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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
327.1112 -10.5323 0.0076 31.5589 101.4708 2.2703735 25.171 TRIG_00506902
Foreground time interval of the image:
-0.416 12.140 (delta_t = 12.556 [sec])
Background time interval of the image:
-109.523 -0.416 (delta_t = 109.107 [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 1.024000
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 1.024000
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 1.024000
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 -0.416 sec. to 12.140 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.29207 ( -0.102096 0.101387 )
Norm@50keV : 1.12661E-02 ( -0.000658653 0.000658625 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.16 using 59 PHA bins.
# Reduced chi-squared = 1.143 for 57 degrees of freedom
# Null hypothesis probability = 2.141087e-01
Photon flux (15-150 keV) in 12.56 sec: 1.34213 ( -0.0815822 0.0817047 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.40102e-06 ( -8.97561e-08 9.01115e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.416 sec. to 12.140 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.927805 ( -0.435701 0.347119 )
Epeak [keV] : 155.912 ( -57.7798 -155.913 )
Norm@50keV : 1.68791E-02 ( -0.00577492 0.0100619 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.68 using 59 PHA bins.
# Reduced chi-squared = 1.119 for 56 degrees of freedom
# Null hypothesis probability = 2.512991e-01
Photon flux (15-150 keV) in 12.56 sec: 1.32071 ( -0.08488 0.08485 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.36865e-06 ( -9.80057e-08 9.74405e-08 ) ergs/cm2
Band function
Time interval is from -0.416 sec. to 12.140 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.97143 ( -5.30358 -4.97143 )
beta : -1.36221 ( -0.131146 0.113563 )
Epeak [keV] : 25.5702 ( -11.9619 4.44462 )
Norm@50keV : 831.439 ( -48.4382 2464.4 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.11 using 59 PHA bins.
# Reduced chi-squared = 1.093 for 55 degrees of freedom
# Null hypothesis probability = 2.960081e-01
Photon flux (15-150 keV) in 12.56 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] : 17.6104 (-1.31694 1.45514)
R^2/D10^2 : 9.18677E-02 (-0.0217416 0.0279273)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 113.98 using 59 PHA bins.
# Reduced chi-squared = 1.9997 for 57 degrees of freedom
# Null hypothesis probability = 1.120249e-05
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.214e-08 8.239e-09
25- 50 3.281e-07 2.769e-08
50-150 7.343e-07 7.593e-08
15-150 1.135e-06 9.137e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 5.60045 (-0.330744 0.330696)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 81.04 using 59 PHA bins.
# Reduced chi-squared = 1.422 for 57 degrees of freedom
# Null hypothesis probability = 1.990456e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.751e-07 1.181e-08
25- 50 3.369e-07 2.656e-08
50-150 7.389e-07 1.464e-07
15-150 1.251e-06 1.601e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.38238 (-1.87493 2.24622)
R1^2/D10^2 : 0.671873 (-0.327944 0.799811)
kT2 [keV] : 31.2441 (-6.60828 16.0144)
R2^2/D10^2 : 1.06633E-02 (-0.00775182 0.0100275)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.19 using 59 PHA bins.
# Reduced chi-squared = 1.131 for 55 degrees of freedom
# Null hypothesis probability = 2.355040e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.307e-07 3.300e-08
25- 50 3.349e-07 7.021e-08
50-150 9.118e-07 2.998e-07
15-150 1.377e-06 3.873e-07
Peak spectrum fit
Power-law model
Time interval is from 6.040 sec. to 7.040 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.18388 ( -0.161979 0.159007 )
Norm@50keV : 2.70122E-02 ( -0.00265387 0.00265341 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.80 using 59 PHA bins.
# Reduced chi-squared = 0.9087 for 57 degrees of freedom
# Null hypothesis probability = 6.700499e-01
Photon flux (15-150 keV) in 1 sec: 3.16369 ( -0.320302 0.320856 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.75311e-07 ( -2.93328e-08 2.94889e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 6.040 sec. to 7.040 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.363835 ( -0.825912 0.689632 )
Epeak [keV] : 106.161 ( -29.7707 240.873 )
Norm@50keV : 6.70441E-02 ( -0.0352791 0.0949648 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.58 using 59 PHA bins.
# Reduced chi-squared = 0.8496 for 56 degrees of freedom
# Null hypothesis probability = 7.809998e-01
Photon flux (15-150 keV) in 1 sec: 3.08281 ( -0.32957 0.32916 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.6311e-07 ( -3.2028e-08 3.1817e-08 ) ergs/cm2
Band function
Time interval is from 6.040 sec. to 7.040 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 2.16850 ( -4.44696 -2.1685 )
beta : -1.45509 ( 1.45509 0.239332 )
Epeak [keV] : 42.9525 ( -11.4407 93.412 )
Norm@50keV : 3.24172 ( -3.24177 129.342 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.50 using 59 PHA bins.
