batgrbproduct analysis for trigger=1061687
batgrbproduct Analysis for Trigger=1061687
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 Jul 27 18:22:32 EDT 2021
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1061687/GCN5_download_cron
======================================================================
Trigger: 01061687 Segment: 000
BAT Trigger Time: 649019971.136 [s; MET]
Trigger Stop: 649019971.648 [s; MET]
UTC: 2021-07-26T19:19:03.697060 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 193.341818919826 Dec: 19.1846373567284 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6.71
Image Trigger?: NO
Rate S/N Ratio: 13.4536240470737 [ if not an image trigger ]
Image S/N Ratio: 6.71
Flight Position: [ source = BAT ]
RA: 193.341818919826 Dec: 19.1846373567284 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 193.332914263174 Dec: 19.2108045545757 [deg; J2000]
{ 12h 53m 19.9s , +19d 12' 38.9" }
+/- 2.55032723911416 [arcmin] (estimated 90% radius based on SNR)
+/- 1.53762910075001 [arcmin] (formal 1-sigma fit error)
SNR: 7.98485585909023
Angular difference between Flight and Ground position is 1.649118 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 0.387999892234802 +/- 0.114402849786143
Measured from: 0.0120000839233398
to: 0.399999976158142 [s; relative to TRIGTIME]
T50: 0.184000015258789 +/- 0.079999995231632
Measured from: 0.136000037193298
to: 0.320000052452087 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.287999987602234
to: 0.712000012397766 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.00400006771087646
to: 0.423999905586243 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.016356 0.029613 0.024374 0.004293
0.005099 0.005614 0.005054 0.003859 [error]
Peak 0.021708 0.032555 0.020015 0.006484
0.007357 0.008071 0.007153 0.005736 [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 6.36e-09 1.14e-08 1.56e-08 4.46e-08 4.51e-08 7.80e-08 erg/cm2
Error 3.04e-09 3.03e-09 4.57e-09 3.13e-08 1.09e-08 3.35e-08 erg/cm2
Peak flux Power-law 3.34e-01 2.50e-01 1.24e-01 8.82e-02 7.49e-01 7.96e-01 ph/cm2/s
Error 2.15e-01 7.97e-02 6.16e-02 1.12e-01 2.58e-01 2.48e-01 ph/cm2/s
Fluence Cutoff-PL 5.72e-09 1.15e-08 1.62e-08 2.90e-08 4.41e-08 6.24e-08 erg/cm2
Error 3.69e-09 3.18e-09 5.29e-09 3.08e-08 1.21e-08 4.06e-08 erg/cm2
Peak flux Cutoff-PL 3.51e-01 2.51e-01 1.21e-01 7.97e-02 7.58e-01 8.04e-01 ph/cm2/s
Error 2.25e-01 7.95e-02 6.20e-02 1.12e-01 2.64e-01 2.75e-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 1.542 0.473 - - 1.12e-02 2.56e-03 57.120 53
CPL 1.168 1.867 128.0 0.0 1.62e-02 8.90e-02 57.020 52
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.007 0.797 - - 4.98e-03 1.77e-03 46.400 53
CPL 2.419 2.097 156.1 0.0 3.36e-03 0.00e+00 46.230 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 0.428 -0.004 0.424
T90 0.388 0.012 0.400
T50 0.184 0.136 0.320
Peak 1.000 -0.288 0.712
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
193.3329 +19.2108 0.0238 2.1 -13.5 0.0777 8.0 TRIG_01061687
------------------------------------------
Foreground time interval of the image:
-0.004 0.424 (delta_t = 0.428 [sec])
Background time interval of the image:
-27.035 -0.004 (delta_t = 27.031 [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 -0.004 sec. to 0.424 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.54216 ( -0.455444 0.490019 )
Norm@50keV : 1.11890E-02 ( -0.00256276 0.00255966 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.12 using 55 PHA bins.
# Reduced chi-squared = 1.078 for 53 degrees of freedom
# Null hypothesis probability = 3.246399e-01
Photon flux (15-150 keV) in 0.428 sec: 1.41326 ( -0.354411 0.370288 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.51343e-08 ( -1.08442e-08 1.10228e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.004 sec. to 0.424 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.16833 ( -2.42941 1.30415 )
Epeak [keV] : 128.029 ( -128.02 -128.02 )
Norm@50keV : 1.62363E-02 ( -0.0162372 0.161835 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.02 using 55 PHA bins.
