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
272.4971 61.3615 0.0074 51.7573 1.1621 3.1805032 26.026 TRIG_00661775
Foreground time interval of the image:
-0.740 9.613 (delta_t = 10.353 [sec])
Background time interval of the image:
-49.187 -0.740 (delta_t = 48.447 [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
Multiple GTIs in the spectrum
tstart tstop
-0.740000 38.175800
39.512000 164.704000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.54232 ( -0.055888 0.0559775 )
Norm@50keV : 4.71213E-03 ( -0.000136436 0.000136414 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.94 using 59 PHA bins.
# Reduced chi-squared = 0.8060 for 57 degrees of freedom
# Null hypothesis probability = 8.526935e-01
Photon flux (15-150 keV) in 164.1 sec: 0.595210 ( -0.0191873 0.0192839 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.28765e-06 ( -2.22132e-07 2.22618e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-0.740000 38.175800
39.512000 164.704000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.54972 ( -0.0626918 0.0579487 )
Epeak [keV] : 9999.35 ( -9999.36 -9999.36 )
Norm@50keV : 4.67583E-03 ( -0.000134581 0.000785756 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.37 using 59 PHA bins.
# Reduced chi-squared = 0.8281 for 56 degrees of freedom
# Null hypothesis probability = 8.168973e-01
Photon flux (15-150 keV) in 164.1 sec: 0.595516 ( -0.019683 0.018667 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.2873e-06 ( -2.40439e-07 1.2017e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-0.740000 38.175800
39.512000 164.704000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.08867 ( 1.0889 1.0889 )
beta : -1.56606 ( -0.0792356 0.0726109 )
Epeak [keV] : 65.5836 ( -65.5291 -65.5291 )
Norm@50keV : 9.15158E-03 ( -0.00436696 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.34 using 59 PHA bins.
# Reduced chi-squared = 0.8243 for 55 degrees of freedom
# Null hypothesis probability = 8.204533e-01
Photon flux (15-150 keV) in 164.1 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] : 16.2803 ( )
R^2/D10^2 : 4.75927E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 365.37 using 59 PHA bins.
# Reduced chi-squared = 6.4100 for 57 degrees of freedom
# Null hypothesis probability = 1.476032e-46
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.263e-07 2.691e-08
25- 50 1.821e-06 7.302e-08
50-150 3.395e-06 1.772e-07
15-150 5.641e-06 1.756e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-13.7733 -200)
Norm : 2.41450 (-0.0699118 0.0699118)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.62 using 59 PHA bins.
# Reduced chi-squared = 0.9933 for 57 degrees of freedom
# Null hypothesis probability = 4.893877e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.869e-07 3.413e-08
25- 50 1.898e-06 6.072e-08
50-150 4.164e-06 1.337e-07
15-150 7.049e-06 2.289e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.69336 (-0.670312 0.708469)
R1^2/D10^2 : 0.475275 (-0.124213 0.18089)
kT2 [keV] : 32.0688 (-3.4982 4.73433)
R2^2/D10^2 : 3.68934E-03 (-0.00132941 0.00178632)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.78 using 59 PHA bins.
# Reduced chi-squared = 0.8505 for 55 degrees of freedom
# Null hypothesis probability = 7.770878e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.030e-07 7.787e-08
25- 50 1.914e-06 1.026e-07
50-150 4.479e-06 4.472e-07
15-150 7.297e-06 5.235e-07
Peak spectrum fit
Power-law model
Time interval is from 0.204 sec. to 1.204 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.23969 ( -0.135699 0.134268 )
Norm@50keV : 5.79965E-02 ( -0.0045266 0.00451536 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.73 using 59 PHA bins.
# Reduced chi-squared = 0.8725 for 57 degrees of freedom
# Null hypothesis probability = 7.418092e-01
Photon flux (15-150 keV) in 1 sec: 6.84810 ( -0.569271 0.571714 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.82013e-07 ( -4.74742e-08 4.75737e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.204 sec. to 1.204 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.23531 ( -0.52017 0.135113 )
Epeak [keV] : 9988.50 ( -9989.84 -9989.84 )
Norm@50keV : 5.82618E-02 ( -0.00449955 0.0389517 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.73 using 59 PHA bins.
