batgrbproduct analysis for trigger=932435
batgrbproduct Analysis for Trigger=932435
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): Fri Nov 1 16:26:54 EDT 2019
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger932435/GCN5_download_cron
======================================================================
Trigger: 00932435 Segment: 000
BAT Trigger Time: 594175017.536 [s; MET]
Trigger Stop: 594175019.584 [s; MET]
UTC: 2019-10-31T00:36:33.697220 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 233.470112879956 Dec: 6.14378241270486 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.26
Image Trigger?: NO
Rate S/N Ratio: 12.4899959967968 [ if not an image trigger ]
Image S/N Ratio: 7.26
Flight Position: [ source = BAT ]
RA: 233.470112879956 Dec: 6.14378241270486 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 233.4902173638 Dec: 6.10914688472544 [deg; J2000]
{ 15h 33m 57.7s , +06d 06' 32.9" }
+/- 1.97050946273839 [arcmin] (estimated 90% radius based on SNR)
+/- 0.746354466265067 [arcmin] (formal 1-sigma fit error)
SNR: 11.5422882532885
Angular difference between Flight and Ground position is 2.399405 arcmin
Partial Coding Fraction: 0.4648438 [ including projection effects ]
Duration
T90: 19.1360000371933 +/- 6.26234457124176
Measured from: -6.63199985027313
to: 12.5040001869202 [s; relative to TRIGTIME]
T50: 7.08800005912781 +/- 2.00511338869853
Measured from: -0.551999926567078
to: 6.53600013256073 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 3.48399996757507
to: 4.48399996757507 [s; relative to TRIGTIME]
Total Fluence
Measured from: -11.0800000429153
to: 16.8719999790192 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.330631 0.541272 0.397535 0.156628
0.049642 0.051910 0.045992 0.039825 [error]
Peak 0.014870 0.044567 0.054023 0.019354
0.009549 0.010318 0.009228 0.008094 [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 1.06e-07 2.10e-07 3.22e-07 1.08e-06 9.02e-07 1.72e-06 erg/cm2
Error 2.00e-08 2.40e-08 4.44e-08 3.25e-07 1.09e-07 3.57e-07 erg/cm2
Peak flux Power-law 2.03e-01 2.92e-01 3.11e-01 6.13e-01 9.97e-01 1.42e+00 ph/cm2/s
Error 9.48e-02 8.53e-02 6.97e-02 2.91e-01 2.29e-01 3.35e-01 ph/cm2/s
Fluence Cutoff-PL 1.04e-07 2.14e-07 3.26e-07 8.51e-07 8.92e-07 1.49e-06 erg/cm2
Error 2.22e-08 2.84e-08 4.72e-08 6.22e-07 1.20e-07 5.71e-07 erg/cm2
Peak flux Cutoff-PL 1.15e-01 3.01e-01 3.75e-01 1.86e-01 9.23e-01 9.76e-01 ph/cm2/s
Error 8.20e-02 1.07e-01 9.67e-02 3.02e-01 2.40e-01 3.66e-01 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 1.27e-01 2.99e-01 3.69e-01 2.27e-01 9.43e-01 1.02e+00 ph/cm2/s
Error -------- -------- 9.70e-02 -------- -------- -------- ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.381 0.187 - - 3.33e-03 3.60e-04 57.590 57
CPL 1.237 0.535 262.6 0.0 3.95e-03 4.07e-03 57.450 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.910 0.371 - - 8.68e-03 1.99e-03 64.780 57
CPL -0.959 2.515 94.8 358.2 5.20e-02 4.00e-01 61.730 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: 12.352000 sec.
T50 in the 50-300 keV band: 5.376000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 27.952 -11.080 16.872
T90 19.136 -6.632 12.504
T50 7.088 -0.552 6.536
Peak 1.000 3.484 4.484
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
233.4902 +6.1091 0.0168 26.4 -99.9 1.4290 11.5 TRIG_00932435
------------------------------------------
Foreground time interval of the image:
-11.080 16.872 (delta_t = 27.952 [sec])
Background time interval of the image:
-60.536 -11.080 (delta_t = 49.456 [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 -11.080 sec. to 16.872 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.38135 ( -0.187202 0.186508 )
Norm@50keV : 3.32789E-03 ( -0.000360717 0.000359587 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.59 using 59 PHA bins.
# Reduced chi-squared = 1.010 for 57 degrees of freedom
# Null hypothesis probability = 4.533548e-01
Photon flux (15-150 keV) in 27.95 sec: 0.403592 ( -0.0439435 0.0440004 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.02262e-07 ( -1.08753e-07 1.09887e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -11.080 sec. to 16.872 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.23668 ( -0.754857 0.31564 )
Epeak [keV] : 262.570 ( -262.587 -262.587 )
Norm@50keV : 3.94777E-03 ( -0.00266045 0.00547777 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.45 using 59 PHA bins.
# Reduced chi-squared = 1.026 for 56 degrees of freedom
# Null hypothesis probability = 4.211789e-01
Photon flux (15-150 keV) in 27.95 sec: 0.401275 ( -0.045205 0.045145 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.91834e-07 ( -1.21529e-07 1.17857e-07 ) ergs/cm2
Band function
Time interval is from -11.080 sec. to 16.872 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.50396 ( -4.50396 -4.50396 )
beta : -1.52598 ( -0.24828 0.227448 )
Epeak [keV] : 28.4227 ( -7.92188 5.88947 )
Norm@50keV : 68.2254 ( -7.2441 1.19787e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.55 using 59 PHA bins.
