batgrbproduct analysis for trigger=1070157
batgrbproduct Analysis for Trigger=1070157
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): Wed Aug 25 07:26:26 EDT 2021
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1070157/GCN5_download_cron
======================================================================
Trigger: 01070157 Segment: 000
BAT Trigger Time: 651471029.248 [s; MET]
Trigger Stop: 651471033.344 [s; MET]
UTC: 2021-08-24T04:10:01.645200 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 232.132177220809 Dec: 11.1352220237674 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 11.96
Image Trigger?: NO
Rate S/N Ratio: 14.0356688476182 [ if not an image trigger ]
Image S/N Ratio: 11.96
Flight Position: [ source = BAT ]
RA: 232.132177220809 Dec: 11.1352220237674 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 232.114686007172 Dec: 11.1694250368828 [deg; J2000]
{ 15h 28m 27.5s , +11d 10' 09.9" }
+/- 1.22303636704894 [arcmin] (estimated 90% radius based on SNR)
+/- 0.483874851309748 [arcmin] (formal 1-sigma fit error)
SNR: 22.8141867825562
Angular difference between Flight and Ground position is 2.296004 arcmin
Partial Coding Fraction: 0.6015625 [ including projection effects ]
Duration
T90: 90 +/- 17.0880074906351
Measured from: -8.24799990653992
to: 81.7520000934601 [s; relative to TRIGTIME]
T50: 26 +/- 9.21954445729289
Measured from: 2.75200009346008
to: 28.7520000934601 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.751999974250793
to: 1.75199997425079 [s; relative to TRIGTIME]
Total Fluence
Measured from: -13.2480000257492
to: 96.7519999742508 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.850197 1.215156 0.851344 0.280406
0.088273 0.091323 0.081200 0.070682 [error]
Peak 0.043902 0.048568 0.048857 0.021267
0.008337 0.009463 0.008358 0.007581 [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 2.47e-07 4.73e-07 6.99e-07 2.22e-06 1.97e-06 3.64e-06 erg/cm2
Error 3.53e-08 4.20e-08 7.78e-08 5.23e-07 1.91e-07 5.85e-07 erg/cm2
Peak flux Power-law 3.42e-01 3.92e-01 3.22e-01 4.43e-01 1.22e+00 1.50e+00 ph/cm2/s
Error 1.14e-01 7.64e-02 7.07e-02 2.16e-01 2.13e-01 2.80e-01 ph/cm2/s
Fluence Cutoff-PL 2.28e-07 5.09e-07 7.14e-07 8.60e-07 1.86e-06 2.31e-06 erg/cm2
Error 4.05e-08 5.57e-08 8.59e-08 8.88e-07 2.23e-07 9.04e-07 erg/cm2
Peak flux Cutoff-PL 3.52e-01 3.95e-01 3.17e-01 4.22e-01 1.22e+00 1.49e+00 ph/cm2/s
Error 1.14e-01 7.69e-02 -------- 2.47e-01 2.13e-01 3.03e-01 ph/cm2/s
Fluence Band 2.30e-07 5.18e-07 6.77e-07 1.78e-06 1.92e-06 3.22e-06 erg/cm2
Error -------- 6.07e-08 8.01e-08 -------- 1.98e-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 1.436 0.144 - - 1.87e-03 1.62e-04 48.150 57
CPL 0.816 0.661 90.3 396.7 3.99e-03 3.74e-03 45.090 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.284 0.334 - - 1.02e-02 1.78e-03 54.690 57
CPL 1.297 0.337 9999.4 0.0 1.02e-02 5.84e-03 54.710 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: 28.352000 sec.
T50 in the 50-300 keV band: 14.144000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 110.000 -13.248 96.752
T90 90.000 -8.248 81.752
T50 26.000 2.752 28.752
Peak 1.000 0.752 1.752
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
232.1147 +11.1694 0.0085 22.5 81.2 2.7521 22.8 TRIG_01070157
------------------------------------------
Foreground time interval of the image:
-13.248 32.053 (delta_t = 45.301 [sec])
Background time interval of the image:
-239.248 -13.248 (delta_t = 226.000 [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 -13.248 sec. to 96.752 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.43646 ( -0.144056 0.144122 )
Norm@50keV : 1.87016E-03 ( -0.000162799 0.000162198 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.15 using 59 PHA bins.
# Reduced chi-squared = 0.8447 for 57 degrees of freedom
# Null hypothesis probability = 7.919281e-01
Photon flux (15-150 keV) in 110 sec: 0.229708 ( -0.0197466 0.0197637 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.97356e-06 ( -1.8985e-07 1.91721e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -13.248 sec. to 96.752 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.816038 ( -0.717002 0.604406 )
Epeak [keV] : 90.2781 ( -26.6771 766.672 )
Norm@50keV : 3.98595E-03 ( -0.00204425 0.00544119 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.09 using 59 PHA bins.
