batgrbproduct analysis for trigger=1429608
batgrbproduct Analysis for Trigger=1429608
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 Jan 8 10:27:29 EST 2026
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1429608/batgroup_hand_proc
======================================================================
Trigger: 01429608 Segment: 000
BAT Trigger Time: 788921827.264 [s; MET]
Trigger Stop: 788921827.776 [s; MET]
UTC: 2026-01-01T00:56:30.301900 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 86.4645828560466 Dec: 63.5683887343817 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.02
Image Trigger?: NO
Rate S/N Ratio: 13.3416640641263 [ if not an image trigger ]
Image S/N Ratio: 8.02
Flight Position: [ source = BAT ]
RA: 86.4645828560466 Dec: 63.5683887343817 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 86.4423023275964 Dec: 63.5825601287919 [deg; J2000]
{ 05h 45m 46.2s , +63d 34' 57.2" }
+/- 1.05088290540851 [arcmin] (estimated 90% radius based on SNR)
+/- 0.346723680927093 [arcmin] (formal 1-sigma fit error)
SNR: 28.3352131269656
Angular difference between Flight and Ground position is 1.037741 arcmin
Partial Coding Fraction: 0.78125 [ including projection effects ]
Duration
T90: 48 +/- 16
Measured from: -15.2640000581741
to: 32.7359999418259 [s; relative to TRIGTIME]
T50: 16 +/- 16
Measured from: 0.735999941825867
to: 16.7359999418259 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 24.2359999418259
to: 25.2359999418259 [s; relative to TRIGTIME]
Total Fluence
Measured from: -31.2640000581741
to: 64.7359999418259 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 2.122984 2.940823 1.956879 0.466121
0.065090 0.069287 0.058652 0.045850 [error]
Peak 0.128632 0.220117 0.180264 0.029184
0.009134 0.010531 0.009543 0.006061 [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 7.01e-07 1.20e-06 1.56e-06 4.10e-06 4.58e-06 7.56e-06 erg/cm2
Error 3.96e-08 3.94e-08 6.09e-08 3.56e-07 1.46e-07 3.95e-07 erg/cm2
Peak flux Power-law 1.38e+00 1.50e+00 1.16e+00 1.46e+00 4.59e+00 5.50e+00 ph/cm2/s
Error 1.28e-01 8.83e-02 7.55e-02 1.91e-01 2.53e-01 3.06e-01 ph/cm2/s
Fluence Cutoff-PL 6.54e-07 1.23e-06 1.59e-06 2.55e-06 4.46e-06 6.03e-06 erg/cm2
Error 4.91e-08 4.50e-08 6.61e-08 7.77e-07 1.66e-07 7.89e-07 erg/cm2
Peak flux Cutoff-PL 1.17e+00 1.62e+00 1.26e+00 6.43e-01 4.46e+00 4.69e+00 ph/cm2/s
Error 1.54e-01 1.06e-01 9.12e-02 2.14e-01 2.59e-01 3.32e-01 ph/cm2/s
Fluence Band 6.12e-07 1.26e-06 1.54e-06 3.53e-06 4.45e-06 6.95e-06 erg/cm2
Error 5.79e-08 5.23e-08 6.35e-08 4.89e-07 1.59e-07 5.12e-07 erg/cm2
Peak flux Band 1.18e+00 1.61e+00 1.25e+00 6.99e-01 4.48e+00 4.75e+00 ph/cm2/s
Error -------- -------- 8.82e-02 -------- -------- -------- ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.620 0.056 - - 5.11e-03 1.55e-04 62.070 57
CPL 1.280 0.230 109.2 64.4 7.47e-03 1.91e-03 55.170 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.375 0.087 - - 3.79e-02 2.07e-03 61.700 57
CPL 0.498 0.394 88.6 21.2 1.03e-01 4.66e-02 44.010 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: 28.672000 sec.
T50 in the 50-300 keV band: 19.136000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 96.000 -31.264 64.736
T90 48.000 -15.264 32.736
T50 16.000 0.736 16.736
Peak 1.000 24.236 25.236
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
86.4423 +63.5826 0.0068 21.1 44.2 2.6341 28.3 TRIG_01429608
------------------------------------------
Foreground time interval of the image:
-31.264 10.037 (delta_t = 41.301 [sec])
Background time interval of the image:
-239.264 -31.264 (delta_t = 208.000 [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 -31.264 sec. to 64.736 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.62010 ( -0.0560307 0.0561306 )
Norm@50keV : 5.11085E-03 ( -0.000154986 0.000154884 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.07 using 59 PHA bins.
# Reduced chi-squared = 1.089 for 57 degrees of freedom
# Null hypothesis probability = 3.003834e-01
Photon flux (15-150 keV) in 96 sec: 0.660920 ( -0.021523 0.0215811 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.57775e-06 ( -1.46093e-07 1.46393e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -31.264 sec. to 64.736 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.27992 ( -0.236208 0.223968 )
Epeak [keV] : 109.247 ( -25.0916 103.697 )
Norm@50keV : 7.47099E-03 ( -0.00161338 0.00219789 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.17 using 59 PHA bins.
