Estimated redshift from machine learning (Ukwatta et al. 2016) - may take a few minutes to calcaulte
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
257.0892 -40.1341 0.0221 14.5 119.0 1.5136 8.7 TRIG_00975998
------------------------------------------
Foreground time interval of the image:
-0.276 59.724 (delta_t = 60.000 [sec])
Background time interval of the image:
-28.975 -0.276 (delta_t = 28.699 [sec])
Lightcurves
Notes:
- 1) All plots contain as much data as has been downloaded to date.
- 2) The mask-weighted light curves are using the flight position.
- 3) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 4) 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.
- 5) 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.
- 6) 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 0.064000
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 0.064000
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 0.064000
SN=5 or 10 sec. binning (whichever binning is satisfied first)
SN=5 or 10 sec. binning (T < 200 sec)
Spectra
Notes:
- 1) The fitting includes the systematic errors.
- 2) For long bursts, a spectral fit of 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.
- 4) For short bursts (T90<1sec), the specrtum is also fit with Blackbody, OTTB, and Double Blackbody.
Time averaged spectrum fit using the pre-slew DRM
Power-law model
Time interval is from -0.276 sec. to 59.724 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.46094 ( -0.224119 0.242878 )
Norm@50keV : 9.99723E-04 ( -0.000181704 0.000182297 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.44 using 59 PHA bins.
# Reduced chi-squared = 1.008 for 57 degrees of freedom
# Null hypothesis probability = 4.588468e-01
Photon flux (15-150 keV) in 60 sec: 0.191786 ( -0.0216434 0.0216456 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.93698e-07 ( -8.20536e-08 8.53548e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.276 sec. to 59.724 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.865644 ( -2.45908 1.45644 )
Epeak [keV] : 28.4660 ( -4.38811 3.59064 )
Norm@50keV : 0.151632 ( -0.185761 6.67968 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.22 using 59 PHA bins.
# Reduced chi-squared = 0.7360 for 56 degrees of freedom
# Null hypothesis probability = 9.303605e-01
Photon flux (15-150 keV) in 60 sec: 0.179686 ( -0.021198 0.021311 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.87135e-07 ( -6.25278e-08 6.80232e-08 ) ergs/cm2
Band function
Time interval is from -0.276 sec. to 59.724 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.10426 ( -1.84277 -0.866056 )
beta : -9.99866 ( 9.99866 0.0013684 )
Epeak [keV] : 28.6635 ( -3.02539 3.34911 )
Norm@50keV : 0.218441 ( -0.023748 6.45711 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.15 using 59 PHA bins.
# Reduced chi-squared = 0.7483 for 55 degrees of freedom
# Null hypothesis probability = 9.170812e-01
Photon flux (15-150 keV) in 60 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 4.72282e-07 ( -4.71862e-07 -7.338e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.46775 (-0.731013 0.802545)
R^2/D10^2 : 0.291507 (-0.101309 0.1562)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.28 using 59 PHA bins.
# Reduced chi-squared = 0.7242 for 57 degrees of freedom
# Null hypothesis probability = 9.419122e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.668e-07 3.210e-08
25- 50 2.581e-07 3.939e-08
50-150 5.374e-08 2.069e-08
15-150 4.786e-07 7.368e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 30.7898 (-6.56968 9.1474)
Norm : 1.53141 (-0.312947 0.405961)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.56 using 59 PHA bins.
# Reduced chi-squared = 0.8345 for 57 degrees of freedom
# Null hypothesis probability = 8.090474e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.895e-07 2.766e-08
25- 50 2.196e-07 3.288e-08
50-150 1.244e-07 4.716e-08
15-150 5.335e-07 8.541e-08
Double BB
# Reduced chi-squared = 0.7156 for 55 degrees of freedom
# Reduced chi-squared = 0.7146 for 55 degrees of freedom
# Reduced chi-squared = 0.7140 for 55 degrees of freedom
# Reduced chi-squared = 0.7137 for 55 degrees of freedom
# Reduced chi-squared = 0.7135 for 55 degrees of freedom
# Null hypothesis probability = 9.382481e-01
# Null hypothesis probability = 9.414330e-01
# Null hypothesis probability = 9.435312e-01
# Null hypothesis probability = 9.448590e-01
# Null hypothesis probability = 9.456104e-01
# Null hypothesis probability = 9.460309e-01
# Null hypothesis probability = 9.462544e-01
# Null hypothesis probability = 9.463912e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.660e-07 3.555e-08
25- 50 2.566e-07 4.902e-08
50-150 5.853e-08 2.413e-08
15-150 4.811e-07 8.616e-08
Peak spectrum fit
Power-law model
Time interval is from -0.276 sec. to 0.724 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.03425 ( )
Norm@50keV : 2.17751E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 133.52 using 59 PHA bins.
