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Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
280.3027 -4.9180 0.0215 36.4 -124.7 0.0390 8.9 TRIG_00543763
------------------------------------------
Foreground time interval of the image:
0.000 0.016 (delta_t = 0.016 [sec])
Background time interval of the image:
-239.192 0.000 (delta_t = 239.192 [sec])
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 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)
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 0.016 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.94049 ( -0.345555 0.418603 )
Norm@50keV : 5.34590E-02 ( -0.0179183 0.0172783 )
------------------------------------------------------------
#Test statistic : Chi-Squared = 56.91 using 59 PHA bins.
# Reduced chi-squared = 0.9984 for 57 degrees of freedom
# Null hypothesis probability = 4.785739e-01
Photon flux (15-150 keV) in 0.016 sec: 14.0844 ( -3.44814 3.44916 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.00049e-08 ( -2.49394e-09 2.49837e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.016 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.93686 ( -7.73145 2.54209 )
Epeak [keV] : 31.2996 ( -2.79253 4.93864 )
Norm@50keV : 54.5849 ( -73.4326 3.23417e+06 )
------------------------------------------------------------
#Test statistic : Chi-Squared = 45.88 using 59 PHA bins.
# Reduced chi-squared = 0.8193 for 56 degrees of freedom
# Null hypothesis probability = 8.306000e-01
Photon flux (15-150 keV) in 0.016 sec: 16.0723 ( -3.6343 3.6299 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.21333e-08 ( -2.70638e-09 2.70173e-09 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.016 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.24151 ( -4.42995 -4.24131 )
beta : -5.66101 ( 5.69067 2.80392 )
Epeak [keV] : 32.2901 ( -4.86273 3.47958 )
Norm@50keV : 1519.70 ( -1530.39 2590.58 )
------------------------------------------------------------
#Test statistic : Chi-Squared = 45.12 using 59 PHA bins.
# Reduced chi-squared = 0.8203 for 55 degrees of freedom
# Null hypothesis probability = 8.266109e-01
Photon flux (15-150 keV) in 0.016 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] : 7.95981 (-1.16434 1.11634)
R^2/D10^2 : 20.8603 (-9.63702 18.9862)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Test statistic : Chi-Squared = 45.91 using 59 PHA bins.
# Reduced chi-squared = 0.8054 for 57 degrees of freedom
# Null hypothesis probability = 8.535683e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.810e-09 1.366e-09
25- 50 6.609e-09 2.078e-09
50-150 1.707e-09 9.261e-10
15-150 1.213e-08 3.456e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 25.2288 (-6.32898 7.91249)
Norm : 151.554 (-50.4703 68.2163)
------------------------------------------------------------
#Test statistic : Chi-Squared = 50.66 using 59 PHA bins.
# Reduced chi-squared = 0.8887 for 57 degrees of freedom
# Null hypothesis probability = 7.104498e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.467e-09 1.190e-09
25- 50 4.605e-09 1.332e-09
50-150 1.985e-09 1.029e-09
15-150 1.106e-08 2.828e-09
Double BB
kT1 [keV] : 200.000 ( )
R1^2/D10^2 : 7.73975E-05 (-7.74029e-05 -7.74029e-05)
kT2 [keV] : 7.84075 (-1.32738 1.19764)
R2^2/D10^2 : 22.0014 (-10.6629 19.214)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.91 using 59 PHA bins.
#Test statistic : Chi-Squared = 45.91 using 59 PHA bins.
#Fit statistic : Chi-Squared = 45.85 using 59 PHA bins.
#Test statistic : Chi-Squared = 45.85 using 59 PHA bins.
# Reduced chi-squared = 0.8346 for 55 degrees of freedom
# Reduced chi-squared = 0.8336 for 55 degrees of freedom
# Null hypothesis probability = 8.038888e-01
# Null hypothesis probability = 8.055256e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.801e-09 3.654e-09
25- 50 6.615e-09 1.857e-06
50-150 1.719e-09 1.987e-05
15-150 1.214e-08 1.380e-05
Peak spectrum fit
Power-law model
Time interval is from -0.490 sec. to 0.510 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.18854 ( -1.45447 4.02713 )
Norm@50keV : 1.54141E-03 ( -0.00154817 0.00171146 )
------------------------------------------------------------
#Test statistic : Chi-Squared = 68.04 using 59 PHA bins.
