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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
20.3716 -0.6788 0.0163 25.6685 138.0088 7.5820278 11.803 TRIG_00670793
Foreground time interval of the image:
-60.000 113.000 (delta_t = 173.000 [sec])
Background time interval of the image:
-78.099 -60.000 (delta_t = 18.099 [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 66.944000 to 67.968000
8 ms binning
From T100_start-3 s to T100_start+3 s
Blue+Cyan dotted lines: Time interval of the scaled map
From 66.944000 to 67.968000
2 ms binning
From T100_start-1 s to T100_start+1 s
Blue+Cyan dotted lines: Time interval of the scaled map
From 66.944000 to 67.968000
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 -60.000 sec. to 113.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.15358 ( -0.111794 0.114852 )
Norm@50keV : 1.96650E-03 ( -0.000140414 0.000138615 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.70 using 59 PHA bins.
# Reduced chi-squared = 1.118 for 57 degrees of freedom
# Null hypothesis probability = 2.526412e-01
Photon flux (15-150 keV) in 173 sec: 0.317849 ( -0.017963 0.017989 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.17991e-06 ( -1.99846e-07 2.02029e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -60.000 sec. to 113.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.93214 ( -1.99494 -1.99494 )
Epeak [keV] : 12.6147 ( -11.1173 32.5864 )
Norm@50keV : 2.64057E-03 ( -0.000486236 0.00238342 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.85 using 59 PHA bins.
# Reduced chi-squared = 1.122 for 56 degrees of freedom
# Null hypothesis probability = 2.467039e-01
Photon flux (15-150 keV) in 173 sec: 0.317558 ( -0.01783 0.009683 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.09497e-06 ( -2.49879e-07 2.34661e-07 ) ergs/cm2
Band function
Time interval is from -60.000 sec. to 113.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 2.88921 ( -5.68925 -3.90009 )
beta : -2.26784 ( -0.167847 0.144216 )
Epeak [keV] : 22.5660 ( -4.1131 8.89841 )
Norm@50keV : 15.5965 ( -15.5938 283.782 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.16 using 59 PHA bins.
# Reduced chi-squared = 1.076 for 55 degrees of freedom
# Null hypothesis probability = 3.263800e-01
Photon flux (15-150 keV) in 173 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] : 9.13342 ( )
R^2/D10^2 : 0.196439 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 132.46 using 59 PHA bins.
# Reduced chi-squared = 2.3238 for 57 degrees of freedom
# Null hypothesis probability = 6.072031e-08
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.561e-07 5.631e-08
25- 50 1.209e-06 7.629e-08
50-150 4.824e-07 8.503e-08
15-150 2.248e-06 1.436e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 53.2417 (-8.22484 10.9881)
Norm : 1.70760 (-0.170573 0.206426)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.81 using 59 PHA bins.
# Reduced chi-squared = 1.172 for 57 degrees of freedom
# Null hypothesis probability = 1.755833e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.322e-07 5.640e-08
25- 50 1.075e-06 5.917e-08
50-150 1.106e-06 1.515e-07
15-150 2.913e-06 1.825e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.74382 (-0.848443 0.905588)
R1^2/D10^2 : 0.969310 (-0.403221 0.815387)
kT2 [keV] : 20.4330 (-4.28846 7.21834)
R2^2/D10^2 : 5.65140E-03 (-0.00380676 0.00906614)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.10 using 59 PHA bins.
# Reduced chi-squared = 1.129 for 55 degrees of freedom
# Null hypothesis probability = 2.379216e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.666e-07 1.419e-07
25- 50 1.018e-06 1.659e-07
50-150 1.271e-06 5.031e-07
15-150 3.055e-06 6.142e-07
Peak spectrum fit
Power-law model
Time interval is from 76.000 sec. to 77.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.05606 ( -0.310593 0.345396 )
Norm@50keV : 7.58110E-03 ( -0.00185723 0.00180243 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.29 using 59 PHA bins.
# Reduced chi-squared = 1.233 for 57 degrees of freedom
# Null hypothesis probability = 1.111157e-01
Photon flux (15-150 keV) in 1 sec: 1.16765 ( -0.216935 0.21683 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.01843e-08 ( -1.55645e-08 1.60897e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 76.000 sec. to 77.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.684480 ( -2.02823 1.3349 )
Epeak [keV] : 37.7416 ( -31.339 30.6903 )
Norm@50keV : 5.09811E-02 ( -0.0510202 0.933175 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.46 using 59 PHA bins.
# Reduced chi-squared = 1.205 for 56 degrees of freedom
# Null hypothesis probability = 1.402910e-01
Photon flux (15-150 keV) in 1 sec: 1.14225 ( -0.215671 0.21686 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.31815e-08 ( -1.50122e-08 1.70306e-08 ) ergs/cm2
Band function
Time interval is from 76.000 sec. to 77.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.92978 ( -6.63398 -4.92978 )
beta : -2.49748 ( -0.833004 0.48107 )
Epeak [keV] : 25.7790 ( -5.97973 4.88634 )
Norm@50keV : 1041.30 ( -188.515 5391.75 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.14 using 59 PHA bins.
# Reduced chi-squared = 1.202 for 55 degrees of freedom
# Null hypothesis probability = 1.445077e-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] : 9.26513 (-1.82496 2.20081)
R^2/D10^2 : 0.766401 (-0.431189 1.01184)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.89 using 59 PHA bins.
# Reduced chi-squared = 1.244 for 57 degrees of freedom
# Null hypothesis probability = 1.020967e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.299e-08 3.999e-09
25- 50 2.888e-08 8.515e-09
50-150 1.203e-08 6.234e-09
15-150 5.391e-08 1.599e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 56.6520 (-21.6676 45.3062)
Norm : 6.42607 (-1.69262 2.27818)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.93 using 59 PHA bins.
