batgrbproduct analysis for trigger=1430212
batgrbproduct Analysis for Trigger=1430212
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 10:39:05 EST 2026
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1430212/batgroup_hand_proc
======================================================================
Trigger: 01430212 Segment: 000
BAT Trigger Time: 789197859.84 [s; MET]
Trigger Stop: 789197860.864 [s; MET]
UTC: 2026-01-04T05:37:02.859240 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 337.415153163641 Dec: -21.2804821021735 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.63
Image Trigger?: NO
Rate S/N Ratio: 15.6204993518133 [ if not an image trigger ]
Image S/N Ratio: 8.63
Flight Position: [ source = BAT ]
RA: 337.415153163641 Dec: -21.2804821021735 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 337.395125325872 Dec: -21.2909704024706 [deg; J2000]
{ 22h 29m 34.8s , -21d 17' 27.5" }
+/- 1.57200690081803 [arcmin] (estimated 90% radius based on SNR)
+/- 0.601087223374729 [arcmin] (formal 1-sigma fit error)
SNR: 15.9392971946557
Angular difference between Flight and Ground position is 1.284419 arcmin
Partial Coding Fraction: 0.9921875 [ including projection effects ]
Duration
T90: 13.2599999904633 +/- 2.64788901630707
Measured from: -8.94800007343292
to: 4.31199991703033 [s; relative to TRIGTIME]
T50: 5.43999993801117 +/- 1.25385801944942
Measured from: -3.73600006103516
to: 1.70399987697601 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.23199999332428
to: 0.76800000667572 [s; relative to TRIGTIME]
Total Fluence
Measured from: -10.0920000076294
to: 5.22399997711182 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.264143 0.337508 0.139337 0.042669
0.024365 0.025524 0.021206 0.017797 [error]
Peak 0.042881 0.067256 0.045065 0.013339
0.006784 0.007418 0.006140 0.004817 [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 8.05e-08 1.19e-07 1.32e-07 2.76e-07 4.16e-07 6.08e-07 erg/cm2
Error 1.05e-08 1.13e-08 1.97e-08 8.01e-08 4.69e-08 1.02e-07 erg/cm2
Peak flux Power-law 4.18e-01 4.32e-01 3.15e-01 3.69e-01 1.31e+00 1.53e+00 ph/cm2/s
Error 8.52e-02 5.71e-02 4.86e-02 1.12e-01 1.65e-01 1.95e-01 ph/cm2/s
Fluence Cutoff-PL 7.41e-08 1.43e-07 1.13e-07 2.76e-08 3.53e-07 3.58e-07 erg/cm2
Error 1.17e-08 1.80e-08 3.05e-08 4.70e-08 5.31e-08 6.86e-08 erg/cm2
Peak flux Cutoff-PL 3.73e-01 4.81e-01 3.32e-01 1.38e-01 1.28e+00 1.32e+00 ph/cm2/s
Error 9.74e-02 7.90e-02 5.63e-02 1.65e-01 1.69e-01 2.25e-01 ph/cm2/s
Fluence Band 7.14e-08 1.47e-07 1.11e-07 1.27e-07 3.80e-07 4.58e-07 erg/cm2
Error 1.31e-08 1.84e-08 2.42e-08 8.22e-08 4.95e-08 1.03e-07 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 1.853 0.160 - - 2.95e-03 3.30e-04 76.810 57
CPL 0.319 1.080 42.5 8.8 2.50e-02 7.57e-02 67.040 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.455 0.199 - - 1.06e-02 1.35e-03 59.750 57
CPL 0.567 1.041 75.5 1136.7 3.19e-02 6.87e-02 56.970 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: 5.184000 sec.
T50 in the 50-300 keV band: 3.328000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 15.316 -10.092 5.224
T90 13.260 -8.948 4.312
T50 5.440 -3.736 1.704
Peak 1.000 -0.232 0.768
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
337.3951 -21.2910 0.0120 17.7 -2.4 0.8249 15.9 TRIG_01430212
------------------------------------------
Foreground time interval of the image:
-10.092 5.224 (delta_t = 15.316 [sec])
Background time interval of the image:
-148.339 -10.092 (delta_t = 138.247 [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 -10.092 sec. to 5.224 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.85296 ( -0.157502 0.162957 )
Norm@50keV : 2.95160E-03 ( -0.00033212 0.000327687 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 76.81 using 59 PHA bins.
# Reduced chi-squared = 1.348 for 57 degrees of freedom
# Null hypothesis probability = 4.125125e-02
Photon flux (15-150 keV) in 15.32 sec: 0.415378 ( -0.0391922 0.0391968 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.15762e-07 ( -4.64579e-08 4.72685e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -10.092 sec. to 5.224 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.319172 ( -1.24582 0.914035 )
Epeak [keV] : 42.5044 ( -6.08223 11.462 )
Norm@50keV : 2.50301E-02 ( -0.0250747 0.126246 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.04 using 59 PHA bins.
