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
221.0334 -25.6133 0.0092 31.2218 -59.4135 0.4804796 20.884 TRIG_00653838
Foreground time interval of the image:
-0.032 1.020 (delta_t = 1.052 [sec])
Background time interval of the image:
-532.767 -516.886 (delta_t = 15.881 [sec])
-239.968 -0.032 (delta_t = 239.936 [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 0.512000
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 0.512000
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 0.512000
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 -0.032 sec. to 1.020 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.711615 ( -0.162064 0.155385 )
Norm@50keV : 2.83488E-02 ( -0.00252151 0.00246537 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.16 using 59 PHA bins.
# Reduced chi-squared = 0.8099 for 57 degrees of freedom
# Null hypothesis probability = 8.470336e-01
Photon flux (15-150 keV) in 1.052 sec: 3.27394 ( -0.270473 0.271513 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.62136e-07 ( -2.9504e-08 2.96077e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.032 sec. to 1.020 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.711563 ( -0.171575 0.149391 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 2.86234E-02 ( -0.00234574 0.0064062 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.26 using 59 PHA bins.
# Reduced chi-squared = 0.8261 for 56 degrees of freedom
# Null hypothesis probability = 8.200948e-01
Photon flux (15-150 keV) in 1.052 sec: 3.28306 ( -0.27667 0.26243 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.6232e-07 ( -2.95864e-08 2.82599e-08 ) ergs/cm2
Band function
Time interval is from -0.032 sec. to 1.020 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.946251 ( 0.946265 0.946265 )
beta : -0.711605 ( -0.155466 0.16216 )
Epeak [keV] : 16.6521 ( -16.6517 -16.6517 )
Norm@50keV : 3.86835E-02 ( -0.0127547 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.16 using 59 PHA bins.
# Reduced chi-squared = 0.8394 for 55 degrees of freedom
# Null hypothesis probability = 7.960948e-01
Photon flux (15-150 keV) in 1.052 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] : 31.9395 (-4.16656 5.31774)
R^2/D10^2 : 4.10585E-02 (-0.0139939 0.0198103)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 80.61 using 59 PHA bins.
# Reduced chi-squared = 1.414 for 57 degrees of freedom
# Null hypothesis probability = 2.147347e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.627e-09 1.158e-09
25- 50 4.191e-08 6.081e-09
50-150 2.939e-07 3.419e-08
15-150 3.425e-07 3.566e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 13.3294 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 131.09 using 59 PHA bins.
# Reduced chi-squared = 2.2998 for 57 degrees of freedom
# Null hypothesis probability = 9.107889e-08
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.492e-08 5.370e-09
25- 50 6.717e-08 1.371e-08
50-150 1.473e-07 7.091e-08
15-150 2.494e-07 1.208e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.01073 (-2.43114 3.20867)
R1^2/D10^2 : 1.03721 (-0.625858 1.78044)
kT2 [keV] : 59.1244 (-17.0704 64.5045)
R2^2/D10^2 : 7.63384E-03 (-0.00480848 0.0102339)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.00 using 59 PHA bins.
# Reduced chi-squared = 0.7818 for 55 degrees of freedom
# Null hypothesis probability = 8.799755e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.994e-08 9.390e-09
25- 50 5.682e-08 2.322e-08
50-150 2.989e-07 1.439e-07
15-150 3.757e-07 1.503e-07
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 1.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.713312 ( -0.162724 0.15605 )
Norm@50keV : 2.90384E-02 ( -0.00259049 0.00253366 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.17 using 59 PHA bins.
# Reduced chi-squared = 0.8802 for 57 degrees of freedom
# Null hypothesis probability = 7.270263e-01
Photon flux (15-150 keV) in 1 sec: 3.35319 ( -0.278259 0.279281 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.52343e-07 ( -2.89339e-08 2.90404e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 1.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.705308 ( -0.28428 0.146072 )
Epeak [keV] : 1.00000E+04 ( -10000 -10000 )
Norm@50keV : 2.92582E-02 ( -0.002599 0.00225887 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.26 using 59 PHA bins.
# Reduced chi-squared = 0.8975 for 56 degrees of freedom
# Null hypothesis probability = 6.910151e-01
Photon flux (15-150 keV) in 1 sec: 3.36173 ( -0.28456 0.27085 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.52591e-07 ( -2.9104e-08 2.7881e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 1.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.946880 ( 0.946777 0.946777 )
beta : -0.713303 ( -0.156124 0.162806 )
Epeak [keV] : 16.7168 ( -16.7173 -16.7173 )
Norm@50keV : 3.95698E-02 ( -0.0130233 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.17 using 59 PHA bins.
