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Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
75.2732 +45.2542 0.0057 9.7 49.6 0.2327 33.9 TRIG_00323650
------------------------------------------
Foreground time interval of the image:
-0.004 0.128 (delta_t = 0.132 [sec])
Background time interval of the image:
-239.476 -0.004 (delta_t = 239.472 [sec])
Lightcurves
Notes:
- 1) All plots contain as much data as has been downloaded to date.
- 2) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 3) 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.
- 4) 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.
- 5) 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 0.016000
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 0.016000
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 0.016000
SN=5 or 10 sec. binning (whichever binning is satisfied first)
SN=5 or 10 sec. binning (T < 200 sec)
Flight mask-tagged light curves
Caution: Mask-weight map is always using the same on-axis map
Quad-rate summed light curves (from T0-300 to T0+1000)
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 -0.004 sec. to 0.128 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.48538 ( )
Norm@50keV : 7.19182E-02 ( )
------------------------------------------------------------
# Chi-Squared = 160.17 using 59 PHA bins.
# Reduced chi-squared = 2.8101 for 57 degrees of freedom
# Null hypothesis probability = 9.694356e-12
Photon flux (15-150 keV) in 0.132 sec: 14.0015 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 9.45652e-08 ( 0 0 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.004 sec. to 0.128 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 8.11006E-02 ( -0.583764 0.506469 )
Epeak [keV] : 37.5504 ( -3.03684 2.70314 )
Norm@50keV : 1.40047 ( -0.658067 1.55429 )
------------------------------------------------------------
# Chi-Squared = 55.59 using 59 PHA bins.
# Reduced chi-squared = 0.9926 for 56 degrees of freedom
# Null hypothesis probability = 4.904100e-01
Photon flux (15-150 keV) in 0.132 sec: 13.2486 ( -0.8099 0.8134 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.45738e-08 ( -5.71916e-09 5.75164e-09 ) ergs/cm2
Band function
Time interval is from -0.004 sec. to 0.128 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.87144E-02 ( -0.508516 0.597896 )
beta : -9.99927 ( 4346.87 4356.86 )
Epeak [keV] : 37.3725 ( -2.87546 2.87507 )
Norm@50keV : 1.37915 ( -0.63639 1.58272 )
------------------------------------------------------------
# Chi-Squared = 55.60 using 59 PHA bins.
# Reduced chi-squared = 1.011 for 55 degrees of freedom
# Null hypothesis probability = 4.520116e-01
Photon flux (15-150 keV) in 0.132 sec: 13.2499 ( -0.8082 0.8076 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.44645e-08 ( -5.69276e-09 5.74332e-09 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.0700 (-0.500411 0.519732)
R^2/D10^2 : 6.59279 (-1.2171 1.49622)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 73.46 using 59 PHA bins.
# Reduced chi-squared = 1.289 for 57 degrees of freedom
# Null hypothesis probability = 7.007938e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.802e-08 1.445e-09
25- 50 4.523e-08 2.330e-09
50-150 2.409e-08 3.142e-09
15-150 8.734e-08 5.273e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 43.8154 (-4.16851 4.60824)
Norm : 88.4311 (-7.55115 8.24499)
------------------------------------------------------------
# Chi-Squared = 76.13 using 59 PHA bins.
# Reduced chi-squared = 1.336 for 57 degrees of freedom
# Null hypothesis probability = 4.604867e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.758e-08 2.033e-09
25- 50 3.769e-08 2.099e-09
50-150 3.212e-08 4.349e-09
15-150 9.739e-08 5.425e-09
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.13298 (-1.91664 2.94372)
R1^2/D10^2 : 83.1107 (-67.7844 2386.3)
kT2 [keV] : 11.6535 (-1.22631 2.79509)
R2^2/D10^2 : 3.16948 (-2.26112 2.28001)
------------------------------------------------------------
# Chi-Squared = 55.14 using 59 PHA bins.
# Reduced chi-squared = 1.002 for 55 degrees of freedom
# Null hypothesis probability = 4.695099e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.365e-08 8.359e-09
25- 50 4.103e-08 8.224e-09
50-150 2.921e-08 5.821e-09
15-150 9.388e-08 1.845e-08
Peak spectrum fit
Power-law model
Time interval is from -0.436 sec. to 0.564 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.99872 ( -0.120672 0.125708 )
Norm@50keV : 1.25159E-02 ( -0.00113247 0.00111696 )
------------------------------------------------------------
# Chi-Squared = 76.63 using 59 PHA bins.
# Reduced chi-squared = 1.344 for 57 degrees of freedom
# Null hypothesis probability = 4.245569e-02
Photon flux (15-150 keV) in 1 sec: 1.87629 ( -0.131849 0.131849 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.15414e-07 ( -9.86065e-09 9.98296e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.436 sec. to 0.564 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.835890 ( -0.674639 0.587865 )
Epeak [keV] : 40.3343 ( -5.68035 6.8299 )
Norm@50keV : 6.16389E-02 ( -0.0338213 0.0944055 )
------------------------------------------------------------
# Chi-Squared = 63.82 using 59 PHA bins.
# Reduced chi-squared = 1.140 for 56 degrees of freedom
# Null hypothesis probability = 2.208671e-01
Photon flux (15-150 keV) in 1 sec: 1.83691 ( -0.13244 0.13275 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.05132e-07 ( -1.00477e-08 1.0625e-08 ) ergs/cm2
Band function
Time interval is from -0.436 sec. to 0.564 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.816836 ( -0.592226 1.12663 )
beta : -3.60532 ( 3.56359 1.2167 )
Epeak [keV] : 40.1395 ( -8.25579 6.51702 )
Norm@50keV : 6.35017E-02 ( -0.0200012 0.376845 )
------------------------------------------------------------
# Chi-Squared = 63.68 using 59 PHA bins.
# Reduced chi-squared = 1.158 for 55 degrees of freedom
# Null hypothesis probability = 1.975402e-01
Photon flux (15-150 keV) in 1 sec: 12.8818 ( -0.7643 0.7802 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.92116e-07 ( -3.9455e-08 3.8268e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.86546 (-0.738447 0.791018)
R^2/D10^2 : 0.972881 (-0.250176 0.336548)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 88.62 using 59 PHA bins.
