batgrbproduct analysis for trigger=933083
batgrbproduct Analysis for Trigger=933083
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): Tue Nov 5 03:51:22 EST 2019
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger933083/GCN5_download_cron
======================================================================
Trigger: 00933083 Segment: 000
BAT Trigger Time: 594542064.128 [s; MET]
Trigger Stop: 594542064.16 [s; MET]
UTC: 2019-11-04T06:34:00.265580 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 293.743584088788 Dec: 21.895687200237 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 11.11
Image Trigger?: NO
Rate S/N Ratio: 31.7175030543074 [ if not an image trigger ]
Image S/N Ratio: 11.11
Flight Position: [ source = BAT ]
RA: 293.743584088788 Dec: 21.895687200237 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 293.740923995283 Dec: 21.9007005423156 [deg; J2000]
{ 19h 34m 57.8s , +21d 54' 02.5" }
+/- 1.88285077840276 [arcmin] (estimated 90% radius based on SNR)
+/- 1.01439642419304 [arcmin] (formal 1-sigma fit error)
SNR: 12.3175471659865
Angular difference between Flight and Ground position is 0.335278 arcmin
Partial Coding Fraction: 0.8515625 [ including projection effects ]
Duration
T90: 0.031999945640564 +/- 0.0113137314268704
Measured from: 1.19209289550781e-07
to: 0.0320000648498535 [s; relative to TRIGTIME]
T50: 0.0160000324249268 +/- 0.0056569500071322
Measured from: 0.00400006771087646
to: 0.0200001001358032 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.48199999332428
to: 0.51800000667572 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.00400006771087646
to: 0.0360000133514404 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.029108 0.021633 0.005178 0.001877
0.003318 0.003092 0.001946 0.001394 [error]
Peak 0.054665 0.024862 0.013039 -0.001332
0.008666 0.008274 0.007006 0.006392 [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 8.72e-09 7.96e-09 5.02e-09 4.85e-09 2.37e-08 2.66e-08 erg/cm2
Error 1.58e-09 1.37e-09 1.65e-09 2.92e-09 4.22e-09 5.72e-09 erg/cm2
Peak flux Power-law 4.79e-01 2.31e-01 6.77e-02 2.51e-02 7.92e-01 8.03e-01 ph/cm2/s
Error 1.44e-01 8.11e-02 5.05e-02 3.80e-02 2.03e-01 2.09e-01 ph/cm2/s
Fluence Cutoff-PL 8.92e-09 9.32e-09 2.10e-09 5.29e-11 2.04e-08 2.04e-08 erg/cm2
Error 1.72e-09 1.98e-09 2.74e-09 2.86e-09 4.50e-09 6.13e-09 erg/cm2
Peak flux Cutoff-PL 4.85e-01 2.26e-01 6.38e-02 2.20e-02 7.88e-01 8.00e-01 ph/cm2/s
Error -------- -------- -------- -------- 2.04e-01 2.10e-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 2.665 0.309 - - 5.65e-02 1.39e-02 38.420 57
CPL 0.425 3.200 21.0 8.9 2.09e+00 3.71e+03 36.180 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.768 0.751 - - 3.39e-03 2.68e-03 50.170 57
CPL 1.978 0.594 1.1 13.8 1.04e-02 0.00e+00 51.030 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 0.040 -0.004 0.036
T90 0.032 0.000 0.032
T50 0.016 0.004 0.020
Peak 1.000 -0.482 0.518
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
293.7409 +21.9007 0.0156 22.1 39.2 0.0601 12.3 TRIG_00933083
------------------------------------------
Foreground time interval of the image:
-0.004 0.036 (delta_t = 0.040 [sec])
Background time interval of the image:
-119.128 -0.004 (delta_t = 119.124 [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 -0.004 sec. to 0.036 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.66499 ( -0.292383 0.325451 )
Norm@50keV : 5.64547E-02 ( -0.0139373 0.0138783 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.42 using 59 PHA bins.
# Reduced chi-squared = 0.6740 for 57 degrees of freedom
# Null hypothesis probability = 9.720572e-01
Photon flux (15-150 keV) in 0.04 sec: 12.3126 ( -1.86827 1.86832 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.37365e-08 ( -4.1664e-09 4.27092e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.004 sec. to 0.036 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.424848 ( -4.77901 1.62048 )
Epeak [keV] : 21.0103 ( -11.7683 5.95178 )
Norm@50keV : 2.09445 ( -2.5229 7415.69 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 36.18 using 59 PHA bins.
# Reduced chi-squared = 0.6461 for 56 degrees of freedom
# Null hypothesis probability = 9.816619e-01
Photon flux (15-150 keV) in 0.04 sec: 12.1515 ( -1.8611 1.8605 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.03822e-08 ( -3.74928e-09 5.25668e-09 ) ergs/cm2
Band function
Time interval is from -0.004 sec. to 0.036 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.71668 ( -5.94966 -4.71668 )
beta : -3.43507 ( -1.09712 0.60483 )
Epeak [keV] : 22.7527 ( -2.9721 2.90724 )
Norm@50keV : 2.08933E+04 ( -3091.13 128944 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 32.40 using 59 PHA bins.