# Reduced chi-squared = 0.8880 for 56 degrees of freedom
# Null hypothesis probability = 7.096672e-01
Photon flux (15-150 keV) in 1 sec: 6.84634 ( -0.58264 0.56919 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.82227e-07 ( -4.5315e-08 4.5049e-08 ) ergs/cm2
Band function
Time interval is from 0.204 sec. to 1.204 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.82722 ( -4.82722 -4.82722 )
beta : -1.26881 ( -0.145785 0.143269 )
Epeak [keV] : 24.3185 ( -24.3185 6.00146 )
Norm@50keV : 4204.65 ( -324.874 1.70058e+07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.40 using 59 PHA bins.
# Reduced chi-squared = 0.8982 for 55 degrees of freedom
# Null hypothesis probability = 6.876303e-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] : 21.0270 (-2.14378 2.4552)
R^2/D10^2 : 0.264411 (-0.0810064 0.114003)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 92.97 using 59 PHA bins.
# Reduced chi-squared = 1.631 for 57 degrees of freedom
# Null hypothesis probability = 1.847791e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.207e-08 3.600e-09
25- 50 1.136e-07 1.379e-08
50-150 3.743e-07 4.615e-08
15-150 5.099e-07 4.700e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-16.8895 -200)
Norm : 29.0282 (-2.29049 2.29049)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.83 using 59 PHA bins.
# Reduced chi-squared = 1.190 for 57 degrees of freedom
# Null hypothesis probability = 1.543909e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.231e-08 7.315e-09
25- 50 1.391e-07 1.615e-08
50-150 3.051e-07 1.012e-07
15-150 5.165e-07 1.101e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.39524 (-1.68222 2.06548)
R1^2/D10^2 : 5.24948 (-2.9427 8.09394)
kT2 [keV] : 33.1832 (-6.12212 11.4797)
R2^2/D10^2 : 5.09130E-02 (-0.0306931 0.0501094)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.29 using 59 PHA bins.
# Reduced chi-squared = 0.8781 for 55 degrees of freedom
# Null hypothesis probability = 7.267934e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.688e-08 2.688e-08
25- 50 1.267e-07 4.009e-08
50-150 4.068e-07 1.122e-07
15-150 5.904e-07 1.566e-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: 1.52954 ( -0.0975761 0.0976948 )
Norm@50keV : 1.94983E-02 ( -0.00112721 0.00112698 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.82 using 59 PHA bins.
# Reduced chi-squared = 1.085 for 57 degrees of freedom
# Null hypothesis probability = 3.081037e-01
Photon flux (15-150 keV) in 10.35 sec: 2.45401 ( -0.153317 0.153793 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.90556e-06 ( -1.15081e-07 1.15257e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.09536 ( -0.413752 0.379821 )
Epeak [keV] : 113.375 ( -31.3485 324.769 )
Norm@50keV : 3.12695E-02 ( -0.0103593 0.0170878 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.96 using 59 PHA bins.
# Reduced chi-squared = 1.035 for 56 degrees of freedom
# Null hypothesis probability = 4.028318e-01
Photon flux (15-150 keV) in 10.35 sec: 2.40461 ( -0.15861 0.15914 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.87336e-06 ( -1.20236e-07 1.1976e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.09527 ( -0.202831 0.364731 )
beta : -10.00000 ( 10 20 )
Epeak [keV] : 113.347 ( -22.9317 324.027 )
Norm@50keV : 3.12691E-02 ( -0.00622954 0.00647093 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.96 using 59 PHA bins.
# Reduced chi-squared = 1.054 for 55 degrees of freedom
# Null hypothesis probability = 3.666551e-01
Photon flux (15-150 keV) in 10.35 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) = 1.84e-06
S(50-100 keV) = 2.53e-06
T90 vs. Hardness ratio plot
T90 = 129.579999983311 sec.
