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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
281.1414 59.6227 0.0080 19.2825 -6.4141 0.7235869 24.019 TRIG_00604232
Foreground time interval of the image:
-0.108 6.676 (delta_t = 6.784 [sec])
Background time interval of the image:
-232.475 -0.108 (delta_t = 232.367 [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 -0.108 sec. to 6.676 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.84272 ( -0.137866 0.141285 )
Norm@50keV : 5.86057E-03 ( -0.000518551 0.000510705 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 79.23 using 59 PHA bins.
# Reduced chi-squared = 1.390 for 57 degrees of freedom
# Null hypothesis probability = 2.737405e-02
Photon flux (15-150 keV) in 6.784 sec: 0.821338 ( -0.0617688 0.0617931 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.65609e-07 ( -3.23219e-08 3.27411e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.108 sec. to 6.676 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.81477 ( -0.52669 0.460764 )
Epeak [keV] : 278.986 ( )
Norm@50keV : 6.08107E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 79.22 using 59 PHA bins.
# Reduced chi-squared = 1.415 for 56 degrees of freedom
# Null hypothesis probability = 2.224392e-02
Photon flux (15-150 keV) in 6.784 sec: 0.820254 ( -0.063868 0.062656 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.63576e-07 ( -3.7719e-08 3.4462e-08 ) ergs/cm2
Band function
Time interval is from -0.108 sec. to 6.676 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.59185 ( -5.10033 -4.59185 )
beta : -2.04993 ( -0.202596 0.183282 )
Epeak [keV] : 25.0385 ( -3.06435 2.82877 )
Norm@50keV : 424.903 ( -31.4647 2167.87 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.42 using 59 PHA bins.
# Reduced chi-squared = 1.317 for 55 degrees of freedom
# Null hypothesis probability = 5.774235e-02
Photon flux (15-150 keV) in 6.784 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] : 9.54707 ( )
R^2/D10^2 : 0.450289 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 124.02 using 59 PHA bins.
# Reduced chi-squared = 2.1758 for 57 degrees of freedom
# Null hypothesis probability = 7.056317e-07
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.572e-08 7.110e-09
25- 50 1.296e-07 1.140e-08
50-150 5.903e-08 1.379e-08
15-150 2.443e-07 2.283e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 89.5210 (-22.3804 36.4834)
Norm : 3.71277 (-0.410817 0.488296)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 81.66 using 59 PHA bins.
# Reduced chi-squared = 1.433 for 57 degrees of freedom
# Null hypothesis probability = 1.776922e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.571e-08 7.625e-09
25- 50 1.110e-07 9.091e-09
50-150 1.685e-07 6.092e-08
15-150 3.452e-07 6.055e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.95349 (-0.815772 0.876564)
R1^2/D10^2 : 1.25793 (-0.44589 0.735657)
kT2 [keV] : 35.4861 (-9.66801 21.5972)
R2^2/D10^2 : 2.88452E-03 (-0.00207714 0.00508901)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.82 using 59 PHA bins.
# Reduced chi-squared = 1.197 for 55 degrees of freedom
# Null hypothesis probability = 1.505956e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.928e-08 1.162e-08
25- 50 1.117e-07 2.151e-08
50-150 2.000e-07 9.800e-08
15-150 3.810e-07 1.163e-07
Peak spectrum fit
Power-law model
Time interval is from -0.108 sec. to 0.892 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.45831 ( -0.153052 0.154072 )
Norm@50keV : 1.56299E-02 ( -0.00145405 0.00144564 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.40 using 59 PHA bins.
# Reduced chi-squared = 1.060 for 57 degrees of freedom
# Null hypothesis probability = 3.538872e-01
Photon flux (15-150 keV) in 1 sec: 1.93018 ( -0.174696 0.174793 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.49341e-07 ( -1.53756e-08 1.55249e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.108 sec. to 0.892 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.23268 ( -0.608103 0.315473 )
Epeak [keV] : 164.058 ( -164.065 -164.065 )
Norm@50keV : 2.05551E-02 ( -0.00698221 0.0218212 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.91 using 59 PHA bins.
# Reduced chi-squared = 1.070 for 56 degrees of freedom
# Null hypothesis probability = 3.359586e-01
Photon flux (15-150 keV) in 1 sec: 1.91508 ( -0.1784 0.17828 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.46525e-07 ( -1.7153e-08 1.6784e-08 ) ergs/cm2
Band function
Time interval is from -0.108 sec. to 0.892 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.80748 ( -12.1345 -4.36687 )
beta : -1.63439 ( -0.254393 0.195193 )
Epeak [keV] : 28.9391 ( -9.47454 5.06091 )
Norm@50keV : 104.520 ( -104.533 228.841 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.32 using 59 PHA bins.
# Reduced chi-squared = 1.024 for 55 degrees of freedom
# Null hypothesis probability = 4.254059e-01
Photon flux (15-150 keV) in 1 sec: 1.90147 ( 5.09853 -0.17791 ) 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] : 13.6281 (-1.66663 2.02788)
R^2/D10^2 : 0.305665 (-0.117419 0.179403)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 91.78 using 59 PHA bins.
# Reduced chi-squared = 1.610 for 57 degrees of freedom
# Null hypothesis probability = 2.387899e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.202e-08 1.994e-09
25- 50 4.350e-08 5.010e-09
50-150 5.245e-08 1.121e-08
15-150 1.080e-07 1.200e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 7.90160 (-0.709564 0.709564)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.67 using 59 PHA bins.