# Reduced chi-squared = 0.5892 for 55 degrees of freedom
# Null hypothesis probability = 9.934991e-01
Photon flux (15-150 keV) in 0.04 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] : 6.16031 (-0.80171 0.916036)
R^2/D10^2 : 42.6547 (-19.7363 36.6006)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 36.86 using 59 PHA bins.
# Reduced chi-squared = 0.6467 for 57 degrees of freedom
# Null hypothesis probability = 9.823499e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.927e-09 2.186e-09
25- 50 9.423e-09 2.454e-09
50-150 9.602e-10 5.394e-10
15-150 1.931e-08 4.172e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 24.1595 (-6.2693 9.33273)
Norm : 124.048 (-36.8772 53.7624)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 36.51 using 59 PHA bins.
# Reduced chi-squared = 0.6406 for 57 degrees of freedom
# Null hypothesis probability = 9.841723e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.884e-09 1.762e-09
25- 50 8.905e-09 1.954e-09
50-150 3.600e-09 1.852e-09
15-150 2.139e-08 4.592e-09
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.77621 (-0.941992 0.958481)
R1^2/D10^2 : 54.2860 (-24.0987 58.7886)
kT2 [keV] : 52.6127 (-39.0829 -53.0612)
R2^2/D10^2 : 6.25236E-03 (-0.00591117 0.249298)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 30.61 using 59 PHA bins.
# Reduced chi-squared = 0.5566 for 55 degrees of freedom
# Null hypothesis probability = 9.968676e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.169e-09 2.674e-09
25- 50 8.872e-09 3.114e-09
50-150 7.460e-09 4.315e-09
15-150 2.550e-08 7.614e-09
Peak spectrum fit
Power-law model
Time interval is from -0.482 sec. to 0.518 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.76802 ( -0.624216 0.877474 )
Norm@50keV : 3.39068E-03 ( -0.00339063 0.00197108 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.17 using 59 PHA bins.
# Reduced chi-squared = 0.8801 for 57 degrees of freedom
# Null hypothesis probability = 7.271702e-01
Photon flux (15-150 keV) in 1 sec: 0.792056 ( -0.202798 0.203038 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.69711e-08 ( -1.26843e-08 1.42422e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.482 sec. to 0.518 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.97781 ( -1.16739 0.0198871 )
Epeak [keV] : 1.05508 ( -0.690994 26.8454 )
Norm@50keV : 1.03988E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.03 using 59 PHA bins.
# Reduced chi-squared = 0.9113 for 56 degrees of freedom
# Null hypothesis probability = 6.630305e-01
Photon flux (15-150 keV) in 1 sec: 0.787752 ( -0.199519 0.207536 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.66124e-08 ( -1.25023e-08 1.45783e-08 ) ergs/cm2
Band function
Time interval is from -0.482 sec. to 0.518 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -2.50993 ( 2.50993 2.50993 )
beta : -2.76804 ( -0.877768 0.62378 )
Epeak [keV] : 1.00902 ( -1.00902 -1.00902 )
Norm@50keV : 0.460832 ( -0.248753 0.26829 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.17 using 59 PHA bins.
# Reduced chi-squared = 0.9121 for 55 degrees of freedom
# Null hypothesis probability = 6.594151e-01
Photon flux (15-150 keV) in 1 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] : 5.03754 (-1.77017 2.93263)
R^2/D10^2 : 5.90045 (-5.85136 44.702)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.01 using 59 PHA bins.
# Reduced chi-squared = 0.9827 for 57 degrees of freedom
# Null hypothesis probability = 5.121627e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.478e-08 8.495e-09
25- 50 9.835e-09 6.105e-09
50-150 4.146e-10 3.999e-10
15-150 2.503e-08 1.536e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 23.6284 (-13.0687 32.7277)
Norm : 7.83075 (-3.98042 13.9228)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.98 using 59 PHA bins.
# Reduced chi-squared = 0.9119 for 57 degrees of freedom
# Null hypothesis probability = 6.634170e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.381e-08 6.675e-09
25- 50 1.364e-08 7.420e-09
50-150 5.331e-09 4.642e-09
15-150 3.278e-08 1.457e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.09258 (-1.47053 1.91823)
R1^2/D10^2 : 54.6918 (-49.6038 3995.75)
kT2 [keV] : 14.0668 (-6.96468 19.3699)
R2^2/D10^2 : 5.82356E-02 (-0.0559987 0.137623)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.28 using 59 PHA bins.
# Reduced chi-squared = 0.8959 for 55 degrees of freedom
# Null hypothesis probability = 6.920818e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.475e-08 8.245e-09
25- 50 1.109e-08 6.015e-09
50-150 1.188e-08 8.840e-09
15-150 3.772e-08 2.003e-08
Plot creation:
Tue Nov 5 03:54:07 EST 2019