batgrbproduct analysis for trigger=1159439
batgrbproduct Analysis for Trigger=1159439
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 Mar 12 20:48:14 EDT 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1159439/GCN5_download_cron
======================================================================
Trigger: 01159439 Segment: 000
BAT Trigger Time: 700258120 [s; MET]
Trigger Stop: 700258184 [s; MET]
UTC: 2023-03-11T20:08:09.094080 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 83.5142811851246 Dec: 22.2365583752096 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 11.53
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 11.53
Flight Position: [ source = BAT ]
RA: 83.5142811851246 Dec: 22.2365583752096 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 83.5222910335028 Dec: 22.2278593531237 [deg; J2000]
{ 05h 34m 05.3s , +22d 13' 40.3" }
+/- 1.62058716164171 [arcmin] (estimated 90% radius based on SNR)
+/- 0.57767399481138 [arcmin] (formal 1-sigma fit error)
SNR: 15.2611193380238
Angular difference between Flight and Ground position is 0.685803 arcmin
Partial Coding Fraction: 0.5078125 [ including projection effects ]
Duration
T90: 206.06400001049 +/- 53.3178182863372
Measured from: -23.7279999256134
to: 182.336000084877 [s; relative to TRIGTIME]
T50: 103.883999943733 +/- 34.7310845264363
Measured from: 2.94400012493134
to: 106.828000068665 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 43.3079999685287
to: 44.3079999685287 [s; relative to TRIGTIME]
Total Fluence
Measured from: -30.4400000572205
to: 235.06400001049 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 3.812391 3.209480 1.724603 0.189058
0.146047 0.147228 0.123992 0.104569 [error]
Peak 0.035011 0.039861 0.024709 0.003729
0.011052 0.010556 0.009599 0.007680 [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 1.19e-06 1.43e-06 1.25e-06 1.88e-06 4.54e-06 5.76e-06 erg/cm2
Error 1.02e-07 7.69e-08 1.23e-07 3.78e-07 2.72e-07 4.97e-07 erg/cm2
Peak flux Power-law 3.89e-01 2.50e-01 1.04e-01 5.92e-02 7.73e-01 8.02e-01 ph/cm2/s
Error 1.62e-01 8.65e-02 6.37e-02 7.59e-02 2.53e-01 2.66e-01 ph/cm2/s
Fluence Cutoff-PL 1.18e-06 1.44e-06 1.25e-06 1.74e-06 4.52e-06 5.61e-06 erg/cm2
Error 1.13e-07 8.77e-08 1.25e-07 6.91e-07 3.05e-07 7.92e-07 erg/cm2
Peak flux Cutoff-PL 3.71e-01 2.84e-01 9.35e-02 1.32e-02 7.59e-01 7.62e-01 ph/cm2/s
Error 1.74e-01 1.21e-01 8.55e-02 7.18e-02 2.53e-01 1.92e-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 2.194 0.116 - - 2.07e-03 1.43e-04 52.730 57
CPL 2.204 0.000 911.6 19.4 2.05e-03 1.11e-03 52.750 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.263 0.667 - - 4.51e-03 2.15e-03 81.680 57
CPL 1.201 4.950 27.7 0.0 2.10e-02 0.00e+00 81.230 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 265.504 -30.440 235.064
T90 206.064 -23.728 182.336
T50 103.884 2.944 106.828
Peak 1.000 43.308 44.308
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
83.5223 +22.2279 0.0126 29.1 102.0 3.6957 15.3 TRIG_01159439
------------------------------------------
Foreground time interval of the image:
-16.599 8.310 (delta_t = 24.909 [sec])
9.000 56.340 (delta_t = 47.340 [sec])
57.000 72.230 (delta_t = 15.230 [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
-30.440000 8.310000
9.000000 56.340000
57.000000 72.230000
73.000000 134.140000
151.000000 221.255400
233.000000 233.090000
234.000000 234.030000
235.000000 235.064000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.19361 ( -0.114112 0.117739 )
Norm@50keV : 2.07357E-03 ( -0.000143773 0.000141553 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.73 using 59 PHA bins.
# Reduced chi-squared = 0.9252 for 57 degrees of freedom
# Null hypothesis probability = 6.357474e-01
Photon flux (15-150 keV) in 232.9 sec: 0.342137 ( -0.0192383 0.0193267 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.53654e-06 ( -2.71254e-07 2.73588e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-30.440000 8.310000
9.000000 56.340000
57.000000 72.230000
73.000000 134.140000
151.000000 221.255400
233.000000 233.090000
234.000000 234.030000
235.000000 235.064000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.20411 ( -1.99117 -1.99117 )
Epeak [keV] : 911.587 ( -0.807226 37.9626 )
Norm@50keV : 2.04798E-03 ( -0.000550132 0.00167425 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.75 using 59 PHA bins.
