batgrbproduct analysis for trigger=1120270
batgrbproduct Analysis for Trigger=1120270
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 Aug 14 17:05:19 EDT 2022
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1120270/GCN5_download_cron
======================================================================
Trigger: 01120270 Segment: 000
BAT Trigger Time: 682111413.248 [s; MET]
Trigger Stop: 682111417.344 [s; MET]
UTC: 2022-08-13T19:23:03.576540 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 81.5009850183749 Dec: -32.9854787271802 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.31
Image Trigger?: NO
Rate S/N Ratio: 14.6969384566991 [ if not an image trigger ]
Image S/N Ratio: 9.31
Flight Position: [ source = BAT ]
RA: 81.5009850183749 Dec: -32.9854787271802 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 81.5320029074518 Dec: -33.0181229146065 [deg; J2000]
{ 05h 26m 07.7s , -33d 01' 05.2" }
+/- 1.59724765102737 [arcmin] (estimated 90% radius based on SNR)
+/- 0.749362100161353 [arcmin] (formal 1-sigma fit error)
SNR: 15.5806862664485
Angular difference between Flight and Ground position is 2.504475 arcmin
Partial Coding Fraction: 0.9609375 [ including projection effects ]
Duration
T90: 16.5879999399185 +/- 1.91377848255831
Measured from: -8.41999995708466
to: 8.16799998283386 [s; relative to TRIGTIME]
T50: 6.60799992084503 +/- 3.81430617709851
Measured from: -0.899999856948853
to: 5.70800006389618 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 1.87599992752075
to: 2.87599992752075 [s; relative to TRIGTIME]
Total Fluence
Measured from: -9.62800002098083
to: 8.87199997901917 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.175458 0.293233 0.234420 0.058304
0.027601 0.029011 0.026112 0.023936 [error]
Peak 0.015082 0.032971 0.029070 0.010626
0.006346 0.006951 0.006338 0.005763 [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 5.69e-08 1.10e-07 1.65e-07 5.35e-07 4.65e-07 8.67e-07 erg/cm2
Error 1.04e-08 1.26e-08 2.48e-08 1.70e-07 6.05e-08 1.90e-07 erg/cm2
Peak flux Power-law 1.71e-01 2.03e-01 1.74e-01 2.54e-01 6.38e-01 8.02e-01 ph/cm2/s
Error 7.18e-02 5.32e-02 4.97e-02 1.53e-01 1.52e-01 2.07e-01 ph/cm2/s
Fluence Cutoff-PL 4.78e-08 1.22e-07 1.73e-07 1.46e-07 4.28e-07 4.89e-07 erg/cm2
Error 1.29e-08 1.63e-08 2.84e-08 1.75e-07 6.60e-08 1.85e-07 erg/cm2
Peak flux Cutoff-PL 1.22e-01 2.20e-01 1.98e-01 8.29e-02 5.99e-01 6.23e-01 ph/cm2/s
Error 1.12e-01 6.49e-02 6.32e-02 2.36e-01 1.66e-01 2.56e-01 ph/cm2/s
Fluence Band 5.02e-08 1.23e-07 1.79e-07 1.88e-07 4.51e-07 5.20e-07 erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 1.38e-01 2.13e-01 1.93e-01 1.27e-01 6.20e-01 6.77e-01 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 1.415 0.191 - - 2.61e-03 3.00e-04 55.260 57
CPL 0.378 0.962 77.4 68.7 8.71e-03 1.29e-02 50.830 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.220 0.410 - - 5.42e-03 1.29e-03 44.570 57
CPL -0.194 2.745 83.8 0.0 2.47e-02 6.67e-01 43.190 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: 7.040000 sec.
T50 in the 50-300 keV band: 4.416000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 18.500 -9.628 8.872
T90 16.588 -8.420 8.168
T50 6.608 -0.900 5.708
Peak 1.000 1.876 2.876
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
81.5320 -33.0181 0.0123 11.3 -65.0 0.8576 15.6 TRIG_01120270
------------------------------------------
Foreground time interval of the image:
-9.628 8.872 (delta_t = 18.500 [sec])
Background time interval of the image:
-239.248 -9.628 (delta_t = 229.620 [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 -9.628 sec. to 8.872 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.41516 ( -0.189303 0.192035 )
Norm@50keV : 2.60687E-03 ( -0.000300703 0.000298582 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.26 using 59 PHA bins.
# Reduced chi-squared = 0.9694 for 57 degrees of freedom
# Null hypothesis probability = 5.408083e-01
Photon flux (15-150 keV) in 18.5 sec: 0.318578 ( -0.0354193 0.0354383 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.64585e-07 ( -5.99937e-08 6.09793e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -9.628 sec. to 8.872 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.378456 ( -1.06957 0.855096 )
Epeak [keV] : 77.4270 ( -18.1954 119.288 )
Norm@50keV : 8.71185E-03 ( -0.00541438 0.0202911 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.83 using 59 PHA bins.
