batgrbproduct analysis for trigger=1061554
batgrbproduct Analysis for Trigger=1061554
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 Jul 25 17:49:31 EDT 2021
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1061554/GCN5_download_cron
======================================================================
Trigger: 01061554 Segment: 000
BAT Trigger Time: 648907275.456 [s; MET]
Trigger Stop: 648907278.528 [s; MET]
UTC: 2021-07-25T12:00:48.024580 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 192.932182299759 Dec: 17.1251868322912 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.81
Image Trigger?: NO
Rate S/N Ratio: 11 [ if not an image trigger ]
Image S/N Ratio: 7.81
Flight Position: [ source = BAT ]
RA: 192.932182299759 Dec: 17.1251868322912 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 192.887673551261 Dec: 17.0987131971573 [deg; J2000]
{ 12h 51m 33.0s , +17d 05' 55.4" }
+/- 3.23860678313342 [arcmin] (estimated 90% radius based on SNR)
+/- 1.53999278392616 [arcmin] (formal 1-sigma fit error)
SNR: 5.6759061635521
Angular difference between Flight and Ground position is 3.006216 arcmin
Partial Coding Fraction: 0.984375 [ including projection effects ]
Duration
T90: 418.959999918938 +/- 158.544527437542
Measured from: 0.980000138282776
to: 419.94000005722 [s; relative to TRIGTIME]
T50: 318.488000035286 +/- 312.383311897674
Measured from: 6.08400011062622
to: 324.572000145912 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.972000002861023
to: 1.97200000286102 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.220000028610229
to: 439.932000041008 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.331328 0.522883 0.463459 0.010883
0.142535 0.147971 0.131222 0.121055 [error]
Peak 0.018476 0.026419 0.026144 0.020543
0.006884 0.007501 0.006963 0.006392 [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 1.42e-07 2.30e-07 2.82e-07 6.83e-07 8.49e-07 1.34e-06 erg/cm2
Error 9.52e-08 8.11e-08 1.28e-07 8.67e-07 2.91e-07 8.42e-07 erg/cm2
Peak flux Power-law 1.91e-01 2.04e-01 1.55e-01 1.92e-01 6.24e-01 7.43e-01 ph/cm2/s
Error 1.48e-01 8.11e-02 5.89e-02 1.98e-01 2.11e-01 2.20e-01 ph/cm2/s
Fluence Cutoff-PL 1.01e-07 2.36e-07 3.00e-07 2.61e-07 7.76e-07 9.30e-07 erg/cm2
Error 1.23e-07 8.91e-08 1.51e-07 4.24e-07 3.33e-07 9.04e-07 erg/cm2
Peak flux Cutoff-PL 1.95e-01 2.06e-01 1.54e-01 1.86e-01 6.26e-01 7.41e-01 ph/cm2/s
Error 1.43e-01 8.06e-02 5.90e-02 2.41e-01 2.01e-01 2.17e-01 ph/cm2/s
Fluence Band 1.03e-07 2.34e-07 3.02e-07 2.40e-07 7.81e-07 8.81e-07 erg/cm2
Error -------- 8.60e-08 -------- 4.01e-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 1.706 0.735 - - 2.09e-04 6.88e-05 37.010 53
CPL 0.508 3.545 69.3 0.0 6.97e-04 0.00e+00 36.610 52
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.398 0.773 - - 5.12e-03 1.50e-03 66.890 53
CPL 2.243 1.761 88.3 0.0 2.26e-03 0.00e+00 66.340 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: 4.288000 sec.
T50 in the 50-300 keV band: 1.856000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 439.712 0.220 439.932
T90 418.960 0.980 419.940
T50 318.488 6.084 324.572
Peak 1.000 0.972 1.972
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
192.8877 +17.0987 0.0340 11.4 147.6 0.5192 5.7 TRIG_01061554
------------------------------------------
Foreground time interval of the image:
0.220 43.845 (delta_t = 43.625 [sec])
Background time interval of the image:
-239.456 0.220 (delta_t = 239.676 [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 0.220 sec. to 439.932 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.70555 ( -0.674719 0.794548 )
Norm@50keV : 2.08605E-04 ( -6.97944e-05 6.78629e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.01 using 55 PHA bins.
# Reduced chi-squared = 0.6983 for 53 degrees of freedom
# Null hypothesis probability = 9.532846e-01
Photon flux (15-150 keV) in 439.7 sec: 2.77592E-02 ( -0.00952333 0.0103768 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.48876e-07 ( -2.84254e-07 2.98353e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.220 sec. to 439.932 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.508363 ( -5.42978 1.65959 )
Epeak [keV] : 69.3183 ( )
Norm@50keV : 6.96808E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 36.61 using 55 PHA bins.
