batgrbproduct analysis for trigger=1111672
batgrbproduct Analysis for Trigger=1111672
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): Fri Jun 24 11:21:19 EDT 2022
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1111672/GCN5_download_cron
======================================================================
Trigger: 01111672 Segment: 000
BAT Trigger Time: 677660683.776 [s; MET]
Trigger Stop: 677660684.8 [s; MET]
UTC: 2022-06-23T07:04:14.406620 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 145.462239057548 Dec: 75.8284740409551 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 18.9
Image Trigger?: NO
Rate S/N Ratio: 84.4985206971104 [ if not an image trigger ]
Image S/N Ratio: 18.9
Flight Position: [ source = BAT ]
RA: 145.462239057548 Dec: 75.8284740409551 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 145.459186812511 Dec: 75.8233469120708 [deg; J2000]
{ 09h 41m 50.2s , +75d 49' 24.0" }
+/- 0.852394698225409 [arcmin] (estimated 90% radius based on SNR)
+/- 0.258798827614932 [arcmin] (formal 1-sigma fit error)
SNR: 38.2122875705943
Angular difference between Flight and Ground position is 0.310879 arcmin
Partial Coding Fraction: 0.9453125 [ including projection effects ]
Duration
T90: 57.0999999046326 +/- 8.51609296743571
Measured from: -3.25999987125397
to: 53.8400000333786 [s; relative to TRIGTIME]
T50: 24.7119998931885 +/- 3.94232065432792
Measured from: 1.3160001039505
to: 26.027999997139 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.148000001907349
to: 0.851999998092651 [s; relative to TRIGTIME]
Total Fluence
Measured from: -3.8400000333786
to: 73.8400000333786 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.470783 1.954314 1.654620 0.475173
0.058539 0.061050 0.054772 0.046614 [error]
Peak 0.128322 0.203227 0.200567 0.089665
0.008750 0.010590 0.010755 0.009054 [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 3.89e-07 7.90e-07 1.25e-06 4.39e-06 3.47e-06 6.82e-06 erg/cm2
Error 2.81e-08 3.23e-08 5.48e-08 4.54e-07 1.35e-07 4.82e-07 erg/cm2
Peak flux Power-law 1.04e+00 1.37e+00 1.32e+00 2.26e+00 4.47e+00 5.99e+00 ph/cm2/s
Error 1.17e-01 8.93e-02 8.62e-02 3.34e-01 2.46e-01 3.86e-01 ph/cm2/s
Fluence Cutoff-PL 3.90e-07 7.91e-07 1.25e-06 4.21e-06 3.47e-06 6.63e-06 erg/cm2
Error 2.88e-08 3.20e-08 5.44e-08 6.29e-07 1.33e-07 7.53e-07 erg/cm2
Peak flux Cutoff-PL 1.05e+00 1.37e+00 1.31e+00 2.21e+00 4.47e+00 5.94e+00 ph/cm2/s
Error 1.18e-01 8.99e-02 8.68e-02 2.84e-01 2.44e-01 3.34e-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 1.337 0.069 - - 4.62e-03 1.61e-04 58.800 57
CPL 1.337 0.069 9999.4 0.0 4.63e-03 5.22e-04 58.850 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.053 0.105 - - 3.87e-02 2.11e-03 94.370 57
CPL 1.044 0.105 9998.9 0.0 3.89e-02 3.28e-03 94.480 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: 54.272000 sec.
T50 in the 50-300 keV band: 10.112000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 77.680 -3.840 73.840
T90 57.100 -3.260 53.840
T50 24.712 1.316 26.028
Peak 1.000 -0.148 0.852
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
145.4592 +75.8233 0.0050 12.0 41.0 5.5771 38.2 TRIG_01111672
------------------------------------------
Foreground time interval of the image:
-3.840 64.404 (delta_t = 68.244 [sec])
65.224 73.840 (delta_t = 8.616 [sec])
Background time interval of the image:
-239.776 -3.840 (delta_t = 235.936 [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
-3.840000 64.404000
65.224000 73.840000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.33738 ( -0.0687279 0.0686682 )
Norm@50keV : 4.61591E-03 ( -0.000161383 0.000161377 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.80 using 59 PHA bins.
# Reduced chi-squared = 1.032 for 57 degrees of freedom
# Null hypothesis probability = 4.093502e-01
Photon flux (15-150 keV) in 76.86 sec: 0.554661 ( -0.0206376 0.0207101 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.47498e-06 ( -1.34226e-07 1.34884e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-3.840000 64.404000
65.224000 73.840000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.33674 ( -0.0714534 0.0670912 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 4.62628E-03 ( -0.000161918 0.000882178 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.85 using 59 PHA bins.
