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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
278.1381 26.3393 0.0014 26.0370 19.0621 25.2747729 142.207 TRIG_00130088
Foreground time interval of the image:
-0.120 9.245 (delta_t = 9.365 [sec])
Background time interval of the image:
-136.355 -0.120 (delta_t = 136.235 [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 0.064000
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 0.064000
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 0.064000
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 -0.120 sec. to 12.676 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.78273 ( )
Norm@50keV : 0.132077 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 212.75 using 59 PHA bins.
# Reduced chi-squared = 3.7325 for 57 degrees of freedom
# Null hypothesis probability = 8.108927e-20
Photon flux (15-150 keV) in 12.8 sec: 18.0796 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.55741e-05 ( 0 0 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.120 sec. to 12.676 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.02618 ( -0.101512 0.0996257 )
Epeak [keV] : 80.3998 ( -2.91784 3.47757 )
Norm@50keV : 0.266806 ( -0.0229098 0.025457 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 25.90 using 59 PHA bins.
# Reduced chi-squared = 0.4624 for 56 degrees of freedom
# Null hypothesis probability = 9.998081e-01
Photon flux (15-150 keV) in 12.8 sec: 16.6573 ( -0.3359 0.3388 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.51366e-05 ( 0 0 ) ergs/cm2
Band function
Time interval is from -0.120 sec. to 12.676 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.02611 ( -0.0877776 0.0911367 )
beta : -10.0000 ( 10 20 )
Epeak [keV] : 80.3840 ( -2.49487 3.47559 )
Norm@50keV : 0.266804 ( -0.0229022 0.0254244 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 25.90 using 59 PHA bins.
# Reduced chi-squared = 0.4708 for 55 degrees of freedom
# Null hypothesis probability = 9.997129e-01
Photon flux (15-150 keV) in 12.8 sec: 16.6622 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.51235e-05 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 17.9207 ( )
R^2/D10^2 : 0.959382 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 1120.96 using 59 PHA bins.
# Reduced chi-squared = 19.6660 for 57 degrees of freedom
# Null hypothesis probability = 2.721712e-197
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.907e-07 2.054e-08
25- 50 3.645e-06 7.232e-08
50-150 8.487e-06 1.274e-07
15-150 1.292e-05 1.594e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 140.794 ( )
Norm : 72.6698 (-1.19157 1.79764)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.29 using 59 PHA bins.
# Reduced chi-squared = 0.7946 for 57 degrees of freedom
# Null hypothesis probability = 8.682928e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.378e-06 9.600e-08
25- 50 4.372e-06 1.453e-07
50-150 8.439e-06 1.455e-06
15-150 1.519e-05 1.530e-06
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.29927 (-0.428746 0.444243)
R1^2/D10^2 : 9.59243 (-1.54774 1.93951)
kT2 [keV] : 25.4559 (-0.924232 1.05355)
R2^2/D10^2 : 0.195228 (-0.0316388 0.0343804)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.68 using 59 PHA bins.
# Reduced chi-squared = 0.6850 for 55 degrees of freedom
# Null hypothesis probability = 9.641431e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.848e-06 9.280e-08
25- 50 4.520e-06 9.792e-08
50-150 8.508e-06 1.536e-07
15-150 1.488e-05 2.752e-07
Peak spectrum fit
Power-law model
Time interval is from 0.544 sec. to 1.544 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.39984 ( )
Norm@50keV : 0.360102 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 165.62 using 59 PHA bins.
# Reduced chi-squared = 2.9057 for 57 degrees of freedom
# Null hypothesis probability = 1.569646e-12
Photon flux (15-150 keV) in 1 sec: 43.8522 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.47966e-06 ( 0 0 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.544 sec. to 1.544 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.602717 ( -0.127885 0.124693 )
Epeak [keV] : 106.319 ( -6.78649 8.83627 )
Norm@50keV : 0.776242 ( -0.0854008 0.0982066 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 31.12 using 59 PHA bins.
# Reduced chi-squared = 0.5557 for 56 degrees of freedom
# Null hypothesis probability = 9.971626e-01
Photon flux (15-150 keV) in 1 sec: 41.6313 ( -0.8337 0.8377 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.40623e-06 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.544 sec. to 1.544 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.602653 ( -0.127045 0.110767 )
beta : -10.0000 ( 10 20 )
Epeak [keV] : 106.300 ( -4.04881 8.82372 )
Norm@50keV : 0.776279 ( -0.0853282 0.0982424 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 31.12 using 59 PHA bins.
# Reduced chi-squared = 0.5658 for 55 degrees of freedom
# Null hypothesis probability = 9.961099e-01
Photon flux (15-150 keV) in 1 sec: 41.7249 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.40446e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 19.4420 ( )
R^2/D10^2 : 2.13203 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 516.01 using 59 PHA bins.
# Reduced chi-squared = 9.0527 for 57 degrees of freedom
# Null hypothesis probability = 3.633976e-75
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.571e-07 4.650e-09
25- 50 7.676e-07 1.800e-08
50-150 2.142e-06 4.800e-08
15-150 3.066e-06 5.250e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 187.890 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 240.78 using 59 PHA bins.
# Reduced chi-squared = 4.2243 for 57 degrees of freedom
# Null hypothesis probability = 1.922018e-24
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.679e-07 8.500e-09
25- 50 9.000e-07 1.640e-08
50-150 1.974e-06 3.500e-08
15-150 3.342e-06 6.650e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.58539 (-0.683004 0.737679)
R1^2/D10^2 : 17.0785 (-3.68396 5.05612)
kT2 [keV] : 27.2675 (-1.36039 1.65644)
R2^2/D10^2 : 0.527680 (-0.111133 0.120596)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 30.05 using 59 PHA bins.
