batgrbproduct analysis for trigger=1116441
batgrbproduct Analysis for Trigger=1116441
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): Sat Jul 16 20:56:27 EDT 2022
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1116441/GCN5_download_cron
======================================================================
Trigger: 01116441 Segment: 000
BAT Trigger Time: 679616711.68 [s; MET]
Trigger Stop: 679616712.704 [s; MET]
UTC: 2022-07-15T22:24:42.178080 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 254.88862245431 Dec: -33.5970201018269 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 11.46
Image Trigger?: NO
Rate S/N Ratio: 24.8596057893121 [ if not an image trigger ]
Image S/N Ratio: 11.46
Flight Position: [ source = BAT ]
RA: 254.88862245431 Dec: -33.5970201018269 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 254.860319538028 Dec: -33.586184585732 [deg; J2000]
{ 16h 59m 26.5s , -33d 35' 10.3" }
+/- 1.05336461781637 [arcmin] (estimated 90% radius based on SNR)
+/- 0.428594660185856 [arcmin] (formal 1-sigma fit error)
SNR: 28.2398936260168
Angular difference between Flight and Ground position is 1.556829 arcmin
Partial Coding Fraction: 0.953125 [ including projection effects ]
Duration
T90: 40.4039999246597 +/- 1.24230755843936
Measured from: 0.400000214576721
to: 40.8040001392365 [s; relative to TRIGTIME]
T50: 11.9959999322891 +/- 3.25775445149779
Measured from: 3.75200021266937
to: 15.7480001449585 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.0759999752044678
to: 0.924000024795532 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.148000001907349
to: 42.1720000505447 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.484537 0.721420 0.539359 0.148101
0.043925 0.041798 0.035145 0.029184 [error]
Peak 0.038411 0.055233 0.062111 0.035400
0.006901 0.007030 0.006605 0.005427 [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 1.37e-07 2.75e-07 4.29e-07 1.47e-06 1.20e-06 2.31e-06 erg/cm2
Error 1.61e-08 1.93e-08 3.38e-08 2.58e-07 8.37e-08 2.80e-07 erg/cm2
Peak flux Power-law 2.36e-01 3.65e-01 4.23e-01 9.45e-01 1.30e+00 1.97e+00 ph/cm2/s
Error 6.99e-02 6.30e-02 5.05e-02 2.81e-01 1.57e-01 2.77e-01 ph/cm2/s
Fluence Cutoff-PL 1.29e-07 2.85e-07 4.38e-07 8.54e-07 1.16e-06 1.71e-06 erg/cm2
Error 1.91e-08 2.33e-08 3.68e-08 4.89e-07 9.60e-08 4.50e-07 erg/cm2
Peak flux Cutoff-PL 2.43e-01 3.70e-01 4.22e-01 9.09e-01 1.31e+00 1.94e+00 ph/cm2/s
Error 7.02e-02 6.31e-02 5.09e-02 3.05e-01 1.58e-01 3.01e-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 1.359 0.112 - - 2.90e-03 1.84e-04 74.230 57
CPL 1.000 0.453 140.9 -42.9 4.38e-03 2.44e-03 72.370 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.785 0.240 - - 1.13e-02 1.41e-03 51.060 57
CPL 0.778 0.243 10000.0 0.0 1.14e-02 1.37e-03 51.120 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: 40.832000 sec.
T50 in the 50-300 keV band: 15.488000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 42.320 -0.148 42.172
T90 40.404 0.400 40.804
T50 11.996 3.752 15.748
Peak 1.000 -0.076 0.924
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
254.8603 -33.5862 0.0068 12.5 43.3 1.3836 28.2 TRIG_01116441
------------------------------------------
Foreground time interval of the image:
-0.148 16.021 (delta_t = 16.169 [sec])
Background time interval of the image:
-239.680 -234.630 (delta_t = 5.050 [sec])
-189.680 -167.330 (delta_t = 22.350 [sec])
-166.680 -62.530 (delta_t = 104.150 [sec])
-61.680 -0.148 (delta_t = 61.532 [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 -0.148 sec. to 42.172 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.35906 ( -0.112693 0.111944 )
Norm@50keV : 2.89823E-03 ( -0.000183753 0.000183668 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.23 using 59 PHA bins.
# Reduced chi-squared = 1.302 for 57 degrees of freedom
# Null hypothesis probability = 6.228306e-02
Photon flux (15-150 keV) in 42.32 sec: 0.349811 ( -0.0229525 0.0229954 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.19551e-06 ( -8.34267e-08 8.39074e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.148 sec. to 42.172 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00030 ( -0.502232 0.403957 )
Epeak [keV] : 140.881 ( -55.144 -140.901 )
Norm@50keV : 4.37970E-03 ( -0.00157187 0.00331468 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.37 using 59 PHA bins.
