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
61.7491 -71.9361 0.0094 14.5526 109.1566 0.8368551 20.445 TRIG_00732526
Foreground time interval of the image:
-0.608 12.365 (delta_t = 12.973 [sec])
Background time interval of the image:
-617.735 -598.699 (delta_t = 19.036 [sec])
-239.936 -0.608 (delta_t = 239.328 [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 1.024000
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 1.024000
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 1.024000
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 -0.608 sec. to 22.932 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.57293 ( -0.123133 0.124996 )
Norm@50keV : 3.24103E-03 ( -0.000240956 0.000239348 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.75 using 59 PHA bins.
# Reduced chi-squared = 1.329 for 57 degrees of freedom
# Null hypothesis probability = 4.898541e-02
Photon flux (15-150 keV) in 23.54 sec: 0.413084 ( -0.029125 0.029148 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.16073e-07 ( -5.77688e-08 5.84364e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.608 sec. to 22.932 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.740936 ( -0.632466 0.549575 )
Epeak [keV] : 71.8058 ( -13.8714 48.3201 )
Norm@50keV : 8.81318E-03 ( -0.00419825 0.00985906 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.66 using 59 PHA bins.
# Reduced chi-squared = 1.226 for 56 degrees of freedom
# Null hypothesis probability = 1.193269e-01
Photon flux (15-150 keV) in 23.54 sec: 0.396412 ( -0.031022 0.031012 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.63463e-07 ( -6.57588e-08 6.71483e-08 ) ergs/cm2
Band function
Time interval is from -0.608 sec. to 22.932 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] : 13.6012 (-1.09242 1.20774)
R^2/D10^2 : 6.57336E-02 (-0.0172672 0.0230105)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 92.73 using 59 PHA bins.
# Reduced chi-squared = 1.627 for 57 degrees of freedom
# Null hypothesis probability = 1.945437e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.061e-08 7.839e-09
25- 50 2.189e-07 1.709e-08
50-150 2.626e-07 4.095e-08
15-150 5.421e-07 4.590e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 172.689 (-51.59 -172.656)
Norm : 1.69589 (-0.125737 0.138594)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.11 using 59 PHA bins.
# Reduced chi-squared = 1.248 for 57 degrees of freedom
# Null hypothesis probability = 9.902259e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.011e-07 1.254e-08
25- 50 1.911e-07 4.826e-08
50-150 3.987e-07 1.842e-07
15-150 6.909e-07 2.307e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.05138 (-2.55262 2.79397)
R1^2/D10^2 : 0.359575 (-0.214072 1.25292)
kT2 [keV] : 20.9700 (-4.66225 13.5869)
R2^2/D10^2 : 1.05705E-02 (-0.00904124 0.0195686)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.94 using 59 PHA bins.
# Reduced chi-squared = 1.272 for 55 degrees of freedom
# Null hypothesis probability = 8.460934e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.881e-08 3.576e-08
25- 50 2.009e-07 8.051e-08
50-150 3.642e-07 1.798e-07
15-150 6.539e-07 2.185e-07
Peak spectrum fit
Power-law model
Time interval is from 1.632 sec. to 2.632 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.27602 ( -0.224978 0.223172 )
Norm@50keV : 9.03707E-03 ( -0.00119414 0.0011913 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.96 using 59 PHA bins.
# Reduced chi-squared = 0.9467 for 57 degrees of freedom
# Null hypothesis probability = 5.897724e-01
Photon flux (15-150 keV) in 1 sec: 1.07354 ( -0.142008 0.14214 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.98463e-08 ( -1.33994e-08 1.35869e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.632 sec. to 2.632 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.877058 ( -0.944472 0.516212 )
Epeak [keV] : 141.697 ( -141.696 -141.696 )
Norm@50keV : 1.43887E-02 ( -0.00634139 0.0277014 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.23 using 59 PHA bins.
# Reduced chi-squared = 0.9506 for 56 degrees of freedom
# Null hypothesis probability = 5.803140e-01
Photon flux (15-150 keV) in 1 sec: 1.05740 ( -0.145906 0.1457 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.69441e-08 ( -1.48749e-08 1.47533e-08 ) ergs/cm2
Band function
Time interval is from 1.632 sec. to 2.632 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] : 16.5036 (-2.89448 3.69814)
R^2/D10^2 : 9.11705E-02 (-0.0446119 0.0840391)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.21 using 59 PHA bins.
# Reduced chi-squared = 1.144 for 57 degrees of freedom
# Null hypothesis probability = 2.129216e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.097e-09 1.336e-09
25- 50 2.201e-08 4.965e-09
50-150 4.239e-08 1.134e-08
15-150 6.950e-08 1.428e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-51.1516 -200)
Norm : 4.40315 (-0.581472 0.581472)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.07 using 59 PHA bins.
