batgrbproduct analysis for trigger=1104692
batgrbproduct Analysis for Trigger=1104692
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 Apr 30 19:56:06 EDT 2022
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1104692/batgroup_hand_proc
======================================================================
Trigger: 01104692 Segment: 000
BAT Trigger Time: 673019625.024 [s; MET]
Trigger Stop: 673019626.048 [s; MET]
UTC: 2022-04-30T13:53:15.969080 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 97.6105079123594 Dec: 9.51011902952678 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.24
Image Trigger?: NO
Rate S/N Ratio: 22.7596133534821 [ if not an image trigger ]
Image S/N Ratio: 7.24
Flight Position: [ source = BAT ]
RA: 97.6105079123594 Dec: 9.51011902952678 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 97.6162708649774 Dec: 9.54725198680646 [deg; J2000]
{ 06h 30m 27.9s , +09d 32' 50.1" }
+/- 0.703015186121195 [arcmin] (estimated 90% radius based on SNR)
+/- 0.222919695199957 [arcmin] (formal 1-sigma fit error)
SNR: 50.3199531221127
Angular difference between Flight and Ground position is 2.253923 arcmin
Partial Coding Fraction: 1 [ including projection effects ]
Duration
T90: 43.1039998531342 +/- 0.567619589088667
Measured from: 12.1119999885559
to: 55.2159998416901 [s; relative to TRIGTIME]
T50: 10.7039999961853 +/- 0.0877268988477141
Measured from: 34.8279999494553
to: 45.5319999456406 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 42.0039999485016
to: 43.0039999485016 [s; relative to TRIGTIME]
Total Fluence
Measured from: -6.53200006484985
to: 94.3639999628067 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 14.971768 23.477089 21.582116 6.307802
0.089672 0.103353 0.098947 0.070642 [error]
Peak 0.753544 1.345710 1.333154 0.412767
0.016044 0.020588 0.021350 0.014612 [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 4.38e-06 9.42e-06 1.59e-05 6.17e-05 4.37e-05 9.14e-05 erg/cm2
Error 1.22e-07 1.60e-07 1.76e-07 1.58e-06 4.81e-07 1.57e-06 erg/cm2
Peak flux Power-law 7.28e+00 9.19e+00 8.46e+00 1.36e+01 2.96e+01 3.85e+01 ph/cm2/s
Error 3.14e-01 2.37e-01 1.82e-01 6.50e-01 6.26e-01 7.98e-01 ph/cm2/s
Fluence Cutoff-PL 4.24e-06 9.42e-06 1.61e-05 5.66e-05 4.37e-05 8.64e-05 erg/cm2
Error 1.79e-07 1.62e-07 2.32e-07 3.52e-06 4.87e-07 3.20e-06 erg/cm2
Peak flux Cutoff-PL 6.85e+00 9.25e+00 8.67e+00 1.12e+01 2.92e+01 3.60e+01 ph/cm2/s
Error 4.23e-01 2.44e-01 2.34e-01 1.53e+00 6.65e-01 1.72e+00 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 1.243 0.021 - - 4.32e-02 5.48e-04 22.500 57
CPL 1.153 0.086 633.5 3220.7 4.67e-02 2.60e-03 19.260 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.121 0.036 - - 2.54e-01 5.12e-03 53.810 57
CPL 0.914 0.148 313.3 323.2 3.12e-01 4.43e-02 47.860 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: 41.216000 sec.
T50 in the 50-300 keV band: 10.112000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 100.896 -6.532 94.364
T90 43.104 12.112 55.216
T50 10.704 34.828 45.532
Peak 1.000 42.004 43.004
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
97.6163 +9.5473 0.0038 1.4 -54.1 3.3183 50.3 TRIG_01104692
------------------------------------------
Foreground time interval of the image:
-6.532 11.877 (delta_t = 18.409 [sec])
Background time interval of the image:
-204.024 -6.532 (delta_t = 197.492 [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 -6.532 sec. to 94.364 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.24320 ( -0.0208118 0.0207196 )
Norm@50keV : 4.32355E-02 ( -0.000548449 0.000547153 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 22.50 using 59 PHA bins.
# Reduced chi-squared = 0.3947 for 57 degrees of freedom
# Null hypothesis probability = 9.999885e-01
Photon flux (15-150 keV) in 100.9 sec: 5.10798 ( -0.0745081 0.0747447 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.37379e-05 ( -4.81305e-07 4.81301e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -6.532 sec. to 94.364 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.15263 ( -0.0869833 0.0845341 )
Epeak [keV] : 633.540 ( -273.252 6168.23 )
Norm@50keV : 4.66961E-02 ( -0.00168876 0.00350226 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 19.26 using 59 PHA bins.