# Reduced chi-squared = 1.064 for 57 degrees of freedom
# Null hypothesis probability = 3.449681e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.974e-08 2.355e-09
25- 50 3.796e-08 9.070e-09
50-150 8.326e-08 3.979e-08
15-150 1.410e-07 4.385e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.12129 (-1.47818 1.65802)
R1^2/D10^2 : 1.38342 (-0.622688 1.274)
kT2 [keV] : 36.0497 (-10.5062 30.282)
R2^2/D10^2 : 8.48760E-03 (-0.00681857 0.0180124)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.15 using 59 PHA bins.
# Reduced chi-squared = 0.9845 for 55 degrees of freedom
# Null hypothesis probability = 5.072273e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.821e-08 5.959e-09
25- 50 4.007e-08 1.157e-08
50-150 9.270e-08 4.605e-08
15-150 1.510e-07 5.887e-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: 1.84272 ( -0.137866 0.141285 )
Norm@50keV : 5.86057E-03 ( -0.000518551 0.000510705 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 79.23 using 59 PHA bins.
# Reduced chi-squared = 1.390 for 57 degrees of freedom
# Null hypothesis probability = 2.737405e-02
Photon flux (15-150 keV) in 6.784 sec: 0.821338 ( -0.0617688 0.0617931 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.65609e-07 ( -3.23219e-08 3.27411e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.81477 ( -0.52669 0.460764 )
Epeak [keV] : 278.986 ( )
Norm@50keV : 6.08107E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 79.22 using 59 PHA bins.
# Reduced chi-squared = 1.415 for 56 degrees of freedom
# Null hypothesis probability = 2.224392e-02
Photon flux (15-150 keV) in 6.784 sec: 0.820254 ( -0.063868 0.062656 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.63576e-07 ( -3.7719e-08 3.4462e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.59185 ( -5.10033 -4.59185 )
beta : -2.04993 ( -0.202596 0.183282 )
Epeak [keV] : 25.0385 ( -3.06435 2.82877 )
Norm@50keV : 424.903 ( -31.4647 2167.87 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.42 using 59 PHA bins.
# Reduced chi-squared = 1.317 for 55 degrees of freedom
# Null hypothesis probability = 5.774235e-02
Photon flux (15-150 keV) in 6.784 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) = 1.05e-07
S(50-100 keV) = 1.17e-07
T90 vs. Hardness ratio plot
T90 = 6.01599997282028 sec.
Hardness ratio (energy fluence ratio) = 1.11429
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.18994
Count Ratio (50-100 keV) / (15-25 keV) = 0.591482
Mask shadow pattern
IMX = 3.476618081882924E-01, IMY = 3.908299903426914E-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:
-232.475400 -0.108000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.5010 35.3674 99.0 14.6 116.7 -0.0250 -0.1 2.6 Her X-1
299.5915 35.2156 1.2 37.3 39.7 3.8961 9.7 0.8 Cyg X-1
308.0847 40.9501 2.3 39.5 26.0 1.8611 4.9 1.2 Cyg X-3
326.0415 38.4416 0.0 52.2 17.7 -2.0285 -2.6 9.4 Cyg X-2
251.7967 52.8548 3.1 3.0 -56.0 0.7028 3.7 ------ UNKNOWN
288.1304 60.7790 2.5 22.9 -7.1 0.9622 4.6 ------ UNKNOWN
211.4953 23.4468 2.6 41.0 -169.9 1.4195 4.4 ------ UNKNOWN
342.2398 67.8101 2.9 45.1 -22.6 1.4403 4.0 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-0.108000 6.676000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.2039 35.3866 0.0 14.6 117.7 0.0571 1.7 12.7 Her X-1
299.4219 35.2151 3.5 37.2 39.9 0.2059 3.3 8.3 Cyg X-1
308.3002 40.9345 7.5 39.6 25.9 -0.0925 -1.5 8.7 Cyg X-3
326.2380 38.2814 8.8 52.4 17.7 -0.1973 -1.3 3.9 Cyg X-2
244.4540 3.1140 2.2 47.2 135.3 0.7754 5.2 ------ UNKNOWN
234.3331 6.3573 2.4 45.9 149.8 0.4271 4.8 ------ UNKNOWN
328.1057 40.4909 2.3 52.2 14.4 0.6045 5.0 ------ UNKNOWN
328.8664 40.9995 1.8 52.3 13.4 0.7643 6.5 ------ UNKNOWN
281.1414 59.6227 0.5 19.3 -6.4 0.7236 24.0 ------ UNKNOWN
198.1105 15.3003 2.5 55.3 -163.7 0.4485 4.7 ------ UNKNOWN
189.4874 20.6794 2.2 56.7 -152.0 0.8825 5.3 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
57.124600 962.645500
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.3366 35.4438 6.8 29.8 149.0 1.4877 1.7 8.5 Her X-1
299.6127 35.2094 0.6 27.2 66.8 16.0016 19.4 1.2 Cyg X-1
308.0687 40.9946 1.7 25.0 47.4 5.1274 6.9 3.1 Cyg X-3
326.0561 38.4576 6.4 35.2 27.8 1.6134 1.8 9.8 Cyg X-2
246.4775 36.4639 2.4 32.1 160.7 4.1978 4.7 ------ UNKNOWN
354.3413 37.9714 2.7 49.8 2.7 6.0248 4.3 ------ UNKNOWN
2.1146 34.1192 2.8 56.7 -0.5 11.2084 4.2 ------ UNKNOWN
353.1772 48.8426 3.0 41.2 -6.9 3.4563 3.8 ------ UNKNOWN
18.3603 40.2213 3.9 59.4 -17.1 13.6595 3.0 ------ UNKNOWN
200.6303 31.2551 4.7 58.7 -159.2 13.5458 2.5 ------ UNKNOWN
55.0507 71.6849 3.0 44.9 -60.0 12.0660 3.8 ------ UNKNOWN
Plot creation:
Sat May 30 12:55:59 EDT 2015