# Reduced chi-squared = 1.001 for 57 degrees of freedom
# Null hypothesis probability = 4.722970e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.097e-08 6.230e-09
25- 50 2.110e-08 1.159e-08
50-150 4.627e-08 2.577e-08
15-150 7.833e-08 4.329e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.88500 (-2.37267 3.25995)
R1^2/D10^2 : 0.693845 (-0.457058 1.53783)
kT2 [keV] : 31.4027 (-9.93001 38.0287)
R2^2/D10^2 : 8.63758E-03 (-0.00774835 0.0233414)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.16 using 59 PHA bins.
# Reduced chi-squared = 0.9301 for 55 degrees of freedom
# Null hypothesis probability = 6.222677e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.011e-09 5.087e-09
25- 50 2.130e-08 1.116e-08
50-150 5.889e-08 3.341e-08
15-150 8.921e-08 4.644e-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: 1.55869 ( -0.125649 0.127653 )
Norm@50keV : 4.29249E-03 ( -0.000330244 0.000328019 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.85 using 59 PHA bins.
# Reduced chi-squared = 1.085 for 57 degrees of freedom
# Null hypothesis probability = 3.072618e-01
Photon flux (15-150 keV) in 12.97 sec: 0.544783 ( -0.0396897 0.0397112 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.2348e-07 ( -4.38649e-08 4.43381e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.615778 ( -0.663901 0.573666 )
Epeak [keV] : 69.4436 ( -12.5268 36.5052 )
Norm@50keV : 1.33800E-02 ( -0.00658688 0.0161594 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.33 using 59 PHA bins.
# Reduced chi-squared = 0.9523 for 56 degrees of freedom
# Null hypothesis probability = 5.766852e-01
Photon flux (15-150 keV) in 12.97 sec: 0.521057 ( -0.042023 0.042035 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.81039e-07 ( -4.94624e-08 5.06634e-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) = 1.83e-07
S(50-100 keV) = 2.47e-07
T90 vs. Hardness ratio plot
T90 = 20.2959999442101 sec.
Hardness ratio (energy fluence ratio) = 1.34973
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.44165
Count Ratio (50-100 keV) / (15-25 keV) = 0.985551
Mask shadow pattern
IMX = -8.518722869117754E-02, IMY = -2.452227769607561E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
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:
-617.735390 -598.698900
-239.936000 -0.608000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.4875 -60.5651 2.7 46.2 162.2 2.2830 4.2 6.1 Cen X-3
186.6418 -62.7809 87.2 44.8 173.2 0.0576 0.1 0.8 GX 301-2
106.3770 -53.1876 2.3 41.2 112.1 4.3684 4.9 ------ UNKNOWN
69.8743 -41.9374 3.5 40.5 70.8 2.8973 3.3 ------ UNKNOWN
33.1253 -19.4156 3.8 54.2 21.0 3.2990 3.0 ------ UNKNOWN
26.6529 -20.4134 2.5 52.5 13.5 3.4420 4.7 ------ UNKNOWN
302.7793 -51.1457 3.0 36.2 -95.9 1.9725 3.8 ------ UNKNOWN
263.0323 -50.4592 2.9 48.0 -129.0 3.9720 4.0 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-0.608000 12.364610
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.6974 -60.5401 0.0 46.2 162.4 -0.0623 -0.6 12.3 Cen X-3
186.7757 -62.8715 8.6 44.7 173.3 0.1068 1.3 6.9 GX 301-2
61.7491 -71.9361 0.6 14.6 109.2 0.8368 20.4 ------ UNKNOWN
177.9912 -74.3639 2.4 33.0 170.0 0.2443 4.8 ------ UNKNOWN
215.5980 -54.0722 2.1 52.6 -166.2 0.6782 5.6 ------ UNKNOWN
220.8575 -54.0661 2.5 52.1 -162.3 0.5558 4.7 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
48.164600 104.243500
105.064000 962.134000
1878.064000 2000.000000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.3550 -60.6595 2.3 38.8 172.7 4.8188 5.0 2.5 Cen X-3
186.7360 -62.9416 11.1 40.1 -174.8 0.9010 1.0 10.5 GX 301-2
60.3657 -58.2029 3.8 13.7 37.8 1.7103 3.1 ------ UNKNOWN
201.7047 -46.9527 2.6 57.8 -170.6 17.9299 4.4 ------ UNKNOWN
269.3655 -61.3432 3.6 45.4 -121.2 9.4306 3.2 ------ UNKNOWN
Plot creation:
Mon Feb 13 11:18:16 EST 2017