batgrbproduct analysis for trigger=1032183
batgrbproduct Analysis for Trigger=1032183
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): Fri Feb 12 19:46:54 EST 2021
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1032183/GCN5_download_cron
======================================================================
Trigger: 01032183 Segment: 000
BAT Trigger Time: 634796744.512 [s; MET]
Trigger Stop: 634796760.896 [s; MET]
UTC: 2021-02-12T04:25:18.019800 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 72.2609556926666 Dec: 7.23375771191397 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.13
Image Trigger?: NO
Rate S/N Ratio: 10.770329614269 [ if not an image trigger ]
Image S/N Ratio: 7.13
Flight Position: [ source = BAT ]
RA: 72.2609556926666 Dec: 7.23375771191397 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 72.2487571051573 Dec: 7.21460381502216 [deg; J2000]
{ 04h 48m 59.7s , +07d 12' 52.6" }
+/- 1.8980644222447 [arcmin] (estimated 90% radius based on SNR)
+/- 0.752142863545433 [arcmin] (formal 1-sigma fit error)
SNR: 12.1767477765776
Angular difference between Flight and Ground position is 1.359399 arcmin
Partial Coding Fraction: 1.03125 [ including projection effects ]
Duration
T90: 80 +/- 35.7770876399966
Measured from: -15.5119998455048
to: 64.4880001544952 [s; relative to TRIGTIME]
T50: 32 +/- 22.6274169979695
Measured from: 0.488000154495239
to: 32.4880001544952 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 7.98800003528595
to: 8.98800003528595 [s; relative to TRIGTIME]
Total Fluence
Measured from: -15.5119999647141
to: 80.4880000352859 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.542545 0.607539 0.286783 0.107819
0.062122 0.063849 0.055635 0.048464 [error]
Peak 0.021679 0.021738 0.017535 -0.001482
0.006582 0.006738 0.005773 0.004689 [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 1.54e-07 2.28e-07 2.54e-07 5.32e-07 7.97e-07 1.17e-06 erg/cm2
Error 2.67e-08 2.75e-08 5.28e-08 2.22e-07 1.21e-07 2.77e-07 erg/cm2
Peak flux Power-law 1.83e-01 1.69e-01 1.08e-01 1.06e-01 5.04e-01 5.67e-01 ph/cm2/s
Error 7.88e-02 4.94e-02 4.50e-02 8.77e-02 1.46e-01 1.71e-01 ph/cm2/s
Fluence Cutoff-PL 1.54e-07 2.29e-07 2.54e-07 5.26e-07 7.97e-07 1.16e-06 erg/cm2
Error 2.04e-08 2.82e-08 5.28e-08 4.03e-07 1.71e-07 4.46e-07 erg/cm2
Peak flux Cutoff-PL 1.66e-01 1.86e-01 1.11e-01 4.16e-02 4.93e-01 5.05e-01 ph/cm2/s
Error 1.29e-01 6.41e-02 5.17e-02 1.01e-01 1.49e-01 1.87e-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 1.848 0.231 - - 9.03e-04 1.35e-04 82.150 57
CPL 1.832 0.941 414.9 -0.0 9.23e-04 1.58e-03 82.150 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.646 0.511 - - 3.87e-03 1.27e-03 45.010 57
CPL 0.838 2.149 65.0 -6.5 1.08e-02 1.87e-01 44.540 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 96.000 -15.512 80.488
T90 80.000 -15.512 64.488
T50 32.000 0.488 32.488
Peak 1.000 7.988 8.988
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
72.2488 +7.2146 0.0158 5.3 -65.1 1.4942 12.2 TRIG_01032183
------------------------------------------
Foreground time interval of the image:
-15.512 67.189 (delta_t = 82.701 [sec])
Background time interval of the image:
-239.512 -15.512 (delta_t = 224.000 [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 -15.512 sec. to 80.488 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.84829 ( -0.224422 0.23667 )
Norm@50keV : 9.02851E-04 ( -0.000137424 0.000133516 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 82.15 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.63e-02 with 57 degrees of freedom
Photon flux (15-150 keV) in 96 sec: 0.126817 ( -0.0151911 0.0151913 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.96971e-07 ( -1.19163e-07 1.22589e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -15.512 sec. to 80.488 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.83194 ( -1.03626 0.84632 )
Epeak [keV] : 414.875 ( -499.419 -499.43 )
Norm@50keV : 9.23332E-04 ( -0.000292752 0.00285844 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 82.15 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.30e-02 with 56 degrees of freedom
Photon flux (15-150 keV) in 96 sec: 0.126776 ( -0.015184 0.015183 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.96627e-07 ( -2.19455e-07 1.22855e-07 ) ergs/cm2
Band function
Time interval is from -15.512 sec. to 80.488 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.710962 ( 1.14508 1.14508 )
