Estimated redshift from machine learning (Ukwatta et al. 2016) - may take a few minute to calcaulte
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
95.9715 12.8063 0.0151 33.5944 155.9414 3.1846240 12.747 TRIG_00824063
Foreground time interval of the image:
20.712 105.301 (delta_t = 84.589 [sec])
Background time interval of the image:
-15.899 20.712 (delta_t = 36.611 [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
8 ms binning
From T100_start-3 s to T100_start+3 s
2 ms binning
From T100_start-1 s to T100_start+1 s
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 20.712 sec. to 154.752 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.39874 ( -0.125062 0.124602 )
Norm@50keV : 1.84512E-03 ( -0.000132125 0.000132033 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.11 using 59 PHA bins.
# Reduced chi-squared = 0.8791 for 57 degrees of freedom
# Null hypothesis probability = 7.292438e-01
Photon flux (15-150 keV) in 134 sec: 0.224641 ( -0.016822 0.016862 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.38998e-06 ( -1.85105e-07 1.8607e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 20.712 sec. to 154.752 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.942267 ( -0.580261 0.497272 )
Epeak [keV] : 122.827 ( -41.5261 -122.826 )
Norm@50keV : 3.05502E-03 ( -0.00125559 0.00261085 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.81 using 59 PHA bins.
# Reduced chi-squared = 0.8537 for 56 degrees of freedom
# Null hypothesis probability = 7.738346e-01
Photon flux (15-150 keV) in 134 sec: 0.219688 ( -0.017819 0.017746 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.32308e-06 ( -2.01911e-07 2.0136e-07 ) ergs/cm2
Band function
Time interval is from 20.712 sec. to 154.752 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.875982 ( 0.875731 0.740963 )
beta : -1.81394 ( 1.8156 0.452709 )
Epeak [keV] : 110.533 ( -110.323 -110.323 )
Norm@50keV : 3.32008E-03 ( -0.00137829 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.59 using 59 PHA bins.
# Reduced chi-squared = 0.8654 for 55 degrees of freedom
# Null hypothesis probability = 7.505204e-01
Photon flux (15-150 keV) in 134 sec: 0.219366 ( -0.018042 0.017635 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.35899e-06 ( -1.80955e-07 1.67891e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 17.0094 (-1.42087 1.59337)
R^2/D10^2 : 1.69256E-02 (-0.00454729 0.00604559)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 77.74 using 59 PHA bins.
# Reduced chi-squared = 1.364 for 57 degrees of freedom
# Null hypothesis probability = 3.533214e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.336e-07 2.013e-08
25- 50 5.915e-07 5.702e-08
50-150 1.222e-06 1.560e-07
15-150 1.947e-06 1.762e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-27.1367 -200)
Norm : 0.935018 (-0.0669293 0.0669293)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.01 using 59 PHA bins.
# Reduced chi-squared = 0.9300 for 57 degrees of freedom
# Null hypothesis probability = 6.254676e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.120e-07 2.646e-08
25- 50 6.001e-07 5.735e-08
50-150 1.316e-06 3.295e-07
15-150 2.228e-06 4.187e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.09543 (-1.41268 2.14734)
R1^2/D10^2 : 0.568504 (-0.412231 1.79496)
kT2 [keV] : 21.4876 (-2.70912 4.34733)
R2^2/D10^2 : 6.76465E-03 (-0.00338873 0.00435609)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.01 using 59 PHA bins.
# Reduced chi-squared = 0.8729 for 55 degrees of freedom
# Null hypothesis probability = 7.366360e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.780e-07 1.197e-07
25- 50 5.448e-07 1.369e-07
50-150 1.413e-06 2.403e-07
15-150 2.236e-06 3.873e-07
Peak spectrum fit
Power-law model
Time interval is from 25.704 sec. to 26.704 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.795291 ( -0.487892 0.422012 )
Norm@50keV : 6.29325E-03 ( -0.00181609 0.00174449 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.71 using 59 PHA bins.
# Reduced chi-squared = 1.223 for 57 degrees of freedom
# Null hypothesis probability = 1.204065e-01
Photon flux (15-150 keV) in 1 sec: 0.723419 ( -0.196311 0.199705 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.36953e-08 ( -1.91358e-08 1.92313e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 25.704 sec. to 26.704 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.288678 ( -3.29278 1.28263 )
Epeak [keV] : 126.197 ( -56.1118 -126.207 )
Norm@50keV : 1.81383E-02 ( -0.0181351 0.324032 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.79 using 59 PHA bins.
# Reduced chi-squared = 1.228 for 56 degrees of freedom
# Null hypothesis probability = 1.171652e-01
Photon flux (15-150 keV) in 1 sec: 0.698419 ( -0.20041 0.204387 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.07115e-08 ( -2.14248e-08 2.04098e-08 ) ergs/cm2
Band function
Time interval is from 25.704 sec. to 26.704 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.69570 ( -1.72888 -1.72888 )
beta : -1.29145 ( 1.29754 0.828756 )
Epeak [keV] : 72.4947 ( -71.6454 196.152 )
Norm@50keV : 0.101575 ( -0.114319 9.43913 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.17 using 59 PHA bins.
