Special notes of this burst
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
280.0036 62.3870 0.0105 22.5632 28.8066 0.2138426 18.157 TRIG_00709357
Foreground time interval of the image:
0.000 0.536 (delta_t = 0.536 [sec])
Background time interval of the image:
-239.048 0.000 (delta_t = 239.048 [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 0.064000
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 0.064000
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 0.064000
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 0.000 sec. to 0.536 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.87936 ( -0.146024 0.152004 )
Norm@50keV : 2.33673E-02 ( -0.00244687 0.00241401 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.30 using 59 PHA bins.
# Reduced chi-squared = 1.321 for 57 degrees of freedom
# Null hypothesis probability = 5.263330e-02
Photon flux (15-150 keV) in 0.536 sec: 3.32465 ( -0.29741 0.2975 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.15158e-07 ( -1.18997e-08 1.20384e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.536 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.120241 ( -0.958008 0.809352 )
Epeak [keV] : 46.3175 ( -5.38246 7.47887 )
Norm@50keV : 0.226702 ( -0.226769 0.546801 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.05 using 59 PHA bins.
# Reduced chi-squared = 1.054 for 56 degrees of freedom
# Null hypothesis probability = 3.647848e-01
Photon flux (15-150 keV) in 0.536 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.02961e-07 ( -1.15553e-08 1.23189e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.536 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : ( )
beta : ( )
Epeak [keV] : ( )
Norm@50keV : ( )
------------------------------------------------------------
Photon flux (15-150 keV) in 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] : 11.4175 (-0.959166 1.04507)
R^2/D10^2 : 1.02311 (-0.289675 0.400131)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.96 using 59 PHA bins.
# Reduced chi-squared = 1.157 for 57 degrees of freedom
# Null hypothesis probability = 1.947282e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.503e-08 2.358e-09
25- 50 4.456e-08 4.974e-09
50-150 3.373e-08 7.003e-09
15-150 9.332e-08 9.273e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 78.9425 (-18.0985 27.6826)
Norm : 16.0021 (-1.96139 2.24336)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.29 using 59 PHA bins.
# Reduced chi-squared = 1.145 for 57 degrees of freedom
# Null hypothesis probability = 2.108362e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.224e-08 2.726e-09
25- 50 3.649e-08 3.524e-09
50-150 5.105e-08 1.464e-08
15-150 1.098e-07 1.726e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.91006 (-1.74907 2.46227)
R1^2/D10^2 : 21.3326 (-17.9819 496.169)
kT2 [keV] : 13.1628 (-1.58467 2.34318)
R2^2/D10^2 : 0.534027 (-0.284938 0.37987)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.74 using 59 PHA bins.
# Reduced chi-squared = 1.032 for 55 degrees of freedom
# Null hypothesis probability = 4.098757e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.982e-08 8.509e-09
25- 50 3.985e-08 1.234e-08
50-150 4.053e-08 1.349e-08
15-150 1.002e-07 2.704e-08
Peak spectrum fit
Power-law model
Time interval is from -0.230 sec. to 0.770 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.77986 ( -0.175744 0.182947 )
Norm@50keV : 1.29257E-02 ( -0.00158055 0.00155826 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.00 using 59 PHA bins.
# Reduced chi-squared = 1.175 for 57 degrees of freedom
# Null hypothesis probability = 1.714841e-01
Photon flux (15-150 keV) in 1 sec: 1.76749 ( -0.19107 0.19116 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.1911e-07 ( -1.47966e-08 1.49996e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.230 sec. to 0.770 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.162224 ( -1.13787 0.92606 )
Epeak [keV] : 50.9773 ( -7.43787 13.6043 )
Norm@50keV : 9.91236E-02 ( -0.0991538 0.308181 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.97 using 59 PHA bins.
# Reduced chi-squared = 1.017 for 56 degrees of freedom
# Null hypothesis probability = 4.388883e-01
Photon flux (15-150 keV) in 1 sec: 1.68375 ( -0.1967 0.19689 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.06987e-07 ( -1.4681e-08 1.57456e-08 ) ergs/cm2
Band function
Time interval is from -0.230 sec. to 0.770 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : ( )
beta : ( )
Epeak [keV] : ( )
Norm@50keV : ( )
------------------------------------------------------------
Photon flux (15-150 keV) in 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] : 12.2324 (-1.2631 1.41529)
R^2/D10^2 : 0.423554 (-0.142171 0.210423)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.07 using 59 PHA bins.