Hardness ratio (energy fluence ratio) = 1.375
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.34024
Count Ratio (50-100 keV) / (15-25 keV) = 1.02986
Mask shadow pattern
IMX = 1.268564196859785E+00, IMY = -2.573418711652416E-02
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:
-49.187400 -0.740000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.3415 35.4479 3.7 39.6 -35.2 -0.3641 -3.1 8.5 Her X-1
262.9962 -24.6885 5.0 43.7 -134.1 0.4081 2.3 3.5 GX 1+4
268.2548 -1.3884 5.8 23.9 -109.0 0.1625 2.0 7.8 SW J1753.5-0127
270.2744 -25.0837 17.7 40.3 -142.6 -0.0812 -0.7 0.6 GX 5-1
270.4943 -25.8776 0.0 40.9 -143.5 -0.0049 -0.0 13.1 GRS 1758-258
273.9912 -14.0208 4.3 29.0 -138.3 0.2302 2.7 1.3 GX 17+2
275.9317 -30.3696 31.4 43.2 -152.7 0.0478 0.4 0.4 H1820-303
285.1789 -24.9275 4.2 36.1 -163.4 -0.2450 -2.7 7.8 HT1900.1-2455
288.7921 10.9315 2.4 0.1 -177.7 0.3338 4.9 0.9 GRS 1915+105
299.5719 35.2082 1.2 26.1 31.3 0.7731 9.6 1.0 Cyg X-1
308.1380 40.9786 3.6 34.5 37.2 0.3557 3.2 2.0 Cyg X-3
326.3307 38.1917 8.2 43.1 55.5 -0.3674 -1.4 10.8 Cyg X-2
263.1099 -33.7940 4.4 51.0 -141.4 0.7461 2.7 6.5 GX 354-0
301.9395 -4.8673 2.5 20.6 150.8 0.3452 4.7 ------ UNKNOWN
300.0694 -9.8181 2.8 23.6 162.3 0.3003 4.1 ------ UNKNOWN
245.1298 39.0879 2.4 47.8 -35.3 0.8841 4.9 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-0.740000 9.612600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.2684 35.4106 5.0 39.7 -35.3 0.1435 2.3 10.1 Her X-1
263.0466 -24.6320 6.5 43.6 -134.1 -0.1518 -1.8 7.1 GX 1+4
268.5484 -1.5587 0.0 23.7 -109.7 -0.0366 -0.8 12.6 SW J1753.5-0127
270.2119 -25.1149 4.9 40.4 -142.6 0.1496 2.3 4.5 GX 5-1
270.3658 -25.6038 5.6 40.8 -143.1 -0.1316 -2.1 9.0 GRS 1758-258
273.9917 -13.9087 6.5 28.9 -138.1 -0.0791 -1.8 7.7 GX 17+2
276.0017 -30.4482 5.8 43.2 -152.8 -0.1331 -2.0 6.3 H1820-303
285.1775 -24.9228 3.5 36.1 -163.4 0.1626 3.3 7.7 HT1900.1-2455
288.6643 10.8368 21.7 0.2 -133.1 0.0196 0.5 10.2 GRS 1915+105
299.6601 35.3518 5.7 26.3 31.4 0.0925 2.0 9.6 Cyg X-1
307.9554 40.8174 0.0 34.3 37.2 0.1019 1.7 10.7 Cyg X-3
326.0270 38.4788 10.1 43.1 54.9 0.1958 1.1 11.6 Cyg X-2
262.9094 -33.8041 1558.7 51.1 -141.2 -0.0011 -0.0 4.4 GX 354-0
326.3328 1.9703 2.6 38.3 111.9 0.4982 4.3 ------ UNKNOWN
318.2551 -8.4058 2.3 35.2 133.3 0.3382 5.1 ------ UNKNOWN
302.8753 -16.2016 2.2 30.6 163.6 0.2340 5.2 ------ UNKNOWN
272.4971 61.3615 0.4 51.8 1.2 3.1805 26.1 ------ UNKNOWN
292.5585 -19.9288 1.7 31.1 -175.9 0.2788 6.7 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
76.212600 962.585000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.1993 35.3347 0.0 28.5 -116.4 0.0893 0.1 12.7 Her X-1
288.8119 10.9613 3.9 51.8 -169.3 4.5080 3.0 1.2 GRS 1915+105
299.6011 35.2022 0.6 31.3 165.4 14.4894 19.7 0.5 Cyg X-1
308.0916 40.9335 1.1 29.6 148.4 7.1429 10.4 1.4 Cyg X-3
326.0018 38.2877 214.3 39.9 131.4 0.0749 0.1 8.3 Cyg X-2
272.5023 61.3606 0.7 0.0 153.9 8.6708 16.3 ------ UNKNOWN
192.6322 40.2710 5.3 50.8 -44.4 6.9970 2.2 ------ UNKNOWN
203.0466 39.0136 4.2 46.9 -53.9 7.9663 2.7 ------ UNKNOWN
212.7996 37.0801 4.9 43.7 -64.1 6.6347 2.4 ------ UNKNOWN
257.5032 14.6083 3.7 48.0 -129.1 8.2606 3.2 ------ UNKNOWN
Plot creation:
Mon Nov 16 15:44:20 EST 2015