batgrbproduct analysis for trigger=1081113
batgrbproduct Analysis for Trigger=1081113
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 Oct 26 10:13:35 EDT 2021
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1081113/GCN5_download_cron
======================================================================
Trigger: 01081113 Segment: 000
BAT Trigger Time: 656831448 [s; MET]
Trigger Stop: 656831512 [s; MET]
UTC: 2021-10-25T05:10:20.037640 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 162.376906521174 Dec: 31.557366765591 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.05
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 8.05
Flight Position: [ source = BAT ]
RA: 162.376906521174 Dec: 31.557366765591 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 162.385677706187 Dec: 31.51751849242 [deg; J2000]
{ 10h 49m 32.6s , +31d 31' 03.1" }
+/- 2.16082290224362 [arcmin] (estimated 90% radius based on SNR)
+/- 1.27298662992131 [arcmin] (formal 1-sigma fit error)
SNR: 10.1179141060317
Angular difference between Flight and Ground position is 2.432606 arcmin
Partial Coding Fraction: 1.03125 [ including projection effects ]
Duration
T90: 103.511999845505 +/- 27.5596052872907
Measured from: 19.7640001773834
to: 123.276000022888 [s; relative to TRIGTIME]
T50: 40.7560000419617 +/- 17.677282095831
Measured from: 39.7440000772476
to: 80.5000001192093 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 51.6560000181198
to: 52.6560000181198 [s; relative to TRIGTIME]
Total Fluence
Measured from: 12.3159999847412
to: 128.5 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.635428 0.536723 0.302617 0.075755
0.068623 0.071448 0.064913 0.064258 [error]
Peak 0.021106 0.018460 0.017350 0.015748
0.006450 0.006633 0.006139 0.005928 [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 1.64e-07 2.28e-07 2.34e-07 4.38e-07 7.65e-07 1.06e-06 erg/cm2
Error 3.06e-08 3.15e-08 6.13e-08 2.29e-07 1.38e-07 2.97e-07 erg/cm2
Peak flux Power-law 1.41e-01 1.58e-01 1.27e-01 1.68e-01 4.88e-01 5.95e-01 ph/cm2/s
Error 7.92e-02 5.30e-02 5.03e-02 1.53e-01 1.48e-01 1.96e-01 ph/cm2/s
Fluence Cutoff-PL 1.65e-07 2.28e-07 2.32e-07 4.28e-07 7.62e-07 1.05e-06 erg/cm2
Error 3.08e-08 3.44e-08 -------- 3.03e-07 1.44e-07 3.66e-07 erg/cm2
Peak flux Cutoff-PL 1.46e-01 1.60e-01 1.24e-01 1.58e-01 4.89e-01 5.92e-01 ph/cm2/s
Error 7.95e-02 5.31e-02 -------- 1.82e-01 1.48e-01 2.10e-01 ph/cm2/s
Fluence Band 1.73e-07 2.68e-07 2.77e-07 3.38e-07 8.65e-07 1.06e-06 erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 4.87e-02 4.17e-02 2.17e-02 1.04e-02 1.19e-01 1.23e-01 ph/cm2/s
Error -------- -------- 6.34e-03 -------- -------- 2.48e-02 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.962 0.279 - - 7.20e-04 1.35e-04 39.760 57
CPL 2.200 0.000 81.6 0.0 5.43e-04 0.00e+00 39.800 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.320 0.612 - - 4.08e-03 1.26e-03 59.810 57
CPL 1.343 0.617 9999.4 0.0 4.05e-03 1.02e-02 59.820 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 116.184 12.316 128.500
T90 103.512 19.764 123.276
T50 40.756 39.744 80.500
Peak 1.000 51.656 52.656
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
162.3857 +31.5175 0.0190 9.7 -154.0 1.0219 10.1 TRIG_01081113
------------------------------------------
Foreground time interval of the image:
12.316 18.170 (delta_t = 5.854 [sec])
19.000 72.201 (delta_t = 53.201 [sec])
Background time interval of the image:
-239.000 -233.090 (delta_t = 5.910 [sec])
-232.000 -226.370 (delta_t = 5.630 [sec])
-225.000 -87.540 (delta_t = 137.460 [sec])
-86.000 -55.985 (delta_t = 30.015 [sec])
-55.000 12.316 (delta_t = 67.316 [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
12.316000 18.170000
19.000000 128.500000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.96221 ( -0.267783 0.290862 )
Norm@50keV : 7.20365E-04 ( -0.000137263 0.000132176 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.76 using 59 PHA bins.
# Reduced chi-squared = 0.6976 for 57 degrees of freedom
# Null hypothesis probability = 9.599222e-01
Photon flux (15-150 keV) in 115.4 sec: 0.106220 ( -0.014171 0.0141734 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.65332e-07 ( -1.34552e-07 1.40588e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
12.316000 18.170000
19.000000 128.500000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.19967 ( )
Epeak [keV] : 81.5973 ( )
Norm@50keV : 5.43370E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.80 using 59 PHA bins.
