batgrbproduct analysis for trigger=1061511
batgrbproduct Analysis for Trigger=1061511
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 18:02:16 EDT 2021
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1061511/GCN5_download_cron
======================================================================
Trigger: 01061511 Segment: 000
BAT Trigger Time: 648877650.368 [s; MET]
Trigger Stop: 648877655.872 [s; MET]
UTC: 2021-07-25T03:47:02.938560 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 215.362562229834 Dec: -1.17692971172635 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.32
Image Trigger?: NO
Rate S/N Ratio: 23.7907545067406 [ if not an image trigger ]
Image S/N Ratio: 8.32
Flight Position: [ source = BAT ]
RA: 215.362562229834 Dec: -1.17692971172635 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 215.368866271975 Dec: -1.17713246286995 [deg; J2000]
{ 14h 21m 28.5s , -01d 10' 37.7" }
+/- 2.32599964833193 [arcmin] (estimated 90% radius based on SNR)
+/- 0.863330779631619 [arcmin] (formal 1-sigma fit error)
SNR: 9.10731412036051
Angular difference between Flight and Ground position is 0.378358 arcmin
Partial Coding Fraction: 0.9296875 [ including projection effects ]
Duration
T90: 54.432000041008 +/- 12.3008943361309
Measured from: 0.584000110626221
to: 55.0160001516342 [s; relative to TRIGTIME]
T50: 34.9120000600815 +/- 10.4532912136259
Measured from: 3.20800006389618
to: 38.1200001239777 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.715999960899353
to: 1.71599996089935 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.120000004768372
to: 60.6319999694824 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.339380 0.392660 0.383103 0.090390
0.059044 0.057084 0.050495 0.045264 [error]
Peak 0.024515 0.037136 0.033244 0.024319
0.007811 0.007968 0.007677 0.006795 [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 9.43e-08 1.82e-07 2.71e-07 8.70e-07 7.63e-07 1.42e-06 erg/cm2
Error 3.29e-08 3.34e-08 5.07e-08 4.23e-07 1.20e-07 4.38e-07 erg/cm2
Peak flux Power-law 2.45e-01 2.85e-01 2.38e-01 3.36e-01 8.89e-01 1.10e+00 ph/cm2/s
Error 1.35e-01 8.44e-02 6.22e-02 2.24e-01 2.16e-01 2.50e-01 ph/cm2/s
Fluence Cutoff-PL 9.43e-08 1.82e-07 2.71e-07 8.63e-07 7.63e-07 1.41e-06 erg/cm2
Error 3.75e-08 3.34e-08 5.30e-08 5.70e-07 1.24e-07 7.41e-07 erg/cm2
Peak flux Cutoff-PL 2.51e-01 2.88e-01 2.37e-01 3.24e-01 8.93e-01 1.10e+00 ph/cm2/s
Error 1.43e-01 8.45e-02 6.39e-02 3.28e-01 2.18e-01 3.04e-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 1.424 0.334 - - 1.35e-03 1.97e-04 61.370 53
CPL 5.819 0.000 668.7 0.0 4.62e-05 0.00e+00 60.850 52
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.257 0.510 - - 7.51e-03 1.65e-03 55.190 53
CPL 1.254 1.005 9999.1 0.0 7.54e-03 1.18e-02 55.190 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: 9.728000 sec.
T50 in the 50-300 keV band: 5.376000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 60.512 0.120 60.632
T90 54.432 0.584 55.016
T50 34.912 3.208 38.120
Peak 1.000 0.716 1.716
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
215.3689 -1.1771 0.0212 13.0 -75.9 1.0353 9.1 TRIG_01061511
------------------------------------------
Foreground time interval of the image:
0.120 10.022 (delta_t = 9.902 [sec])
11.632 54.733 (delta_t = 43.101 [sec])
Background time interval of the image:
-239.368 0.120 (delta_t = 239.488 [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
0.120000 10.022000
11.632000 60.632000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.42379 ( -0.327732 0.341133 )
Norm@50keV : 1.34751E-03 ( -0.000196577 0.000196457 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.37 using 55 PHA bins.
# Reduced chi-squared = 1.158 for 53 degrees of freedom
# Null hypothesis probability = 2.011945e-01
Photon flux (15-150 keV) in 58.9 sec: 0.165009 ( -0.0271278 0.0282779 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.63256e-07 ( -1.19083e-07 1.21028e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
0.120000 10.022000
11.632000 60.632000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 5.81904 ( )
Epeak [keV] : 668.747 ( )
Norm@50keV : 4.61731E-05 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.85 using 55 PHA bins.
