batgrbproduct analysis for trigger=1062273
batgrbproduct Analysis for Trigger=1062273
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 1 13:53:31 EDT 2021
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1062273/GCN5_download_cron
======================================================================
Trigger: 01062273 Segment: 000
BAT Trigger Time: 649434816 [s; MET]
Trigger Stop: 649435608 [s; MET]
UTC: 2021-07-31T14:33:08.533400 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 255.992366005401 Dec: -37.8507922356419 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 17.05
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 17.05
Flight Position: [ source = BAT ]
RA: 255.992366005401 Dec: -37.8507922356419 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 256.009138467388 Dec: -37.8671996683744 [deg; J2000]
{ 17h 04m 02.2s , -37d 52' 01.9" }
+/- 1.59317832392717 [arcmin] (estimated 90% radius based on SNR)
+/- 0.808768107615894 [arcmin] (formal 1-sigma fit error)
SNR: 15.637569500182
Angular difference between Flight and Ground position is 1.265077 arcmin
Partial Coding Fraction: 0.890625 [ including projection effects ]
Duration
T90: 790.980000019073 +/- 33.8951768451588
Measured from: -25.0999999046326
to: 765.880000114441 [s; relative to TRIGTIME]
T50: 405.379999995232 +/- 33.7142259239273
Measured from: 117.400000095367
to: 522.780000090599 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -56.3079999685287
to: -55.3079999685287 [s; relative to TRIGTIME]
Total Fluence
Measured from: -56.2120000123978
to: 844.667999982834 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 11.465103 8.358437 1.402259 0.524868
0.290327 0.256148 0.211497 0.186283 [error]
Peak 0.024360 0.043244 0.020659 0.014175
0.016302 0.014609 0.011580 0.010057 [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 5.16e-06 3.38e-06 1.44e-06 8.39e-07 1.04e-05 1.08e-05 erg/cm2
Error 4.89e-07 1.65e-07 1.85e-07 2.20e-07 5.15e-07 5.18e-07 erg/cm2
Peak flux Power-law 3.36e-01 2.30e-01 1.03e-01 6.40e-02 7.01e-01 7.35e-01 ph/cm2/s
Error 4.09e-01 1.47e-01 8.26e-02 1.15e-01 4.94e-01 4.91e-01 ph/cm2/s
Fluence Cutoff-PL 4.13e-06 3.57e-06 1.13e-06 1.07e-07 8.92e-06 8.93e-06 erg/cm2
Error 7.63e-07 2.08e-07 2.87e-07 2.03e-07 9.92e-07 1.04e-06 erg/cm2
Peak flux Cutoff-PL 5.45e-02 2.41e-01 1.40e-01 3.57e-03 4.40e-01 4.39e-01 ph/cm2/s
Error 2.49e-01 1.80e-01 1.16e-01 5.36e-02 3.85e-01 3.94e-01 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 6.64e-02 2.40e-01 1.47e-01 9.86e-03 4.61e-01 5.26e-01 ph/cm2/s
Error 2.47e-01 1.67e-01 1.12e-01 -------- -------- -------- ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 3.231 0.158 - - 8.71e-04 7.54e-05 72.090 53
CPL 1.639 0.876 8.6 0.0 7.26e-03 0.00e+00 65.890 52
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.120 1.316 - - 4.36e-03 2.84e-03 31.880 53
CPL -4.545 0.000 51.3 0.0 4.62e+00 0.00e+00 29.500 52
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 900.880 -56.212 844.668
T90 790.980 -25.100 765.880
T50 405.380 117.400 522.780
Peak 1.000 -56.308 -55.308
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
256.0091 -37.8672 0.0122 25.9 -153.8 21.4504 15.6 TRIG_01062273
------------------------------------------
Foreground time interval of the image:
-15.899 77.000 (delta_t = 92.899 [sec])
86.000 145.840 (delta_t = 59.840 [sec])
147.000 255.910 (delta_t = 108.910 [sec])
257.000 379.240 (delta_t = 122.240 [sec])
380.000 435.260 (delta_t = 55.260 [sec])
436.000 502.820 (delta_t = 66.820 [sec])
503.000 503.260 (delta_t = 0.260 [sec])
504.000 504.160 (delta_t = 0.160 [sec])
506.000 805.401 (delta_t = 299.401 [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
Multiple GTIs in the spectrum
tstart tstop
-56.212000 77.000000
86.000000 145.840000
147.000000 255.910000
257.000000 379.240000
380.000000 435.260000
436.000000 502.820000
503.000000 503.260000
504.000000 504.160000
506.000000 844.668000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.23144 ( -0.15387 0.162394 )
Norm@50keV : 8.70519E-04 ( -7.56656e-05 7.51076e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.09 using 55 PHA bins.
