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
278.921 -11.997 0.000 38.085 -33.956 0.693 6.794 TRIG_00578227
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 -71.096 sec. to 64.264 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.87316 ( -0.429281 0.520459 )
Norm@50keV : 3.95458E-04 ( -0.000151789 0.00016163 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.29 using 59 PHA bins.
# Reduced chi-squared = 1.216 for 57 degrees of freedom
# Null hypothesis probability = 1.273736e-01
Photon flux (15-150 keV) in 135.4 sec: 9.93289E-02 ( -0.0190967 0.0191269 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.08607e-07 ( -1.45551e-07 1.57327e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -71.096 sec. to 64.264 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.771410 ( )
Epeak [keV] : 17.1559 ( )
Norm@50keV : 1.19179E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.93 using 59 PHA bins.
# Reduced chi-squared = 1.195 for 56 degrees of freedom
# Null hypothesis probability = 1.505403e-01
Photon flux (15-150 keV) in 135.4 sec: 9.63839E-02 ( -0.0093144 0.0187151 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.25793e-07 ( -1.14756e-07 1.52688e-07 ) ergs/cm2
Band function
Time interval is from -71.096 sec. to 64.264 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.304770 ( 1.72899 1.72899 )
beta : -10.0000 ( 9.99981 19.9977 )
Epeak [keV] : 20.9230 ( -4.62946 7.78411 )
Norm@50keV : 6.97023E-02 ( -0.0130626 38.2902 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.85 using 59 PHA bins.
# Reduced chi-squared = 1.215 for 55 degrees of freedom
# Null hypothesis probability = 1.313101e-01
Photon flux (15-150 keV) in 135.4 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] : 5.92517 (-1.0595 1.21324)
R^2/D10^2 : 0.394683 (-0.220991 0.55829)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.42 using 59 PHA bins.
# Reduced chi-squared = 1.183 for 57 degrees of freedom
# Null hypothesis probability = 1.626892e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.448e-07 9.216e-08
25- 50 2.375e-07 9.928e-08
50-150 2.065e-08 1.490e-08
15-150 5.029e-07 2.021e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 20.0633 (-6.60324 10.7461)
Norm : 1.21181 (-0.459544 0.840834)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.22 using 59 PHA bins.
# Reduced chi-squared = 1.179 for 57 degrees of freedom
# Null hypothesis probability = 1.668378e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.552e-07 7.298e-08
25- 50 2.240e-07 7.869e-08
50-150 6.745e-08 4.710e-08
15-150 5.466e-07 1.979e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.34493 (-2.32736 24.8024)
R1^2/D10^2 : 12.0812 (-13.0532 -13.0532)
kT2 [keV] : 6.63696 (-1.55335 -6.62118)
R2^2/D10^2 : 0.212783 (-0.217283 0.573245)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.44 using 59 PHA bins.
# Reduced chi-squared = 1.208 for 55 degrees of freedom
# Null hypothesis probability = 1.388182e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.479e-07 1.284e-07
25- 50 2.401e-07 1.431e-07
50-150 3.226e-08 2.239e-08
15-150 5.202e-07 2.816e-07
Peak spectrum fit
Power-law model
Time interval is from 49.396 sec. to 50.396 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.62682 ( -0.705801 0.703711 )
Norm@50keV : 4.17882E-03 ( -0.00169881 0.00164149 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.65 using 59 PHA bins.
# Reduced chi-squared = 0.6956 for 57 degrees of freedom
# Null hypothesis probability = 9.610825e-01
Photon flux (15-150 keV) in 1 sec: 0.541554 ( -0.211621 0.213241 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.89598e-08 ( -1.60744e-08 1.66334e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 49.396 sec. to 50.396 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.63283 ( -1.40052 0.732258 )
Epeak [keV] : 9999.36 ( -9999.35 -9999.36 )
Norm@50keV : 4.17384E-03 ( -0.00418143 -0.00418143 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.65 using 59 PHA bins.
# Reduced chi-squared = 0.7080 for 56 degrees of freedom
# Null hypothesis probability = 9.518625e-01
Photon flux (15-150 keV) in 1 sec: 0.541404 ( -0.210557 0.212753 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.89733e-08 ( -2.46206e-08 1.64983e-08 ) ergs/cm2
Band function
Time interval is from 49.396 sec. to 50.396 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.98772 ( -4.98772 -4.98772 )
beta : -2.10494 ( -4.16495 0.967178 )
Epeak [keV] : 29.1867 ( -29.1867 55.7433 )
Norm@50keV : 215.084 ( -78.9167 4.61439e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.28 using 59 PHA bins.
