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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
311.4158 49.8294 0.0205 9.9963 -74.3773 0.8287199 9.304 TRIG_00544784
Foreground time interval of the image:
15.376 73.501 (delta_t = 58.125 [sec])
Background time interval of the image:
-79.499 15.376 (delta_t = 94.875 [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 15.376 sec. to 184.332 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.54628 ( -0.217475 0.224206 )
Norm@50keV : 5.26418E-04 ( -7.20957e-05 7.11868e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.94 using 59 PHA bins.
# Reduced chi-squared = 0.9463 for 57 degrees of freedom
# Null hypothesis probability = 5.905744e-01
Photon flux (15-150 keV) in 169 sec: 6.65699E-02 ( -0.00852684 0.00853247 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.37968e-07 ( -1.24416e-07 1.26766e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 15.376 sec. to 184.332 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.519629 ( -1.16587 0.912865 )
Epeak [keV] : 71.9962 ( -17.2518 144.857 )
Norm@50keV : 1.72842E-03 ( -0.0017283 0.00456877 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.17 using 59 PHA bins.
# Reduced chi-squared = 0.8958 for 56 degrees of freedom
# Null hypothesis probability = 6.943216e-01
Photon flux (15-150 keV) in 169 sec: 6.36597E-02 ( -0.0089726 0.0089336 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.83574e-07 ( -1.2829e-07 1.34105e-07 ) ergs/cm2
Band function
Time interval is from 15.376 sec. to 184.332 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.518912 ( -0.535878 1.6052 )
beta : -10.0000 ( 10 20 )
Epeak [keV] : 71.9180 ( -17.1609 145.174 )
Norm@50keV : 1.73104E-03 ( -0.00173103 0.00456742 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.17 using 59 PHA bins.
# Reduced chi-squared = 0.9121 for 55 degrees of freedom
# Null hypothesis probability = 6.595005e-01
Photon flux (15-150 keV) in 169 sec: 6.46980E-02 ( 6.9353 -0.0047737 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.29246e-07 ( -8.28063e-07 -1.90671e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 15.0861 (-2.05808 2.41709)
R^2/D10^2 : 7.57482E-03 (-0.0030764 0.00507488)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.40 using 59 PHA bins.
# Reduced chi-squared = 0.9894 for 57 degrees of freedom
# Null hypothesis probability = 4.977036e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.094e-08 1.516e-08
25- 50 2.434e-07 4.276e-08
50-150 3.780e-07 9.979e-08
15-150 6.823e-07 1.150e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 188.195 (-83.9332 -186.639)
Norm : 0.273428 (-0.0352037 0.0395677)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.97 using 59 PHA bins.
# Reduced chi-squared = 0.9117 for 57 degrees of freedom
# Null hypothesis probability = 6.638039e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.159e-07 6.443e-08
25- 50 2.214e-07 1.201e-07
50-150 4.763e-07 2.630e-07
15-150 8.137e-07 4.438e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.99414 (-1.19901 2.08712)
R1^2/D10^2 : 2.08231 (-1.93492 61.4364)
kT2 [keV] : 17.3047 (-2.65223 3.49798)
R2^2/D10^2 : 4.38874E-03 (-0.00214475 0.00430062)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.30 using 59 PHA bins.
# Reduced chi-squared = 0.8237 for 55 degrees of freedom
# Null hypothesis probability = 8.214024e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.100e-07 4.857e-08
25- 50 2.114e-07 6.491e-08
50-150 4.342e-07 1.417e-07
15-150 7.556e-07 1.990e-07
Peak spectrum fit
Power-law model
Time interval is from 23.532 sec. to 24.532 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.64619 ( -0.464745 0.502543 )
Norm@50keV : 3.06538E-03 ( -0.000980399 0.000943984 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.97 using 59 PHA bins.
# Reduced chi-squared = 0.9118 for 57 degrees of freedom
# Null hypothesis probability = 6.635907e-01
Photon flux (15-150 keV) in 1 sec: 0.399762 ( -0.109137 0.109137 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.85186e-08 ( -9.33507e-09 9.88986e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 23.532 sec. to 24.532 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -3.95142E-02 ( -4.66358 2.24361 )
Epeak [keV] : 48.9274 ( )
Norm@50keV : 2.97119E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.83 using 59 PHA bins.
# Reduced chi-squared = 0.9076 for 56 degrees of freedom
# Null hypothesis probability = 6.704588e-01
Photon flux (15-150 keV) in 1 sec: 0.374652 ( -0.111683 0.116194 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.32852e-08 ( -8.4702e-09 1.26801e-08 ) ergs/cm2
Band function
Time interval is from 23.532 sec. to 24.532 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.85400 ( -2.97616 -2.97616 )
beta : -2.31025 ( 2.2652 0.922866 )
Epeak [keV] : 37.4596 ( -34.7364 164.656 )
Norm@50keV : 0.519597 ( -0.512103 53.1313 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.48 using 59 PHA bins.
# Reduced chi-squared = 0.9179 for 55 degrees of freedom
# Null hypothesis probability = 6.476821e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.47172e-08 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 11.2809 (-2.80711 3.97477)
R^2/D10^2 : 0.128021 (-0.0859841 0.233675)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.24 using 59 PHA bins.
# Reduced chi-squared = 0.8990 for 57 degrees of freedom
# Null hypothesis probability = 6.898258e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.420e-09 1.808e-09
25- 50 9.984e-09 5.456e-09
50-150 7.315e-09 4.916e-09
15-150 2.072e-08 1.171e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 121.967 (-76.1124 -121.436)
Norm : 1.71356 (-0.503345 0.779524)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.44 using 59 PHA bins.