# Reduced chi-squared = 0.9122 for 55 degrees of freedom
# Null hypothesis probability = 6.592574e-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] : 31.7364 (-4.1392 5.28158)
R^2/D10^2 : 4.28044E-02 (-0.0146107 0.020693)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 83.83 using 59 PHA bins.
# Reduced chi-squared = 1.471 for 57 degrees of freedom
# Null hypothesis probability = 1.187341e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.511e-09 1.207e-09
25- 50 4.107e-08 6.045e-09
50-150 2.853e-07 3.415e-08
15-150 3.329e-07 3.370e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 13.6236 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 133.77 using 59 PHA bins.
# Reduced chi-squared = 2.3468 for 57 degrees of freedom
# Null hypothesis probability = 4.105333e-08
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.392e-08 1.519e-08
25- 50 6.526e-08 1.370e-08
50-150 1.431e-07 7.106e-08
15-150 2.423e-07 9.080e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.88509 (-2.46255 3.29999)
R1^2/D10^2 : 1.10083 (-0.678699 2.19627)
kT2 [keV] : 57.5740 (-16.3746 61.0435)
R2^2/D10^2 : 8.31821E-03 (-0.00515158 0.0110249)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.37 using 59 PHA bins.
# Reduced chi-squared = 0.8612 for 55 degrees of freedom
# Null hypothesis probability = 7.580804e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.950e-08 9.592e-09
25- 50 5.504e-08 2.038e-08
50-150 2.911e-07 1.358e-07
15-150 3.656e-07 1.505e-07
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: 0.711615 ( -0.162064 0.155385 )
Norm@50keV : 2.83488E-02 ( -0.00252151 0.00246537 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.16 using 59 PHA bins.
# Reduced chi-squared = 0.8099 for 57 degrees of freedom
# Null hypothesis probability = 8.470336e-01
Photon flux (15-150 keV) in 1.052 sec: 3.27394 ( -0.270473 0.271513 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.62136e-07 ( -2.9504e-08 2.96077e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.711563 ( -0.171575 0.149391 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 2.86234E-02 ( -0.00234574 0.0064062 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.26 using 59 PHA bins.
# Reduced chi-squared = 0.8261 for 56 degrees of freedom
# Null hypothesis probability = 8.200948e-01
Photon flux (15-150 keV) in 1.052 sec: 3.28306 ( -0.27667 0.26243 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.6232e-07 ( -2.95864e-08 2.82599e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.946251 ( 0.946265 0.946265 )
beta : -0.711605 ( -0.155466 0.16216 )
Epeak [keV] : 16.6521 ( -16.6517 -16.6517 )
Norm@50keV : 3.86835E-02 ( -0.0127404 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.16 using 59 PHA bins.
# Reduced chi-squared = 0.8394 for 55 degrees of freedom
# Null hypothesis probability = 7.960948e-01
Photon flux (15-150 keV) in 1.052 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) = 5.48e-08
S(50-100 keV) = 1.34e-07
T90 vs. Hardness ratio plot
T90 = 0.919999957084656 sec.
Hardness ratio (energy fluence ratio) = 2.44526
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.92328
Count Ratio (50-100 keV) / (15-25 keV) = 2.41034
Mask shadow pattern
IMX = 3.084284022139763E-01, IMY = 5.218055327131941E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.512000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.512000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.512000
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:
-532.767400 -516.885900
