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
29.5153 -42.3435 0.0293 37.9761 -14.5892 0.9199883 6.541 TRIG_01294765
Foreground time interval of the image:
-0.916 29.837 (delta_t = 30.753 [sec])
Background time interval of the image:
-119.864 -0.916 (delta_t = 118.948 [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 -0.916 sec. to 231.332 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.82255 ( -0.209404 0.221531 )
Norm@50keV : 7.85626E-04 ( -0.000109854 0.000106766 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 56.90 using 59 bins.
Reduced chi-squared = 0.998246
# Null hypothesis probability of 4.79e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 232.2 sec: 0.109224 ( -0.0122761 0.012278 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.6785e-06 ( -2.33556e-07 2.38938e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.916 sec. to 231.332 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.69231 ( -0.783968 0.513775 )
Epeak [keV] : 105.605 ( -105.697 -105.712 )
Norm@50keV : 9.27914E-04 ( -0.000577673 0.00155418 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 56.80 using 59 bins.
Reduced chi-squared = 1.01429
# Null hypothesis probability of 4.45e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 232.2 sec: 0.108657 ( -0.0126232 0.012601 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.65704e-06 ( -2.58281e-07 2.54586e-07 ) ergs/cm2
Band function
Time interval is from -0.916 sec. to 231.332 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] : 10.7126 (-1.68561 2.09098)
R^2/D10^2 : 3.85763E-02 (-0.0183857 0.0340142)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 81.93 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.69e-02 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.135e-07 4.228e-08
25- 50 5.834e-07 8.708e-08
50-150 3.704e-07 1.098e-07
15-150 1.167e-06 1.961e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 97.9881 (-34.3944 73.8412)
Norm : 0.483339 (-0.0710931 0.0904915)
------------------------------------------------------------
#Fit statistic : Chi-Squared 57.60 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 4.53e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.933e-07 4.528e-08
25- 50 5.051e-07 7.721e-08
50-150 8.091e-07 3.706e-07
15-150 1.607e-06 3.964e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.67581 (-1.44685 1.60059)
R1^2/D10^2 : 0.301522 (-0.181737 0.678858)
kT2 [keV] : 23.0520 (-5.87938 10.4201)
R2^2/D10^2 : 1.82598E-03 (-0.0013286 0.00241569)
------------------------------------------------------------
#Fit statistic : Chi-Squared 55.31 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 4.63e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.163e-07 1.554e-07
25- 50 4.644e-07 1.911e-07
50-150 8.970e-07 5.033e-07
15-150 1.678e-06 7.308e-07
Peak spectrum fit
Power-law model
Time interval is from 0.684 sec. to 1.684 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.802057 ( -0.368981 0.335983 )
Norm@50keV : 1.23577E-02 ( -0.00251845 0.00241834 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 50.51 using 59 bins.
Reduced chi-squared = 0.88614
# Null hypothesis probability of 7.16e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 1.42018 ( -0.27398 0.27606 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.44301e-07 ( -2.71462e-08 2.72013e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.684 sec. to 1.684 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.793521 ( -0.408295 0.338828 )
Epeak [keV] : 9999.29 ( -9999.36 -9999.36 )
Norm@50keV : 1.24314E-02 ( -0.00233367 0.025985 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 50.51 using 59 bins.