# Reduced chi-squared = 0.9024 for 57 degrees of freedom
# Null hypothesis probability = 6.830288e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.460e-09 2.677e-09
25- 50 8.002e-09 4.578e-09
50-150 1.439e-08 1.031e-08
15-150 2.686e-08 1.758e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 10.0968 (-10.0947 4.04748)
R1^2/D10^2 : 0.177433 (-0.177948 1.7624)
kT2 [keV] : 198.401 (-198.722 -198.722)
R2^2/D10^2 : 3.03061E-05 (-3.18454e-05 -3.18454e-05)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.07 using 59 PHA bins.
# Reduced chi-squared = 0.9104 for 55 degrees of freedom
# Null hypothesis probability = 6.629550e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.734e-09 2.262e-09
25- 50 9.642e-09 6.095e-09
50-150 1.297e-08 4.464e-09
15-150 2.635e-08 1.280e-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: 1.33496 ( -0.194827 0.194505 )
Norm@50keV : 9.77688E-04 ( -0.000119348 0.000119058 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.06 using 59 PHA bins.
# Reduced chi-squared = 0.8606 for 57 degrees of freedom
# Null hypothesis probability = 7.637894e-01
Photon flux (15-150 keV) in 58.12 sec: 0.117427 ( -0.0142784 0.014295 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.56857e-07 ( -7.53869e-08 7.64819e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.418844 ( -1.35329 1.02107 )
Epeak [keV] : 67.7752 ( -11.8036 28.9733 )
Norm@50keV : 7.52089E-03 ( -0.00752088 0.0267566 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.92 using 59 PHA bins.
# Reduced chi-squared = 0.6949 for 56 degrees of freedom
# Null hypothesis probability = 9.600286e-01
Photon flux (15-150 keV) in 58.12 sec: 0.109415 ( -0.0149988 0.015006 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.87258e-07 ( -7.8895e-08 8.39683e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.425087 ( -1.00822 1.04526 )
beta : -9.37167 ( 9.37167 19.3717 )
Epeak [keV] : 68.1254 ( -10.4797 28.3963 )
Norm@50keV : 7.50101E-03 ( -0.00747971 0.0921194 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.92 using 59 PHA bins.
# Reduced chi-squared = 0.7076 for 55 degrees of freedom
# Null hypothesis probability = 9.504734e-01
Photon flux (15-150 keV) in 58.12 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 4.88217e-07 ( 0 0 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 2.12e-07
S(50-100 keV) = 2.90e-07
T90 vs. Hardness ratio plot
T90 = 132.77999997139 sec.
Hardness ratio (energy fluence ratio) = 1.36792
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.21474
Count Ratio (50-100 keV) / (15-25 keV) = 1.1381
Mask shadow pattern
IMX = 4.746703492567145E-02, IMY = 1.697480824723668E-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:
-79.499410 15.376000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.3043 35.2955 5.8 50.8 -35.9 0.6389 2.0 8.0 Her X-1
299.5096 35.2196 3.2 26.8 -82.8 0.4543 3.6 4.1 Cyg X-1
308.0299 41.0014 1.9 18.4 -89.8 0.6610 6.2 4.7 Cyg X-3
326.3548 38.3878 4.4 17.5 -137.5 0.2346 2.6 9.5 Cyg X-2
142.2661 78.0048 2.5 46.2 47.5 2.0893 4.7 ------ UNKNOWN
178.9958 73.9547 2.9 48.2 34.7 1.5363 4.0 ------ UNKNOWN
318.4352 54.7423 3.1 3.7 -57.1 0.3455 3.7 ------ UNKNOWN
341.9291 12.7988 2.6 45.0 -157.3 0.7859 4.5 ------ UNKNOWN
344.0895 0.4311 2.4 57.6 -156.4 2.7496 4.8 ------ UNKNOWN
260.3541 30.9959 2.4 50.6 -44.5 2.2444 4.7 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
15.376000 73.500600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.5630 35.4565 6.7 50.6 -36.0 0.4980 1.7 8.6 Her X-1
299.4786 35.3268 6.9 26.7 -82.6 -0.1946 -1.7 9.3 Cyg X-1
308.0140 41.1094 9.2 18.3 -89.6 -0.1163 -1.3 10.4 Cyg X-3
326.0911 38.4653 6.6 17.4 -136.8 0.1529 1.7 9.4 Cyg X-2
311.4158 49.8294 1.2 10.0 -74.4 0.8285 9.3 ------ UNKNOWN
240.8598 38.5768 2.3 55.8 -23.3 1.6983 5.0 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
105.300600 963.079200
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.4578 35.3319 2.5 43.2 -23.3 3.2669 4.5 0.6 Her X-1
299.5410 35.1970 2.2 17.0 -80.9 2.4353 5.2 2.4 Cyg X-1
308.1023 40.9473 0.8 9.2 -100.0 6.0987 13.6 0.5 Cyg X-3
326.1299 38.3888 5.3 15.5 -164.0 0.9051 2.2 4.5 Cyg X-2
298.6654 61.5493 2.8 13.7 37.5 1.6835 4.1 ------ UNKNOWN
328.6771 41.8492 2.8 14.4 -178.8 1.8157 4.2 ------ UNKNOWN
231.4250 41.9083 2.8 53.6 -1.7 5.4810 4.1 ------ UNKNOWN
346.3159 7.7586 2.5 51.1 -162.7 5.0441 4.6 ------ UNKNOWN
260.4367 19.0465 3.6 50.7 -44.4 7.8922 3.2 ------ UNKNOWN
288.6512 13.2387 2.6 41.1 -81.0 8.6273 4.4 ------ UNKNOWN
Plot creation:
Sat May 30 17:34:25 EDT 2015