batgrbproduct analysis for trigger=1101053
batgrbproduct Analysis for Trigger=1101053
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): Mon Apr 4 15:48:58 EDT 2022
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1101053/GCN5_download_cron
======================================================================
Trigger: 01101053 Segment: 000
BAT Trigger Time: 670711391.552 [s; MET]
Trigger Stop: 670711392.576 [s; MET]
UTC: 2022-04-03T20:42:42.653340 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 191.025474789219 Dec: 89.1703529424159 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 12.67
Image Trigger?: NO
Rate S/N Ratio: 18.6815416922694 [ if not an image trigger ]
Image S/N Ratio: 12.67
Flight Position: [ source = BAT ]
RA: 191.025474789219 Dec: 89.1703529424159 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 190.974440344907 Dec: 89.1802741998334 [deg; J2000]
{ 12h 43m 53.9s , +89d 10' 49.0" }
+/- 0.754973076799067 [arcmin] (estimated 90% radius based on SNR)
+/- 0.197666312286198 [arcmin] (formal 1-sigma fit error)
SNR: 45.4466632375914
Angular difference between Flight and Ground position is 0.596905 arcmin
Partial Coding Fraction: 0.6015625 [ including projection effects ]
Duration
T90: 26.9919999837875 +/- 3.41316034398062
Measured from: -8.77999997138977
to: 18.2120000123978 [s; relative to TRIGTIME]
T50: 11.9399999380112 +/- 0.636402371784686
Measured from: -1.45999991893768
to: 10.4800000190735 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 1.06400001049042
to: 2.06400001049042 [s; relative to TRIGTIME]
Total Fluence
Measured from: -14.4200000762939
to: 27.9559999704361 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 2.090640 2.583115 1.381411 0.279868
0.058578 0.061098 0.052972 0.045792 [error]
Peak 0.098484 0.118572 0.075607 0.036211
0.010019 0.010235 0.008949 0.007183 [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 7.77e-07 1.10e-06 1.15e-06 2.21e-06 3.71e-06 5.22e-06 erg/cm2
Error 4.49e-08 3.70e-08 5.55e-08 2.30e-07 1.29e-07 2.72e-07 erg/cm2
Peak flux Power-law 9.87e-01 9.02e-01 5.69e-01 5.50e-01 2.69e+00 3.01e+00 ph/cm2/s
Error 1.57e-01 8.99e-02 7.43e-02 1.44e-01 2.64e-01 2.90e-01 ph/cm2/s
Fluence Cutoff-PL 7.39e-07 1.12e-06 1.15e-06 1.41e-06 3.61e-06 4.42e-06 erg/cm2
Error 5.51e-08 4.41e-08 5.80e-08 5.55e-07 1.55e-07 4.69e-07 erg/cm2
Peak flux Cutoff-PL 9.87e-01 9.02e-01 5.69e-01 5.46e-01 2.69e+00 3.00e+00 ph/cm2/s
Error 1.43e-01 9.49e-02 7.48e-02 -------- 2.63e-01 2.56e-01 ph/cm2/s
Fluence Band 6.88e-07 1.15e-06 1.12e-06 1.90e-06 3.59e-06 4.86e-06 erg/cm2
Error 6.48e-08 4.91e-08 5.90e-08 3.02e-07 1.44e-07 3.44e-07 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 1.936 0.065 - - 9.52e-03 3.35e-04 60.620 57
CPL 1.644 0.266 58.2 39.8 1.35e-02 4.27e-03 56.850 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.664 0.170 - - 2.05e-02 2.09e-03 58.470 57
CPL 1.667 0.172 9999.4 -0.0 2.04e-02 1.51e-02 58.480 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: 21.312000 sec.
T50 in the 50-300 keV band: 11.456000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 42.376 -14.420 27.956
T90 26.992 -8.780 18.212
T50 11.940 -1.460 10.480
Peak 1.000 1.064 2.064
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
190.9744 +89.1803 0.0042 34.3 -145.0 5.0472 45.4 TRIG_01101053
------------------------------------------
Foreground time interval of the image:
-14.420 11.649 (delta_t = 26.069 [sec])
Background time interval of the image:
-239.552 -218.132 (delta_t = 21.420 [sec])
-216.552 -170.042 (delta_t = 46.510 [sec])
-168.552 -135.012 (delta_t = 33.540 [sec])
-133.552 -14.420 (delta_t = 119.132 [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 -14.420 sec. to 27.956 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.93551 ( -0.0642097 0.0648092 )
Norm@50keV : 9.52162E-03 ( -0.000336132 0.000334721 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.62 using 59 PHA bins.
# Reduced chi-squared = 1.063 for 57 degrees of freedom
# Null hypothesis probability = 3.467692e-01
Photon flux (15-150 keV) in 42.38 sec: 1.38752 ( -0.0496036 0.0497862 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.71205e-06 ( -1.28505e-07 1.2883e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -14.420 sec. to 27.956 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.64357 ( -0.274825 0.257426 )
Epeak [keV] : 58.1671 ( -11.3771 68.2801 )
Norm@50keV : 1.34606E-02 ( -0.00346186 0.00508332 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.85 using 59 PHA bins.