# Reduced chi-squared = 1.555 for 57 degrees of freedom
# Null hypothesis probability = 4.619909e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.919e-08 2.160e-09
25- 50 4.681e-08 3.490e-09
50-150 2.349e-08 4.400e-09
15-150 8.949e-08 7.310e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 62.8919 (-11.653 15.3551)
Norm : 9.81747 (-1.04909 1.10743)
------------------------------------------------------------
# Chi-Squared = 65.54 using 59 PHA bins.
# Reduced chi-squared = 1.150 for 57 degrees of freedom
# Null hypothesis probability = 2.047624e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.485e-08 2.250e-09
25- 50 3.836e-08 2.760e-09
50-150 4.536e-08 8.230e-09
15-150 1.086e-07 9.690e-09
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.99686 (-1.42381 1.7006)
R1^2/D10^2 : 6.86492 (-4.1371 13.7259)
kT2 [keV] : 14.1473 (-2.32185 4.36148)
R2^2/D10^2 : 0.180838 (-0.130039 0.16417)
------------------------------------------------------------
# Chi-Squared = 63.57 using 59 PHA bins.
# Reduced chi-squared = 1.156 for 55 degrees of freedom
# Null hypothesis probability = 2.001758e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.429e-08 1.007e-08
25- 50 3.956e-08 1.710e-08
50-150 3.847e-08 2.065e-08
15-150 1.023e-07 3.921e-08
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: 2.48538 ( )
Norm@50keV : 7.19182E-02 ( )
------------------------------------------------------------
# Chi-Squared = 160.17 using 59 PHA bins.
# Reduced chi-squared = 2.8101 for 57 degrees of freedom
# Null hypothesis probability = 9.694356e-12
Photon flux (15-150 keV) in 0.132 sec: 14.0015 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 9.45652e-08 ( 0 0 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 8.11006E-02 ( -0.583764 0.506469 )
Epeak [keV] : 37.5504 ( -3.03684 2.70314 )
Norm@50keV : 1.40047 ( -0.658067 1.55429 )
------------------------------------------------------------
# Chi-Squared = 55.59 using 59 PHA bins.
# Reduced chi-squared = 0.9926 for 56 degrees of freedom
# Null hypothesis probability = 4.904100e-01
Photon flux (15-150 keV) in 0.132 sec: 13.2486 ( -0.8099 0.8134 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.45738e-08 ( -5.71916e-09 5.75164e-09 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.87144E-02 ( -0.508516 0.597896 )
beta : -9.99927 ( 4346.87 4356.86 )
Epeak [keV] : 37.3725 ( -2.87546 2.87507 )
Norm@50keV : 1.37915 ( -0.63639 1.58272 )
------------------------------------------------------------
# Chi-Squared = 55.60 using 59 PHA bins.
# Reduced chi-squared = 1.011 for 55 degrees of freedom
# Null hypothesis probability = 4.520116e-01
Photon flux (15-150 keV) in 0.132 sec: 13.2499 ( -0.8082 0.8076 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.44645e-08 ( -5.69276e-09 5.74332e-09 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 3.13326e-08
S(50-100 keV) = 2.24046e-08
T90 vs. Hardness ratio plot
T90 = 0.0920000076293945 sec.
Hardness ratio (energy fluence ratio) = 0.715057
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.16416
Count Ratio (50-100 keV) / (15-25 keV) = 0.443251
Mask shadow pattern
IMX = 0, IMY = 0
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.016000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.016000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.016000
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:
-239.476000 -0.004000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
83.6506 22.0180 0.2 29.4 -0.5 10.1670 48.3 1.0 Crab
41.7596 28.2614 2.6 40.6 66.7 3.0744 4.4 ------ UNKNOWN
74.6556 35.5316 3.1 18.0 27.2 0.6953 3.7 ------ UNKNOWN
84.2787 24.4201 2.6 27.0 -1.3 0.9477 4.4 ------ UNKNOWN
243.1842 69.1058 2.7 58.3 -176.7 5.3552 4.2 ------ UNKNOWN
235.4941 69.2107 2.5 57.3 -173.7 5.0399 4.6 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-0.004000 0.128000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
83.6854 22.1385 5.0 29.3 -0.5 -0.0199 -2.3 8.0 Crab
37.8386 32.8740 2.6 39.8 75.4 0.1298 4.4 ------ UNKNOWN
75.2732 45.2542 0.3 9.7 49.6 0.2327 33.8 ------ UNKNOWN
93.9654 23.3951 1.8 28.5 -20.3 0.0446 6.4 ------ UNKNOWN
144.9532 41.6702 2.6 40.1 -106.0 0.1057 4.4 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
37.424600 962.640000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
83.6318 22.0166 0.1 24.2 -15.5 38.8930 80.8 0.1 Crab
38.6955 22.9090 2.4 37.1 69.1 6.4607 4.8 ------ UNKNOWN
60.4439 62.0772 2.5 18.9 161.9 2.1241 4.7 ------ UNKNOWN
Plot creation:
Wed Feb 17 12:08:32 EST 2010