batgrbproduct analysis for trigger=1101133
batgrbproduct Analysis for Trigger=1101133
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 Apr 5 13:13:14 EDT 2022
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1101133/GCN5_download_cron
======================================================================
Trigger: 01101133 Segment: 000
BAT Trigger Time: 670766099.328 [s; MET]
Trigger Stop: 670766103.424 [s; MET]
UTC: 2022-04-04T11:54:30.425640 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 50.4479028747465 Dec: 10.0045665363642 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.5
Image Trigger?: NO
Rate S/N Ratio: 10.5830052442584 [ if not an image trigger ]
Image S/N Ratio: 7.5
Flight Position: [ source = BAT ]
RA: 50.4479028747465 Dec: 10.0045665363642 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 50.4126564894381 Dec: 10.00094149787 [deg; J2000]
{ 03h 21m 39.0s , +10d 00' 03.4" }
+/- 2.73844700604198 [arcmin] (estimated 90% radius based on SNR)
+/- 1.06953989105112 [arcmin] (formal 1-sigma fit error)
SNR: 7.21293765899985
Angular difference between Flight and Ground position is 2.093964 arcmin
Partial Coding Fraction: 0.4726562 [ including projection effects ]
Duration
T90: 2.53599989414215 +/- 0.659320804842708
Measured from: 0.344000220298767
to: 2.88000011444092 [s; relative to TRIGTIME]
T50: 1.03199994564056 +/- 0.794362651802814
Measured from: 1.09200012683868
to: 2.12400007247925 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 1.14800000190735
to: 2.14800000190735 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.25600004196167
to: 2.98000001907349 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.088661 0.096469 0.049850 0.005677
0.015776 0.016217 0.014377 0.013500 [error]
Peak 0.042989 0.049048 0.033050 0.004069
0.009668 0.010271 0.008805 0.008322 [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 2.77e-08 4.00e-08 4.29e-08 8.57e-08 1.37e-07 1.96e-07 erg/cm2
Error 7.55e-09 7.79e-09 1.39e-08 5.56e-08 3.24e-08 7.06e-08 erg/cm2
Peak flux Power-law 4.13e-01 3.57e-01 2.11e-01 1.86e-01 1.06e+00 1.17e+00 ph/cm2/s
Error 1.41e-01 8.50e-02 7.15e-02 1.21e-01 2.53e-01 2.82e-01 ph/cm2/s
Fluence Cutoff-PL 2.64e-08 4.38e-08 4.08e-08 2.43e-08 1.26e-07 1.35e-07 erg/cm2
Error 8.39e-09 1.16e-08 1.78e-08 7.17e-08 3.76e-08 8.63e-08 erg/cm2
Peak flux Cutoff-PL 3.82e-01 4.18e-01 2.01e-01 3.90e-02 1.03e+00 1.04e+00 ph/cm2/s
Error 1.50e-01 1.28e-01 1.14e-01 1.02e-01 2.54e-01 2.81e-01 ph/cm2/s
Fluence Band 2.56e-08 4.52e-08 3.91e-08 4.55e-08 1.28e-07 1.56e-07 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 1.898 0.358 - - 5.47e-03 1.31e-03 59.250 57
CPL 1.168 1.765 46.1 0.0 1.48e-02 0.00e+00 58.700 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.760 0.394 - - 7.82e-03 2.10e-03 56.010 57
CPL 0.538 2.753 47.9 0.0 4.21e-02 0.00e+00 54.400 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 2.724 0.256 2.980
T90 2.536 0.344 2.880
T50 1.032 1.092 2.124
Peak 1.000 1.148 2.148
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
50.4127 +10.0009 0.0267 36.0 -44.8 0.2267 7.2 TRIG_01101133
------------------------------------------
Foreground time interval of the image:
0.256 2.980 (delta_t = 2.724 [sec])
Background time interval of the image:
-79.227 -77.738 (delta_t = 1.489 [sec])
-76.328 -73.218 (delta_t = 3.110 [sec])
-71.328 -56.678 (delta_t = 14.650 [sec])
-56.328 -36.658 (delta_t = 19.670 [sec])
-35.328 -14.988 (delta_t = 20.340 [sec])
-14.328 0.256 (delta_t = 14.584 [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 0.256 sec. to 2.980 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.89783 ( -0.342629 0.372596 )
Norm@50keV : 5.47451E-03 ( -0.00133212 0.00128278 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.25 using 59 PHA bins.
# Reduced chi-squared = 1.039 for 57 degrees of freedom
# Null hypothesis probability = 3.934650e-01
Photon flux (15-150 keV) in 2.724 sec: 0.784929 ( -0.15241 0.152438 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.37098e-07 ( -3.17553e-08 3.2983e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.256 sec. to 2.980 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.16833 ( -2.5373 0.992393 )
Epeak [keV] : 46.0937 ( )
Norm@50keV : 1.48011E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.70 using 59 PHA bins.