# Reduced chi-squared = 1.194 for 57 degrees of freedom
# Null hypothesis probability = 1.501691e-01
Photon flux (15-150 keV) in 1 sec: 0.253608 ( -0.223392 0.223413 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.45492e-08 ( -1.45492e-08 1.56012e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.490 sec. to 0.510 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -6.58544E-02 ( )
Epeak [keV] : 45.5565 ( )
Norm@50keV : 2.34653E-02 ( )
------------------------------------------------------------
#Test statistic : Chi-Squared = 67.27 using 59 PHA bins.
# Reduced chi-squared = 1.201 for 56 degrees of freedom
# Null hypothesis probability = 1.438612e-01
Photon flux (15-150 keV) in 1 sec: 0.242673 ( -0.20559 0.223542 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.51547e-08 ( -1.51547e-08 3.03926e-08 ) ergs/cm2
Band function
Time interval is from -0.490 sec. to 0.510 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.913741 ( -7.22811 -0.913869 )
beta : -9.37167 ( 9.37167 19.3714 )
Epeak [keV] : 47.9402 ( -35.5428 251.511 )
Norm@50keV : 5.72628E-02 ( -0.0574058 65.1008 )
------------------------------------------------------------
#Test statistic : Chi-Squared = 67.21 using 59 PHA bins.
# Reduced chi-squared = 1.222 for 55 degrees of freedom
# Null hypothesis probability = 1.250025e-01
Photon flux (15-150 keV) in 1 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] : 12.4257 (-8.80921 13.4007)
R^2/D10^2 : 6.23127E-02 (-0.0622851 7.03335)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Test statistic : Chi-Squared = 67.18 using 59 PHA bins.
# Reduced chi-squared = 1.179 for 57 degrees of freedom
# Null hypothesis probability = 1.676987e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.039e-09 1.472e-09
25- 50 6.681e-09 4.789e-09
50-150 6.345e-09 5.290e-09
15-150 1.506e-08 1.137e-08
Thermal bremsstrahlung (OTTB)
***Warning: Zero alpha-matrix diagonal element for parameter 2
Parameter 2 is pegged at 1.47427 due to zero or negative pivot element, likely
caused by the fit being insensitive to the parameter.
***Warning: Zero alpha-matrix diagonal element for parameter 2
Parameter 2 is pegged at 1.47427 due to zero or negative pivot element, likely
caused by the fit being insensitive to the parameter.
***Warning: Zero alpha-matrix diagonal element for parameter 2
Parameter 2 is pegged at 1.47427 due to zero or negative pivot element, likely
caused by the fit being insensitive to the parameter.
***Warning: Zero alpha-matrix diagonal element for parameter 2
Parameter 2 is pegged at 1.47427 due to zero or negative pivot element, likely
caused by the fit being insensitive to the parameter.
***Warning: Zero alpha-matrix diagonal element for parameter 2
Parameter 2 is pegged at 1.47427 due to zero or negative pivot element, likely
caused by the fit being insensitive to the parameter.
***Warning: Zero alpha-matrix diagonal element for parameter 2
Parameter 2 is pegged at 1.47427 due to zero or negative pivot element, likely
caused by the fit being insensitive to the parameter.
Double BB
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.09 using 59 PHA bins.
#Test statistic : Chi-Squared = 67.09 using 59 PHA bins.
#Fit statistic : Chi-Squared = 67.07 using 59 PHA bins.
#Test statistic : Chi-Squared = 67.07 using 59 PHA bins.
#Fit statistic : Chi-Squared = 67.02 using 59 PHA bins.
#Test statistic : Chi-Squared = 67.02 using 59 PHA bins.
# Reduced chi-squared = 1.220 for 55 degrees of freedom
# Reduced chi-squared = 1.219 for 55 degrees of freedom
# Reduced chi-squared = 1.219 for 55 degrees of freedom
# Null hypothesis probability = 1.270816e-01
# Null hypothesis probability = 1.274102e-01
# Null hypothesis probability = 1.282417e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.571e-09 1.531e-09
25- 50 6.364e-09 4.150e-09
50-150 6.558e-09 5.240e-09
15-150 1.549e-08 1.299e-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: 2.94049 ( -0.345555 0.418603 )
Norm@50keV : 5.34590E-02 ( -0.0179183 0.0172783 )
------------------------------------------------------------
#Test statistic : Chi-Squared = 56.91 using 59 PHA bins.