# Reduced chi-squared = 1.170 for 52 degrees of freedom
# Null hypothesis probability = 1.874650e-01
Photon flux (15-150 keV) in 58.9 sec: 0.164858 ( -0.031345 0.026998 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.63167e-07 ( -1.28102e-07 1.19426e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
0.120000 10.022000
11.632000 60.632000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.08793 ( 1.0884 1.0884 )
beta : -1.42348 ( 1.42377 0.327903 )
Epeak [keV] : 51.7103 ( -51.5752 -51.5752 )
Norm@50keV : 2.60667E-03 ( -0.00123358 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.37 using 55 PHA bins.
# Reduced chi-squared = 1.203 for 51 degrees of freedom
# Null hypothesis probability = 1.517181e-01
Photon flux (15-150 keV) in 58.9 sec: 0.164979 ( 6.83502 -0.01583 ) 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] : 19.8593 (-3.63416 4.65156)
R^2/D10^2 : 6.89956E-03 (-0.00342113 0.00662795)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.19 using 55 PHA bins.
# Reduced chi-squared = 1.324 for 53 degrees of freedom
# Null hypothesis probability = 5.704271e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.098e-08 1.068e-08
25- 50 1.536e-07 3.731e-08
50-150 4.487e-07 1.390e-07
15-150 6.332e-07 1.650e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-60.8383 -200)
Norm : 0.648966 (-0.090663 0.090663)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.519e-08 5.419e-08
25- 50 1.831e-07 1.017e-07
50-150 4.016e-07 2.217e-07
15-150 6.799e-07 3.767e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.36242 (-1.9211 2.28513)
R1^2/D10^2 : 0.388827 (-0.306878 2.36355)
kT2 [keV] : 25.8475 (-5.99088 11.443)
R2^2/D10^2 : 2.62470E-03 (-0.00181305 0.00278675)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.072e-08 5.010e-08
25- 50 1.582e-07 6.290e-08
50-150 5.041e-07 2.762e-07
15-150 7.529e-07 3.675e-07
Peak spectrum fit
Power-law model
Time interval is from 0.716 sec. to 1.716 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.25739 ( -0.500246 0.518816 )
Norm@50keV : 7.50901E-03 ( -0.00164997 0.00164359 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.19 using 55 PHA bins.
# Reduced chi-squared = 1.041 for 53 degrees of freedom
# Null hypothesis probability = 3.918771e-01
Photon flux (15-150 keV) in 1 sec: 0.889235 ( -0.211107 0.220554 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.50039e-08 ( -1.78233e-08 1.83133e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.716 sec. to 1.716 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.25392 ( -1.48819 0.521729 )
Epeak [keV] : 9999.15 ( -9999.23 -9999.23 )
Norm@50keV : 7.54127E-03 ( -0.00164286 0.0219386 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.19 using 55 PHA bins.
# Reduced chi-squared = 1.061 for 52 degrees of freedom
# Null hypothesis probability = 3.548753e-01
Photon flux (15-150 keV) in 1 sec: 0.893427 ( -0.220375 0.215933 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.50882e-08 ( -1.8303e-08 1.78631e-08 ) ergs/cm2
Band function
Time interval is from 0.716 sec. to 1.716 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.947070 ( 0.947093 0.947093 )
beta : -1.25736 ( 1.25735 0.500846 )
Epeak [keV] : 64.7670 ( -64.7247 -64.7247 )
Norm@50keV : 1.38076E-02 ( -0.00793538 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.19 using 55 PHA bins.
# Reduced chi-squared = 1.082 for 51 degrees of freedom
# Null hypothesis probability = 3.193039e-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] : 20.5046 (-6.24637 9.86552)
R^2/D10^2 : 3.49630E-02 (-0.0240826 0.0764805)
(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 2.805e-09 1.382e-09
25- 50 1.420e-08 6.693e-09
50-150 4.440e-08 2.160e-08
15-150 6.141e-08 2.274e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-74.2964 -200)
Norm : 3.29290 (-0.741176 0.741176)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.203e-09 4.848e-09
25- 50 1.578e-08 9.410e-09
50-150 3.461e-08 2.025e-08
15-150 5.859e-08 3.521e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.12183 (-4.14354 6.71446)
R1^2/D10^2 : 0.303657 (-0.26186 0.617212)
kT2 [keV] : 42.3836 (-20.9675 -45.9154)
R2^2/D10^2 : 3.02743E-03 (-0.00232592 0.01282)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.626e-09 3.648e-09
25- 50 1.541e-08 9.205e-09
50-150 5.207e-08 2.985e-08
15-150 7.311e-08 3.962e-08
Plot creation:
Sun Jul 25 18:08:37 EDT 2021