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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
140.0156 68.4363 0.0082 42.4481 -137.4803 3.5595986 23.324 TRIG_00642620
Foreground time interval of the image:
-0.232 27.900 (delta_t = 28.132 [sec])
Background time interval of the image:
-274.363 -254.674 (delta_t = 19.689 [sec])
-239.264 -0.232 (delta_t = 239.032 [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 -0.232 sec. to 27.900 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.59023 ( -0.0955718 0.096134 )
Norm@50keV : 9.05656E-03 ( -0.000522785 0.000521753 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.00 using 59 PHA bins.
# Reduced chi-squared = 0.8773 for 57 degrees of freedom
# Null hypothesis probability = 7.326653e-01
Photon flux (15-150 keV) in 28.13 sec: 1.16032 ( -0.0686845 0.0688119 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.38544e-06 ( -1.45729e-07 1.46217e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.232 sec. to 27.900 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.975245 ( -0.428414 0.38916 )
Epeak [keV] : 84.1672 ( -16.7024 57.0308 )
Norm@50keV : 1.84289E-02 ( -0.00654129 0.0114692 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.33 using 59 PHA bins.
# Reduced chi-squared = 0.7559 for 56 degrees of freedom
# Null hypothesis probability = 9.115238e-01
Photon flux (15-150 keV) in 28.13 sec: 1.12971 ( -0.07114 0.07125 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.29803e-06 ( -1.57818e-07 1.57272e-07 ) ergs/cm2
Band function
Time interval is from -0.232 sec. to 27.900 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.975000 ( -0.365001 0.425368 )
beta : -10.0000 ( 10 20 )
Epeak [keV] : 84.1440 ( -13.2276 57.0297 )
Norm@50keV : 1.84321E-02 ( -0.00654306 0.0114758 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.33 using 59 PHA bins.
# Reduced chi-squared = 0.7697 for 55 degrees of freedom
# Null hypothesis probability = 8.944459e-01
Photon flux (15-150 keV) in 28.13 sec: 1.12983 ( 5.87017 -0.0711 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.31395e-06 ( -2.31376e-06 -1.5056e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 14.4583 (-0.992932 1.0755)
R^2/D10^2 : 0.148362 (-0.0341035 0.0437695)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 99.70 using 59 PHA bins.
# Reduced chi-squared = 1.749 for 57 degrees of freedom
# Null hypothesis probability = 4.040668e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.836e-07 2.118e-08
25- 50 7.048e-07 4.923e-08
50-150 9.858e-07 1.129e-07
15-150 1.874e-06 1.269e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 178.114 (-43.0483 -177.861)
Norm : 4.76072 (-0.296721 0.323979)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.71 using 59 PHA bins.
# Reduced chi-squared = 0.7668 for 57 degrees of freedom
# Null hypothesis probability = 9.020754e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.381e-07 2.827e-08
25- 50 6.416e-07 1.082e-07
50-150 1.353e-06 4.436e-07
15-150 2.333e-06 5.928e-07
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.96155 ( )
R1^2/D10^2 : 0.812636 (-0.320617 0.620975)
kT2 [keV] : 26.9352 (-4.85284 8.22396)
R2^2/D10^2 : 1.14925E-02 (-0.00710876 0.0133976)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.47 using 59 PHA bins.
#Fit statistic : Chi-Squared = 38.44 using 59 PHA bins.
# Reduced chi-squared = 0.7722 for 55 degrees of freedom
# Reduced chi-squared = 0.6989 for 55 degrees of freedom
# Null hypothesis probability = 8.915229e-01
# Null hypothesis probability = 9.561185e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.963e-07 1.454e-07
25- 50 6.369e-07 2.617e-07
50-150 1.212e-06 6.186e-07
15-150 2.145e-06 8.096e-07
Peak spectrum fit
Power-law model
Time interval is from 7.288 sec. to 8.288 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.44633 ( -0.136986 0.137383 )
Norm@50keV : 3.97561E-02 ( -0.00357117 0.0035674 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.50 using 59 PHA bins.
# Reduced chi-squared = 1.184 for 57 degrees of freedom
# Null hypothesis probability = 1.610714e-01
Photon flux (15-150 keV) in 1 sec: 4.89492 ( -0.449533 0.450133 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.807e-07 ( -3.65686e-08 3.67007e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 7.288 sec. to 8.288 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.605638 ( -0.649325 0.557662 )
Epeak [keV] : 85.1894 ( -18.7547 65.9585 )
Norm@50keV : 0.105175 ( -0.0490848 0.114137 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.40 using 59 PHA bins.
# Reduced chi-squared = 1.078 for 56 degrees of freedom
# Null hypothesis probability = 3.200449e-01
Photon flux (15-150 keV) in 1 sec: 4.81334 ( -0.45353 0.45397 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.68276e-07 ( -3.8873e-08 3.8599e-08 ) ergs/cm2
Band function
Time interval is from 7.288 sec. to 8.288 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.17234 ( -0.533974 0.449942 )
beta : -1.69895 ( 9.37163 19.3716 )
Epeak [keV] : 31.7587 ( -15.5685 62.3371 )
Norm@50keV : 294.305 ( -294.245 180.338 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.02 using 59 PHA bins.
# Reduced chi-squared = 1.037 for 55 degrees of freedom
# Null hypothesis probability = 3.997918e-01
Photon flux (15-150 keV) in 1 sec: 4.81287 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.72451e-07 ( -3.72444e-07 -3.7213e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 15.3879 (-1.62231 1.84566)
R^2/D10^2 : 0.540595 (-0.178368 0.259498)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 80.45 using 59 PHA bins.
