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
274.0822 24.1598 0.0108 10.6931 137.9157 1.6657284 17.905 TRIG_01413695
Foreground time interval of the image:
-28.296 29.757 (delta_t = 58.053 [sec])
Background time interval of the image:
-239.544 -28.296 (delta_t = 211.248 [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 2.048000
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 2.048000
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 2.048000
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 -28.296 sec. to 32.380 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.85125 ( -0.1474 0.152454 )
Norm@50keV : 1.53236E-03 ( -0.000153178 0.000151067 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 88.98 using 59 bins.
Reduced chi-squared = 1.56105
# Null hypothesis probability of 4.30e-03 with 57 degrees of freedom
Photon flux (15-150 keV) in 60.68 sec: 0.215510 ( -0.018217 0.018223 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.55096e-07 ( -8.49107e-08 8.63282e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -28.296 sec. to 32.380 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.785792 ( -0.810178 0.676364 )
Epeak [keV] : 48.5710 ( -7.92018 16.3505 )
Norm@50keV : 6.16610E-03 ( -0.00357632 0.0116941 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 81.08 using 59 bins.
Reduced chi-squared = 1.44786
# Null hypothesis probability of 1.59e-02 with 56 degrees of freedom
Photon flux (15-150 keV) in 60.68 sec: 0.207262 ( -0.018833 0.018861 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.73688e-07 ( -9.15449e-08 9.68052e-08 ) ergs/cm2
Band function
Time interval is from -28.296 sec. to 32.380 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] : 10.9225 (-1.0102 1.12828)
R^2/D10^2 : 7.44676E-02 (-0.0230915 0.0329269)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 97.46 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 6.79e-04 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.125e-07 1.702e-08
25- 50 3.152e-07 3.104e-08
50-150 2.112e-07 4.848e-08
15-150 6.388e-07 6.830e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 83.1996 (-20.2101 32.2363)
Norm : 1.00782 (-0.125019 0.139759)
------------------------------------------------------------
#Fit statistic : Chi-Squared 82.56 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.51e-02 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.590e-07 1.978e-08
25- 50 2.643e-07 2.266e-08
50-150 3.829e-07 1.454e-07
15-150 8.062e-07 1.514e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.28518 (-2.13703 2.29667)
R1^2/D10^2 : 0.343553 (-0.204338 1.06521)
kT2 [keV] : 17.6385 (-4.33791 11.0348)
R2^2/D10^2 : 8.51317E-03 (-0.0074371 0.021479)
------------------------------------------------------------
#Fit statistic : Chi-Squared 80.89 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.31e-02 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.490e-07 7.037e-08
25- 50 2.759e-07 1.184e-07
50-150 3.454e-07 1.846e-07
15-150 7.704e-07 3.642e-07
Peak spectrum fit
Power-law model
Time interval is from 1.052 sec. to 2.052 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.59440 ( -0.343314 0.356472 )
Norm@50keV : 5.35822E-03 ( -0.00120865 0.0011794 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 48.15 using 59 bins.
Reduced chi-squared = 0.844737
# Null hypothesis probability of 7.92e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 0.687390 ( -0.141592 0.141649 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.01522e-08 ( -1.19455e-08 1.22313e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.052 sec. to 2.052 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.18983 ( -1.65284 0.735832 )
Epeak [keV] : 90.9014 ( -90.9147 -90.9147 )
Norm@50keV : 8.98283E-03 ( -0.00898289 0.0695998 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 47.83 using 59 bins.
Reduced chi-squared = 0.854107
# Null hypothesis probability of 7.73e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 0.680490 ( -0.14322 0.143141 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.8337e-08 ( -1.32828e-08 1.32757e-08 ) ergs/cm2
Band function
Time interval is from 1.052 sec. to 2.052 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] : 11.7166 (-2.81345 4.17578)
R^2/D10^2 : 0.187280 (-0.12448 0.319645)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 53.35 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 6.13e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.425e-09 2.468e-09
25- 50 1.659e-08 6.698e-09
50-150 1.348e-08 6.580e-09
15-150 3.550e-08 1.341e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 162.927 (-92.9959 -161.537)
Norm : 2.82177 (-0.609995 0.803365)
------------------------------------------------------------
#Fit statistic : Chi-Squared 47.82 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.01e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.034e-09 4.176e-09
25- 50 1.347e-08 7.800e-09
50-150 2.916e-08 1.719e-08
15-150 4.967e-08 2.847e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.63239 (-2.70356 3.31812)
R1^2/D10^2 : 0.669200 (-0.470443 2.1896)
kT2 [keV] : 32.7713 (-16.0557 -32.7895)
R2^2/D10^2 : 3.55073E-03 (-0.00325797 0.0361958)
------------------------------------------------------------
#Fit statistic : Chi-Squared 46.16 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 7.96e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.356e-09 4.323e-09
25- 50 1.454e-08 7.910e-09
50-150 2.871e-08 1.558e-08
15-150 5.061e-08 2.592e-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: 1.80791 ( -0.154675 0.159869 )
Norm@50keV : 1.48775E-03 ( -0.000155165 0.000152989 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 96.32 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.80e-04 with 57 degrees of freedom
Photon flux (15-150 keV) in 58.05 sec: 0.205641 ( -0.0184209 0.0184263 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.94873e-07 ( -8.36622e-08 8.49736e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.803240 ( -0.826165 0.687341 )
Epeak [keV] : 51.4764 ( -9.12344 23.3433 )
Norm@50keV : 5.47315E-03 ( -0.00318936 0.010543 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 89.62 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 2.89e-03 with 56 degrees of freedom
Photon flux (15-150 keV) in 58.05 sec: 0.198303 ( -0.018992 0.019016 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.24255e-07 ( -9.02097e-08 9.50046e-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) = 2.45e-07
S(50-100 keV) = 2.72e-07
T90 vs. Hardness ratio plot
T90 = 55.3959999084473 sec.
