Special notes of this burst
Image
Pre-slew 15.0-50.0 keV image (Event data)
#RAcent DECcent POSerr Theta Phi Peak_Cts SNR Name
296.128 55.793 0.000 15.787 140.560 0.412 5.929 TRIG_00419932
Image time interval: 0.000 to 64.000 [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 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 -0.732 sec. to 68.620 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.29427 ( -0.310503 0.307848 )
Norm@50keV : 7.22951E-04 ( -0.000134164 0.000133511 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.46 using 59 PHA bins.
# Reduced chi-squared = 0.9555 for 57 degrees of freedom
# Null hypothesis probability = 5.708099e-01
Photon flux (15-150 keV) in 69.35 sec: 8.61598E-02 ( -0.0158021 0.0158196 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.96135e-07 ( -1.03396e-07 1.06171e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.732 sec. to 68.620 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.243045 ( -1.98775 1.18137 )
Epeak [keV] : 79.4242 ( -24.79 -79.4199 )
Norm@50keV : 2.56963E-03 ( -0.00256999 0.0262702 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.68 using 59 PHA bins.
# Reduced chi-squared = 0.9407 for 56 degrees of freedom
# Null hypothesis probability = 6.013054e-01
Photon flux (15-150 keV) in 69.35 sec: 8.23074E-02 ( -0.0166661 0.0166093 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.45583e-07 ( -1.18428e-07 1.24732e-07 ) ergs/cm2
Band function
Time interval is from -0.732 sec. to 68.620 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.01228 ( -4.26246 -4.26246 )
beta : -1.69743 ( -1.03784 0.464722 )
Epeak [keV] : 38.7123 ( -35.6466 134.236 )
Norm@50keV : 0.398554 ( -0.398356 4.36017 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.83 using 59 PHA bins.
# Reduced chi-squared = 0.9424 for 55 degrees of freedom
# Null hypothesis probability = 5.964357e-01
Photon flux (15-150 keV) in 69.35 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 4.62388e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 15.0265 (-2.97238 4.07479)
R^2/D10^2 : 1.02345E-02 (-0.00573994 0.0116826)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.00 using 59 PHA bins.
# Reduced chi-squared = 0.9649 for 57 degrees of freedom
# Null hypothesis probability = 5.504034e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.354e-08 1.136e-08
25- 50 1.335e-07 3.901e-08
50-150 2.053e-07 7.982e-08
15-150 3.723e-07 1.162e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-81.7045 -199.363)
Norm : 0.353202 (-0.064649 0.064649)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.25 using 59 PHA bins.
# Reduced chi-squared = 0.9693 for 57 degrees of freedom
# Null hypothesis probability = 5.408967e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.099e-08 3.589e-08
25- 50 1.173e-07 6.762e-08
50-150 2.573e-07 1.490e-07
15-150 4.356e-07 2.559e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.86156 (-7.19751 5.48501)
R1^2/D10^2 : 2.79906E-02 (-0.0240328 0.279794)
kT2 [keV] : 30.2904 (-34.5627 -38.3615)
R2^2/D10^2 : 5.67526E-04 (-0.000233841 0.00382715)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.90 using 59 PHA bins.
# Reduced chi-squared = 0.9436 for 55 degrees of freedom
# Null hypothesis probability = 5.939769e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.387e-08 2.984e-08
25- 50 1.280e-07 7.715e-08
50-150 2.713e-07 1.570e-07
15-150 4.432e-07 2.370e-07
Peak spectrum fit
Power-law model
Time interval is from 28.704 sec. to 29.704 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.28629 ( -1.28514 1.10884 )
Norm@50keV : 2.32584E-03 ( -0.00121587 0.00109259 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.30 using 59 PHA bins.