# Reduced chi-squared = 1.048 for 56 degrees of freedom
# Null hypothesis probability = 3.766347e-01
Photon flux (15-150 keV) in 2.724 sec: 0.765933 ( -0.159144 0.158773 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.26133e-07 ( -3.53878e-08 3.9905e-08 ) ergs/cm2
Band function
Time interval is from 0.256 sec. to 2.980 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.01750 ( 0.826496 5.11821 )
beta : -2.35082 ( 2.40814 0.783021 )
Epeak [keV] : 42.7035 ( -40.5128 653.187 )
Norm@50keV : 1.87421E-02 ( -0.0184877 678.156 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.31 using 59 PHA bins.
# Reduced chi-squared = 1.060 for 55 degrees of freedom
# Null hypothesis probability = 3.546630e-01
Photon flux (15-150 keV) in 2.724 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.27921e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.0509 (-1.9429 2.43305)
R^2/D10^2 : 0.369635 (-0.208885 0.465052)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.75 using 59 PHA bins.
# Reduced chi-squared = 1.083 for 57 degrees of freedom
# Null hypothesis probability = 3.101130e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.075e-08 7.344e-09
25- 50 5.196e-08 1.713e-08
50-150 2.752e-08 1.460e-08
15-150 1.002e-07 3.143e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 74.5952 (-33.7927 105.073)
Norm : 3.79744 (-0.963511 1.42026)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.670e-08 8.137e-09
25- 50 4.320e-08 1.599e-08
50-150 5.811e-08 4.085e-08
15-150 1.280e-07 5.483e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.57311 (-6.84658 2.87919)
R1^2/D10^2 : 0.608187 (-0.3651 520.795)
kT2 [keV] : 63.1889 (-69.2502 -71.0088)
R2^2/D10^2 : 4.39847E-04 (-0.000322566 0.350151)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.350e-08 1.359e-08
25- 50 4.865e-08 2.617e-08
50-150 6.389e-08 3.242e-08
15-150 1.360e-07 6.064e-08
Peak spectrum fit
Power-law model
Time interval is from 1.148 sec. to 2.148 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.76038 ( -0.382616 0.404767 )
Norm@50keV : 7.81875E-03 ( -0.00212622 0.00207156 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.01 using 59 PHA bins.
# Reduced chi-squared = 0.9826 for 57 degrees of freedom
# Null hypothesis probability = 5.122738e-01
Photon flux (15-150 keV) in 1 sec: 1.06129 ( -0.252552 0.252682 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.21113e-08 ( -1.95895e-08 2.03437e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.148 sec. to 2.148 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.538174 ( -3.94151 1.5641 )
Epeak [keV] : 47.8944 ( )
Norm@50keV : 4.21498E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.40 using 59 PHA bins.
# Reduced chi-squared = 0.9715 for 56 degrees of freedom
# Null hypothesis probability = 5.355253e-01
Photon flux (15-150 keV) in 1 sec: 1.03245 ( -0.252575 0.25462 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.32552e-08 ( -2.16872e-08 2.3488e-08 ) ergs/cm2
Band function
Time interval is from 1.148 sec. to 2.148 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.98172 ( -5.30177 -4.98172 )
beta : -2.34136 ( -1.28237 0.613649 )
Epeak [keV] : 28.3475 ( -7.1094 6.70745 )
Norm@50keV : 547.257 ( -123.548 2792.43 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.97 using 59 PHA bins.
# Reduced chi-squared = 0.9268 for 55 degrees of freedom
# Null hypothesis probability = 6.292410e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 6.68616e-08 ( 0 0 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.77627 (-2.26249 3.36514)
R^2/D10^2 : 0.575012 (-0.388489 0.98592)
(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 1.110e-08 5.359e-09
25- 50 2.672e-08 1.344e-08
50-150 1.306e-08 8.063e-09
15-150 5.089e-08 2.142e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 92.3829 (-48.0393 -92.3829)
Norm : 4.87643 (-1.34454 1.99284)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.273e-08 6.288e-09
25- 50 2.166e-08 1.256e-08
50-150 3.351e-08 2.704e-08
15-150 6.790e-08 4.298e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.37261 (-2.44971 3.0964)
R1^2/D10^2 : 1.31758 (-0.659233 3.48588)
kT2 [keV] : 27.4977 (-27.4758 -27.4761)
R2^2/D10^2 : 7.32766E-03 (-0.00727531 0.178852)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.302e-08 7.920e-09
25- 50 2.371e-08 1.361e-08
50-150 3.346e-08 2.066e-08
15-150 7.019e-08 3.473e-08
Plot creation:
Tue Apr 5 13:23:38 EDT 2022