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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
336.9591 64.6469 0.0186 33.1457 123.0414 2.8525559 10.302 TRIG_00657321
Foreground time interval of the image:
-39.960 72.901 (delta_t = 112.861 [sec])
Background time interval of the image:
-239.000 -39.960 (delta_t = 199.040 [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 -39.960 sec. to 118.680 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.12502 ( -0.243778 0.264833 )
Norm@50keV : 1.06618E-03 ( -0.000190331 0.00018441 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.89 using 59 PHA bins.
# Reduced chi-squared = 0.7700 for 57 degrees of freedom
# Null hypothesis probability = 8.985070e-01
Photon flux (15-150 keV) in 158.6 sec: 0.169840 ( -0.0211987 0.0211991 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.57512e-06 ( -2.44355e-07 2.51911e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -39.960 sec. to 118.680 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.97326 ( )
Epeak [keV] : 7.21958 ( )
Norm@50keV : 1.30974E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.87 using 59 PHA bins.
# Reduced chi-squared = 0.7834 for 56 degrees of freedom
# Null hypothesis probability = 8.804081e-01
Photon flux (15-150 keV) in 158.6 sec: 0.169237 ( -0.021812 0.02162 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.558e-06 ( -2.8535e-07 2.65787e-07 ) ergs/cm2
Band function
Time interval is from -39.960 sec. to 118.680 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.90728 ( -4.90728 -4.90728 )
beta : -2.19774 ( -0.353668 0.272444 )
Epeak [keV] : 19.2895 ( -19.2895 4.6256 )
Norm@50keV : 915.558 ( -114.078 1.99001e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.37 using 59 PHA bins.
# Reduced chi-squared = 0.7886 for 55 degrees of freedom
# Null hypothesis probability = 8.714448e-01
Photon flux (15-150 keV) in 158.6 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] : 8.59047 (-1.29323 1.52146)
R^2/D10^2 : 0.138037 (-0.0649951 0.12498)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.60 using 59 PHA bins.
# Reduced chi-squared = 1.046 for 57 degrees of freedom
# Null hypothesis probability = 3.811242e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.065e-07 7.129e-08
25- 50 6.047e-07 1.236e-07
50-150 1.996e-07 7.790e-08
15-150 1.111e-06 2.156e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 53.1506 (-16.8059 30.3396)
Norm : 0.928264 (-0.190028 0.264347)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.15 using 59 PHA bins.
# Reduced chi-squared = 0.7921 for 57 degrees of freedom
# Null hypothesis probability = 8.716685e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.648e-07 5.607e-08
25- 50 5.351e-07 7.986e-08
50-150 5.497e-07 2.016e-07
15-150 1.450e-06 2.791e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.19970 (-1.94334 2.17508)
R1^2/D10^2 : 0.765129 (-0.537172 4.43961)
kT2 [keV] : 19.0787 (-7.58186 28.3797)
R2^2/D10^2 : 4.27428E-03 (-0.00388736 0.0291657)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.85 using 59 PHA bins.
# Reduced chi-squared = 0.8155 for 55 degrees of freedom
# Null hypothesis probability = 8.338550e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.927e-07 2.181e-07
25- 50 4.810e-07 2.276e-07
50-150 6.376e-07 3.742e-07
15-150 1.511e-06 7.160e-07
Peak spectrum fit
Power-law model
Time interval is from 47.468 sec. to 48.468 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.33886 ( -1.5569 0.842965 )
Norm@50keV : 8.76267E-05 ( -8.75513e-05 0.000412328 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.89 using 59 PHA bins.
# Reduced chi-squared = 0.9455 for 57 degrees of freedom
# Null hypothesis probability = 5.923449e-01
Photon flux (15-150 keV) in 1 sec: 0.535537 ( -0.280634 0.276301 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.18635e-08 ( -2.19646e-08 2.19478e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 47.468 sec. to 48.468 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.964034 ( -1.61153 0.80612 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 4.75573E-03 ( -0.00474852 0.0201835 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.30 using 59 PHA bins.
# Reduced chi-squared = 0.9696 for 56 degrees of freedom
# Null hypothesis probability = 5.394582e-01
Photon flux (15-150 keV) in 1 sec: 0.552676 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 5.16163e-08 ( -2.17668e-08 2.16042e-08 ) ergs/cm2
Band function
Time interval is from 47.468 sec. to 48.468 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99315 ( -4.99315 -4.99315 )
beta : -1.00281 ( -1.24275 1.54416 )
Epeak [keV] : 27.6508 ( -27.6508 54.1441 )
Norm@50keV : 170.534 ( -70.9009 2.90941e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.13 using 59 PHA bins.
# Reduced chi-squared = 0.9842 for 55 degrees of freedom
# Null hypothesis probability = 5.079016e-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] : 48.0359 (-36.6987 -48.6177)
R^2/D10^2 : 1.96891E-03 (-0.00188113 0.140535)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.87 using 59 PHA bins.
# Reduced chi-squared = 0.9976 for 57 degrees of freedom
# Null hypothesis probability = 4.800970e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.115e-10 3.292e-10
25- 50 3.663e-09 2.378e-09
50-150 4.301e-08 2.545e-08
15-150 4.718e-08 2.930e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.352 (-199.362 -199.362)
Norm : 2.40870 (-1.07551 1.07537)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.18 using 59 PHA bins.
