batgrbproduct analysis for trigger=1329888
batgrbproduct Analysis for Trigger=1329888
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 Jul 4 01:34:20 EDT 2025
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1329888/GCN5_download_cron
======================================================================
Trigger: 01329888 Segment: 000
BAT Trigger Time: 773183239.168 [s; MET]
Trigger Stop: 773183240.192 [s; MET]
UTC: 2025-07-02T21:06:43.274520 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 212.93254740976 Dec: 16.69933155287 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.51
Image Trigger?: NO
Rate S/N Ratio: 16.3401346383682 [ if not an image trigger ]
Image S/N Ratio: 8.51
Flight Position: [ source = BAT ]
RA: 212.93254740976 Dec: 16.69933155287 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 212.941953352214 Dec: 16.7390575886437 [deg; J2000]
{ 14h 11m 46.1s , +16d 44' 20.6" }
+/- 1.01593621190449 [arcmin] (estimated 90% radius based on SNR)
+/- 0.391198927844732 [arcmin] (formal 1-sigma fit error)
SNR: 29.7378234805418
Angular difference between Flight and Ground position is 2.444076 arcmin
Partial Coding Fraction: 0.8125 [ including projection effects ]
Duration
T90: 63.675999879837 +/- 12.5011675166856
Measured from: -11.9559998512268
to: 51.7200000286102 [s; relative to TRIGTIME]
T50: 33.2680000066757 +/- 1.15644276579835
Measured from: 5.42800009250641
to: 38.6960000991821 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 37.3519999980927
to: 38.3519999980927 [s; relative to TRIGTIME]
Total Fluence
Measured from: -29.1280000209808
to: 76.444000005722 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 2.106447 2.782808 2.100033 0.660199
0.067433 0.071208 0.061725 0.051629 [error]
Peak 0.130916 0.225655 0.207524 0.086717
0.008566 0.010253 0.010160 0.007884 [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 6.43e-07 1.19e-06 1.70e-06 5.12e-06 4.84e-06 8.65e-06 erg/cm2
Error 4.05e-08 4.23e-08 6.50e-08 4.60e-07 1.57e-07 4.91e-07 erg/cm2
Peak flux Power-law 1.30e+00 1.59e+00 1.42e+00 2.18e+00 5.07e+00 6.49e+00 ph/cm2/s
Error 1.27e-01 9.33e-02 8.25e-02 2.73e-01 2.58e-01 3.50e-01 ph/cm2/s
Fluence Cutoff-PL 6.39e-07 1.20e-06 1.69e-06 5.07e-06 4.83e-06 8.27e-06 erg/cm2
Error 3.05e-08 4.17e-08 6.56e-08 3.42e-07 1.59e-07 3.94e-07 erg/cm2
Peak flux Cutoff-PL 1.26e+00 1.61e+00 1.44e+00 1.87e+00 5.04e+00 6.18e+00 ph/cm2/s
Error 1.18e-01 1.00e-01 9.78e-02 5.16e-01 2.67e-01 4.81e-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 1.487 0.060 - - 4.82e-03 1.47e-04 52.670 57
CPL 1.482 0.061 9999.2 0.0 4.83e-03 2.78e-04 52.770 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.168 0.088 - - 4.33e-02 2.15e-03 47.250 57
CPL 1.029 0.272 359.3 -74.3 5.03e-02 1.54e-02 46.950 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: 60.672000 sec.
T50 in the 50-300 keV band: 31.616000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 105.572 -29.128 76.444
T90 63.676 -11.956 51.720
T50 33.268 5.428 38.696
Peak 1.000 37.352 38.352
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
212.9420 +16.7391 0.0065 26.7 -148.5 2.8311 29.7 TRIG_01329888
------------------------------------------
Foreground time interval of the image:
-29.128 12.733 (delta_t = 41.861 [sec])
Background time interval of the image:
-179.267 -29.128 (delta_t = 150.139 [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 -29.128 sec. to 76.444 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.48706 ( -0.0603559 0.0603157 )
Norm@50keV : 4.82423E-03 ( -0.000146557 0.00014654 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.67 using 59 PHA bins.
# Reduced chi-squared = 0.9241 for 57 degrees of freedom
# Null hypothesis probability = 6.380620e-01
Photon flux (15-150 keV) in 105.6 sec: 0.600181 ( -0.0201704 0.0203076 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.84319e-06 ( -1.56626e-07 1.57237e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -29.128 sec. to 76.444 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.48182 ( -0.0605888 0.0608439 )
Epeak [keV] : 9999.24 ( -9999.36 -9999.36 )
Norm@50keV : 4.83422E-03 ( -0.000146768 0.000410107 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.77 using 59 PHA bins.
