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Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
130.1894 -45.1203 0.0273 33.5 -36.8 0.7223 7.0 TRIG_00501368
------------------------------------------
Foreground time interval of the image:
0.000 64.000 (delta_t = 64.000 [sec])
Background time interval of the image:
Lightcurves
Notes:
- 1) All plots contain as much data as has been downloaded to date.
- 2) The mask-weighted light curves are using the flight position.
- 3) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 4) For all the mask-weighted lightcurves, the y-axis units are counts/sec/det where a det is 0.4 x 0.4 = 0.16 sq cm.
- 5) The verticle lines correspond to following: green dotted lines are T50 interval, black dotted lines are T90 interval, blue solid line(s) is a spacecraft slew start time, and orange solid line(s) is a spacecraft slew end time.
- 6) Time of each bin is in the middle of the bin.
1 s binning
From T0-310 s to T0+310 s
From T100_start - 20 s to T100_end + 30 s
Full time interval
64 ms binning
Full time interval
From T100_start to T100_end
From T0-5 sec to T0+5 sec
16 ms binning
From T100_start-5 s to T100_start+5 s
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
8 ms binning
From T100_start-3 s to T100_start+3 s
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
2 ms binning
From T100_start-1 s to T100_start+1 s
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
SN=5 or 10 sec. binning (whichever binning is satisfied first)
SN=5 or 10 sec. binning (T < 200 sec)
The mask-weighted light curves based on cleaned DPHs
Spectra
Notes:
- 1) The fitting includes the systematic errors.
- 2) For long bursts, a spectral fit of the pre-slew DRM will introduce some errors in both a spectral shape and a normalization if the PHA file contains a lot of the slew/post-slew time interval.
- 3) For fits to more complicated models (e.g. a power-law over a cutoff power-law), the BAT team has decided to require a chi-square improvement of more than 6 for each extra dof.
- 4) For short bursts (T90<1sec), the specrtum is also fit with Blackbody, OTTB, and Double Blackbody.
Time averaged spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.55596 ( -0.456406 0.551392 )
Norm@50keV : 4.51556E-04 ( -0.000179451 0.000185549 )
------------------------------------------------------------
# Chi-Squared = 69.71 using 59 PHA bins.
# Reduced chi-squared = 1.223 for 57 degrees of freedom
# Null hypothesis probability = 1.204165e-01
Photon flux (15-150 keV) in 64 sec: 9.18369E-02 ( -0.0203152 0.0203637 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.93554e-07 ( -8.31405e-08 9.15501e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.27946 ( )
Epeak [keV] : 16.5195 ( )
Norm@50keV : 3.61711E-03 ( )
------------------------------------------------------------
# Chi-Squared = 69.07 using 59 PHA bins.
# Reduced chi-squared = 1.233 for 56 degrees of freedom
# Null hypothesis probability = 1.127793e-01
Photon flux (15-150 keV) in 64 sec: 8.74264E-02 ( -0.0200695 0.0224106 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.35e-07 ( -7.03802e-08 1.36497e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.98393 ( -120.852 -120.852 )
beta : -3.01470 ( -1.09035 0.700415 )
Epeak [keV] : 20.2146 ( -20.2146 5.13144 )
Norm@50keV : 542.059 ( -542.053 298.158 )
------------------------------------------------------------
# Chi-Squared = 67.23 using 59 PHA bins.
# Reduced chi-squared = 1.222 for 55 degrees of freedom
# Null hypothesis probability = 1.246202e-01
Photon flux (15-150 keV) in 64 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 5.90697 (-1.19198 1.48987)
R^2/D10^2 : 0.363813 (-0.225752 0.617036)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 69.20 using 59 PHA bins.
# Reduced chi-squared = 1.214 for 57 degrees of freedom
# Null hypothesis probability = 1.290035e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.055e-07 5.350e-08
25- 50 1.017e-07 5.165e-08
50-150 8.730e-09 6.556e-09
15-150 2.159e-07 1.001e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 25.1457 (-10.268 21.7553)
Norm : 0.869226 (-0.357802 0.711642)
------------------------------------------------------------
# Chi-Squared = 69.05 using 59 PHA bins.
# Reduced chi-squared = 1.211 for 57 degrees of freedom
# Null hypothesis probability = 1.315294e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.023e-07 3.488e-08
25- 50 1.052e-07 5.032e-08
50-150 4.512e-08 3.331e-08
15-150 2.526e-07 1.008e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.27867 (-5.27481 1.5583)
R1^2/D10^2 : 0.540519 (-0.538648 1.37412)
kT2 [keV] : 24.4490 (-24.1547 -24.1547)
R2^2/D10^2 : 5.10079E-04 (-0.000543118 0.525221)
