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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
7.3590 36.7846 0.0136 29.6909 -64.1589 1.1365816 14.225 TRIG_00206773
Foreground time interval of the image:
-20.460 20.476 (delta_t = 40.936 [sec])
Background time interval of the image:
-239.672 -20.460 (delta_t = 219.212 [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 1.024000
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 1.024000
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 1.024000
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 -20.460 sec. to 20.476 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.69785 ( -0.179821 0.184898 )
Norm@50keV : 1.80876E-03 ( -0.00020791 0.000204879 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.72 using 59 PHA bins.
# Reduced chi-squared = 1.083 for 57 degrees of freedom
# Null hypothesis probability = 3.113127e-01
Photon flux (15-150 keV) in 40.94 sec: 0.240043 ( -0.0250099 0.0250253 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.85737e-07 ( -8.22521e-08 8.3421e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -20.460 sec. to 20.476 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.19050 ( -0.818533 0.624674 )
Epeak [keV] : 73.3628 ( -23.3006 -73.3628 )
Norm@50keV : 3.40634E-03 ( -0.00172359 0.00589051 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.20 using 59 PHA bins.
# Reduced chi-squared = 1.075 for 56 degrees of freedom
# Null hypothesis probability = 3.263862e-01
Photon flux (15-150 keV) in 40.94 sec: 0.235369 ( -0.025863 0.025829 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.55875e-07 ( -9.08622e-08 9.28274e-08 ) ergs/cm2
Band function
Time interval is from -20.460 sec. to 20.476 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.18448 ( 1.17152 6.14522 )
beta : -2.36478 ( 2.40267 4.12167 )
Epeak [keV] : 72.7595 ( -71.7448 258.298 )
Norm@50keV : 3.43428E-03 ( -0.00181509 0.073264 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.19 using 59 PHA bins.
# Reduced chi-squared = 1.094 for 55 degrees of freedom
# Null hypothesis probability = 2.933734e-01
Photon flux (15-150 keV) in 40.94 sec: 0.235312 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 6.55335e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 12.6816 (-1.60043 1.83589)
R^2/D10^2 : 4.79302E-02 (-0.0186375 0.0305087)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 79.98 using 59 PHA bins.
# Reduced chi-squared = 1.403 for 57 degrees of freedom
# Null hypothesis probability = 2.401775e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.693e-08 1.206e-08
25- 50 2.243e-07 2.868e-08
50-150 2.247e-07 4.806e-08
15-150 5.160e-07 6.857e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 130.088 (-46.3568 -128.461)
Norm : 1.00489 (-0.118802 0.15752)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.27 using 59 PHA bins.
# Reduced chi-squared = 1.057 for 57 degrees of freedom
# Null hypothesis probability = 3.582657e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.067e-07 1.595e-08
25- 50 1.936e-07 3.549e-08
50-150 3.590e-07 1.860e-07
15-150 6.593e-07 2.264e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.68860 (-1.68954 2.19096)
R1^2/D10^2 : 0.538037 (-0.359203 1.5851)
kT2 [keV] : 20.0066 (-4.33615 8.82171)
R2^2/D10^2 : 7.20843E-03 (-0.00544903 0.0117846)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.39 using 59 PHA bins.
# Reduced chi-squared = 1.080 for 55 degrees of freedom
# Null hypothesis probability = 3.188732e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.101e-07 5.715e-08
25- 50 1.908e-07 8.742e-08
50-150 3.423e-07 1.873e-07
15-150 6.433e-07 2.787e-07
Peak spectrum fit
Power-law model
Time interval is from 0.108 sec. to 1.108 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.69424 ( -0.193459 0.201324 )
Norm@50keV : 1.23190E-02 ( -0.00157485 0.00154891 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.36 using 59 PHA bins.
# Reduced chi-squared = 0.8836 for 57 degrees of freedom
# Null hypothesis probability = 7.204935e-01
Photon flux (15-150 keV) in 1 sec: 1.63283 ( -0.187823 0.187906 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.14113e-07 ( -1.52054e-08 1.54202e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.108 sec. to 1.108 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.896917 ( -1.10422 0.863304 )
Epeak [keV] : 63.6275 ( -16.2184 -63.6262 )
Norm@50keV : 3.32997E-02 ( -0.033302 0.0973984 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.05 using 59 PHA bins.
# Reduced chi-squared = 0.8579 for 56 degrees of freedom
# Null hypothesis probability = 7.662995e-01
Photon flux (15-150 keV) in 1 sec: 1.58955 ( -0.19561 0.19426 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.07172e-07 ( -1.67722e-08 1.7307e-08 ) ergs/cm2
Band function
Time interval is from 0.108 sec. to 1.108 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.863400 ( 0.835703 2.09751 )
beta : -2.39471 ( 2.42641 0.781206 )
Epeak [keV] : 61.6644 ( -59.8541 136.274 )
Norm@50keV : 3.50733E-02 ( -0.0390896 118.07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.74 using 59 PHA bins.
# Reduced chi-squared = 0.8680 for 55 degrees of freedom
# Null hypothesis probability = 7.457137e-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] : 12.6051 (-1.5211 1.74463)
R^2/D10^2 : 0.344661 (-0.130284 0.204764)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.86 using 59 PHA bins.
