batgrbproduct analysis for trigger=1343270
batgrbproduct Analysis for Trigger=1343270
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): Tue Aug 19 04:51:52 EDT 2025
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1343270/GCN5_download_cron
======================================================================
Trigger: 01343270 Segment: 000
BAT Trigger Time: 777173518.912 [s; MET]
Trigger Stop: 777173519.936 [s; MET]
UTC: 2025-08-18T01:31:22.746580 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 213.833461809625 Dec: -58.0074587914962 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.69
Image Trigger?: NO
Rate S/N Ratio: 15.6843871413581 [ if not an image trigger ]
Image S/N Ratio: 8.69
Flight Position: [ source = BAT ]
RA: 213.833461809625 Dec: -58.0074587914962 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 213.814584044627 Dec: -58.0121357581664 [deg; J2000]
{ 14h 15m 15.5s , -58d 00' 43.7" }
+/- 1.11780337203391 [arcmin] (estimated 90% radius based on SNR)
+/- 0.378373371630273 [arcmin] (formal 1-sigma fit error)
SNR: 25.9432827772616
Angular difference between Flight and Ground position is 0.662431 arcmin
Partial Coding Fraction: 0.4453125 [ including projection effects ]
Duration
T90: 226.387999892235 +/- 76.5497337769367
Measured from: -0.619999766349792
to: 225.768000125885 [s; relative to TRIGTIME]
T50: 36.4520000219345 +/- 1.41993235661752
Measured from: 49.4880001544952
to: 85.9400001764297 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 77.6320000886917
to: 78.6320000886917 [s; relative to TRIGTIME]
Total Fluence
Measured from: -16.5
to: 551.344000101089 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 7.725613 8.317816 4.784687 1.108801
0.166695 0.171879 0.143280 0.128069 [error]
Peak 0.186426 0.253654 0.172450 0.041518
0.009574 0.010239 0.008849 0.005860 [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 2.45e-06 3.54e-06 3.79e-06 7.54e-06 1.21e-05 1.73e-05 erg/cm2
Error 1.33e-07 1.07e-07 1.53e-07 6.83e-07 3.55e-07 7.77e-07 erg/cm2
Peak flux Power-law 2.00e+00 1.83e+00 1.16e+00 1.13e+00 5.47e+00 6.13e+00 ph/cm2/s
Error 1.67e-01 9.36e-02 7.29e-02 1.45e-01 2.73e-01 2.92e-01 ph/cm2/s
Fluence Cutoff-PL 2.46e-06 3.54e-06 3.79e-06 7.48e-06 1.21e-05 1.73e-05 erg/cm2
Error 1.33e-07 1.05e-07 1.16e-07 1.34e-06 3.62e-07 1.40e-06 erg/cm2
Peak flux Cutoff-PL 1.91e+00 1.87e+00 1.19e+00 8.58e-01 5.40e+00 5.83e+00 ph/cm2/s
Error 2.05e-01 1.09e-01 8.11e-02 2.27e-01 2.88e-01 4.53e-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 1.901 0.058 - - 2.50e-03 7.37e-05 49.650 57
CPL 1.883 0.239 333.4 0.0 2.56e-03 0.00e+00 49.700 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.657 0.086 - - 4.18e-02 2.06e-03 41.320 57
CPL 1.412 0.323 121.2 -38.1 5.54e-02 2.16e-02 39.820 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: 98.112000 sec.
T50 in the 50-300 keV band: 33.472000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 567.844 -16.500 551.344
T90 226.388 -0.620 225.768
T50 36.452 49.488 85.940
Peak 1.000 77.632 78.632
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
213.8146 -58.0121 0.0074 27.6 86.2 3.9515 25.9 TRIG_01343270
------------------------------------------
Foreground time interval of the image:
-16.500 19.389 (delta_t = 35.889 [sec])
Background time interval of the image:
-239.912 -50.552 (delta_t = 189.360 [sec])
-47.912 -47.332 (delta_t = 0.580 [sec])
-45.912 -41.472 (delta_t = 4.440 [sec])
-34.912 -16.500 (delta_t = 18.412 [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
-16.500000 88.348000
89.088000 473.658000
475.088000 482.131600
520.088000 536.698000
538.088000 551.344000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.90075 ( -0.0578815 0.0582807 )
Norm@50keV : 2.50456E-03 ( -7.38343e-05 7.35332e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.65 using 59 PHA bins.
# Reduced chi-squared = 0.8711 for 57 degrees of freedom
# Null hypothesis probability = 7.443523e-01
Photon flux (15-150 keV) in 526.3 sec: 0.359544 ( -0.0115808 0.0116425 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.21187e-05 ( -3.54139e-07 3.55018e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-16.500000 88.348000
89.088000 473.658000
475.088000 482.131600
520.088000 536.698000
538.088000 551.344000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.88313 ( -0.199192 0.279529 )
Epeak [keV] : 333.389 ( )
Norm@50keV : 2.55518E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.70 using 59 PHA bins.
