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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
288.9628 4.1963 0.0051 10.2673 -91.7735 4.5916489 37.231 TRIG_00641698
Foreground time interval of the image:
-43.739 10.261 (delta_t = 54.000 [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 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 -111.856 sec. to 12.176 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.70732 ( -0.09593 0.0970521 )
Norm@50keV : 2.80113E-03 ( -0.000153958 0.000152876 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.42 using 59 PHA bins.
# Reduced chi-squared = 0.9547 for 57 degrees of freedom
# Null hypothesis probability = 5.726275e-01
Photon flux (15-150 keV) in 124 sec: 0.372976 ( -0.0190529 0.0190771 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.21417e-06 ( -1.86027e-07 1.8775e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -111.856 sec. to 12.176 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.40772 ( -0.410011 0.339918 )
Epeak [keV] : 91.2379 ( -29.3724 -91.2384 )
Norm@50keV : 4.04218E-03 ( -0.00132305 0.00258169 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.55 using 59 PHA bins.
# Reduced chi-squared = 0.9384 for 56 degrees of freedom
# Null hypothesis probability = 6.062838e-01
Photon flux (15-150 keV) in 124 sec: 0.366018 ( -0.020841 0.020831 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.1079e-06 ( -2.27776e-07 2.28668e-07 ) ergs/cm2
Band function
Time interval is from -111.856 sec. to 12.176 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -6.42316E-03 ( -1.52205 3.55392 )
beta : -1.84518 ( 1.84509 0.152827 )
Epeak [keV] : 36.5556 ( -12.0066 53.462 )
Norm@50keV : 3.70822E-02 ( -0.0346162 27.6663 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.31 using 59 PHA bins.
# Reduced chi-squared = 0.9148 for 55 degrees of freedom
# Null hypothesis probability = 6.540462e-01
Photon flux (15-150 keV) in 124 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.11662e-06 ( -3.11575e-06 -2.03546e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 12.2103 ( )
R^2/D10^2 : 8.18159E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 129.21 using 59 PHA bins.
# Reduced chi-squared = 2.2668 for 57 degrees of freedom
# Null hypothesis probability = 1.581985e-07
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.203e-07 3.137e-08
25- 50 1.029e-06 6.039e-08
50-150 9.328e-07 1.167e-07
15-150 2.282e-06 1.364e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 129.917 (-29.1084 37.7653)
Norm : 1.54542 (-0.0960772 0.115355)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.79 using 59 PHA bins.
# Reduced chi-squared = 0.9262 for 57 degrees of freedom
# Null hypothesis probability = 6.335085e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.972e-07 3.980e-08
25- 50 9.015e-07 7.136e-08
50-150 1.671e-06 4.955e-07
15-150 3.070e-06 5.499e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.32234 (-1.07192 1.10149)
R1^2/D10^2 : 0.381107 (-0.139033 0.263259)
kT2 [keV] : 27.0664 (-5.53346 9.7144)
R2^2/D10^2 : 3.35032E-03 (-0.00214411 0.00446537)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.01 using 59 PHA bins.
# Reduced chi-squared = 0.9275 for 55 degrees of freedom
# Null hypothesis probability = 6.277358e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.761e-07 7.229e-08
25- 50 9.333e-07 1.264e-07
50-150 1.720e-06 6.044e-07
15-150 3.129e-06 7.490e-07
Peak spectrum fit
Power-law model
Time interval is from -13.868 sec. to -12.868 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.48132 ( -0.119248 0.120625 )
Norm@50keV : 2.22709E-02 ( -0.00168059 0.00167315 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.26 using 59 PHA bins.