# Reduced chi-squared = 1.192 for 57 degrees of freedom
# Null hypothesis probability = 1.524164e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.599e-08 3.990e-09
25- 50 2.390e-08 6.530e-09
50-150 2.590e-08 1.286e-08
15-150 6.580e-08 1.835e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.84381 (-2.54235 3.15456)
R1^2/D10^2 : 2.94517 (-2.23218 19.5943)
kT2 [keV] : 16.1402 (-9.96654 31.8936)
R2^2/D10^2 : 5.47625E-02 (-0.0563458 0.464155)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.54 using 59 PHA bins.
# Reduced chi-squared = 1.210 for 55 degrees of freedom
# Null hypothesis probability = 1.369149e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.580e-08 8.905e-09
25- 50 2.458e-08 1.306e-08
50-150 2.379e-08 1.425e-08
15-150 6.417e-08 3.218e-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: 2.15358 ( -0.111794 0.114852 )
Norm@50keV : 1.96650E-03 ( -0.000140414 0.000138615 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.70 using 59 PHA bins.
# Reduced chi-squared = 1.118 for 57 degrees of freedom
# Null hypothesis probability = 2.526412e-01
Photon flux (15-150 keV) in 173 sec: 0.317820 ( -0.0179604 0.0179866 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.17931e-06 ( -1.99953e-07 2.02022e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.92356 ( -0.483452 0.0802855 )
Epeak [keV] : 13.6899 ( -11.4934 30.0745 )
Norm@50keV : 2.66980E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.85 using 59 PHA bins.
# Reduced chi-squared = 1.122 for 56 degrees of freedom
# Null hypothesis probability = 2.467562e-01
Photon flux (15-150 keV) in 173 sec: 0.313759 ( -0.01937 0.01935 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.09532e-06 ( -2.4976e-07 2.52303e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.38688 ( -3.14338 -1.39405 )
beta : -2.27135 ( -0.179497 0.153371 )
Epeak [keV] : 23.4686 ( -4.91528 6.3117 )
Norm@50keV : 0.910405 ( -0.959238 298.401 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.15 using 59 PHA bins.
# Reduced chi-squared = 1.075 for 55 degrees of freedom
# Null hypothesis probability = 3.265739e-01
Photon flux (15-150 keV) in 173 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) = 9.96e-07
S(50-100 keV) = 8.96e-07
T90 vs. Hardness ratio plot
T90 = 137 sec.
Hardness ratio (energy fluence ratio) = 0.899598
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.961861
Count Ratio (50-100 keV) / (15-25 keV) = 0.430447
Mask shadow pattern
IMX = -3.571980691060386E-01, IMY = -3.215230073956977E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 66.944000 to 67.968000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 66.944000 to 67.968000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 66.944000 to 67.968000
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:
-78.099400 -60.000000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
299.6348 35.1820 3.0 59.6 -14.6 1.1296 3.8 2.5 Cyg X-1
308.1146 41.0065 11.9 55.6 -5.3 0.1630 1.0 3.2 Cyg X-3
326.2110 38.1489 5.5 42.7 2.6 -0.1763 -2.1 10.5 Cyg X-2
39.2215 -4.8048 2.3 44.9 138.3 0.9021 4.9 ------ UNKNOWN
4.1964 33.3539 2.2 30.0 51.9 0.4161 5.3 ------ UNKNOWN
352.8471 9.0743 2.2 5.1 9.2 0.2323 5.3 ------ UNKNOWN
314.1982 40.9774 2.5 51.7 -2.4 0.5207 4.7 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-60.000000 113.000000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
299.6700 35.1537 4.3 59.5 -14.7 -7.9790 -2.7 4.9 Cyg X-1
308.1148 41.0018 9.5 55.6 -5.3 -2.0374 -1.2 3.0 Cyg X-3
326.1680 38.2254 5.9 42.8 2.6 1.6186 2.0 5.8 Cyg X-2
34.8941 15.4269 2.3 40.5 108.3 9.6238 5.0 ------ UNKNOWN
27.8268 4.8918 2.4 32.5 124.9 4.0856 4.7 ------ UNKNOWN
344.0986 42.9468 2.2 39.6 24.0 4.2472 5.2 ------ UNKNOWN
20.3716 -0.6788 1.0 25.7 138.0 7.5803 11.8 ------ UNKNOWN
343.9522 27.7442 2.4 25.5 13.1 2.6456 4.8 ------ UNKNOWN
312.3906 -4.0609 2.4 43.7 -64.0 8.9568 4.9 ------ UNKNOWN
336.2469 -37.1467 2.5 45.3 -121.8 8.7873 4.5 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
253.900600 1029.169300
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.6778 -60.5293 0.0 44.9 165.5 -1.7363 -1.2 12.1 Cen X-3
186.5920 -62.7400 3.0 43.5 176.6 4.4276 3.9 2.5 GX 301-2
154.8114 -52.9721 3.1 50.7 152.1 10.7602 3.7 ------ UNKNOWN
42.8593 -35.5971 2.6 40.7 38.8 5.0185 4.4 ------ UNKNOWN
190.5986 -50.8758 3.5 55.5 179.0 10.1473 3.3 ------ UNKNOWN
192.7880 -52.1777 3.9 54.2 -179.4 7.1329 3.0 ------ UNKNOWN
194.1276 -72.2002 3.1 34.2 -178.4 2.5797 3.7 ------ UNKNOWN
202.9381 -48.4534 2.7 57.7 -171.4 13.3818 4.2 ------ UNKNOWN
280.5070 -50.9410 3.5 42.7 -110.5 8.2987 3.3 ------ UNKNOWN
Plot creation:
Fri Mar 18 11:55:48 EDT 2016