batgrbproduct analysis for trigger=1205401
batgrbproduct Analysis for Trigger=1205401
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 Dec 31 17:26:25 EST 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1205401/GCN5_download_cron
======================================================================
Trigger: 01205401 Segment: 000
BAT Trigger Time: 725653552 [s; MET]
Trigger Stop: 725653616 [s; MET]
UTC: 2023-12-30T18:25:19.358020 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 83.5953571114216 Dec: 21.7519343894387 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 16.4
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 16.4
Flight Position: [ source = BAT ]
RA: 83.5953571114216 Dec: 21.7519343894387 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 83.595305489484 Dec: 21.7636049654907 [deg; J2000]
{ 05h 34m 22.9s , +21d 45' 49.0" }
+/- 1.10165953163507 [arcmin] (estimated 90% radius based on SNR)
+/- 0.396438319394921 [arcmin] (formal 1-sigma fit error)
SNR: 26.4880916798667
Angular difference between Flight and Ground position is 0.700240 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 893.095999956131 +/- 46.2300715918298
Measured from: -121.307999849319
to: 771.788000106812 [s; relative to TRIGTIME]
T50: 443.555999994278 +/- 27.9361008537286
Measured from: 172.152000069618
to: 615.708000063896 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 801.340000033379
to: 802.340000033379 [s; relative to TRIGTIME]
Total Fluence
Measured from: -209.592000007629
to: 803.728000044823 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 15.301738 13.699230 6.682312 1.083436
0.200666 0.203701 0.171444 0.142299 [error]
Peak 0.041681 0.000755 0.034312 -0.003305
0.009771 0.010190 0.008564 0.007349 [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 4.49e-06 5.57e-06 5.03e-06 7.86e-06 1.78e-05 2.30e-05 erg/cm2
Error 2.08e-07 1.40e-07 1.83e-07 6.42e-07 4.25e-07 7.57e-07 erg/cm2
Peak flux Power-law 1.60e-01 1.80e-01 1.44e-01 1.93e-01 5.55e-01 6.77e-01 ph/cm2/s
Error 1.19e-01 8.09e-02 6.58e-02 2.11e-01 2.17e-01 2.62e-01 ph/cm2/s
Fluence Cutoff-PL 4.50e-06 5.58e-06 5.02e-06 7.78e-06 1.78e-05 2.29e-05 erg/cm2
Error 2.26e-07 1.37e-07 1.84e-07 1.18e-06 3.38e-07 1.30e-06 erg/cm2
Peak flux Cutoff-PL 1.67e-01 1.82e-01 1.42e-01 1.82e-01 5.58e-01 6.76e-01 ph/cm2/s
Error 1.15e-01 8.18e-02 6.96e-02 2.37e-01 2.18e-01 2.89e-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 2.149 0.052 - - 1.88e-03 4.83e-05 53.150 57
CPL 1.996 -0.951 1.5 0.6 2.22e-03 1.20e-04 55.470 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.316 0.788 - - 4.64e-03 1.73e-03 57.960 57
CPL 1.330 0.892 9999.4 0.0 4.63e-03 2.77e-02 57.960 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 1013.320 -209.592 803.728
T90 893.096 -121.308 771.788
T50 443.556 172.152 615.708
Peak 1.000 801.340 802.340
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
83.5953 +21.7636 0.0073 0.1 147.2 29.6059 26.5 TRIG_01205401
------------------------------------------
Foreground time interval of the image:
-134.199 678.601 (delta_t = 812.800 [sec])
Background time interval of the image:
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
-209.592000 731.570000
733.000000 803.728000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.14897 ( -0.0522277 0.0526385 )
Norm@50keV : 1.88272E-03 ( -4.83371e-05 4.8164e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.15 using 59 PHA bins.
# Reduced chi-squared = 0.9325 for 57 degrees of freedom
# Null hypothesis probability = 6.201597e-01
Photon flux (15-150 keV) in 1012 sec: 0.303564 ( -0.00873671 0.00880453 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.77958e-05 ( -4.25059e-07 4.2545e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-209.592000 731.570000
733.000000 803.728000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.99572 ( -0.092747 -1.99572 )
Epeak [keV] : 1.48725 ( -0.409824 0.86564 )
Norm@50keV : 2.21509E-03 ( -0.000118957 0.000120258 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.47 using 59 PHA bins.
