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
107.6216 -56.2775 0.0277 28.3985 -24.0963 0.7030134 6.945 TRIG_00416135
Foreground time interval of the image:
-3.499 73.701 (delta_t = 77.200 [sec])
Background time interval of the image:
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 64.000000
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 64.000000
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 64.000000
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 -158.968 sec. to 794.772 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.35918 ( -0.157442 0.165905 )
Norm@50keV : 3.55563E-04 ( -4.01001e-05 3.95932e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.59 using 59 PHA bins.
# Reduced chi-squared = 1.116 for 57 degrees of freedom
# Null hypothesis probability = 2.557299e-01
Photon flux (15-150 keV) in 953.7 sec: 6.42501E-02 ( -0.00478287 0.00478495 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.27848e-06 ( -2.90451e-07 2.96494e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -158.968 sec. to 794.772 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.34807 ( -0.15017 0.175948 )
Epeak [keV] : 9999.36 ( )
Norm@50keV : 3.58852E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.61 using 59 PHA bins.
# Reduced chi-squared = 1.136 for 56 degrees of freedom
# Null hypothesis probability = 2.261597e-01
Photon flux (15-150 keV) in 953.7 sec: 6.28617E-02 ( -0.005075 0.0050832 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.1047e-06 ( -3.43351e-07 3.67222e-07 ) ergs/cm2
Band function
Time interval is from -158.968 sec. to 794.772 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.88332 ( -2.75843 1.91154 )
beta : -10.0000 ( 10 20 )
Epeak [keV] : 9.33628 ( -4.21577 18.9689 )
Norm@50keV : 6.90961E-04 ( -0.000176574 0.00129547 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.86 using 59 PHA bins.
# Reduced chi-squared = 1.125 for 55 degrees of freedom
# Null hypothesis probability = 2.445061e-01
Photon flux (15-150 keV) in 953.7 sec: 6.30527E-02 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.14185e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.89200 (-0.6892 0.758257)
R^2/D10^2 : 7.08349E-02 (-0.0222306 0.0326883)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 94.10 using 59 PHA bins.
# Reduced chi-squared = 1.651 for 57 degrees of freedom
# Null hypothesis probability = 1.443613e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.531e-07 8.793e-08
25- 50 1.287e-06 1.159e-07
50-150 3.231e-07 7.906e-08
15-150 2.363e-06 2.112e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 38.7532 (-7.04205 9.31115)
Norm : 0.417231 (-0.0625168 0.0765609)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.39 using 59 PHA bins.
# Reduced chi-squared = 1.112 for 57 degrees of freedom
# Null hypothesis probability = 2.613012e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.038e-07 9.866e-08
25- 50 1.173e-06 9.918e-08
50-150 8.760e-07 2.147e-07
15-150 2.953e-06 2.842e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.89651 (-1.09901 1.10597)
R1^2/D10^2 : 0.375828 (-0.202818 0.689643)
kT2 [keV] : 15.4489 (-3.70354 6.26044)
R2^2/D10^2 : 3.07903E-03 (-0.00234683 0.00440823)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.25 using 59 PHA bins.
# Reduced chi-squared = 1.132 for 55 degrees of freedom
# Null hypothesis probability = 2.339222e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.471e-07 3.306e-07
25- 50 1.092e-06 3.411e-07
50-150 9.981e-07 5.503e-07
15-150 3.038e-06 1.083e-06
Peak spectrum fit
Power-law model
Time interval is from -104.040 sec. to -103.040 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.46639 ( -1.0578 1.03377 )
Norm@50keV : 3.45002E-03 ( -0.00345002 0.0017674 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.13 using 59 PHA bins.
# Reduced chi-squared = 0.9146 for 57 degrees of freedom
# Null hypothesis probability = 6.579152e-01
Photon flux (15-150 keV) in 1 sec: 0.426924 ( -0.222577 0.224205 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.2917e-08 ( -1.80997e-08 1.87679e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -104.040 sec. to -103.040 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.46432 ( )
Epeak [keV] : 9985.67 ( )
Norm@50keV : 3.46765E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.13 using 59 PHA bins.
# Reduced chi-squared = 0.9309 for 56 degrees of freedom
# Null hypothesis probability = 6.220671e-01
Photon flux (15-150 keV) in 1 sec: 0.428036 ( -0.22389 0.221252 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.27753e-08 ( -3.27753e-08 1.87249e-08 ) ergs/cm2
Band function
Time interval is from -104.040 sec. to -103.040 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.89054 ( -4.89054 -4.89054 )
beta : -1.81041 ( 1.81041 1.32994 )
Epeak [keV] : 33.1918 ( -33.1918 38.6795 )
Norm@50keV : 57.8455 ( -29.103 5.52714e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.99 using 59 PHA bins.
# Reduced chi-squared = 0.9453 for 55 degrees of freedom
# Null hypothesis probability = 5.902152e-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] : 11.1055 (-5.50214 47.2893)
R^2/D10^2 : 0.135711 (-0.131142 1.5172)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.00 using 59 PHA bins.
