batgrbproduct analysis for trigger=1000452
batgrbproduct Analysis for Trigger=1000452
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): Fri Oct 16 09:28:50 EDT 2020
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger1000452/batgroup_hand_proc
======================================================================
Trigger: 01000452 Segment: 000
BAT Trigger Time: 624495039.04 [s; MET]
Trigger Stop: 624495040.064 [s; MET]
UTC: 2020-10-15T22:50:13.228080 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 354.342753807982 Dec: 53.3932579228849 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6.85
Image Trigger?: NO
Rate S/N Ratio: 12.328828005938 [ if not an image trigger ]
Image S/N Ratio: 6.85
Flight Position: [ source = BAT ]
RA: 354.342753807982 Dec: 53.3932579228849 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 354.309838466314 Dec: 53.4458316080597 [deg; J2000]
{ 23h 37m 14.4s , +53d 26' 45.0" }
+/- 2.85700813364709 [arcmin] (estimated 90% radius based on SNR)
+/- 1.32074464886702 [arcmin] (formal 1-sigma fit error)
SNR: 6.78916354068611
Angular difference between Flight and Ground position is 3.366838 arcmin
Partial Coding Fraction: 0.3085938 [ including projection effects ]
Duration
T90: 9.77600002288818 +/- 3.47078317231481
Measured from: 0.0800000429153442
to: 9.85600006580353 [s; relative to TRIGTIME]
T50: 5.61600005626678 +/- 3.54576924455029
Measured from: 0.448000073432922
to: 6.06400012969971 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.0839999914169312
to: 1.08399999141693 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.0160000324249268
to: 10.3519999980927 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.278850 0.131204 0.030439 0.032479
0.041976 0.041950 0.035741 0.030560 [error]
Peak 0.111274 0.042507 0.032581 0.002479
0.015487 0.014805 0.011953 0.009454 [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 8.86e-08 6.55e-08 3.22e-08 2.25e-08 1.97e-07 2.09e-07 erg/cm2
Error 2.15e-08 2.36e-08 2.44e-08 3.55e-08 6.31e-08 8.07e-08 erg/cm2
Peak flux Power-law 1.22e+00 4.80e-01 1.10e-01 3.04e-02 1.83e+00 1.84e+00 ph/cm2/s
Error 2.75e-01 1.50e-01 7.46e-02 4.17e-02 3.74e-01 3.80e-01 ph/cm2/s
Fluence Cutoff-PL 8.88e-08 6.52e-08 3.17e-08 2.17e-08 1.96e-07 2.08e-07 erg/cm2
Error 1.89e-08 2.46e-08 3.05e-08 3.52e-08 6.82e-08 8.60e-08 erg/cm2
Peak flux Cutoff-PL 1.23e+00 4.69e-01 1.03e-01 2.68e-02 1.83e+00 1.84e+00 ph/cm2/s
Error 2.76e-01 -------- -------- -------- 3.75e-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 3.025 0.682 - - 1.57e-03 8.88e-04 43.940 0
CPL 1.961 0.000 1.0 0.0 9.53e-03 0.00e+00 44.380 0
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 3.127 0.627 - - 6.07e-03 3.19e-03 48.110 0
CPL 1.914 0.000 1.7 0.0 5.22e-02 0.00e+00 0.713 0
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 10.336 0.016 10.352
T90 9.776 0.080 9.856
T50 5.616 0.448 6.064
Peak 1.000 0.084 1.084
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
354.3098 +53.4458 0.0283 32.3 -86.3 0.5140 6.8 TRIG_01000452
------------------------------------------
Foreground time interval of the image:
0.016 10.352 (delta_t = 10.336 [sec])
Background time interval of the image:
-239.040 0.016 (delta_t = 239.056 [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 0.016 sec. to 10.352 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.02547 ( -0.587506 0.775984 )
Norm@50keV : 1.56535E-03 ( -0.000827564 0.000947945 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 43.94 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.98e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 10.34 sec: 0.438547 ( -0.1005 0.100947 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.96786e-07 ( -5.90524e-08 6.71135e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.016 sec. to 10.352 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.96097 ( )
Epeak [keV] : 0.982126 ( )
Norm@50keV : 9.52997E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared 44.38 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.69e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 10.34 sec: 0.438010 ( -0.100976 0.101216 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.95968e-07 ( -6.9248e-08 6.71118e-08 ) ergs/cm2
Band function
