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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
172.9007 -16.1947 0.0117 35.2453 -111.9010 2.1748596 16.330 TRIG_00433273
Foreground time interval of the image:
-14.568 23.512 (delta_t = 38.080 [sec])
Background time interval of the image:
-188.651 -14.568 (delta_t = 174.083 [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 2.048000
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 2.048000
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 2.048000
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 -14.568 sec. to 23.512 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.67186 ( -0.159304 0.16274 )
Norm@50keV : 3.59404E-03 ( -0.000346927 0.000342235 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.24 using 59 PHA bins.
# Reduced chi-squared = 0.8815 for 57 degrees of freedom
# Null hypothesis probability = 7.245965e-01
Photon flux (15-150 keV) in 38.08 sec: 0.472733 ( -0.0417796 0.0418239 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.2702e-06 ( -1.29581e-07 1.31218e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -14.568 sec. to 23.512 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.57029 ( -0.611946 0.553705 )
Epeak [keV] : 198.983 ( -198.984 -198.984 )
Norm@50keV : 4.07152E-03 ( -0.0018377 0.00437721 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.15 using 59 PHA bins.
# Reduced chi-squared = 0.8955 for 56 degrees of freedom
# Null hypothesis probability = 6.949417e-01
Photon flux (15-150 keV) in 38.08 sec: 0.470493 ( -0.043421 0.043175 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.25871e-06 ( -1.45603e-07 1.39498e-07 ) ergs/cm2
Band function
Time interval is from -14.568 sec. to 23.512 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.68656 ( -4.68656 -4.68656 )
beta : -1.72807 ( -0.186949 0.174556 )
Epeak [keV] : 21.8834 ( -21.8834 4.60108 )
Norm@50keV : 577.625 ( -50.2891 2.4298e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.13 using 59 PHA bins.
# Reduced chi-squared = 0.8933 for 55 degrees of freedom
# Null hypothesis probability = 6.972431e-01
Photon flux (15-150 keV) in 38.08 sec: 0.471354 ( 6.52865 -0.04294 ) 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] : 13.0276 (-1.60975 1.83064)
R^2/D10^2 : 8.32732E-02 (-0.03122 0.0508073)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 89.31 using 59 PHA bins.
# Reduced chi-squared = 1.567 for 57 degrees of freedom
# Null hypothesis probability = 4.011181e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.141e-07 1.993e-08
25- 50 3.940e-07 4.541e-08
50-150 4.233e-07 8.400e-08
15-150 9.315e-07 1.102e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 149.861 (-53.2071 -148.413)
Norm : 1.93670 (-0.188923 0.246507)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.86 using 59 PHA bins.
# Reduced chi-squared = 0.8923 for 57 degrees of freedom
# Null hypothesis probability = 7.032620e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.894e-07 2.736e-08
25- 50 3.511e-07 1.030e-07
50-150 6.927e-07 3.422e-07
15-150 1.233e-06 4.164e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.81474 (-1.22267 1.47206)
R1^2/D10^2 : 1.09473 (-0.613449 1.66081)
kT2 [keV] : 23.6664 (-4.80476 8.33523)
R2^2/D10^2 : 7.92487E-03 (-0.00515204 0.0103845)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.12 using 59 PHA bins.
# Reduced chi-squared = 0.8750 for 55 degrees of freedom
# Null hypothesis probability = 7.326493e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.090e-07 8.048e-08
25- 50 3.329e-07 9.718e-08
50-150 7.089e-07 3.759e-07
15-150 1.251e-06 4.488e-07
Peak spectrum fit
Power-law model
Time interval is from 2.300 sec. to 3.300 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.56171 ( -0.262387 0.267852 )
Norm@50keV : 1.23949E-02 ( -0.00213704 0.00211531 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.81 using 59 PHA bins.
# Reduced chi-squared = 1.119 for 57 degrees of freedom
# Null hypothesis probability = 2.496117e-01
Photon flux (15-150 keV) in 1 sec: 1.57450 ( -0.261194 0.261574 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.16494e-07 ( -2.13659e-08 2.17189e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 2.300 sec. to 3.300 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.330210 ( -1.49868 1.15073 )
Epeak [keV] : 63.9613 ( -15.7017 172.45 )
Norm@50keV : 5.57776E-02 ( -0.0557776 0.270767 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.44 using 59 PHA bins.
# Reduced chi-squared = 1.079 for 56 degrees of freedom
# Null hypothesis probability = 3.187232e-01
Photon flux (15-150 keV) in 1 sec: 1.51883 ( -0.26615 0.26676 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.07011e-07 ( -2.19469e-08 2.3249e-08 ) ergs/cm2
Band function
Time interval is from 2.300 sec. to 3.300 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.14675 ( -0.704722 1.03159 )
beta : -1.84991 ( 9.73997 19.74 )
Epeak [keV] : 29.8656 ( -10.5822 30.3648 )
Norm@50keV : 134.976 ( -135.305 112.225 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.46 using 59 PHA bins.
# Reduced chi-squared = 1.081 for 55 degrees of freedom
# Null hypothesis probability = 3.165061e-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] : 14.1008 (-2.355 2.79298)
R^2/D10^2 : 0.231929 (-0.111362 0.211842)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.19 using 59 PHA bins.
