batgrbproduct analysis for trigger=1033264
batgrbproduct Analysis for Trigger=1033264
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 06:52:25 EST 2021
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1033264/GCN5_download_cron
======================================================================
Trigger: 01033264 Segment: 000
BAT Trigger Time: 635297168.832 [s; MET]
Trigger Stop: 635297169.856 [s; MET]
UTC: 2021-02-17T23:25:42.306620 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 97.6103563204343 Dec: 68.7148663144961 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 13.81
Image Trigger?: NO
Rate S/N Ratio: 30.1662062579967 [ if not an image trigger ]
Image S/N Ratio: 13.81
Flight Position: [ source = BAT ]
RA: 97.6103563204343 Dec: 68.7148663144961 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 97.5775591347836 Dec: 68.7153780147845 [deg; J2000]
{ 06h 30m 18.6s , +68d 42' 55.4" }
+/- 1.44711608513481 [arcmin] (estimated 90% radius based on SNR)
+/- 0.601165316916194 [arcmin] (formal 1-sigma fit error)
SNR: 17.9402235405373
Angular difference between Flight and Ground position is 0.714993 arcmin
Partial Coding Fraction: 0.3085938 [ including projection effects ]
Duration
T90: 4.22399997711182 +/- 1.14855034357386
Measured from: -0.295999884605408
to: 3.92800009250641 [s; relative to TRIGTIME]
T50: 1.23200011253357 +/- 0.505204856762237
Measured from: 0.216000080108643
to: 1.44800019264221 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.131999969482422
to: 0.868000030517578 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.648000001907349
to: 4.88800001144409 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.362817 0.505060 0.240636 0.032742
0.034315 0.036743 0.031537 0.027629 [error]
Peak 0.152374 0.225702 0.154509 0.052994
0.017453 0.018962 0.016706 0.012795 [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 1.52e-07 2.05e-07 2.04e-07 3.66e-07 6.79e-07 9.26e-07 erg/cm2
Error 1.98e-08 1.85e-08 2.98e-08 1.06e-07 7.01e-08 1.38e-07 erg/cm2
Peak flux Power-law 1.94e+00 1.72e+00 1.05e+00 9.64e-01 5.11e+00 5.67e+00 ph/cm2/s
Error 3.06e-01 1.72e-01 1.32e-01 2.41e-01 5.07e-01 5.41e-01 ph/cm2/s
Fluence Cutoff-PL 1.38e-07 2.29e-07 1.99e-07 9.40e-08 6.29e-07 6.60e-07 erg/cm2
Error 2.30e-08 2.69e-08 3.59e-08 1.18e-07 7.87e-08 1.42e-07 erg/cm2
Peak flux Cutoff-PL 1.86e+00 1.76e+00 1.07e+00 7.45e-01 5.07e+00 5.44e+00 ph/cm2/s
Error 3.62e-01 2.08e-01 1.51e-01 3.17e-01 5.18e-01 6.93e-01 ph/cm2/s
Fluence Band 1.33e-07 2.34e-07 1.90e-07 1.91e-07 6.38e-07 7.51e-07 erg/cm2
Error -------- -------- 3.48e-08 -------- 7.53e-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 2.007 0.163 - - 1.33e-02 1.44e-03 75.030 57
CPL 1.062 0.856 42.5 13.8 4.56e-02 7.14e-02 70.320 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.716 0.163 - - 3.83e-02 3.84e-03 53.230 57
CPL 1.482 0.556 111.6 -12.1 5.04e-02 5.05e-02 52.850 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: 0.768000 sec.