# Reduced chi-squared = 0.9856 for 57 degrees of freedom
# Null hypothesis probability = 5.058315e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.998e-09 4.155e-09
25- 50 1.154e-08 7.160e-09
50-150 2.530e-08 1.656e-08
15-150 4.284e-08 2.826e-08
Double BB
R1^2/D10^2 : 0.352536 (-0.333707 0.760448)
kT2 [keV] : 199.363 (-199.363 -199.363)
R2^2/D10^2 : 1.33780E-04 (-7.22529e-05 0.00475618)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.33 using 59 PHA bins.
#Fit statistic : Chi-Squared = 52.03 using 59 PHA bins.
#Fit statistic : Chi-Squared = 52.01 using 59 PHA bins.
# Reduced chi-squared = 0.9514 for 55 degrees of freedom
# Reduced chi-squared = 0.9460 for 55 degrees of freedom
# Reduced chi-squared = 0.9456 for 55 degrees of freedom
# Null hypothesis probability = 5.773761e-01
# Null hypothesis probability = 5.889132e-01
# Null hypothesis probability = 5.895802e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.565e-09 3.222e-09
25- 50 1.108e-08 7.350e-09
50-150 4.008e-08 2.438e-08
15-150 5.572e-08 3.128e-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: 2.04760 ( -0.280766 0.308181 )
Norm@50keV : 1.16157E-03 ( -0.000238275 0.000229553 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.49 using 59 PHA bins.
# Reduced chi-squared = 0.7454 for 57 degrees of freedom
# Null hypothesis probability = 9.238890e-01
Photon flux (15-150 keV) in 112.9 sec: 0.178160 ( -0.0266891 0.02669 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.21301e-06 ( -2.23324e-07 2.30794e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.77910 ( -1.44024 0.33839 )
Epeak [keV] : 33.4766 ( )
Norm@50keV : 1.67468E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.32 using 59 PHA bins.
# Reduced chi-squared = 0.7556 for 56 degrees of freedom
# Null hypothesis probability = 9.118350e-01
Photon flux (15-150 keV) in 112.9 sec: 0.176543 ( -0.027498 0.02739 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.17801e-06 ( -2.58675e-07 2.57717e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.43985 ( 1.42608 1.42608 )
beta : -2.26674 ( 2.27468 0.488777 )
Epeak [keV] : 32.8376 ( -32.8071 260.92 )
Norm@50keV : 2.80405E-03 ( -0.00291346 516.405 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.13 using 59 PHA bins.
# Reduced chi-squared = 0.7660 for 55 degrees of freedom
# Null hypothesis probability = 8.985505e-01
Photon flux (15-150 keV) in 112.9 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) = 4.90e-07
S(50-100 keV) = 4.50e-07
T90 vs. Hardness ratio plot
T90 = 131.520000040531 sec.
Hardness ratio (energy fluence ratio) = 0.918367
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.891228
Count Ratio (50-100 keV) / (15-25 keV) = 0.380739
Mask shadow pattern
IMX = -3.560606092275742E-01, IMY = -5.474196051367878E-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:
-239.000000 -39.960000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
20.3534 52.3327 2.7 39.6 81.4 3.5403 4.2 ------ UNKNOWN
266.6368 56.7551 2.4 41.8 177.7 1.4041 4.8 ------ UNKNOWN
169.3313 77.8035 2.8 10.0 -128.7 0.7058 4.2 ------ UNKNOWN
241.6932 64.9784 2.9 31.5 -165.0 0.8258 4.0 ------ UNKNOWN
228.2063 38.8312 4.1 55.3 -144.7 2.9854 2.8 ------ UNKNOWN
217.4469 41.6187 2.5 50.9 -135.4 4.2834 4.6 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-39.960000 72.900610
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
336.9588 64.6476 1.1 33.1 123.0 2.8541 10.3 ------ UNKNOWN
123.7495 44.3292 1.9 36.2 -35.4 1.0883 6.0 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
127.700600 963.080000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
299.6277 35.1890 2.6 36.9 179.7 3.3893 4.4 2.0 Cyg X-1
308.0605 40.9618 1.2 28.9 173.2 6.0445 9.9 2.3 Cyg X-3
325.9415 38.2979 45.1 27.2 143.4 -0.1781 -0.3 10.9 Cyg X-2
35.6581 58.6416 2.8 27.5 19.1 2.3197 4.1 ------ UNKNOWN
73.1676 57.6941 5.1 42.4 -3.6 1.8915 2.3 ------ UNKNOWN
98.3938 49.1681 2.4 57.5 -14.2 12.3488 4.7 ------ UNKNOWN
268.5579 36.8967 3.1 48.0 -146.4 5.1624 3.7 ------ UNKNOWN
111.6378 51.2168 3.7 58.9 -24.3 13.7084 3.1 ------ UNKNOWN
262.8606 31.1439 5.0 55.3 -145.1 8.2597 2.3 ------ UNKNOWN
250.1128 49.4503 4.1 45.3 -121.4 6.8309 2.8 ------ UNKNOWN
Plot creation:
Sun Nov 1 14:37:12 EST 2015