batgrbproduct analysis for trigger=1032024
batgrbproduct Analysis for Trigger=1032024
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 11 09:15:27 EST 2021
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1032024/batgroup_hand_proc
======================================================================
Trigger: 01032024 Segment: 000
BAT Trigger Time: 634725824.832 [s; MET]
Trigger Stop: 634725825.344 [s; MET]
UTC: 2021-02-11T08:43:18.344500 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 269.432936029963 Dec: -46.2994226377339 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.09
Image Trigger?: NO
Rate S/N Ratio: 13.7477270848675 [ if not an image trigger ]
Image S/N Ratio: 7.09
Flight Position: [ source = BAT ]
RA: 269.432936029963 Dec: -46.2994226377339 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 269.408408771969 Dec: -46.2697354210834 [deg; J2000]
{ 17h 57m 38.0s , -46d 16' 11.0" }
+/- 1.44997439324512 [arcmin] (estimated 90% radius based on SNR)
+/- 0.641693450614146 [arcmin] (formal 1-sigma fit error)
SNR: 17.8897231242835
Angular difference between Flight and Ground position is 2.051123 arcmin
Partial Coding Fraction: 1 [ including projection effects ]
Duration
T90: 6.09599995613098 +/- 0.598815550288031
Measured from: -0.444000005722046
to: 5.65199995040894 [s; relative to TRIGTIME]
T50: 3.59599995613098 +/- 0.515193198710622
Measured from: 0.927999973297119
to: 4.5239999294281 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 4.27999997138977
to: 5.27999997138977 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.700000047683716
to: 5.89999997615814 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.124935 0.215182 0.208603 0.053057
0.018435 0.017857 0.015773 0.012948 [error]
Peak 0.030651 0.052803 0.040549 0.014592
0.007397 0.007430 0.006600 0.005320 [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 3.48e-08 8.24e-08 1.55e-07 7.09e-07 4.21e-07 9.81e-07 erg/cm2
Error 6.18e-09 8.58e-09 1.49e-08 1.60e-07 3.86e-08 1.67e-07 erg/cm2
Peak flux Power-law 2.85e-01 3.32e-01 2.79e-01 3.95e-01 1.04e+00 1.29e+00 ph/cm2/s
Error 8.47e-02 6.01e-02 5.19e-02 1.57e-01 1.67e-01 2.14e-01 ph/cm2/s
Fluence Cutoff-PL 3.39e-08 8.31e-08 1.57e-07 6.06e-07 4.18e-07 8.80e-07 erg/cm2
Error 7.49e-09 9.18e-09 1.69e-08 2.68e-07 4.09e-08 2.77e-07 erg/cm2
Peak flux Cutoff-PL 2.69e-01 3.40e-01 2.86e-01 2.84e-01 1.02e+00 1.18e+00 ph/cm2/s
Error 9.91e-02 6.85e-02 5.91e-02 2.42e-01 1.74e-01 2.93e-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 1.086 0.155 - - 6.07e-03 5.17e-04 50.960 57
CPL 0.973 0.405 503.5 0.0 6.83e-03 3.52e-03 50.850 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.253 0.278 - - 8.77e-03 1.38e-03 46.630 57
CPL 0.971 1.194 189.3 0.0 1.21e-02 2.12e-02 46.430 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: 6.272000 sec.
