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
35.4579 -82.7864 0.0045 32.7578 -74.2849 7.2483917 42.694 TRIG_01336720
Foreground time interval of the image:
-1.772 9.504 (delta_t = 11.276 [sec])
Background time interval of the image:
-85.179 -1.772 (delta_t = 83.407 [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 -1.772 sec. to 9.504 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.15265 ( -0.0453289 0.0451195 )
Norm@50keV : 4.34047E-02 ( -0.00112614 0.00112484 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 49.22 using 59 bins.
Reduced chi-squared = 0.863509
# Null hypothesis probability of 7.58e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 11.28 sec: 5.06347 ( -0.1396 0.13987 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.03673e-06 ( -1.33879e-07 1.33962e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -1.772 sec. to 9.504 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.804206 ( -0.192661 0.184759 )
Epeak [keV] : 206.108 ( -51.9635 155.505 )
Norm@50keV : 6.10282E-02 ( -0.00985535 0.0122218 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 38.52 using 59 bins.
Reduced chi-squared = 0.687857
# Null hypothesis probability of 9.64e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 11.28 sec: 4.97186 ( -0.14652 0.1469 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.97873e-06 ( -1.38803e-07 1.38664e-07 ) ergs/cm2
Band function
Time interval is from -1.772 sec. to 9.504 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] : 21.4856 ( )
R^2/D10^2 : 0.188172 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 267.89 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 4.55e-29 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.833e-07 9.701e-09
25- 50 9.555e-07 3.649e-08
50-150 3.293e-06 1.354e-07
15-150 4.431e-06 1.241e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 21.6690 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared 281.59 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.88e-31 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.086e-07 1.698e-08
25- 50 1.171e-06 3.271e-08
50-150 2.568e-06 7.276e-08
15-150 4.347e-06 1.167e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.62491 (-1.08398 1.22584)
R1^2/D10^2 : 1.90855 (-0.611605 0.995748)
kT2 [keV] : 32.5885 (-2.98904 4.25548)
R2^2/D10^2 : 4.08674E-02 (-0.0139999 0.0163545)
------------------------------------------------------------
#Fit statistic : Chi-Squared 43.25 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.74e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.772e-07 3.937e-08
25- 50 1.068e-06 6.689e-08
50-150 3.551e-06 2.233e-07
15-150 4.996e-06 2.820e-07
Peak spectrum fit
Power-law model
Time interval is from 0.060 sec. to 1.060 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.08912 ( -0.0746295 0.0741858 )
Norm@50keV : 0.108137 ( -0.00479295 0.00479048 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 63.38 using 59 bins.
Reduced chi-squared = 1.11193
# Null hypothesis probability of 2.62e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 0.480977 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.13467e-06 ( -5.45053e-08 5.46261e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.060 sec. to 1.060 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.672728 ( -0.328531 0.306495 )
Epeak [keV] : 182.552 ( -56.1376 316.352 )
Norm@50keV : 0.166766 ( -0.0445557 0.0655 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 57.90 using 59 bins.
Reduced chi-squared = 1.03393
# Null hypothesis probability of 4.05e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 12.3669 ( -0.5824 0.5828 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.11836e-06 ( -5.69333e-08 5.66728e-08 ) ergs/cm2
Band function
Time interval is from 0.060 sec. to 1.060 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] : 20.6617 ( )
R^2/D10^2 : 0.548484 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 131.25 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.67e-08 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.454e-08 4.035e-09
25- 50 2.266e-07 1.435e-08
50-150 7.200e-07 5.220e-08
15-150 9.912e-07 5.340e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 51.3696 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared 164.63 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 2.19e-12 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.279e-07 6.200e-09
25- 50 2.461e-07 1.260e-08
50-150 5.397e-07 2.830e-08
15-150 9.136e-07 4.375e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.75168 (-2.23294 2.64891)
R1^2/D10^2 : 3.29747 (-1.43756 3.43465)
kT2 [keV] : 35.4718 (-6.99081 18.5493)
R2^2/D10^2 : 7.71722E-02 (-0.0557774 0.0883671)
------------------------------------------------------------
#Fit statistic : Chi-Squared 60.39 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 2.87e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.691e-08 1.518e-08
25- 50 2.413e-07 3.690e-08
50-150 8.047e-07 2.084e-07
15-150 1.123e-06 2.254e-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: 1.15265 ( -0.0453289 0.0451195 )
Norm@50keV : 4.34047E-02 ( -0.00112614 0.00112484 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 49.22 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 7.58e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 11.28 sec: 5.06347 ( -0.139578 0.139836 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.03619e-06 ( -1.3385e-07 1.33929e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.804206 ( -0.192661 0.184759 )
Epeak [keV] : 206.108 ( -51.9636 155.505 )
Norm@50keV : 6.10281E-02 ( -0.00985532 0.0122218 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 38.52 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 9.64e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 11.28 sec: 4.97158 ( -0.14647 0.14705 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.98102e-06 ( -1.39195e-07 1.38665e-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) = 1.03e-06
S(50-100 keV) = 1.85e-06
T90 vs. Hardness ratio plot
T90 = 9.58399999141693 sec.
