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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
28.6976 55.6340 0.0026 40.7779 -150.4510 7.6037461 72.805 TRIG_00433509
Foreground time interval of the image:
-0.220 9.933 (delta_t = 10.153 [sec])
Background time interval of the image:
-239.568 -0.220 (delta_t = 239.348 [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 -0.220 sec. to 130.456 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.72288 ( -0.035363 0.0354203 )
Norm@50keV : 9.84613E-03 ( -0.000172642 0.000172626 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.58 using 59 PHA bins.
# Reduced chi-squared = 0.9751 for 57 degrees of freedom
# Null hypothesis probability = 5.285587e-01
Photon flux (15-150 keV) in 130.7 sec: 1.31831 ( -0.029153 0.0293202 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.18949e-05 ( -2.09002e-07 2.09025e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.220 sec. to 130.456 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.72256 ( -0.036671 0.0348141 )
Epeak [keV] : 9999.36 ( -9999.35 -9999.36 )
Norm@50keV : 9.85957E-03 ( -0.000171173 0.00112972 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.60 using 59 PHA bins.
# Reduced chi-squared = 0.9928 for 56 degrees of freedom
# Null hypothesis probability = 4.900551e-01
Photon flux (15-150 keV) in 130.7 sec: 1.31781 ( -0.02807 0.02835 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.1896e-05 ( -2.09538e-07 2.0699e-07 ) ergs/cm2
Band function
Time interval is from -0.220 sec. to 130.456 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.30869 ( 1.3087 6.18848 )
beta : -1.72556 ( -0.607268 0.037489 )
Epeak [keV] : 42.4102 ( -42.409 -42.409 )
Norm@50keV : 1.97707E-02 ( -0.00986937 1.70171e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.49 using 59 PHA bins.
# Reduced chi-squared = 1.009 for 55 degrees of freedom
# Null hypothesis probability = 4.559671e-01
Photon flux (15-150 keV) in 130.7 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] : 16.3096 ( )
R^2/D10^2 : 9.64731E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 861.85 using 59 PHA bins.
# Reduced chi-squared = 15.120 for 57 degrees of freedom
# Null hypothesis probability = 3.701165e-144
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.904e-07 2.673e-08
25- 50 2.953e-06 8.038e-08
50-150 5.529e-06 1.634e-07
15-150 9.173e-06 1.823e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 157.453 ( )
Norm : 5.20986 (-0.13091 0.136864)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 84.89 using 59 PHA bins.
# Reduced chi-squared = 1.489 for 57 degrees of freedom
# Null hypothesis probability = 9.694745e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.731e-06 8.234e-08
25- 50 3.234e-06 1.320e-07
50-150 6.529e-06 1.311e-06
15-150 1.149e-05 1.331e-06
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.26198 (-0.444508 0.465768)
R1^2/D10^2 : 1.31655 (-0.272608 0.362833)
kT2 [keV] : 27.9637 (-1.67958 1.97699)
R2^2/D10^2 : 1.10267E-02 (-0.0024338 0.0028643)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 76.82 using 59 PHA bins.
# Reduced chi-squared = 1.397 for 55 degrees of freedom
# Null hypothesis probability = 2.762303e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.696e-06 1.026e-07
25- 50 3.322e-06 1.052e-07
50-150 6.648e-06 2.143e-07
15-150 1.167e-05 3.196e-07
Peak spectrum fit
Power-law model
Time interval is from 10.480 sec. to 11.480 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.39885 ( -0.0666405 0.0667566 )
Norm@50keV : 8.37969E-02 ( -0.0032347 0.00323417 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.15 using 59 PHA bins.
# Reduced chi-squared = 0.8447 for 57 degrees of freedom
# Null hypothesis probability = 7.918262e-01
Photon flux (15-150 keV) in 1 sec: 10.2022 ( -0.413532 0.414121 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.09892e-07 ( -3.37641e-08 3.38281e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 10.480 sec. to 11.480 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00777 ( -0.281912 0.265455 )
Epeak [keV] : 138.371 ( -36.4541 163.144 )
Norm@50keV : 0.127910 ( -0.0311682 0.0441455 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.65 using 59 PHA bins.
# Reduced chi-squared = 0.7438 for 56 degrees of freedom
# Null hypothesis probability = 9.233404e-01
Photon flux (15-150 keV) in 1 sec: 10.0155 ( -0.4304 0.431 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.94921e-07 ( -3.5884e-08 3.5728e-08 ) ergs/cm2
Band function
Time interval is from 10.480 sec. to 11.480 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.394181 ( -0.346671 5.32886 )
beta : -1.55082 ( 1.55432 0.132494 )
Epeak [keV] : 63.8438 ( -41.8377 177.146 )
Norm@50keV : 0.311508 ( -0.196748 1987.29 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.86 using 59 PHA bins.
# Reduced chi-squared = 0.7430 for 55 degrees of freedom
# Null hypothesis probability = 9.220991e-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] : 17.1274 ( )
R^2/D10^2 : 0.752812 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 170.07 using 59 PHA bins.