# Reduced chi-squared = 1.411 for 57 degrees of freedom
# Null hypothesis probability = 2.209145e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.668e-08 4.845e-09
25- 50 1.085e-07 1.379e-08
50-150 1.768e-07 3.160e-08
15-150 3.120e-07 3.645e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 20.3684 (-1.81794 1.81794)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.98 using 59 PHA bins.
# Reduced chi-squared = 1.140 for 57 degrees of freedom
# Null hypothesis probability = 2.186724e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.094e-08 5.780e-09
25- 50 9.799e-08 1.605e-08
50-150 2.149e-07 9.306e-08
15-150 3.639e-07 9.890e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.13816 (-2.15761 1.24079)
R1^2/D10^2 : 2.18417 (-1.05451 2.60515)
kT2 [keV] : 30.5049 (-8.23519 22.9819)
R2^2/D10^2 : 3.33870E-02 (-0.0280689 0.0798782)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.70 using 59 PHA bins.
# Reduced chi-squared = 1.031 for 55 degrees of freedom
# Null hypothesis probability = 4.113964e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.060e-08 1.566e-08
25- 50 1.078e-07 3.883e-08
50-150 2.262e-07 1.063e-07
15-150 3.745e-07 1.430e-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: 1.59023 ( -0.0955718 0.096134 )
Norm@50keV : 9.05656E-03 ( -0.000522785 0.000521753 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.00 using 59 PHA bins.
# Reduced chi-squared = 0.8773 for 57 degrees of freedom
# Null hypothesis probability = 7.326653e-01
Photon flux (15-150 keV) in 28.13 sec: 1.16032 ( -0.0686845 0.0688119 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.38544e-06 ( -1.45729e-07 1.46217e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.975245 ( -0.428414 0.38916 )
Epeak [keV] : 84.1672 ( -16.7024 57.0308 )
Norm@50keV : 1.84289E-02 ( -0.00654129 0.0114692 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.33 using 59 PHA bins.
# Reduced chi-squared = 0.7559 for 56 degrees of freedom
# Null hypothesis probability = 9.115238e-01
Photon flux (15-150 keV) in 28.13 sec: 1.12971 ( -0.07114 0.07125 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.29803e-06 ( -1.57818e-07 1.57272e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.975000 ( -0.365001 0.425368 )
beta : -10.0000 ( 10 1.77636e-15 )
Epeak [keV] : 84.1440 ( -13.2276 57.0297 )
Norm@50keV : 1.84321E-02 ( -0.00654306 0.0114758 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.33 using 59 PHA bins.
# Reduced chi-squared = 0.7697 for 55 degrees of freedom
# Null hypothesis probability = 8.944459e-01
Photon flux (15-150 keV) in 28.13 sec: 1.12983 ( 5.87017 -0.0711 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.31395e-06 ( -2.31376e-06 -1.5056e-07 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 6.16e-07
S(50-100 keV) = 8.18e-07
T90 vs. Hardness ratio plot
T90 = 25.9879999756813 sec.
Hardness ratio (energy fluence ratio) = 1.32792
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.69178
Count Ratio (50-100 keV) / (15-25 keV) = 1.2176
Mask shadow pattern
IMX = -6.741509474386460E-01, IMY = 6.181711465592979E-01
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:
-274.363400 -254.674000
-239.264000 -0.232000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
299.5678 35.1977 1.1 34.7 66.3 6.1962 10.5 1.1 Cyg X-1
308.0759 40.9659 2.8 28.2 54.8 1.4923 4.1 1.7 Cyg X-3
326.3020 38.3620 4.0 31.5 26.7 -0.8690 -2.9 6.6 Cyg X-2
354.9459 42.4073 3.2 34.1 -14.5 0.9026 3.6 ------ UNKNOWN
112.0931 64.7779 3.3 45.3 -121.3 3.6728 3.6 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-0.232000 27.900000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
299.5181 35.0764 4.1 34.9 66.3 0.4096 2.8 8.3 Cyg X-1
308.0987 41.0640 54.1 28.1 54.8 -0.0197 -0.2 6.7 Cyg X-3
325.9753 38.3001 12.6 31.5 27.2 -0.0875 -0.9 9.3 Cyg X-2
217.5797 52.9454 2.1 43.7 165.9 0.7165 5.4 ------ UNKNOWN
330.2000 42.3321 1.7 28.1 19.3 0.4893 6.8 ------ UNKNOWN
343.3502 46.0514 2.3 27.4 -2.5 0.3590 4.9 ------ UNKNOWN
133.6330 77.2013 2.6 33.8 -134.0 0.4321 4.4 ------ UNKNOWN
140.0156 68.4363 0.5 42.4 -137.5 3.5593 23.3 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
117.436610 962.871300
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
168.8504 71.0678 3.2 10.2 77.1 1.7400 3.6 ------ UNKNOWN
159.5897 37.2710 3.0 33.0 165.8 2.8450 3.9 ------ UNKNOWN
124.4548 23.2925 3.2 46.2 -144.9 4.3825 3.6 ------ UNKNOWN
13.8520 45.9745 3.4 58.8 -25.9 11.1596 3.4 ------ UNKNOWN
71.5320 45.1270 3.3 41.1 -73.2 7.1524 3.5 ------ UNKNOWN
Plot creation:
Fri Jun 26 00:51:30 EDT 2015