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
52.4817 -33.9907 0.0141 12.1987 48.4752 0.9111584 13.696 TRIG_00865179
Foreground time interval of the image:
-11.196 18.008 (delta_t = 29.204 [sec])
Background time interval of the image:
-239.928 -11.196 (delta_t = 228.732 [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 4.096000
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 4.096000
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 4.096000
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 -11.196 sec. to 18.008 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.55037 ( -0.191828 0.197043 )
Norm@50keV : 1.79729E-03 ( -0.000234263 0.000231611 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.61 using 59 PHA bins.
# Reduced chi-squared = 1.028 for 57 degrees of freedom
# Null hypothesis probability = 4.161632e-01
Photon flux (15-150 keV) in 29.2 sec: 0.227557 ( -0.026891 0.026892 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.94108e-07 ( -6.98079e-08 7.13925e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -11.196 sec. to 18.008 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.184135 ( -1.2386 0.970846 )
Epeak [keV] : 56.1921 ( -9.20013 19.1067 )
Norm@50keV : 1.60119E-02 ( -0.0160121 0.0590128 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.70 using 59 PHA bins.
# Reduced chi-squared = 0.8518 for 56 degrees of freedom
# Null hypothesis probability = 7.772946e-01
Photon flux (15-150 keV) in 29.2 sec: 0.214686 ( -0.027334 0.027481 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.24866e-07 ( -6.8281e-08 7.52986e-08 ) ergs/cm2
Band function
Time interval is from -11.196 sec. to 18.008 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : ( )
beta : ( )
Epeak [keV] : ( )
Norm@50keV : ( )
------------------------------------------------------------
Photon flux (15-150 keV) in 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] : 13.1021 (-1.56673 1.80952)
R^2/D10^2 : 4.36666E-02 (-0.0161212 0.0249301)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.70 using 59 PHA bins.
# Reduced chi-squared = 0.8894 for 57 degrees of freedom
# Null hypothesis probability = 7.090294e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.642e-08 1.002e-08
25- 50 1.612e-07 2.495e-08
50-150 1.758e-07 4.709e-08
15-150 3.834e-07 5.665e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 164.041 (-68.8917 -162.561)
Norm : 0.945725 (-0.114163 0.135266)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.44 using 59 PHA bins.
# Reduced chi-squared = 0.9551 for 57 degrees of freedom
# Null hypothesis probability = 5.717523e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.034e-08 3.854e-08
25- 50 1.320e-07 7.122e-08
50-150 2.701e-07 1.555e-07
15-150 4.725e-07 2.577e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.62027 (-2.75678 40.8835)
R1^2/D10^2 : 0.267497 (-0.248925 20.8167)
kT2 [keV] : 15.6851 (-3.09517 30.5438)
R2^2/D10^2 : 1.98903E-02 (-0.0197733 0.0288745)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.32 using 59 PHA bins.
# Reduced chi-squared = 0.8603 for 55 degrees of freedom
# Null hypothesis probability = 7.596442e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.933e-08 3.307e-08
25- 50 1.483e-07 7.804e-08
50-150 2.112e-07 1.203e-07
15-150 4.188e-07 2.193e-07
Peak spectrum fit
Power-law model
Time interval is from 1.864 sec. to 2.864 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.68100 ( -0.408398 0.454853 )
Norm@50keV : 4.44692E-03 ( -0.00131783 0.00126382 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.95 using 59 PHA bins.
# Reduced chi-squared = 0.7886 for 57 degrees of freedom
# Null hypothesis probability = 8.761726e-01
Photon flux (15-150 keV) in 1 sec: 0.586758 ( -0.143111 0.143155 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.12449e-08 ( -1.23966e-08 1.30901e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.864 sec. to 2.864 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.578199 ( -2.21404 1.55919 )
Epeak [keV] : 57.3271 ( -57.3387 -57.3387 )
Norm@50keV : 1.82387E-02 ( -0.0182256 0.295304 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.62 using 59 PHA bins.
# Reduced chi-squared = 0.7789 for 56 degrees of freedom
# Null hypothesis probability = 8.859190e-01
Photon flux (15-150 keV) in 1 sec: 0.569669 ( -0.142647 0.144377 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.76929e-08 ( -1.20085e-08 1.38406e-08 ) ergs/cm2
Band function
Time interval is from 1.864 sec. to 2.864 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : ( )
beta : ( )
Epeak [keV] : ( )
Norm@50keV : ( )
------------------------------------------------------------
Photon flux (15-150 keV) in 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] : 12.5999 (-3.54215 4.4693)
R^2/D10^2 : 0.125985 (-0.0829927 0.276651)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.11 using 59 PHA bins.