# Reduced chi-squared = 0.9702 for 57 degrees of freedom
# Null hypothesis probability = 5.391155e-01
Photon flux (15-150 keV) in 1 sec: 0.276751 ( -0.276751 0.130876 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.30734e-08 ( -2.30736e-08 1.40589e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 28.704 sec. to 29.704 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.42604 ( )
Epeak [keV] : 140.917 ( )
Norm@50keV : 5.55322E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.42 using 59 PHA bins.
# Reduced chi-squared = 0.9718 for 56 degrees of freedom
# Null hypothesis probability = 5.347685e-01
Photon flux (15-150 keV) in 1 sec: 0.278052 ( -0.130021 0.129738 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.2554e-16 ( 0 0 ) ergs/cm2
Band function
Time interval is from 28.704 sec. to 29.704 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.97877 ( -4.97877 -4.97877 )
beta : -1.99890 ( 1.9989 2.12751 )
Epeak [keV] : 28.6641 ( -28.6641 91.9531 )
Norm@50keV : 118.314 ( -53.5928 2.60343e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.67 using 59 PHA bins.
# Reduced chi-squared = 0.9940 for 55 degrees of freedom
# Null hypothesis probability = 4.871622e-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] : 7.35790 (-2.39412 5.18237)
R^2/D10^2 : 0.410636 (-0.409965 1.52166)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.73 using 59 PHA bins.
# Reduced chi-squared = 0.9953 for 57 degrees of freedom
# Null hypothesis probability = 4.849912e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.750e-09 2.434e-09
25- 50 5.646e-09 3.983e-09
50-150 1.117e-09 1.057e-09
15-150 1.051e-08 6.800e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-199.363 -199.363)
Norm : 1.11630 (-0.531349 0.531349)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.92 using 59 PHA bins.
# Reduced chi-squared = 0.9810 for 57 degrees of freedom
# Null hypothesis probability = 5.158080e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.780e-09 1.895e-09
25- 50 5.347e-09 3.758e-09
50-150 1.173e-08 8.260e-09
15-150 1.985e-08 1.273e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 200.000 (-200 -200)
R1^2/D10^2 : 7.86465E-05 (-4.90387e-05 0.000287064)
kT2 [keV] : 6.41692 (-2.12611 3.39161)
R2^2/D10^2 : 0.615971 (-0.40007 1.29254)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.73 using 59 PHA bins.
#Fit statistic : Chi-Squared = 49.98 using 59 PHA bins.
# Reduced chi-squared = 1.032 for 55 degrees of freedom
# Reduced chi-squared = 0.9088 for 55 degrees of freedom
# Null hypothesis probability = 4.101555e-01
# Null hypothesis probability = 6.663050e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.747e-09 1.918e-01
25- 50 5.650e-09 1.845e+00
50-150 1.121e-09 5.235e+01
15-150 1.052e-08 4.020e+01
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: 1.29427 ( -0.310503 0.307848 )
Norm@50keV : 7.22951E-04 ( -0.000134164 0.000133511 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.46 using 59 PHA bins.
# Reduced chi-squared = 0.9555 for 57 degrees of freedom
# Null hypothesis probability = 5.708099e-01
Photon flux (15-150 keV) in 69.35 sec: 8.61598E-02 ( -0.0158021 0.0158196 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.96135e-07 ( -1.03396e-07 1.06171e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.243045 ( -1.98775 1.18137 )
Epeak [keV] : 79.4242 ( -24.79 -79.4199 )
Norm@50keV : 2.56963E-03 ( -0.00256999 0.0262702 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.68 using 59 PHA bins.
# Reduced chi-squared = 0.9407 for 56 degrees of freedom
# Null hypothesis probability = 6.013054e-01
Photon flux (15-150 keV) in 69.35 sec: 8.23074E-02 ( -0.0166661 0.0166093 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.45583e-07 ( -1.18428e-07 1.24732e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.01228 ( -4.26246 -4.26246 )
beta : -1.69743 ( -1.03784 0.464722 )
Epeak [keV] : 38.7123 ( -35.6466 186.496 )
Norm@50keV : 0.398554 ( -0.398356 4.36011 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.83 using 59 PHA bins.