Hardness ratio (energy fluence ratio) = 1.79612
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.80774
Count Ratio (50-100 keV) / (15-25 keV) = 1.86081
Mask shadow pattern
IMX = 1.742709268112860E-01, IMY = 6.193628922500809E-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:
-85.179400 -1.772000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
255.9565 -37.8754 6.7 43.8 26.9 0.5283 1.7 2.4 4U 1700-377
256.6263 -36.3674 40.6 44.6 29.0 -0.0867 -0.3 9.8 GX 349+2
264.7453 -44.3197 11.6 34.6 26.5 0.2082 1.0 7.8 4U 1735-44
270.4869 -25.5927 0.0 45.5 51.6 1.0659 1.8 13.4 GRS 1758-258
276.0613 -30.3357 3.8 38.7 53.6 1.0237 3.0 7.3 H1820-303
284.9903 -24.8264 13.0 39.3 68.9 0.4689 0.9 6.2 HT1900.1-2455
262.8614 -33.7262 26.4 43.1 37.0 0.1399 0.4 9.1 GX 354-0
0.4253 -21.4657 4.1 47.2 179.1 0.9134 2.9 ------ UNKNOWN
10.6005 -21.8004 2.7 52.0 -170.2 1.7551 4.3 ------ UNKNOWN
206.4128 -55.7606 2.1 54.7 -21.0 2.6662 5.5 ------ UNKNOWN
46.8424 -81.2270 2.3 34.5 -76.8 1.3175 5.0 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-1.772000 9.504000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
255.9802 -37.8648 64.7 43.8 26.9 -0.0262 -0.2 1.3 4U 1700-377
256.5316 -36.4137 12.0 44.6 28.8 -0.1424 -1.0 4.7 GX 349+2
264.9342 -44.3392 33.0 34.5 26.6 0.0349 0.3 10.6 4U 1735-44
270.1955 -25.8419 26.8 45.4 51.1 0.1054 0.4 8.3 GRS 1758-258
276.0276 -30.2203 213.0 38.9 53.7 0.0076 0.1 10.3 H1820-303
285.0231 -24.9863 4.7 39.1 68.8 0.4502 2.5 4.0 HT1900.1-2455
262.8978 -33.7048 636.9 43.1 37.0 -0.0025 -0.0 9.0 GX 354-0
334.1989 -11.5199 2.8 46.8 141.9 0.8058 4.1 ------ UNKNOWN
227.0116 -56.5510 2.5 46.0 -11.2 0.5756 4.6 ------ UNKNOWN
35.4579 -82.7864 0.3 32.8 -74.3 7.2480 42.7 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
205.220600 588.020600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
255.9943 -37.7403 5.5 50.4 20.5 2.2025 2.1 6.2 4U 1700-377
256.4337 -36.3238 5.9 51.0 22.2 2.3766 1.9 6.0 GX 349+2
264.6964 -44.3461 3.7 41.3 18.0 2.5759 3.1 6.5 4U 1735-44
276.0942 -30.2838 3.7 42.4 43.1 -3.8880 -3.1 10.1 H1820-303
285.1761 -25.0264 19.2 40.5 57.4 0.9114 0.6 9.9 HT1900.1-2455
262.8781 -33.9485 6.2 48.5 28.9 1.9939 1.9 8.8 GX 354-0
4.5282 -14.1958 4.1 47.2 179.1 3.3569 2.8 ------ UNKNOWN
232.2270 -57.1338 2.9 51.9 -11.6 4.2470 3.9 ------ UNKNOWN
25.3744 -75.7536 2.9 34.4 -76.9 3.6564 4.1 ------ UNKNOWN
Plot creation:
Sun Mar 1 23:35:16 EST 2026