power-law χ2 in 57dof
77- 81 F5.1 10-11W/m2 F15-150 ? Energy flux in 15-150keV (1)
83- 88 F6.1 10-11W/m2 e_F15-150 ? 90% error in PL_F(15-150) (1)
90- 96 F7.3 --- alpha1 ? Power-law photon index for the
cutoff power-law model (CPL)
98-104 F7.3 --- e_alpha1 ? 90% lower level in alphaCPL
106-112 F7.3 --- E_alpha1 ? 90% upper level in alphaCPL
114-119 F6.2 keV Ep ? Cutoff power-law Epeak
121-126 F6.2 keV e_Ep ? 90% lower level in EpCPL
128-133 F6.2 keV E_Ep ? 90% upper level in EpCPL
135-141 F7.1 10ph/m2/s/keV K1(50) ? CPL Normalization at 50keV
143-149 F7.1 10ph/m2/s/keV e_K1(50) ? 90% lower level in K50CPL
151-157 F7.1 10ph/m2/s/keV E_K1(50) ? 90% upper level in K50CPL
159-163 F5.1 --- chi2CPL ? CPL χ2 in 56dof
165-169 F5.1 10-11W/m2 F1(15-150) ? Energy flux in 15-150keV (1)
171-175 F5.1 10-11W/m2 e_F1(15-150) ? 90% error in CPLF(15-150) (1)
177-179 A3 --- Com7 Comment(s) (2)
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Note (1): In units of 10-8erg/cm2/s.
Note (2): Comment as follows:
1 = Not enough statistics to perform the spectral fit.
2 = No error because reduced chi2 is greater than 2.
3 = K50PL is an upper limit.
4 = PLF(15-150) is an upper limit.
5 = Bad quality of the spectrum.
6 = Spectral parameters are not constrained by a CPL fit.
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Byte-by-byte Description of file: table8.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- GRB GRB name (YYMMDDA)
9- 14 F6.2 s T90src ? T90 duration in 140-220keV at the GRB rest frame
16- 21 F6.2 s T50src ? T50 duration in 140-220keV at the GRB rest frame
23 I1 --- Com8 [1/2]? Comment(s) (9)
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Note (9): Comment as follows:
1 = battblocks failed because of the weak signal in the light curve.
2 = The event data of the part of the burst emission are not available.
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Byte-by-byte Description of file: table9.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- GRB GRB name (YYMMDDA)
9- 17 F9.5 --- z ? Redshift
19- 20 I2 --- r_z ? Reference; see refs.dat file
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Ref Reference number
4- 22 A19 --- BibCode Bibcode
24- 51 A28 --- Aut Author's name
53- 92 A40 --- Com Comment
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History:
From electronic version of the journal
References:
Sakamoto et al. BAT1. 2008ApJS..175..179S 2008ApJS..175..179S Cat. J/ApJS/175/179
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 02-Aug-2011