batgrbproduct analysis for trigger=1263718
batgrbproduct Analysis for Trigger=1263718
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): Thu Oct 31 07:53:15 EDT 2024
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1263718/GCN5_download_cron
======================================================================
Trigger: 01263718 Segment: 000
BAT Trigger Time: 751960117.568 [s; MET]
Trigger Stop: 751960118.08 [s; MET]
UTC: 2024-10-30T05:48:03.124380 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 343.032953716989 Dec: 80.4389595800238 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.9
Image Trigger?: NO
Rate S/N Ratio: 15.1327459504216 [ if not an image trigger ]
Image S/N Ratio: 8.9
Flight Position: [ source = BAT ]
RA: 343.032953716989 Dec: 80.4389595800238 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 343.216213246049 Dec: 80.4383838473643 [deg; J2000]
{ 22h 52m 51.9s , +80d 26' 18.2" }
+/- 1.12042515791975 [arcmin] (estimated 90% radius based on SNR)
+/- 0.417869281420229 [arcmin] (formal 1-sigma fit error)
SNR: 25.8566018916246
Angular difference between Flight and Ground position is 1.826726 arcmin
Partial Coding Fraction: 0.8046875 [ including projection effects ]
Duration
T90: 173.307999968529 +/- 4.99987201062231
Measured from: 18.3800001144409
to: 191.68800008297 [s; relative to TRIGTIME]
T50: 45.9119999408722 +/- 1.00024000888708
Measured from: 115.996000170708
to: 161.90800011158 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 147.452000021935
to: 148.452000021935 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.855999946594238
to: 276.484000086784 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 14.498723 17.337443 12.031329 2.662128
0.108326 0.114285 0.098873 0.078650 [error]
Peak 0.325363 0.527660 0.502058 0.155838
0.010324 0.012589 0.012704 0.008773 [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 4.27e-06 7.21e-06 9.26e-06 2.39e-05 2.73e-05 4.46e-05 erg/cm2
Error 1.38e-07 1.34e-07 1.39e-07 8.69e-07 3.73e-07 8.87e-07 erg/cm2
Peak flux Power-law 3.00e+00 3.70e+00 3.32e+00 5.16e+00 1.18e+01 1.52e+01 ph/cm2/s
Error 1.76e-01 1.28e-01 1.06e-01 3.65e-01 3.44e-01 4.50e-01 ph/cm2/s
Fluence Cutoff-PL 4.15e-06 7.21e-06 9.34e-06 2.18e-05 2.72e-05 4.25e-05 erg/cm2
Error 1.50e-07 1.35e-07 1.64e-07 2.46e-06 4.07e-07 1.90e-06 erg/cm2
Peak flux Cutoff-PL 2.89e+00 3.73e+00 3.37e+00 4.51e+00 1.17e+01 1.45e+01 ph/cm2/s
Error 2.31e-01 1.33e-01 9.70e-02 7.52e-01 3.65e-01 9.51e-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 1.639 0.027 - - 1.06e-02 1.49e-04 35.520 57
CPL 1.554 0.096 321.3 0.0 1.15e-02 0.00e+00 33.800 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.157 0.052 - - 1.01e-01 2.83e-03 37.060 57
CPL 1.024 0.179 424.8 0.0 1.16e-01 1.83e-02 35.720 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: 173.376000 sec.
T50 in the 50-300 keV band: 39.168000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 277.340 -0.856 276.484
T90 173.308 18.380 191.688
T50 45.912 115.996 161.908
Peak 1.000 147.452 148.452
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
343.2162 +80.4384 0.0074 17.5 -66.3 1.2326 25.9 TRIG_01263718
------------------------------------------
Foreground time interval of the image:
-0.856 10.333 (delta_t = 11.189 [sec])
Background time interval of the image:
-239.568 -0.856 (delta_t = 238.712 [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 -0.856 sec. to 276.484 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.63916 ( -0.0273614 0.0273146 )
Norm@50keV : 1.05833E-02 ( -0.000149258 0.000149042 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 35.52 using 59 PHA bins.
# Reduced chi-squared = 0.6232 for 57 degrees of freedom
# Null hypothesis probability = 9.885643e-01
Photon flux (15-150 keV) in 277.3 sec: 1.37702 ( -0.0254048 0.0255488 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.73246e-05 ( -3.72505e-07 3.72525e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.856 sec. to 276.484 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.55414 ( -0.112325 0.0794656 )
Epeak [keV] : 321.257 ( )
Norm@50keV : 1.14574E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 33.80 using 59 PHA bins.
