batgrbproduct analysis for trigger=1033328
batgrbproduct Analysis for Trigger=1033328
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): Thu Feb 18 17:05:32 EST 2021
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1033328/GCN5_download_cron
======================================================================
Trigger: 01033328 Segment: 000
BAT Trigger Time: 635348146.176 [s; MET]
Trigger Stop: 635348147.2 [s; MET]
UTC: 2021-02-18T13:35:19.647240 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 47.2910601557218 Dec: 35.287132551004 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.16
Image Trigger?: NO
Rate S/N Ratio: 7.07106781186548 [ if not an image trigger ]
Image S/N Ratio: 7.16
Flight Position: [ source = BAT ]
RA: 47.2910601557218 Dec: 35.287132551004 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 47.3180655996409 Dec: 35.3219235010002 [deg; J2000]
{ 03h 09m 16.3s , +35d 19' 18.9" }
+/- 1.41381631634117 [arcmin] (estimated 90% radius based on SNR)
+/- 0.53292974898324 [arcmin] (formal 1-sigma fit error)
SNR: 18.5468966653705
Angular difference between Flight and Ground position is 2.471042 arcmin
Partial Coding Fraction: 0.578125 [ including projection effects ]
Duration
T90: 239.243999958038 +/- 29.6216032517148
Measured from: -4.16799986362457
to: 235.076000094414 [s; relative to TRIGTIME]
T50: 103.924000024796 +/- 19.1323442118823
Measured from: 15.2080000638962
to: 119.132000088692 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.0920000076293945
to: 1.09200000762939 [s; relative to TRIGTIME]
Total Fluence
Measured from: -14.2680000066757
to: 266.256000041962 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.644971 2.572222 1.987881 0.374117
0.146583 0.150750 0.129754 0.108518 [error]
Peak 0.020428 0.056887 0.042557 0.017822
0.008932 0.009874 0.008661 0.006927 [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 5.75e-07 1.08e-06 1.57e-06 4.85e-06 4.45e-06 8.08e-06 erg/cm2
Error 6.64e-08 7.67e-08 1.27e-07 8.42e-07 3.14e-07 9.32e-07 erg/cm2
Peak flux Power-law 2.58e-01 3.24e-01 2.96e-01 4.72e-01 1.04e+00 1.35e+00 ph/cm2/s
Error 1.16e-01 8.95e-02 6.76e-02 2.39e-01 2.37e-01 2.96e-01 ph/cm2/s
Fluence Cutoff-PL 5.06e-07 1.15e-06 1.65e-06 1.99e-06 4.26e-06 5.30e-06 erg/cm2
Error 7.95e-08 9.34e-08 1.44e-07 1.16e-06 3.42e-07 1.18e-06 erg/cm2
Peak flux Cutoff-PL 2.62e-01 3.26e-01 2.95e-01 4.61e-01 1.04e+00 1.35e+00 ph/cm2/s
Error 8.77e-02 6.79e-02 7.15e-02 -------- 2.36e-01 3.52e-01 ph/cm2/s
Fluence Band 4.83e-07 1.19e-06 1.57e-06 3.60e-06 4.30e-06 6.86e-06 erg/cm2
Error 8.82e-08 -------- -------- -------- -------- -------- 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 1.462 0.110 - - 1.66e-03 1.09e-04 57.430 57
CPL 0.769 0.490 91.3 48.2 3.65e-03 2.13e-03 50.530 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.129 0.387 - - 8.93e-03 1.94e-03 53.530 57
CPL 2.462 -0.014 147.9 0.0 1.06e-03 0.00e+00 53.270 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: 120.640000 sec.