# Reduced chi-squared = 0.9852 for 56 degrees of freedom
# Null hypothesis probability = 5.061809e-01
Photon flux (15-150 keV) in 96 sec: 0.645571 ( -0.023511 0.023575 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.45992e-06 ( -1.66579e-07 1.65821e-07 ) ergs/cm2
Band function
Time interval is from -31.264 sec. to 64.736 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.667139 ( -0.58999 3.24997 )
beta : -1.76427 ( -0.157334 0.10548 )
Epeak [keV] : 54.3206 ( -25.1258 41.2638 )
Norm@50keV : 1.80876E-02 ( -0.0112221 4.89573 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.39 using 59 PHA bins.
# Reduced chi-squared = 0.9344 for 55 degrees of freedom
# Null hypothesis probability = 6.132467e-01
Photon flux (15-150 keV) in 96 sec: 0.636848 ( 6.36315 -0.024691 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.45387e-06 ( -4.4532e-06 -1.58486e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 14.6911 ( )
R^2/D10^2 : 7.59682E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 270.32 using 59 PHA bins.
# Reduced chi-squared = 4.7425 for 57 degrees of freedom
# Null hypothesis probability = 1.729993e-29
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.306e-07 1.925e-08
25- 50 1.288e-06 5.376e-08
50-150 1.875e-06 1.200e-07
15-150 3.493e-06 1.147e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 173.907 (-26.0438 -173.776)
Norm : 2.67671 (-0.0946741 0.101127)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.505e-07 3.643e-08
25- 50 1.231e-06 8.544e-08
50-150 2.573e-06 6.374e-07
15-150 4.454e-06 7.229e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.93482 (-0.803565 0.829939)
R1^2/D10^2 : 0.467966 (-0.12693 0.196253)
kT2 [keV] : 28.3651 (-3.49072 4.92757)
R2^2/D10^2 : 5.41194E-03 (-0.00233909 0.00343062)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.760e-07 5.410e-08
25- 50 1.285e-06 8.592e-08
50-150 2.586e-06 3.456e-07
15-150 4.447e-06 3.979e-07
Peak spectrum fit
Power-law model
Time interval is from 24.236 sec. to 25.236 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.37522 ( -0.087286 0.0875076 )
Norm@50keV : 3.78693E-02 ( -0.00206714 0.00206515 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.70 using 59 PHA bins.
# Reduced chi-squared = 1.083 for 57 degrees of freedom
# Null hypothesis probability = 3.117050e-01
Photon flux (15-150 keV) in 1 sec: 4.58650 ( -0.252576 0.252758 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.67821e-07 ( -2.20902e-08 2.21754e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 24.236 sec. to 25.236 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.497606 ( -0.411433 0.376098 )
Epeak [keV] : 88.6178 ( -13.7589 28.6086 )
Norm@50keV : 0.102562 ( -0.0348071 0.0583926 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.01 using 59 PHA bins.
# Reduced chi-squared = 0.7859 for 56 degrees of freedom
# Null hypothesis probability = 8.773253e-01
Photon flux (15-150 keV) in 1 sec: 4.45579 ( -0.25897 0.25892 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.50768e-07 ( -2.354e-08 2.3595e-08 ) ergs/cm2
Band function
Time interval is from 24.236 sec. to 25.236 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.497568 ( -0.306596 0.378732 )
beta : -10.0000 ( 10 3.55271e-15 )
Epeak [keV] : 88.6032 ( -10.0044 28.5836 )
Norm@50keV : 0.102567 ( -0.034803 0.0584466 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.01 using 59 PHA bins.
# Reduced chi-squared = 0.8001 for 55 degrees of freedom
# Null hypothesis probability = 8.560255e-01
Photon flux (15-150 keV) in 1 sec: 4.47697 ( ) 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] : 16.5644 (-1.04996 1.12665)
R^2/D10^2 : 0.394560 (-0.0799756 0.0995267)
(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 2.220e-08 2.235e-09
25- 50 9.618e-08 6.900e-09
50-150 1.868e-07 1.895e-08
15-150 3.052e-07 1.880e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-16.2868 -200)
Norm : 19.0446 (-1.02888 1.02888)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.743e-08 2.670e-09
25- 50 9.123e-08 5.835e-09
50-150 2.001e-07 3.435e-08
15-150 3.387e-07 3.950e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.79845 (-1.36947 1.74832)
R1^2/D10^2 : 3.85236 (-1.93413 4.3889)
kT2 [keV] : 22.7813 (-2.68189 4.06369)
R2^2/D10^2 : 0.108912 (-0.0519383 0.0684089)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.801e-08 9.140e-09
25- 50 9.138e-08 2.138e-08
50-150 2.207e-07 4.620e-08
15-150 3.501e-07 5.840e-08
Plot creation:
Thu Jan 8 10:38:03 EST 2026