------------------------------------------------------------
# Chi-Squared = 66.88 using 59 PHA bins.
# Reduced chi-squared = 1.216 for 55 degrees of freedom
# Null hypothesis probability = 1.307675e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.074e-07 6.192e-08
25- 50 9.670e-08 5.670e-08
50-150 8.957e-08 7.811e-08
15-150 2.937e-07 1.525e-07
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.55596 ( -0.456406 0.551392 )
Norm@50keV : 4.51556E-04 ( -0.000179451 0.000185549 )
------------------------------------------------------------
# Chi-Squared = 69.71 using 59 PHA bins.
# Reduced chi-squared = 1.223 for 57 degrees of freedom
# Null hypothesis probability = 1.204165e-01
Photon flux (15-150 keV) in 64 sec: 9.18369E-02 ( -0.0203152 0.0203637 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.93554e-07 ( -8.31405e-08 9.15501e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.27946 ( )
Epeak [keV] : 16.5195 ( )
Norm@50keV : 3.61711E-03 ( )
------------------------------------------------------------
# Chi-Squared = 69.07 using 59 PHA bins.
# Reduced chi-squared = 1.233 for 56 degrees of freedom
# Null hypothesis probability = 1.127793e-01
Photon flux (15-150 keV) in 64 sec: 8.74264E-02 ( -0.0200695 0.0224106 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.35e-07 ( -7.03802e-08 1.36497e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.98393 ( -120.852 -120.852 )
beta : -3.01470 ( -1.09035 0.700415 )
Epeak [keV] : 20.2146 ( -20.2146 5.13144 )
Norm@50keV : 542.059 ( -542.053 301.962 )
------------------------------------------------------------
# Chi-Squared = 67.23 using 59 PHA bins.
# Reduced chi-squared = 1.222 for 55 degrees of freedom
# Null hypothesis probability = 1.246202e-01
Photon flux (15-150 keV) in 64 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 5.90697 (-1.19198 1.48987)
R^2/D10^2 : 0.363813 (-0.225752 0.617036)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 69.20 using 59 PHA bins.
# Reduced chi-squared = 1.214 for 57 degrees of freedom
# Null hypothesis probability = 1.290035e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.055e-07 5.210e-08
25- 50 1.017e-07 5.200e-08
50-150 8.730e-09 6.526e-09
15-150 2.159e-07 1.209e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 25.1457 (-10.268 21.7553)
Norm : 0.869226 (-0.357802 0.711642)
------------------------------------------------------------
# Chi-Squared = 69.05 using 59 PHA bins.
# Reduced chi-squared = 1.211 for 57 degrees of freedom
# Null hypothesis probability = 1.315294e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.023e-07 3.291e-08
25- 50 1.052e-07 4.465e-08
50-150 4.512e-08 3.467e-08
15-150 2.526e-07 9.914e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.27867 (-5.27481 1.5583)
R1^2/D10^2 : 0.540519 (-0.538648 1.37412)
kT2 [keV] : 24.4490 (-24.1547 -24.1547)
R2^2/D10^2 : 5.10079E-04 (-0.000543118 0.525221)
------------------------------------------------------------
# Chi-Squared = 66.88 using 59 PHA bins.
# Reduced chi-squared = 1.216 for 55 degrees of freedom
# Null hypothesis probability = 1.307675e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.074e-07 6.192e-08
25- 50 9.670e-08 5.187e-08
50-150 8.957e-08 6.768e-08
15-150 2.937e-07 1.615e-07
Pre-slew spectrum (Pre-slew PHA with pre-slew DRM)
Power-law model
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.55596 ( -0.456406 0.551392 )
Norm@50keV : 4.51556E-04 ( -0.000179451 0.000185549 )
------------------------------------------------------------
# Chi-Squared = 69.71 using 59 PHA bins.
# Reduced chi-squared = 1.223 for 57 degrees of freedom
# Null hypothesis probability = 1.204165e-01
Photon flux (15-150 keV) in 64 sec: 9.18369E-02 ( -0.0203152 0.0203637 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.93554e-07 ( -8.31405e-08 9.15501e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.27946 ( )
Epeak [keV] : 16.5195 ( )
Norm@50keV : 3.61711E-03 ( )
------------------------------------------------------------
# Chi-Squared = 69.07 using 59 PHA bins.
# Reduced chi-squared = 1.233 for 56 degrees of freedom
# Null hypothesis probability = 1.127793e-01
Photon flux (15-150 keV) in 64 sec: 8.74264E-02 ( -0.0200695 0.0224106 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.35e-07 ( -7.03802e-08 1.36497e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.98393 ( -120.852 -120.852 )
beta : -3.01470 ( -1.09035 0.700415 )
Epeak [keV] : 20.2146 ( -20.2146 5.13144 )
Norm@50keV : 542.059 ( -542.053 293.889 )
------------------------------------------------------------
# Chi-Squared = 67.23 using 59 PHA bins.
# Reduced chi-squared = 1.222 for 55 degrees of freedom
# Null hypothesis probability = 1.246202e-01
Photon flux (15-150 keV) in 64 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 9.78771e-08
S(50-100 keV) = 6.65754e-08
T90 vs. Hardness ratio plot
T90 = 64 sec.