# Reduced chi-squared = 0.8455 for 55 degrees of freedom
# Null hypothesis probability = 7.857105e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.64238e-07 ( -2.64231e-07 -3.0401e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 18.2314 (-2.07644 2.44179)
R^2/D10^2 : 0.204399 (-0.0707023 0.103213)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.14 using 59 PHA bins.
# Reduced chi-squared = 1.020 for 57 degrees of freedom
# Null hypothesis probability = 4.331851e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.355e-08 2.375e-09
25- 50 6.324e-08 9.165e-09
50-150 1.531e-07 2.610e-08
15-150 2.299e-07 3.030e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 13.1499 (-1.31916 1.31907)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.57 using 59 PHA bins.
# Reduced chi-squared = 1.115 for 57 degrees of freedom
# Null hypothesis probability = 2.562514e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.274e-08 8.380e-09
25- 50 6.298e-08 3.362e-08
50-150 1.381e-07 7.245e-08
15-150 2.338e-07 1.274e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 10.9008 (-4.67447 4.72863)
R1^2/D10^2 : 0.698144 (-0.366338 1.9581)
kT2 [keV] : 35.7602 (-32.0387 -38.4761)
R2^2/D10^2 : 1.52445E-02 (-0.010413 0.0846775)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.68 using 59 PHA bins.
# Reduced chi-squared = 0.8487 for 55 degrees of freedom
# Null hypothesis probability = 7.803048e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.002e-08 1.091e-08
25- 50 6.627e-08 3.323e-08
50-150 1.802e-07 9.265e-08
15-150 2.665e-07 1.335e-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: 1.29207 ( -0.102096 0.101387 )
Norm@50keV : 1.12661E-02 ( -0.000658653 0.000658625 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.16 using 59 PHA bins.
# Reduced chi-squared = 1.143 for 57 degrees of freedom
# Null hypothesis probability = 2.141087e-01
Photon flux (15-150 keV) in 12.56 sec: 1.34213 ( -0.0815822 0.0817047 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.40102e-06 ( -8.97561e-08 9.01115e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.927805 ( -0.435701 0.347119 )
Epeak [keV] : 155.912 ( -57.7798 -155.913 )
Norm@50keV : 1.68791E-02 ( -0.00577492 0.0100619 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.68 using 59 PHA bins.
# Reduced chi-squared = 1.119 for 56 degrees of freedom
# Null hypothesis probability = 2.512991e-01
Photon flux (15-150 keV) in 12.56 sec: 1.32071 ( -0.08488 0.08485 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.36865e-06 ( -9.80057e-08 9.74405e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.97143 ( -5.53714 -4.97143 )
beta : -1.36221 ( -0.131146 0.113563 )
Epeak [keV] : 25.5702 ( -11.9619 4.44462 )
Norm@50keV : 831.439 ( -48.4382 2464.4 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.11 using 59 PHA bins.
# Reduced chi-squared = 1.093 for 55 degrees of freedom
# Null hypothesis probability = 2.960081e-01
Photon flux (15-150 keV) in 12.56 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) = 3.10e-07
S(50-100 keV) = 5.07e-07
T90 vs. Hardness ratio plot
T90 = 11.6159999370575 sec.
