batgrbproduct analysis for trigger=1293340
batgrbproduct Analysis for Trigger=1293340
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 Mar 7 10:49:30 EST 2025
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1293340/GCN5_download_cron
======================================================================
Trigger: 01293340 Segment: 000
BAT Trigger Time: 762971443.904 [s; MET]
Trigger Stop: 762971444.928 [s; MET]
UTC: 2025-03-06T16:30:08.708060 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 354.730006688864 Dec: -47.9933965939604 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 22.45
Image Trigger?: NO
Rate S/N Ratio: 169.911741795557 [ if not an image trigger ]
Image S/N Ratio: 22.45
Flight Position: [ source = BAT ]
RA: 354.730006688864 Dec: -47.9933965939604 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 354.723635868554 Dec: -47.9980107745144 [deg; J2000]
{ 23h 38m 53.7s , -47d 59' 52.8" }
+/- 1.05504817680704 [arcmin] (estimated 90% radius based on SNR)
+/- 0.400588778324707 [arcmin] (formal 1-sigma fit error)
SNR: 28.1755400788104
Angular difference between Flight and Ground position is 0.376932 arcmin
Partial Coding Fraction: 0.1308594 [ including projection effects ]
Duration
T90: 11.4400000572205 +/- 2.43956709924402
Measured from: -0.367999911308289
to: 11.0720001459122 [s; relative to TRIGTIME]
T50: 4.03200006484985 +/- 0.187275201260285
Measured from: 0.560000061988831
to: 4.59200012683868 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.179999947547913
to: 1.17999994754791 [s; relative to TRIGTIME]
Total Fluence
Measured from: -1.5200001001358
to: 19.039999961853 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 2.556844 4.143385 4.335429 1.227726
0.106603 0.124881 0.119867 0.087241 [error]
Peak 0.696815 1.330483 1.625658 0.528718
0.040840 0.055201 0.061623 0.041373 [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 1.04e-06 2.08e-06 3.23e-06 1.10e-05 9.01e-06 1.73e-05 erg/cm2
Error 6.60e-08 7.95e-08 1.17e-07 8.83e-07 2.98e-07 9.45e-07 erg/cm2
Peak flux Power-law 9.08e+00 1.12e+01 1.01e+01 1.58e+01 3.59e+01 4.62e+01 ph/cm2/s
Error 7.33e-01 5.72e-01 4.74e-01 1.50e+00 1.59e+00 2.06e+00 ph/cm2/s
Fluence Cutoff-PL 9.16e-07 2.14e-06 3.42e-06 6.38e-06 8.88e-06 1.29e-05 erg/cm2
Error 8.59e-08 8.72e-08 1.49e-07 1.57e-06 3.10e-07 1.56e-06 erg/cm2
Peak flux Cutoff-PL 7.38e+00 1.18e+01 1.13e+01 8.60e+00 3.52e+01 3.90e+01 ph/cm2/s
Error 9.26e-01 6.42e-01 6.56e-01 1.93e+00 1.61e+00 2.50e+00 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 7.52e+00 1.17e+01 1.12e+01 9.21e+00 3.53e+01 3.97e+01 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 1.367 0.055 - - 4.50e-02 1.45e-03 75.580 57
CPL 0.868 0.244 132.8 45.6 7.45e-02 1.81e-02 62.110 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.152 0.068 - - 3.08e-01 1.32e-02 67.740 57
CPL 0.365 0.319 122.4 30.4 6.84e-01 2.20e-01 47.070 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: 8.000000 sec.
T50 in the 50-300 keV band: 3.776000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 20.560 -1.520 19.040
T90 11.440 -0.368 11.072
T50 4.032 0.560 4.592
Peak 1.000 0.180 1.180
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
354.7236 -47.9980 0.0068 49.6 -37.2 13.0489 28.2 TRIG_01293340
------------------------------------------
Foreground time interval of the image:
-1.520 19.040 (delta_t = 20.560 [sec])
Background time interval of the image:
-239.904 -185.204 (delta_t = 54.700 [sec])
-183.904 -1.520 (delta_t = 182.384 [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 -1.520 sec. to 19.040 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.36720 ( -0.0550254 0.0549407 )
Norm@50keV : 4.50398E-02 ( -0.00144685 0.00144639 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.58 using 59 PHA bins.
# Reduced chi-squared = 1.326 for 57 degrees of freedom
# Null hypothesis probability = 5.033133e-02
Photon flux (15-150 keV) in 20.56 sec: 5.44558 ( -0.191869 0.192331 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.00993e-06 ( -2.98317e-07 2.98492e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -1.520 sec. to 19.040 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.868145 ( -0.250551 0.237678 )
Epeak [keV] : 132.758 ( -25.6847 65.4523 )
Norm@50keV : 7.44880E-02 ( -0.0155128 0.0206726 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.11 using 59 PHA bins.