# Reduced chi-squared = 1.240 for 55 degrees of freedom
# Null hypothesis probability = 1.093187e-01
Photon flux (15-150 keV) in 1 sec: 0.682399 ( -0.1983 0.114574 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.20755e-09 ( -2.20755e-09 5.71199e-09 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 24.3185 (-6.65526 12.0594)
R^2/D10^2 : 2.04599E-02 (-0.0143454 0.0359657)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.38 using 59 PHA bins.
# Reduced chi-squared = 1.217 for 57 degrees of freedom
# Null hypothesis probability = 1.259254e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.132e-09 1.236e-09
25- 50 1.193e-08 5.543e-09
50-150 5.248e-08 2.780e-08
15-150 6.654e-08 3.859e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-66.8853 -200)
Norm : 2.99000 (-0.841361 0.841361)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 77.82 using 59 PHA bins.
# Reduced chi-squared = 1.365 for 57 degrees of freedom
# Null hypothesis probability = 3.483243e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.452e-09 4.549e-09
25- 50 1.434e-08 8.980e-09
50-150 3.144e-08 1.899e-08
15-150 5.323e-08 3.224e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 17.2024 (-6.25339 14.2423)
R1^2/D10^2 : 4.61932E-02 (-0.0359221 -0.0461581)
kT2 [keV] : 198.468 (-198.564 -198.564)
R2^2/D10^2 : 1.03247E-04 (-0.000104554 0.0422774)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.03 using 59 PHA bins.
# Reduced chi-squared = 1.237 for 55 degrees of freedom
# Null hypothesis probability = 1.114805e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.906e-09 1.880e-09
25- 50 1.351e-08 9.330e-09
50-150 5.346e-08 2.957e-08
15-150 6.987e-08 4.239e-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: 1.28133 ( -0.127914 0.126313 )
Norm@50keV : 2.44301E-03 ( -0.00017924 0.00017916 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.92 using 59 PHA bins.
# Reduced chi-squared = 1.051 for 57 degrees of freedom
# Null hypothesis probability = 3.703203e-01
Photon flux (15-150 keV) in 84.59 sec: 0.290479 ( -0.0225786 0.0226484 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.0516e-06 ( -1.60372e-07 1.60883e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.724676 ( -0.610384 0.530598 )
Epeak [keV] : 126.220 ( -39.3231 873.101 )
Norm@50keV : 4.41823E-03 ( -0.00187419 0.00382439 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.71 using 59 PHA bins.
# Reduced chi-squared = 1.013 for 56 degrees of freedom
# Null hypothesis probability = 4.483155e-01
Photon flux (15-150 keV) in 84.59 sec: 0.282770 ( -0.023857 0.023811 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.99227e-06 ( -1.73519e-07 1.72301e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.629053 ( -0.611684 3.4261 )
beta : -1.72623 ( 1.73015 0.446335 )
Epeak [keV] : 111.235 ( -85.1777 630.3 )
Norm@50keV : 4.97962E-03 ( -0.00227733 0.025859 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.57 using 59 PHA bins.
# Reduced chi-squared = 1.028 for 55 degrees of freedom
# Null hypothesis probability = 4.162745e-01
Photon flux (15-150 keV) in 84.59 sec: 0.282007 ( -0.024021 0.02395 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.02624e-06 ( -1.63852e-07 1.40865e-07 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 5.61e-07
S(50-100 keV) = 8.52e-07
T90 vs. Hardness ratio plot
T90 = 114.799999952316 sec.
Hardness ratio (energy fluence ratio) = 1.51872
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.44268
Count Ratio (50-100 keV) / (15-25 keV) = 1.41639
Mask shadow pattern
IMX = -6.065525978282925E-01, IMY = -2.707984011356575E-01
TIME vs. PHA plot around the trigger time
TIME vs. DetID plot around the trigger time
100 us light curve (15-350 keV)
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:
-15.899400 20.712000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
83.6444 22.0098 0.5 20.4 171.7 1.5136 22.0 0.7 Crab
75.6678 -7.2280 2.3 48.4 -166.1 0.7624 5.1 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
20.712000 105.300590
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
83.6520 22.1700 5.6 20.2 171.6 0.3545 2.1 9.4 Crab
158.6722 70.3595 2.0 49.5 40.4 4.6475 5.7 ------ UNKNOWN
95.9715 12.8063 0.9 33.6 155.9 3.1843 12.7 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
159.500610 963.090000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
83.6314 22.0156 0.2 14.9 -55.2 34.0387 50.5 0.1 Crab
110.3803 -39.6390 2.5 54.2 161.4 16.1500 4.5 ------ UNKNOWN
79.3575 -42.9600 2.8 57.8 -170.6 14.2879 4.1 ------ UNKNOWN
82.3868 64.0425 4.5 52.1 -12.4 3.9923 2.6 ------ UNKNOWN
67.2071 50.9094 3.1 44.7 -30.5 4.2165 3.8 ------ UNKNOWN
69.8407 -39.0271 2.3 57.3 -160.9 16.8344 5.1 ------ UNKNOWN
54.8982 21.3705 2.8 40.1 -76.9 9.6317 4.1 ------ UNKNOWN
55.6091 -5.0222 2.2 43.9 -116.4 13.6272 5.3 ------ UNKNOWN
Plot creation:
Sun May 13 07:52:04 EDT 2018