# Reduced chi-squared = 1.126 for 57 degrees of freedom
# Null hypothesis probability = 2.390807e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.735e-09 3.125e-09
25- 50 3.646e-08 8.635e-09
50-150 4.791e-08 1.720e-08
15-150 9.411e-08 2.274e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 167.244 (-81.53 -167.035)
Norm : 6.56441 (-1.12158 1.3435)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.14 using 59 PHA bins.
# Reduced chi-squared = 1.090 for 57 degrees of freedom
# Null hypothesis probability = 2.982828e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.669e-08 9.400e-09
25- 50 3.141e-08 1.716e-08
50-150 6.472e-08 3.773e-08
15-150 1.128e-07 6.280e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.91730 (-2.56236 5.83414)
R1^2/D10^2 : 2.27281 (-1.96066 15.6483)
kT2 [keV] : 18.3986 (-4.55195 32.0677)
R2^2/D10^2 : 7.29677E-02 (-0.0714613 0.106259)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.54 using 59 PHA bins.
# Reduced chi-squared = 1.083 for 55 degrees of freedom
# Null hypothesis probability = 3.138339e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.527e-08 8.260e-09
25- 50 3.310e-08 1.714e-08
50-150 5.788e-08 3.377e-08
15-150 1.063e-07 5.690e-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: 1.67186 ( -0.159304 0.16274 )
Norm@50keV : 3.59404E-03 ( -0.000346927 0.000342235 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.24 using 59 PHA bins.
# Reduced chi-squared = 0.8815 for 57 degrees of freedom
# Null hypothesis probability = 7.245965e-01
Photon flux (15-150 keV) in 38.08 sec: 0.472733 ( -0.0417796 0.0418239 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.2702e-06 ( -1.29581e-07 1.31218e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.57029 ( -0.611946 0.553705 )
Epeak [keV] : 198.983 ( -198.984 -198.984 )
Norm@50keV : 4.07152E-03 ( -0.0018377 0.00437721 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.15 using 59 PHA bins.
# Reduced chi-squared = 0.8955 for 56 degrees of freedom
# Null hypothesis probability = 6.949417e-01
Photon flux (15-150 keV) in 38.08 sec: 0.470493 ( -0.043421 0.043175 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.25871e-06 ( -1.45603e-07 1.39498e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.68656 ( -4.68656 -4.68656 )
beta : -1.72807 ( -0.186949 0.174556 )
Epeak [keV] : 21.8834 ( -21.8834 4.60108 )
Norm@50keV : 577.625 ( -50.2891 2.4298e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.13 using 59 PHA bins.
# Reduced chi-squared = 0.8933 for 55 degrees of freedom
# Null hypothesis probability = 6.972431e-01
Photon flux (15-150 keV) in 38.08 sec: 0.471354 ( 6.52865 -0.04294 ) 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) = 3.40e-07
S(50-100 keV) = 4.27e-07
T90 vs. Hardness ratio plot
T90 = 31.2480000257492 sec.
Hardness ratio (energy fluence ratio) = 1.25588
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.15109
Count Ratio (50-100 keV) / (15-25 keV) = 0.838202
Mask shadow pattern
IMX = -2.635671270039845E-01, IMY = 6.556116806304019E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 2.048000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 2.048000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 2.048000
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:
-188.651400 -14.568000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.4548 -60.6792 20.9 57.4 -167.7 -0.4647 -0.5 5.3 Cen X-3
186.7765 -62.7896 4.5 54.5 -176.7 1.5416 2.6 3.5 GX 301-2
244.9790 -15.6200 0.5 35.6 93.3 10.8501 23.9 1.2 Sco X-1
192.2576 -62.4504 2.4 53.2 -179.4 2.5339 4.8 ------ UNKNOWN
161.7432 -27.9778 2.9 47.3 -127.3 2.9600 4.0 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-14.568000 23.512000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.2973 -60.6856 28.6 57.5 -167.6 0.1386 0.4 3.8 Cen X-3
186.6481 -62.9194 5.7 54.7 -176.7 0.5277 2.0 8.9 GX 301-2
244.8550 -15.7614 6.1 35.5 93.5 0.3314 1.9 10.2 Sco X-1
213.5545 -64.9533 2.3 54.5 168.7 1.7563 5.1 ------ UNKNOWN
172.9007 -16.1947 0.7 35.2 -111.9 2.1749 16.3 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
-618.952000 -498.898700
-338.952000 962.148000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.0961 -60.6543 20.5 57.5 -167.5 2.4805 0.6 6.7 Cen X-3
186.6295 -62.7628 5.5 54.5 -176.6 6.6878 2.1 0.9 GX 301-2
244.9835 -15.6348 0.4 35.6 93.3 69.4652 30.3 0.4 Sco X-1
206.4465 -62.8419 2.6 52.3 172.5 12.7672 4.5 ------ UNKNOWN
218.1911 27.4062 2.4 39.1 4.6 5.5193 4.9 ------ UNKNOWN
190.5431 -60.1000 2.9 51.3 -177.3 9.2040 4.0 ------ UNKNOWN
199.7573 46.5714 2.5 57.7 -16.1 16.7886 4.6 ------ UNKNOWN
190.7706 33.1751 2.6 47.0 -29.4 6.5140 4.4 ------ UNKNOWN
174.8972 22.8084 5.6 47.0 -53.3 9.6880 2.1 ------ UNKNOWN
Plot creation:
Sat May 30 23:56:58 EDT 2015