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
276.3386 -31.9180 0.0051 34.4327 45.0793 6.0965620 37.739 TRIG_00831810
Foreground time interval of the image:
-15.232 11.069 (delta_t = 26.301 [sec])
Background time interval of the image:
-239.232 -15.232 (delta_t = 224.000 [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 1.024000
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 1.024000
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 1.024000
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 -15.232 sec. to 64.768 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.45827 ( -0.0575992 0.0575513 )
Norm@50keV : 8.27748E-03 ( -0.000264413 0.00026441 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.36 using 59 PHA bins.
# Reduced chi-squared = 1.147 for 57 degrees of freedom
# Null hypothesis probability = 2.091905e-01
Photon flux (15-150 keV) in 80 sec: 1.02222 ( -0.036004 0.03611 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.32805e-06 ( -2.1145e-07 2.11685e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -15.232 sec. to 64.768 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.03482 ( -0.246729 0.234054 )
Epeak [keV] : 127.708 ( -27.4131 84.3873 )
Norm@50keV : 1.28618E-02 ( -0.002713 0.00364041 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.44 using 59 PHA bins.
# Reduced chi-squared = 0.9899 for 56 degrees of freedom
# Null hypothesis probability = 4.961602e-01
Photon flux (15-150 keV) in 80 sec: 0.994243 ( -0.03874 0.038947 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.18842e-06 ( -2.26589e-07 2.26034e-07 ) ergs/cm2
Band function
Time interval is from -15.232 sec. to 64.768 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] : 17.6690 ( )
R^2/D10^2 : 6.54284E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 225.85 using 59 PHA bins.
# Reduced chi-squared = 3.9622 for 57 degrees of freedom
# Null hypothesis probability = 5.896518e-22
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.291e-07 2.204e-08
25- 50 1.501e-06 7.360e-08
50-150 3.384e-06 1.820e-07
15-150 5.214e-06 1.880e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-8.72854 -200)
Norm : 4.24974 (-0.135856 0.135856)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.84 using 59 PHA bins.
# Reduced chi-squared = 1.225 for 57 degrees of freedom
# Null hypothesis probability = 1.182118e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.468e-07 3.120e-08
25- 50 1.629e-06 5.960e-08
50-150 3.573e-06 1.340e-07
15-150 6.048e-06 2.364e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.74685 (-0.867816 0.991732)
R1^2/D10^2 : 1.03549 (-0.392163 0.691908)
kT2 [keV] : 25.1640 (-2.03075 2.64579)
R2^2/D10^2 : 1.61371E-02 (-0.00506563 0.00605683)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.76 using 59 PHA bins.
# Reduced chi-squared = 0.9957 for 55 degrees of freedom
# Null hypothesis probability = 4.836415e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.236e-07 8.632e-08
25- 50 1.547e-06 1.232e-07
50-150 3.886e-06 2.888e-07
15-150 6.157e-06 3.752e-07
Peak spectrum fit
Power-law model
Time interval is from 8.268 sec. to 9.268 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.21583 ( -0.185889 0.183058 )
Norm@50keV : 2.87879E-02 ( -0.00300973 0.00299931 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.23 using 59 PHA bins.
# Reduced chi-squared = 0.8987 for 57 degrees of freedom
# Null hypothesis probability = 6.904280e-01
Photon flux (15-150 keV) in 1 sec: 3.38686 ( -0.37412 0.37529 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.9081e-07 ( -3.21257e-08 3.21956e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 8.268 sec. to 9.268 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.21137 ( -0.496946 0.22433 )
Epeak [keV] : 1.00000E+04 ( -10000 -10000 )
Norm@50keV : 2.89240E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.24 using 59 PHA bins.
# Reduced chi-squared = 0.9150 for 56 degrees of freedom
# Null hypothesis probability = 6.553400e-01
Photon flux (15-150 keV) in 1 sec: 3.39810 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.90743e-07 ( 0 0 ) ergs/cm2
Band function
Time interval is from 8.268 sec. to 9.268 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] : 21.1379 (-3.12438 3.81014)
R^2/D10^2 : 0.127990 (-0.0531394 0.0890534)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 80.37 using 59 PHA bins.
