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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
112.2966 -5.8517 0.0172 27.5053 -116.1263 0.9023928 11.193 TRIG_00429357
Foreground time interval of the image:
-3.936 35.064 (delta_t = 39.000 [sec])
Background time interval of the image:
-239.936 -3.936 (delta_t = 236.000 [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 4.096000
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 4.096000
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 4.096000
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 -3.936 sec. to 35.064 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.67637 ( -0.245559 0.255331 )
Norm@50keV : 1.46103E-03 ( -0.00022523 0.000219257 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.06 using 59 PHA bins.
# Reduced chi-squared = 0.9660 for 57 degrees of freedom
# Null hypothesis probability = 5.481231e-01
Photon flux (15-150 keV) in 39 sec: 0.192467 ( -0.02562 0.0256283 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.28618e-07 ( -8.53176e-08 8.75172e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -3.936 sec. to 35.064 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.67496 ( -0.918092 1.21037 )
Epeak [keV] : 9999.12 ( )
Norm@50keV : 1.46381E-03 ( -0.000226877 0.00337236 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.06 using 59 PHA bins.
# Reduced chi-squared = 0.9833 for 56 degrees of freedom
# Null hypothesis probability = 5.103242e-01
Photon flux (15-150 keV) in 39 sec: 0.192449 ( -0.025716 0.02558 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.2776e-07 ( -9.2586e-08 8.74068e-08 ) ergs/cm2
Band function
Time interval is from -3.936 sec. to 35.064 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.21065 ( 1.21726 6.11144 )
beta : -1.74763 ( 1.74749 0.313121 )
Epeak [keV] : 55.8400 ( -56.8693 -56.8693 )
Norm@50keV : 2.93100E-03 ( -0.00158726 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.98 using 59 PHA bins.
# Reduced chi-squared = 0.9997 for 55 degrees of freedom
# Null hypothesis probability = 4.752227e-01
Photon flux (15-150 keV) in 39 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] : 11.3997 (-1.87894 2.3905)
R^2/D10^2 : 5.51693E-02 (-0.0275391 0.051743)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.26 using 59 PHA bins.
# Reduced chi-squared = 1.233 for 57 degrees of freedom
# Null hypothesis probability = 1.114916e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.879e-08 1.598e-08
25- 50 1.739e-07 3.340e-08
50-150 1.311e-07 4.155e-08
15-150 3.638e-07 7.574e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 145.097 (-68.6717 -142.912)
Norm : 0.790445 (-0.115431 0.165498)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.76 using 59 PHA bins.
# Reduced chi-squared = 0.9783 for 57 degrees of freedom
# Null hypothesis probability = 5.215917e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.939e-08 4.370e-08
25- 50 1.464e-07 7.933e-08
50-150 2.851e-07 1.713e-07
15-150 5.109e-07 2.896e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.43125 (-2.66702 2.59839)
R1^2/D10^2 : 0.205249 (-0.12099 0.638418)
kT2 [keV] : 35.0275 (-18.9802 -37.3811)
R2^2/D10^2 : 7.81104E-04 (-0.000592706 0.00700496)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.41 using 59 PHA bins.
# Reduced chi-squared = 1.007 for 55 degrees of freedom
# Null hypothesis probability = 4.591640e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.053e-08 4.401e-08
25- 50 1.500e-07 7.699e-08
50-150 3.013e-07 1.745e-07
15-150 5.318e-07 2.684e-07
Peak spectrum fit
Power-law model
Time interval is from 2.064 sec. to 3.064 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.11468 ( -0.514402 0.488235 )
Norm@50keV : 4.96283E-03 ( -0.00132721 0.00132394 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.85 using 59 PHA bins.
# Reduced chi-squared = 1.015 for 57 degrees of freedom
# Null hypothesis probability = 4.436245e-01
Photon flux (15-150 keV) in 1 sec: 0.576497 ( -0.158132 0.159198 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.16477e-08 ( -1.51583e-08 1.54289e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 2.064 sec. to 3.064 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.11307 ( -0.520355 0.489272 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 4.98749E-03 ( -0.0013267 0.10126 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.85 using 59 PHA bins.
# Reduced chi-squared = 1.033 for 56 degrees of freedom
# Null hypothesis probability = 4.067134e-01
Photon flux (15-150 keV) in 1 sec: 0.576709 ( -0.159338 0.157773 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.16231e-08 ( -1.64868e-08 1.50726e-08 ) ergs/cm2
Band function
Time interval is from 2.064 sec. to 3.064 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.895678 ( 0.89568 0.89568 )
beta : -1.11466 ( 1.11466 0.514411 )
Epeak [keV] : 56.1033 ( -55.9239 -55.9239 )
Norm@50keV : 8.58526E-03 ( -0.00494509 0.845874 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.85 using 59 PHA bins.
# Reduced chi-squared = 1.052 for 55 degrees of freedom
# Null hypothesis probability = 3.704416e-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] : 19.9580 (-5.63361 9.71191)
R^2/D10^2 : 2.73141E-02 (-0.0195323 0.0533104)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.89 using 59 PHA bins.