# Reduced chi-squared = 1.268 for 57 degrees of freedom
# Null hypothesis probability = 8.385973e-02
Photon flux (15-150 keV) in 1 sec: 2.76655 ( -0.201598 0.201699 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.11938e-07 ( -1.75978e-08 1.77504e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -13.868 sec. to -12.868 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.388872 ( -0.642575 0.550828 )
Epeak [keV] : 70.4717 ( -11.5908 25.8138 )
Norm@50keV : 8.28881E-02 ( -0.0396161 0.0960289 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.22 using 59 PHA bins.
# Reduced chi-squared = 1.058 for 56 degrees of freedom
# Null hypothesis probability = 3.588502e-01
Photon flux (15-150 keV) in 1 sec: 2.65361 ( -0.20901 0.20899 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.94061e-07 ( -1.9527e-08 1.9827e-08 ) ergs/cm2
Band function
Time interval is from -13.868 sec. to -12.868 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.388773 ( -0.360648 0.951571 )
beta : -10.0000 ( 10 20 )
Epeak [keV] : 70.4574 ( -11.5857 25.8067 )
Norm@50keV : 8.29019E-02 ( -0.03964 0.0961226 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.22 using 59 PHA bins.
# Reduced chi-squared = 1.077 for 55 degrees of freedom
# Null hypothesis probability = 3.242413e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.97222e-07 ( -1.97215e-07 -9.764e-09 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.9792 (-1.13038 1.26397)
R^2/D10^2 : 0.416379 (-0.109974 0.144813)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 76.99 using 59 PHA bins.
# Reduced chi-squared = 1.351 for 57 degrees of freedom
# Null hypothesis probability = 4.002520e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.719e-08 2.190e-09
25- 50 6.384e-08 5.850e-09
50-150 8.208e-08 1.236e-08
15-150 1.631e-07 1.340e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 11.3865 (-0.817763 0.817748)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.55 using 59 PHA bins.
# Reduced chi-squared = 1.167 for 57 degrees of freedom
# Null hypothesis probability = 1.813481e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.836e-08 2.370e-09
25- 50 5.455e-08 7.010e-09
50-150 1.196e-07 3.550e-08
15-150 2.025e-07 4.165e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.28608 (-2.15939 1.99357)
R1^2/D10^2 : 1.13810 (-0.463933 1.10802)
kT2 [keV] : 27.2099 (-7.47917 18.5465)
R2^2/D10^2 : 2.47512E-02 (-0.0207321 0.0464133)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.84 using 59 PHA bins.
# Reduced chi-squared = 1.033 for 55 degrees of freedom
# Null hypothesis probability = 4.064474e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.244e-08 7.508e-09
25- 50 6.124e-08 2.377e-08
50-150 1.151e-07 5.477e-08
15-150 1.988e-07 8.260e-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: 1.79336 ( -0.0721314 0.0727758 )
Norm@50keV : 5.21693E-03 ( -0.000209007 0.000208013 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.69 using 59 PHA bins.
# Reduced chi-squared = 1.170 for 57 degrees of freedom
# Null hypothesis probability = 1.780980e-01
Photon flux (15-150 keV) in 54 sec: 0.717054 ( -0.0277417 0.0277805 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.59411e-06 ( -1.06393e-07 1.06991e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.33840 ( -0.324112 0.300368 )
Epeak [keV] : 67.7474 ( -11.6881 41.2094 )
Norm@50keV : 9.02489E-03 ( -0.00268554 0.004236 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.77 using 59 PHA bins.
# Reduced chi-squared = 1.067 for 56 degrees of freedom
# Null hypothesis probability = 3.403797e-01
Photon flux (15-150 keV) in 54 sec: 0.694401 ( -0.031123 0.031179 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.47097e-06 ( -1.31711e-07 1.32592e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.106087 ( -1.57187 3.03038 )
beta : -1.95326 ( 1.94739 0.124845 )
Epeak [keV] : 37.0336 ( -9.04904 41.9634 )
Norm@50keV : 6.18388E-02 ( -0.061025 16.9297 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.20 using 59 PHA bins.