# Reduced chi-squared = 0.9984 for 57 degrees of freedom
# Null hypothesis probability = 4.785739e-01
Photon flux (15-150 keV) in 0.016 sec: 14.0844 ( -3.44814 3.44916 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.00049e-08 ( -2.49394e-09 2.49837e-09 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.93686 ( -7.73145 2.54209 )
Epeak [keV] : 31.2996 ( -2.79253 4.93864 )
Norm@50keV : 54.5849 ( -73.4326 3.23417e+06 )
------------------------------------------------------------
#Test statistic : Chi-Squared = 45.88 using 59 PHA bins.
# Reduced chi-squared = 0.8193 for 56 degrees of freedom
# Null hypothesis probability = 8.306000e-01
Photon flux (15-150 keV) in 0.016 sec: 16.0723 ( -3.6343 3.6299 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.21333e-08 ( -2.70638e-09 2.70173e-09 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.24151 ( -4.42995 -4.24131 )
beta : -5.66101 ( 5.69067 2.80392 )
Epeak [keV] : 32.2901 ( -4.86273 3.47958 )
Norm@50keV : 1519.70 ( -1530.39 2509.89 )
------------------------------------------------------------
#Test statistic : Chi-Squared = 45.12 using 59 PHA bins.
# Reduced chi-squared = 0.8203 for 55 degrees of freedom
# Null hypothesis probability = 8.266109e-01
Photon flux (15-150 keV) in 0.016 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) = 3.34766e-09
S(50-100 keV) = 1.74386e-09
T90 vs. Hardness ratio plot
T90 = 0.0119999647140503 sec.
Hardness ratio (energy fluence ratio) = 0.520919
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.914
Count Ratio (50-100 keV) / (15-25 keV) = 0.727765
Mask shadow pattern
IMX = -4.192406304446508E-01, IMY = 6.052095270190621E-01
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:
-239.192000 0.000000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9835 -15.6284 0.5 38.5 -63.2 8.2256 21.4 0.7 Sco X-1
254.2729 35.3661 70.1 13.7 98.9 0.0309 0.2 9.2 Her X-1
268.4039 -1.4288 3.4 26.6 -110.0 0.7875 3.4 2.6 SW J1753.5-0127
274.1168 -13.9526 4.0 40.3 -108.2 1.6806 2.9 8.2 GX 17+2
288.7943 10.9365 2.5 34.1 -155.9 0.9558 4.6 0.6 GRS 1915+105
299.6118 35.2291 1.7 41.2 162.0 2.2611 7.0 2.0 Cyg X-1
308.1491 40.9917 4.7 48.5 155.0 1.4358 2.5 2.9 Cyg X-3
226.3867 54.9610 2.9 39.6 75.8 2.8800 4.0 ------ UNKNOWN
314.3594 40.5823 2.6 53.2 156.0 4.1321 4.4 ------ UNKNOWN
293.0990 8.6984 2.7 38.9 -155.2 1.0596 4.3 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
0.000000 0.016000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
245.1518 -15.7491 25.6 38.6 -63.5 -0.0025 -0.5 11.9 Sco X-1
254.6096 35.4627 38.0 13.8 100.1 -0.0005 -0.3 10.4 Her X-1
268.5194 -1.5746 0.0 26.7 -110.1 0.0019 0.6 11.7 SW J1753.5-0127
274.1370 -14.1368 48.0 40.4 -108.1 -0.0022 -0.2 9.7 GX 17+2
288.7977 10.9454 929.4 34.1 -155.9 0.0000 0.0 0.0 GRS 1915+105
299.5370 35.0924 7.5 41.1 162.2 -0.0042 -1.5 7.1 Cyg X-1
308.0212 41.0319 3.0 48.4 155.0 -0.0151 -3.9 6.2 Cyg X-3
301.7815 46.7327 2.3 45.2 146.1 0.0171 5.0 ------ UNKNOWN
280.3027 -4.9181 1.3 36.4 -124.7 0.0390 8.9 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
299.508610 962.928000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
61.4702 -39.9266 3.2 10.9 -160.8 1.2649 3.6 ------ UNKNOWN
42.5708 -40.9373 5.0 13.1 -87.4 0.8093 2.3 ------ UNKNOWN
355.6505 -24.9492 3.9 50.8 -44.5 5.5541 3.0 ------ UNKNOWN
Plot creation:
Sun Jan 6 03:46:46 EST 2013