batgrbproduct analysis for trigger=1417793
batgrbproduct Analysis for Trigger=1417793
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): Thu Nov 27 17:25:16 EST 2025
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1417793/GCN5_download_cron
======================================================================
Trigger: 01417793 Segment: 000
BAT Trigger Time: 785877073.408 [s; MET]
Trigger Stop: 785877074.432 [s; MET]
UTC: 2025-11-26T19:10:36.651740 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 99.910589438464 Dec: 54.9869505481003 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 12.31
Image Trigger?: NO
Rate S/N Ratio: 23.6220236220354 [ if not an image trigger ]
Image S/N Ratio: 12.31
Flight Position: [ source = BAT ]
RA: 99.910589438464 Dec: 54.9869505481003 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 99.9389909592308 Dec: 54.9894190548697 [deg; J2000]
{ 06h 39m 45.4s , +54d 59' 21.9" }
+/- 1.25094928583142 [arcmin] (estimated 90% radius based on SNR)
+/- 0.506571559175492 [arcmin] (formal 1-sigma fit error)
SNR: 22.0904477079381
Angular difference between Flight and Ground position is 0.988869 arcmin
Partial Coding Fraction: 0.96875 [ including projection effects ]
Duration
T90: 9 +/- 2
Measured from: -0.407999873161316
to: 8.59200012683868 [s; relative to TRIGTIME]
T50: 4 +/- 1
Measured from: 0.592000126838684
to: 4.59200012683868 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.592000007629395
to: 1.59200000762939 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.407999992370605
to: 10.5920000076294 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.263243 0.389890 0.190021 0.037301
0.020588 0.021334 0.017515 0.013198 [error]
Peak 0.044660 0.063463 0.041116 0.016100
0.006688 0.006968 0.005794 0.004295 [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 8.70e-08 1.36e-07 1.61e-07 3.69e-07 4.92e-07 7.54e-07 erg/cm2
Error 9.18e-09 9.57e-09 1.65e-08 7.61e-08 3.94e-08 9.24e-08 erg/cm2
Peak flux Power-law 4.55e-01 4.37e-01 2.92e-01 3.04e-01 1.31e+00 1.49e+00 ph/cm2/s
Error 9.12e-02 5.47e-02 4.79e-02 1.01e-01 1.59e-01 1.83e-01 ph/cm2/s
Fluence Cutoff-PL 7.55e-08 1.58e-07 1.57e-07 6.28e-08 4.37e-07 4.53e-07 erg/cm2
Error 1.07e-08 1.42e-08 2.11e-08 5.20e-08 4.48e-08 6.72e-08 erg/cm2
Peak flux Cutoff-PL 4.55e-01 4.37e-01 2.92e-01 3.02e-01 1.31e+00 1.49e+00 ph/cm2/s
Error 6.98e-02 5.88e-02 4.84e-02 1.50e-01 1.59e-01 2.16e-01 ph/cm2/s
Fluence Band 7.17e-08 1.64e-07 1.48e-07 1.68e-07 4.51e-07 5.53e-07 erg/cm2
Error 8.47e-09 1.49e-08 1.98e-08 -------- 4.34e-08 1.08e-07 erg/cm2
Peak flux Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
Error -------- 3.42e-02 2.56e-02 -------- 5.54e-02 -------- ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.760 0.119 - - 4.85e-03 3.75e-04 72.990 57
CPL 0.430 0.707 51.4 8.8 2.68e-02 3.04e-02 58.430 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.581 0.214 - - 1.02e-02 1.31e-03 51.730 57
CPL 1.583 0.223 9999.3 0.0 1.02e-02 1.16e-02 51.740 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: 9.472000 sec.
T50 in the 50-300 keV band: 3.968000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 11.000 -0.408 10.592
T90 9.000 -0.408 8.592
T50 4.000 0.592 4.592
Peak 1.000 0.592 1.592
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
99.9390 +54.9894 0.0087 17.6 -32.8 0.8316 22.1 TRIG_01417793
------------------------------------------
Foreground time interval of the image:
-0.408 9.393 (delta_t = 9.801 [sec])
Background time interval of the image:
-239.408 -46.588 (delta_t = 192.820 [sec])
-44.408 -33.508 (delta_t = 10.900 [sec])
-32.408 -0.408 (delta_t = 32.000 [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 -0.408 sec. to 10.592 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.75983 ( -0.118077 0.12051 )
Norm@50keV : 4.85053E-03 ( -0.000376233 0.000373058 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.99 using 59 PHA bins.
# Reduced chi-squared = 1.281 for 57 degrees of freedom
# Null hypothesis probability = 7.520419e-02
Photon flux (15-150 keV) in 11 sec: 0.658265 ( -0.0465254 0.046556 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.92074e-07 ( -3.92282e-08 3.959e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.408 sec. to 10.592 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.430166 ( -0.768939 0.64442 )
Epeak [keV] : 51.3510 ( -6.2895 11.2428 )
Norm@50keV : 2.67733E-02 ( -0.0149836 0.0457166 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.43 using 59 PHA bins.