Reduced chi-squared = 0.901964
# Null hypothesis probability of 6.82e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 1.42493 ( -0.29329 0.28016 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.44261e-07 ( -2.58287e-08 2.72176e-08 ) ergs/cm2
Band function
Time interval is from 0.684 sec. to 1.684 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] : 29.7116 (-6.82564 11.2824)
R^2/D10^2 : 2.15847E-02 (-0.0127959 0.0256054)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 54.99 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 5.51e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.999e-09 1.352e-09
25- 50 1.842e-08 7.035e-09
50-150 1.153e-07 4.453e-08
15-150 1.367e-07 4.720e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-44.4095 -200)
Norm : 5.81893 (-1.14274 1.14274)
------------------------------------------------------------
#Fit statistic : Chi-Squared 64.70 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 2.26e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.450e-08 8.670e-09
25- 50 2.789e-08 1.623e-08
50-150 6.117e-08 3.578e-08
15-150 1.036e-07 6.030e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.99976 (-5.22718 6.04393)
R1^2/D10^2 : 1.66576 (-1.53445 -1.66515)
kT2 [keV] : 37.9770 (-12.2566 33.5922)
R2^2/D10^2 : 1.00475E-02 (-0.00796157 0.0257837)
------------------------------------------------------------
#Fit statistic : Chi-Squared 49.05 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 7.00e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.907e-09 5.860e-09
25- 50 2.097e-08 1.153e-08
50-150 1.173e-07 6.685e-08
15-150 1.482e-07 7.885e-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: 1.22435 ( -0.248467 0.244517 )
Norm@50keV : 2.54934E-03 ( -0.000382499 0.000382497 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 37.51 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 9.78e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 30.75 sec: 0.300308 ( -0.0463677 0.0465193 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.89955e-07 ( -1.28716e-07 1.29926e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 6.78751E-02 ( -1.41712 1.07198 )
Epeak [keV] : 90.3670 ( -24.7793 334.831 )
Norm@50keV : 8.90340E-03 ( -0.0089034 0.0291849 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 34.08 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 9.91e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 30.75 sec: 0.287551 ( -0.047573 0.04812 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.44667e-07 ( -1.36838e-07 1.38553e-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) = 4.76e-07
S(50-100 keV) = 5.39e-07
T90 vs. Hardness ratio plot
T90 = 222.211999893188 sec.
Hardness ratio (energy fluence ratio) = 1.13235
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.45207
Count Ratio (50-100 keV) / (15-25 keV) = 0.933638
Mask shadow pattern
IMX = 7.554453377773364E-01, IMY = 1.966264557379882E-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:
-119.864000 -0.916000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
264.6692 -44.6081 4.9 45.9 133.8 5.1617 2.3 10.0 4U 1735-44
270.4088 -25.7098 8.4 54.2 156.9 2.7407 1.4 6.1 GRS 1758-258
275.8902 -30.3623 5.5 47.4 156.8 3.2419 2.1 1.8 H1820-303
285.1214 -24.9624 6.0 45.3 170.0 -2.2622 -1.9 5.3 HT1900.1-2455
280.7367 -28.3496 3.2 45.7 162.8 4.8355 3.6 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-0.916000 29.836600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
264.7163 -44.5951 4.1 45.9 133.8 -1.2877 -2.9 8.8 4U 1735-44
270.3724 -25.6496 7.9 54.2 156.9 -0.8928 -1.5 6.8 GRS 1758-258
275.8673 -30.5671 14.0 47.3 156.6 -0.2843 -0.8 12.4 H1820-303
285.1909 -24.9523 5.8 45.3 170.1 0.4646 2.0 8.6 HT1900.1-2455
1.4154 -78.8956 2.1 30.4 55.4 0.8361 5.6 ------ UNKNOWN
58.6218 -39.4475 1.7 57.5 -0.4 4.0012 6.9 ------ UNKNOWN
29.5153 -42.3435 1.8 38.0 -14.6 0.9196 6.5 ------ UNKNOWN
347.1655 -26.7116 2.3 25.2 -87.4 0.6846 5.1 ------ UNKNOWN
31.3879 -26.0142 2.0 49.4 -31.9 1.4994 5.8 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
123.036600 962.304800
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
55.4590 -57.8803 3.4 22.5 102.7 5.3601 3.4 ------ UNKNOWN
313.7154 -73.5062 3.2 45.7 162.8 12.1491 3.6 ------ UNKNOWN
59.8069 -10.9916 2.9 41.0 9.2 6.9643 4.0 ------ UNKNOWN
305.2132 -59.2052 2.9 51.9 -179.5 13.4765 4.0 ------ UNKNOWN
357.8685 -57.7075 3.3 25.1 -178.4 4.1151 3.5 ------ UNKNOWN
Plot creation:
Fri Jun 20 01:48:31 EDT 2025