# Reduced chi-squared = 0.8051 for 56 degrees of freedom
# Null hypothesis probability = 8.515438e-01
Photon flux (15-150 keV) in 110 sec: 0.224013 ( -0.020658 0.020567 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.85904e-06 ( -2.222e-07 2.22937e-07 ) ergs/cm2
Band function
Time interval is from -13.248 sec. to 96.752 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99293 ( -5.69196 -4.99293 )
beta : -1.61057 ( -0.237975 0.179415 )
Epeak [keV] : 27.3973 ( -5.18223 4.55295 )
Norm@50keV : 110.882 ( -9.29623 293.071 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.87 using 59 PHA bins.
# Reduced chi-squared = 0.7432 for 55 degrees of freedom
# Null hypothesis probability = 9.219295e-01
Photon flux (15-150 keV) in 110 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.9186e-06 ( -1.91783e-06 -1.96449e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 14.2208 (-1.42 1.62432)
R^2/D10^2 : 3.20070E-02 (-0.0101726 0.0144501)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.66 using 59 PHA bins.
# Reduced chi-squared = 1.134 for 57 degrees of freedom
# Null hypothesis probability = 2.268255e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.502e-07 2.574e-08
25- 50 5.672e-07 6.281e-08
50-150 7.612e-07 1.431e-07
15-150 1.479e-06 1.644e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-48.4804 -200)
Norm : 0.943129 (-0.0799962 0.0799962)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.592e-07 2.772e-08
25- 50 4.986e-07 9.124e-08
50-150 1.094e-06 5.307e-07
15-150 1.851e-06 4.948e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 10.0279 (-2.96816 3.03008)
R1^2/D10^2 : 8.57722E-02 (-0.0399308 0.132999)
kT2 [keV] : 49.3834 (-27.2025 -49.8175)
R2^2/D10^2 : 3.56713E-04 (-0.000327811 0.00438893)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.040e-07 5.181e-08
25- 50 5.588e-07 1.568e-07
50-150 1.172e-06 5.793e-07
15-150 1.934e-06 7.277e-07
Peak spectrum fit
Power-law model
Time interval is from 0.752 sec. to 1.752 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.28384 ( -0.335115 0.332864 )
Norm@50keV : 1.02240E-02 ( -0.00178634 0.00177523 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.69 using 59 PHA bins.
# Reduced chi-squared = 0.9594 for 57 degrees of freedom
# Null hypothesis probability = 5.623110e-01
Photon flux (15-150 keV) in 1 sec: 1.21619 ( -0.212355 0.212749 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.01434e-07 ( -2.04356e-08 2.07779e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.752 sec. to 1.752 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.29681 ( -0.353306 0.320237 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 1.01938E-02 ( -0.00178508 0.0098996 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.71 using 59 PHA bins.
# Reduced chi-squared = 0.9770 for 56 degrees of freedom
# Null hypothesis probability = 5.237725e-01
Photon flux (15-150 keV) in 1 sec: 1.21902 1.21576 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.00889e-07 ( -1.98988e-08 2.0646e-08 ) ergs/cm2
Band function
Time interval is from 0.752 sec. to 1.752 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.996721 ( 0.996655 0.996655 )
beta : -1.28424 ( 1.28411 0.335789 )
Epeak [keV] : 57.4525 ( -57.4681 -57.4681 )
Norm@50keV : 1.87593E-02 ( -0.0090426 1.61244 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.69 using 59 PHA bins.
# Reduced chi-squared = 0.9943 for 55 degrees of freedom
# Null hypothesis probability = 4.865263e-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] : 18.9934 (-5.09411 7.91675)
R^2/D10^2 : 6.20632E-02 (-0.0407748 0.111481)
(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 4.401e-09 1.628e-09
25- 50 2.117e-08 7.207e-09
50-150 5.611e-08 2.059e-08
15-150 8.167e-08 2.791e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-72.3672 -200)
Norm : 4.95808 (-0.866698 0.866698)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.235e-08 7.235e-09
25- 50 2.375e-08 1.350e-08
50-150 5.209e-08 2.976e-08
15-150 8.818e-08 4.971e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.76989 (-1.77547 4.00759)
R1^2/D10^2 : 5.65963 (-5.04039 46.5986)
kT2 [keV] : 31.9970 (-10.5444 34.2086)
R2^2/D10^2 : 1.10871E-02 (-0.00945523 0.0269423)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.306e-08 7.247e-09
25- 50 1.738e-08 8.297e-09
50-150 7.610e-08 4.518e-08
15-150 1.065e-07 5.291e-08
Plot creation:
Wed Aug 25 07:35:59 EDT 2021