batgrbproduct analysis for trigger=1340514
batgrbproduct Analysis for Trigger=1340514
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 Aug 8 09:43:54 EDT 2025
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1340514/GCN5_download_cron
======================================================================
Trigger: 01340514 Segment: 000
BAT Trigger Time: 776256404.544 [s; MET]
Trigger Stop: 776256405.568 [s; MET]
UTC: 2025-08-07T10:46:08.440980 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 51.4200250231075 Dec: -47.8774784688358 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 19.67
Image Trigger?: NO
Rate S/N Ratio: 139.046754726603 [ if not an image trigger ]
Image S/N Ratio: 19.67
Flight Position: [ source = BAT ]
RA: 51.4200250231075 Dec: -47.8774784688358 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 51.434772770305 Dec: -47.8812123134081 [deg; J2000]
{ 03h 25m 44.3s , -47d 52' 52.4" }
+/- 0.563417428815792 [arcmin] (estimated 90% radius based on SNR)
+/- 0.171123353178469 [arcmin] (formal 1-sigma fit error)
SNR: 69.0359215570572
Angular difference between Flight and Ground position is 0.634351 arcmin
Partial Coding Fraction: 0.7265625 [ including projection effects ]
Duration
T90: 75.4439998865128 +/- 2.3070326746217
Measured from: -0.571999907493591
to: 74.8719999790192 [s; relative to TRIGTIME]
T50: 32.4800000190735 +/- 0.339246267715653
Measured from: 6.05200004577637
to: 38.5320000648499 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 33.8159999847412
to: 34.8159999847412 [s; relative to TRIGTIME]
Total Fluence
Measured from: -19.4960000514984
to: 130.455999970436 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 8.561709 12.923814 11.786541 3.936027
0.091813 0.101591 0.093595 0.072729 [error]
Peak 0.372346 0.677270 0.774057 0.307937
0.013147 0.016824 0.018120 0.014635 [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 2.76e-06 5.66e-06 9.07e-06 3.25e-05 2.51e-05 5.00e-05 erg/cm2
Error 9.03e-08 1.09e-07 1.25e-07 1.08e-06 3.32e-07 1.08e-06 erg/cm2
Peak flux Power-law 3.63e+00 4.99e+00 5.07e+00 9.35e+00 1.67e+01 2.30e+01 ph/cm2/s
Error 2.24e-01 1.82e-01 1.48e-01 6.22e-01 4.76e-01 6.95e-01 ph/cm2/s
Fluence Cutoff-PL 2.75e-06 5.66e-06 9.08e-06 3.22e-05 2.52e-05 4.97e-05 erg/cm2
Error 9.13e-08 1.10e-07 1.24e-07 1.44e-06 3.32e-07 1.25e-06 erg/cm2
Peak flux Cutoff-PL 3.62e+00 4.99e+00 5.07e+00 9.30e+00 1.67e+01 2.30e+01 ph/cm2/s
Error 2.22e-01 1.80e-01 1.48e-01 3.99e-01 4.73e-01 7.93e-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 1.319 0.026 - - 1.77e-02 2.57e-04 34.450 57
CPL 1.315 0.039 9997.6 0.0 1.78e-02 6.11e-04 34.580 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.979 0.051 - - 1.45e-01 4.05e-03 48.400 57
CPL 0.975 0.052 9999.4 0.0 1.46e-01 4.64e-03 48.570 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: 56.128000 sec.
T50 in the 50-300 keV band: 32.576000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 149.952 -19.496 130.456
T90 75.444 -0.572 74.872
T50 32.480 6.052 38.532
Peak 1.000 33.816 34.816
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
51.4348 -47.8812 0.0028 34.7 -174.9 11.8674 69.0 TRIG_01340514
------------------------------------------
Foreground time interval of the image:
-19.496 10.357 (delta_t = 29.853 [sec])
Background time interval of the image:
-239.544 -100.474 (delta_t = 139.070 [sec])
-99.544 -99.404 (delta_t = 0.140 [sec])
-98.544 -55.304 (delta_t = 43.240 [sec])
-54.544 -19.496 (delta_t = 35.048 [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
Multiple GTIs in the spectrum
tstart tstop
-19.496000 122.577000
128.456000 130.456000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.31898 ( -0.0258844 0.0257895 )
Norm@50keV : 1.77415E-02 ( -0.000256927 0.000256093 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 34.45 using 59 PHA bins.
