batgrbproduct analysis for trigger=1080859
batgrbproduct Analysis for Trigger=1080859
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 Oct 24 20:41:07 EDT 2021
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1080859/GCN5_download_cron
======================================================================
Trigger: 01080859 Segment: 000
BAT Trigger Time: 656715980.096 [s; MET]
Trigger Stop: 656715981.12 [s; MET]
UTC: 2021-10-23T21:05:52.141400 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 170.3019869197 Dec: 39.1371095016785 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.67
Image Trigger?: NO
Rate S/N Ratio: 12.4498995979887 [ if not an image trigger ]
Image S/N Ratio: 9.67
Flight Position: [ source = BAT ]
RA: 170.3019869197 Dec: 39.1371095016785 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 170.313644834466 Dec: 39.1329794169403 [deg; J2000]
{ 11h 21m 15.3s , +39d 07' 58.7" }
+/- 1.95925080620154 [arcmin] (estimated 90% radius based on SNR)
+/- 1.10248426391449 [arcmin] (formal 1-sigma fit error)
SNR: 11.6371572436683
Angular difference between Flight and Ground position is 0.596467 arcmin
Partial Coding Fraction: 0.4882812 [ including projection effects ]
Duration
T90: 1.2960000038147 +/- 0.264877401530976
Measured from: 0.064000129699707
to: 1.3600001335144 [s; relative to TRIGTIME]
T50: 0.659999847412109 +/- 0.189652270373547
Measured from: 0.372000217437744
to: 1.03200006484985 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.24400007724762
to: 1.24400007724762 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.0119999647140503
to: 1.45200002193451 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.094357 0.124454 0.061336 0.010485
0.013636 0.014562 0.012240 0.009329 [error]
Peak 0.069667 0.109780 0.049401 0.008688
0.011273 0.012261 0.010269 0.007664 [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 3.65e-08 5.06e-08 5.17e-08 9.65e-08 1.70e-07 2.35e-07 erg/cm2
Error 7.14e-09 7.00e-09 1.15e-08 4.21e-08 2.71e-08 5.48e-08 erg/cm2
Peak flux Power-law 9.31e-01 7.43e-01 3.99e-01 3.13e-01 2.21e+00 2.39e+00 ph/cm2/s
Error 1.91e-01 1.05e-01 8.21e-02 1.22e-01 3.14e-01 3.35e-01 ph/cm2/s
Fluence Cutoff-PL 3.54e-08 5.34e-08 5.18e-08 4.96e-08 1.65e-07 1.90e-07 erg/cm2
Error 7.67e-09 9.42e-09 1.27e-08 6.57e-08 2.96e-08 7.31e-08 erg/cm2
Peak flux Cutoff-PL 8.81e-01 7.99e-01 4.08e-01 1.57e-01 2.19e+00 2.24e+00 ph/cm2/s
Error 2.09e-01 1.44e-01 6.87e-02 2.22e-01 3.16e-01 3.73e-01 ph/cm2/s
Fluence Band 3.37e-08 5.72e-08 4.78e-08 6.67e-08 1.63e-07 2.06e-07 erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 8.89e-01 7.89e-01 4.08e-01 1.78e-01 2.20e+00 2.26e+00 ph/cm2/s
Error 2.07e-01 -------- -------- -------- -------- -------- ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.967 0.244 - - 1.26e-02 2.08e-03 40.000 57
CPL 1.573 0.882 47.0 0.0 2.11e-02 0.00e+00 39.420 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.895 0.238 - - 1.55e-02 2.48e-03 48.600 57
CPL 1.337 1.033 52.3 -1.3 3.20e-02 8.19e-02 47.550 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 1.464 -0.012 1.452
T90 1.296 0.064 1.360
T50 0.660 0.372 1.032
Peak 1.000 0.244 1.244
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
170.3136 +39.1330 0.0165 41.9 -162.5 0.2907 11.6 TRIG_01080859
------------------------------------------
Foreground time interval of the image:
-0.012 1.452 (delta_t = 1.464 [sec])
Background time interval of the image:
-239.096 -184.776 (delta_t = 54.320 [sec])
-184.096 -0.012 (delta_t = 184.084 [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 -0.012 sec. to 1.452 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.96731 ( -0.235915 0.25243 )
Norm@50keV : 1.25801E-02 ( -0.00210977 0.00205042 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.00 using 59 PHA bins.
# Reduced chi-squared = 0.7018 for 57 degrees of freedom
# Null hypothesis probability = 9.573837e-01
Photon flux (15-150 keV) in 1.464 sec: 1.85920 ( -0.259082 0.259209 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.69588e-07 ( -2.6942e-08 2.73411e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.012 sec. to 1.452 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.57311 ( -1.10947 0.655193 )
Epeak [keV] : 46.9737 ( )
Norm@50keV : 2.11334E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.42 using 59 PHA bins.
