batgrbproduct analysis for trigger=1064377
batgrbproduct Analysis for Trigger=1064377
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): Sun Aug 8 21:27:43 EDT 2021
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1064377/GCN5_download_cron
======================================================================
Trigger: 01064377 Segment: 000
BAT Trigger Time: 650054528 [s; MET]
Trigger Stop: 650054648 [s; MET]
UTC: 2021-08-07T18:41:40.491980 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 245.132360352423 Dec: -15.8976942043072 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 16.39
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 16.39
Flight Position: [ source = BAT ]
RA: 245.132360352423 Dec: -15.8976942043072 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 245.13564629211 Dec: -15.9137893085912 [deg; J2000]
{ 16h 20m 32.6s , -15d 54' 49.6" }
+/- nan [arcmin] (estimated 90% radius based on SNR)
+/- 8.52082747691415 [arcmin] (formal 1-sigma fit error)
SNR: -1.41800496246451
Angular difference between Flight and Ground position is 0.984144 arcmin
Partial Coding Fraction: 0.4375 [ including projection effects ]
Duration
T90: 5.65199995040894 +/- 2.29026188941654
Measured from: 40.2840001583099
to: 45.9360001087189 [s; relative to TRIGTIME]
T50: 3.87199997901917 +/- 1.57344469500173
Measured from: 41.296000123024
to: 45.1680001020432 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 40.0440000295639
to: 41.0440000295639 [s; relative to TRIGTIME]
Total Fluence
Measured from: 39.404000043869
to: 47.0119999647141 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.181557 -0.017031 -0.015778 -0.027668
0.028257 0.026478 0.022987 0.021174 [error]
Peak 0.032941 0.027242 0.003474 -0.001768
0.010812 0.010459 0.009100 0.008487 [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 6.09e-08 9.73e-09 7.24e-10 5.76e-11 7.14e-08 7.14e-08 erg/cm2
Error 1.78e-08 1.11e-08 2.18e-09 5.14e-10 2.60e-08 2.61e-08 erg/cm2
Peak flux Power-law 5.82e-01 1.63e-01 2.45e-02 4.19e-03 7.72e-01 7.74e-01 ph/cm2/s
Error 2.20e-01 1.44e-01 4.50e-02 1.99e-02 2.92e-01 2.94e-01 ph/cm2/s
Fluence Cutoff-PL 6.36e-08 8.56e-09 4.46e-10 1.12e-11 7.14e-08 7.09e-08 erg/cm2
Error 1.97e-08 1.09e-08 2.04e-09 4.62e-10 2.48e-08 2.56e-08 erg/cm2
Peak flux Cutoff-PL 5.90e-01 1.47e-01 1.89e-02 2.94e-03 7.59e-01 7.65e-01 ph/cm2/s
Error -------- -------- -------- -------- -------- -------- 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 5.749 1.879 - - 1.10e-04 2.38e-04 61.170 57
CPL 1.000 0.000 50.0 0.0 3.20e-03 0.00e+00 90.230 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 3.731 1.983 - - 1.58e-03 2.16e-03 52.370 57
CPL 1.930 0.000 1.1 0.0 2.85e-02 0.00e+00 53.240 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 7.608 39.404 47.012
T90 5.652 40.284 45.936
T50 3.872 41.296 45.168
Peak 1.000 40.044 41.044
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
245.1356 -15.9138 0.1356 41.9 -154.8 -0.0787 -1.4 TRIG_01064377
------------------------------------------
Foreground time interval of the image:
39.404 46.020 (delta_t = 6.616 [sec])
47.000 47.012 (delta_t = 0.012 [sec])
Background time interval of the image:
-17.999 39.404 (delta_t = 57.403 [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
Multiple GTIs in the spectrum
tstart tstop
39.404000 46.020000
47.000000 47.012000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 5.74945 ( -1.44204 2.31642 )
Norm@50keV : 1.10429E-04 ( -0.000110428 0.00036638 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.17 using 59 PHA bins.
# Reduced chi-squared = 1.073 for 57 degrees of freedom
# Null hypothesis probability = 3.288340e-01
Photon flux (15-150 keV) in 6.628 sec: 0.353820 ( -0.110182 0.109921 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.1371e-08 ( -2.50218e-08 2.69804e-08 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
39.404000 46.020000
47.000000 47.012000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 3.19556E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 90.23 using 59 PHA bins.