Time interval is from 0.016 sec. to 10.352 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.45758 ( 1.44759 1.44759 )
beta : -3.21740 ( 3.22441 0.773554 )
Epeak [keV] : 7.83695 ( -8.1528 14.21 )
Norm@50keV : 2.74627E-02 ( -0.0298787 4210.25 )
------------------------------------------------------------
Photon flux (15-150 keV) in 10.34 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] : 4.69772 (-1.06461 1.40003)
R^2/D10^2 : 4.84633 (-4.84733 12.4351)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 45.91 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.53e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.432e-08 5.397e-08
25- 50 5.265e-08 3.327e-08
50-150 1.568e-09 1.492e-09
15-150 1.485e-07 8.727e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 15.8909 (-6.64636 13.4104)
Norm : 7.05647 (-3.6052 9.1853)
------------------------------------------------------------
#Fit statistic : Chi-Squared 44.64 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.83e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.052e-08 3.945e-08
25- 50 6.520e-08 3.362e-08
50-150 1.288e-08 1.168e-08
15-150 1.686e-07 8.259e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.18735 (-4.18721 1.54458)
R1^2/D10^2 : 7.76149 (-7.76274 -7.76274)
kT2 [keV] : 20.9937 (-20.9871 -20.9871)
R2^2/D10^2 : 4.09617E-03 (-0.00410074 5.87421)
------------------------------------------------------------
#Fit statistic : Chi-Squared 43.27 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.74e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.424e-08 5.423e-08
25- 50 5.538e-08 2.917e-08
50-150 6.014e-08 4.267e-08
15-150 2.098e-07 1.179e-07
Peak spectrum fit
Power-law model
Time interval is from 0.084 sec. to 1.084 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.12683 ( -0.548316 0.704803 )
Norm@50keV : 6.06878E-03 ( -0.00299047 0.00338436 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 48.11 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 7.93e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 1.83298 ( -0.374125 0.374768 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.75064e-08 ( -2.05516e-08 2.26439e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.084 sec. to 1.084 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.91393 ( )
Epeak [keV] : 1.72745 ( )
Norm@50keV : 5.21654E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared 49.63 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 7.13e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 1.82527 ( -0.36856 0.38237 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.68213e-08 ( -2.15039e-08 2.27017e-08 ) ergs/cm2
Band function
Time interval is from 0.084 sec. to 1.084 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.41039 ( 0.832525 0.832525 )
beta : -3.40413 ( 3.31029 0.703913 )
Epeak [keV] : 16.2242 ( -10.8935 62.0034 )
Norm@50keV : 2119.06 ( -2176.69 2.10899e+07 )
------------------------------------------------------------
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] : 4.24963 (-0.794118 0.99334)
R^2/D10^2 : 33.3656 (-21.479 64.2737)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 50.40 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 7.19e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.038e-08 2.242e-08
25- 50 1.727e-08 1.059e-08
50-150 2.993e-10 2.924e-10
15-150 5.795e-08 3.299e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.1109 (-4.8345 10.4214)
Norm : 37.5289 (-19.7764 49.2826)
------------------------------------------------------------
#Fit statistic : Chi-Squared 49.96 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 7.34e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.823e-08 1.502e-08
25- 50 2.283e-08 1.071e-08
50-150 3.048e-09 2.726e-09
15-150 6.410e-08 2.702e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.84111 (-0.809882 0.92985)
R1^2/D10^2 : 51.2687 (-33.9262 128.375)
kT2 [keV] : 21.6428 (-10.0406 44.9216)
R2^2/D10^2 : 1.79059E-02 (-0.0171523 0.105853)
------------------------------------------------------------
#Fit statistic : Chi-Squared 44.29 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.49e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.975e-08 2.213e-08
25- 50 2.045e-08 1.084e-08
50-150 2.876e-08 1.931e-08
15-150 8.895e-08 4.893e-08
Plot creation:
Fri Oct 16 12:22:47 EDT 2020