# Reduced chi-squared = 0.7039 for 56 degrees of freedom
# Null hypothesis probability = 9.545187e-01
Photon flux (15-150 keV) in 1.464 sec: 1.84284 ( -0.26159 0.2616 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.6465e-07 ( -2.96527e-08 2.95084e-08 ) ergs/cm2
Band function
Time interval is from -0.012 sec. to 1.452 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.69002 ( -1.8322 1.10569 )
beta : -9.37167 ( 9.37166 19.3717 )
Epeak [keV] : 48.4519 ( -26.2321 -48.45 )
Norm@50keV : 1.81447E-02 ( -0.00705842 0.0356572 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.47 using 59 PHA bins.
# Reduced chi-squared = 0.7175 for 55 degrees of freedom
# Null hypothesis probability = 9.434182e-01
Photon flux (15-150 keV) in 1.464 sec: 1.85006 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.63278e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.29796 (-1.50201 1.89237)
R^2/D10^2 : 1.15756 (-0.589947 1.13371)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.14 using 59 PHA bins.
# Reduced chi-squared = 0.8973 for 57 degrees of freedom
# Null hypothesis probability = 6.933611e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.898e-08 7.035e-09
25- 50 6.477e-08 1.361e-08
50-150 2.727e-08 1.088e-08
15-150 1.210e-07 2.437e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 72.1414 (-24.8449 48.0571)
Norm : 9.10809 (-1.83579 2.30623)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.431e-08 6.178e-09
25- 50 5.504e-08 8.418e-09
50-150 7.227e-08 2.858e-08
15-150 1.616e-07 3.560e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.70917 (-1.50212 1.66717)
R1^2/D10^2 : 3.27576 (-1.70168 4.26183)
kT2 [keV] : 26.9395 (-10.6107 34.056)
R2^2/D10^2 : 1.20297E-02 (-0.00960818 0.0503937)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.524e-08 2.006e-08
25- 50 5.425e-08 2.907e-08
50-150 7.243e-08 4.534e-08
15-150 1.619e-07 8.222e-08
Peak spectrum fit
Power-law model
Time interval is from 0.244 sec. to 1.244 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.89529 ( -0.230931 0.244889 )
Norm@50keV : 1.54599E-02 ( -0.00251328 0.00245438 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.60 using 59 PHA bins.
# Reduced chi-squared = 0.8526 for 57 degrees of freedom
# Null hypothesis probability = 7.781747e-01
Photon flux (15-150 keV) in 1 sec: 2.21424 ( -0.313849 0.314059 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.42128e-07 ( -2.25351e-08 2.28091e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.244 sec. to 1.244 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.33661 ( -1.21833 0.846828 )
Epeak [keV] : 52.3468 ( -49.7742 -52.3483 )
Norm@50keV : 3.20029E-02 ( -0.0320006 0.131744 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.55 using 59 PHA bins.
# Reduced chi-squared = 0.8491 for 56 degrees of freedom
# Null hypothesis probability = 7.819584e-01
Photon flux (15-150 keV) in 1 sec: 2.19035 ( -0.31605 0.31659 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.36778e-07 ( -2.4874e-08 2.4642e-08 ) ergs/cm2
Band function
Time interval is from 0.244 sec. to 1.244 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.33725 ( -5.28981 0.997944 )
beta : -10.0000 ( 10 1.77636e-15 )
Epeak [keV] : 52.3420 ( -18.7189 -52.342 )
Norm@50keV : 3.19738E-02 ( -0.0148605 0.131817 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.55 using 59 PHA bins.
# Reduced chi-squared = 0.8645 for 55 degrees of freedom
# Null hypothesis probability = 7.520621e-01
Photon flux (15-150 keV) in 1 sec: 2.19660 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.35935e-07 ( 0 0 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.0341 (-1.58722 1.93247)
R^2/D10^2 : 1.05785 (-0.517567 0.977589)
(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 2.172e-08 5.505e-09
25- 50 5.425e-08 1.005e-08
50-150 2.859e-08 9.595e-09
15-150 1.046e-07 2.188e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 81.7319 (-28.7167 58.5416)
Norm : 10.4577 (-1.91264 2.58307)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.717e-08 5.310e-09
25- 50 4.496e-08 7.480e-09
50-150 6.438e-08 3.085e-08
15-150 1.365e-07 3.325e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.36749 (-1.66708 1.83678)
R1^2/D10^2 : 2.76639 (-1.41827 2.26973)
kT2 [keV] : 29.6446 (-13.1278 72.3623)
R2^2/D10^2 : 1.02786E-02 (-0.00825363 0.0551228)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.678e-08 1.476e-08
25- 50 4.701e-08 2.531e-08
50-150 6.210e-08 3.772e-08
15-150 1.359e-07 7.023e-08
Plot creation:
Sun Oct 24 20:47:44 EDT 2021