# Reduced chi-squared = 0.9424 for 55 degrees of freedom
# Null hypothesis probability = 5.964357e-01
Photon flux (15-150 keV) in 69.35 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 4.62388e-07 ( 0 0 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 1.10e-07
S(50-100 keV) = 1.80e-07
T90 vs. Hardness ratio plot
T90 = 62.9799999594688 sec.
Hardness ratio (energy fluence ratio) = 1.63636
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.72197
Count Ratio (50-100 keV) / (15-25 keV) = 1.18206
Mask shadow pattern
IMX = -0.218346559425, IMY = -0.179608973732
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:
-6.299410 -0.732000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
288.9984 10.8441 0.0 41.6 45.5 0.0681 0.9 13.3 GRS 1915+105
299.5766 35.1854 1.3 16.1 58.5 0.2391 8.6 1.2 Cyg X-1
308.0779 40.8899 12.2 7.3 54.9 -0.0237 -0.9 4.0 Cyg X-3
326.1783 38.3156 29.6 10.8 -46.2 -0.0099 -0.4 0.5 Cyg X-2
322.1166 0.5180 2.2 45.6 -5.1 0.2512 5.2 ------ UNKNOWN
34.0450 62.3201 2.3 45.6 -136.3 0.3236 5.0 ------ UNKNOWN
23.6457 50.6970 2.4 44.0 -118.1 0.5072 4.9 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-0.732000 68.620000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
288.6752 10.8901 3.3 41.7 46.0 3.3438 3.5 8.0 GRS 1915+105
299.7831 35.1235 6.1 16.0 58.0 -0.6648 -1.9 10.6 Cyg X-1
308.0630 40.9399 6.5 7.3 55.4 0.5809 1.8 2.3 Cyg X-3
326.1860 38.2520 7.7 10.9 -45.9 0.4867 1.5 4.2 Cyg X-2
329.7998 -10.4438 2.3 57.6 -12.5 9.0438 5.0 ------ UNKNOWN
7.4629 46.3679 2.2 35.3 -106.1 3.2337 5.1 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
114.100580 963.022800
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.5871 35.2667 5.5 34.8 79.8 -2.8185 -2.1 7.8 Her X-1
288.7841 10.9534 1.8 45.2 18.4 7.5305 6.6 1.0 GRS 1915+105
299.5900 35.2031 0.2 20.7 0.2 33.2225 61.0 0.1 Cyg X-1
308.1213 40.9479 1.2 16.8 -24.7 4.8930 9.2 0.6 Cyg X-3
326.2448 38.3483 5.8 26.6 -53.5 1.3666 2.0 3.8 Cyg X-2
166.8529 63.6758 2.8 54.3 163.2 13.1281 4.1 ------ UNKNOWN
201.9846 68.1374 2.5 41.2 153.9 5.4507 4.5 ------ UNKNOWN
253.6127 68.0588 2.5 22.8 147.5 2.8708 4.7 ------ UNKNOWN
139.0470 65.8395 3.0 57.1 177.3 15.2692 3.8 ------ UNKNOWN
300.9364 0.6554 2.2 55.3 2.3 11.2965 5.2 ------ UNKNOWN
307.3559 -0.2596 3.4 56.8 -5.3 8.5895 3.4 ------ UNKNOWN
329.3153 30.3932 3.0 34.5 -48.3 2.7917 3.8 ------ UNKNOWN
322.9771 5.6850 2.5 54.5 -25.3 8.6641 4.6 ------ UNKNOWN
331.1490 15.4162 2.7 48.4 -39.5 7.4339 4.4 ------ UNKNOWN
339.6713 21.5179 3.1 47.0 -53.1 10.4325 3.7 ------ UNKNOWN
3.3343 46.9703 4.2 41.1 -98.8 9.1843 2.8 ------ UNKNOWN
Plot creation:
Thu Nov 12 13:20:24 EST 2015