# Reduced chi-squared = 1.292 for 56 degrees of freedom
# Null hypothesis probability = 6.951963e-02
Photon flux (15-150 keV) in 42.32 sec: 0.343668 ( -0.024234 0.024199 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.15976e-06 ( -9.65615e-08 9.54274e-08 ) ergs/cm2
Band function
Time interval is from -0.148 sec. to 42.172 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.95283 ( -5.35912 -4.95283 )
beta : -1.49908 ( -0.162103 0.136654 )
Epeak [keV] : 28.6128 ( -4.74087 3.68763 )
Norm@50keV : 113.129 ( -7.10473 251.986 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.66 using 59 PHA bins.
# Reduced chi-squared = 1.212 for 55 degrees of freedom
# Null hypothesis probability = 1.347524e-01
Photon flux (15-150 keV) in 42.32 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] : 15.8049 (-1.26403 1.42236)
R^2/D10^2 : 3.36842E-02 (-0.00872728 0.0114376)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 113.19 using 59 PHA bins.
# Reduced chi-squared = 1.9857 for 57 degrees of freedom
# Null hypothesis probability = 1.383203e-05
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.382e-08 9.945e-09
25- 50 3.074e-07 2.556e-08
50-150 5.341e-07 6.771e-08
15-150 9.153e-07 7.089e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-21.3296 -200)
Norm : 1.45348 (-0.0922016 0.0922016)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.532e-07 1.130e-08
25- 50 2.946e-07 2.562e-08
50-150 6.462e-07 1.563e-07
15-150 1.094e-06 1.644e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 10.6489 (-2.03099 1.72615)
R1^2/D10^2 : 0.102962 (-0.0388528 0.0518272)
kT2 [keV] : 60.9257 (-29.1544 -61.2682)
R2^2/D10^2 : 3.63165E-04 (-0.000272843 0.00188463)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.078e-07 1.970e-08
25- 50 3.178e-07 6.242e-08
50-150 7.552e-07 3.383e-07
15-150 1.181e-06 3.877e-07
Peak spectrum fit
Power-law model
Time interval is from -0.076 sec. to 0.924 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.784978 ( -0.247356 0.232664 )
Norm@50keV : 1.13273E-02 ( -0.00143025 0.00139146 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.06 using 59 PHA bins.
# Reduced chi-squared = 0.8957 for 57 degrees of freedom
# Null hypothesis probability = 6.964250e-01
Photon flux (15-150 keV) in 1 sec: 1.30262 ( -0.156772 0.157285 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.33212e-07 ( -1.66256e-08 1.67042e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.076 sec. to 0.924 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.778486 ( -0.267153 0.218678 )
Epeak [keV] : 1.00000E+04 ( -10000 -10000 )
Norm@50keV : 1.14094E-02 ( -0.00143539 0.00130002 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.12 using 59 PHA bins.
# Reduced chi-squared = 0.9129 for 56 degrees of freedom
# Null hypothesis probability = 6.596297e-01
Photon flux (15-150 keV) in 1 sec: 1.30746 ( -0.16277 0.15284 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.33044e-07 ( -1.6449e-08 1.5804e-08 ) ergs/cm2
Band function
Time interval is from -0.076 sec. to 0.924 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99999 ( -4.99999 -4.99999 )
beta : -0.791256 ( -0.243714 0.249039 )
Epeak [keV] : 22.7929 ( -22.7929 55.2342 )
Norm@50keV : 1054.75 ( -120.134 1.63724e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.97 using 59 PHA bins.
# Reduced chi-squared = 0.9268 for 55 degrees of freedom
# Null hypothesis probability = 6.291748e-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] : 30.0147 (-6.00357 8.99798)
R^2/D10^2 : 1.88032E-02 (-0.018671 0.0168478)
(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 2.649e-09 7.490e-10
25- 50 1.635e-08 3.820e-09
50-150 1.040e-07 2.409e-08
15-150 1.230e-07 2.451e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-23.5667 -200)
Norm : 5.24652 (-0.649141 0.649141)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.306e-08 7.345e-09
25- 50 2.512e-08 1.396e-08
50-150 5.509e-08 3.062e-08
15-150 9.328e-08 5.160e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.48738 (-3.69203 4.80884)
R1^2/D10^2 : 0.415744 (-0.266278 1.78802)
kT2 [keV] : 93.7111 (-52.333 -94.2373)
R2^2/D10^2 : 1.17631E-03 (-0.00100816 0.00580061)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.135e-09 4.617e-09
25- 50 2.254e-08 1.203e-08
50-150 1.092e-07 1.006e-07
15-150 1.399e-07 1.184e-07
Plot creation:
Sat Jul 16 20:59:37 EDT 2022