T50 in the 50-300 keV band: 3.520000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 6.600 -0.700 5.900
T90 6.096 -0.444 5.652
T50 3.596 0.928 4.524
Peak 1.000 4.280 5.280
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
269.4084 -46.2697 0.0108 14.6 -22.5 0.6165 17.9 TRIG_01032024
------------------------------------------
Foreground time interval of the image:
-0.700 5.900 (delta_t = 6.600 [sec])
Background time interval of the image:
-239.832 -0.700 (delta_t = 239.132 [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 -0.700 sec. to 5.900 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.08623 ( -0.156925 0.153385 )
Norm@50keV : 6.07219E-03 ( -0.000517409 0.000516162 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 50.96 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 7.00e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 6.6 sec: 0.703423 ( -0.0620892 0.0623668 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.20873e-07 ( -3.84577e-08 3.86573e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.700 sec. to 5.900 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.972903 ( -0.624725 0.185013 )
Epeak [keV] : 503.454 ( -520.524 -520.524 )
Norm@50keV : 6.82824E-03 ( -0.00116324 0.0058712 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 50.85 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 6.70e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 6.6 sec: 0.699456 ( -0.065113 0.064781 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.18406e-07 ( -4.12421e-08 4.04989e-08 ) ergs/cm2
Band function
Time interval is from -0.700 sec. to 5.900 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 9.61743E-02 ( 0.55088 0.55088 )
beta : -1.15103 ( 1.13479 0.18891 )
Epeak [keV] : 58.0146 ( -57.5624 163.672 )
Norm@50keV : 3.43467E-02 ( -0.0361816 134.264 )
------------------------------------------------------------
Photon flux (15-150 keV) in 6.6 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] : 21.3321 (-2.47309 2.93988)
R^2/D10^2 : 2.66087E-02 (-0.00895961 0.0130189)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 76.69 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 4.20e-02 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.500e-08 2.713e-09
25- 50 7.783e-08 1.070e-08
50-150 2.643e-07 3.970e-08
15-150 3.571e-07 4.353e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-17.2651 -200)
Norm : 2.93589 (-0.25535 0.25535)
------------------------------------------------------------
#Fit statistic : Chi-Squared 76.47 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 4.36e-02 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.826e-08 9.233e-09
25- 50 9.284e-08 3.104e-08
50-150 2.036e-07 1.086e-07
15-150 3.447e-07 1.337e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.44522 (-2.32559 3.20374)
R1^2/D10^2 : 0.304206 (-0.183276 0.548851)
kT2 [keV] : 36.0274 (-9.13209 28.1617)
R2^2/D10^2 : 4.31794E-03 (-0.00335355 0.00647631)
------------------------------------------------------------
#Fit statistic : Chi-Squared 49.95 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 3.201e-08 1.737e-08
25- 50 8.548e-08 3.881e-08
50-150 2.991e-07 1.508e-07
15-150 4.166e-07 1.783e-07
Peak spectrum fit
Power-law model
Time interval is from 4.280 sec. to 5.280 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.25306 ( -0.281045 0.275589 )
Norm@50keV : 8.76751E-03 ( -0.00137676 0.00137503 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 46.63 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.35e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 1.03748 ( -0.166718 0.167178 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.76742e-08 ( -1.53069e-08 1.55244e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 4.280 sec. to 5.280 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.970829 ( -1.29495 1.09257 )
Epeak [keV] : 189.334 ( -189.335 -189.335 )
Norm@50keV : 1.20652E-02 ( -0.00457095 0.0377895 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 46.43 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.15e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 1.02474 ( -0.17444 0.1732 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.58317e-08 ( -1.7229e-08 1.68053e-08 ) ergs/cm2
Band function
Time interval is from 4.280 sec. to 5.280 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.27980 ( -3.8707 -3.8707 )
beta : -1.37437 ( 1.37672 0.344651 )
Epeak [keV] : 31.4649 ( -30.5367 101.672 )
Norm@50keV : 14.8368 ( -14.7964 108.009 )
------------------------------------------------------------
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] : 17.3512 (-3.37088 4.48814)
R^2/D10^2 : 7.47715E-02 (-0.0400415 0.0806786)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 53.82 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 5.95e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.558e-09 1.494e-09
25- 50 2.050e-08 5.525e-09
50-150 4.434e-08 1.531e-08
15-150 6.939e-08 1.836e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-61.2228 -200)
Norm : 4.29171 (-0.681543 0.681543)
------------------------------------------------------------
#Fit statistic : Chi-Squared 49.52 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 7.49e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.069e-08 6.175e-09
25- 50 2.056e-08 1.139e-08
50-150 4.509e-08 2.532e-08
15-150 7.633e-08 4.316e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.05512 (-4.57638 5.94677)
R1^2/D10^2 : 0.425767 (-0.310554 0.665341)
kT2 [keV] : 35.9299 (-16.9283 -37.0416)
R2^2/D10^2 : 5.24326E-03 (-0.00475169 0.0387878)
------------------------------------------------------------
#Fit statistic : Chi-Squared 46.16 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 7.96e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.760e-09 4.635e-09
25- 50 2.084e-08 1.148e-08
50-150 5.733e-08 3.106e-08
15-150 8.593e-08 4.468e-08
Plot creation:
Thu Feb 11 09:26:13 EST 2021