# Reduced chi-squared = 0.7107 for 56 degrees of freedom
# Null hypothesis probability = 9.500121e-01
Photon flux (15-150 keV) in 115.4 sec: 0.106166 ( -0.0141634 0.014125 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.6218e-07 ( -1.45822e-07 1.41995e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
12.316000 18.170000
19.000000 128.500000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.07737 ( 1.08244 1.08244 )
beta : -2.00833 ( 2.00651 0.308088 )
Epeak [keV] : 25.6119 ( -24.9879 -24.9879 )
Norm@50keV : 3.37010E-03 ( -0.00341537 194617 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.68 using 59 PHA bins.
# Reduced chi-squared = 0.7215 for 55 degrees of freedom
# Null hypothesis probability = 9.404145e-01
Photon flux (15-150 keV) in 115.4 sec: 0.119083 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 8.6481e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 8.68183 (-1.56484 2.01359)
R^2/D10^2 : 8.14341E-02 (-0.0809217 0.0943344)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.79 using 59 PHA bins.
# Reduced chi-squared = 1.014 for 57 degrees of freedom
# Null hypothesis probability = 4.458538e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.352e-07 3.238e-08
25- 50 2.714e-07 5.660e-08
50-150 9.263e-08 4.053e-08
15-150 4.992e-07 9.746e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 70.6987 (-27.4576 62.0896)
Norm : 0.516787 (-0.101794 0.141283)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.532e-07 2.643e-08
25- 50 2.443e-07 4.016e-08
50-150 3.161e-07 1.516e-07
15-150 7.137e-07 1.734e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.23298 (-1.35228 1.584)
R1^2/D10^2 : 0.461180 (-0.296057 1.1367)
kT2 [keV] : 23.4947 (-7.99539 18.1864)
R2^2/D10^2 : 1.54921E-03 (-0.00129659 0.00430175)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.725e-07 8.991e-08
25- 50 2.101e-07 1.077e-07
50-150 4.059e-07 2.377e-07
15-150 7.885e-07 3.551e-07
Peak spectrum fit
Power-law model
Time interval is from 51.656 sec. to 52.656 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.32032 ( -0.614134 0.609994 )
Norm@50keV : 4.07649E-03 ( -0.00128395 0.00124364 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.81 using 59 PHA bins.
# Reduced chi-squared = 1.049 for 57 degrees of freedom
# Null hypothesis probability = 3.741649e-01
Photon flux (15-150 keV) in 1 sec: 0.488201 ( -0.147368 0.147717 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.00878e-08 ( -1.42002e-08 1.47483e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 51.656 sec. to 52.656 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.34333 ( -0.639098 0.594188 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 4.04685E-03 ( -0.00128564 0.0191112 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.82 using 59 PHA bins.
# Reduced chi-squared = 1.068 for 56 degrees of freedom
# Null hypothesis probability = 3.388630e-01
Photon flux (15-150 keV) in 1 sec: 0.489313 ( -0.14857 0.14668 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.02289e-08 ( -1.43325e-08 1.42486e-08 ) ergs/cm2
Band function
Time interval is from 51.656 sec. to 52.656 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.02229 ( 1.02164 1.02164 )
beta : -1.31808 ( 1.32068 0.615558 )
Epeak [keV] : 51.6871 ( -52.7346 -52.7346 )
Norm@50keV : 7.72855E-03 ( -0.00487489 5.89501 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.81 using 59 PHA bins.
# Reduced chi-squared = 1.087 for 55 degrees of freedom
# Null hypothesis probability = 3.054981e-01
Photon flux (15-150 keV) in 1 sec: 0.119083 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 7.49402e-09 ( 0 0 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 15.9957 (-6.4604 16.0722)
R^2/D10^2 : 4.32740E-02 (-0.042031 0.204864)
(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 2.290e-09 1.475e-09
25- 50 9.632e-09 5.930e-09
50-150 1.722e-08 1.164e-08
15-150 2.915e-08 1.873e-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 : 1.98337 (-0.601919 0.601919)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.939e-09 3.082e-09
25- 50 9.500e-09 5.700e-09
50-150 2.084e-08 1.313e-08
15-150 3.528e-08 2.185e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.78962 (-4.50892 9.67989)
R1^2/D10^2 : 0.388559 (-0.339689 393.618)
kT2 [keV] : 59.4634 (-61.7476 -61.7477)
R2^2/D10^2 : 7.96132E-04 (-0.000675314 0.0446225)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.831e-09 3.348e-09
25- 50 7.390e-09 4.326e-09
50-150 2.886e-08 1.798e-08
15-150 4.108e-08 2.315e-08
Plot creation:
Tue Oct 26 10:19:07 EDT 2021