# Reduced chi-squared = 0.6961 for 55 degrees of freedom
# Null hypothesis probability = 9.578689e-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] : 9.50971 (-3.179 8.04777)
R^2/D10^2 : 0.315283 (-0.315023 1.22273)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.07 using 59 PHA bins.
# Reduced chi-squared = 0.7206 for 57 degrees of freedom
# Null hypothesis probability = 9.446212e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.697e-09 3.807e-09
25- 50 1.317e-08 8.675e-09
50-150 5.931e-09 4.404e-09
15-150 2.480e-08 1.627e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 156.329 (-120.581 -156.238)
Norm : 2.23241 (-0.881382 1.80843)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.73 using 59 PHA bins.
# Reduced chi-squared = 0.6971 for 57 degrees of freedom
# Null hypothesis probability = 9.602011e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.480e-09 3.506e-09
25- 50 1.046e-08 6.575e-09
50-150 2.247e-08 1.383e-08
15-150 3.842e-08 2.395e-08
Double BB
R1^2/D10^2 : 0.536271 (-0.486568 2.50121)
kT2 [keV] : 200.000 (-200 -200)
R2^2/D10^2 : 7.09054E-05 (-5.70943e-05 0.000646025)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.38 using 59 PHA bins.
#Fit statistic : Chi-Squared = 37.36 using 59 PHA bins.
#Fit statistic : Chi-Squared = 37.32 using 59 PHA bins.
# Reduced chi-squared = 0.6797 for 55 degrees of freedom
# Reduced chi-squared = 0.6793 for 55 degrees of freedom
# Reduced chi-squared = 0.6785 for 55 degrees of freedom
# Null hypothesis probability = 9.668761e-01
# Null hypothesis probability = 9.670734e-01
# Null hypothesis probability = 9.674703e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.543e-09 4.088e-09
25- 50 1.192e-08 7.700e-09
50-150 2.274e-08 1.320e-08
15-150 4.121e-08 2.014e-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: 2.87316 ( -0.429281 0.520459 )
Norm@50keV : 3.95458E-04 ( -0.000151789 0.00016163 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.29 using 59 PHA bins.
# Reduced chi-squared = 1.216 for 57 degrees of freedom
# Null hypothesis probability = 1.273736e-01
Photon flux (15-150 keV) in 135.4 sec: 9.93289E-02 ( -0.0190967 0.0191269 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.08607e-07 ( -1.45551e-07 1.57327e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.771410 ( )
Epeak [keV] : 17.1559 ( )
Norm@50keV : 1.19179E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.93 using 59 PHA bins.
# Reduced chi-squared = 1.195 for 56 degrees of freedom
# Null hypothesis probability = 1.505403e-01
Photon flux (15-150 keV) in 135.4 sec: 9.63839E-02 ( -0.0093144 0.0187151 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.25793e-07 ( -1.14756e-07 1.52688e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.304770 ( 1.72899 1.72899 )
beta : -10.0000 ( 9.99981 19.9977 )
Epeak [keV] : 20.9230 ( -4.62946 7.78411 )
Norm@50keV : 6.97023E-02 ( -0.0130626 38.2902 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.85 using 59 PHA bins.
# Reduced chi-squared = 1.215 for 55 degrees of freedom
# Null hypothesis probability = 1.313101e-01
Photon flux (15-150 keV) in 135.4 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) = 2.04e-07
S(50-100 keV) = 1.12e-07
T90 vs. Hardness ratio plot
T90 = 130.431999981403 sec.
