batgrbproduct analysis for trigger=1111242
batgrbproduct Analysis for Trigger=1111242
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): Wed Jun 22 19:58:16 EDT 2022
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1111242/GCN5_download_cron
======================================================================
Trigger: 01111242 Segment: 000
BAT Trigger Time: 677517600 [s; MET]
Trigger Stop: 677517664 [s; MET]
UTC: 2022-06-21T15:19:30.640320 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 103.828627396593 Dec: -1.47908571336157 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.5
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 8.5
Flight Position: [ source = BAT ]
RA: 103.828627396593 Dec: -1.47908571336157 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 103.851270382561 Dec: -1.43845280526813 [deg; J2000]
{ 06h 55m 24.3s , -01d 26' 18.4" }
+/- 4.45234779607142 [arcmin] (estimated 90% radius based on SNR)
+/- 2.58473946324818 [arcmin] (formal 1-sigma fit error)
SNR: 3.60215626140383
Angular difference between Flight and Ground position is 2.790746 arcmin
Partial Coding Fraction: 0.75 [ including projection effects ]
Duration
T90: 100.991999864578 +/- 26.3805989131371
Measured from: 6.12000012397766
to: 107.111999988556 [s; relative to TRIGTIME]
T50: 53.6319998502731 +/- 28.6686427172148
Measured from: 28.9680001735687
to: 82.6000000238419 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 9.3639999628067
to: 10.3639999628067 [s; relative to TRIGTIME]
Total Fluence
Measured from: 2.21599996089935
to: 112.871999979019 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.987255 0.700699 0.122330 0.091927
0.081975 0.083895 0.072136 0.065061 [error]
Peak 0.021359 0.019373 0.016073 0.007515
0.008051 0.008146 0.006639 0.006393 [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 2.80e-07 2.80e-07 1.97e-07 2.19e-07 8.44e-07 9.77e-07 erg/cm2
Error 3.98e-08 4.08e-08 5.63e-08 1.15e-07 1.35e-07 2.02e-07 erg/cm2
Peak flux Power-law 2.00e-01 1.67e-01 9.43e-02 7.90e-02 4.96e-01 5.40e-01 ph/cm2/s
Error 1.13e-01 6.20e-02 7.48e-02 1.05e-01 1.85e-01 2.04e-01 ph/cm2/s
Fluence Cutoff-PL 2.78e-07 3.24e-07 1.02e-07 5.34e-09 7.10e-07 7.10e-07 erg/cm2
Error 4.31e-08 5.42e-08 7.62e-08 3.41e-08 1.24e-07 1.31e-07 erg/cm2
Peak flux Cutoff-PL 2.04e-01 1.67e-01 9.30e-02 7.53e-02 4.97e-01 5.40e-01 ph/cm2/s
Error 1.17e-01 6.19e-02 5.64e-02 1.04e-01 1.85e-01 2.05e-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 2.510 0.262 - - 7.77e-04 1.65e-04 72.970 57
CPL 0.463 1.623 23.2 0.0 1.97e-02 0.00e+00 67.170 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.822 0.772 - - 3.57e-03 1.62e-03 65.690 57
CPL 1.818 3.350 584.7 0.0 3.58e-03 0.00e+00 65.700 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 110.656 2.216 112.872
T90 100.992 6.120 107.112
T50 53.632 28.968 82.600
Peak 1.000 9.364 10.364
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
103.8513 -1.4385 0.0537 20.2 -102.8 0.8644 3.6 TRIG_01111242
------------------------------------------
Foreground time interval of the image:
2.216 48.530 (delta_t = 46.314 [sec])
50.000 51.180 (delta_t = 1.180 [sec])
52.000 112.872 (delta_t = 60.872 [sec])
Background time interval of the image:
-239.000 -226.120 (delta_t = 12.880 [sec])
-188.000 -174.990 (delta_t = 13.010 [sec])
-171.000 -65.800 (delta_t = 105.200 [sec])
-65.000 2.216 (delta_t = 67.216 [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
2.216000 48.530000
50.000000 51.180000
52.000000 112.872000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.50974 ( -0.24938 0.274272 )
Norm@50keV : 7.76806E-04 ( -0.000164025 0.000165962 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.97 using 59 PHA bins.
# Reduced chi-squared = 1.280 for 57 degrees of freedom
# Null hypothesis probability = 7.548731e-02
Photon flux (15-150 keV) in 108.4 sec: 0.153515 ( -0.018764 0.0187789 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.44265e-07 ( -1.31834e-07 1.38259e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
2.216000 48.530000
50.000000 51.180000
52.000000 112.872000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.462556 ( -2.00456 1.24231 )
Epeak [keV] : 23.2055 ( )
Norm@50keV : 1.97111E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.17 using 59 PHA bins.
