batgrbproduct analysis for trigger=1091101
batgrbproduct Analysis for Trigger=1091101
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 Dec 28 17:01:43 EST 2021
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1091101/GCN5_download_cron
======================================================================
Trigger: 01091101 Segment: 000
BAT Trigger Time: 662340755.2 [s; MET]
Trigger Stop: 662340755.456 [s; MET]
UTC: 2021-12-27T23:32:06.866680 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 132.125661624793 Dec: -2.70188941470638 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.71
Image Trigger?: NO
Rate S/N Ratio: 18 [ if not an image trigger ]
Image S/N Ratio: 8.71
Flight Position: [ source = BAT ]
RA: 132.125661624793 Dec: -2.70188941470638 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 132.143787466812 Dec: -2.73636582188429 [deg; J2000]
{ 08h 48m 34.5s , -02d 44' 10.9" }
+/- 1.43923060630727 [arcmin] (estimated 90% radius based on SNR)
+/- 0.484867467293381 [arcmin] (formal 1-sigma fit error)
SNR: 18.0808077532643
Angular difference between Flight and Ground position is 2.336481 arcmin
Partial Coding Fraction: 0.4101562 [ including projection effects ]
Duration
T90: 83.7919999361038 +/- 8.46928009156226
Measured from: 1.11600005626678
to: 84.9079999923706 [s; relative to TRIGTIME]
T50: 29.5879999399185 +/- 1.27205659334675
Measured from: 16.3120000362396
to: 45.8999999761581 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.0640000104904175
to: 1.06400001049042 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.0399999618530273
to: 126.303999900818 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 3.417251 4.796886 3.515281 0.778328
0.092279 0.098482 0.090128 0.081218 [error]
Peak 0.182036 0.245740 0.135120 0.017881
0.014934 0.017254 0.014550 0.011403 [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 1.21e-06 2.09e-06 2.75e-06 7.39e-06 8.05e-06 1.34e-05 erg/cm2
Error 6.33e-08 6.27e-08 9.61e-08 5.84e-07 2.30e-07 6.40e-07 erg/cm2
Peak flux Power-law 2.01e+00 1.72e+00 1.01e+00 8.80e-01 5.12e+00 5.62e+00 ph/cm2/s
Error 2.54e-01 1.43e-01 1.22e-01 2.05e-01 4.27e-01 4.69e-01 ph/cm2/s
Fluence Cutoff-PL 1.13e-06 2.13e-06 2.81e-06 4.96e-06 7.87e-06 1.10e-05 erg/cm2
Error 8.10e-08 6.95e-08 1.05e-07 1.37e-06 2.64e-07 1.28e-06 erg/cm2
Peak flux Cutoff-PL 1.88e+00 1.83e+00 1.03e+00 4.73e-01 5.04e+00 5.22e+00 ph/cm2/s
Error 2.90e-01 1.87e-01 1.33e-01 3.32e-01 4.37e-01 5.52e-01 ph/cm2/s
Fluence Band 1.09e-06 2.14e-06 2.73e-06 6.97e-06 7.92e-06 1.30e-05 erg/cm2
Error 1.00e-07 -------- 9.79e-08 -------- 2.49e-07 -------- erg/cm2
Peak flux Band 1.90e+00 1.81e+00 1.04e+00 5.45e-01 5.06e+00 5.30e+00 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 1.601 0.052 - - 6.91e-03 1.87e-04 60.390 57
CPL 1.311 0.211 125.2 96.2 9.47e-03 2.15e-03 54.490 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.775 0.144 - - 3.75e-02 3.50e-03 61.800 57
CPL 1.255 0.609 65.8 -24.4 7.21e-02 6.35e-02 59.310 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: 67.648000 sec.
T50 in the 50-300 keV band: 24.576000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 126.264 0.040 126.304
T90 83.792 1.116 84.908
T50 29.588 16.312 45.900
Peak 1.000 0.064 1.064
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
132.1438 -2.7364 0.0106 32.1 44.0 1.3195 18.1 TRIG_01091101
------------------------------------------
Foreground time interval of the image:
0.040 7.501 (delta_t = 7.461 [sec])
Background time interval of the image:
-239.200 -47.996 (delta_t = 191.204 [sec])
-47.200 0.040 (delta_t = 47.240 [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
0.040000 28.240000
29.800000 126.304000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.60124 ( -0.0516349 0.0517428 )
Norm@50keV : 6.90524E-03 ( -0.000187037 0.000186955 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.39 using 59 PHA bins.
# Reduced chi-squared = 1.060 for 57 degrees of freedom
# Null hypothesis probability = 3.542829e-01
Photon flux (15-150 keV) in 124.7 sec: 0.887694 ( -0.0262181 0.0262974 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.05177e-06 ( -2.29988e-07 2.30413e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
0.040000 28.240000
29.800000 126.304000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.31078 ( -0.216085 0.205824 )
Epeak [keV] : 125.247 ( -32.0633 160.331 )
Norm@50keV : 9.47378E-03 ( -0.00185651 0.0024455 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.49 using 59 PHA bins.
