batgrbproduct analysis for trigger=1064421
batgrbproduct Analysis for Trigger=1064421
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): Tue Aug 10 16:02:39 EDT 2021
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1064421/batgroup_hand_proc
======================================================================
Trigger: 01064421 Segment: 000
BAT Trigger Time: 650069856 [s; MET]
Trigger Stop: 650069944 [s; MET]
UTC: 2021-08-07T22:57:08.490960 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 143.55062714072 Dec: -51.4089533078798 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 19.28
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 19.28
Flight Position: [ source = BAT ]
RA: 143.55062714072 Dec: -51.4089533078798 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 143.540327543634 Dec: -51.4091193162504 [deg; J2000]
{ 09h 34m 09.7s , -51d 24' 32.8" }
+/- 1.00344536502634 [arcmin] (estimated 90% radius based on SNR)
+/- 0.415408455740732 [arcmin] (formal 1-sigma fit error)
SNR: 30.2680524715879
Angular difference between Flight and Ground position is 0.385595 arcmin
Partial Coding Fraction: 0.203125 [ including projection effects ]
Duration
T90: 89.9719998836517 +/- 6.25575875610908
Measured from: -27.2319999933243
to: 62.7399998903275 [s; relative to TRIGTIME]
T50: 44.9959999322891 +/- 3.2013647152701
Measured from: -17.0599999427795
to: 27.9359999895096 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -24.2239999771118
to: -23.2239999771118 [s; relative to TRIGTIME]
Total Fluence
Measured from: -31.3600000143051
to: 78.567999958992 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 4.397756 6.501672 4.933653 1.182200
0.178077 0.187677 0.168393 0.147835 [error]
Peak 0.110342 0.136057 0.174820 0.053133
0.021201 0.023676 0.022788 0.018120 [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 1.89e-06 3.16e-06 4.03e-06 1.03e-05 1.19e-05 1.94e-05 erg/cm2
Error 1.24e-07 1.22e-07 1.75e-07 9.87e-07 4.27e-07 1.09e-06 erg/cm2
Peak flux Power-law 1.32e+00 1.33e+00 9.44e-01 1.07e+00 4.01e+00 4.66e+00 ph/cm2/s
Error 3.80e-01 2.35e-01 1.83e-01 4.30e-01 6.67e-01 7.40e-01 ph/cm2/s
Fluence Cutoff-PL 1.77e-06 3.23e-06 4.13e-06 7.18e-06 1.17e-05 1.63e-05 erg/cm2
Error 1.58e-07 1.36e-07 1.98e-07 1.79e-06 4.63e-07 1.80e-06 erg/cm2
Peak flux Cutoff-PL 1.32e+00 1.33e+00 9.45e-01 1.06e+00 4.01e+00 4.65e+00 ph/cm2/s
Error 2.20e-01 2.39e-01 1.86e-01 5.57e-01 6.66e-01 7.35e-01 ph/cm2/s
Fluence Band 1.71e-06 3.26e-06 4.05e-06 8.96e-06 1.17e-05 1.80e-05 erg/cm2
Error -------- 1.63e-07 -------- -------- 4.62e-07 -------- 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 1.651 0.063 - - 1.17e-02 4.04e-04 62.070 57
CPL 1.371 0.260 121.4 245.4 1.58e-02 4.39e-03 58.450 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.493 0.280 - - 3.22e-02 5.13e-03 60.450 57
CPL 1.459 0.000 855.1 0.0 3.35e-02 0.00e+00 60.480 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: 83.904000 sec.
T50 in the 50-300 keV band: 42.240000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 109.928 -31.360 78.568
T90 89.972 -27.232 62.740
T50 44.996 -17.060 27.936
Peak 1.000 -24.224 -23.224
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
143.5403 -51.4091 0.0064 50.8 -150.6 13.2220 30.3 TRIG_01064421
------------------------------------------
Foreground time interval of the image:
-14.299 78.568 (delta_t = 92.867 [sec])
Background time interval of the image:
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 -31.360 sec. to 78.568 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.65122 ( -0.0630705 0.0633111 )
Norm@50keV : 1.16683E-02 ( -0.000404522 0.000404376 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.07 using 59 PHA bins.
# Reduced chi-squared = 1.089 for 57 degrees of freedom
# Null hypothesis probability = 3.002995e-01
Photon flux (15-150 keV) in 109.9 sec: 1.52421 ( -0.0587319 0.0589562 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.19248e-05 ( -4.27255e-07 4.27718e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -31.360 sec. to 78.568 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.37073 ( -0.266988 0.252021 )
Epeak [keV] : 121.437 ( -34.6026 456.248 )
Norm@50keV : 1.57827E-02 ( -0.00366821 0.00511064 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.45 using 59 PHA bins.