# Reduced chi-squared = 0.6036 for 56 degrees of freedom
# Null hypothesis probability = 9.917819e-01
Photon flux (15-150 keV) in 277.3 sec: 1.36284 ( -0.03061 0.02907 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.71955e-05 ( -4.13399e-07 4.01419e-07 ) ergs/cm2
Band function
Time interval is from -0.856 sec. to 276.484 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.55422 ( 1.26183 5.931 )
beta : -9.99999 ( 9.99999 20 )
Epeak [keV] : 321.455 ( -101.763 -321.455 )
Norm@50keV : 1.14544E-02 ( -0.000834681 0.00097471 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 33.80 using 59 PHA bins.
# Reduced chi-squared = 0.6145 for 55 degrees of freedom
# Null hypothesis probability = 9.891570e-01
Photon flux (15-150 keV) in 277.3 sec: 1.36071 ( ) 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] : 18.4303 ( )
R^2/D10^2 : 6.71596E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 1165.29 using 59 PHA bins.
# Reduced chi-squared = 20.4436 for 57 degrees of freedom
# Null hypothesis probability = 1.872544e-206
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.257e-06 4.118e-08
25- 50 5.915e-06 1.317e-07
50-150 1.467e-05 2.828e-07
15-150 2.184e-05 3.161e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-12.5361 -200)
Norm : 5.40585 (-0.0736206 0.0736206)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.735e-06 6.655e-08
25- 50 7.184e-06 1.331e-07
50-150 1.575e-05 2.565e-07
15-150 2.667e-05 4.548e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.51031 (-0.397753 0.414533)
R1^2/D10^2 : 1.13892 (-0.207618 0.265284)
kT2 [keV] : 28.4173 (-1.23282 1.40382)
R2^2/D10^2 : 1.17177E-02 (-0.0019246 0.00213134)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.485e-06 1.983e-07
25- 50 7.343e-06 1.927e-07
50-150 1.588e-05 3.785e-07
15-150 2.671e-05 5.144e-07
Peak spectrum fit
Power-law model
Time interval is from 147.452 sec. to 148.452 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.15695 ( -0.0518231 0.0517586 )
Norm@50keV : 0.101193 ( -0.00282591 0.002825 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.06 using 59 PHA bins.
# Reduced chi-squared = 0.6502 for 57 degrees of freedom
# Null hypothesis probability = 9.812321e-01
Photon flux (15-150 keV) in 1 sec: 11.8111 ( -0.343681 0.344097 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.03956e-06 ( -3.19785e-08 3.20378e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 147.452 sec. to 148.452 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.02408 ( -0.203409 0.153793 )
Epeak [keV] : 424.751 ( -424.751 -424.751 )
Norm@50keV : 0.115784 ( -0.0109048 0.02568 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 35.72 using 59 PHA bins.
# Reduced chi-squared = 0.6378 for 56 degrees of freedom
# Null hypothesis probability = 9.841649e-01
Photon flux (15-150 keV) in 1 sec: 11.7224 ( -0.3652 0.3658 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.03306e-06 ( -3.3867e-08 3.373e-08 ) ergs/cm2
Band function
Time interval is from 147.452 sec. to 148.452 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.646661 ( 0.638644 0.638644 )
beta : -1.19633 ( 1.19625 0.0749664 )
Epeak [keV] : 96.9318 ( -93.7605 -93.7605 )
Norm@50keV : 0.203050 ( -0.111937 3347.36 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 35.45 using 59 PHA bins.
# Reduced chi-squared = 0.6446 for 55 degrees of freedom
# Null hypothesis probability = 9.812500e-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] : 20.3702 ( )
R^2/D10^2 : 0.512109 ( )
(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 4.066e-08 2.340e-09
25- 50 2.050e-07 8.100e-09
50-150 6.321e-07 2.895e-08
15-150 8.777e-07 3.285e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 49.1754 ( )
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.224e-07 3.800e-09
25- 50 2.355e-07 6.850e-09
50-150 5.166e-07 1.515e-08
15-150 8.746e-07 2.600e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.37188 (-0.969997 1.06245)
R1^2/D10^2 : 5.29387 (-1.6039 2.56479)
kT2 [keV] : 34.5479 (-3.61238 5.03622)
R2^2/D10^2 : 7.98238E-02 (-0.0278602 0.0349088)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.286e-08 8.380e-09
25- 50 2.195e-07 1.720e-08
50-150 7.372e-07 5.605e-08
15-150 1.040e-06 6.235e-08
Plot creation:
Thu Oct 31 07:56:53 EDT 2024