beta : -1.96430 ( 1.95096 0.30448 )
Epeak [keV] : 32.5531 ( -32.7269 -32.7269 )
Norm@50keV : 5.63852E-03 ( -0.00582161 115.579 )
------------------------------------------------------------
Photon flux (15-150 keV) in 96 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] : 9.72658 (-1.31227 1.56066)
R^2/D10^2 : 6.54855E-02 (-0.0282268 0.0480024)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 96.26 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.91e-04 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.199e-07 2.568e-08
25- 50 2.865e-07 4.613e-08
50-150 1.379e-07 4.831e-08
15-150 5.444e-07 9.893e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 84.8109 (-30.8543 68.3624)
Norm : 0.583653 (-0.0981944 0.129586)
------------------------------------------------------------
#Fit statistic : Chi-Squared 83.00 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.39e-02 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.459e-07 2.544e-08
25- 50 2.434e-07 3.792e-08
50-150 3.571e-07 1.858e-07
15-150 7.464e-07 1.960e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.72635 (-1.80403 1.66589)
R1^2/D10^2 : 0.136243 (-0.0682654 0.197223)
kT2 [keV] : 53.3631 (-31.6777 -53.3537)
R2^2/D10^2 : 1.43513E-04 (-0.000128599 0.00204942)
------------------------------------------------------------
#Fit statistic : Chi-Squared 80.52 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.41e-02 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.415e-07 4.316e-08
25- 50 2.560e-07 8.338e-08
50-150 4.406e-07 2.336e-07
15-150 8.381e-07 3.149e-07
Peak spectrum fit
Power-law model
Time interval is from 7.988 sec. to 8.988 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.64574 ( -0.488537 0.533634 )
Norm@50keV : 3.86891E-03 ( -0.00129292 0.00123753 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 45.01 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.75e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 0.504477 ( -0.146248 0.146279 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.59974e-08 ( -1.22514e-08 1.28391e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 7.988 sec. to 8.988 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.838038 ( -2.90824 1.39031 )
Epeak [keV] : 65.0186 ( -52.0925 -65.0186 )
Norm@50keV : 1.07713E-02 ( -0.0107713 0.362945 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 44.54 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.65e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 0.492522 ( -0.149563 0.149305 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.35969e-08 ( -1.22886e-08 1.40498e-08 ) ergs/cm2
Band function
Time interval is from 7.988 sec. to 8.988 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.939999 ( 0.939624 0.939624 )
beta : -2.76045 ( 2.43945 7.14862 )
Epeak [keV] : 67.8921 ( -65.9412 -65.9412 )
Norm@50keV : 9.40069E-03 ( -0.0101754 1.18818e+06 )
------------------------------------------------------------
Photon flux (15-150 keV) in 1 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] : 13.2245 (-3.99926 5.55117)
R^2/D10^2 : 9.02278E-02 (-0.0901776 0.235099)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 46.44 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.40e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.345e-09 2.127e-09
25- 50 1.174e-08 7.330e-09
50-150 1.310e-08 9.320e-09
15-150 2.818e-08 1.803e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 148.540 (-97.0374 -144.401)
Norm : 2.10033 (-0.634877 1.00174)
------------------------------------------------------------
#Fit statistic : Chi-Squared 44.68 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.82e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.399e-09 3.246e-09
25- 50 9.993e-09 5.655e-09
50-150 1.965e-08 1.303e-08
15-150 3.504e-08 2.237e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.60390 (-4.52181 163.668)
R1^2/D10^2 : 2.16193 (-2.18182 -2.18182)
kT2 [keV] : 17.2999 (-6.0565 -17.1986)
R2^2/D10^2 : 2.90812E-02 (-0.0295108 0.134458)
------------------------------------------------------------
#Fit statistic : Chi-Squared 44.00 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.56e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.498e-09 3.163e-09
25- 50 9.892e-09 5.545e-09
50-150 1.705e-08 1.136e-08
15-150 3.244e-08 1.855e-08
Plot creation:
Fri Feb 12 19:51:43 EST 2021