# Reduced chi-squared = 1.015 for 56 degrees of freedom
# Null hypothesis probability = 4.431945e-01
Photon flux (15-150 keV) in 42.38 sec: 1.35765 ( -0.05553 0.05572 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.61376e-06 ( -1.55242e-07 1.54801e-07 ) ergs/cm2
Band function
Time interval is from -14.420 sec. to 27.956 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.882849 ( -0.936732 2.68165 )
beta : -2.07022 ( -0.155521 0.108972 )
Epeak [keV] : 37.4854 ( -8.85533 14.5716 )
Norm@50keV : 4.16754E-02 ( -0.0666689 4.33133 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.17 using 59 PHA bins.
# Reduced chi-squared = 0.9485 for 55 degrees of freedom
# Null hypothesis probability = 5.835307e-01
Photon flux (15-150 keV) in 42.38 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.59492e-06 ( -3.59462e-06 -1.43668e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 11.7863 ( )
R^2/D10^2 : 0.327238 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 247.45 using 59 PHA bins.
# Reduced chi-squared = 4.3412 for 57 degrees of freedom
# Null hypothesis probability = 1.441630e-25
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.068e-07 2.659e-08
25- 50 1.253e-06 4.980e-08
50-150 1.034e-06 7.967e-08
15-150 2.694e-06 1.026e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 84.2262 (-9.31569 11.2552)
Norm : 6.23811 (-0.349533 0.376596)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.880e-07 3.645e-08
25- 50 1.146e-06 3.941e-08
50-150 1.674e-06 1.225e-07
15-150 3.509e-06 1.473e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.04989 (-0.691735 0.712152)
R1^2/D10^2 : 1.71535 (-0.484185 0.758658)
kT2 [keV] : 24.7283 (-3.37068 4.83692)
R2^2/D10^2 : 1.38829E-02 (-0.00670794 0.0108512)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.476e-07 6.103e-08
25- 50 1.166e-06 8.646e-08
50-150 1.748e-06 2.674e-07
15-150 3.562e-06 3.445e-07
Peak spectrum fit
Power-law model
Time interval is from 1.064 sec. to 2.064 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.66447 ( -0.168489 0.171072 )
Norm@50keV : 2.04857E-02 ( -0.00209974 0.00207683 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.47 using 59 PHA bins.
# Reduced chi-squared = 1.026 for 57 degrees of freedom
# Null hypothesis probability = 4.211439e-01
Photon flux (15-150 keV) in 1 sec: 2.68782 ( -0.263504 0.26389 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.90257e-07 ( -2.05233e-08 2.06926e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.064 sec. to 2.064 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.66656 ( -0.175088 0.169873 )
Epeak [keV] : 9999.35 ( -9999.35 -9999.36 )
Norm@50keV : 2.04351E-02 ( -0.01086 0.0194177 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.48 using 59 PHA bins.
# Reduced chi-squared = 1.044 for 56 degrees of freedom
# Null hypothesis probability = 3.844871e-01
Photon flux (15-150 keV) in 1 sec: 2.68700 ( -0.26141 0.26369 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.90143e-07 ( -2.1132e-08 2.0627e-08 ) ergs/cm2
Band function
Time interval is from 1.064 sec. to 2.064 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.94469 ( -4.94469 -4.94469 )
beta : -1.75819 ( -0.233731 0.193363 )
Epeak [keV] : 23.3448 ( -23.3448 4.38542 )
Norm@50keV : 3538.61 ( -337.42 1.2962e+07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.57 using 59 PHA bins.
# Reduced chi-squared = 1.029 for 55 degrees of freedom
# Null hypothesis probability = 4.161776e-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] : 12.1339 (-1.45846 1.72721)
R^2/D10^2 : 0.620511 (-0.240456 0.376731)
(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 1.934e-08 3.450e-09
25- 50 6.166e-08 8.180e-09
50-150 5.499e-08 1.194e-08
15-150 1.360e-07 1.770e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 157.206 (-60.2776 -155.939)
Norm : 10.9738 (-1.16701 1.56646)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.807e-08 4.385e-09
25- 50 5.237e-08 1.595e-08
50-150 1.054e-07 5.582e-08
15-150 1.858e-07 6.668e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.49147 (-1.77557 1.69585)
R1^2/D10^2 : 1.92165 (-0.921729 2.20921)
kT2 [keV] : 55.1044 (-27.0101 -55.3619)
R2^2/D10^2 : 3.09488E-03 (-0.00281475 0.0186383)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.705e-08 6.715e-09
25- 50 5.754e-08 1.316e-08
50-150 1.099e-07 5.566e-08
15-150 1.944e-07 6.758e-08
Plot creation:
Mon Apr 4 15:57:57 EDT 2022