batgrbproduct analysis for trigger=932058
batgrbproduct Analysis for Trigger=932058
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 31 01:57:49 EDT 2019
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger932058/batgroup_hand_proc
======================================================================
Trigger: 00932058 Segment: 000
BAT Trigger Time: 594040544 [s; MET]
Trigger Stop: 594040608 [s; MET]
UTC: 2019-10-29T11:15:20.169860 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 352.139953073243 Dec: -40.4638223155307 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.55
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 9.55
Flight Position: [ source = BAT ]
RA: 352.139953073243 Dec: -40.4638223155307 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 352.13995 Dec: -40.46382 [deg; J2000]
{ 23h 28m 33.6s , -40d -27' -49.8" }
+/- 1.81268656623 [arcmin] (estimated 90% radius based on SNR)
SNR: 13.005969940618332
Angular difference between Flight and Ground position is 0.000197 arcmin
Partial Coding Fraction: 0.4609375 [ including projection effects ]
Duration
T90: 39.4720001220703 +/- 7.94235234142455
Measured from: 0.0399999618530273
to: 39.5120000839233 [s; relative to TRIGTIME]
T50: 19.6960000991821 +/- 7.4011415456744
Measured from: 3.1599999666214
to: 22.8560000658035 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 1.89999997615814
to: 2.89999997615814 [s; relative to TRIGTIME]
Total Fluence
Measured from: -1.04799997806549
to: 45.8480000495911 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.549107 0.697493 0.445379 0.020134
0.065985 0.069095 0.062162 0.057652 [error]
Peak 0.019425 0.069810 0.026526 0.010484
0.010421 0.010624 0.009568 0.008632 [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 1.91e-07 2.98e-07 3.48e-07 7.86e-07 1.07e-06 1.62e-06 erg/cm2
Error 3.30e-08 3.35e-08 6.20e-08 2.87e-07 1.44e-07 3.46e-07 erg/cm2
Peak flux Power-law 3.75e-01 3.61e-01 2.43e-01 2.55e-01 1.08e+00 1.23e+00 ph/cm2/s
Error 1.38e-01 8.91e-02 7.47e-02 1.53e-01 2.61e-01 2.99e-01 ph/cm2/s
Fluence Cutoff-PL 1.82e-07 3.11e-07 3.51e-07 4.25e-07 1.03e-06 1.27e-06 erg/cm2
Error 3.77e-08 4.33e-08 6.59e-08 4.35e-07 1.59e-07 4.25e-07 erg/cm2
Peak flux Cutoff-PL 2.49e-01 5.70e-01 8.61e-02 1.20e-04 9.04e-01 9.06e-01 ph/cm2/s
Error 1.69e-01 1.89e-01 -------- 1.02e-01 2.93e-01 3.04e-01 ph/cm2/s
Fluence Band 1.79e-07 3.11e-07 3.53e-07 4.21e-07 1.03e-06 1.27e-06 erg/cm2
Error 3.71e-08 -------- 6.22e-08 -------- -------- -------- 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 1.774 0.209 - - 2.47e-03 3.21e-04 45.770 57
CPL 1.390 0.741 73.4 -22.3 3.98e-03 6.10e-03 45.070 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.573 0.383 - - 8.48e-03 2.13e-03 69.360 57
CPL -5.526 0.716 37.1 62.7 2.35e+02 9.44e+04 66.030 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: 7.808000 sec.
T50 in the 50-300 keV band: 4.672000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 46.896 -1.048 45.848
T90 39.472 0.040 39.512
T50 19.696 3.160 22.856
Peak 1.000 1.900 2.900
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
352.140 -40.464 0.03 33.5 38.5 1.2399 13.0 TRIG_00932058
------------------------------------------
Foreground time interval of the image:
-1.048 20.0 (delta_t = 21.048 [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 -1.048 sec. to 45.848 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.77387 ( -0.204395 0.213433 )
Norm@50keV : 2.46957E-03 ( -0.000324123 0.000316957 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.77 using 59 PHA bins.
# Reduced chi-squared = 0.8029 for 57 degrees of freedom
# Null hypothesis probability = 8.569500e-01
Photon flux (15-150 keV) in 46.9 sec: 0.336916 ( -0.0381424 0.0381636 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.06742e-06 ( -1.42369e-07 1.4501e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -1.048 sec. to 45.848 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.38957 ( -0.915008 0.566189 )
Epeak [keV] : 73.3571 ( -28.6937 -73.3571 )
Norm@50keV : 3.97795E-03 ( -0.00397795 0.00821406 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.07 using 59 PHA bins.
# Reduced chi-squared = 0.8047 for 56 degrees of freedom
# Null hypothesis probability = 8.520381e-01
Photon flux (15-150 keV) in 46.9 sec: 0.331290 ( -0.039865 0.039739 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.0326e-06 ( -1.57101e-07 1.60576e-07 ) ergs/cm2
Band function
Time interval is from -1.048 sec. to 45.848 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.39002 ( -0.462716 0.999454 )
beta : -10.0000 ( 10 20 )
Epeak [keV] : 73.3611 ( -28.6907 -73.3611 )
Norm@50keV : 3.97543E-03 ( -0.00171677 0.00821785 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.07 using 59 PHA bins.
