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
82.9051 -23.6948 0.0142 38.5349 -104.8249 3.0996897 13.529 TRIG_00819490
Foreground time interval of the image:
-9.912 35.629 (delta_t = 45.541 [sec])
Background time interval of the image:
-239.672 -9.912 (delta_t = 229.760 [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 -9.912 sec. to 257.160 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.87738 ( -0.122615 0.126093 )
Norm@50keV : 1.41453E-03 ( -0.000115299 0.00011404 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.31 using 59 PHA bins.
# Reduced chi-squared = 1.146 for 57 degrees of freedom
# Null hypothesis probability = 2.102736e-01
Photon flux (15-150 keV) in 267.1 sec: 0.201091 ( -0.014329 0.014338 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.47388e-06 ( -2.8003e-07 2.83062e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -9.912 sec. to 257.160 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.896890 ( -0.600785 0.529919 )
Epeak [keV] : 50.1352 ( -7.29119 12.1333 )
Norm@50keV : 4.89185E-03 ( -0.00235378 0.00549502 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.31 using 59 PHA bins.
# Reduced chi-squared = 0.9698 for 56 degrees of freedom
# Null hypothesis probability = 5.391783e-01
Photon flux (15-150 keV) in 267.1 sec: 0.193435 ( -0.014831 0.014848 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.21206e-06 ( -2.97766e-07 3.07053e-07 ) ergs/cm2
Band function
Time interval is from -9.912 sec. to 257.160 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.896844 ( -0.380636 0.835257 )
beta : -10.0000 ( 10 7.10543e-15 )
Epeak [keV] : 50.1252 ( -7.2917 12.1279 )
Norm@50keV : 4.89197E-03 ( -0.00235418 0.00549897 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.31 using 59 PHA bins.
# Reduced chi-squared = 0.9874 for 55 degrees of freedom
# Null hypothesis probability = 5.010434e-01
Photon flux (15-150 keV) in 267.1 sec: 0.194703 ( -0.016264 0.013771 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.26682e-06 ( -3.59092e-07 2.53352e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 11.5104 (-0.933048 1.01522)
R^2/D10^2 : 5.63119E-02 (-0.0153644 0.0211103)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 84.91 using 59 PHA bins.
# Reduced chi-squared = 1.490 for 57 degrees of freedom
# Null hypothesis probability = 9.656838e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.196e-07 5.249e-08
25- 50 1.256e-06 9.549e-08
50-150 9.721e-07 1.589e-07
15-150 2.648e-06 2.272e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 83.0174 (-16.8188 24.3508)
Norm : 0.938835 (-0.0953543 0.108109)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.88 using 59 PHA bins.
# Reduced chi-squared = 0.9803 for 57 degrees of freedom
# Null hypothesis probability = 5.172023e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.521e-07 6.905e-08
25- 50 1.083e-06 8.040e-08
50-150 1.567e-06 5.023e-07
15-150 3.302e-06 4.581e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.52390 (-1.25538 1.4925)
R1^2/D10^2 : 0.497618 (-0.278344 0.838001)
kT2 [keV] : 17.0427 (-2.58032 3.93146)
R2^2/D10^2 : 9.91082E-03 (-0.00590355 0.0101256)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.07 using 59 PHA bins.
# Reduced chi-squared = 0.9467 for 55 degrees of freedom
# Null hypothesis probability = 5.872435e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.303e-07 2.547e-07
25- 50 1.086e-06 3.244e-07
50-150 1.465e-06 5.279e-07
15-150 3.182e-06 9.975e-07
Peak spectrum fit
Power-law model
Time interval is from 1.564 sec. to 2.564 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.91187 ( -0.521688 0.636509 )
Norm@50keV : 9.88488E-03 ( -0.00392955 0.00355764 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.84 using 59 PHA bins.
# Reduced chi-squared = 1.032 for 57 degrees of freedom
# Null hypothesis probability = 4.079551e-01
Photon flux (15-150 keV) in 1 sec: 1.42588 ( -0.42526 0.42525 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.09055e-08 ( -3.29092e-08 3.38156e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.564 sec. to 2.564 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.88843 ( -1.73557 0.951249 )
Epeak [keV] : 212.647 ( )
Norm@50keV : 1.01549E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.84 using 59 PHA bins.
# Reduced chi-squared = 1.051 for 56 degrees of freedom
# Null hypothesis probability = 3.717839e-01
Photon flux (15-150 keV) in 1 sec: 1.42220 ( -0.699479 0.42895 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from 1.564 sec. to 2.564 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -5.22460 ( 5.2246 5.2246 )
beta : -1.91187 ( -0.636508 0.521662 )
Epeak [keV] : 67.9036 ( -67.9036 -67.9036 )
Norm@50keV : 1.34349 ( -0.534081 0.483538 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.84 using 59 PHA bins.
# Reduced chi-squared = 1.070 for 55 degrees of freedom
# Null hypothesis probability = 3.368155e-01
Photon flux (15-150 keV) in 1 sec: 1.37449 ( -0.379264 0.48409 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.09055e-08 ( -3.29092e-08 3.38156e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.40496 (-2.84862 14.8436)
R^2/D10^2 : 1.96839 (-1.90259 12.0189)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.86 using 59 PHA bins.
