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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
139.4178 87.2971 0.0038 18.2537 -9.3901 3.0606977 50.889 TRIG_00556870
Foreground time interval of the image:
-9.528 10.173 (delta_t = 19.701 [sec])
Background time interval of the image:
-229.627 -9.528 (delta_t = 220.099 [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 -9.528 sec. to 710.472 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.55196 ( -0.0928506 0.0932975 )
Norm@50keV : 8.37706E-04 ( -4.34203e-05 4.32627e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.41 using 59 PHA bins.
# Reduced chi-squared = 0.6563 for 57 degrees of freedom
# Null hypothesis probability = 9.791377e-01
Photon flux (15-150 keV) in 720 sec: 0.106109 ( -0.00545697 0.00546766 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.67652e-06 ( -3.21017e-07 3.23051e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -9.528 sec. to 710.472 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.46214 ( -0.352163 0.173834 )
Epeak [keV] : 295.281 ( -295.283 -295.283 )
Norm@50keV : 9.30769E-04 ( -0.000132659 0.000460003 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.20 using 59 PHA bins.
# Reduced chi-squared = 0.6643 for 56 degrees of freedom
# Null hypothesis probability = 9.750915e-01
Photon flux (15-150 keV) in 720 sec: 0.105554 ( -0.0057979 0.005776 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.6318e-06 ( -3.66149e-07 3.55529e-07 ) ergs/cm2
Band function
Time interval is from -9.528 sec. to 710.472 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.70784 ( -3.32354 -3.32354 )
beta : -1.61054 ( -0.124858 0.114821 )
Epeak [keV] : 27.6232 ( -24.8106 64.8976 )
Norm@50keV : 0.241941 ( -0.240342 47.2864 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 35.25 using 59 PHA bins.
# Reduced chi-squared = 0.6409 for 55 degrees of freedom
# Null hypothesis probability = 9.824008e-01
Photon flux (15-150 keV) in 720 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] : 14.4347 ( )
R^2/D10^2 : 1.31184E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 141.82 using 59 PHA bins.
# Reduced chi-squared = 2.4880 for 57 degrees of freedom
# Null hypothesis probability = 3.528098e-09
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.143e-07 4.165e-08
25- 50 1.588e-06 1.044e-07
50-150 2.212e-06 2.308e-07
15-150 4.214e-06 2.668e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 0.429899 (-0.0214172 0.0214168)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.18 using 59 PHA bins.
# Reduced chi-squared = 0.6698 for 57 degrees of freedom
# Null hypothesis probability = 9.738909e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.703e-07 4.536e-08
25- 50 1.482e-06 8.676e-08
50-150 3.250e-06 6.088e-07
15-150 5.502e-06 6.689e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.70406 (-0.927118 1.04244)
R1^2/D10^2 : 0.136520 (-0.0535844 0.097383)
kT2 [keV] : 27.0582 (-4.04116 6.13369)
R2^2/D10^2 : 1.18125E-03 (-0.000587327 0.000917427)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 34.26 using 59 PHA bins.
# Reduced chi-squared = 0.6229 for 55 degrees of freedom
# Null hypothesis probability = 9.872947e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.806e-07 1.326e-07
25- 50 1.462e-06 1.944e-07
50-150 3.385e-06 7.247e-07
15-150 5.627e-06 9.598e-07
Peak spectrum fit
Power-law model
Time interval is from 13.972 sec. to 14.972 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.89595 ( -1.26616 2.03167 )
Norm@50keV : 1.74360E-03 ( -0.00174323 0.00123826 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.27 using 59 PHA bins.
# Reduced chi-squared = 1.005 for 57 degrees of freedom
# Null hypothesis probability = 4.649770e-01
Photon flux (15-150 keV) in 1 sec: 0.249793 ( -0.249793 0.139056 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.6026e-08 ( -1.1188e-08 1.28445e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 13.972 sec. to 14.972 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.95124 ( -2.55782 2.00042 )
Epeak [keV] : 9999.34 ( )
Norm@50keV : 1.67330E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.28 using 59 PHA bins.
# Reduced chi-squared = 1.023 for 56 degrees of freedom
# Null hypothesis probability = 4.275088e-01
Photon flux (15-150 keV) in 1 sec: 0.249640 ( -0.138961 0.138866 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.58322e-08 ( -1.20642e-08 1.29748e-08 ) ergs/cm2
Band function
Time interval is from 13.972 sec. to 14.972 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -4.99996 -4.99996 )
beta : -1.95978 ( 1.92551 1.28963 )
Epeak [keV] : 19.0376 ( -19.0374 58.2566 )
Norm@50keV : 1576.62 ( -874.013 1.04977e+07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.21 using 59 PHA bins.
# Reduced chi-squared = 1.040 for 55 degrees of freedom
# Null hypothesis probability = 3.929455e-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] : 14.9316 ( )
R^2/D10^2 : 2.55897E-02 (-0.0263062 138.892)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.48 using 59 PHA bins.
# Reduced chi-squared = 1.044 for 57 degrees of freedom
# Null hypothesis probability = 3.853883e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.158e-09 2.751e-09
25- 50 1.922e-09 1.495e-09
50-150 3.909e-11 4.694e-11
15-150 6.119e-09 4.020e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 109.713 (-110.071 -110.071)
Norm : 1.06542 (-0.631877 9.35799)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.62 using 59 PHA bins.
