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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
349.2325 55.8127 0.0204 31.8397 57.1278 2.2593152 9.440 TRIG_00661036
Foreground time interval of the image:
-1.040 132.848 (delta_t = 133.888 [sec])
Background time interval of the image:
-501.323 -484.563 (delta_t = 16.761 [sec])
-239.424 -1.040 (delta_t = 238.384 [sec])
Lightcurves
Notes:
- 1) The mask-weighted light curves are using the flight position.
- 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 8.192000
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 8.192000
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 8.192000
SN=5 or 10 sec. binning (whichever binning is satisfied first)
SN=5 or 10 sec. binning (T < 200 sec)
Quad-rate summed light curves (from T0-300s to T0+1000s)
Spectral Evolution
Spectra
Notes:
- 1) The fitting includes the systematic errors.
- 2) When the burst includes telescope slew time periods, the fitting uses an average response file made from multiple 5-s response files through out the slew time plus single time preiod for the non-slew times, and weighted by the total counts in the corresponding time period using addrmf. An average response file is needed becuase a spectral fit using 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.
Time averaged spectrum fit using the average DRM
Power-law model
Time interval is from -1.040 sec. to 132.848 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.89181 ( -0.264442 0.280793 )
Norm@50keV : 9.64012E-04 ( -0.000173639 0.000168312 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.89 using 59 PHA bins.
# Reduced chi-squared = 0.9103 for 57 degrees of freedom
# Null hypothesis probability = 6.667102e-01
Photon flux (15-150 keV) in 133.9 sec: 0.137868 ( -0.0201217 0.0201274 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.18667e-06 ( -2.06098e-07 2.11737e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -1.040 sec. to 132.848 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.65039 ( -1.63916 0.561122 )
Epeak [keV] : 59.7454 ( )
Norm@50keV : 1.33585E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.78 using 59 PHA bins.
# Reduced chi-squared = 0.9247 for 56 degrees of freedom
# Null hypothesis probability = 6.352202e-01
Photon flux (15-150 keV) in 133.9 sec: 0.136635 ( -0.021221 0.020907 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.15274e-06 ( -2.67185e-07 2.40438e-07 ) ergs/cm2
Band function
Time interval is from -1.040 sec. to 132.848 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.783802 ( -2.57577 -2.57577 )
beta : -2.11176 ( 2.11996 0.421418 )
Epeak [keV] : 29.5050 ( -27.0962 80.8365 )
Norm@50keV : 7.27174E-02 ( -0.0729247 49.9781 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.73 using 59 PHA bins.
# Reduced chi-squared = 0.9224 for 55 degrees of freedom
# Null hypothesis probability = 6.383094e-01
Photon flux (15-150 keV) in 133.9 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] : 9.77927 (-1.50134 1.83053)
R^2/D10^2 : 7.06940E-02 (-0.0341811 0.0631961)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.07 using 59 PHA bins.
# Reduced chi-squared = 1.036 for 57 degrees of freedom
# Null hypothesis probability = 3.997489e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.829e-07 4.646e-08
25- 50 4.405e-07 9.614e-08
50-150 2.154e-07 9.814e-08
15-150 8.388e-07 1.742e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 77.2988 (-29.9229 71.663)
Norm : 0.655073 (-0.129454 0.179582)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.92 using 59 PHA bins.
# Reduced chi-squared = 0.9109 for 57 degrees of freedom
# Null hypothesis probability = 6.655460e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.271e-07 4.419e-08
25- 50 3.707e-07 6.929e-08
50-150 5.111e-07 2.953e-07
15-150 1.109e-06 3.093e-07
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.45002 (-2.11992 1.75081)
R1^2/D10^2 : 0.113981 (-0.0613725 0.186025)
kT2 [keV] : 199.443 (-199.443 -199.443)
R2^2/D10^2 : 1.32085E-05 (-6.86033e-06 0.0025971)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.35 using 59 PHA bins.
#Fit statistic : Chi-Squared = 49.20 using 59 PHA bins.