# Reduced chi-squared = 1.096 for 52 degrees of freedom
# Null hypothesis probability = 2.939723e-01
Photon flux (15-150 keV) in 0.428 sec: 1.36480 ( -0.399464 0.41618 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.40823e-08 ( -1.23708e-08 1.18308e-08 ) ergs/cm2
Band function
Time interval is from -0.004 sec. to 0.424 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.96941 ( -4.96941 -4.96941 )
beta : -1.64721 ( -0.686879 0.509181 )
Epeak [keV] : 33.0550 ( -33.055 47.2676 )
Norm@50keV : 188.617 ( -42.8692 1.05776e+07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.61 using 55 PHA bins.
# Reduced chi-squared = 1.110 for 51 degrees of freedom
# Null hypothesis probability = 2.736659e-01
Photon flux (15-150 keV) in 0.428 sec: 1.38288 ( ) 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] : 17.3050 (-4.45784 6.02934)
R^2/D10^2 : 9.33305E-02 (-0.0600105 0.168522)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.11 using 55 PHA bins.
# Reduced chi-squared = 1.134 for 53 degrees of freedom
# Null hypothesis probability = 2.338293e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.424e-09 1.182e-09
25- 50 1.088e-08 5.286e-09
50-150 2.339e-08 1.226e-08
15-150 3.669e-08 1.838e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-106.084 -199.363)
Norm : 5.52516 (-1.15314 1.15314)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.888e-09 3.514e-09
25- 50 1.133e-08 6.623e-09
50-150 2.484e-08 1.461e-08
15-150 4.206e-08 2.478e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.22970 (-3.66625 5.04466)
R1^2/D10^2 : 1.92063 (-1.62991 87.3647)
kT2 [keV] : 24.0008 (-8.17313 41.0055)
R2^2/D10^2 : 2.53623E-02 (-0.0230033 0.0542544)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.575e-09 3.293e-09
25- 50 1.099e-08 5.870e-09
50-150 2.696e-08 1.609e-08
15-150 4.352e-08 2.279e-08
Peak spectrum fit
Power-law model
Time interval is from -0.288 sec. to 0.712 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.00731 ( -0.698707 0.894556 )
Norm@50keV : 4.97958E-03 ( -0.00187274 0.00166703 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.40 using 55 PHA bins.
# Reduced chi-squared = 0.8755 for 53 degrees of freedom
# Null hypothesis probability = 7.271180e-01
Photon flux (15-150 keV) in 1 sec: 0.749471 ( -0.245001 0.270644 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.59382e-08 ( -1.45589e-08 1.53787e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.288 sec. to 0.712 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.41879 ( -2.91718 1.27733 )
Epeak [keV] : 156.096 ( )
Norm@50keV : 3.36343E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.23 using 55 PHA bins.
# Reduced chi-squared = 0.8890 for 52 degrees of freedom
# Null hypothesis probability = 6.992152e-01
Photon flux (15-150 keV) in 1 sec: 0.758326 ( -0.271445 0.256314 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.5885e-08 ( -8.3242e-09 1.4746e-08 ) ergs/cm2
Band function
Time interval is from -0.288 sec. to 0.712 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.50781 ( 1.51172 1.51172 )
beta : -2.00259 ( 2.00625 0.69893 )
Epeak [keV] : 21.9705 ( -20.8697 -20.8697 )
Norm@50keV : 1.22342E-02 ( -0.0126761 1.99519e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.40 using 55 PHA bins.
# Reduced chi-squared = 0.9098 for 51 degrees of freedom
# Null hypothesis probability = 6.565860e-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] : 10.8693 (-3.42726 5.4432)
R^2/D10^2 : 0.222791 (-0.221197 0.648382)
(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 5.486e-09 3.413e-09
25- 50 1.527e-08 9.135e-09
50-150 1.010e-08 6.958e-09
15-150 3.086e-08 1.829e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 145.004 (-95.6499 -141.351)
Norm : 2.62609 (-0.758459 1.19422)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.763e-09 3.999e-09
25- 50 1.247e-08 7.415e-09
50-150 2.428e-08 1.571e-08
15-150 4.351e-08 2.628e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.66970 (-4.52559 5.41786)
R1^2/D10^2 : 0.925325 (-0.72602 27.7847)
kT2 [keV] : 24.8581 (-25.4 -28.0626)
R2^2/D10^2 : 7.42550E-03 (-0.00516671 0.152676)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.071e-09 4.386e-09
25- 50 1.233e-08 7.095e-09
50-150 2.182e-08 1.461e-08
15-150 4.122e-08 2.243e-08
Plot creation:
Tue Jul 27 18:29:00 EDT 2021