# Reduced chi-squared = 0.8089 for 57 degrees of freedom
# Null hypothesis probability = 8.484796e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.241e-09 2.265e-09
25- 50 1.411e-08 7.153e-09
50-150 1.390e-08 7.861e-09
15-150 3.226e-08 1.484e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 121.465 (-69.9266 -119.492)
Norm : 2.50615 (-0.660233 0.95754)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.10 using 59 PHA bins.
# Reduced chi-squared = 0.7738 for 57 degrees of freedom
# Null hypothesis probability = 8.942511e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.524e-09 3.770e-09
25- 50 1.170e-08 6.605e-09
50-150 2.100e-08 1.450e-08
15-150 3.922e-08 2.475e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.45452 (-5.29128 23.2717)
R1^2/D10^2 : 1.32012 (-1.24761 -1.32193)
kT2 [keV] : 17.8156 (-11.8564 23.6669)
R2^2/D10^2 : 2.89745E-02 (-0.0282259 0.0788248)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.90 using 59 PHA bins.
# Reduced chi-squared = 0.7801 for 55 degrees of freedom
# Null hypothesis probability = 8.821630e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.338e-09 3.570e-09
25- 50 1.209e-08 6.485e-09
50-150 1.970e-08 1.204e-08
15-150 3.813e-08 2.076e-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: 1.55037 ( -0.191828 0.197043 )
Norm@50keV : 1.79729E-03 ( -0.000234263 0.000231611 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.61 using 59 PHA bins.
# Reduced chi-squared = 1.028 for 57 degrees of freedom
# Null hypothesis probability = 4.161632e-01
Photon flux (15-150 keV) in 29.2 sec: 0.227550 ( -0.02689 0.0268912 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.94046e-07 ( -6.97626e-08 7.14273e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.184143 ( -1.2386 0.970846 )
Epeak [keV] : 56.1920 ( -9.20014 19.1067 )
Norm@50keV : 1.60121E-02 ( -0.0160121 0.0590128 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.70 using 59 PHA bins.
# Reduced chi-squared = 0.8518 for 56 degrees of freedom
# Null hypothesis probability = 7.772946e-01
Photon flux (15-150 keV) in 29.2 sec: 0.214669 ( -0.027331 0.027474 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.24997e-07 ( -6.83806e-08 7.53652e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : ( )
beta : ( )
Epeak [keV] : ( )
Norm@50keV : ( )
------------------------------------------------------------
Photon flux (15-150 keV) in 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) = 1.25e-07
S(50-100 keV) = 1.71e-07
T90 vs. Hardness ratio plot
T90 = 25.4919999837875 sec.
Hardness ratio (energy fluence ratio) = 1.368
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.61856
Count Ratio (50-100 keV) / (15-25 keV) = 0.896652
Mask shadow pattern
IMX = 1.433178867959028E-01, IMY = -1.618503740141366E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000
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:
-239.928000 -11.196000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
83.6361 22.0138 1.5 55.2 177.8 7.9667 7.8 0.2 Crab
36.2195 -69.5128 2.6 42.5 -6.7 1.6379 4.4 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-11.196000 18.008000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
83.5997 21.9781 9.9 55.1 177.8 -0.3800 -1.2 2.9 Crab
34.7568 -52.4455 2.0 31.7 15.6 0.4896 5.7 ------ UNKNOWN
52.4817 -33.9908 0.8 12.2 48.5 0.9104 13.7 ------ UNKNOWN
123.8360 -68.3125 2.0 49.9 -45.8 1.9973 5.8 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
178.372590 815.372590
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
112.1549 51.9046 4.4 35.2 105.4 2.6563 2.6 ------ UNKNOWN
134.3593 1.4515 2.6 28.8 -11.5 2.1007 4.5 ------ UNKNOWN
166.0013 21.1182 3.0 18.9 -111.2 2.0985 3.9 ------ UNKNOWN
213.2945 45.6734 2.5 54.8 -165.6 6.4146 4.5 ------ UNKNOWN
134.4419 -24.7700 2.2 53.8 -23.8 7.3882 5.3 ------ UNKNOWN
158.6271 -17.7796 3.0 47.0 -53.3 9.4987 3.9 ------ UNKNOWN
178.9031 1.2914 4.4 40.8 -92.5 5.7664 2.6 ------ UNKNOWN
Plot creation:
Fri Oct 26 12:19:00 EDT 2018