# Reduced chi-squared = 2.3425 for 57 degrees of freedom
# Null hypothesis probability = 4.419054e-08
Photon flux (15-150 keV) in 1 sec: 3.31875 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.0124e-07 ( 0 0 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.276 sec. to 0.724 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.47362 ( -0.991564 0.850221 )
Epeak [keV] : 38.4625 ( -2.15648 2.38841 )
Norm@50keV : 2.78864 ( -2.78929 8.39163 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.22 using 59 PHA bins.
# Reduced chi-squared = 0.9682 for 56 degrees of freedom
# Null hypothesis probability = 5.425751e-01
Photon flux (15-150 keV) in 1 sec: 3.22620 ( -0.22934 0.22982 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.74059e-07 ( -1.3292e-08 1.3756e-08 ) ergs/cm2
Band function
Time interval is from -0.276 sec. to 0.724 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 2.43045 ( -1.19871 2.51407 )
beta : -3.65620 ( 3.84762 0.732211 )
Epeak [keV] : 36.2934 ( -2.73657 3.15632 )
Norm@50keV : 12.4073 ( -11.2527 212.192 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.60 using 59 PHA bins.
# Reduced chi-squared = 0.9564 for 55 degrees of freedom
# Null hypothesis probability = 5.668829e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.83399e-07 ( -1.83392e-07 -1.7812e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.88263 (-0.546227 0.578469)
R^2/D10^2 : 1.86273 (-0.380017 0.469661)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.82 using 59 PHA bins.
# Reduced chi-squared = 0.9618 for 57 degrees of freedom
# Null hypothesis probability = 5.571444e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.690e-08 3.990e-09
25- 50 9.021e-08 6.315e-09
50-150 4.550e-08 7.720e-09
15-150 1.726e-07 1.280e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 56.8551 (-8.58813 10.3177)
Norm : 18.7198 (-1.90601 1.98044)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 95.96 using 59 PHA bins.
# Reduced chi-squared = 1.684 for 57 degrees of freedom
# Null hypothesis probability = 9.530390e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.661e-08 4.445e-09
25- 50 6.976e-08 4.810e-09
50-150 7.583e-08 1.271e-08
15-150 1.922e-07 1.515e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.66700 (-9.45268 0.844813)
R1^2/D10^2 : 1.99668 (-0.546539 0.902219)
kT2 [keV] : 193.098 (-190.782 -190.782)
R2^2/D10^2 : 5.52590E-05 (-5.59448e-05 2.33669)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.14 using 59 PHA bins.
#Fit statistic : Chi-Squared = 52.98 using 59 PHA bins.
# Reduced chi-squared = 0.9661 for 55 degrees of freedom
# Reduced chi-squared = 0.9633 for 55 degrees of freedom
# Null hypothesis probability = 5.460859e-01
# Null hypothesis probability = 5.520693e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.807e-08 4.600e-09
25- 50 8.882e-08 1.787e-08
50-150 5.570e-08 2.217e-08
15-150 1.826e-07 4.050e-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: 2.46094 ( -0.224119 0.242878 )
Norm@50keV : 9.99723E-04 ( -0.000181704 0.000182297 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.44 using 59 PHA bins.
# Reduced chi-squared = 1.008 for 57 degrees of freedom
# Null hypothesis probability = 4.588468e-01
Photon flux (15-150 keV) in 60 sec: 0.191786 ( -0.0216434 0.0216456 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.93698e-07 ( -8.20536e-08 8.53548e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.865644 ( -2.45908 1.45644 )
Epeak [keV] : 28.4660 ( -4.38811 3.59064 )
Norm@50keV : 0.151632 ( -0.185761 6.67968 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.22 using 59 PHA bins.
# Reduced chi-squared = 0.7360 for 56 degrees of freedom
# Null hypothesis probability = 9.303605e-01
Photon flux (15-150 keV) in 60 sec: 0.179686 ( -0.021198 0.021311 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.87135e-07 ( -6.25278e-08 6.80232e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.10426 ( -1.84277 -0.866056 )
beta : -9.99866 ( 9.99866 0.00142787 )
Epeak [keV] : 28.6635 ( -3.02539 3.34911 )
Norm@50keV : 0.218441 ( -0.023748 6.45711 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.15 using 59 PHA bins.