# Reduced chi-squared = 0.3440 for 56 degrees of freedom
# Null hypothesis probability = 9.999989e-01
Photon flux (15-150 keV) in 100.9 sec: 5.06605 ( -0.08306 0.08164 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.36836e-05 ( -4.86742e-07 4.86641e-07 ) ergs/cm2
Band function
Time interval is from -6.532 sec. to 94.364 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.728209 ( -0.360904 5.13925 )
beta : -1.26317 ( 1.26317 0.0284766 )
Epeak [keV] : 93.6018 ( -49.7814 254.043 )
Norm@50keV : 8.48694E-02 ( -0.035298 0.254552 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 18.48 using 59 PHA bins.
# Reduced chi-squared = 0.3360 for 55 degrees of freedom
# Null hypothesis probability = 9.999991e-01
Photon flux (15-150 keV) in 100.9 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] : 24.2639 ( )
R^2/D10^2 : 0.120569 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 1476.19 using 59 PHA bins.
# Reduced chi-squared = 25.8980 for 57 degrees of freedom
# Null hypothesis probability = 3.810875e-271
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.264e-06 3.128e-08
25- 50 7.059e-06 1.372e-07
50-150 3.093e-05 3.935e-07
15-150 3.926e-05 4.591e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 23.4539 ( )
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.893e-06 8.122e-08
25- 50 1.134e-05 1.665e-07
50-150 2.486e-05 3.178e-07
15-150 4.209e-05 5.499e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.12368 (-0.454157 0.475289)
R1^2/D10^2 : 1.80938 (-0.277439 0.338823)
kT2 [keV] : 36.5542 (-1.50232 1.73449)
R2^2/D10^2 : 2.64636E-02 (-0.00381827 0.00408232)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.470e-06 1.584e-07
25- 50 9.722e-06 2.280e-07
50-150 3.026e-05 5.095e-07
15-150 4.346e-05 6.104e-07
Peak spectrum fit
Power-law model
Time interval is from 42.004 sec. to 43.004 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.12061 ( -0.0363328 0.0362473 )
Norm@50keV : 0.254340 ( -0.00511807 0.00511444 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.81 using 59 PHA bins.
# Reduced chi-squared = 0.9440 for 57 degrees of freedom
# Null hypothesis probability = 5.956357e-01
Photon flux (15-150 keV) in 1 sec: 29.5634 ( -0.625466 0.626265 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.64196e-06 ( -5.58664e-08 5.59165e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 42.004 sec. to 43.004 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.913584 ( -0.150083 0.145437 )
Epeak [keV] : 313.264 ( -105.594 540.872 )
Norm@50keV : 0.311615 ( -0.0405254 0.0480029 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.86 using 59 PHA bins.
# Reduced chi-squared = 0.8546 for 56 degrees of freedom
# Null hypothesis probability = 7.722613e-01
Photon flux (15-150 keV) in 1 sec: 29.2214 ( -0.6639 0.6656 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.62113e-06 ( 0 0 ) ergs/cm2
Band function
Time interval is from 42.004 sec. to 43.004 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.92346E-02 ( -1.10493 1.93641 )
beta : -1.17858 ( -0.227823 0.0523733 )
Epeak [keV] : 62.4083 ( -30.5988 149.25 )
Norm@50keV : 1.23841 ( -0.775316 366.841 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.14 using 59 PHA bins.
# Reduced chi-squared = 0.8207 for 55 degrees of freedom
# Null hypothesis probability = 8.260066e-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] : 21.4703 ( )
R^2/D10^2 : 1.10209 ( )
(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 9.506e-08 4.120e-09
25- 50 4.954e-07 1.440e-08
50-150 1.704e-06 5.550e-08
15-150 2.295e-06 5.250e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 125.030 ( )
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.113e-07 6.150e-09
25- 50 5.989e-07 1.245e-08
50-150 1.314e-06 3.000e-08
15-150 2.224e-06 4.650e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.12353 (-0.848665 0.919679)
R1^2/D10^2 : 9.65435 (-2.31697 3.3003)
kT2 [keV] : 35.9761 (-3.13875 4.26423)
R2^2/D10^2 : 0.176778 (-0.0532656 0.0624064)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.894e-07 1.410e-08
25- 50 5.519e-07 2.555e-08
50-150 1.884e-06 9.900e-08
15-150 2.625e-06 1.085e-07
Plot creation:
Sat Apr 30 20:09:22 EDT 2022