# Reduced chi-squared = 1.611 for 56 degrees of freedom
# Null hypothesis probability = 2.540296e-03
Photon flux (15-150 keV) in 6.628 sec: 0.354022 ( -0.108746 0.114797 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.13783e-08 ( -2.39875e-08 2.57027e-08 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
39.404000 46.020000
47.000000 47.012000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -10.00000 ( 3.19293e-06 10 )
beta : -6.10909 ( -2.04962 1.79538 )
Epeak [keV] : 568.213 ( -568.213 -568.213 )
Norm@50keV : 1.00856E-02 ( -0.0107688 0.0552565 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.27 using 59 PHA bins.
# Reduced chi-squared = 1.114 for 55 degrees of freedom
# Null hypothesis probability = 2.611433e-01
Photon flux (15-150 keV) in 6.628 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] : 2.68605 (-0.77746 0.90626)
R^2/D10^2 : 108.157 (-108.157 1303.07)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.05 using 59 PHA bins.
# Reduced chi-squared = 1.071 for 57 degrees of freedom
# Null hypothesis probability = 3.326318e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.521e-08 3.682e-08
25- 50 6.353e-09 3.960e-09
50-150 3.954e-12 4.597e-12
15-150 7.157e-08 4.186e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 4.89966 (-1.99326 3.15113)
Norm : 89.8606 (-89.8606 778.059)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.400e-08 3.659e-08
25- 50 7.722e-09 5.233e-09
50-150 3.610e-11 4.229e-11
15-150 7.175e-08 4.143e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 0.219750 (-2.6888 -2.6888)
R1^2/D10^2 : 8.02796E+23 (-8.83861e+23 -8.84057e+23)
kT2 [keV] : 3.21606 (-0.895063 1.19093)
R2^2/D10^2 : 29.1482 (-24.6083 58.4546)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.528e-08 7.897e+01
25- 50 6.370e-09 6.293e+02
50-150 3.981e-12 1.443e+04
15-150 7.165e-08 1.605e+04
Peak spectrum fit
Power-law model
Time interval is from 40.044 sec. to 41.044 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.73123 ( -1.21937 2.74755 )
Norm@50keV : 1.57751E-03 ( -0.00157487 0.00273624 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.37 using 59 PHA bins.
# Reduced chi-squared = 0.9187 for 57 degrees of freedom
# Null hypothesis probability = 6.492891e-01
Photon flux (15-150 keV) in 1 sec: 0.772358 ( -0.2945 0.289002 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.87803e-08 ( -1.41003e-08 1.71296e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 40.044 sec. to 41.044 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.93004 ( )
Epeak [keV] : 1.14426 ( )
Norm@50keV : 2.85021E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.24 using 59 PHA bins.
# Reduced chi-squared = 0.9507 for 56 degrees of freedom
# Null hypothesis probability = 5.799483e-01
Photon flux (15-150 keV) in 1 sec: 0.758713 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.75723e-08 ( -1.29618e-08 1.84444e-08 ) ergs/cm2
Band function
Time interval is from 40.044 sec. to 41.044 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -8.69502 ( 8.69502 8.69502 )
beta : -3.73339 ( -2.75198 1.22099 )
Epeak [keV] : 2.11976 ( -2.11976 -2.11976 )
Norm@50keV : 0.213980 ( -0.213999 0.371942 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.37 using 59 PHA bins.
# Reduced chi-squared = 0.9521 for 55 degrees of freedom
# Null hypothesis probability = 5.758746e-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] : 3.60861 (-1.99212 3.7382)
R^2/D10^2 : 32.1473 (-35.4965 12119.1)
(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 1.735e-08 1.039e-08
25- 50 4.623e-09 3.337e-09
50-150 2.917e-11 3.945e-11
15-150 2.201e-08 1.353e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 11.4598 (-8.36094 23.6688)
Norm : 20.1184 (-19.8862 921.456)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.691e-08 1.011e-08
25- 50 8.661e-09 5.580e-09
50-150 8.447e-10 8.650e-10
15-150 2.642e-08 1.706e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.81509 (-1.399 1.9909)
R1^2/D10^2 : 2395.20 (-7104.66 -7135.63)
kT2 [keV] : 8.19115 (-4.05006 13.3619)
R2^2/D10^2 : 0.471192 (-0.625117 3.00993)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.485e-08 7.290e-09
25- 50 1.075e-08 7.065e-09
50-150 3.006e-09 3.096e-09
15-150 2.861e-08 1.575e-08
Plot creation:
Sun Aug 8 21:31:51 EDT 2021