# Reduced chi-squared = 0.9730 for 56 degrees of freedom
# Null hypothesis probability = 5.322738e-01
Photon flux (15-150 keV) in 124.7 sec: 0.867980 ( -0.029307 0.029414 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.87383e-06 ( -2.64227e-07 2.62917e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
0.040000 28.240000
29.800000 126.304000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.19899 ( -0.310737 6.03752 )
beta : -1.77601 ( 1.77586 0.20102 )
Epeak [keV] : 95.5297 ( -65.4599 174.601 )
Norm@50keV : 1.09961E-02 ( -0.00330192 0.010904 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.38 using 59 PHA bins.
# Reduced chi-squared = 0.9887 for 55 degrees of freedom
# Null hypothesis probability = 4.982320e-01
Photon flux (15-150 keV) in 124.7 sec: 0.865323 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 7.91622e-06 ( -7.91534e-06 -2.48714e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 15.3478 ( )
R^2/D10^2 : 8.70002E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 314.81 using 59 PHA bins.
# Reduced chi-squared = 5.5229 for 57 degrees of freedom
# Null hypothesis probability = 2.412867e-37
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.329e-07 2.862e-08
25- 50 2.162e-06 7.607e-08
50-150 3.501e-06 1.914e-07
15-150 6.195e-06 1.839e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 189.317 (-26.8578 -188.223)
Norm : 3.57174 (-0.107815 0.115794)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.116e-06 5.724e-08
25- 50 2.134e-06 1.471e-07
50-150 4.600e-06 1.035e-06
15-150 7.851e-06 1.187e-06
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.03840 (-0.756014 0.832496)
R1^2/D10^2 : 0.886831 (-0.277849 0.445124)
kT2 [keV] : 25.2739 (-2.36348 3.14664)
R2^2/D10^2 : 1.17650E-02 (-0.00416194 0.0053336)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.047e-06 1.037e-07
25- 50 2.148e-06 1.284e-07
50-150 4.573e-06 3.816e-07
15-150 7.769e-06 4.502e-07
Peak spectrum fit
Power-law model
Time interval is from 0.064 sec. to 1.064 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.77458 ( -0.141629 0.146266 )
Norm@50keV : 3.75484E-02 ( -0.00352283 0.00347416 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.80 using 59 PHA bins.
# Reduced chi-squared = 1.084 for 57 degrees of freedom
# Null hypothesis probability = 3.088241e-01
Photon flux (15-150 keV) in 1 sec: 5.12399 ( -0.426627 0.42679 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.46032e-07 ( -3.31773e-08 3.34976e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.064 sec. to 1.064 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.25488 ( -0.657269 0.560596 )
Epeak [keV] : 65.7886 ( -16.9689 -65.7886 )
Norm@50keV : 7.21074E-02 ( -0.0355273 0.0913931 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.31 using 59 PHA bins.
# Reduced chi-squared = 1.059 for 56 degrees of freedom
# Null hypothesis probability = 3.559506e-01
Photon flux (15-150 keV) in 1 sec: 5.03957 ( -0.43697 0.43654 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.32743e-07 ( -3.6406e-08 3.6606e-08 ) ergs/cm2
Band function
Time interval is from 0.064 sec. to 1.064 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.25485 ( -0.34833 0.550429 )
beta : -10.0000 ( 10 1.59872e-14 )
Epeak [keV] : 65.7754 ( -16.4953 -65.7754 )
Norm@50keV : 7.21018E-02 ( -0.0358315 0.0915225 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.31 using 59 PHA bins.
# Reduced chi-squared = 1.078 for 55 degrees of freedom
# Null hypothesis probability = 3.214486e-01
Photon flux (15-150 keV) in 1 sec: 5.06430 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.34053e-07 ( 0 0 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 11.7686 (-1.10017 1.22875)
R^2/D10^2 : 1.35246 (-0.417033 0.590329)
(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 3.955e-08 5.565e-09
25- 50 1.216e-07 1.265e-08
50-150 9.994e-08 1.906e-08
15-150 2.611e-07 2.895e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 99.9366 (-22.1926 54.4674)
Norm : 22.8311 (-2.78345 2.50164)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.967e-08 7.295e-09
25- 50 1.032e-07 1.021e-08
50-150 1.671e-07 6.045e-08
15-150 3.300e-07 6.380e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.17586 (-2.54147 2.0245)
R1^2/D10^2 : 5.70346 (-3.01859 18.7711)
kT2 [keV] : 24.0695 (-7.84954 16.8633)
R2^2/D10^2 : 6.48030E-02 (-0.0537694 0.263236)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.503e-08 1.921e-08
25- 50 1.065e-07 3.199e-08
50-150 1.722e-07 8.544e-08
15-150 3.337e-07 1.270e-07
Plot creation:
Tue Dec 28 17:08:37 EST 2021