Hardness ratio (energy fluence ratio) = 1.1102
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.11258
Count Ratio (50-100 keV) / (15-25 keV) = 0.588136
Mask shadow pattern
IMX = -1.401396433593152E-01, IMY = -1.265561355325417E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 2.048000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 2.048000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 2.048000
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:
-239.544000 -28.296000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.6977 35.3559 182.6 11.6 8.2 0.0188 0.1 11.8 Her X-1
262.7819 -24.7207 9.5 50.6 -139.1 1.7215 1.2 12.5 GX 1+4
268.4865 -1.5464 16.8 28.0 -151.7 -0.2407 -0.7 9.1 SW J1753.5-0127
270.3767 -25.1881 9.0 51.6 -147.9 -1.2501 -1.3 8.2 GX 5-1
270.2973 -25.7364 3.6 52.2 -147.7 -3.3800 -3.2 0.5 GRS 1758-258
273.9875 -14.0407 3.1 41.5 -155.8 1.8909 3.8 1.1 GX 17+2
275.9641 -30.4318 90.6 57.8 -152.5 0.2396 0.1 4.4 H1820-303
285.1059 -24.9565 5.4 55.3 -163.9 2.2402 2.1 4.4 HT1900.1-2455
288.8674 10.8800 5.8 29.1 157.3 0.8839 2.0 5.7 GRS 1915+105
299.6022 35.2128 0.8 33.1 105.8 7.5155 14.3 0.9 Cyg X-1
308.3252 40.9140 8.9 40.6 97.7 1.2336 1.3 10.0 Cyg X-3
291.1667 48.9991 3.3 32.1 77.7 1.9698 3.5 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-28.296000 29.756600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.5198 35.3607 14.0 11.7 7.6 0.0737 0.8 3.2 Her X-1
262.8758 -24.7128 506.4 50.6 -139.2 -0.0090 -0.0 7.5 GX 1+4
268.3195 -1.6010 76.5 28.0 -151.3 -0.0152 -0.2 9.4 SW J1753.5-0127
270.1544 -25.0402 11.3 51.4 -147.7 -0.3210 -1.0 7.4 GX 5-1
270.3005 -25.7762 6.0 52.2 -147.7 0.6366 1.9 2.0 GRS 1758-258
274.0271 -14.1973 7.2 41.6 -155.8 0.2425 1.6 9.7 GX 17+2
275.8555 -30.4203 200.2 57.7 -152.4 0.0313 0.1 4.8 H1820-303
284.9882 -24.7733 4.5 55.1 -163.8 0.9223 2.6 9.2 HT1900.1-2455
288.7304 11.0754 5.4 28.9 157.1 0.2501 2.1 8.8 GRS 1915+105
299.8076 35.1430 0.0 33.3 106.0 0.2739 1.6 11.2 Cyg X-1
308.1052 40.8780 29.1 40.5 97.7 0.1608 0.4 4.5 Cyg X-3
279.2537 25.5610 2.4 15.2 128.7 0.4746 4.8 ------ UNKNOWN
274.0820 24.1606 0.7 10.7 137.9 1.6634 17.9 ------ UNKNOWN
267.4139 -28.1820 2.2 54.3 -144.1 2.5549 5.2 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
69.556600 95.934500
97.456000 962.507300
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.2470 35.3064 13.1 20.4 -13.2 -1.0857 -0.9 10.5 Her X-1
268.3304 -1.3977 12.8 26.2 -127.8 1.2448 0.9 4.0 SW J1753.5-0127
270.4907 -25.1132 4.1 49.5 -136.5 15.4589 2.8 11.4 GX 5-1
270.1762 -25.7260 7.3 50.1 -136.2 9.4716 1.6 6.9 GRS 1758-258
274.0835 -14.0311 5.9 38.3 -140.8 4.0346 2.0 4.5 GX 17+2
284.9163 -24.9722 7.0 50.3 -153.6 -5.2235 -1.7 7.2 HT1900.1-2455
289.0018 10.9035 0.0 19.5 169.8 -1.5369 -1.3 12.2 GRS 1915+105
299.6157 35.2184 0.7 24.7 97.0 28.6082 16.4 1.6 Cyg X-1
308.1418 40.9594 49.3 33.0 90.5 0.5231 0.2 1.5 Cyg X-3
212.8188 38.0384 2.5 53.2 -20.2 15.2713 4.5 ------ UNKNOWN
Plot creation:
Sun Mar 1 23:13:34 EST 2026