batgrbproduct analysis for trigger=1443066
batgrbproduct Analysis for Trigger=1443066
Analysis Summary
Notes:
- 1) No attempt has been made to eliminate the non-significant decimal places.
- 2) This batgrbproduct analysis is done of the amount of data for this trigger downloaded to date.
- 3) This batgrbproduct analysis is using the flight position for the mask-weighting calculation.
- 4) This page will be updated for up to 15 downlinks after the trigger.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.48
Process Start Time (local time): Fri Jan 23 18:15:32 EST 2026
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1443066/batgroup_hand_proc
======================================================================
Trigger: 01443066 Segment: 000
BAT Trigger Time: 790816427.136 [s; MET]
Trigger Stop: 790816431.232 [s; MET]
UTC: 2026-01-22T23:13:10.045840 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 336.078646777855 Dec: -59.1675773421642 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.35
Image Trigger?: NO
Rate S/N Ratio: 11.4455231422596 [ if not an image trigger ]
Image S/N Ratio: 9.35
Flight Position: [ source = BAT ]
RA: 336.078646777855 Dec: -59.1675773421642 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 336.095559608605 Dec: -59.1755697135343 [deg; J2000]
{ 22h 24m 22.9s , -59d 10' 32.1" }
+/- 1.59035344907967 [arcmin] (estimated 90% radius based on SNR)
+/- 0.53618252069196 [arcmin] (formal 1-sigma fit error)
SNR: 15.677265065027
Angular difference between Flight and Ground position is 0.707390 arcmin
Partial Coding Fraction: 0.5703125 [ including projection effects ]
Duration
T90: 16.5920000076294 +/- 3.89235149852433
Measured from: 1.11199998855591
to: 17.7039999961853 [s; relative to TRIGTIME]
T50: 6.36800003051758 +/- 1.50178559411892
Measured from: 4.05599999427795
to: 10.4240000247955 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 8.45999991893768
to: 9.45999991893768 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.23199999332428
to: 19.5119999647141 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.413956 0.527750 0.465906 0.155835
0.045660 0.054425 0.043979 0.047083 [error]
Peak 0.049457 0.072513 0.058384 0.013593
0.010974 0.013136 0.010309 0.011279 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
=== Fluence/Peak Flux Summary ===
Model Band1 Band2 Band3 Band4 Band5 Total
15-25 25-50 50-100 100-350 15-150 15-350 keV
Fluence Power-law 1.13e-07 2.29e-07 3.62e-07 1.27e-06 1.01e-06 1.97e-06 erg/cm2
Error 1.99e-08 2.45e-08 4.48e-08 3.42e-07 1.11e-07 3.74e-07 erg/cm2
Peak flux Power-law 4.63e-01 5.22e-01 4.22e-01 5.66e-01 1.61e+00 1.97e+00 ph/cm2/s
Error 1.44e-01 1.03e-01 8.65e-02 2.37e-01 2.90e-01 3.57e-01 ph/cm2/s
Fluence Cutoff-PL 1.10e-07 2.34e-07 3.68e-07 9.40e-07 9.93e-07 1.65e-06 erg/cm2
Error 2.26e-08 2.91e-08 4.85e-08 6.55e-07 1.20e-07 6.23e-07 erg/cm2
Peak flux Cutoff-PL 3.95e-01 5.63e-01 4.57e-01 2.57e-01 1.57e+00 1.67e+00 ph/cm2/s
Error 1.71e-01 1.25e-01 1.03e-01 2.75e-01 2.98e-01 3.13e-01 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band -------- -------- -------- -------- -------- -------- ph/cm2/s
Error -------- -------- -------- -------- -------- -------- ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.340 0.170 - - 5.34e-03 5.29e-04 66.930 57
CPL 1.150 0.509 227.8 0.0 6.65e-03 4.98e-03 66.650 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.309 0.288 - - 1.35e-02 2.37e-03 49.780 57
CPL 0.486 1.229 95.4 -30.7 3.44e-02 8.67e-02 48.290 56
Model : spectral model: simple power-law (PL) and cutoff power-law (CPL)
Ph_index : photon index: E^-{Ph_index} (minus sign is not included in the index)
Ph_90err : 90% error of the photon index
Epeak : Epeak in keV
Epeak_90err: 90% error of Epeak
Norm : normalization at 50 keV in PL model and at 1 keV in CPL model
Nomr_90err : 90% error of the normalization
chi2 : Chi-Squared
dof : degree of freedom
=== T90/T50 calculation in the 50-300 keV band (BATSE band) using 64 ms lc ===
T90 in the 50-300 keV band: 7.616000 sec.
T50 in the 50-300 keV band: 4.032000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 19.280 0.232 19.512
T90 16.592 1.112 17.704
T50 6.368 4.056 10.424
Peak 1.000 8.460 9.460
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
336.0956 -59.1756 0.0122 28.2 -123.0 1.7829 15.7 TRIG_01443066
------------------------------------------
Foreground time interval of the image:
0.232 19.512 (delta_t = 19.280 [sec])
Background time interval of the image:
-60.136 0.232 (delta_t = 60.368 [sec])
Lightcurves
Notes:
- 1) All plots contain as much data as has been downloaded to date.
- 2) The mask-weighted light curves are using the flight position.
- 3) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 4) 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.
- 5) 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.
- 6) 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
8 ms binning
From T100_start-3 s to T100_start+3 s
2 ms binning
From T100_start-1 s to T100_start+1 s
SN=5 or 10 sec. binning (whichever binning is satisfied first)
SN=5 or 10 sec. binning (T < 200 sec)
Spectra
Notes:
- 1) The fitting includes the systematic errors.