# Reduced chi-squared = 1.040 for 55 degrees of freedom
# Null hypothesis probability = 3.933908e-01
Photon flux (15-150 keV) in 54 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.49712e-06 ( -2.49674e-06 -1.26463e-07 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 8.73e-07
S(50-100 keV) = 1.07e-06
T90 vs. Hardness ratio plot
T90 = 108.800000011921 sec.
Hardness ratio (energy fluence ratio) = 1.22566
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.34121
Count Ratio (50-100 keV) / (15-25 keV) = 0.771919
Mask shadow pattern
IMX = -5.606019335997852E-03, IMY = 1.810553663361952E-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:
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-43.739400 10.260600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9747 -15.6343 0.8 38.2 110.9 6.8867 14.9 0.4 Sco X-1
254.6596 35.3020 11.1 45.9 -168.4 -0.2408 -1.0 10.2 Her X-1
256.5702 -36.4966 6.9 40.7 74.1 0.9313 1.7 7.9 GX 349+2
263.0416 -24.6858 42.9 28.1 80.5 -0.0569 -0.3 4.0 GX 1+4
268.2875 -1.4248 4.6 13.4 139.0 0.3096 2.5 5.1 SW J1753.5-0127
270.3381 -25.2163 9.8 24.7 67.6 -0.2085 -1.2 8.7 GX 5-1
270.1478 -25.6763 7.5 25.2 67.5 0.2940 1.7 9.3 GRS 1758-258
273.9770 -13.9377 4.1 13.3 76.7 0.3278 2.8 6.2 GX 17+2
276.0475 -30.4475 15.1 28.0 52.9 0.1362 0.8 8.0 H1820-303
285.1132 -24.8012 9.6 22.1 34.1 0.1506 1.2 8.3 HT1900.1-2455
288.7909 11.0375 7.2 15.7 -110.6 0.1884 1.6 5.5 GRS 1915+105
299.6293 35.2621 3.5 41.8 -115.2 1.4306 3.3 4.1 Cyg X-1
263.0234 -33.8815 5.1 35.4 69.8 0.7430 2.3 3.3 GX 354-0
288.9628 4.1962 0.3 10.3 -91.8 4.5914 37.2 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
45.460600 522.760600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.5097 35.3796 3.3 44.5 170.9 3.1131 3.5 3.4 Her X-1
262.9098 -24.6519 5.4 38.4 72.0 2.8910 2.1 7.8 GX 1+4
268.4352 -1.5768 13.3 21.3 106.7 -0.4142 -0.9 8.5 SW J1753.5-0127
270.2335 -25.1055 3.3 34.5 62.9 2.9974 3.5 3.2 GX 5-1
270.5082 -25.7641 4.4 34.9 61.9 2.1442 2.6 11.2 GRS 1758-258
273.9455 -14.0370 3.2 23.5 71.0 1.8691 3.6 3.5 GX 17+2
276.0052 -30.2731 4.0 36.6 50.9 2.4390 2.9 7.0 H1820-303
285.1921 -24.9209 4.6 29.3 39.0 1.2183 2.5 8.5 HT1900.1-2455
288.7922 10.9271 1.5 6.8 -149.3 2.8143 7.6 1.2 GRS 1915+105
299.5930 35.1962 0.5 32.5 -131.7 13.6044 22.9 0.3 Cyg X-1
308.1614 40.9820 3.4 40.7 -125.6 2.8900 3.3 2.9 Cyg X-3
248.1136 44.8750 4.0 54.1 177.1 5.4551 2.9 ------ UNKNOWN
286.5856 14.2716 2.8 10.4 -160.9 1.5342 4.1 ------ UNKNOWN
328.0953 5.2345 2.8 39.0 -61.2 3.8062 4.2 ------ UNKNOWN
290.6787 59.0099 4.9 54.9 -146.9 5.2477 2.4 ------ UNKNOWN
Plot creation:
Fri Jun 26 00:48:23 EDT 2015