# Reduced chi-squared = 1.089 for 57 degrees of freedom
# Null hypothesis probability = 3.001779e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.342e-08 2.500e-09
25- 50 4.320e-08 5.900e-09
50-150 3.936e-08 9.450e-09
15-150 9.598e-08 1.162e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 96.7664 (-28.4098 52.4452)
Norm : 8.00824 (-1.09605 1.28566)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.20 using 59 PHA bins.
# Reduced chi-squared = 1.074 for 57 degrees of freedom
# Null hypothesis probability = 3.277387e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.093e-08 3.260e-09
25- 50 3.594e-08 4.575e-09
50-150 5.716e-08 2.365e-08
15-150 1.140e-07 2.760e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.87897 (-3.52324 3.08561)
R1^2/D10^2 : 11.6608 (-10.5079 74.3542)
kT2 [keV] : 14.0922 (-1.99095 3.02966)
R2^2/D10^2 : 0.226343 (-0.13254 0.174901)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.96 using 59 PHA bins.
# Reduced chi-squared = 0.9993 for 55 degrees of freedom
# Null hypothesis probability = 4.761769e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.861e-08 8.215e-09
25- 50 3.854e-08 1.227e-08
50-150 4.664e-08 1.905e-08
15-150 1.038e-07 3.257e-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: 1.87936 ( -0.146024 0.152004 )
Norm@50keV : 2.33673E-02 ( -0.00244687 0.00241401 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.30 using 59 PHA bins.
# Reduced chi-squared = 1.321 for 57 degrees of freedom
# Null hypothesis probability = 5.263330e-02
Photon flux (15-150 keV) in 0.536 sec: 3.32445 ( -0.297388 0.297476 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.15139e-07 ( -1.18965e-08 1.20412e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.120019 ( -0.957951 0.809407 )
Epeak [keV] : 46.3172 ( -5.38244 7.47891 )
Norm@50keV : 0.226764 ( -0.22677 0.546801 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.05 using 59 PHA bins.
# Reduced chi-squared = 1.054 for 56 degrees of freedom
# Null hypothesis probability = 3.647848e-01
Photon flux (15-150 keV) in 0.536 sec: 3.17712 ( -0.30292 0.30384 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.0299e-07 ( -1.1569e-08 1.23076e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : ( )
beta : ( )
Epeak [keV] : ( )
Norm@50keV : ( )
------------------------------------------------------------
Photon flux (15-150 keV) in 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) = 3.33e-08
S(50-100 keV) = 3.63e-08
T90 vs. Hardness ratio plot
T90 = 0.479999959468842 sec.
Hardness ratio (energy fluence ratio) = 1.09009
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.44647
Count Ratio (50-100 keV) / (15-25 keV) = 0.660523
Mask shadow pattern
IMX = 3.640871868642091E-01, IMY = -2.002134305618259E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.064000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.064000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.064000
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:
-239.048000 0.000000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.5026 35.3658 1.2 17.9 130.9 2.4336 9.5 2.6 Her X-1
183.5470 60.0519 3.3 33.5 -69.0 1.4736 3.5 ------ UNKNOWN
83.4684 68.9505 2.9 58.8 -26.0 6.2907 4.0 ------ UNKNOWN
188.2681 36.1237 3.1 41.4 -107.1 4.3236 3.8 ------ UNKNOWN
131.3224 67.7338 3.5 50.6 -44.7 4.7991 3.3 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
0.000000 0.536000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.4910 35.3152 12.0 18.0 131.0 -0.0121 -1.0 2.3 Her X-1
280.0036 62.3870 0.6 22.6 28.8 0.2139 18.2 ------ UNKNOWN
226.8019 3.4568 2.2 49.8 -176.1 0.1391 5.3 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
54.652600 723.052000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.4684 35.3586 0.9 31.4 -177.1 4.1882 12.6 1.1 Her X-1
299.6024 35.1898 0.6 29.9 107.0 10.7933 20.1 0.9 Cyg X-1
308.0372 41.0191 3.3 27.1 89.3 1.6157 3.6 5.2 Cyg X-3
326.0460 38.1499 9.3 36.9 69.7 0.9626 1.2 11.9 Cyg X-2
323.9125 49.7196 2.7 26.9 58.0 1.7388 4.3 ------ UNKNOWN
11.8191 50.3406 2.5 47.7 20.0 3.5185 4.5 ------ UNKNOWN
7.9284 58.9267 2.3 39.9 14.1 2.4270 5.0 ------ UNKNOWN
238.5063 18.9485 3.2 52.0 -166.9 3.2435 3.5 ------ UNKNOWN
62.7588 54.5537 2.8 59.5 -15.5 9.8578 4.1 ------ UNKNOWN
Plot creation:
Sun Sep 11 22:45:51 EDT 2016