# Reduced chi-squared = 1.011 for 57 degrees of freedom
# Null hypothesis probability = 4.520647e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.782e-09 1.892e-09
25- 50 4.898e-09 3.405e-09
50-150 8.351e-09 6.980e-09
15-150 1.603e-08 1.165e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.52807 (-2.22303 4.16114)
R1^2/D10^2 : 7.08032 (-6.99 5895.07)
kT2 [keV] : 23.0609 (-14.6251 -23.0598)
R2^2/D10^2 : 4.84999E-03 (-0.00484261 0.0175027)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.14 using 59 PHA bins.
# Reduced chi-squared = 1.021 for 55 degrees of freedom
# Null hypothesis probability = 4.320443e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.854e-09 2.473e-09
25- 50 3.378e-09 1.846e-09
50-150 1.008e-08 7.910e-09
15-150 1.731e-08 1.031e-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: 0.965429 ( -0.0547366 0.0542623 )
Norm@50keV : 1.05440E-02 ( -0.000331238 0.00033061 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.63 using 59 PHA bins.
# Reduced chi-squared = 1.169 for 57 degrees of freedom
# Null hypothesis probability = 1.794792e-01
Photon flux (15-150 keV) in 19.7 sec: 1.21202 ( -0.0386942 0.0387798 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.27427e-06 ( -7.40423e-08 7.41729e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.336345 ( -0.249532 0.235956 )
Epeak [keV] : 158.486 ( -28.3188 57.3271 )
Norm@50keV : 1.94149E-02 ( -0.00386375 0.00509042 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.04 using 59 PHA bins.
# Reduced chi-squared = 0.7864 for 56 degrees of freedom
# Null hypothesis probability = 8.766558e-01
Photon flux (15-150 keV) in 19.7 sec: 1.17555 ( -0.0407 0.04076 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.21521e-06 ( -7.89576e-08 7.87015e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99996 ( -4.86955e-05 -4.99996 )
beta : -1.03280 ( -0.0621783 0.0617943 )
Epeak [keV] : 31.4143 ( -5.24933 3.5775 )
Norm@50keV : 183.257 ( -5.5531 340.757 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.18 using 59 PHA bins.
# Reduced chi-squared = 1.094 for 55 degrees of freedom
# Null hypothesis probability = 2.936672e-01
Photon flux (15-150 keV) in 19.7 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) = 1.44e-06
S(50-100 keV) = 1.96e-06
T90 vs. Hardness ratio plot
T90 = 640 sec.
Hardness ratio (energy fluence ratio) = 1.36111
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.34031
Count Ratio (50-100 keV) / (15-25 keV) = 0.97957
Mask shadow pattern
IMX = 3.254024623275810E-01, IMY = 5.381236035920320E-02
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:
-229.627410 -9.528000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
191.4461 75.1741 3.2 13.8 37.8 0.6968 3.6 ------ UNKNOWN
305.6224 68.3389 2.1 41.6 5.1 1.6659 5.4 ------ UNKNOWN
357.9450 66.5128 3.2 43.0 -24.0 1.2188 3.7 ------ UNKNOWN
351.9042 50.6623 2.2 59.1 -24.2 7.1590 5.1 ------ UNKNOWN
117.9170 15.9242 2.9 56.7 -150.8 4.7543 4.0 ------ UNKNOWN
22.2235 54.4639 3.3 50.6 -44.6 3.9092 3.5 ------ UNKNOWN
82.8427 44.1993 2.7 41.2 -99.3 4.3737 4.3 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-9.528000 10.172620
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
139.4183 87.2971 0.2 18.3 -9.4 3.0603 51.0 ------ UNKNOWN
121.6152 27.5568 2.5 44.6 -151.7 0.5563 4.7 ------ UNKNOWN
118.0749 17.5154 2.5 55.1 -150.6 1.2026 4.7 ------ UNKNOWN
10.7720 53.2815 2.4 54.0 -37.1 1.6156 4.9 ------ UNKNOWN
88.8364 41.4944 2.4 41.4 -107.1 1.1919 4.9 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
53.972590 962.653300
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
307.8674 41.0079 6.7 51.7 26.5 -4.2946 -1.7 11.5 Cyg X-3
326.3347 38.1829 0.0 54.5 8.8 -4.4614 -1.6 11.3 Cyg X-2
292.4406 78.8632 2.7 13.6 37.4 2.3028 4.2 ------ UNKNOWN
137.5653 50.0602 2.7 37.2 -162.7 2.9247 4.3 ------ UNKNOWN
123.9072 42.4528 4.0 44.9 -148.4 3.0918 2.9 ------ UNKNOWN
134.2081 28.5336 4.4 58.8 -159.3 10.9053 2.6 ------ UNKNOWN
1.9483 33.2330 2.7 58.8 -26.0 15.1748 4.3 ------ UNKNOWN
21.4767 40.6867 4.1 50.6 -44.6 9.5172 2.8 ------ UNKNOWN
30.2350 43.8367 2.2 47.1 -53.0 13.8485 5.2 ------ UNKNOWN
Plot creation:
Sat May 30 16:46:05 EDT 2015