# Reduced chi-squared = 1.155 for 57 degrees of freedom
# Null hypothesis probability = 1.971407e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.831e-08 1.165e-08
25- 50 2.790e-08 1.735e-08
50-150 5.643e-09 4.631e-09
15-150 5.186e-08 3.373e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 92.4427 (-58.9264 -92.4475)
Norm : 6.43198 (-2.28194 4.11541)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.36 using 59 PHA bins.
# Reduced chi-squared = 1.041 for 57 degrees of freedom
# Null hypothesis probability = 3.895988e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.679e-08 1.065e-08
25- 50 2.857e-08 1.759e-08
50-150 4.422e-08 3.627e-08
15-150 8.959e-08 6.205e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.63943 (-2.1432 2.58987)
R1^2/D10^2 : 10.0651 (-8.50385 21.6011)
kT2 [keV] : 22.7554 (-8.80856 25.5147)
R2^2/D10^2 : 2.60381E-02 (-0.023398 0.0550805)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.09 using 59 PHA bins.
# Reduced chi-squared = 1.038 for 55 degrees of freedom
# Null hypothesis probability = 3.974476e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.042e-08 1.304e-08
25- 50 2.296e-08 1.194e-08
50-150 5.152e-08 3.556e-08
15-150 9.489e-08 5.330e-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: 2.01048 ( -0.171823 0.181613 )
Norm@50keV : 4.37840E-03 ( -0.000518696 0.000507829 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.69 using 59 PHA bins.
# Reduced chi-squared = 0.9419 for 57 degrees of freedom
# Null hypothesis probability = 6.000606e-01
Photon flux (15-150 keV) in 45.54 sec: 0.659947 ( -0.0638496 0.0638933 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.83983e-06 ( -2.03884e-07 2.06661e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.25550 ( -0.769944 0.667259 )
Epeak [keV] : 44.7323 ( -22.6146 21.8123 )
Norm@50keV : 1.13078E-02 ( -0.00630352 0.0179286 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.85 using 59 PHA bins.
# Reduced chi-squared = 0.8902 for 56 degrees of freedom
# Null hypothesis probability = 7.053884e-01
Photon flux (15-150 keV) in 45.54 sec: 0.641599 ( -0.065681 0.065732 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.75391e-06 ( -2.106e-07 2.17522e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.25824 ( -0.774936 0.679748 )
beta : -10.0000 ( 10 1.06581e-14 )
Epeak [keV] : 44.7987 ( -22.7391 21.7693 )
Norm@50keV : 1.12557E-02 ( -0.00625098 0.0180452 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.85 using 59 PHA bins.
# Reduced chi-squared = 0.9064 for 55 degrees of freedom
# Null hypothesis probability = 6.710527e-01
Photon flux (15-150 keV) in 45.54 sec: 0.649045 ( -0.07402 0.06119 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.80473e-06 ( -2.67558e-07 1.74894e-07 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 1.01e-06
S(50-100 keV) = 1.10e-06
T90 vs. Hardness ratio plot
T90 = 213.536000013351 sec.
Hardness ratio (energy fluence ratio) = 1.08911
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.26994
Count Ratio (50-100 keV) / (15-25 keV) = 0.727494
Mask shadow pattern
IMX = -2.037799709813925E-01, IMY = 7.699208746149095E-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:
-239.672000 -9.912000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
83.6273 22.0139 1.1 49.9 -38.9 7.4269 11.0 0.3 Crab
135.5308 -40.5748 2.3 31.7 168.4 1.2620 5.0 1.2 Vela X-1
93.8875 -27.1514 3.3 30.2 -116.3 0.9604 3.5 ------ UNKNOWN
79.7215 -15.7477 3.3 40.7 -91.9 3.2498 3.5 ------ UNKNOWN
79.6753 -7.5188 2.9 41.3 -79.4 3.2329 4.0 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-9.912000 35.628590
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
83.5520 21.9614 5.7 49.9 -39.0 0.5478 2.0 5.5 Crab
135.6066 -40.5517 5.5 31.7 168.2 0.2169 2.1 3.6 Vela X-1
115.6706 37.2019 2.7 48.9 3.0 0.7546 4.3 ------ UNKNOWN
82.9066 -23.6960 0.9 38.5 -104.8 3.1072 13.6 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
93.028590 962.448000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
83.6377 22.0226 0.3 45.7 -8.4 34.0352 34.7 0.5 Crab
49.0902 -66.5127 2.7 47.8 -171.8 5.7780 4.3 ------ UNKNOWN
74.7483 35.3785 3.6 59.6 -17.0 10.5735 3.2 ------ UNKNOWN
67.0108 18.6457 3.9 45.1 -30.8 2.9293 3.0 ------ UNKNOWN
28.6339 -37.3916 3.3 48.1 -129.1 10.0603 3.4 ------ UNKNOWN
Plot creation:
Wed May 30 17:14:01 EDT 2018