Hardness ratio (energy fluence ratio) = 0.54902
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.706564
Count Ratio (50-100 keV) / (15-25 keV) = 0.0861737
Mask shadow pattern
IMX = 0.650030747167, IMY = 0.437727146852
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:
-466.799400 -444.850000
-239.000000 -71.096000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
255.9963 -37.7498 57.9 34.8 -90.6 0.0705 0.2 5.7 4U 1700-377
256.3772 -36.5025 5.8 35.1 -88.5 0.7271 2.0 5.5 GX 349+2
263.0181 -24.6199 5.0 37.3 -66.3 0.7654 2.3 7.6 GX 1+4
264.8677 -44.6346 0.0 26.2 -99.0 0.3323 1.5 12.3 4U 1735-44
268.3373 -1.5834 4.3 52.2 -40.0 -2.1072 -2.7 8.1 SW J1753.5-0127
270.4893 -24.9757 0.0 32.1 -58.5 -0.3048 -1.3 12.8 GX 5-1
270.2967 -25.7671 5.7 31.7 -59.8 0.4692 2.0 1.5 GRS 1758-258
274.0758 -14.0652 3.2 38.6 -42.2 0.9483 3.6 4.4 GX 17+2
275.9392 -30.5105 8.2 24.8 -59.9 0.2776 1.4 8.6 H1820-303
285.0403 -25.0665 174.9 23.8 -36.3 -0.0113 -0.1 8.8 HT1900.1-2455
288.8419 10.9101 4.6 56.7 -11.0 1.7445 2.5 3.3 GRS 1915+105
262.7898 -33.9130 6.1 31.8 -79.7 0.5181 1.9 11.0 GX 354-0
355.0044 -37.1182 2.7 40.1 102.8 3.4425 4.2 ------ UNKNOWN
302.2495 0.6924 2.3 45.2 4.8 1.5590 5.0 ------ UNKNOWN
296.3931 0.9420 2.5 45.8 -3.4 1.4905 4.5 ------ UNKNOWN
122.4424 -82.0720 2.7 53.4 -175.5 2.0882 4.3 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-71.096000 64.264000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
255.9969 -37.8435 975.4 34.8 -90.8 -0.0038 -0.0 0.5 4U 1700-377
256.3351 -36.5203 391.8 35.1 -88.5 0.0098 0.0 7.6 GX 349+2
262.9056 -24.5947 0.0 37.4 -66.4 -0.6858 -2.1 10.7 GX 1+4
264.8677 -44.3889 3.5 26.3 -98.4 0.6821 3.3 6.5 4U 1735-44
268.3004 -1.5371 3.6 52.3 -40.0 2.4759 3.2 6.5 SW J1753.5-0127
270.3805 -24.9720 12.6 32.2 -58.7 0.2187 0.9 8.3 GX 5-1
270.2614 -25.8721 8.7 31.6 -60.0 0.3027 1.3 8.1 GRS 1758-258
273.8945 -14.0714 5.8 38.7 -42.5 0.5300 2.0 6.8 GX 17+2
275.8462 -30.3856 4.4 24.9 -59.8 0.5148 2.6 4.2 H1820-303
285.0096 -24.7735 13.3 24.1 -36.0 0.1423 0.9 8.9 HT1900.1-2455
288.8432 10.9855 39.3 56.8 -11.0 -0.2037 -0.3 3.6 GRS 1915+105
262.8993 -33.8403 5.4 31.8 -79.5 -0.5558 -2.2 4.5 GX 354-0
35.2890 -71.4105 2.0 49.3 159.6 2.9453 5.8 ------ UNKNOWN
95.0289 -82.8657 2.2 51.9 -179.6 2.2327 5.3 ------ UNKNOWN
278.9352 -12.0203 1.9 38.1 -34.0 1.4459 6.1 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
-547.000000 -444.850000
-239.000000 357.760400
361.000000 963.085300
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
255.9252 -37.8221 4.9 34.8 -90.8 3.5493 2.4 3.2 4U 1700-377
256.4009 -36.4932 4.5 35.1 -88.4 4.1494 2.6 4.5 GX 349+2
262.9976 -24.6147 5.8 37.3 -66.4 3.1613 2.0 7.9 GX 1+4
264.8404 -44.5898 4.3 26.2 -98.9 2.4142 2.7 9.4 4U 1735-44
268.2564 -1.5023 6.2 52.4 -40.1 5.5210 1.9 7.3 SW J1753.5-0127
270.2672 -25.0943 123.8 32.2 -59.0 0.0842 0.1 1.3 GX 5-1
270.3025 -25.7434 4.9 31.7 -59.8 2.0560 2.4 0.0 GRS 1758-258
274.0018 -14.0248 2.0 38.7 -42.3 6.3553 5.7 0.7 GX 17+2
275.9366 -30.2857 11.8 25.0 -59.5 0.7785 1.0 4.9 H1820-303
285.2019 -24.8664 41.1 23.9 -35.8 -0.2073 -0.3 9.6 HT1900.1-2455
288.8093 10.9236 3.5 56.8 -11.1 10.0637 3.3 1.5 GRS 1915+105
262.7597 -33.9043 0.0 31.8 -79.7 1.9674 1.7 12.2 GX 354-0
355.0178 -37.0981 4.0 40.1 102.8 11.6530 2.9 ------ UNKNOWN
300.7360 12.1937 4.9 56.8 3.0 10.0266 2.4 ------ UNKNOWN
277.3852 -23.8389 1.8 28.8 -47.7 5.2505 6.5 ------ UNKNOWN
Plot creation:
Tue Nov 24 22:46:59 EST 2015