# Reduced chi-squared = 0.9473 for 57 degrees of freedom
# Null hypothesis probability = 5.885091e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.504e-09 2.281e-09
25- 50 1.003e-08 6.765e-09
50-150 7.038e-09 6.115e-09
15-150 2.057e-08 1.394e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-199.363 -199.363)
Norm : 1.75527 (-0.893446 1.54187)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.24 using 59 PHA bins.
# Reduced chi-squared = 0.9165 for 57 degrees of freedom
# Null hypothesis probability = 6.539210e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.371e-09 2.836e-09
25- 50 8.408e-09 5.800e-09
50-150 1.844e-08 1.301e-08
15-150 3.122e-08 2.010e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.52160 (-7.53162 11.5424)
R1^2/D10^2 : 0.451930 (-0.450899 -0.450899)
kT2 [keV] : 46.1623 (-46.1258 -46.1258)
R2^2/D10^2 : 1.02569E-03 (-0.00102775 0.250532)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.41 using 59 PHA bins.
# Reduced chi-squared = 0.9347 for 55 degrees of freedom
# Null hypothesis probability = 6.125557e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.653e-09 2.892e-09
25- 50 8.697e-09 6.180e-09
50-150 2.174e-08 1.162e-08
15-150 3.509e-08 1.663e-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: 2.23130 ( -0.348417 0.391594 )
Norm@50keV : 4.97183E-04 ( -0.000136465 0.000132722 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.41 using 59 PHA bins.
# Reduced chi-squared = 0.9370 for 57 degrees of freedom
# Null hypothesis probability = 6.105294e-01
Photon flux (15-150 keV) in 77.2 sec: 8.36885E-02 ( -0.015308 0.0153089 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.62546e-07 ( -8.21115e-08 8.63752e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.68803 ( -3.02131 0.36385 )
Epeak [keV] : 20.1875 ( )
Norm@50keV : 1.11605E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.14 using 59 PHA bins.
# Reduced chi-squared = 0.9489 for 56 degrees of freedom
# Null hypothesis probability = 5.839600e-01
Photon flux (15-150 keV) in 77.2 sec: 8.23512E-02 ( -0.015741 0.0158541 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.35895e-07 ( -9.693e-08 1.07854e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.70445 ( -4.70445 -4.70445 )
beta : -2.64158 ( -0.859513 0.536932 )
Epeak [keV] : 23.4394 ( -5.43886 4.74953 )
Norm@50keV : 96.9940 ( -17.5084 1.0429e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.33 using 59 PHA bins.
# Reduced chi-squared = 0.9332 for 55 degrees of freedom
# Null hypothesis probability = 6.157868e-01
Photon flux (15-150 keV) in 77.2 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) = 1.07e-06
S(50-100 keV) = 8.33e-07
T90 vs. Hardness ratio plot
T90 = 521.879999935627 sec.
Hardness ratio (energy fluence ratio) = 0.778505
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.828716
Count Ratio (50-100 keV) / (15-25 keV) = 0.320518
Mask shadow pattern
IMX = 4.935501115879957E-01, IMY = 2.207369702498418E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
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:
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-3.499400 73.700590
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.5193 -40.5534 0.5 25.6 30.1 2.1817 22.6 0.4 Vela X-1
170.0118 -60.4729 0.0 3.8 -174.5 0.0649 0.7 12.7 Cen X-3
186.6294 -62.7559 0.7 11.9 -162.4 1.3952 16.3 1.1 GX 301-2
264.7295 -44.3060 5.6 58.1 -152.3 -1.3507 -2.2 8.7 4U 1735-44
123.3855 -17.8292 2.8 50.5 32.1 1.8567 4.2 ------ UNKNOWN
107.6215 -56.2776 1.6 28.4 -24.1 0.7031 7.0 ------ UNKNOWN
104.4637 -57.7335 2.2 29.2 -28.5 0.5389 5.3 ------ UNKNOWN
333.9008 -78.8780 2.9 41.2 -99.3 1.9600 4.0 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
126.300600 738.300590
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.5287 -40.5473 0.4 24.0 80.2 11.8794 26.9 0.4 Vela X-1
170.3913 -60.4918 492.7 31.9 143.2 -0.0123 -0.0 8.2 Cen X-3
186.6444 -62.7475 1.1 38.0 152.3 8.0238 10.6 1.4 GX 301-2
150.0860 -32.5052 3.5 37.6 88.2 3.4494 3.3 ------ UNKNOWN
128.7558 -34.7099 2.4 25.9 61.9 2.0429 4.8 ------ UNKNOWN
107.6993 -56.2623 1.0 0.0 111.2 4.0086 11.7 ------ UNKNOWN
356.3804 -65.1750 2.7 47.9 -129.0 7.8780 4.2 ------ UNKNOWN
Plot creation:
Thu Nov 12 16:38:22 EST 2015