# Reduced chi-squared = 1.360 for 53 degrees of freedom
# Null hypothesis probability = 4.164049e-02
Photon flux (15-150 keV) in 885.4 sec: 0.284697 ( -0.0190581 0.020096 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.03928e-05 ( -5.12496e-07 5.16587e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-56.212000 77.000000
86.000000 145.840000
147.000000 255.910000
257.000000 379.240000
380.000000 435.260000
436.000000 502.820000
503.000000 503.260000
504.000000 504.160000
506.000000 844.668000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.63862 ( -1.30428 0.447136 )
Epeak [keV] : 8.62645 ( )
Norm@50keV : 7.26469E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.89 using 55 PHA bins.
# Reduced chi-squared = 1.267 for 52 degrees of freedom
# Null hypothesis probability = 9.325597e-02
Photon flux (15-150 keV) in 885.4 sec: 0.242180 ( -0.029299 0.033069 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.91739e-06 ( -9.23968e-07 1.06089e-06 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-56.212000 77.000000
86.000000 145.840000
147.000000 255.910000
257.000000 379.240000
380.000000 435.260000
436.000000 502.820000
503.000000 503.260000
504.000000 504.160000
506.000000 844.668000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.45192 ( )
beta : -8.89282 ( )
Epeak [keV] : 24.7621 ( )
Norm@50keV : 3.56777E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 158.07 using 55 PHA bins.
# Reduced chi-squared = 3.0994 for 51 degrees of freedom
# Null hypothesis probability = 6.928828e-13
Photon flux (15-150 keV) in 885.4 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] : 6.96147 (-0.351803 0.367618)
R^2/D10^2 : 0.405949 (-0.0886482 0.115994)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 81.02 using 55 PHA bins.
# Reduced chi-squared = 1.529 for 53 degrees of freedom
# Null hypothesis probability = 7.902900e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.782e-06 2.413e-07
25- 50 3.770e-06 2.152e-07
50-150 6.123e-07 1.075e-07
15-150 7.164e-06 3.754e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 21.9961 (-1.87134 2.11279)
Norm : 2.55359 (-0.296495 0.339928)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.785e-06 2.457e-07
25- 50 3.557e-06 1.700e-07
50-150 1.244e-06 2.032e-07
15-150 8.586e-06 3.958e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.94818 (-1.16053 1.07126)
R1^2/D10^2 : 1.44677 (-0.693342 2.13364)
kT2 [keV] : 10.8383 (-2.67788 11.148)
R2^2/D10^2 : 2.79349E-02 (-0.026534 0.121587)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.593e-06 8.907e-07
25- 50 3.580e-06 9.664e-07
50-150 1.175e-06 5.865e-07
15-150 8.348e-06 2.336e-06
Peak spectrum fit
Power-law model
Time interval is from -56.308 sec. to -55.308 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.12017 ( -1.11537 1.51751 )
Norm@50keV : 4.36181E-03 ( -0.00290747 0.00276915 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 31.88 using 55 PHA bins.
# Reduced chi-squared = 0.6014 for 53 degrees of freedom
# Null hypothesis probability = 9.905094e-01
Photon flux (15-150 keV) in 1 sec: 0.700657 ( -0.447524 0.540275 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.04996e-08 ( -2.47241e-08 2.52652e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -56.308 sec. to -55.308 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -4.54468 ( )
Epeak [keV] : 51.3491 ( )
Norm@50keV : 4.61514 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 29.50 using 55 PHA bins.
# Reduced chi-squared = 0.5673 for 52 degrees of freedom
# Null hypothesis probability = 9.949661e-01
Photon flux (15-150 keV) in 1 sec: 0.439747 ( -0.268399 0.501113 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.11963e-08 ( -1.80861e-08 2.4605e-08 ) ergs/cm2
Band function
Time interval is from -56.308 sec. to -55.308 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.81226 ( -6.26078 -4.81226 )
beta : -9.37167 ( 9.37167 19.3587 )
Epeak [keV] : 53.6378 ( -18.9146 19.4636 )
Norm@50keV : 4.58108 ( -2.43591 1.28282e+07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 29.55 using 55 PHA bins.
# Reduced chi-squared = 0.5793 for 51 degrees of freedom
# Null hypothesis probability = 9.930174e-01
Photon flux (15-150 keV) in 1 sec: 0.461072 ( ) 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] : 11.3514 (-4.80098 6.46863)
R^2/D10^2 : 0.223233 (-0.223233 1.58083)
(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 6.044e-09 4.091e-09
25- 50 1.778e-08 1.132e-08
50-150 1.325e-08 9.830e-09
15-150 3.708e-08 2.452e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 50.3867 (-50.6271 -50.6271)
Norm : 4.33666 (-2.43137 5.92027)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.062e-08 6.975e-09
25- 50 1.530e-08 1.005e-08
50-150 1.496e-08 1.252e-08
15-150 4.088e-08 2.886e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.80950 (-2.81969 13.0504)
R1^2/D10^2 : 47.7304 (-47.4197 -47.4197)
kT2 [keV] : 12.9930 (-5.24869 -13.0141)
R2^2/D10^2 : 0.119059 (-0.118553 0.843384)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.013e-08 4.945e-09
25- 50 1.535e-08 9.900e-09
50-150 1.566e-08 1.182e-08
15-150 4.114e-08 2.323e-08
Plot creation:
Sun Aug 1 14:00:43 EDT 2021