# Reduced chi-squared = 0.9423 for 56 degrees of freedom
# Null hypothesis probability = 5.978761e-01
Photon flux (15-150 keV) in 105.6 sec: 0.600851 ( -0.02131 0.019385 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.83465e-06 ( -1.49857e-07 1.67883e-07 ) ergs/cm2
Band function
Time interval is from -29.128 sec. to 76.444 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.20690 ( 1.2069 1.2069 )
beta : -1.48705 ( -0.0603274 0.0603551 )
Epeak [keV] : 30.0207 ( -30.0197 -30.0197 )
Norm@50keV : 9.85752E-03 ( -0.00372122 10.9448 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.67 using 59 PHA bins.
# Reduced chi-squared = 0.9577 for 55 degrees of freedom
# Null hypothesis probability = 5.641170e-01
Photon flux (15-150 keV) in 105.6 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] : 16.6957 ( )
R^2/D10^2 : 4.43527E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 364.48 using 59 PHA bins.
# Reduced chi-squared = 6.3945 for 57 degrees of freedom
# Null hypothesis probability = 2.152968e-46
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.672e-07 1.721e-08
25- 50 1.165e-06 5.386e-08
50-150 2.305e-06 1.183e-07
15-150 3.737e-06 1.331e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-9.55522 -200)
Norm : 2.45846 (-0.0748999 0.0748999)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.466e-07 2.402e-08
25- 50 1.244e-06 4.382e-08
50-150 2.728e-06 9.662e-08
15-150 4.619e-06 1.573e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.82004 (-0.727734 0.769246)
R1^2/D10^2 : 0.457963 (-0.125731 0.188667)
kT2 [keV] : 35.8265 (-4.63716 6.66172)
R2^2/D10^2 : 2.81296E-03 (-0.00112123 0.00156722)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.787e-07 4.873e-08
25- 50 1.234e-06 7.392e-08
50-150 3.116e-06 3.311e-07
15-150 4.928e-06 3.955e-07
Peak spectrum fit
Power-law model
Time interval is from 37.352 sec. to 38.352 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.16825 ( -0.0885574 0.0882774 )
Norm@50keV : 4.33479E-02 ( -0.00215462 0.00215461 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.25 using 59 PHA bins.
# Reduced chi-squared = 0.8290 for 57 degrees of freedom
# Null hypothesis probability = 8.179473e-01
Photon flux (15-150 keV) in 1 sec: 5.06658 ( -0.257743 0.257961 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.43824e-07 ( -2.48916e-08 2.49907e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 37.352 sec. to 38.352 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.02911 ( -0.364842 0.17857 )
Epeak [keV] : 359.318 ( -247.417 -395.976 )
Norm@50keV : 5.03046E-02 ( -0.00845889 0.0223943 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.95 using 59 PHA bins.
# Reduced chi-squared = 0.8383 for 56 degrees of freedom
# Null hypothesis probability = 8.002342e-01
Photon flux (15-150 keV) in 1 sec: 5.03756 ( -0.26712 0.26689 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.4066e-07 ( -2.654e-08 2.5416e-08 ) ergs/cm2
Band function
Time interval is from 37.352 sec. to 38.352 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.762052 ( 0.77081 0.77081 )
beta : -1.24461 ( 1.24415 0.148411 )
Epeak [keV] : 127.271 ( -130.332 748.573 )
Norm@50keV : 7.27737E-02 ( -0.0320543 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.36 using 59 PHA bins.
# Reduced chi-squared = 0.8428 for 55 degrees of freedom
# Null hypothesis probability = 7.902474e-01
Photon flux (15-150 keV) in 1 sec: ( ) 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] : 19.1959 ( )
R^2/D10^2 : 0.268101 ( )
(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 1.935e-08 2.075e-09
25- 50 9.372e-08 6.445e-09
50-150 2.543e-07 2.280e-08
15-150 3.674e-07 2.185e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-7.94816 -200)
Norm : 20.7565 (-1.05668 1.05668)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.167e-08 2.830e-09
25- 50 9.940e-08 5.590e-09
50-150 2.180e-07 1.380e-08
15-150 3.691e-07 2.585e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.77917 (-1.71074 1.89197)
R1^2/D10^2 : 2.06310 (-0.868819 1.9119)
kT2 [keV] : 36.0901 (-7.2149 14.8517)
R2^2/D10^2 : 2.89211E-02 (-0.0182944 0.0311745)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.577e-08 7.000e-09
25- 50 9.694e-08 1.494e-08
50-150 3.107e-07 8.850e-08
15-150 4.435e-07 1.033e-07
Plot creation:
Fri Jul 4 01:38:23 EDT 2025