# Reduced chi-squared = 2.9836 for 57 degrees of freedom
# Null hypothesis probability = 3.482359e-13
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.488e-08 3.505e-09
25- 50 1.998e-07 1.120e-08
50-150 4.194e-07 2.830e-08
15-150 6.641e-07 3.045e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 42.4895 (-1.64284 1.64257)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.42 using 59 PHA bins.
# Reduced chi-squared = 1.060 for 57 degrees of freedom
# Null hypothesis probability = 3.533033e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.058e-07 4.850e-09
25- 50 2.035e-07 8.500e-09
50-150 4.464e-07 1.930e-08
15-150 7.557e-07 3.180e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.01526 (-1.13419 1.25775)
R1^2/D10^2 : 6.00931 (-2.14133 3.81225)
kT2 [keV] : 28.9867 (-3.67596 5.58481)
R2^2/D10^2 : 9.75330E-02 (-0.0453161 0.0635859)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.71 using 59 PHA bins.
# Reduced chi-squared = 0.7583 for 55 degrees of freedom
# Null hypothesis probability = 9.068819e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.300e-08 1.284e-08
25- 50 2.024e-07 2.145e-08
50-150 5.109e-07 7.750e-08
15-150 7.962e-07 1.034e-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: 1.38905 ( -0.0358608 0.0357946 )
Norm@50keV : 5.28501E-02 ( -0.00104753 0.00104697 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.69 using 59 PHA bins.
# Reduced chi-squared = 1.082 for 57 degrees of freedom
# Null hypothesis probability = 3.122081e-01
Photon flux (15-150 keV) in 10.15 sec: 6.42033 ( -0.144489 0.144901 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.19505e-06 ( -1.03865e-07 1.03895e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.13445 ( -0.14946 0.144913 )
Epeak [keV] : 201.158 ( -52.5061 175.825 )
Norm@50keV : 6.79522E-02 ( -0.00885594 0.0104974 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.53 using 59 PHA bins.
# Reduced chi-squared = 0.9381 for 56 degrees of freedom
# Null hypothesis probability = 6.068630e-01
Photon flux (15-150 keV) in 10.15 sec: 6.30370 ( -0.1565 0.15731 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.14223e-06 ( -1.09184e-07 1.0895e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -4.80733E-02 ( -1.0557 1.83396 )
beta : -1.46672 ( -0.100227 0.0554914 )
Epeak [keV] : 52.7651 ( -16.5544 87.0417 )
Norm@50keV : 0.328932 ( -0.327593 5.59783 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.93 using 59 PHA bins.
# Reduced chi-squared = 0.8714 for 55 degrees of freedom
# Null hypothesis probability = 7.392857e-01
Photon flux (15-150 keV) in 10.15 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) = 3.25e-06
S(50-100 keV) = 3.94e-06
T90 vs. Hardness ratio plot
T90 = 114.631999969482 sec.
Hardness ratio (energy fluence ratio) = 1.21231
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.1842
Count Ratio (50-100 keV) / (15-25 keV) = 0.827688
Mask shadow pattern
IMX = -7.503218835992842E-01, IMY = 4.253591034882063E-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:
-239.568000 -0.220000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
4.6816 -3.0756 2.6 32.1 90.1 1.4847 4.4 336.0 UNKNOWN
338.8633 55.0988 3.2 56.9 179.1 3.5912 3.6 ------ UNKNOWN
51.6414 -3.2609 2.3 27.0 -17.2 0.8409 5.0 ------ UNKNOWN
346.6147 63.0392 3.2 57.3 -170.3 2.8555 3.6 ------ UNKNOWN
71.7380 19.7532 3.3 38.6 -71.1 1.6383 3.5 ------ UNKNOWN
78.8954 6.7995 3.3 47.1 -53.4 2.6575 3.5 ------ UNKNOWN
71.7772 33.6110 3.3 40.8 -92.6 2.8851 3.5 ------ UNKNOWN
54.7276 62.5648 2.7 50.4 -134.4 3.5156 4.3 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-0.220000 9.932590
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
42.6433 -21.0567 2.5 37.6 14.9 0.3803 4.5 ------ UNKNOWN
44.9803 10.0558 2.7 14.0 -39.2 0.2677 4.3 ------ UNKNOWN
52.0409 22.8074 2.6 20.9 -83.3 0.3540 4.5 ------ UNKNOWN
67.3651 -9.8638 2.7 43.3 -25.2 0.4770 4.3 ------ UNKNOWN
28.6976 55.6340 0.2 40.8 -150.5 7.6024 72.8 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
69.132590 962.458600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
83.6318 22.0169 0.6 52.4 -29.3 30.9807 20.1 0.2 Crab
308.1185 40.9485 8.5 52.4 153.8 3.7181 1.3 0.4 Cyg X-3
325.9850 38.4422 103.3 44.3 138.5 0.1844 0.1 11.4 Cyg X-2
28.6616 55.6469 1.1 0.0 -156.2 5.6072 10.8 ------ UNKNOWN
54.2624 56.3139 2.8 14.3 -59.4 1.9394 4.1 ------ UNKNOWN
95.4402 37.8918 3.0 46.9 -53.1 10.2289 3.9 ------ UNKNOWN
95.9492 38.0212 3.2 47.1 -53.6 9.3968 3.6 ------ UNKNOWN
Plot creation:
Sat May 30 23:53:25 EDT 2015