batgrbproduct analysis for trigger=1034325
batgrbproduct Analysis for Trigger=1034325
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): Tue Feb 23 08:53:23 EST 2021
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1034325/GCN5_download_cron
======================================================================
Trigger: 01034325 Segment: 000
BAT Trigger Time: 635726272.832 [s; MET]
Trigger Stop: 635726274.88 [s; MET]
UTC: 2021-02-22T22:37:26.278180 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 154.621353612647 Dec: -14.898108406699 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.45
Image Trigger?: NO
Rate S/N Ratio: 10.3440804327886 [ if not an image trigger ]
Image S/N Ratio: 7.45
Flight Position: [ source = BAT ]
RA: 154.621353612647 Dec: -14.898108406699 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 154.630796438096 Dec: -14.9460368203888 [deg; J2000]
{ 10h 18m 31.4s , -14d 56' 45.7" }
+/- 2.00631058428328 [arcmin] (estimated 90% radius based on SNR)
+/- 0.776092913867721 [arcmin] (formal 1-sigma fit error)
SNR: 11.2491835329594
Angular difference between Flight and Ground position is 2.927353 arcmin
Partial Coding Fraction: 0.3867188 [ including projection effects ]
Duration
T90: 12.8240000009537 +/- 1.28404985768976
Measured from: -10.4399999380112
to: 2.3840000629425 [s; relative to TRIGTIME]
T50: 9.90399992465973 +/- 6.13132440425512
Measured from: -8.49999988079071
to: 1.40400004386902 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.871999979019165
to: 1.87199997901917 [s; relative to TRIGTIME]
Total Fluence
Measured from: -11.3680000305176
to: 2.72399997711182 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.352857 0.256476 0.113195 0.014976
0.040258 0.041182 0.034821 0.030562 [error]
Peak 0.064112 0.057820 0.047584 0.023616
0.011342 0.011966 0.010232 0.008193 [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 1.01e-07 1.10e-07 8.48e-08 1.08e-07 3.36e-07 4.03e-07 erg/cm2
Error 1.92e-08 1.97e-08 2.95e-08 7.02e-08 6.94e-08 1.13e-07 erg/cm2
Peak flux Power-law 5.85e-01 4.86e-01 2.74e-01 2.29e-01 1.45e+00 1.57e+00 ph/cm2/s
Error 1.67e-01 9.30e-02 7.47e-02 1.19e-01 2.78e-01 3.00e-01 ph/cm2/s
Fluence Cutoff-PL 1.00e-07 1.18e-07 6.94e-08 2.09e-08 3.04e-07 3.09e-07 erg/cm2
Error 2.00e-08 2.62e-08 5.54e-08 1.01e-07 9.53e-08 1.48e-07 erg/cm2
Peak flux Cutoff-PL 5.90e-01 4.86e-01 2.72e-01 2.23e-01 1.45e+00 1.57e+00 ph/cm2/s
Error 1.39e-01 9.23e-02 7.85e-02 1.83e-01 2.78e-01 2.98e-01 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 5.89e-01 4.87e-01 2.72e-01 2.24e-01 1.45e+00 1.57e+00 ph/cm2/s
Error -------- 9.84e-02 7.88e-02 -------- 2.78e-01 -------- ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.370 0.331 - - 2.46e-03 6.32e-04 72.040 57
CPL 1.619 3.867 16.8 15.8 7.79e-03 1.17e+03 71.220 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.827 0.328 - - 1.04e-02 2.22e-03 50.130 57
CPL 1.830 0.654 9999.3 -0.0 1.04e-02 1.08e-02 50.130 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 14.092 -11.368 2.724
T90 12.824 -10.440 2.384
T50 9.904 -8.500 1.404
Peak 1.000 0.872 1.872
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
154.6308 -14.9460 0.0171 28.4 82.8 0.8527 11.2 TRIG_01034325
------------------------------------------
Foreground time interval of the image:
-11.368 2.724 (delta_t = 14.092 [sec])
Background time interval of the image:
-239.832 -11.368 (delta_t = 228.464 [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 -11.368 sec. to 2.724 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.36957 ( -0.311122 0.351113 )
Norm@50keV : 2.45759E-03 ( -0.000634544 0.000628703 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 72.04 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.66e-02 with 57 degrees of freedom
Photon flux (15-150 keV) in 14.09 sec: 0.446747 ( -0.0707728 0.0708074 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.3552e-07 ( -6.75928e-08 7.12204e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -11.368 sec. to 2.724 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.61920 ( -7.3547 0.380079 )
Epeak [keV] : 16.7801 ( -10.3314 21.3054 )
Norm@50keV : 7.78958E-03 ( -0.00449871 2332.6 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 71.22 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.27e-02 with 56 degrees of freedom
Photon flux (15-150 keV) in 14.09 sec: 0.438360 ( -0.070138 0.072408 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.03694e-07 ( -9.94613e-08 9.11919e-08 ) ergs/cm2
Band function
