batgrbproduct analysis for trigger=1314210
batgrbproduct Analysis for Trigger=1314210
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): Sun May 18 20:49:40 EDT 2025
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1314210/batgroup_hand_proc
======================================================================
Trigger: 01314210 Segment: 000
BAT Trigger Time: 769098964.544 [s; MET]
Trigger Stop: 769098965.056 [s; MET]
UTC: 2025-05-16T14:35:28.929340 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 334.561458739418 Dec: -9.13022768057874 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.41
Image Trigger?: NO
Rate S/N Ratio: 14.3874945699382 [ if not an image trigger ]
Image S/N Ratio: 8.41
Flight Position: [ source = BAT ]
RA: 334.561458739418 Dec: -9.13022768057874 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 334.611559596065 Dec: -9.11996954812633 [deg; J2000]
{ 22h 18m 26.8s , -09d 07' 11.9" }
+/- 1.07394794527236 [arcmin] (estimated 90% radius based on SNR)
+/- 0.402084291614899 [arcmin] (formal 1-sigma fit error)
SNR: 27.4698710535286
Angular difference between Flight and Ground position is 3.031154 arcmin
Partial Coding Fraction: 0.6171875 [ including projection effects ]
Duration
T90: 30.0360000133514 +/- 6.009781712102
Measured from: -8.87600004673004
to: 21.1599999666214 [s; relative to TRIGTIME]
T50: 11.2279999256134 +/- 3.18612302278263
Measured from: 2.68400001525879
to: 13.9119999408722 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 19.3880000114441
to: 20.3880000114441 [s; relative to TRIGTIME]
Total Fluence
Measured from: -19.960000038147
to: 22.6959999799728 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.068443 1.448206 0.940731 0.288810
0.052782 0.055930 0.047726 0.038384 [error]
Peak 0.121305 0.161182 0.117846 0.035667
0.010070 0.011399 0.009887 0.007016 [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 3.84e-07 6.28e-07 7.78e-07 1.91e-06 2.33e-06 3.70e-06 erg/cm2
Error 3.13e-08 3.03e-08 4.84e-08 2.58e-07 1.15e-07 2.92e-07 erg/cm2
Peak flux Power-law 1.32e+00 1.26e+00 8.45e-01 8.79e-01 3.79e+00 4.31e+00 ph/cm2/s
Error 1.69e-01 1.01e-01 8.18e-02 1.73e-01 2.92e-01 3.23e-01 ph/cm2/s
Fluence Cutoff-PL 3.85e-07 6.31e-07 7.76e-07 1.76e-06 2.32e-06 3.55e-06 erg/cm2
Error 3.30e-08 3.27e-08 4.73e-08 4.24e-07 1.21e-07 4.19e-07 erg/cm2
Peak flux Cutoff-PL 1.32e+00 1.27e+00 8.43e-01 8.69e-01 3.79e+00 4.30e+00 ph/cm2/s
Error 1.72e-01 1.01e-01 8.21e-02 2.03e-01 2.91e-01 2.65e-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 1.691 0.085 - - 5.89e-03 2.77e-04 63.060 57
CPL 1.693 0.085 9999.4 -0.0 5.89e-03 1.22e-03 63.070 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.582 0.130 - - 2.96e-02 2.29e-03 40.170 57
CPL 1.587 0.131 9999.4 0.0 2.96e-02 2.23e-02 40.200 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: 19.392000 sec.
T50 in the 50-300 keV band: 7.872000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 42.656 -19.960 22.696
T90 30.036 -8.876 21.160
T50 11.228 2.684 13.912
Peak 1.000 19.388 20.388
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
334.6116 -9.1200 0.0070 38.1 -159.7 2.5247 27.5 TRIG_01314210
------------------------------------------
Foreground time interval of the image:
-19.960 9.957 (delta_t = 29.917 [sec])
Background time interval of the image:
-239.544 -19.960 (delta_t = 219.584 [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 -19.960 sec. to 22.696 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.69108 ( -0.0843711 0.084962 )
Norm@50keV : 5.89015E-03 ( -0.000277682 0.00027682 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.06 using 59 PHA bins.
# Reduced chi-squared = 1.106 for 57 degrees of freedom
# Null hypothesis probability = 2.708051e-01
Photon flux (15-150 keV) in 42.66 sec: 0.779855 ( -0.037898 0.0380318 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.32817e-06 ( -1.14631e-07 1.15149e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -19.960 sec. to 22.696 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.69330 ( -0.0872127 0.0832579 )
Epeak [keV] : 9999.36 ( -9999.35 -9999.36 )
Norm@50keV : 5.89360E-03 ( -0.000271097 0.00217343 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.07 using 59 PHA bins.