- 2) For long bursts, a spectral fit of 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.
- 4) For short bursts (T90<1sec), the specrtum is also fit with Blackbody, OTTB, and Double Blackbody.
Time averaged spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 0.232 sec. to 19.512 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.34048 ( -0.170984 0.1691 )
Norm@50keV : 5.33500E-03 ( -0.000529519 0.00052791 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.93 using 59 PHA bins.
# Reduced chi-squared = 1.174 for 57 degrees of freedom
# Null hypothesis probability = 1.728743e-01
Photon flux (15-150 keV) in 19.28 sec: 0.641471 ( -0.0645566 0.0646249 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.00677e-06 ( -1.10851e-07 1.11743e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.232 sec. to 19.512 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.15043 ( -0.676537 0.340506 )
Epeak [keV] : 227.750 ( -227.813 -227.813 )
Norm@50keV : 6.64927E-03 ( -0.00244615 0.00751746 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.65 using 59 PHA bins.
# Reduced chi-squared = 1.190 for 56 degrees of freedom
# Null hypothesis probability = 1.560253e-01
Photon flux (15-150 keV) in 19.28 sec: 0.636935 ( -0.065757 0.066119 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.93344e-07 ( -1.19949e-07 1.19594e-07 ) ergs/cm2
Band function
Time interval is from 0.232 sec. to 19.512 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.95897 ( -4.95897 -4.95897 )
beta : -1.38713 ( -0.216584 0.184732 )
Epeak [keV] : 22.8568 ( -22.8568 6.58656 )
Norm@50keV : 793.512 ( -77.8907 1.97385e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.30 using 59 PHA bins.
# Reduced chi-squared = 1.206 for 55 degrees of freedom
# Null hypothesis probability = 1.413650e-01
Photon flux (15-150 keV) in 19.28 sec: 0.637048 ( ) 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] : 16.9178 (-2.19349 2.65065)
R^2/D10^2 : 4.93409E-02 (-0.0193888 0.0306061)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 92.44 using 59 PHA bins.
# Reduced chi-squared = 1.622 for 57 degrees of freedom
# Null hypothesis probability = 2.072242e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.552e-08 1.173e-08
25- 50 2.447e-07 3.958e-08
50-150 4.993e-07 9.582e-08
15-150 7.996e-07 1.049e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-37.2742 -200)
Norm : 2.65505 (-0.262784 0.262784)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.275e-07 3.124e-08
25- 50 2.452e-07 1.146e-07
50-150 5.379e-07 2.911e-07
15-150 9.106e-07 4.956e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.76709 (-1.85438 2.27146)
R1^2/D10^2 : 0.683748 (-0.418871 1.48622)
kT2 [keV] : 28.0770 (-6.23689 12.5914)
R2^2/D10^2 : 7.53229E-03 (-0.00521694 0.0104657)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.121e-07 5.732e-08
25- 50 2.316e-07 9.312e-08
50-150 6.543e-07 3.323e-07
15-150 9.980e-07 4.126e-07
Peak spectrum fit
Power-law model
Time interval is from 8.460 sec. to 9.460 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.30912 ( -0.291633 0.284619 )
Norm@50keV : 1.35120E-02 ( -0.00237257 0.00236646 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.78 using 59 PHA bins.
# Reduced chi-squared = 0.8734 for 57 degrees of freedom
# Null hypothesis probability = 7.400839e-01
Photon flux (15-150 keV) in 1 sec: 1.61476 ( -0.289249 0.289911 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.33227e-07 ( -2.54834e-08 2.57826e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 8.460 sec. to 9.460 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.485550 ( -1.50502 0.953863 )
Epeak [keV] : 95.3920 ( -33.9569 -95.391 )
Norm@50keV : 3.43900E-02 ( -0.0343906 0.139032 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.29 using 59 PHA bins.
# Reduced chi-squared = 0.8623 for 56 degrees of freedom
# Null hypothesis probability = 7.583781e-01
Photon flux (15-150 keV) in 1 sec: 1.57272 ( -0.2992 0.29722 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.27095e-07 ( -2.6493e-08 2.7191e-08 ) ergs/cm2
Band function
Time interval is from 8.460 sec. to 9.460 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.503071 ( -0.520589 1.87212 )
beta : -10.0000 ( 10 20 )
Epeak [keV] : 96.5898 ( -34.8227 244.731 )
Norm@50keV : 3.36520E-02 ( -0.0336525 0.140287 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.29 using 59 PHA bins.
# Reduced chi-squared = 0.8780 for 55 degrees of freedom
# Null hypothesis probability = 7.268799e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.30166e-07 ( 0 0 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 17.2638 (-3.21746 4.32897)
R^2/D10^2 : 0.121814 (-0.0659023 0.128496)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.362e-09 2.909e-09
25- 50 3.297e-08 1.032e-08
50-150 7.050e-08 2.291e-08
15-150 1.108e-07 2.952e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-70.9955 -200)
Norm : 6.73104 (-1.18422 1.18422)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.676e-08 9.780e-09
25- 50 3.224e-08 1.840e-08
50-150 7.072e-08 4.050e-08
15-150 1.197e-07 6.765e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.05778 (-5.72979 7.91762)
R1^2/D10^2 : 1.11494 (-0.965579 5502.74)
kT2 [keV] : 23.5767 (-7.81826 66.4686)
R2^2/D10^2 : 3.52182E-02 (-0.0341572 0.12421)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.250e-08 7.830e-09
25- 50 3.180e-08 1.638e-08
50-150 8.208e-08 4.727e-08
15-150 1.264e-07 6.635e-08
Plot creation:
Fri Jan 23 18:21:21 EST 2026