Hardness ratio (energy fluence ratio) = 0.680194
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.636838
Count Ratio (50-100 keV) / (15-25 keV) = 0.310701
Mask shadow pattern
IMX = 5.296631989405186E-01, IMY = 3.969098911135948E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
Spacecraft aspect plot
Bright source in the pre-burst/pre-slew/post-slew images
Pre-burst image of 15-350 keV band
Time interval of the image:
-82.599400 70.300600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
83.6312 21.9988 1.0 55.4 -166.2 5.3957 11.3 0.9 Crab
135.5270 -40.3521 7.5 37.3 -45.2 0.3339 1.5 12.2 Vela X-1
170.0074 -60.4879 0.0 57.1 -15.3 0.3341 0.5 12.2 Cen X-3
83.5036 17.0414 2.6 50.5 -167.0 1.5184 4.4 ------ UNKNOWN
86.6382 16.2997 2.2 49.6 -163.2 1.6262 5.4 ------ UNKNOWN
87.0165 17.9001 2.3 51.1 -162.6 1.6097 5.0 ------ UNKNOWN
130.2058 -45.0925 1.3 33.5 -36.9 1.4410 8.6 ------ UNKNOWN
104.1302 18.1027 2.7 53.2 -142.2 3.4520 4.3 ------ UNKNOWN
111.9791 9.5973 3.1 48.0 -129.0 2.2398 3.8 ------ UNKNOWN
139.7329 -26.9497 3.4 43.7 -64.2 2.1520 3.4 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
0.000000 64.000000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
83.6357 22.0038 1.4 55.5 -166.2 2.2080 8.1 0.7 Crab
135.5609 -40.4876 9.3 37.3 -45.0 0.1601 1.2 4.3 Vela X-1
170.1599 -60.5371 4.9 57.2 -15.2 -0.8864 -2.4 6.9 Cen X-3
57.1702 6.1387 2.3 49.7 156.3 1.4681 4.9 ------ UNKNOWN
66.2072 19.0579 2.1 56.7 173.8 2.6265 5.6 ------ UNKNOWN
163.7629 -73.2707 2.3 53.9 0.0 1.3634 5.0 ------ UNKNOWN
121.1334 -59.5284 2.1 33.7 -8.8 0.5053 5.5 ------ UNKNOWN
130.1894 -45.1203 1.6 33.5 -36.8 0.7225 7.0 ------ UNKNOWN
114.6359 -11.8909 2.0 31.5 -106.5 0.7104 5.7 ------ UNKNOWN
139.6152 -26.8430 3.0 43.7 -64.4 1.2764 3.9 ------ UNKNOWN
117.9443 1.4082 3.3 43.9 -116.1 1.2811 3.5 ------ UNKNOWN
112.0701 9.6495 2.1 48.0 -129.0 1.9657 5.6 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
129.100600 823.090000
824.000000 963.084900
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.7058 -40.6196 10.8 6.0 -72.5 0.4475 1.1 9.0 Vela X-1
170.2279 -60.6314 1.5 28.1 21.4 3.4628 7.7 2.6 Cen X-3
186.6286 -62.7055 4.3 36.1 23.0 1.7028 2.7 4.0 GX 301-2
175.8564 -53.5256 3.1 30.4 6.3 1.8860 3.7 ------ UNKNOWN
130.2125 -45.0261 1.0 0.1 -119.6 4.7396 11.4 ------ UNKNOWN
89.4438 1.7232 3.5 59.1 -166.0 9.9837 3.3 ------ UNKNOWN
182.8755 -27.5278 5.7 45.0 -30.9 1.6794 2.0 ------ UNKNOWN
94.7730 2.7899 4.2 57.3 -160.0 7.1005 2.7 ------ UNKNOWN
193.8966 -21.9570 3.3 56.3 -28.4 8.8582 3.5 ------ UNKNOWN
120.8701 2.1962 2.4 48.0 -129.1 9.2949 4.8 ------ UNKNOWN
Plot creation:
Thu Aug 25 22:38:01 EDT 2011