T50 in the 50-300 keV band: 70.400000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 280.524 -14.268 266.256
T90 239.244 -4.168 235.076
T50 103.924 15.208 119.132
Peak 1.000 0.092 1.092
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
47.3181 +35.3219 0.0103 36.2 -25.1 5.3704 18.5 TRIG_01033328
------------------------------------------
Foreground time interval of the image:
-14.268 164.725 (delta_t = 178.993 [sec])
Background time interval of the image:
-239.176 -35.116 (delta_t = 204.060 [sec])
-34.176 -14.268 (delta_t = 19.908 [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 -14.268 sec. to 266.256 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.46204 ( -0.110422 0.110259 )
Norm@50keV : 1.66292E-03 ( -0.000108996 0.000108911 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 57.43 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 4.59e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 280.5 sec: 0.205551 ( -0.0140007 0.0140302 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.45384e-06 ( -3.13571e-07 3.1483e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -14.268 sec. to 266.256 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.769195 ( -0.518284 0.461992 )
Epeak [keV] : 91.2968 ( -19.7313 76.6859 )
Norm@50keV : 3.65030E-03 ( -0.00146007 0.00280894 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 50.53 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 6.81e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 280.5 sec: 0.199292 ( -0.014614 0.014621 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.26166e-06 ( -3.41845e-07 3.4193e-07 ) ergs/cm2
Band function
Time interval is from -14.268 sec. to 266.256 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.133655 ( -1.09803 0.114178 )
beta : -1.75971 ( 1.75762 0.24086 )
Epeak [keV] : 58.1392 ( -26.8834 87.1193 )
Norm@50keV : 9.21658E-03 ( -0.00987142 1.3143 )
------------------------------------------------------------
Photon flux (15-150 keV) in 280.5 sec: 0.199262 ( 6.80074 -0.014741 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.30161e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 15.7950 (-1.21884 1.34584)
R^2/D10^2 : 1.98592E-02 (-0.00501685 0.00657695)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 85.44 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.73e-03 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.882e-07 3.429e-08
25- 50 1.199e-06 1.032e-07
50-150 2.081e-06 2.575e-07
15-150 3.568e-06 2.763e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-33.6147 -200)
Norm : 0.851930 (-0.0553351 0.0553351)
------------------------------------------------------------
#Fit statistic : Chi-Squared 54.84 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 5.56e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.951e-07 4.586e-08
25- 50 1.145e-06 1.109e-07
50-150 2.511e-06 5.233e-07
15-150 4.250e-06 5.456e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.06266 (-1.9889 2.19598)
R1^2/D10^2 : 0.119258 (-0.0591478 0.168246)
kT2 [keV] : 25.9246 (-5.18577 10.9995)
R2^2/D10^2 : 2.63062E-03 (-0.00190803 0.00385487)
------------------------------------------------------------
#Fit statistic : Chi-Squared 49.97 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 6.67e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.800e-07 1.599e-07
25- 50 1.190e-06 3.038e-07
50-150 2.607e-06 1.208e-06
15-150 4.276e-06 1.532e-06
Peak spectrum fit
Power-law model
Time interval is from 0.092 sec. to 1.092 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.12917 ( -0.404627 0.369735 )
Norm@50keV : 8.93121E-03 ( -0.00194891 0.00192347 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 53.53 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 6.06e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 1.03911 ( -0.236287 0.237772 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.25264e-08 ( -2.06026e-08 2.07451e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.092 sec. to 1.092 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.46201 ( -2.43402 -2.4619 )
Epeak [keV] : 147.861 ( )
Norm@50keV : 1.06227E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared 53.27 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 5.79e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 1.04244 ( -0.240019 0.23286 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.22653e-08 ( -2.03478e-08 2.08537e-08 ) ergs/cm2
Band function
Time interval is from 0.092 sec. to 1.092 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.94881 ( -4.94881 -4.94881 )
beta : -1.34552 ( -0.640363 0.49723 )
Epeak [keV] : 33.5049 ( -33.5049 39.1512 )
Norm@50keV : 121.614 ( -25.4932 2.90212e+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] : 21.7933 (-7.11127 11.6873)
R^2/D10^2 : 3.56306E-02 (-0.0259164 0.0958311)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 61.48 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 3.19e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.145e-09 1.649e-09
25- 50 1.654e-08 7.996e-09
50-150 5.867e-08 2.734e-08
15-150 7.836e-08 3.754e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-70.36 -200)
Norm : 4.40867 (-0.964913 0.964913)
------------------------------------------------------------
#Fit statistic : Chi-Squared 57.44 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 4.59e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.099e-08 6.575e-09
25- 50 2.113e-08 1.249e-08
50-150 4.635e-08 2.717e-08
15-150 7.846e-08 4.562e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.95342 (-2.87584 4.00697)
R1^2/D10^2 : 0.515593 (-0.377993 1.35524)
kT2 [keV] : 60.7148 (-46.086 137.891)
R2^2/D10^2 : 1.59992E-03 (-0.0014575 0.0117499)
------------------------------------------------------------
#Fit statistic : Chi-Squared 50.94 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 6.30e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.577e-09 5.285e-09
25- 50 2.107e-08 1.212e-08
50-150 6.646e-08 3.707e-08
15-150 9.611e-08 4.570e-08
Plot creation:
Thu Feb 18 17:09:46 EST 2021