batgrbproduct analysis for trigger=929744
batgrbproduct Analysis for Trigger=929744
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 v2.46
Process Start Time (local time): Thu Oct 17 03:08:21 EDT 2019
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger929744/GCN5_download_cron
======================================================================
Trigger: 00929744 Segment: 000
BAT Trigger Time: 592891764.672 [s; MET]
Trigger Stop: 592891781.056 [s; MET]
UTC: 2019-10-16T04:09:00.915720 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 30.2956005884388 Dec: 24.5009472918732 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 17.91
Image Trigger?: NO
Rate S/N Ratio: 19.3907194296653 [ if not an image trigger ]
Image S/N Ratio: 17.91
Flight Position: [ source = BAT ]
RA: 30.2956005884388 Dec: 24.5009472918732 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 30.2684972350246 Dec: 24.508442569882 [deg; J2000]
{ 02h 01m 04.4s , +24d 30' 30.4" }
+/- 1.50613614766521 [arcmin] (estimated 90% radius based on SNR)
+/- 0.54102551963338 [arcmin] (formal 1-sigma fit error)
SNR: 16.944416586502
Angular difference between Flight and Ground position is 1.546554 arcmin
Partial Coding Fraction: 0.6484375 [ including projection effects ]
Duration
T90: 219.703999996185 +/- 183.354348442034
Measured from: -28.3279999494553
to: 191.37600004673 [s; relative to TRIGTIME]
T50: 61.0119999647141 +/- 11.7685369937939
Measured from: -7.98399996757507
to: 53.027999997139 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -7.75200009346008
to: -6.75200009346008 [s; relative to TRIGTIME]
Total Fluence
Measured from: -42.8200000524521
to: 422.611999988556 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 3.017618 3.752672 2.801995 0.972569
0.162411 0.168795 0.149111 0.133987 [error]
Peak 0.052265 0.067437 0.045535 0.015761
0.008437 0.008694 0.007999 0.006942 [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 9.18e-07 1.64e-06 2.26e-06 6.43e-06 6.51e-06 1.13e-05 erg/cm2
Error 8.41e-08 8.79e-08 1.53e-07 9.69e-07 3.64e-07 1.07e-06 erg/cm2
Peak flux Power-law 5.35e-01 4.95e-01 3.17e-01 3.12e-01 1.48e+00 1.66e+00 ph/cm2/s
Error 1.21e-01 7.27e-02 6.70e-02 1.30e-01 2.15e-01 2.49e-01 ph/cm2/s
Fluence Cutoff-PL 9.18e-07 1.65e-06 2.26e-06 6.37e-06 6.51e-06 1.12e-05 erg/cm2
Error 7.34e-08 8.59e-08 1.49e-07 1.70e-06 3.81e-07 1.86e-06 erg/cm2
Peak flux Cutoff-PL 5.02e-01 5.23e-01 3.23e-01 1.69e-01 1.45e+00 1.52e+00 ph/cm2/s
Error 1.42e-01 9.59e-02 7.30e-02 1.89e-01 2.24e-01 3.14e-01 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 1.542 0.095 - - 1.48e-03 7.59e-05 55.810 57
CPL 1.541 0.095 9999.4 0.0 1.49e-03 3.85e-04 55.810 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.643 0.260 - - 1.13e-02 1.84e-03 56.830 57
CPL 1.157 1.038 79.4 -23.6 2.08e-02 5.63e-02 56.230 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: 122.688000 sec.
T50 in the 50-300 keV band: 43.456000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 465.432 -42.820 422.612
T90 219.704 -28.328 191.376
T50 61.012 -7.984 53.028
Peak 1.000 -7.752 -6.752
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
30.2685 +24.5084 0.0113 26.8 52.3 10.3824 16.9 TRIG_00929744
------------------------------------------
Foreground time interval of the image:
-42.820 422.612 (delta_t = 465.432 [sec])
Background time interval of the image:
-239.672 -214.412 (delta_t = 25.260 [sec])
-213.672 -42.820 (delta_t = 170.852 [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 -42.820 sec. to 422.612 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.54189 ( -0.094346 0.0947972 )
Norm@50keV : 1.48475E-03 ( -7.60506e-05 7.58412e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.81 using 59 PHA bins.
# Reduced chi-squared = 0.9791 for 57 degrees of freedom
# Null hypothesis probability = 5.197581e-01
Photon flux (15-150 keV) in 465.4 sec: 0.187522 ( -0.00976753 0.0097954 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.51281e-06 ( -3.63147e-07 3.65098e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -42.820 sec. to 422.612 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.54100 ( -0.0956081 0.0944336 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 1.48816E-03 ( -7.47585e-05 0.000696177 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.81 using 59 PHA bins.
# Reduced chi-squared = 0.9967 for 56 degrees of freedom
# Null hypothesis probability = 4.819017e-01
Photon flux (15-150 keV) in 465.4 sec: 0.187460 ( -0.009769 0.009702 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.51225e-06 ( -4.00151e-07 3.62035e-07 ) ergs/cm2
Band function
Time interval is from -42.820 sec. to 422.612 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.23074 ( 1.23074 1.23074 )
beta : -1.54665 ( 1.54666 0.0988536 )
Epeak [keV] : 59.9898 ( -59.9933 -59.9933 )
Norm@50keV : 2.54912E-03 ( -0.000922026 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.80 using 59 PHA bins.