# Reduced chi-squared = 1.010 for 55 degrees of freedom
# Null hypothesis probability = 4.538445e-01
Photon flux (15-150 keV) in 27.95 sec: ( ) 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] : 15.1030 (-2.16901 2.68584)
R^2/D10^2 : 4.50836E-02 (-0.0194 0.0323509)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 79.23 using 59 PHA bins.
# Reduced chi-squared = 1.390 for 57 degrees of freedom
# Null hypothesis probability = 2.738257e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.011e-08 1.356e-08
25- 50 2.403e-07 3.857e-08
50-150 3.742e-07 7.770e-08
15-150 6.747e-07 9.894e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-49.22 -200)
Norm : 1.66451 (-0.178275 0.178275)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.59 using 59 PHA bins.
# Reduced chi-squared = 1.046 for 57 degrees of freedom
# Null hypothesis probability = 3.814733e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.159e-07 6.419e-08
25- 50 2.229e-07 1.217e-07
50-150 4.888e-07 2.664e-07
15-150 8.275e-07 4.510e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.63653 (-2.04898 2.29611)
R1^2/D10^2 : 0.227912 (-0.120802 0.311165)
kT2 [keV] : 40.7382 (-15.1882 96.0328)
R2^2/D10^2 : 1.32480E-03 (-0.00114638 0.00455791)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.38 using 59 PHA bins.
# Reduced chi-squared = 0.9887 for 55 degrees of freedom
# Null hypothesis probability = 4.983039e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.824e-08 3.340e-08
25- 50 2.336e-07 1.124e-07
50-150 5.849e-07 3.096e-07
15-150 9.168e-07 3.788e-07
Peak spectrum fit
Power-law model
Time interval is from 3.484 sec. to 4.484 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.909544 ( -0.387633 0.355184 )
Norm@50keV : 8.68408E-03 ( -0.0020103 0.0019759 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.78 using 59 PHA bins.
# Reduced chi-squared = 1.137 for 57 degrees of freedom
# Null hypothesis probability = 2.236733e-01
Photon flux (15-150 keV) in 1 sec: 0.996638 ( -0.227948 0.230964 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.7102e-08 ( -2.19971e-08 2.21695e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 3.484 sec. to 4.484 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.958560 ( -3.20596 1.8244 )
Epeak [keV] : 94.7565 ( -26.364 689.963 )
Norm@50keV : 5.20341E-02 ( -0.0520339 0.748709 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.73 using 59 PHA bins.
# Reduced chi-squared = 1.102 for 56 degrees of freedom
# Null hypothesis probability = 2.787704e-01
Photon flux (15-150 keV) in 1 sec: 0.923169 ( -0.237499 0.242721 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.0112e-08 ( -2.33888e-08 2.3759e-08 ) ergs/cm2
Band function
Time interval is from 3.484 sec. to 4.484 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.958997 ( -1.45508 3.21479 )
beta : -10.0000 ( 10 5.32907e-14 )
Epeak [keV] : 94.7367 ( -22.2969 175.655 )
Norm@50keV : 5.20655E-02 ( -0.0520655 0.747755 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.73 using 59 PHA bins.
# Reduced chi-squared = 1.122 for 55 degrees of freedom
# Null hypothesis probability = 2.481881e-01
Photon flux (15-150 keV) in 1 sec: 0.943228 ( ) 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] : 22.6773 (-4.81843 7.3211)
R^2/D10^2 : 3.46579E-02 (-0.0203558 0.0405568)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.80 using 59 PHA bins.
# Reduced chi-squared = 1.084 for 57 degrees of freedom
# Null hypothesis probability = 3.085909e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.252e-09 1.440e-09
25- 50 1.750e-08 8.040e-09
50-150 6.726e-08 3.074e-08
15-150 8.801e-08 4.025e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-57.8419 -200)
Norm : 4.12059 (-0.965541 0.965541)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.75 using 59 PHA bins.
# Reduced chi-squared = 1.276 for 57 degrees of freedom
# Null hypothesis probability = 7.800946e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.026e-08 6.115e-09
25- 50 1.974e-08 1.194e-08
50-150 4.329e-08 2.551e-08
15-150 7.328e-08 4.442e-08
Double BB
R1^2/D10^2 : 9.95179E-02 (-0.0773217 -0.0773217)
kT2 [keV] : 23.7503 (-6.09966 -24.0276)
R2^2/D10^2 : 2.89930E-02 (-0.027208 0.0470258)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.80 using 59 PHA bins.
#Fit statistic : Chi-Squared = 61.73 using 59 PHA bins.
#Fit statistic : Chi-Squared = 61.71 using 59 PHA bins.
# Reduced chi-squared = 1.124 for 55 degrees of freedom
# Reduced chi-squared = 1.122 for 55 degrees of freedom
# Reduced chi-squared = 1.122 for 55 degrees of freedom
# Null hypothesis probability = 2.461504e-01
# Null hypothesis probability = 2.481690e-01
# Null hypothesis probability = 2.487254e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Plot creation:
Fri Nov 1 16:30:08 EDT 2019