batgrbproduct analysis for trigger=1035922
batgrbproduct Analysis for Trigger=1035922
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): Sat Mar 6 17:43:40 EST 2021
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1035922/GCN5_download_cron
======================================================================
Trigger: 01035922 Segment: 000
BAT Trigger Time: 636663811.072 [s; MET]
Trigger Stop: 636663812.096 [s; MET]
UTC: 2021-03-05T19:03:04.456060 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 319.813864066684 Dec: 34.5566320474194 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 14.41
Image Trigger?: NO
Rate S/N Ratio: 31.2089730686545 [ if not an image trigger ]
Image S/N Ratio: 14.41
Flight Position: [ source = BAT ]
RA: 319.813864066684 Dec: 34.5566320474194 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 319.808056038734 Dec: 34.5479969395691 [deg; J2000]
{ 21h 19m 13.9s , +34d 32' 52.8" }
+/- 0.733768216891562 [arcmin] (estimated 90% radius based on SNR)
+/- 0.219614239688538 [arcmin] (formal 1-sigma fit error)
SNR: 47.3344242992652
Angular difference between Flight and Ground position is 0.592293 arcmin
Partial Coding Fraction: 0.7421875 [ including projection effects ]
Duration
T90: 68.567999958992 +/- 4.43667670528361
Measured from: -14.067999958992
to: 54.5 [s; relative to TRIGTIME]
T50: 26.2159999608994 +/- 1.28891416334761
Measured from: -0.423999905586243
to: 25.7920000553131 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.259999990463257
to: 1.25999999046326 [s; relative to TRIGTIME]
Total Fluence
Measured from: -21.6480000019073
to: 71.7559999227524 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 2.770961 4.296776 3.312268 0.732620
0.076352 0.080735 0.071112 0.057203 [error]
Peak 0.074710 0.150067 0.145586 0.044727
0.009311 0.010874 0.010371 0.007302 [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 9.72e-07 1.80e-06 2.57e-06 7.73e-06 7.32e-06 1.31e-05 erg/cm2
Error 4.64e-08 5.04e-08 7.54e-08 5.12e-07 1.87e-07 5.54e-07 erg/cm2
Peak flux Power-law 8.15e-01 1.04e+00 9.66e-01 1.58e+00 3.35e+00 4.40e+00 ph/cm2/s
Error 1.17e-01 9.27e-02 8.04e-02 2.74e-01 2.57e-01 3.53e-01 ph/cm2/s
Fluence Cutoff-PL 8.53e-07 1.86e-06 2.68e-06 3.91e-06 7.06e-06 9.31e-06 erg/cm2
Error 5.85e-08 5.64e-08 8.65e-08 8.24e-07 2.07e-07 8.38e-07 erg/cm2
Peak flux Cutoff-PL 7.52e-01 1.07e+00 1.01e+00 1.08e+00 3.32e+00 3.91e+00 ph/cm2/s
Error 1.42e-01 1.05e-01 1.00e-01 4.60e-01 2.61e-01 5.82e-01 ph/cm2/s
Fluence Band 8.26e-07 1.88e-06 2.62e-06 5.76e-06 7.06e-06 1.11e-05 erg/cm2
Error -------- -------- 1.53e-07 -------- 2.07e-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 1.488 0.044 - - 8.25e-03 2.00e-04 71.710 57
CPL 0.929 0.192 104.1 19.7 1.49e-02 3.01e-03 43.930 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.104 0.124 - - 2.89e-02 2.16e-03 49.000 57
CPL 0.738 0.483 189.5 -53.4 4.30e-02 2.44e-02 47.370 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: 56.832000 sec.