# Reduced chi-squared = 0.9077 for 56 degrees of freedom
# Null hypothesis probability = 6.702699e-01
Photon flux (15-150 keV) in 18.5 sec: 0.304170 ( -0.03764 0.037438 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.28064e-07 ( -6.45539e-08 6.74214e-08 ) ergs/cm2
Band function
Time interval is from -9.628 sec. to 8.872 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.378586 ( -0.704272 1.14455 )
beta : -10.0000 ( 10 20 )
Epeak [keV] : 77.4138 ( -15.3949 119.778 )
Norm@50keV : 8.71140E-03 ( -0.0054144 0.020309 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.83 using 59 PHA bins.
# Reduced chi-squared = 0.9242 for 55 degrees of freedom
# Null hypothesis probability = 6.345198e-01
Photon flux (15-150 keV) in 18.5 sec: 0.312295 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 4.50656e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 15.4898 (-1.85773 2.16518)
R^2/D10^2 : 3.38130E-02 (-0.0122754 0.0187027)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.36 using 59 PHA bins.
# Reduced chi-squared = 1.006 for 57 degrees of freedom
# Null hypothesis probability = 4.615411e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.124e-08 6.244e-09
25- 50 1.278e-07 2.028e-08
50-150 2.116e-07 4.704e-08
15-150 3.706e-07 5.754e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-61.4614 -200)
Norm : 1.30773 (-0.144214 0.144214)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.025e-08 3.324e-08
25- 50 1.159e-07 6.347e-08
50-150 2.542e-07 1.383e-07
15-150 4.303e-07 2.366e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.25628 (-1.60175 3.61508)
R1^2/D10^2 : 4.81532 (-4.6149 442.724)
kT2 [keV] : 17.5363 (-2.51784 3.90562)
R2^2/D10^2 : 2.07674E-02 (-0.0112848 0.0113238)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.107e-08 2.073e-08
25- 50 1.134e-07 2.994e-08
50-150 2.397e-07 6.993e-08
15-150 4.041e-07 8.963e-08
Peak spectrum fit
Power-law model
Time interval is from 1.876 sec. to 2.876 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.22042 ( -0.407767 0.412016 )
Norm@50keV : 5.41590E-03 ( -0.00128723 0.00128319 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.57 using 59 PHA bins.
# Reduced chi-squared = 0.7820 for 57 degrees of freedom
# Null hypothesis probability = 8.844030e-01
Photon flux (15-150 keV) in 1 sec: 0.637604 ( -0.151526 0.151771 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.46338e-08 ( -1.46493e-08 1.50282e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.876 sec. to 2.876 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.194437 ( -3.89221 1.59807 )
Epeak [keV] : 83.7766 ( -83.697 -83.697 )
Norm@50keV : 2.46802E-02 ( -0.0248034 1.30976 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.19 using 59 PHA bins.
# Reduced chi-squared = 0.7713 for 56 degrees of freedom
# Null hypothesis probability = 8.948498e-01
Photon flux (15-150 keV) in 1 sec: 0.598902 ( -0.168676 0.162804 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.03631e-08 ( -1.56951e-08 1.64088e-08 ) ergs/cm2
Band function
Time interval is from 1.876 sec. to 2.876 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.203437 ( -1.51456 3.89252 )
beta : -10.0000 ( 10 20 )
Epeak [keV] : 83.6290 ( -25.2035 257.702 )
Norm@50keV : 2.48932E-02 ( -0.0248931 1.30889 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.19 using 59 PHA bins.
# Reduced chi-squared = 0.7853 for 55 degrees of freedom
# Null hypothesis probability = 8.756174e-01
Photon flux (15-150 keV) in 1 sec: 0.619665 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 5.31549e-08 ( 0 0 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 17.9606 (-4.08009 5.89725)
R^2/D10^2 : 4.35306E-02 (-0.0265492 0.0587148)
(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 2.813e-09 1.479e-09
25- 50 1.299e-08 6.567e-09
50-150 3.040e-08 1.606e-08
15-150 4.620e-08 1.776e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-91.4441 -199.363)
Norm : 2.59720 (-0.621084 0.621089)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.467e-09 3.905e-09
25- 50 1.244e-08 7.380e-09
50-150 2.728e-08 1.614e-08
15-150 4.619e-08 2.741e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.23794 (-1.18584 2.00912)
R1^2/D10^2 : 2.99836E+04 (-27668.3 -27671)
kT2 [keV] : 19.0730 (-4.43448 6.88851)
R2^2/D10^2 : 3.47032E-02 (-0.0221008 0.0483449)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.793e-09 1.365e-09
25- 50 1.200e-08 6.197e-09
50-150 3.192e-08 1.642e-08
15-150 4.771e-08 2.518e-08
Plot creation:
Sun Aug 14 17:08:30 EDT 2022