# Reduced chi-squared = 1.410 for 57 degrees of freedom
# Null hypothesis probability = 2.239894e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.077e-08 2.212e-09
25- 50 5.561e-08 9.450e-09
50-150 1.853e-07 3.285e-08
15-150 2.517e-07 3.365e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-27.22 -200)
Norm : 14.2713 (-1.51359 1.51359)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.76 using 59 PHA bins.
# Reduced chi-squared = 1.101 for 57 degrees of freedom
# Null hypothesis probability = 2.796314e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.555e-08 1.073e-08
25- 50 6.838e-08 3.415e-08
50-150 1.500e-07 8.248e-08
15-150 2.539e-07 1.307e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.31549 (-2.22943 2.69524)
R1^2/D10^2 : 1.86037 (-1.10588 3.56266)
kT2 [keV] : 40.5185 (-11.4652 36.3111)
R2^2/D10^2 : 1.37635E-02 (-0.0110402 0.0255125)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.24 using 59 PHA bins.
# Reduced chi-squared = 0.9135 for 55 degrees of freedom
# Null hypothesis probability = 6.566716e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.679e-08 1.256e-08
25- 50 6.447e-08 2.878e-08
50-150 2.054e-07 1.065e-07
15-150 2.966e-07 1.323e-07
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: 1.23634 ( -0.0622111 0.0617721 )
Norm@50keV : 1.60907E-02 ( -0.000572127 0.00057151 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.74 using 59 PHA bins.
# Reduced chi-squared = 0.9603 for 57 degrees of freedom
# Null hypothesis probability = 5.603700e-01
Photon flux (15-150 keV) in 26.3 sec: 1.89895 ( -0.0728768 0.0730613 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.25063e-06 ( -1.55179e-07 1.55314e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.883389 ( -0.263593 0.248715 )
Epeak [keV] : 185.176 ( -54.5167 273.137 )
Norm@50keV : 2.29384E-02 ( -0.00495529 0.00669596 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.75 using 59 PHA bins.
# Reduced chi-squared = 0.8705 for 56 degrees of freedom
# Null hypothesis probability = 7.433372e-01
Photon flux (15-150 keV) in 26.3 sec: 1.86326 ( -0.07661 0.07691 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.19535e-06 ( -1.62429e-07 1.61587e-07 ) 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) = 1.54e-06
S(50-100 keV) = 2.23e-06
T90 vs. Hardness ratio plot
T90 = 64 sec.
Hardness ratio (energy fluence ratio) = 1.44805
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.49407
Count Ratio (50-100 keV) / (15-25 keV) = 1.29109
Mask shadow pattern
IMX = 4.840881543379221E-01, IMY = -4.854305873561023E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
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:
-239.232000 -15.232000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.2724 35.3568 15.0 44.6 174.3 -0.4836 -0.8 9.1 Her X-1
263.0691 -24.7370 3.5 34.0 69.6 -1.8356 -3.3 3.3 GX 1+4
268.2090 -1.4760 11.2 17.5 111.9 -0.3750 -1.0 9.6 SW J1753.5-0127
270.2309 -24.9527 11.7 30.2 59.6 0.4431 1.0 8.1 GX 5-1