# Reduced chi-squared = 1.044 for 56 degrees of freedom
# Null hypothesis probability = 3.854108e-01
Photon flux (15-150 keV) in 109.9 sec: 1.49449 ( -0.0638 0.06412 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.17385e-05 ( -4.64108e-07 4.6191e-07 ) ergs/cm2
Band function
Time interval is from -31.360 sec. to 78.568 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.12782 ( -0.389692 1.3782 )
beta : -1.79577 ( 1.79694 0.143895 )
Epeak [keV] : 75.8149 ( -42.9762 224.947 )
Norm@50keV : 2.18610E-02 ( -0.00889851 0.135841 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.80 using 59 PHA bins.
# Reduced chi-squared = 1.051 for 55 degrees of freedom
# Null hypothesis probability = 3.721652e-01
Photon flux (15-150 keV) in 109.9 sec: 1.48394 ( 5.51606 -0.06776 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.17041e-05 ( -1.17034e-05 -4.618e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 15.3677 ( )
R^2/D10^2 : 0.149104 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 237.37 using 59 PHA bins.
# Reduced chi-squared = 4.1643 for 57 degrees of freedom
# Null hypothesis probability = 7.185274e-24
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.068e-07 5.555e-08
25- 50 3.277e-06 1.566e-07
50-150 5.323e-06 3.572e-07
15-150 9.407e-06 3.467e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 168.757 (-26.6029 -169.017)
Norm : 6.15285 (-0.259972 0.278807)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.717e-06 1.017e-07
25- 50 3.236e-06 2.297e-07
50-150 6.691e-06 1.699e-06
15-150 1.164e-05 1.800e-06
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.78144 (-1.00979 1.0514)
R1^2/D10^2 : 1.13627 (-0.382995 0.689003)
kT2 [keV] : 27.6310 (-3.58306 5.23883)
R2^2/D10^2 : 1.36315E-02 (-0.00641353 0.00967857)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.526e-06 1.808e-07
25- 50 3.350e-06 2.621e-07
50-150 6.737e-06 8.583e-07
15-150 1.161e-05 1.158e-06
Peak spectrum fit
Power-law model
Time interval is from -24.224 sec. to -23.224 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.49347 ( -0.276729 0.28263 )
Norm@50keV : 3.21753E-02 ( -0.00514434 0.00512531 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.45 using 59 PHA bins.
# Reduced chi-squared = 1.060 for 57 degrees of freedom
# Null hypothesis probability = 3.524110e-01
Photon flux (15-150 keV) in 1 sec: 4.00972 ( -0.665292 0.668404 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.05561e-07 ( -5.2354e-08 5.26992e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -24.224 sec. to -23.224 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.45881 ( )
Epeak [keV] : 855.055 ( )
Norm@50keV : 3.34543E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.48 using 59 PHA bins.
# Reduced chi-squared = 1.080 for 56 degrees of freedom
# Null hypothesis probability = 3.173496e-01
Photon flux (15-150 keV) in 1 sec: 4.00916 ( -0.66723 0.6643 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.05547e-07 ( -5.2398e-08 5.248e-08 ) ergs/cm2
Band function
Time interval is from -24.224 sec. to -23.224 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.20275 ( 1.20276 1.20276 )
beta : -1.49346 ( 1.49346 0.277105 )
Epeak [keV] : 30.1338 ( -30.1325 -30.1325 )
Norm@50keV : 6.68460E-02 ( -0.0397499 5.00283 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.45 using 59 PHA bins.
# Reduced chi-squared = 1.099 for 55 degrees of freedom
# Null hypothesis probability = 2.855858e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 17.1737 (-3.41384 4.34602)
R^2/D10^2 : 0.283048 (-0.153683 0.327686)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.695e-08 6.092e-09
25- 50 7.562e-08 1.943e-08
50-150 1.598e-07 5.150e-08
15-150 2.523e-07 5.785e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.352 (-82.4047 -199.359)
Norm : 16.5003 (-2.61475 2.62032)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.109e-08 2.380e-08
25- 50 7.904e-08 4.443e-08
50-150 1.733e-07 9.770e-08
15-150 2.935e-07 1.646e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.31832 (-1.92455 3.90356)
R1^2/D10^2 : 12.3368 (-10.6754 43.5799)
kT2 [keV] : 26.0156 (-7.05527 20.5456)
R2^2/D10^2 : 5.80515E-02 (-0.0494123 0.0699417)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.485e-08 2.590e-08
25- 50 6.759e-08 2.774e-08
50-150 1.943e-07 1.152e-07
15-150 3.067e-07 1.486e-07
Plot creation:
Tue Aug 10 16:19:16 EDT 2021