# Reduced chi-squared = 0.8194 for 55 degrees of freedom
# Null hypothesis probability = 8.280542e-01
Photon flux (15-150 keV) in 46.9 sec: 0.330783 ( 6.66922 -0.038922 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.03326e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 12.1506 (-1.65087 1.93312)
R^2/D10^2 : 7.69810E-02 (-0.0321045 0.054431)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.41 using 59 PHA bins.
# Reduced chi-squared = 1.095 for 57 degrees of freedom
# Null hypothesis probability = 2.899931e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.128e-07 2.394e-08
25- 50 3.603e-07 5.035e-08
50-150 3.225e-07 8.315e-08
15-150 7.957e-07 1.238e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 113.042 (-41.2019 81.4714)
Norm : 1.43536 (-0.198645 0.269581)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.18 using 59 PHA bins.
# Reduced chi-squared = 0.7927 for 57 degrees of freedom
# Null hypothesis probability = 8.708225e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.757e-07 2.753e-08
25- 50 3.110e-07 5.365e-08
50-150 5.386e-07 2.795e-07
15-150 1.025e-06 3.229e-07
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.68380 (-2.67656 3.51354)
R1^2/D10^2 : 1.59197 (-1.39053 4.72899)
kT2 [keV] : 17.8609 (-4.75976 12.337)
R2^2/D10^2 : 1.56920E-02 (-0.0139336 0.0149435)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.24 using 59 PHA bins.
#Fit statistic : Chi-Squared = 46.23 using 59 PHA bins.
# Reduced chi-squared = 0.8408 for 55 degrees of freedom
# Reduced chi-squared = 0.8406 for 55 degrees of freedom
# Null hypothesis probability = 7.936814e-01
# Null hypothesis probability = 7.940271e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.871e-07 9.190e-08
25- 50 2.916e-07 1.154e-07
50-150 4.937e-07 2.234e-07
15-150 9.723e-07 3.756e-07
Peak spectrum fit
Power-law model
Time interval is from 1.900 sec. to 2.900 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.57341 ( -0.37917 0.386051 )
Norm@50keV : 8.48133E-03 ( -0.00214171 0.00211234 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.36 using 59 PHA bins.
# Reduced chi-squared = 1.217 for 57 degrees of freedom
# Null hypothesis probability = 1.261256e-01
Photon flux (15-150 keV) in 1 sec: 1.08114 ( -0.260565 0.261096 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.95782e-08 ( -2.10917e-08 2.16931e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.900 sec. to 2.900 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -5.52605 ( 4.17214 5.60375 )
Epeak [keV] : 37.0574 ( -5.99282 119.311 )
Norm@50keV : 235.438 ( -235.521 188533 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.03 using 59 PHA bins.
# Reduced chi-squared = 1.179 for 56 degrees of freedom
# Null hypothesis probability = 1.688479e-01
Photon flux (15-150 keV) in 1 sec: 0.903964 ( -0.246861 0.338186 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.82963e-08 ( -1.94231e-08 3.87893e-08 ) ergs/cm2
Band function
Time interval is from 1.900 sec. to 2.900 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -4.38459 -5 )
beta : -2.62877 ( -2.72659 0.84886 )
Epeak [keV] : 35.6655 ( -8.02062 6.71653 )
Norm@50keV : 137.659 ( -30.7658 495.331 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.26 using 59 PHA bins.
# Reduced chi-squared = 1.132 for 55 degrees of freedom
# Null hypothesis probability = 2.337402e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 6.93259e-08 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.9427 (-2.21989 3.27859)
R^2/D10^2 : 0.399699 (-0.251031 0.531874)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.78 using 59 PHA bins.
# Reduced chi-squared = 1.172 for 57 degrees of freedom
# Null hypothesis probability = 1.762698e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.990e-09 4.409e-09
25- 50 2.806e-08 1.163e-08
50-150 1.890e-08 1.039e-08
15-150 5.695e-08 2.110e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 165.040 (-101.347 -161.945)
Norm : 4.50156 (-1.10098 1.6537)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.40 using 59 PHA bins.
# Reduced chi-squared = 1.200 for 57 degrees of freedom
# Null hypothesis probability = 1.434334e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.146e-08 6.730e-09
25- 50 2.153e-08 1.244e-08
50-150 4.414e-08 2.659e-08
15-150 7.712e-08 4.537e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 52.7820 (-52.7259 -52.726)
R1^2/D10^2 : 1.06566E-03 (-0.00105658 0.0986359)
kT2 [keV] : 9.34891 (-1.8807 3.0791)
R2^2/D10^2 : 0.622268 (-0.394947 1.02213)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.68 using 59 PHA bins.
# Reduced chi-squared = 1.158 for 55 degrees of freedom
# Null hypothesis probability = 1.975146e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.110e-08 6.810e-09
25- 50 2.658e-08 1.573e-08
50-150 3.963e-08 2.200e-08
15-150 7.731e-08 3.665e-08
Plot creation:
Thu Oct 31 04:15:54 EDT 2019