T50 in the 50-300 keV band: 20.544000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 93.404 -21.648 71.756
T90 68.568 -14.068 54.500
T50 26.216 -0.424 25.792
Peak 1.000 0.260 1.260
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
319.8081 +34.5480 0.0041 25.1 -128.0 6.0033 47.3 TRIG_01035922
------------------------------------------
Foreground time interval of the image:
-21.648 11.429 (delta_t = 33.077 [sec])
Background time interval of the image:
-239.072 -110.142 (delta_t = 128.930 [sec])
-109.072 -107.942 (delta_t = 1.130 [sec])
-107.072 -21.648 (delta_t = 85.424 [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 -21.648 sec. to 71.756 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.48757 ( -0.0442699 0.0442369 )
Norm@50keV : 8.24670E-03 ( -0.000199933 0.000199931 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 71.71 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 9.08e-02 with 57 degrees of freedom
Photon flux (15-150 keV) in 93.4 sec: 1.02611 ( -0.0274088 0.0274734 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.32198e-06 ( -1.86411e-07 1.86626e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -21.648 sec. to 71.756 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.929497 ( -0.196703 0.188277 )
Epeak [keV] : 104.101 ( -13.9108 25.5262 )
Norm@50keV : 1.49396E-02 ( -0.00264761 0.00337698 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 43.93 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.79e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 93.4 sec: 0.987640 ( -0.029774 0.02988 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.06218e-06 ( -2.07208e-07 2.06619e-07 ) ergs/cm2
Band function
Time interval is from -21.648 sec. to 71.756 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.929396 ( -0.165975 0.176149 )
beta : -10.0000 ( 10 5.32907e-15 )
Epeak [keV] : 104.078 ( -8.62306 25.5358 )
Norm@50keV : 1.49400E-02 ( -0.00265004 0.00337434 )
------------------------------------------------------------
Photon flux (15-150 keV) in 93.4 sec: 0.988934 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 7.06154e-06 ( -7.06089e-06 -2.06489e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 16.6303 ( )
R^2/D10^2 : 7.99250E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 297.18 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 3.37e-34 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.229e-07 2.083e-08
25- 50 1.838e-06 6.304e-08
50-150 3.604e-06 1.541e-07
15-150 5.865e-06 1.639e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-7.82783 -200)
Norm : 4.23483 (-0.102535 0.102535)
------------------------------------------------------------
#Fit statistic : Chi-Squared 60.70 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 3.44e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.850e-07 2.709e-08
25- 50 1.895e-06 5.417e-08
50-150 4.156e-06 1.163e-07
15-150 7.035e-06 1.793e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.98882 (-0.803102 0.860454)
R1^2/D10^2 : 0.604113 (-0.163003 0.246558)
kT2 [keV] : 26.7284 (-2.34277 3.10675)
R2^2/D10^2 : 1.18197E-02 (-0.00401236 0.0050262)
------------------------------------------------------------
#Fit statistic : Chi-Squared 41.58 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 9.09e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.826e-07 6.893e-08
25- 50 1.910e-06 1.153e-07
50-150 4.348e-06 3.288e-07
15-150 7.040e-06 4.208e-07
Peak spectrum fit
Power-law model
Time interval is from 0.260 sec. to 1.260 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.10435 ( -0.125346 0.123639 )
Norm@50keV : 2.89052E-02 ( -0.00216067 0.00215899 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 49.00 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 7.66e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 3.35424 ( -0.256829 0.257053 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.01792e-07 ( -2.46418e-08 2.47297e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.260 sec. to 1.260 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.737726 ( -0.547074 0.419458 )
Epeak [keV] : 189.474 ( -82.6567 -189.476 )
Norm@50keV : 4.30311E-02 ( -0.0153653 0.0334194 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 47.37 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 7.87e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 3.32026 ( -0.26108 0.26106 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.96912e-07 ( -2.6194e-08 2.5903e-08 ) ergs/cm2
Band function
Time interval is from 0.260 sec. to 1.260 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99999 ( -4.86072e-06 -4.99999 )
beta : -1.23341 ( -0.15628 0.15137 )
Epeak [keV] : 31.0412 ( -8.93023 5.13018 )
Norm@50keV : 622.858 ( -46.2429 3851.43 )
------------------------------------------------------------
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] : 19.4866 (-1.87277 2.15681)
R^2/D10^2 : 0.175133 (-0.050834 0.0688036)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 76.38 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 4.42e-02 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.295e-08 1.845e-09
25- 50 6.339e-08 7.115e-09
50-150 1.777e-07 2.275e-08
15-150 2.541e-07 2.445e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-13.3587 -200)
Norm : 13.7154 (-1.05821 1.05821)
------------------------------------------------------------
#Fit statistic : Chi-Squared 81.83 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.72e-02 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.416e-08 3.185e-09
25- 50 6.571e-08 8.640e-09
50-150 1.441e-07 4.302e-08
15-150 2.440e-07 6.740e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 11.6015 (-3.29401 2.86816)
R1^2/D10^2 : 0.653141 (-0.339875 0.844195)
kT2 [keV] : 54.2486 (-24.2318 -54.6927)
R2^2/D10^2 : 5.62748E-03 (-0.0051054 0.0278225)
------------------------------------------------------------
#Fit statistic : Chi-Squared 45.52 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.15e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.022e-08 5.300e-09
25- 50 6.847e-08 1.964e-08
50-150 2.088e-07 9.849e-08
15-150 2.975e-07 1.152e-07
Plot creation:
Sat Mar 6 17:47:53 EST 2021