# Reduced chi-squared = 1.126 for 56 degrees of freedom
# Null hypothesis probability = 2.406965e-01
Photon flux (15-150 keV) in 42.66 sec: 0.779915 ( -0.041058 0.037219 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.32031e-06 ( -1.15899e-07 1.25651e-07 ) ergs/cm2
Band function
Time interval is from -19.960 sec. to 22.696 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.404585 ( 0.993638 0.993638 )
beta : -1.74829 ( -0.15243 0.110117 )
Epeak [keV] : 36.0393 ( -35.8384 230.976 )
Norm@50keV : 4.47192E-02 ( -0.046253 516.266 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.36 using 59 PHA bins.
# Reduced chi-squared = 1.116 for 55 degrees of freedom
# Null hypothesis probability = 2.587868e-01
Photon flux (15-150 keV) in 42.66 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] : 13.4363 ( )
R^2/D10^2 : 0.121212 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 204.89 using 59 PHA bins.
# Reduced chi-squared = 3.5945 for 57 degrees of freedom
# Null hypothesis probability = 1.488500e-18
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.978e-07 1.886e-08
25- 50 7.055e-07 3.647e-08
50-150 8.205e-07 7.999e-08
15-150 1.724e-06 8.959e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 144.425 (-26.4381 46.781)
Norm : 3.20971 (-0.195484 0.193562)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.436e-07 2.700e-08
25- 50 6.397e-07 5.375e-08
50-150 1.279e-06 3.780e-07
15-150 2.262e-06 4.343e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.62370 (-0.874707 0.916345)
R1^2/D10^2 : 0.728951 (-0.235353 0.388064)
kT2 [keV] : 33.0572 (-6.03403 10.0269)
R2^2/D10^2 : 3.75739E-03 (-0.00209359 0.00373274)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.404e-07 4.609e-08
25- 50 6.706e-07 7.295e-08
50-150 1.332e-06 3.428e-07
15-150 2.343e-06 3.865e-07
Peak spectrum fit
Power-law model
Time interval is from 19.388 sec. to 20.388 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.58243 ( -0.129451 0.130848 )
Norm@50keV : 2.96177E-02 ( -0.00229276 0.00228056 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.17 using 59 PHA bins.
# Reduced chi-squared = 0.7048 for 57 degrees of freedom
# Null hypothesis probability = 9.554867e-01
Photon flux (15-150 keV) in 1 sec: 3.78558 ( -0.291348 0.291749 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.77598e-07 ( -2.30151e-08 2.31559e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 19.388 sec. to 20.388 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.58667 ( -0.134749 0.127733 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 2.95508E-02 ( -0.0296502 0.0149728 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.20 using 59 PHA bins.
# Reduced chi-squared = 0.7178 for 56 degrees of freedom
# Null hypothesis probability = 9.449977e-01
Photon flux (15-150 keV) in 1 sec: 3.78624 ( -0.29313 0.28985 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.77379e-07 ( -2.2734e-08 2.3134e-08 ) ergs/cm2
Band function
Time interval is from 19.388 sec. to 20.388 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.39863 ( -4.39863 -4.39863 )
beta : -1.65965 ( -0.154807 0.147717 )
Epeak [keV] : 24.5326 ( -24.5326 4.20946 )
Norm@50keV : 1339.74 ( -99.7178 1.91318e+07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.64 using 59 PHA bins.
# Reduced chi-squared = 0.7026 for 55 degrees of freedom
# Null hypothesis probability = 9.538252e-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] : 13.5804 (-1.41052 1.6287)
R^2/D10^2 : 0.591788 (-0.197755 0.287012)
(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 2.311e-08 3.320e-09
25- 50 8.334e-08 7.795e-09
50-150 9.960e-08 1.575e-08
15-150 2.060e-07 1.980e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 198.306 (-62.8761 -198.402)
Norm : 15.3605 (-1.14764 1.28464)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.828e-08 3.645e-09
25- 50 7.358e-08 1.182e-08
50-150 1.611e-07 5.238e-08
15-150 2.730e-07 7.970e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.61079 (-1.22652 1.36933)
R1^2/D10^2 : 3.61659 (-1.56441 3.09898)
kT2 [keV] : 37.5244 (-9.65134 21.8092)
R2^2/D10^2 : 1.39259E-02 (-0.00993724 0.0225564)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.906e-08 8.550e-09
25- 50 7.604e-08 1.587e-08
50-150 1.690e-07 8.040e-08
15-150 2.841e-07 8.235e-08
Plot creation:
Sun May 18 20:56:27 EDT 2025