# Reduced chi-squared = 0.7483 for 55 degrees of freedom
# Null hypothesis probability = 9.170812e-01
Photon flux (15-150 keV) in 60 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 4.72282e-07 ( -4.71862e-07 -7.338e-08 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 1.96e-07
S(50-100 keV) = 1.43e-07
T90 vs. Hardness ratio plot
T90 = 52 sec.
Hardness ratio (energy fluence ratio) = 0.729592
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.95551
Count Ratio (50-100 keV) / (15-25 keV) = 0.0954132
Mask shadow pattern
IMX = -1.255400537819071E-01, IMY = -2.267216342563589E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.064000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.064000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.064000
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:
-28.975400 -0.276000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.6316 -60.4902 0.0 40.0 -73.1 0.5450 2.2 12.3 Cen X-3
186.6345 -62.8348 1.3 32.1 -75.2 1.0728 9.1 3.9 GX 301-2
244.9659 -15.6478 1.7 33.6 67.8 0.8874 6.9 0.9 Sco X-1
255.9798 -37.7991 4.5 15.6 110.4 0.2002 2.6 2.7 4U 1700-377
256.4634 -36.5382 5.2 16.9 108.7 0.1711 2.2 7.0 GX 349+2
263.0060 -24.8094 5.9 29.8 104.2 -0.2110 -2.0 3.8 GX 1+4
264.9502 -44.4572 3.8 17.0 144.2 0.2200 3.0 8.9 4U 1735-44
270.1484 -25.0108 7.7 33.1 114.9 0.1918 1.5 8.4 GX 5-1
270.4260 -25.9221 0.0 32.5 116.2 -0.1210 -1.0 12.6 GRS 1758-258
275.9701 -30.2747 5.0 32.4 128.4 0.2758 2.3 6.0 H1820-303
285.0343 -24.9225 251.3 41.9 131.9 -0.0100 -0.0 0.2 HT1900.1-2455
262.9535 -33.8622 6.0 22.3 116.0 0.1443 1.9 2.4 GX 354-0
200.7998 -11.9164 2.4 49.7 5.0 0.7920 4.8 ------ UNKNOWN
176.7346 -20.0166 2.1 58.2 -23.6 2.3051 5.5 ------ UNKNOWN
1.2057 -72.5765 2.3 51.6 -138.6 1.7993 5.1 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-0.276000 59.724000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.2042 -60.5094 14.1 40.2 -73.3 -0.4847 -0.8 7.6 Cen X-3
186.6688 -62.9031 5.1 32.1 -75.3 -0.6754 -2.2 8.0 GX 301-2
244.8950 -15.5984 12.6 33.6 67.7 -0.2833 -0.9 5.5 Sco X-1
255.8726 -37.6536 0.0 15.7 109.8 0.3090 1.7 12.6 4U 1700-377
256.3226 -36.5494 7.1 16.8 108.4 -0.2918 -1.6 9.3 GX 349+2
263.0818 -24.8038 4.1 29.8 104.3 0.7028 2.8 5.3 GX 1+4
264.7748 -44.4377 6.5 16.9 144.0 -0.3128 -1.8 1.6 4U 1735-44
270.1557 -24.9568 24.2 33.2 114.8 -0.1482 -0.5 10.1 GX 5-1
270.4494 -25.7405 12.6 32.7 116.1 0.2831 0.9 7.9 GRS 1758-258
276.0267 -30.3105 4.3 32.4 128.5 -0.7366 -2.7 6.3 H1820-303
285.1894 -24.9821 9.0 41.9 132.1 0.6204 1.3 9.1 HT1900.1-2455
262.8139 -33.9465 4.5 22.2 115.9 -0.4699 -2.5 11.0 GX 354-0
244.5678 -7.5795 2.4 41.6 66.2 3.2312 4.8 ------ UNKNOWN
228.2996 -19.9486 2.4 30.8 37.1 1.0962 4.8 ------ UNKNOWN
257.0892 -40.1341 1.3 14.5 119.0 1.5138 8.8 ------ UNKNOWN
168.9023 -52.4988 2.3 43.7 -62.5 3.3472 5.0 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
Plot creation:
Fri Jun 5 09:18:37 EDT 2020