# Reduced chi-squared = 1.197 for 56 degrees of freedom
# Null hypothesis probability = 1.482537e-01
Photon flux (15-150 keV) in 15.32 sec: 0.398014 ( -0.040083 0.04023 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.52993e-07 ( -5.02925e-08 5.59548e-08 ) ergs/cm2
Band function
Time interval is from -10.092 sec. to 5.224 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 2.88268 ( -1.76856 -1.75863 )
beta : -2.47241 ( -0.632661 0.397031 )
Epeak [keV] : 31.4093 ( -5.22499 6.71818 )
Norm@50keV : 4.76225 ( -4.75842 71.9278 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.28 using 59 PHA bins.
# Reduced chi-squared = 1.096 for 55 degrees of freedom
# Null hypothesis probability = 2.907176e-01
Photon flux (15-150 keV) in 15.32 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.80161e-07 ( -3.80054e-07 -4.86487e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.77838 (-0.911317 1.03115)
R^2/D10^2 : 0.223180 (-0.0714988 0.101423)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.04 using 59 PHA bins.
# Reduced chi-squared = 1.281 for 57 degrees of freedom
# Null hypothesis probability = 7.468643e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.605e-08 1.056e-08
25- 50 1.590e-07 1.897e-08
50-150 7.776e-08 1.940e-08
15-150 3.028e-07 3.393e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 76.5302 (-19.5404 32.1312)
Norm : 2.01087 (-0.269226 0.317577)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.969e-08 1.063e-08
25- 50 1.298e-07 1.314e-08
50-150 1.777e-07 6.660e-08
15-150 3.871e-07 6.595e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.15715 (-1.37633 1.30899)
R1^2/D10^2 : 0.381339 (-0.143774 0.283038)
kT2 [keV] : 33.9207 (-15.989 -33.9993)
R2^2/D10^2 : 1.09096E-03 (-0.00107982 0.0106219)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.407e-08 1.724e-08
25- 50 1.470e-07 3.877e-08
50-150 1.740e-07 8.717e-08
15-150 3.951e-07 1.164e-07
Peak spectrum fit
Power-law model
Time interval is from -0.232 sec. to 0.768 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.45523 ( -0.198622 0.198969 )
Norm@50keV : 1.06054E-02 ( -0.00134892 0.00134274 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.75 using 59 PHA bins.
# Reduced chi-squared = 1.048 for 57 degrees of freedom
# Null hypothesis probability = 3.760859e-01
Photon flux (15-150 keV) in 1 sec: 1.30867 ( -0.164854 0.165016 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.01389e-07 ( -1.40062e-08 1.41456e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.232 sec. to 0.768 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.567313 ( -1.18093 0.900766 )
Epeak [keV] : 75.4646 ( -21.3461 2252.1 )
Norm@50keV : 3.19201E-02 ( -0.0319262 0.105463 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.97 using 59 PHA bins.
# Reduced chi-squared = 1.017 for 56 degrees of freedom
# Null hypothesis probability = 4.388270e-01
Photon flux (15-150 keV) in 1 sec: 1.27991 ( -0.16888 0.1683 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.43833e-08 ( -1.58433e-08 1.60587e-08 ) ergs/cm2
Band function
Time interval is from -0.232 sec. to 0.768 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.26143 ( -9.48408 -4.26142 )
beta : -1.76821 ( -0.450121 0.320529 )
Epeak [keV] : 31.9253 ( -7.41737 40.9096 )
Norm@50keV : 89.6739 ( -89.6774 39.2157 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.01 using 59 PHA bins.
# Reduced chi-squared = 0.9821 for 55 degrees of freedom
# Null hypothesis probability = 5.123118e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 9.76196e-08 ( -9.76126e-08 -1.45292e-08 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.7689 (-1.78291 2.13643)
R^2/D10^2 : 0.212261 (-0.0862052 0.136084)
(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 8.513e-09 1.979e-09
25- 50 3.114e-08 4.955e-09
50-150 3.853e-08 9.695e-09
15-150 7.818e-08 1.267e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-73.4095 -199.363)
Norm : 5.42127 (-0.670134 0.670123)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.350e-08 7.550e-09
25- 50 2.597e-08 1.422e-08
50-150 5.695e-08 3.183e-08
15-150 9.642e-08 5.360e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 10.3548 (-3.0239 2.34337)
R1^2/D10^2 : 0.470325 (-0.189983 0.546724)
kT2 [keV] : 52.7513 (-61.5714 -85.1247)
R2^2/D10^2 : 1.45753E-03 (-0.000373341 0.0147264)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.081e-08 4.341e-09
25- 50 3.020e-08 1.302e-08
50-150 5.555e-08 2.971e-08
15-150 9.657e-08 4.287e-08
Plot creation:
Thu Jan 8 10:46:31 EST 2026