Time interval is from -11.368 sec. to 2.724 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.63808 ( -3.85668 0.459274 )
beta : -10.0000 ( 10 3.55271e-15 )
Epeak [keV] : 16.5472 ( -6.71969 22.037 )
Norm@50keV : 7.51039E-03 ( -0.00433957 271.128 )
------------------------------------------------------------
Photon flux (15-150 keV) in 14.09 sec: 0.439480 ( ) 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] : 6.37678 (-0.938496 1.15703)
R^2/D10^2 : 1.26653 (-0.640264 1.23359)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 72.81 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 7.72e-02 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.047e-07 2.711e-08
25- 50 1.189e-07 3.748e-08
50-150 1.388e-08 8.434e-09
15-150 2.375e-07 5.319e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 32.9728 (-11.081 19.5957)
Norm : 3.34123 (-0.975289 1.52121)
------------------------------------------------------------
#Fit statistic : Chi-Squared 71.21 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 9.75e-02 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.002e-07 2.085e-08
25- 50 1.204e-07 2.847e-08
50-150 7.440e-08 4.181e-08
15-150 2.951e-07 7.383e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.52404 (-1.01837 1.14533)
R1^2/D10^2 : 2.04932 (-0.979404 1.82389)
kT2 [keV] : 24.0614 (-10.8985 64.0073)
R2^2/D10^2 : 3.28551E-03 (-0.00322032 0.0297906)
------------------------------------------------------------
#Fit statistic : Chi-Squared 65.92 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.49e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.077e-07 5.027e-08
25- 50 1.117e-07 5.351e-08
50-150 1.194e-07 7.636e-08
15-150 3.388e-07 1.449e-07
Peak spectrum fit
Power-law model
Time interval is from 0.872 sec. to 1.872 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.82657 ( -0.309931 0.345635 )
Norm@50keV : 1.03875E-02 ( -0.00226951 0.00217115 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 50.13 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 7.28e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 1.44638 ( -0.277934 0.277997 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.55525e-08 ( -2.0574e-08 2.06403e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.872 sec. to 1.872 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.82952 ( -0.923066 0.384887 )
Epeak [keV] : 9999.26 ( -9999.33 -9999.34 )
Norm@50keV : 1.03703E-02 ( -0.00227114 0.0193375 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 50.13 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 6.96e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 1.44710 ( -0.27827 0.27699 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.55208e-08 ( -2.04894e-08 2.06962e-08 ) ergs/cm2
Band function
Time interval is from 0.872 sec. to 1.872 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.93448 ( -4.93448 -4.93448 )
beta : -1.89319 ( -0.469484 0.343742 )
Epeak [keV] : 21.1448 ( -21.1448 7.43645 )
Norm@50keV : 3828.71 ( -725.371 1.32022e+07 )
------------------------------------------------------------
Photon flux (15-150 keV) in 1 sec: 1.44728 ( 5.55272 -0.27919 ) 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] : 9.54272 (-2.94783 8.84969)
R^2/D10^2 : 0.766441 (-0.743075 2.35583)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 66.59 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.80e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.396e-08 5.882e-09
25- 50 3.245e-08 1.113e-08
50-150 1.477e-08 7.683e-09
15-150 6.118e-08 2.503e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 122.631 (-61.5799 -121.539)
Norm : 6.09601 (-1.35714 1.93932)
------------------------------------------------------------
#Fit statistic : Chi-Squared 51.29 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 6.88e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.586e-08 5.649e-09
25- 50 2.849e-08 1.527e-08
50-150 5.138e-08 3.430e-08
15-150 9.573e-08 5.404e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.29144 (-1.46759 1.91872)
R1^2/D10^2 : 5.90696 (-4.22811 18.4928)
kT2 [keV] : 26.3094 (-7.28498 13.9719)
R2^2/D10^2 : 1.61326E-02 (-0.0126086 0.0247609)
------------------------------------------------------------
#Fit statistic : Chi-Squared 47.45 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 7.55e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.981e-08 1.125e-08
25- 50 2.441e-08 1.237e-08
50-150 5.655e-08 3.409e-08
15-150 1.008e-07 5.184e-08
Plot creation:
Tue Feb 23 08:56:22 EST 2021