# Reduced chi-squared = 0.9905 for 56 degrees of freedom
# Null hypothesis probability = 4.949749e-01
Photon flux (15-150 keV) in 1012 sec: 0.303480 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.7791e-05 ( -2.55732e-07 4.19879e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-209.592000 731.570000
733.000000 803.728000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.86960 ( 1.86022 1.86022 )
beta : -2.15843 ( -0.0620049 0.0594004 )
Epeak [keV] : 13.7547 ( -14.4621 51.5057 )
Norm@50keV : 2.90371E-03 ( -0.000812092 1393.72 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.87 using 59 PHA bins.
# Reduced chi-squared = 0.9613 for 55 degrees of freedom
# Null hypothesis probability = 5.564591e-01
Photon flux (15-150 keV) in 1012 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] : 11.4266 ( )
R^2/D10^2 : 7.19873E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 513.49 using 59 PHA bins.
# Reduced chi-squared = 9.0085 for 57 degrees of freedom
# Null hypothesis probability = 1.120214e-74
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.001e-06 9.715e-08
25- 50 5.935e-06 1.796e-07
50-150 4.503e-06 2.348e-07
15-150 1.244e-05 3.390e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 65.7923 (-4.93971 5.57543)
Norm : 1.42020 (-0.0704279 0.0750944)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.661e-06 1.513e-07
25- 50 5.725e-06 1.457e-07
50-150 7.015e-06 3.491e-07
15-150 1.640e-05 3.997e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.95529 (-0.412682 0.429242)
R1^2/D10^2 : 0.757340 (-0.189409 0.271068)
kT2 [keV] : 21.7448 (-1.69541 2.02578)
R2^2/D10^2 : 4.44251E-03 (-0.00131191 0.00171464)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.968e-06 3.157e-07
25- 50 5.582e-06 2.383e-07
50-150 7.646e-06 5.510e-07
15-150 1.720e-05 8.450e-07
Peak spectrum fit
Power-law model
Time interval is from 801.340 sec. to 802.340 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.31578 ( -0.806307 0.770478 )
Norm@50keV : 4.63780E-03 ( -0.00172619 0.00172479 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.96 using 59 PHA bins.
# Reduced chi-squared = 1.017 for 57 degrees of freedom
# Null hypothesis probability = 4.397424e-01
Photon flux (15-150 keV) in 1 sec: 0.554925 ( -0.21589 0.217353 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.56568e-08 ( -1.87582e-08 1.91392e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 801.340 sec. to 802.340 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.33009 ( -1.02296 0.760276 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 4.62896E-03 ( -0.00465384 0.0507611 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.96 using 59 PHA bins.
# Reduced chi-squared = 1.035 for 56 degrees of freedom
# Null hypothesis probability = 4.027647e-01
Photon flux (15-150 keV) in 1 sec: 0.558377 ( -0.221267 0.21388 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.57159e-08 ( -1.8802e-08 1.88224e-08 ) ergs/cm2
Band function
Time interval is from 801.340 sec. to 802.340 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.99597 ( 1.99598 1.99598 )
beta : -1.30888 ( 1.30988 0.800639 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 4.63835E-03 ( -0.00173035 0.0017273 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.96 using 59 PHA bins.
# Reduced chi-squared = 1.054 for 55 degrees of freedom
# Null hypothesis probability = 3.667461e-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] : 23.0349 (-9.20421 21.3299)
R^2/D10^2 : 1.52239E-02 (-0.0152228 0.0652084)
(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 1.463e-09 9.700e-10
25- 50 7.943e-09 5.355e-09
50-150 3.148e-08 2.065e-08
15-150 4.089e-08 2.756e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-199.363 -199.363)
Norm : 2.29793 (-0.868472 0.868493)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.722e-09 3.772e-09
25- 50 1.101e-08 6.905e-09
50-150 2.414e-08 1.522e-08
15-150 4.087e-08 2.638e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.84670 (-3.84541 4.44564)
R1^2/D10^2 : 7.65289 (-7.46527 132800)
kT2 [keV] : 28.4405 (-11.5111 50.8675)
R2^2/D10^2 : 7.27698E-03 (-0.00673096 0.0147989)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.692e-09 4.417e-09
25- 50 7.586e-09 4.426e-09
50-150 3.341e-08 2.164e-08
15-150 4.769e-08 2.558e-08
Plot creation:
Sun Dec 31 17:30:04 EST 2023