# Reduced chi-squared = 1.051 for 56 degrees of freedom
# Null hypothesis probability = 3.717174e-01
Photon flux (15-150 keV) in 76.86 sec: 0.554808 ( -0.021053 0.020314 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.47075e-06 ( -1.28594e-07 1.3698e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-3.840000 64.404000
65.224000 73.840000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.11068 ( 1.11068 1.11068 )
beta : -1.33738 ( -0.0686729 0.0687299 )
Epeak [keV] : 27.8143 ( -27.8143 -27.8143 )
Norm@50keV : 9.01606E-03 ( -0.00374964 1030.63 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.80 using 59 PHA bins.
# Reduced chi-squared = 1.069 for 55 degrees of freedom
# Null hypothesis probability = 3.381200e-01
Photon flux (15-150 keV) in 76.86 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] : 18.1577 ( )
R^2/D10^2 : 3.25654E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 250.43 using 59 PHA bins.
# Reduced chi-squared = 4.3935 for 57 degrees of freedom
# Null hypothesis probability = 4.504874e-26
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.648e-07 1.191e-08
25- 50 7.669e-07 3.797e-08
50-150 1.840e-06 1.161e-07
15-150 2.771e-06 1.203e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-6.87322 -200)
Norm : 2.30722 (-0.0813456 0.0813456)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.417e-07 1.702e-08
25- 50 8.497e-07 3.382e-08
50-150 1.863e-06 7.225e-08
15-150 3.155e-06 1.199e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.18852 (-0.940598 1.04159)
R1^2/D10^2 : 0.486837 (-0.179497 0.320394)
kT2 [keV] : 31.2978 (-3.74333 5.35166)
R2^2/D10^2 : 4.59707E-03 (-0.0018232 0.00244227)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.718e-07 4.193e-08
25- 50 7.907e-07 7.859e-08
50-150 2.333e-06 2.475e-07
15-150 3.495e-06 3.324e-07
Peak spectrum fit
Power-law model
Time interval is from -0.148 sec. to 0.852 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.05310 ( -0.104942 0.104228 )
Norm@50keV : 3.87147E-02 ( -0.00210888 0.00210887 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 94.37 using 59 PHA bins.
# Reduced chi-squared = 1.656 for 57 degrees of freedom
# Null hypothesis probability = 1.360046e-03
Photon flux (15-150 keV) in 1 sec: 4.47246 ( -0.245957 0.246076 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.11036e-07 ( -2.66003e-08 2.68296e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.148 sec. to 0.852 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.04428 ( -0.101335 0.108543 )
Epeak [keV] : 9998.86 ( -9999.33 -9999.33 )
Norm@50keV : 3.89304E-02 ( -0.00212183 0.00443064 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 94.48 using 59 PHA bins.
# Reduced chi-squared = 1.687 for 56 degrees of freedom
# Null hypothesis probability = 9.957248e-04
Photon flux (15-150 keV) in 1 sec: 4.47420 ( -0.24414 0.24369 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.09179e-07 ( -2.4942e-08 2.8908e-08 ) ergs/cm2
Band function
Time interval is from -0.148 sec. to 0.852 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.872030 ( 0.87203 0.87203 )
beta : -1.05309 ( 1.05309 0.104974 )
Epeak [keV] : 58.2076 ( -58.2076 -58.2076 )
Norm@50keV : 6.28648E-02 ( -0.0262575 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 94.37 using 59 PHA bins.
# Reduced chi-squared = 1.716 for 55 degrees of freedom
# Null hypothesis probability = 7.591996e-04
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] : 20.5760 ( )
R^2/D10^2 : 0.187683 ( )
(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 1.514e-08 1.975e-09
25- 50 7.683e-08 6.565e-09
50-150 2.420e-07 2.490e-08
15-150 3.340e-07 2.685e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 17.7597 ( )
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.422e-08 2.805e-09
25- 50 8.507e-08 6.235e-09
50-150 1.866e-07 5.275e-08
15-150 3.159e-07 4.715e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.15012 (-1.31972 1.53463)
R1^2/D10^2 : 2.45413 (-1.02096 1.94417)
kT2 [keV] : 48.3087 (-11.0292 24.3611)
R2^2/D10^2 : 1.37804E-02 (-0.00840904 0.0137938)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.348e-08 6.545e-09
25- 50 7.984e-08 1.380e-08
50-150 3.203e-07 9.095e-08
15-150 4.337e-07 1.090e-07
Plot creation:
Fri Jun 24 11:24:24 EDT 2022