Hardness ratio (energy fluence ratio) = 1.63548
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.62257
Count Ratio (50-100 keV) / (15-25 keV) = 1.38141
Mask shadow pattern
IMX = -1.221479280713655E-01, IMY = -6.019483966175959E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
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:
-109.523410 -0.416000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
256.0286 -37.8428 1.9 44.4 -126.5 2.5039 6.0 2.0 4U 1700-377
256.3973 -36.5433 7.6 43.5 -125.1 0.6125 1.5 7.4 GX 349+2
262.9086 -24.6077 18.6 33.6 -111.0 0.1405 0.6 9.9 GX 1+4
264.7843 -44.4043 4.7 42.8 -139.8 -0.6042 -2.4 3.3 4U 1735-44
268.5075 -1.2949 0.0 27.9 -64.4 0.3435 2.1 12.6 SW J1753.5-0127
270.2894 -25.0738 33.8 27.7 -117.1 -0.0610 -0.3 0.4 GX 5-1
270.4312 -25.6803 5.6 27.8 -118.4 0.3691 2.1 7.9 GRS 1758-258
273.9960 -13.9379 4.2 20.8 -93.7 0.4104 2.7 5.9 GX 17+2
276.0780 -30.2291 0.0 26.5 -132.9 0.1004 0.7 11.5 H1820-303
284.8929 -25.0719 5.2 17.5 -139.9 0.2700 2.2 12.0 HT1900.1-2455
288.7462 10.9220 1.5 22.2 -8.2 1.0099 7.4 3.4 GRS 1915+105
299.5151 35.1983 2.8 45.8 13.4 1.0906 4.1 3.7 Cyg X-1
308.0992 40.9510 5.9 52.8 20.7 1.3985 2.0 0.5 Cyg X-3
262.9563 -33.8506 5.2 37.5 -125.4 0.4934 2.2 1.9 GX 354-0
286.9479 -28.2535 2.5 19.4 -149.9 0.5787 4.5 ------ UNKNOWN
253.4890 -33.5908 2.1 44.5 -119.8 3.2272 5.6 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-0.416000 12.140000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
255.8143 -37.6688 0.0 44.5 -126.2 0.3337 2.3 13.3 4U 1700-377
256.6068 -36.4142 14.9 43.3 -125.0 0.1030 0.8 8.3 GX 349+2
263.0049 -24.7692 23.1 33.6 -111.3 0.0376 0.5 1.4 GX 1+4
264.6769 -44.4377 15.6 42.9 -139.8 0.0550 0.7 2.9 4U 1735-44
268.4718 -1.5342 4.9 27.8 -64.9 0.1292 2.4 7.9 SW J1753.5-0127
270.1615 -25.0744 8.5 27.8 -117.0 -0.0764 -1.4 6.7 GX 5-1
270.1480 -25.8732 0.0 28.1 -118.4 -0.0545 -1.0 11.4 GRS 1758-258
274.0592 -14.1738 5.6 20.8 -94.3 0.1039 2.1 8.8 GX 17+2
276.0190 -30.3589 6.7 26.6 -133.0 -0.0874 -1.7 4.9 H1820-303
284.8569 -24.7839 0.0 17.3 -139.2 -0.1095 -2.6 12.7 HT1900.1-2455
288.6923 10.8330 3.7 22.1 -8.4 -0.1357 -3.1 9.2 GRS 1915+105
299.4972 35.0492 0.0 45.6 13.4 -0.0930 -1.0 10.2 Cyg X-1
308.1814 40.9201 8.0 52.7 20.7 0.3979 1.4 3.8 Cyg X-3
262.9933 -33.9681 12.5 37.6 -125.6 -0.0700 -0.9 8.0 GX 354-0
332.5723 2.9673 2.3 39.7 80.6 1.0615 5.1 ------ UNKNOWN
327.1112 -10.5323 0.5 31.6 101.5 2.2704 25.2 ------ UNKNOWN
288.1263 40.0707 2.9 50.9 1.5 0.4696 3.9 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
337.876600 879.576600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.2951 35.3044 10.2 37.9 -45.0 -0.6954 -1.1 8.3 Her X-1
268.3731 -1.4536 26.6 34.3 -113.9 0.3046 0.4 0.3 SW J1753.5-0127
273.9533 -14.0508 3.2 40.7 -133.9 2.9441 3.6 3.2 GX 17+2
275.9283 -30.4129 12.2 54.7 -145.8 2.3949 0.9 2.8 H1820-303
285.0370 -24.9231 72.8 47.1 -153.7 0.1415 0.2 0.2 HT1900.1-2455
288.8046 10.9294 0.6 11.7 -136.2 7.6067 20.7 1.0 GRS 1915+105
299.5884 35.2026 1.7 14.6 30.6 2.5035 6.8 0.1 Cyg X-1
308.1119 40.9540 1.0 22.8 41.4 5.0351 11.8 0.1 Cyg X-3
325.9807 38.4679 46.1 31.9 64.7 -0.1716 -0.3 12.6 Cyg X-2
314.6646 -31.1004 2.7 55.8 173.6 8.1221 4.3 ------ UNKNOWN
274.4171 67.8611 2.4 48.3 4.3 3.7214 4.9 ------ UNKNOWN
277.4009 6.9777 2.7 21.9 -113.7 1.6301 4.3 ------ UNKNOWN
242.6634 48.1214 3.2 49.2 -29.6 2.9220 3.6 ------ UNKNOWN
287.7780 -37.1953 4.7 58.8 -159.2 7.6699 2.5 ------ UNKNOWN
Plot creation:
Sat May 30 21:13:00 EDT 2015