# Reduced chi-squared = 1.051 for 57 degrees of freedom
# Null hypothesis probability = 3.713076e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.099e-09 1.353e-09
25- 50 1.044e-08 6.216e-09
50-150 3.082e-08 1.895e-08
15-150 4.336e-08 2.450e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-94.0477 -199.363)
Norm : 2.36945 (-0.65122 0.651246)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.19 using 59 PHA bins.
# Reduced chi-squared = 1.056 for 57 degrees of freedom
# Null hypothesis probability = 3.609745e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.900e-09 3.555e-09
25- 50 1.135e-08 6.960e-09
50-150 2.489e-08 1.520e-08
15-150 4.214e-08 2.516e-08
Double BB
R1^2/D10^2 : 9.95294E+06 ( )
kT2 [keV] : 20.8281 (-6.02579 10.657)
R2^2/D10^2 : 2.34381E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.72 using 59 PHA bins.
#Fit statistic : Chi-Squared = 57.70 using 59 PHA bins.
#Fit statistic : Chi-Squared = 57.67 using 59 PHA bins.
# Reduced chi-squared = 1.050 for 55 degrees of freedom
# Reduced chi-squared = 1.049 for 55 degrees of freedom
# Reduced chi-squared = 1.049 for 55 degrees of freedom
# Null hypothesis probability = 3.748833e-01
# Null hypothesis probability = 3.758246e-01
# Null hypothesis probability = 3.768173e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.617e-09 2.423e-09
25- 50 9.261e-09 5.430e-09
50-150 3.338e-08 2.086e-08
15-150 4.726e-08 2.757e-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: 1.67637 ( -0.245559 0.255331 )
Norm@50keV : 1.46103E-03 ( -0.00022523 0.000219257 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.06 using 59 PHA bins.
# Reduced chi-squared = 0.9660 for 57 degrees of freedom
# Null hypothesis probability = 5.481231e-01
Photon flux (15-150 keV) in 39 sec: 0.192467 ( -0.02562 0.0256283 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.28618e-07 ( -8.53176e-08 8.75172e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.67496 ( -0.918092 1.21037 )
Epeak [keV] : 9999.12 ( )
Norm@50keV : 1.46381E-03 ( -0.000226877 0.00337236 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.06 using 59 PHA bins.
# Reduced chi-squared = 0.9833 for 56 degrees of freedom
# Null hypothesis probability = 5.103242e-01
Photon flux (15-150 keV) in 39 sec: 0.192449 ( -0.025716 0.02558 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.2776e-07 ( -9.25938e-08 8.74068e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.21065 ( 1.21726 6.11147 )
beta : -1.74763 ( 1.74749 0.313121 )
Epeak [keV] : 55.8400 ( -56.8693 -56.8693 )
Norm@50keV : 2.93100E-03 ( -0.00158726 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.98 using 59 PHA bins.
# Reduced chi-squared = 0.9997 for 55 degrees of freedom
# Null hypothesis probability = 4.752227e-01
Photon flux (15-150 keV) in 39 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) = 1.42e-07
S(50-100 keV) = 1.77e-07
T90 vs. Hardness ratio plot
T90 = 36 sec.
Hardness ratio (energy fluence ratio) = 1.24648
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.22605
Count Ratio (50-100 keV) / (15-25 keV) = 0.72388
Mask shadow pattern
IMX = -2.292843605392753E-01, IMY = 4.674845188480318E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000
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:
-239.936000 -3.936000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.5521 -40.5418 1.1 16.4 110.5 1.7774 10.2 1.3 Vela X-1
156.7062 -16.7741 2.5 22.8 11.0 0.7716 4.6 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-3.936000 35.064000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.5348 -40.6098 7.0 16.5 110.5 0.1187 1.7 3.3 Vela X-1
140.1885 -4.0199 2.6 21.1 -46.1 0.3052 4.5 ------ UNKNOWN
112.2966 -5.8517 1.0 27.5 -116.1 0.9026 11.2 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
417.564600 962.118100
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9806 -15.6325 0.6 39.4 147.2 15.1063 18.8 0.5 Sco X-1
254.4798 35.5447 1289.1 13.8 -60.4 -0.0029 -0.0 12.2 Her X-1
268.3781 -1.4037 5.9 25.8 101.9 0.8609 2.0 3.0 SW J1753.5-0127
274.0118 -14.0431 9.3 39.6 102.3 1.6163 1.2 0.5 GX 17+2
288.8036 10.9340 1.5 32.2 53.3 4.0092 7.6 0.8 GRS 1915+105
299.5885 35.2178 1.1 39.3 9.2 4.9565 10.1 1.0 Cyg X-1
308.0790 40.9741 2.2 46.7 2.3 3.4569 5.3 1.9 Cyg X-3
221.4509 -19.6809 3.6 54.2 171.1 4.3695 3.3 ------ UNKNOWN
300.9560 63.7094 2.5 50.9 -28.1 3.5853 4.7 ------ UNKNOWN
253.2714 68.8828 4.1 47.0 -53.3 5.3673 2.9 ------ UNKNOWN
204.8649 23.4595 2.7 47.9 -129.0 7.3978 4.3 ------ UNKNOWN
203.2309 19.2219 2.8 50.3 -134.1 7.2676 4.1 ------ UNKNOWN
Plot creation:
Sun May 31 00:53:19 EDT 2015