# Reduced chi-squared = 1.043 for 56 degrees of freedom
# Null hypothesis probability = 3.862467e-01
Photon flux (15-150 keV) in 11 sec: 0.626504 ( -0.048776 0.048805 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.3689e-07 ( -4.38284e-08 4.58612e-08 ) ergs/cm2
Band function
Time interval is from -0.408 sec. to 10.592 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.312766 ( -0.879818 3.03204 )
beta : -2.49496 ( -0.841681 0.450393 )
Epeak [keV] : 43.9276 ( -11.2065 9.29377 )
Norm@50keV : 7.95173E-02 ( -0.081756 8.70765 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.63 using 59 PHA bins.
# Reduced chi-squared = 0.9932 for 55 degrees of freedom
# Null hypothesis probability = 4.887754e-01
Photon flux (15-150 keV) in 11 sec: 0.0 ( 7 0 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.50961e-07 ( -4.50884e-07 -4.28736e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 11.5301 (-0.832611 0.911174)
R^2/D10^2 : 0.190806 (-0.0475246 0.0620434)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.68 using 59 PHA bins.
# Reduced chi-squared = 1.275 for 57 degrees of freedom
# Null hypothesis probability = 7.880847e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.876e-08 7.299e-09
25- 50 1.763e-07 1.485e-08
50-150 1.371e-07 2.489e-08
15-150 3.721e-07 2.915e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 100.271 (-22.0937 34.2623)
Norm : 2.93984 (-0.275719 0.309707)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.452e-08 9.729e-09
25- 50 1.462e-07 1.161e-08
50-150 2.373e-07 7.689e-08
15-150 4.681e-07 8.294e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.61775 (-1.83085 1.34771)
R1^2/D10^2 : 0.323346 (-0.10821 0.233298)
kT2 [keV] : 43.2167 (-23.2883 -43.3506)
R2^2/D10^2 : 8.35381E-04 (-0.000781291 0.012889)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.814e-08 1.071e-08
25- 50 1.698e-07 3.190e-08
50-150 2.251e-07 9.909e-08
15-150 4.631e-07 1.273e-07
Peak spectrum fit
Power-law model
Time interval is from 0.592 sec. to 1.592 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.58065 ( -0.212247 0.21639 )
Norm@50keV : 1.02303E-02 ( -0.00131737 0.00129913 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.73 using 59 PHA bins.
# Reduced chi-squared = 0.9076 for 57 degrees of freedom
# Null hypothesis probability = 6.723052e-01
Photon flux (15-150 keV) in 1 sec: 1.30688 ( -0.159259 0.159426 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.59077e-08 ( -1.32914e-08 1.34562e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.592 sec. to 1.592 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.58277 ( -0.230212 0.215037 )
Epeak [keV] : 9999.34 ( -9999.36 -9999.36 )
Norm@50keV : 1.02032E-02 ( -0.00670558 0.0164671 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.74 using 59 PHA bins.
# Reduced chi-squared = 0.9240 for 56 degrees of freedom
# Null hypothesis probability = 6.366898e-01
Photon flux (15-150 keV) in 1 sec: 1.30655 ( -0.15926 0.15928 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.58261e-08 ( -1.39559e-08 1.38439e-08 ) ergs/cm2
Band function
Time interval is from 0.592 sec. to 1.592 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.892652 ( 1.02508 6.0144 )
beta : -1.64900 ( 1.64675 0.268262 )
Epeak [keV] : 50.8629 ( -50.932 -50.932 )
Norm@50keV : 2.91521E-02 ( -0.0298615 0.892328 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.47 using 59 PHA bins.
# Reduced chi-squared = 0.9358 for 55 degrees of freedom
# Null hypothesis probability = 6.102385e-01
Photon flux (15-150 keV) in 1 sec: 0.0 ( 7 0 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 12.7357 (-1.80969 2.18855)
R^2/D10^2 : 0.259929 (-0.113893 0.192844)
(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 8.942e-09 1.937e-09
25- 50 3.012e-08 5.065e-09
50-150 3.051e-08 8.530e-09
15-150 6.956e-08 1.132e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 191.190 (-86.8393 -188.557)
Norm : 5.31896 (-0.652959 0.782506)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.332e-08 7.345e-09
25- 50 2.549e-08 1.379e-08
50-150 5.512e-08 2.973e-08
15-150 9.392e-08 5.165e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.81830 (-0.903497 1.70085)
R1^2/D10^2 : 0.580065 (-0.258313 0.309663)
kT2 [keV] : 200.000 (-200 -200)
R2^2/D10^2 : 1.60345E-04 (-5.00677e-05 4.99753e-05)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.270e-08 7.695e-09
25- 50 2.394e-08 1.326e-08
50-150 4.444e-08 2.597e-08
15-150 8.108e-08 4.357e-08
Plot creation:
Thu Nov 27 17:28:28 EST 2025