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
358.4275 -28.6315 0.0184 33.8281 168.4542 0.2100755 10.453 TRIG_01344131
Foreground time interval of the image:
-0.460 1.200 (delta_t = 1.660 [sec])
Background time interval of the image:
-756.504 -666.488 (delta_t = 90.016 [sec])
-239.504 -0.460 (delta_t = 239.044 [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 -0.460 sec. to 1.200 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.835339 ( -0.432648 0.39065 )
Norm@50keV : 6.71303E-03 ( -0.00144587 0.00136466 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 44.80 using 59 bins.
Reduced chi-squared = 0.785965
# Null hypothesis probability of 8.80e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 1.66 sec: 0.770778 ( -0.156257 0.157667 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.28342e-07 ( -2.58761e-08 2.59946e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.460 sec. to 1.200 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.848257 ( -0.456368 0.375523 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 6.78645E-03 ( -0.00130924 0.00615324 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 44.83 using 59 bins.
Reduced chi-squared = 0.800536
# Null hypothesis probability of 8.58e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 1.66 sec: 0.770728 ( -0.156461 0.157426 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.28247e-07 ( -2.5843e-08 2.60109e-08 ) ergs/cm2
Band function
Time interval is from -0.460 sec. to 1.200 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] : 30.2504 (-8.92842 17.4822)
R^2/D10^2 : 1.06858E-02 (-0.00742805 0.0191849)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 52.66 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 6.38e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.527e-09 1.267e-09
25- 50 1.564e-08 6.959e-09
50-150 1.008e-07 4.403e-08
15-150 1.189e-07 5.293e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-53.7904 -200)
Norm : 3.21029 (-0.646975 0.646975)
------------------------------------------------------------
#Fit statistic : Chi-Squared 55.20 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 5.43e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.327e-08 7.693e-09
25- 50 2.553e-08 1.474e-08
50-150 5.598e-08 3.283e-08
15-150 9.478e-08 5.451e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.57319 (-2.28852 13.9281)
R1^2/D10^2 : 11.7713 (-10.8126 23824.3)
kT2 [keV] : 38.1495 (-12.9971 -38.2323)
R2^2/D10^2 : 5.46010E-03 (-0.00427379 0.0118113)
------------------------------------------------------------
#Fit statistic : Chi-Squared 44.50 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.43e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.177e-08 7.143e-09
25- 50 1.442e-08 7.632e-09
50-150 1.066e-07 6.177e-08
15-150 1.328e-07 6.695e-08
Peak spectrum fit
Power-law model
Time interval is from 0.064 sec. to 1.064 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.936505 ( -0.50915 0.450338 )
Norm@50keV : 7.80663E-03 ( -0.00185049 0.00175412 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 47.26 using 59 bins.
Reduced chi-squared = 0.829123
# Null hypothesis probability of 8.18e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 0.896520 ( -0.206969 0.2082 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.64132e-08 ( -2.03636e-08 2.05194e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.064 sec. to 1.064 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.932534 ( -0.547129 0.423535 )
Epeak [keV] : 1.00000E+04 ( -10000 -10000 )
Norm@50keV : 7.85731E-03 ( -0.00185105 -0.00785727 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 47.28 using 59 bins.
Reduced chi-squared = 0.844286
# Null hypothesis probability of 7.90e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 0.896583 ( -0.207264 0.207877 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.63038e-08 ( -1.91408e-08 2.0582e-08 ) ergs/cm2
Band function
Time interval is from 0.064 sec. to 1.064 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] : 29.4669 (-11.8444 29.526)
R^2/D10^2 : 1.27466E-02 (-0.0124059 0.0459518)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 56.08 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 5.10e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.751e-09 9.855e-10
25- 50 1.072e-08 5.784e-09
50-150 6.619e-08 3.648e-08
15-150 7.866e-08 4.522e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-71.0597 -200)
Norm : 3.72888 (-0.84765 0.84765)
------------------------------------------------------------
#Fit statistic : Chi-Squared 53.37 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 6.12e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.285e-09 5.615e-09
25- 50 1.786e-08 1.072e-08
50-150 3.917e-08 2.263e-08
15-150 6.632e-08 3.980e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.61755 (-3.64682 6.0489)
R1^2/D10^2 : 0.327925 (-0.323633 2.2099)
kT2 [keV] : 200.000 (-160.478 -200)
R2^2/D10^2 : 2.32464E-04 (-7.58515e-05 7.56237e-05)
------------------------------------------------------------
#Fit statistic : Chi-Squared 44.37 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.47e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.631e-09 4.164e-09
25- 50 1.648e-08 9.985e-09
50-150 6.991e-08 5.480e-08
15-150 9.302e-08 6.255e-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: 0.835339 ( -0.432648 0.39065 )
Norm@50keV : 6.71303E-03 ( -0.00144587 0.00136466 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 44.80 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.80e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 1.66 sec: 0.770766 ( -0.156236 0.15769 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.28328e-07 ( -2.58613e-08 2.60109e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.845029 ( -0.453197 0.378404 )
Epeak [keV] : 9999.34 ( -9999.36 -9999.36 )
Norm@50keV : 6.78189E-03 ( -0.00130614 0.00615845 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 44.83 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.58e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 1.66 sec: 0.775924 ( -0.162292 0.15272 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.28671e-07 ( -2.58807e-08 2.47813e-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) = 2.12e-08
S(50-100 keV) = 4.76e-08
T90 vs. Hardness ratio plot
T90 = 1.36399984359741 sec.