# Reduced chi-squared = 1.015 for 55 degrees of freedom
# Null hypothesis probability = 4.446174e-01
Photon flux (15-150 keV) in 465.4 sec: 0.191105 ( 6.80889 -0.191105 ) 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] : 14.8567 ( )
R^2/D10^2 : 2.09909E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 158.14 using 59 PHA bins.
# Reduced chi-squared = 2.7745 for 57 degrees of freedom
# Null hypothesis probability = 1.895438e-11
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.521e-07 4.244e-08
25- 50 1.781e-06 1.229e-07
50-150 2.663e-06 2.790e-07
15-150 4.896e-06 2.944e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-37.4625 -200)
Norm : 0.759016 (-0.0379098 0.0379098)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.17 using 59 PHA bins.
# Reduced chi-squared = 1.021 for 57 degrees of freedom
# Null hypothesis probability = 4.319058e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.812e-07 4.701e-08
25- 50 1.695e-06 1.012e-07
50-150 3.718e-06 2.180e-07
15-150 6.294e-06 3.723e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.02009 (-1.37915 1.53895)
R1^2/D10^2 : 0.200650 (-0.0940434 0.234982)
kT2 [keV] : 28.3465 (-5.43581 9.83492)
R2^2/D10^2 : 1.78815E-03 (-0.00109304 0.00201617)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.70 using 59 PHA bins.
# Reduced chi-squared = 1.140 for 55 degrees of freedom
# Null hypothesis probability = 2.221085e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.498e-07 1.540e-07
25- 50 1.673e-06 2.299e-07
50-150 3.945e-06 8.887e-07
15-150 6.468e-06 1.213e-06
Peak spectrum fit
Power-law model
Time interval is from -7.752 sec. to -6.752 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.64350 ( -0.25375 0.265384 )
Norm@50keV : 1.13287E-02 ( -0.001859 0.00181612 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.83 using 59 PHA bins.
# Reduced chi-squared = 0.9970 for 57 degrees of freedom
# Null hypothesis probability = 4.815465e-01
Photon flux (15-150 keV) in 1 sec: 1.47610 ( -0.214675 0.214734 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.05432e-07 ( -1.82417e-08 1.86665e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -7.752 sec. to -6.752 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.15659 ( -1.35765 0.718099 )
Epeak [keV] : 79.3919 ( -32.1106 -79.395 )
Norm@50keV : 2.08411E-02 ( -0.02084 0.0918172 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.23 using 59 PHA bins.
# Reduced chi-squared = 1.004 for 56 degrees of freedom
# Null hypothesis probability = 4.662502e-01
Photon flux (15-150 keV) in 1 sec: 1.44872 ( -0.22438 0.22289 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.00731e-07 ( -2.06511e-08 2.1195e-08 ) ergs/cm2
Band function
Time interval is from -7.752 sec. to -6.752 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.04269 ( 1.04255 5.56717 )
beta : -2.08265 ( 2.0897 0.663601 )
Epeak [keV] : 70.1594 ( -69.6752 -69.6752 )
Norm@50keV : 2.44023E-02 ( -0.0142584 1.83221e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.11 using 59 PHA bins.
# Reduced chi-squared = 1.020 for 55 degrees of freedom
# Null hypothesis probability = 4.330396e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 9.90524e-08 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 12.7569 (-2.03448 2.45416)
R^2/D10^2 : 0.294497 (-0.138648 0.254429)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.00 using 59 PHA bins.
# Reduced chi-squared = 1.123 for 57 degrees of freedom
# Null hypothesis probability = 2.443262e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.017e-08 2.780e-09
25- 50 3.430e-08 7.235e-09
50-150 3.489e-08 1.151e-08
15-150 7.935e-08 1.654e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 151.309 (-72.4242 -149.269)
Norm : 6.10948 (-0.943829 1.27453)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.28 using 59 PHA bins.
# Reduced chi-squared = 0.9873 for 57 degrees of freedom
# Null hypothesis probability = 5.021484e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.568e-08 8.790e-09
25- 50 2.910e-08 1.588e-08
50-150 5.765e-08 3.425e-08
15-150 1.024e-07 5.745e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.19916 (-2.95693 -4.18962)
R1^2/D10^2 : 8.79658 (-8.46095 47.2683)
kT2 [keV] : 16.4561 (-3.96786 -16.4307)
R2^2/D10^2 : 0.102644 (-0.10325 0.210234)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.93 using 59 PHA bins.
# Reduced chi-squared = 1.035 for 55 degrees of freedom
# Null hypothesis probability = 4.031464e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.578e-08 8.402e-09
25- 50 2.877e-08 1.541e-08
50-150 4.712e-08 2.847e-08
15-150 9.167e-08 4.232e-08
Plot creation:
Thu Oct 17 03:12:02 EDT 2019