# Reduced chi-squared = 1.199 for 56 degrees of freedom
# Null hypothesis probability = 1.458218e-01
Photon flux (15-150 keV) in 108.4 sec: 0.148307 ( -0.018258 0.018438 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.09551e-07 ( -1.11425e-07 1.37385e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
2.216000 48.530000
50.000000 51.180000
52.000000 112.872000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.95986 ( -4.81346 -4.95986 )
beta : -3.07307 ( -0.691408 0.442263 )
Epeak [keV] : 21.8712 ( -2.93339 2.43092 )
Norm@50keV : 495.763 ( -58.7141 944.941 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.97 using 59 PHA bins.
# Reduced chi-squared = 1.163 for 55 degrees of freedom
# Null hypothesis probability = 1.905325e-01
Photon flux (15-150 keV) in 108.4 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] : 6.59362 (-0.828852 0.935753)
R^2/D10^2 : 0.382543 (-0.16335 0.293637)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.46 using 59 PHA bins.
# Reduced chi-squared = 1.236 for 57 degrees of freedom
# Null hypothesis probability = 1.085784e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.710e-07 5.978e-08
25- 50 3.296e-07 7.360e-08
50-150 4.378e-08 2.037e-08
15-150 6.444e-07 1.120e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 27.9851 (-6.79165 9.84709)
Norm : 1.32607 (-0.310376 0.430093)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.818e-07 4.352e-08
25- 50 3.096e-07 5.534e-08
50-150 1.544e-07 6.911e-08
15-150 7.459e-07 1.363e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.73845 (-1.81424 1.94497)
R1^2/D10^2 : 1.04081 (-0.6555 4.1546)
kT2 [keV] : 10.9398 (-10.327 -10.952)
R2^2/D10^2 : 2.44035E-02 (-0.0242529 0.215726)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.863e-07 1.581e-07
25- 50 3.112e-07 1.599e-07
50-150 1.288e-07 7.875e-08
15-150 7.263e-07 3.653e-07
Peak spectrum fit
Power-law model
Time interval is from 9.364 sec. to 10.364 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.82213 ( -0.70512 0.839667 )
Norm@50keV : 3.57038E-03 ( -0.0017094 0.0015304 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.69 using 59 PHA bins.
# Reduced chi-squared = 1.153 for 57 degrees of freedom
# Null hypothesis probability = 2.010510e-01
Photon flux (15-150 keV) in 1 sec: 0.496274 ( -0.184632 0.184724 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.28466e-08 ( -1.43975e-08 1.52138e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 9.364 sec. to 10.364 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.81838 ( -2.68637 4.01431 )
Epeak [keV] : 584.702 ( )
Norm@50keV : 3.57929E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.70 using 59 PHA bins.
# Reduced chi-squared = 1.173 for 56 degrees of freedom
# Null hypothesis probability = 1.760845e-01
Photon flux (15-150 keV) in 1 sec: 0.496649 ( -0.184914 0.18422 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.26264e-08 ( -1.45929e-08 1.53036e-08 ) ergs/cm2
Band function
Time interval is from 9.364 sec. to 10.364 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.83271 ( -0.170761 3.50388 )
beta : -9.29518 ( 6.433 9.29518 )
Epeak [keV] : 9999.36 ( -9991.45 -9999.36 )
Norm@50keV : 3.54599E-03 ( -0.0014377 0.141261 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.69 using 59 PHA bins.
# Reduced chi-squared = 1.194 for 55 degrees of freedom
# Null hypothesis probability = 1.531906e-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] : 9.63552 (-4.1796 13.4186)
R^2/D10^2 : 0.256669 (-0.249788 1.99285)
(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 4.787e-09 3.106e-09
25- 50 1.128e-08 7.380e-09
50-150 5.283e-09 3.980e-09
15-150 2.135e-08 1.362e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 103.041 (-104.122 -104.122)
Norm : 2.17066 (-0.904807 1.95718)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.673e-09 3.690e-09
25- 50 9.868e-09 6.170e-09
50-150 1.626e-08 1.306e-08
15-150 3.180e-08 2.074e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.66904 (-5.6738 5.28621)
R1^2/D10^2 : 1.50799 (-1.38468 -1.50572)
kT2 [keV] : 27.4258 (-27.4671 -27.4675)
R2^2/D10^2 : 4.77338E-03 (-0.00473249 0.123731)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.501e-09 4.104e-09
25- 50 8.709e-09 4.973e-09
50-150 1.961e-08 1.206e-08
15-150 3.482e-08 1.955e-08
Plot creation:
Wed Jun 22 20:02:27 EDT 2022