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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
239.2902 78.5624 0.0157 11.9745 -112.2494 0.7717945 12.245 TRIG_00209352
Foreground time interval of the image:
25.596 73.101 (delta_t = 47.505 [sec])
Background time interval of the image:
-199.299 25.596 (delta_t = 224.895 [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 64.000000
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 64.000000
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 64.000000
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 25.596 sec. to 326.044 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.76511 ( -0.0739237 0.0746321 )
Norm@50keV : 1.43726E-03 ( -5.74111e-05 5.71452e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.42 using 59 PHA bins.
# Reduced chi-squared = 0.7794 for 57 degrees of freedom
# Null hypothesis probability = 8.876127e-01
Photon flux (15-150 keV) in 300.4 sec: 0.195436 ( -0.00769557 0.00771617 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.98072e-06 ( -1.64218e-07 1.65057e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 25.596 sec. to 326.044 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.58937 ( -0.300067 0.230291 )
Epeak [keV] : 113.805 ( -43.8101 -113.805 )
Norm@50keV : 1.76422E-03 ( -0.000369258 0.000718933 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.31 using 59 PHA bins.
# Reduced chi-squared = 0.7733 for 56 degrees of freedom
# Null hypothesis probability = 8.925280e-01
Photon flux (15-150 keV) in 300.4 sec: 0.192866 ( -0.008648 0.008666 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.91382e-06 ( -1.97032e-07 9.86514e-08 ) ergs/cm2
Band function
Time interval is from 25.596 sec. to 326.044 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.58937 ( 1.60693 1.60693 )
beta : -8.87592 ( 9.2282 19.2282 )
Epeak [keV] : 113.785 ( -34.8043 -113.785 )
Norm@50keV : 1.76388E-03 ( -0.000373328 0.000237391 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.31 using 59 PHA bins.
# Reduced chi-squared = 0.7874 for 55 degrees of freedom
# Null hypothesis probability = 8.730031e-01
Photon flux (15-150 keV) in 300.4 sec: 0.192849 ( ) 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] : 13.0979 ( )
R^2/D10^2 : 3.22724E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 198.66 using 59 PHA bins.
# Reduced chi-squared = 3.4853 for 57 degrees of freedom
# Null hypothesis probability = 1.447837e-17
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.527e-07 2.704e-08
25- 50 1.225e-06 5.512e-08
50-150 1.334e-06 1.044e-07
15-150 2.911e-06 1.250e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 125.455 (-23.5129 23.004)
Norm : 0.799749 (-0.0383461 0.0546715)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.59 using 59 PHA bins.
# Reduced chi-squared = 0.8174 for 57 degrees of freedom
# Null hypothesis probability = 8.359900e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.245e-07 4.251e-08
25- 50 1.126e-06 7.134e-08
50-150 2.053e-06 5.428e-07
15-150 3.803e-06 5.542e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.65297 (-0.833897 0.999753)
R1^2/D10^2 : 0.475892 (-0.21356 0.433198)
kT2 [keV] : 20.8463 (-2.32546 3.33563)
R2^2/D10^2 : 4.80680E-03 (-0.00209078 0.00283032)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.55 using 59 PHA bins.
# Reduced chi-squared = 0.9373 for 55 degrees of freedom
# Null hypothesis probability = 6.071116e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.733e-07 9.883e-08
25- 50 1.093e-06 8.757e-08
50-150 2.004e-06 2.196e-07
15-150 3.770e-06 3.184e-07
Peak spectrum fit
Power-law model
Time interval is from 136.384 sec. to 137.384 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.39765 ( -0.356376 0.356926 )
Norm@50keV : 4.66886E-03 ( -0.000938389 0.000924567 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.48 using 59 PHA bins.
# Reduced chi-squared = 0.9908 for 57 degrees of freedom
# Null hypothesis probability = 4.946538e-01
Photon flux (15-150 keV) in 1 sec: 0.568278 ( -0.110662 0.110844 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.51351e-08 ( -1.01501e-08 1.03755e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 136.384 sec. to 137.384 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.39630 ( -0.874514 0.3582 )
Epeak [keV] : 9999.26 ( -9999.35 -9999.35 )
Norm@50keV : 4.68405E-03 ( -0.000942663 0.00641049 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.48 using 59 PHA bins.
# Reduced chi-squared = 1.009 for 56 degrees of freedom
# Null hypothesis probability = 4.568069e-01
Photon flux (15-150 keV) in 1 sec: 0.568991 ( -0.111275 0.110035 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.51756e-08 ( -1.02117e-08 1.00825e-08 ) ergs/cm2
Band function
Time interval is from 136.384 sec. to 137.384 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.94761 ( -4.94761 -4.94761 )
beta : -1.49199 ( -0.454926 0.402815 )
Epeak [keV] : 24.7511 ( -24.7511 71.4866 )
Norm@50keV : 449.144 ( -86.3854 2.65813e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.18 using 59 PHA bins.
# Reduced chi-squared = 1.021 for 55 degrees of freedom
# Null hypothesis probability = 4.306278e-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] : 15.5514 (-4.21935 6.15851)
R^2/D10^2 : 5.57242E-02 (-0.0370639 0.108732)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.23 using 59 PHA bins.
# Reduced chi-squared = 1.179 for 57 degrees of freedom
# Null hypothesis probability = 1.666408e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.803e-09 1.185e-09
25- 50 1.151e-08 3.804e-09
50-150 1.923e-08 8.334e-09
15-150 3.355e-08 1.125e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-95.7745 -199.363)
Norm : 2.32189 (-0.45093 0.45093)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.55 using 59 PHA bins.