# Reduced chi-squared = 0.9419 for 56 degrees of freedom
# Null hypothesis probability = 5.987051e-01
Photon flux (15-150 keV) in 232.9 sec: 0.341836 ( -0.022035 0.019514 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.51852e-06 ( -3.21239e-07 2.88027e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-30.440000 8.310000
9.000000 56.340000
57.000000 72.230000
73.000000 134.140000
151.000000 221.255400
233.000000 233.090000
234.000000 234.030000
235.000000 235.064000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -3.93797 ( 3.93797 3.93797 )
beta : -2.19361 ( -0.117733 0.114136 )
Epeak [keV] : 4.22493 ( -4.22493 -4.22493 )
Norm@50keV : 0.281827 ( -0.0195402 0.0192396 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.73 using 59 PHA bins.
# Reduced chi-squared = 0.9588 for 55 degrees of freedom
# Null hypothesis probability = 5.617015e-01
Photon flux (15-150 keV) in 232.9 sec: 0.340156 ( ) 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] : 10.0067 ( )
R^2/D10^2 : 0.142874 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 149.43 using 59 PHA bins.
# Reduced chi-squared = 2.6216 for 57 degrees of freedom
# Null hypothesis probability = 3.205811e-10
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.788e-07 6.673e-08
25- 50 1.689e-06 1.041e-07
50-150 8.833e-07 1.336e-07
15-150 3.251e-06 2.061e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 55.8418 (-8.62913 10.8877)
Norm : 1.78159 (-0.18476 0.192575)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.030e-06 8.932e-08
25- 50 1.532e-06 9.141e-08
50-150 1.640e-06 2.027e-07
15-150 4.202e-06 2.725e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.31720 (-0.620683 0.727076)
R1^2/D10^2 : 3.34509 (-1.6874 3.77484)
kT2 [keV] : 16.4248 (-1.99492 2.63035)
R2^2/D10^2 : 1.63230E-02 (-0.00742999 0.0115569)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.224e-06 2.725e-07
25- 50 1.359e-06 2.019e-07
50-150 1.735e-06 2.986e-07
15-150 4.318e-06 7.569e-07
Peak spectrum fit
Power-law model
Time interval is from 43.308 sec. to 44.308 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.26261 ( -0.587521 0.746319 )
Norm@50keV : 4.51382E-03 ( -0.00219176 0.00210101 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 81.68 using 59 PHA bins.
# Reduced chi-squared = 1.433 for 57 degrees of freedom
# Null hypothesis probability = 1.772668e-02
Photon flux (15-150 keV) in 1 sec: 0.772755 ( -0.253479 0.253501 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.28516e-08 ( -1.67541e-08 1.80165e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 43.308 sec. to 44.308 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.20082 ( -9.00624 0.893724 )
Epeak [keV] : 27.7291 ( )
Norm@50keV : 2.09748E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 81.23 using 59 PHA bins.
# Reduced chi-squared = 1.450 for 56 degrees of freedom
# Null hypothesis probability = 1.543705e-02
Photon flux (15-150 keV) in 1 sec: 0.759428 ( -0.251227 0.254582 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.90914e-08 ( -1.61254e-08 2.02177e-08 ) ergs/cm2
Band function
Time interval is from 43.308 sec. to 44.308 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 2.84473 ( -7.23965 -0.963708 )
beta : -2.90087 ( 2.77467 0.999548 )
Epeak [keV] : 26.7357 ( -26.5762 60.6457 )
Norm@50keV : 18.6629 ( -18.6712 334.948 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 80.78 using 59 PHA bins.
# Reduced chi-squared = 1.469 for 55 degrees of freedom
# Null hypothesis probability = 1.336743e-02
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.94846e-08 ( 0 0 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.65148 (-2.41023 3.91859)
R^2/D10^2 : 1.04647 (-1.04487 3.85757)
(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 1.070e-08 6.715e-09
25- 50 1.730e-08 1.100e-08
50-150 3.915e-09 3.303e-09
15-150 3.191e-08 1.981e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 41.6710 (-22.9242 81.502)
Norm : 4.95525 (-2.29592 4.97466)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.153e-08 6.910e-09
25- 50 1.544e-08 9.735e-09
50-150 1.248e-08 9.845e-09
15-150 3.945e-08 2.520e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.67816 (-5.34687 4.67785)
R1^2/D10^2 : 2.65975 (-2.74613 -2.74613)
kT2 [keV] : 17.0172 (-16.9302 -16.9302)
R2^2/D10^2 : 2.28371E-02 (-0.0242858 0.152662)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.189e-08 8.170e-09
25- 50 1.526e-08 9.030e-09
50-150 1.216e-08 7.425e-09
15-150 3.931e-08 2.393e-08
Plot creation:
Sun Mar 12 20:51:48 EDT 2023