# Reduced chi-squared = 0.8874 for 56 degrees of freedom
# Null hypothesis probability = 7.108707e-01
Photon flux (15-150 keV) in 526.3 sec: 0.359539 ( -0.013119 0.011428 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.21166e-05 ( -3.71884e-07 3.52516e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-16.500000 88.348000
89.088000 473.658000
475.088000 482.131600
520.088000 536.698000
538.088000 551.344000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.78504 ( 1.50747 1.50747 )
beta : -1.92308 ( 1.91115 0.0680615 )
Epeak [keV] : 76.3058 ( -36.3981 -36.3981 )
Norm@50keV : 2.90228E-03 ( -0.000525005 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.48 using 59 PHA bins.
# Reduced chi-squared = 0.8996 for 55 degrees of freedom
# Null hypothesis probability = 6.847092e-01
Photon flux (15-150 keV) in 526.3 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] : 12.7265 ( )
R^2/D10^2 : 6.25901E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 360.29 using 59 PHA bins.
# Reduced chi-squared = 6.3209 for 57 degrees of freedom
# Null hypothesis probability = 1.278407e-45
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.132e-06 6.342e-08
25- 50 3.808e-06 1.382e-07
50-150 3.850e-06 2.489e-07
15-150 8.790e-06 2.763e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 96.4653 (-10.1709 12.2398)
Norm : 1.53787 (-0.0739479 0.0792846)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.115e-06 1.413e-07
25- 50 3.630e-06 1.424e-07
50-150 5.762e-06 1.355e-06
15-150 1.151e-05 1.410e-06
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.90909 (-0.649318 0.662698)
R1^2/D10^2 : 0.468521 (-0.13213 0.210144)
kT2 [keV] : 25.8823 (-2.98119 3.95999)
R2^2/D10^2 : 3.32699E-03 (-0.00134122 0.00197452)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.065e-06 1.916e-07
25- 50 3.644e-06 1.895e-07
50-150 6.095e-06 6.476e-07
15-150 1.180e-05 7.973e-07
Peak spectrum fit
Power-law model
Time interval is from 77.632 sec. to 78.632 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.65656 ( -0.0851579 0.0860189 )
Norm@50keV : 4.17961E-02 ( -0.00206783 0.00206091 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.32 using 59 PHA bins.
# Reduced chi-squared = 0.7250 for 57 degrees of freedom
# Null hypothesis probability = 9.412785e-01
Photon flux (15-150 keV) in 1 sec: 5.46938 ( -0.272466 0.272942 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.88468e-07 ( -2.02648e-08 2.03356e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 77.632 sec. to 78.632 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.41239 ( -0.363039 0.283612 )
Epeak [keV] : 121.226 ( -45.0186 -121.227 )
Norm@50keV : 5.54429E-02 ( -0.0149488 0.0282183 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.82 using 59 PHA bins.
# Reduced chi-squared = 0.7110 for 56 degrees of freedom
# Null hypothesis probability = 9.498293e-01
Photon flux (15-150 keV) in 1 sec: 5.40060 ( -0.28748 0.28784 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.82166e-07 ( -2.2361e-08 2.2222e-08 ) ergs/cm2
Band function
Time interval is from 77.632 sec. to 78.632 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.21729 ( 1.15919 4.101 )
beta : -1.84945 ( 1.8432 0.223185 )
Epeak [keV] : 80.8122 ( -81.7081 126.738 )
Norm@50keV : 7.15364E-02 ( -0.0297286 5752.51 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.83 using 59 PHA bins.
# Reduced chi-squared = 0.7061 for 55 degrees of freedom
# Null hypothesis probability = 9.515106e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.80612e-07 ( -3.80605e-07 -2.1955e-08 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.9383 ( )
R^2/D10^2 : 0.770496 ( )
(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 3.163e-08 2.975e-09
25- 50 1.171e-07 6.750e-09
50-150 1.495e-07 1.555e-08
15-150 2.983e-07 1.805e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 160.046 (-35.6835 -159.403)
Norm : 22.3019 (-1.20336 1.4717)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.694e-08 4.110e-09
25- 50 1.065e-07 9.955e-09
50-150 2.158e-07 6.525e-08
15-150 3.793e-07 7.405e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.27919 (-1.41925 1.62358)
R1^2/D10^2 : 5.28000 (-2.41713 5.66792)
kT2 [keV] : 25.9768 (-4.98305 10.3865)
R2^2/D10^2 : 6.07863E-02 (-0.0418264 0.0781184)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.370e-08 1.001e-08
25- 50 1.093e-07 1.414e-08
50-150 2.138e-07 5.445e-08
15-150 3.768e-07 6.810e-08
Plot creation:
Tue Aug 19 04:56:43 EDT 2025