# Reduced chi-squared = 0.7041 for 52 degrees of freedom
# Null hypothesis probability = 9.476937e-01
Photon flux (15-150 keV) in 439.7 sec: 2.45055E-02 ( -0.0105181 0.0125619 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.75618e-07 ( -3.1672e-07 3.49148e-07 ) ergs/cm2
Band function
Time interval is from 0.220 sec. to 439.932 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.714585 ( -1.01978 0.980222 )
beta : -9.37167 ( 9.37113 19.3711 )
Epeak [keV] : 73.1650 ( -56.9536 -73.1629 )
Norm@50keV : 5.61011E-04 ( -0.000561052 40879.8 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 36.62 using 55 PHA bins.
# Reduced chi-squared = 0.7181 for 51 degrees of freedom
# Null hypothesis probability = 9.353421e-01
Photon flux (15-150 keV) in 439.7 sec: 2.55431E-02 ( 6.97446 -0.0115663 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.81074e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 15.6989 (-5.01287 7.56563)
R^2/D10^2 : 2.44524E-03 (-0.00244524 0.00720282)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.20 using 55 PHA bins.
# Reduced chi-squared = 0.7019 for 53 degrees of freedom
# Null hypothesis probability = 9.509560e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.501e-08 3.691e-08
25- 50 2.277e-07 1.355e-07
50-150 3.894e-07 2.614e-07
15-150 6.721e-07 4.171e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.362 (-199.363 -199.363)
Norm : 0.101496 (-0.0301794 0.0302111)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.111e-07 6.905e-08
25- 50 2.138e-07 1.292e-07
50-150 4.689e-07 2.871e-07
15-150 7.937e-07 4.977e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.15040 (-5.17947 -5.17947)
R1^2/D10^2 : 4.96177E-02 (-0.0495139 -0.0495139)
kT2 [keV] : 18.2938 (-18.322 -18.322)
R2^2/D10^2 : 1.29271E-03 (-0.00129057 0.00603512)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.753e-08 6.198e-08
25- 50 2.192e-07 1.242e-07
50-150 4.345e-07 2.803e-07
15-150 7.512e-07 4.340e-07
Peak spectrum fit
Power-law model
Time interval is from 0.972 sec. to 1.972 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.39807 ( -0.752398 0.794189 )
Norm@50keV : 5.12307E-03 ( -0.00150416 0.00150398 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.89 using 55 PHA bins.
# Reduced chi-squared = 1.262 for 53 degrees of freedom
# Null hypothesis probability = 9.510009e-02
Photon flux (15-150 keV) in 1 sec: 0.623592 ( -0.203087 0.219386 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.95246e-08 ( -1.58256e-08 1.65057e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.972 sec. to 1.972 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.24313 ( -2.14946 1.37226 )
Epeak [keV] : 88.3461 ( )
Norm@50keV : 2.25598E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.34 using 55 PHA bins.
# Reduced chi-squared = 1.276 for 52 degrees of freedom
# Null hypothesis probability = 8.718906e-02
Photon flux (15-150 keV) in 1 sec: 0.625820 ( -0.204051 0.19858 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.92279e-08 ( -1.55415e-08 1.58663e-08 ) ergs/cm2
Band function
Time interval is from 0.972 sec. to 1.972 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.07932 ( 1.07936 1.07936 )
beta : -1.39749 ( 1.39771 0.75168 )
Epeak [keV] : 49.8844 ( -49.9032 -49.9032 )
Norm@50keV : 9.88212E-03 ( -0.00625739 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.89 using 55 PHA bins.
# Reduced chi-squared = 1.312 for 51 degrees of freedom
# Null hypothesis probability = 6.695165e-02
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] : 15.1954 (-5.08944 10.7049)
R^2/D10^2 : 6.30958E-02 (-0.0627662 0.189451)
(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 3.044e-09 1.891e-09
25- 50 1.224e-08 7.480e-09
50-150 1.934e-08 1.309e-08
15-150 3.462e-08 2.214e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.358 (-108.955 -199.362)
Norm : 2.30099 (-0.664711 0.666041)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.730e-09 3.544e-09
25- 50 1.102e-08 6.680e-09
50-150 2.417e-08 1.476e-08
15-150 4.092e-08 2.506e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.87106 (-3.33504 4.26941)
R1^2/D10^2 : 0.221217 (-0.173683 0.741327)
kT2 [keV] : 199.363 (-199.363 -199.363)
R2^2/D10^2 : 1.15407E-04 (-6.28154e-05 0.00508037)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.518e-09 2.825e-09
25- 50 1.192e-08 6.755e-09
50-150 3.592e-08 1.193e-08
15-150 5.236e-08 2.042e-08
Plot creation:
Sun Jul 25 17:58:49 EDT 2021