Hardness ratio (energy fluence ratio) = 2.24528
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.01114
Count Ratio (50-100 keV) / (15-25 keV) = 1.56303
Mask shadow pattern
IMX = -6.565914604301083E-01, IMY = -1.341316727650209E-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:
-756.504000 -666.487900
-239.504000 -0.460000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
255.9994 -37.8056 2.7 48.6 -25.8 4.2123 4.2 2.4 4U 1700-377
256.6053 -36.4478 10.4 48.7 -23.9 -1.0598 -1.1 8.3 GX 349+2
262.9959 -24.6232 13.1 49.1 -6.6 0.6856 0.9 7.4 GX 1+4
264.7523 -44.4931 4.1 40.4 -32.2 2.1581 2.8 2.6 4U 1735-44
270.3482 -24.9864 8.6 43.2 -2.3 1.0114 1.3 6.6 GX 5-1
270.1430 -25.7729 6.7 43.0 -3.4 1.2922 1.7 8.8 GRS 1758-258
274.0213 -13.9531 3.9 46.9 13.2 2.1499 3.0 5.1 GX 17+2
275.9744 -30.3640 7.7 36.3 -6.0 0.8634 1.5 2.6 H1820-303
285.0990 -24.8059 19.5 32.0 9.8 0.3100 0.6 7.7 HT1900.1-2455
262.9771 -33.7078 4.7 45.0 -17.7 1.9658 2.4 7.6 GX 354-0
310.4674 -43.9812 2.9 8.4 -46.7 1.6982 4.0 ------ UNKNOWN
259.8257 -24.8356 2.2 51.5 -8.8 4.2043 5.2 ------ UNKNOWN
302.5013 -63.1410 4.5 26.3 -78.9 1.5655 2.6 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-0.460000 1.200000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
255.9637 -37.8379 318.2 48.6 -25.9 0.0013 0.0 1.1 4U 1700-377
256.6036 -36.4311 3.8 48.7 -23.9 0.1076 3.1 8.1 GX 349+2
263.0139 -24.8788 32.3 49.0 -6.9 -0.0116 -0.4 8.0 GX 1+4
264.8474 -44.3744 7.9 40.3 -32.0 0.0373 1.5 6.4 4U 1735-44
270.2527 -24.9277 13.0 43.3 -2.3 0.0214 0.9 9.2 GX 5-1
270.4496 -25.7008 6.6 42.8 -3.1 0.0423 1.7 8.3 GRS 1758-258
274.0235 -14.1570 4.1 46.8 13.0 -0.0970 -2.8 7.3 GX 17+2
275.8525 -30.4471 4.3 36.3 -6.2 0.0535 2.7 6.1 H1820-303
285.1403 -24.8268 8.5 32.0 9.8 0.0271 1.4 8.0 HT1900.1-2455
262.9579 -33.8610 4.2 44.9 -17.9 -0.0750 -2.7 2.2 GX 354-0
343.7917 -7.3664 2.2 38.4 125.4 0.1842 5.2 ------ UNKNOWN
358.4275 -28.6315 1.1 33.8 168.5 0.2100 10.5 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
124.396600 715.395100
720.496000 837.256000
900.496000 962.539400
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
10.1252 -6.3104 3.4 24.9 -178.4 3.2784 3.4 ------ UNKNOWN
19.6325 -44.7621 3.4 23.3 -67.5 3.9080 3.4 ------ UNKNOWN
36.6224 -45.6958 2.4 34.5 -76.8 8.6476 4.9 ------ UNKNOWN
Plot creation:
Sun Mar 1 23:29:50 EST 2026