# Reduced chi-squared = 1.015 for 57 degrees of freedom
# Null hypothesis probability = 4.431893e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.161e-08 2.379e-09
25- 50 3.867e-08 6.220e-09
50-150 3.813e-08 9.030e-09
15-150 8.841e-08 1.480e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 129.475 (-48.3373 -127.668)
Norm : 6.86466 (-0.836382 1.16642)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.54 using 59 PHA bins.
# Reduced chi-squared = 0.8515 for 57 degrees of freedom
# Null hypothesis probability = 7.800211e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.782e-08 3.600e-09
25- 50 3.228e-08 6.970e-09
50-150 5.974e-08 3.483e-08
15-150 1.098e-07 4.450e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.20813 (-2.3677 -4.20949)
R1^2/D10^2 : 9.06688 (-8.5609 1082.91)
kT2 [keV] : 15.6966 (-2.94993 -15.6987)
R2^2/D10^2 : 0.135432 (-0.13503 0.0775399)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.69 using 59 PHA bins.
# Reduced chi-squared = 0.8853 for 55 degrees of freedom
# Null hypothesis probability = 7.128410e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.742e-08 8.403e-09
25- 50 3.304e-08 1.283e-08
50-150 4.908e-08 2.372e-08
15-150 9.953e-08 4.106e-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: 1.69785 ( -0.179821 0.184898 )
Norm@50keV : 1.80876E-03 ( -0.00020791 0.000204879 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.72 using 59 PHA bins.
# Reduced chi-squared = 1.083 for 57 degrees of freedom
# Null hypothesis probability = 3.113127e-01
Photon flux (15-150 keV) in 40.94 sec: 0.240043 ( -0.0250099 0.0250253 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.85737e-07 ( -8.22521e-08 8.3421e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.19050 ( -0.818533 0.624674 )
Epeak [keV] : 73.3628 ( -23.3006 -73.3628 )
Norm@50keV : 3.40634E-03 ( -0.00172359 0.00589051 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.20 using 59 PHA bins.
# Reduced chi-squared = 1.075 for 56 degrees of freedom
# Null hypothesis probability = 3.263862e-01
Photon flux (15-150 keV) in 40.94 sec: 0.235369 ( -0.025863 0.025829 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.55875e-07 ( -9.08622e-08 9.28274e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.18448 ( 1.17152 6.14519 )
beta : -2.36478 ( 2.40267 4.12167 )
Epeak [keV] : 72.7595 ( -71.7448 258.289 )
Norm@50keV : 3.43428E-03 ( -0.0018151 0.122423 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.19 using 59 PHA bins.
# Reduced chi-squared = 1.094 for 55 degrees of freedom
# Null hypothesis probability = 2.933734e-01
Photon flux (15-150 keV) in 40.94 sec: 0.235312 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 6.55335e-07 ( 0 0 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 1.85e-07
S(50-100 keV) = 2.29e-07
T90 vs. Hardness ratio plot
T90 = 37.6800000071526 sec.
Hardness ratio (energy fluence ratio) = 1.23784
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.15486
Count Ratio (50-100 keV) / (15-25 keV) = 0.751752
Mask shadow pattern
IMX = 2.485279971674947E-01, IMY = 5.131652843505772E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
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:
-239.672000 -20.460000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
299.5946 35.1959 0.5 38.6 41.9 7.5167 21.5 0.4 Cyg X-1
308.2882 40.9820 4.8 30.1 36.9 0.4838 2.4 8.3 Cyg X-3
326.1650 38.3172 13.3 26.6 8.1 0.1390 0.9 0.4 Cyg X-2
150.2823 61.7235 3.4 55.2 163.9 3.3199 3.4 ------ UNKNOWN
124.6615 62.4064 3.1 51.5 178.1 1.4377 3.7 ------ UNKNOWN
108.7735 50.2292 3.8 59.0 -166.1 3.0043 3.1 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-20.460000 20.476000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
299.7933 35.1189 23.7 38.6 41.7 -0.0624 -0.5 11.1 Cyg X-1
307.9702 41.0933 7.2 30.2 37.5 0.1401 1.6 10.6 Cyg X-3
326.1694 38.3220 1387.5 26.6 8.1 -0.0005 -0.0 0.1 Cyg X-2
313.2330 21.8908 2.7 45.7 17.4 0.5927 4.2 ------ UNKNOWN
331.1842 30.4464 2.0 33.2 -3.8 0.4242 5.6 ------ UNKNOWN
94.6240 56.4156 2.6 49.5 -160.9 0.5568 4.4 ------ UNKNOWN
23.0610 50.0361 2.7 24.6 -101.3 0.3223 4.2 ------ UNKNOWN
7.3590 36.7846 0.8 29.7 -64.2 1.1362 14.2 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
341.928600 962.408000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
83.6316 22.0213 0.4 50.6 -17.0 24.0855 31.7 0.4 Crab
110.6312 -17.7435 2.7 38.5 51.6 3.5735 4.2 ------ UNKNOWN
37.8174 -73.1204 3.9 49.4 158.4 2.8383 3.0 ------ UNKNOWN
98.7557 6.8104 3.0 43.7 10.4 1.9973 3.8 ------ UNKNOWN
359.3168 -49.8207 3.0 57.7 -167.3 6.4175 3.9 ------ UNKNOWN
64.9964 10.2442 3.6 37.4 -41.5 1.4443 3.2 ------ UNKNOWN
12.0325 -26.0781 2.7 51.4 -136.5 9.3437 4.2 ------ UNKNOWN
Plot creation:
Sun May 31 13:36:55 EDT 2015