# Reduced chi-squared = 1.109 for 56 degrees of freedom
# Null hypothesis probability = 2.674827e-01
Photon flux (15-150 keV) in 20.56 sec: 5.29963 ( -0.20164 0.20238 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.87731e-06 ( -3.10312e-07 3.08955e-07 ) ergs/cm2
Band function
Time interval is from -1.520 sec. to 19.040 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.823057 ( -0.274505 0.359881 )
beta : -1.81411 ( 1.81822 0.287941 )
Epeak [keV] : 123.462 ( -35.4773 68.9094 )
Norm@50keV : 7.86575E-02 ( -0.0194208 0.0407211 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.88 using 59 PHA bins.
# Reduced chi-squared = 1.125 for 55 degrees of freedom
# Null hypothesis probability = 2.440241e-01
Photon flux (15-150 keV) in 20.56 sec: 6.92284 ( 0.07716 -0.25151 ) 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] : 18.9707 ( )
R^2/D10^2 : 0.289730 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 210.29 using 59 PHA bins.
# Reduced chi-squared = 3.6893 for 57 degrees of freedom
# Null hypothesis probability = 2.026520e-19
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.216e-07 2.704e-08
25- 50 2.026e-06 8.954e-08
50-150 5.356e-06 2.734e-07
15-150 7.804e-06 2.765e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-5.06438 -200)
Norm : 23.1052 (-0.743201 0.743201)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.183e-06 4.297e-08
25- 50 2.276e-06 8.430e-08
50-150 4.992e-06 1.830e-07
15-150 8.452e-06 2.940e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.89809 (-1.21347 1.54786)
R1^2/D10^2 : 4.52269 (-2.19593 4.7218)
kT2 [keV] : 25.6725 (-2.19655 3.31786)
R2^2/D10^2 : 8.74366E-02 (-0.0330235 0.0359339)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.028e-07 1.372e-07
25- 50 2.098e-06 1.800e-07
50-150 5.824e-06 3.454e-07
15-150 8.825e-06 4.893e-07
Peak spectrum fit
Power-law model
Time interval is from 0.180 sec. to 1.180 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.15204 ( -0.0681971 0.0681026 )
Norm@50keV : 0.307687 ( -0.0131562 0.0131521 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.74 using 59 PHA bins.
# Reduced chi-squared = 1.188 for 57 degrees of freedom
# Null hypothesis probability = 1.560777e-01
Photon flux (15-150 keV) in 1 sec: 35.8913 ( -1.58647 1.58784 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.1655e-06 ( -1.44655e-07 1.44806e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.180 sec. to 1.180 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.365379 ( -0.330211 0.30873 )
Epeak [keV] : 122.410 ( -19.9006 40.8246 )
Norm@50keV : 0.683718 ( -0.179399 0.260042 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.07 using 59 PHA bins.
# Reduced chi-squared = 0.8406 for 56 degrees of freedom
# Null hypothesis probability = 7.964325e-01
Photon flux (15-150 keV) in 1 sec: 35.1690 ( -1.6043 1.6081 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.13163e-06 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.180 sec. to 1.180 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.365321 ( -0.296956 0.302032 )
beta : -10.0000 ( 10 1.77636e-15 )
Epeak [keV] : 122.390 ( -11.646 40.8315 )
Norm@50keV : 0.683763 ( -0.179566 0.260037 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.07 using 59 PHA bins.
# Reduced chi-squared = 0.8559 for 55 degrees of freedom
# Null hypothesis probability = 7.675850e-01
Photon flux (15-150 keV) in 1 sec: 35.3030 ( ) 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] : 20.6532 (-1.00302 1.063)
R^2/D10^2 : 1.60628 (-0.244845 0.284645)
(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 1.304e-07 1.040e-08
25- 50 6.631e-07 4.250e-08
50-150 2.105e-06 1.445e-07
15-150 2.898e-06 1.420e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 148.922 ( )
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.708e-07 1.735e-08
25- 50 7.133e-07 3.405e-08
50-150 1.565e-06 6.950e-08
15-150 2.649e-06 1.215e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.41758 (-1.82186 2.43803)
R1^2/D10^2 : 17.6153 (-9.79141 28.5004)
kT2 [keV] : 26.6809 (-2.67091 4.42464)
R2^2/D10^2 : 0.597673 (-0.267039 0.289451)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.360e-07 6.550e-08
25- 50 6.695e-07 9.215e-08
50-150 2.230e-06 2.520e-07
15-150 3.136e-06 3.110e-07
Plot creation:
Fri Mar 7 10:52:59 EST 2025