270.4290 -25.8400 4.3 30.9 58.4 1.2086 2.7 9.0 GRS 1758-258
274.0398 -14.0424 2.2 19.2 67.2 1.7357 5.2 2.0 GX 17+2
276.1233 -30.3727 11.6 33.0 46.2 0.4832 1.0 10.3 H1820-303
285.0851 -24.9337 8.5 26.3 32.1 0.4727 1.4 2.8 HT1900.1-2455
288.7969 10.9290 1.1 10.1 -129.7 2.8343 10.3 1.0 GRS 1915+105
299.6188 35.2485 3.8 36.3 -129.0 1.5159 3.0 3.1 Cyg X-1
308.0875 40.8999 5.8 44.5 -124.2 2.7613 2.0 3.3 Cyg X-3
262.9420 -33.9756 10.5 41.2 60.1 -1.1630 -1.1 8.8 GX 354-0
239.1378 36.0054 2.2 55.1 165.7 9.4739 5.1 ------ UNKNOWN
275.0850 7.1789 0.2 11.9 150.7 22.5689 76.9 ------ UNKNOWN
310.5032 -3.9349 2.8 25.6 -46.6 1.4012 4.1 ------ UNKNOWN
272.6419 56.9080 2.7 56.4 -157.1 8.1327 4.2 ------ UNKNOWN
306.5206 45.7213 2.4 48.0 -129.0 7.3656 4.9 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-15.232000 11.068590
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.4680 35.2667 7.0 44.5 174.4 0.2788 1.6 4.6 Her X-1
262.9289 -24.9144 0.0 34.2 69.5 -0.2343 -1.2 11.0 GX 1+4
268.3486 -1.4579 9.7 17.4 111.9 0.1235 1.2 1.2 SW J1753.5-0127
270.0583 -25.0233 0.0 30.4 59.8 0.2405 1.7 12.7 GX 5-1
270.1462 -25.6582 4.6 30.9 59.0 0.3545 2.5 9.9 GRS 1758-258
273.7952 -13.9858 0.0 19.3 67.8 -0.0475 -0.4 12.6 GX 17+2
275.8630 -30.5368 4.2 33.2 46.5 0.4374 2.7 10.7 H1820-303
285.1028 -24.7620 11.5 26.2 32.1 -0.1021 -1.0 10.2 HT1900.1-2455
288.8810 11.0989 15.3 10.3 -129.6 -0.0582 -0.8 10.4 GRS 1915+105
299.5936 35.1988 24.6 36.3 -129.0 0.0624 0.5 0.2 Cyg X-1
308.3035 40.8610 10.1 44.5 -124.0 0.3672 1.1 10.3 Cyg X-3
263.2298 -33.8916 7.2 41.0 59.9 -0.5293 -1.6 12.5 GX 354-0
276.3386 -31.9180 0.3 34.4 45.1 6.0967 37.6 ------ UNKNOWN
319.8216 -28.1196 2.3 44.2 -14.2 0.6879 5.0 ------ UNKNOWN
320.7015 -23.8997 2.1 42.6 -20.0 0.7171 5.4 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
76.868590 323.268600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9769 -15.6454 0.5 32.8 106.7 15.7815 23.0 0.3 Sco X-1
255.9501 -37.8602 1.0 17.7 59.0 3.5919 11.0 2.0 4U 1700-377
256.4351 -36.4299 5.2 17.0 63.5 0.7315 2.3 0.4 GX 349+2
263.0398 -24.7067 24.5 13.7 112.7 0.1783 0.5 2.9 GX 1+4
264.5383 -44.4364 7.0 15.5 27.2 0.5599 1.6 8.8 4U 1735-44
268.3188 -1.3545 12.8 31.5 158.9 -0.4401 -0.9 6.6 SW J1753.5-0127
270.3196 -25.0793 2.3 8.6 135.3 1.8923 5.1 1.9 GX 5-1
270.3090 -25.8378 7.0 8.0 132.0 0.5982 1.6 5.7 GRS 1758-258
273.8555 -14.0493 4.0 18.0 166.6 0.9932 2.9 8.8 GX 17+2
275.8075 -30.2057 10.8 1.8 160.3 0.3693 1.1 11.4 H1820-303
285.1972 -25.0744 0.0 10.4 -134.7 0.6199 1.7 12.7 HT1900.1-2455
288.7523 10.9541 2.5 44.5 -168.1 2.8592 4.7 2.8 GRS 1915+105
263.1629 -33.7173 5.3 11.2 71.5 0.7487 2.2 11.2 GX 354-0
275.0765 7.1881 0.3 39.1 172.4 23.8448 44.1 ------ UNKNOWN
183.2047 -86.8680 2.4 58.3 -2.0 9.0636 4.9 ------ UNKNOWN
287.7530 14.2432 2.5 47.4 -170.6 3.1365 4.6 ------ UNKNOWN
304.3883 2.7900 3.2 43.8 -142.9 2.5230 3.7 ------ UNKNOWN
336.8617 -61.4778 3.9 48.4 -39.5 3.8989 3.0 ------ UNKNOWN
314.6948 -0.3046 4.3 48.1 -129.1 5.7508 2.7 ------ UNKNOWN
Plot creation:
Thu May 31 18:06:07 EDT 2018