# Reduced chi-squared = 0.8973 for 55 degrees of freedom
# Reduced chi-squared = 0.8945 for 55 degrees of freedom
# Null hypothesis probability = 6.893119e-01
# Null hypothesis probability = 6.948296e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.116e-07 9.440e-08
25- 50 4.028e-07 1.444e-07
50-150 5.741e-07 3.248e-07
15-150 1.189e-06 4.563e-07
Peak spectrum fit
Power-law model
Time interval is from 10.372 sec. to 11.372 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.39905 ( -0.555454 0.535599 )
Norm@50keV : 5.79697E-03 ( -0.00180806 0.00180682 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.63 using 59 PHA bins.
# Reduced chi-squared = 1.099 for 57 degrees of freedom
# Null hypothesis probability = 2.834475e-01
Photon flux (15-150 keV) in 1 sec: 0.705810 ( -0.228678 0.230472 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.60251e-08 ( -1.86415e-08 1.89476e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 10.372 sec. to 11.372 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.745871 ( -4.0009 1.59797 )
Epeak [keV] : 98.2085 ( -98.1845 -98.1845 )
Norm@50keV : 1.22704E-02 ( -0.012275 1.18588 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.39 using 59 PHA bins.
# Reduced chi-squared = 1.114 for 56 degrees of freedom
# Null hypothesis probability = 2.594450e-01
Photon flux (15-150 keV) in 1 sec: 0.689515 ( -0.238715 0.237354 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.38217e-08 ( -2.03403e-08 2.03406e-08 ) ergs/cm2
Band function
Time interval is from 10.372 sec. to 11.372 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.169158 ( 0.601292 0.601292 )
beta : -1.83702 ( 1.66356 0.778789 )
Epeak [keV] : 60.6986 ( -60.2022 213.258 )
Norm@50keV : 4.08975E-02 ( -0.0423329 600373 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.17 using 59 PHA bins.
# Reduced chi-squared = 1.130 for 55 degrees of freedom
# Null hypothesis probability = 2.360331e-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] : 15.6845 (-4.70073 8.30737)
R^2/D10^2 : 7.21962E-02 (-0.0718789 0.182505)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.71 using 59 PHA bins.
# Reduced chi-squared = 1.118 for 57 degrees of freedom
# Null hypothesis probability = 2.521814e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.688e-09 2.388e-09
25- 50 1.525e-08 9.730e-09
50-150 2.602e-08 1.733e-08
15-150 4.496e-08 2.779e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-126.427 -199.363)
Norm : 2.95100 (-0.919745 0.919955)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.72 using 59 PHA bins.
# Reduced chi-squared = 1.100 for 57 degrees of freedom
# Null hypothesis probability = 2.807021e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.348e-09 4.520e-09
25- 50 1.414e-08 8.535e-09
50-150 3.100e-08 1.944e-08
15-150 5.249e-08 3.219e-08
Double BB
R1^2/D10^2 : 8.84926E-04 (-0.000874986 0.165003)
kT2 [keV] : 11.2468 (-11.2576 9.08901)
R2^2/D10^2 : 0.178961 (-0.178544 -0.178544)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.85 using 59 PHA bins.
#Fit statistic : Chi-Squared = 62.29 using 59 PHA bins.
#Fit statistic : Chi-Squared = 62.17 using 59 PHA bins.
# Reduced chi-squared = 1.143 for 55 degrees of freedom
# Reduced chi-squared = 1.133 for 55 degrees of freedom
# Reduced chi-squared = 1.130 for 55 degrees of freedom
# Null hypothesis probability = 2.181054e-01
# Null hypothesis probability = 2.327459e-01
# Null hypothesis probability = 2.361013e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.773e-09 2.742e-09
25- 50 1.355e-08 8.280e-09
50-150 2.866e-08 1.777e-08
15-150 4.799e-08 2.909e-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: 1.89181 ( -0.264442 0.280793 )
Norm@50keV : 9.64012E-04 ( -0.000173639 0.000168312 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.89 using 59 PHA bins.
# Reduced chi-squared = 0.9103 for 57 degrees of freedom
# Null hypothesis probability = 6.667102e-01
Photon flux (15-150 keV) in 133.9 sec: 0.137868 ( -0.0201217 0.0201274 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.18667e-06 ( -2.06098e-07 2.11737e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.65039 ( -1.63916 0.561158 )
Epeak [keV] : 59.7454 ( )
Norm@50keV : 1.33585E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.78 using 59 PHA bins.