-239.968000 -0.032000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.2151 -60.7552 9.0 49.3 -135.0 -1.5148 -1.3 8.5 Cen X-3
186.6465 -62.7722 0.8 41.3 -135.5 6.5296 13.8 0.3 GX 301-2
244.9865 -15.6450 0.3 28.8 -9.5 9.5239 37.4 0.5 Sco X-1
256.2004 -37.9726 0.0 6.5 33.1 0.4261 1.9 12.7 4U 1700-377
256.4338 -36.4070 1.8 8.0 29.5 1.3760 6.5 1.0 GX 349+2
263.0910 -24.7228 13.8 21.0 33.5 0.2091 0.8 4.7 GX 1+4
264.7248 -44.3004 5.5 8.9 102.9 0.5173 2.1 9.0 4U 1735-44
268.3009 -1.5401 28.6 44.6 28.4 0.2251 0.4 6.6 SW J1753.5-0127
270.3034 -25.0564 3.0 23.8 49.2 1.1185 3.9 1.7 GX 5-1
270.3960 -25.7240 2.6 23.3 50.3 1.2548 4.5 5.2 GRS 1758-258
273.8270 -13.9707 15.8 35.0 43.6 0.3147 0.7 11.1 GX 17+2
276.0790 -30.4707 4.6 23.0 67.9 0.7356 2.5 10.1 H1820-303
284.8325 -24.8842 4.3 32.5 70.5 1.2079 2.7 11.3 HT1900.1-2455
263.0478 -33.8921 5.8 12.9 48.9 0.4844 2.0 4.5 GX 354-0
349.7626 -83.4864 3.3 47.4 176.6 1.8975 3.5 ------ UNKNOWN
247.6809 8.2239 2.8 52.2 -0.5 2.7189 4.1 ------ UNKNOWN
107.9753 -76.5472 3.4 57.6 -165.4 4.6410 3.4 ------ UNKNOWN
102.9138 -75.5855 4.0 59.0 -166.2 5.9660 2.9 ------ UNKNOWN
161.3583 -75.2752 2.7 48.2 -154.7 2.2935 4.3 ------ UNKNOWN
209.3836 -18.8978 3.4 43.6 -63.8 4.8715 3.4 ------ UNKNOWN
196.6573 -39.3894 5.3 41.1 -98.4 3.1155 2.2 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-0.032000 1.020000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.2637 -60.8025 12.0 49.3 -135.0 -0.0677 -1.0 10.9 Cen X-3
186.6800 -62.7414 145.2 41.3 -135.4 -0.0023 -0.1 1.8 GX 301-2
244.8798 -15.5639 20.0 28.9 -9.7 0.0095 0.6 7.4 Sco X-1
255.9235 -38.0017 3.9 6.4 31.5 0.0395 2.9 9.9 4U 1700-377
256.6103 -36.3570 5.3 8.1 30.4 0.0285 2.2 9.3 GX 349+2
262.8547 -24.6202 6.5 21.0 32.9 0.0297 1.8 11.3 GX 1+4
264.9573 -44.4446 5.8 9.1 103.9 0.0285 2.0 9.2 4U 1735-44
268.3286 -1.4112 7.1 44.7 28.4 0.0568 1.6 3.4 SW J1753.5-0127
270.1214 -25.0938 4.4 23.6 48.9 -0.0465 -2.6 8.9 GX 5-1
270.1368 -25.7533 50.3 23.1 49.8 -0.0041 -0.2 9.0 GRS 1758-258
273.9839 -14.1804 6.7 34.9 44.0 0.0415 1.7 8.7 GX 17+2
275.7343 -30.3060 23.0 22.9 67.1 0.0093 0.5 10.5 H1820-303
284.8496 -24.9144 7.1 32.5 70.5 0.0423 1.6 10.2 HT1900.1-2455
262.8530 -34.0080 0.0 12.7 48.6 -0.0176 -1.2 12.4 GX 354-0
100.5768 -78.3103 2.5 56.7 -168.1 0.2836 4.5 ------ UNKNOWN
221.0334 -25.6133 0.6 31.2 -59.4 0.4805 20.9 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
70.332580 962.062200
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.3222 -60.6243 19.9 48.9 -170.9 1.0252 0.6 0.2 Cen X-3
186.6809 -62.7695 0.8 43.5 -179.1 18.5644 15.1 0.7 GX 301-2
244.9800 -15.6412 0.3 24.5 49.4 32.1138 35.8 0.1 Sco X-1
256.1861 -37.7174 0.0 32.0 99.7 -3.8645 -2.5 12.1 4U 1700-377
256.3719 -36.3709 7.5 31.9 97.1 2.4089 1.5 4.4 GX 349+2
262.8456 -24.8513 0.0 37.6 77.0 1.5317 0.6 10.9 GX 1+4
264.9026 -44.3085 4.5 39.9 108.2 -7.3136 -2.6 10.9 4U 1735-44
263.0781 -33.9215 5.1 37.1 91.9 -5.1869 -2.2 6.8 GX 354-0
258.0014 -3.6208 2.9 41.7 43.2 7.6463 4.0 ------ UNKNOWN
228.2692 -51.0280 2.8 26.0 148.5 3.2226 4.1 ------ UNKNOWN
233.7671 28.1482 2.9 55.2 -7.4 9.5243 3.9 ------ UNKNOWN
220.3841 11.3063 3.0 37.0 -22.2 3.6468 3.9 ------ UNKNOWN
155.7368 -41.4104 4.9 55.3 -145.2 13.0297 2.4 ------ UNKNOWN
201.6964 21.3655 4.4 50.6 -44.6 11.3844 2.6 ------ UNKNOWN
166.5321 -29.7877 3.0 48.0 -129.1 14.5868 3.9 ------ UNKNOWN
170.6257 -24.6911 3.9 45.4 -121.3 11.1317 2.9 ------ UNKNOWN
196.8351 14.9093 3.5 46.9 -54.0 13.5341 3.3 ------ UNKNOWN
Plot creation:
Wed Sep 30 11:06:46 EDT 2015