# Reduced chi-squared = 1.010 for 57 degrees of freedom
# Null hypothesis probability = 4.545239e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.782e-09 3.391e-09
25- 50 1.112e-08 6.310e-09
50-150 2.439e-08 1.383e-08
15-150 4.130e-08 2.382e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.25880 (-2.39763 4.87716)
R1^2/D10^2 : 0.977704 (-0.835329 5.39038)
kT2 [keV] : 33.6231 (-14.7418 -33.7714)
R2^2/D10^2 : 3.78294E-03 (-0.00341801 0.0156023)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.08 using 59 PHA bins.
# Reduced chi-squared = 1.020 for 55 degrees of freedom
# Null hypothesis probability = 4.342184e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.016e-09 3.454e-09
25- 50 9.899e-09 5.375e-09
50-150 3.100e-08 1.838e-08
15-150 4.691e-08 2.430e-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: 1.72030 ( -0.196296 0.20351 )
Norm@50keV : 1.11067E-03 ( -0.00013928 0.000136179 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.03 using 59 PHA bins.
# Reduced chi-squared = 0.9655 for 57 degrees of freedom
# Null hypothesis probability = 5.492884e-01
Photon flux (15-150 keV) in 47.5 sec: 0.148571 ( -0.015788 0.0157911 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.87725e-07 ( -6.34315e-08 6.48261e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.59810 ( -0.803909 0.683229 )
Epeak [keV] : 146.063 ( -126.896 -147.283 )
Norm@50keV : 1.29857E-03 ( -0.000626154 0.00227775 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.95 using 59 PHA bins.
# Reduced chi-squared = 0.9812 for 56 degrees of freedom
# Null hypothesis probability = 5.147382e-01
Photon flux (15-150 keV) in 47.5 sec: 0.147762 ( -0.016435 0.016108 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.8127e-07 ( -7.39186e-08 6.99532e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.223786 ( 1.1991 1.1991 )
beta : -1.77187 ( 1.75797 0.22648 )
Epeak [keV] : 27.0781 ( -27.5799 234.399 )
Norm@50keV : 3.45399E-02 ( -0.0359592 114.193 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.67 using 59 PHA bins.
# Reduced chi-squared = 0.9940 for 55 degrees of freedom
# Null hypothesis probability = 4.871913e-01
Photon flux (15-150 keV) in 47.5 sec: 0.148019 ( 6.85198 -0.016173 ) 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) = 1.11e-06
S(50-100 keV) = 1.30e-06
T90 vs. Hardness ratio plot
T90 = 262.936000019312 sec.
Hardness ratio (energy fluence ratio) = 1.17117
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.0662
Count Ratio (50-100 keV) / (15-25 keV) = 0.692319
Mask shadow pattern
IMX = -8.030628526871948E-02, IMY = 1.963009154542183E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
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:
-199.299410 25.596000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.2808 35.3784 3.7 32.2 48.6 0.7494 3.2 8.9 Her X-1
299.5858 35.2031 0.5 45.7 -7.7 6.4363 21.6 0.2 Cyg X-1
308.0795 40.9187 2.1 44.1 -19.9 1.4588 5.5 2.5 Cyg X-3
326.1214 38.1813 9.0 53.6 -34.0 1.0010 1.3 8.8 Cyg X-2
216.8129 29.2435 2.4 40.1 102.9 2.7577 4.8 ------ UNKNOWN
252.3754 28.4802 2.4 38.8 53.2 1.8418 4.9 ------ UNKNOWN
178.5828 72.7529 2.4 21.4 -156.7 0.6991 4.9 ------ UNKNOWN
315.8284 33.6289 3.0 53.5 -22.2 1.7292 3.9 ------ UNKNOWN
115.8825 60.5039 3.0 46.6 -144.3 1.3764 3.8 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
25.596000 73.100620
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.4735 35.1967 5.0 32.4 48.4 0.2374 2.3 8.8 Her X-1
299.5810 35.2140 10.4 45.7 -7.7 -0.1412 -1.1 0.9 Cyg X-1
308.0401 40.9526 55.7 44.1 -19.9 0.0239 0.2 3.2 Cyg X-3
326.0545 38.1742 6.1 53.6 -33.9 -0.5539 -1.9 10.4 Cyg X-2
239.2903 78.5625 0.9 12.0 -112.2 0.7719 12.2 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
107.900600 423.014200
541.000000 603.110000
721.000000 783.054100
901.000000 963.060000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
299.5940 35.1957 0.6 49.8 10.0 14.4017 20.3 0.4 Cyg X-1
308.0333 40.9324 2.0 45.9 -0.6 3.1298 5.6 3.7 Cyg X-3
326.0900 38.3743 4.6 51.9 -17.5 1.5895 2.5 5.0 Cyg X-2
239.1455 78.5647 0.5 0.0 -104.0 6.0762 22.3 ------ UNKNOWN
310.7113 31.5886 3.0 55.5 -0.3 4.2824 3.9 ------ UNKNOWN
130.7035 35.2123 2.8 59.1 -166.1 8.3834 4.0 ------ UNKNOWN
340.6187 52.7177 2.5 40.9 -36.5 1.9322 4.6 ------ UNKNOWN
Plot creation:
Sun May 31 13:17:44 EDT 2015