# Reduced chi-squared = 0.5464 for 55 degrees of freedom
# Null hypothesis probability = 9.975529e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.037e-07 1.855e-08
25- 50 8.550e-07 2.815e-08
50-150 2.238e-06 7.150e-08
15-150 3.396e-06 1.010e-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: 1.75633 ( )
Norm@50keV : 0.173686 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 260.08 using 59 PHA bins.
# Reduced chi-squared = 4.5629 for 57 degrees of freedom
# Null hypothesis probability = 1.010295e-27
Photon flux (15-150 keV) in 9.365 sec: 23.5405 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.50036e-05 ( 0 0 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.915518 ( -0.100752 0.0989032 )
Epeak [keV] : 80.9948 ( -2.65932 3.10558 )
Norm@50keV : 0.378683 ( -0.0321434 0.0356627 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 22.66 using 59 PHA bins.
# Reduced chi-squared = 0.4047 for 56 degrees of freedom
# Null hypothesis probability = 9.999789e-01
Photon flux (15-150 keV) in 9.365 sec: 21.5937 ( -0.424 0.4275 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.46031e-05 ( 0 0 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.915433 ( -0.0829291 0.100006 )
beta : -10.0000 ( 10 5.32907e-14 )
Epeak [keV] : 80.9784 ( -2.25347 3.10455 )
Norm@50keV : 0.378694 ( -0.0321378 0.0356166 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 22.66 using 59 PHA bins.
# Reduced chi-squared = 0.4121 for 55 degrees of freedom
# Null hypothesis probability = 9.999663e-01
Photon flux (15-150 keV) in 9.365 sec: 21.6095 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.46038e-05 ( 0 0 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 4.36e-06
S(50-100 keV) = 5.06e-06
T90 vs. Hardness ratio plot
T90 = 8.83599999547005 sec.
Hardness ratio (energy fluence ratio) = 1.16055
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.43961
Count Ratio (50-100 keV) / (15-25 keV) = 0.980878
Mask shadow pattern
IMX = 4.617440444879775E-01, IMY = -1.595507843272130E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.064000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.064000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.064000
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:
-136.355410 -0.120000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.5945 35.3952 4.2 4.3 40.2 0.3087 2.7 7.4 Her X-1
288.7862 10.9243 2.5 43.7 28.4 1.2702 4.6 1.5 GRS 1915+105
299.5991 35.1987 0.5 39.0 -11.1 3.6847 23.8 0.5 Cyg X-1
308.1208 40.9801 3.8 43.6 -22.5 0.6055 3.1 1.7 Cyg X-3
326.0431 38.3955 70.9 57.4 -25.8 -0.1325 -0.2 7.5 Cyg X-2
274.7161 10.6811 2.6 35.0 45.5 0.9351 4.4 ------ UNKNOWN
238.2998 16.3173 2.0 24.4 119.5 0.8285 5.7 ------ UNKNOWN
302.7493 52.6102 2.6 38.4 -39.4 0.7630 4.5 ------ UNKNOWN
293.6158 61.3627 2.5 35.1 -55.3 0.8804 4.6 ------ UNKNOWN
177.3724 56.3464 2.5 50.1 -133.7 2.7702 4.6 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-0.120000 9.244600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.4333 35.4077 6.5 4.2 41.3 0.3069 1.7 4.1 Her X-1
288.7453 10.9751 8.9 43.6 28.4 -0.5472 -1.3 3.6 GRS 1915+105
299.7135 35.2747 12.8 39.0 -11.3 0.2108 0.9 7.5 Cyg X-1
308.0299 40.9430 26.9 43.6 -22.4 -0.1328 -0.4 3.7 Cyg X-3
326.1961 38.4433 4.5 57.5 -25.9 2.9603 2.6 7.4 Cyg X-2
274.2058 8.2890 2.4 36.8 48.5 1.5927 4.7 ------ UNKNOWN
260.2902 11.8518 2.3 27.8 69.2 1.2390 4.9 ------ UNKNOWN
278.1381 26.3393 0.1 26.0 19.1 25.2746 142.2 ------ UNKNOWN
314.9451 34.3311 2.3 51.0 -16.6 2.1117 5.0 ------ UNKNOWN
173.8636 46.0278 3.8 55.2 -145.4 3.8977 3.0 ------ UNKNOWN
279.2378 77.4252 3.1 41.0 -80.8 2.8729 3.7 ------ UNKNOWN
264.6866 78.6385 3.8 40.8 -85.8 2.4914 3.1 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
63.644600 302.966800
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.5164 35.4749 5.8 22.2 170.0 0.3325 2.0 8.5 Her X-1
268.1628 -1.4877 0.0 29.4 70.5 0.2810 1.1 12.5 SW J1753.5-0127
273.9890 -14.1650 3.7 40.7 56.1 -1.6015 -3.1 7.8 GX 17+2
288.8195 10.8686 2.2 18.4 14.7 0.8120 5.2 4.8 GRS 1915+105
299.5872 35.1987 0.3 20.4 -71.2 6.9792 37.3 0.2 Cyg X-1
308.0546 40.9633 1.5 28.7 -78.5 1.8790 7.8 2.6 Cyg X-3
326.1379 38.4411 4.8 41.8 -69.3 1.5982 2.4 7.3 Cyg X-2
315.4304 23.8280 3.7 33.7 -44.2 0.6634 3.1 ------ UNKNOWN
223.1184 69.1613 3.1 53.3 -151.4 2.1932 3.8 ------ UNKNOWN
Plot creation:
Sun May 31 16:45:46 EDT 2015