# Reduced chi-squared = 0.6045 for 57 degrees of freedom
# Null hypothesis probability = 9.921287e-01
Photon flux (15-150 keV) in 144.1 sec: 2.12419 ( -0.0362192 0.036361 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.51485e-05 ( -3.32002e-07 3.31993e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-19.496000 122.577000
128.456000 130.456000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.31466 ( -0.0516332 0.0258489 )
Epeak [keV] : 9997.64 ( -9998.06 -9998.06 )
Norm@50keV : 1.78136E-02 ( -0.000240275 0.00098261 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 34.58 using 59 PHA bins.
# Reduced chi-squared = 0.6175 for 56 degrees of freedom
# Null hypothesis probability = 9.891582e-01
Photon flux (15-150 keV) in 144.1 sec: 2.12269 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.51557e-05 ( -3.3215e-07 3.32006e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-19.496000 122.577000
128.456000 130.456000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.555095 ( 0.883884 4.339 )
beta : -1.32217 ( -0.0283372 0.0270693 )
Epeak [keV] : 48.0259 ( -47.9911 216.33 )
Norm@50keV : 6.41391E-02 ( -0.0644677 1.28706e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 33.95 using 59 PHA bins.
# Reduced chi-squared = 0.6173 for 55 degrees of freedom
# Null hypothesis probability = 9.885604e-01
Photon flux (15-150 keV) in 144.1 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] : 22.4025 ( )
R^2/D10^2 : 6.20740E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 1214.28 using 59 PHA bins.
# Reduced chi-squared = 21.3032 for 57 degrees of freedom
# Null hypothesis probability = 1.331664e-216
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.238e-07 2.522e-08
25- 50 4.403e-06 9.655e-08
50-150 1.651e-05 2.882e-07
15-150 2.174e-05 3.242e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 9.39718 ( )
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.372e-06 5.548e-08
25- 50 6.486e-06 9.799e-08
50-150 1.423e-05 2.205e-07
15-150 2.408e-05 3.963e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.63794 (-0.464593 0.486071)
R1^2/D10^2 : 0.977656 (-0.166533 0.208967)
kT2 [keV] : 35.9410 (-1.79031 2.09145)
R2^2/D10^2 : 1.09721E-02 (-0.00186409 0.00205331)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.285e-06 1.174e-07
25- 50 5.857e-06 1.398e-07
50-150 1.692e-05 3.602e-07
15-150 2.507e-05 4.683e-07
Peak spectrum fit
Power-law model
Time interval is from 33.816 sec. to 34.816 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.978548 ( -0.0514452 0.0511774 )
Norm@50keV : 0.145089 ( -0.00405288 0.00404051 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.40 using 59 PHA bins.
# Reduced chi-squared = 0.8491 for 57 degrees of freedom
# Null hypothesis probability = 7.842314e-01
Photon flux (15-150 keV) in 1 sec: 16.6870 ( -0.475134 0.476075 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.58106e-06 ( -4.67734e-08 4.64558e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 33.816 sec. to 34.816 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.975114 ( -0.0545582 0.0491015 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 0.145891 ( -0.0041015 0.00517503 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.57 using 59 PHA bins.
# Reduced chi-squared = 0.8672 for 56 degrees of freedom
# Null hypothesis probability = 7.493712e-01
Photon flux (15-150 keV) in 1 sec: 16.6792 ( -0.4701 0.4768 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.57964e-06 ( 0 0 ) ergs/cm2
Band function
Time interval is from 33.816 sec. to 34.816 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.830021 ( 0.830021 0.830021 )
beta : -0.978563 ( -0.0511612 0.0514639 )
Epeak [keV] : 44.8229 ( -44.8229 -44.8229 )
Norm@50keV : 0.232456 ( -0.0791408 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.40 using 59 PHA bins.
# Reduced chi-squared = 0.8800 for 55 degrees of freedom
# Null hypothesis probability = 7.230813e-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] : 24.3627 ( )
R^2/D10^2 : 0.432502 ( )
(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 4.520e-08 2.520e-09
25- 50 2.530e-07 1.185e-08
50-150 1.117e-06 4.450e-08
15-150 1.416e-06 4.750e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 69.1124 ( )
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.721e-07 5.300e-09
25- 50 3.310e-07 1.070e-08
50-150 7.261e-07 2.345e-08
15-150 1.229e-06 3.500e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.03686 (-0.847726 0.944599)
R1^2/D10^2 : 8.03131 (-2.42558 3.70678)
kT2 [keV] : 39.5857 (-3.69069 4.93398)
R2^2/D10^2 : 8.93562E-02 (-0.0255027 0.0301132)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.123e-07 1.185e-08
25- 50 2.898e-07 1.965e-08
50-150 1.212e-06 7.400e-08
15-150 1.614e-06 8.850e-08
Plot creation:
Fri Aug 8 09:47:06 EDT 2025