# Reduced chi-squared = 0.9247 for 56 degrees of freedom
# Null hypothesis probability = 6.352202e-01
Photon flux (15-150 keV) in 133.9 sec: 0.136635 ( -0.021221 0.020907 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.15274e-06 ( -2.67185e-07 2.40438e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.783802 ( -2.57577 -2.57577 )
beta : -2.11176 ( 2.11996 0.421418 )
Epeak [keV] : 29.5050 ( -27.0962 80.9917 )
Norm@50keV : 7.27174E-02 ( -0.0729247 49.9674 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.73 using 59 PHA bins.
# Reduced chi-squared = 0.9224 for 55 degrees of freedom
# Null hypothesis probability = 6.383094e-01
Photon flux (15-150 keV) in 133.9 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) = 3.45e-07
S(50-100 keV) = 3.72e-07
T90 vs. Hardness ratio plot
T90 = 117.680000007153 sec.
Hardness ratio (energy fluence ratio) = 1.07826
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.31589
Count Ratio (50-100 keV) / (15-25 keV) = 0.547575
Mask shadow pattern
IMX = 3.370504102847328E-01, IMY = -5.215546828021406E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 8.192000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 8.192000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 8.192000
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:
-501.323400 -484.562600
-239.424000 -1.040000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.3987 35.1506 0.0 36.9 -82.8 -0.7345 -1.3 11.9 Her X-1
288.8733 10.9802 5.1 35.2 -152.8 0.5992 2.2 4.9 GRS 1915+105
299.5960 35.2141 0.6 9.4 -164.9 4.0395 18.6 0.8 Cyg X-1
308.1293 40.9624 1.1 6.0 128.9 2.3136 10.9 1.0 Cyg X-3
326.1451 38.3392 15.6 19.3 105.1 0.1798 0.7 1.6 Cyg X-2
0.6585 65.8287 1.9 37.9 40.1 2.5882 6.1 ------ UNKNOWN
342.1291 63.0899 2.3 29.5 41.8 1.4065 5.0 ------ UNKNOWN
278.4687 29.8740 2.1 23.3 -115.7 1.3599 5.4 ------ UNKNOWN
225.8886 64.5838 3.2 44.9 -30.9 1.5125 3.6 ------ UNKNOWN
266.4793 12.6423 3.0 43.7 -120.5 3.4121 3.9 ------ UNKNOWN
221.1093 53.1930 2.9 50.8 -44.5 4.6755 4.0 ------ UNKNOWN
269.1993 5.6699 2.8 48.0 -129.0 4.0969 4.1 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-1.040000 132.848000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.6764 35.3484 13.7 36.6 -82.6 -0.2838 -0.8 10.7 Her X-1
288.6962 10.9138 3.9 35.3 -152.6 0.5334 3.0 6.3 GRS 1915+105
299.6686 35.3063 4.0 9.3 -165.1 -0.4007 -2.9 7.4 Cyg X-1
308.0591 41.1015 6.7 5.8 128.2 -0.2422 -1.7 9.2 Cyg X-3
325.9965 38.3941 14.6 19.2 105.1 -0.1360 -0.8 9.3 Cyg X-2
349.2306 55.8138 1.2 31.8 57.1 2.2540 9.4 ------ UNKNOWN
319.7270 15.2546 2.6 33.0 151.7 0.8418 4.4 ------ UNKNOWN
296.8492 57.0517 2.3 12.9 -6.4 0.6882 5.0 ------ UNKNOWN
285.2039 -2.1567 2.9 48.9 -152.9 1.2449 4.0 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
284.276600 962.627900
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
299.6003 35.1896 0.8 39.3 -142.0 9.5773 13.8 0.9 Cyg X-1
308.1180 40.9514 0.9 30.5 -143.3 6.3749 12.6 0.4 Cyg X-3
326.1701 38.3156 3.5 23.3 -170.7 1.3185 3.2 0.4 Cyg X-2
60.6619 40.5666 3.7 47.6 35.5 6.1074 3.1 ------ UNKNOWN
19.6384 63.7513 0.6 17.0 8.3 8.8624 20.5 ------ UNKNOWN
273.4283 62.1386 3.3 37.3 -90.1 4.8526 3.5 ------ UNKNOWN
284.3712 34.9256 3.0 48.0 -129.1 7.6671 3.8 ------ UNKNOWN
Plot creation:
Mon Nov 16 15:48:38 EST 2015