T50 in the 50-300 keV band: 0.384000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 5.536 -0.648 4.888
T90 4.224 -0.296 3.928
T50 1.232 0.216 1.448
Peak 1.000 -0.132 0.868
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
97.5776 +68.7154 0.0107 45.7 175.0 1.2305 17.9 TRIG_01033264
------------------------------------------
Foreground time interval of the image:
-0.648 4.888 (delta_t = 5.536 [sec])
Background time interval of the image:
-239.832 -0.648 (delta_t = 239.184 [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 -0.648 sec. to 4.888 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.00744 ( -0.15948 0.166746 )
Norm@50keV : 1.32900E-02 ( -0.00144892 0.00142371 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 75.03 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 5.49e-02 with 57 degrees of freedom
Photon flux (15-150 keV) in 5.536 sec: 2.00036 ( -0.183377 0.183539 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.78758e-07 ( -6.96927e-08 7.04832e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.648 sec. to 4.888 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.06223 ( -0.954 0.758279 )
Epeak [keV] : 42.4753 ( -12.8697 14.6401 )
Norm@50keV : 4.55887E-02 ( -0.0283287 0.114516 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 70.32 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 9.45e-02 with 56 degrees of freedom
Photon flux (15-150 keV) in 5.536 sec: 1.93400 ( -0.19176 0.19104 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.29316e-07 ( -7.72073e-08 8.01557e-08 ) ergs/cm2
Band function
Time interval is from -0.648 sec. to 4.888 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.617233 ( -1.04033 1.84601 )
beta : -2.61385 ( 2.61482 0.494922 )
Epeak [keV] : 39.1745 ( -9.94185 12.2589 )
Norm@50keV : 8.76138E-02 ( -0.0887086 2.30308 )
------------------------------------------------------------
Photon flux (15-150 keV) in 5.536 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 6.38052e-07 ( -6.38013e-07 -7.4891e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.3768 (-0.96705 1.07016)
R^2/D10^2 : 0.823127 (-0.261775 0.379669)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 84.57 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.03e-02 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.011e-07 1.636e-08
25- 50 2.646e-07 2.757e-08
50-150 1.535e-07 3.538e-08
15-150 5.192e-07 5.752e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 66.4571 (-15.5175 22.9252)
Norm : 10.0821 (-1.42247 1.6005)
------------------------------------------------------------
#Fit statistic : Chi-Squared 70.54 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.07e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.423e-07 1.808e-08
25- 50 2.233e-07 2.248e-08
50-150 2.757e-07 6.079e-08
15-150 6.413e-07 7.703e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.98471 (-5.15182 2.07859)
R1^2/D10^2 : 1.80323 (-0.841801 70.8269)
kT2 [keV] : 26.1202 (-15.1379 124.005)
R2^2/D10^2 : 1.18465E-02 (-0.0106984 0.504657)
------------------------------------------------------------
#Fit statistic : Chi-Squared 71.91 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 6.26e-02 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.375e-07 6.558e-08
25- 50 2.283e-07 9.215e-08
50-150 2.237e-07 1.205e-07
15-150 5.896e-07 2.318e-07
Peak spectrum fit
Power-law model
Time interval is from -0.132 sec. to 0.868 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.71606 ( -0.16115 0.165675 )
Norm@50keV : 3.82902E-02 ( -0.00385932 0.00382525 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 53.23 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 6.17e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 5.11422 ( -0.506886 0.507793 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.54093e-07 ( -3.68982e-08 3.70586e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.132 sec. to 0.868 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.48242 ( -0.725217 0.386042 )
Epeak [keV] : 111.585 ( -87.4211 -111.611 )
Norm@50keV : 5.04110E-02 ( -0.0346292 0.066371 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 52.85 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 5.95e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 5.07439 ( -0.51819 0.51809 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.50458e-07 ( -3.8992e-08 3.8502e-08 ) ergs/cm2
Band function
Time interval is from -0.132 sec. to 0.868 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.11588 ( 1.11609 1.11609 )
beta : -1.91738 ( 1.91647 0.331185 )
Epeak [keV] : 63.3800 ( -63.3495 -63.3495 )
Norm@50keV : 8.24864E-02 ( -0.0444557 0 )
------------------------------------------------------------
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.48359e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.1946 (-1.45977 1.66936)
R^2/D10^2 : 0.893421 (-0.318417 0.480815)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 79.12 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 2.79e-02 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.298e-08 6.745e-09
25- 50 1.154e-07 1.552e-08
50-150 1.281e-07 2.467e-08
15-150 2.765e-07 3.295e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 139.230 (-45.8783 -138.108)
Norm : 21.2163 (-2.39833 3.02493)
------------------------------------------------------------
#Fit statistic : Chi-Squared 53.08 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 6.23e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.481e-08 7.105e-09
25- 50 1.005e-07 2.337e-08
50-150 1.921e-07 8.625e-08
15-150 3.474e-07 1.072e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.84545 (-3.08783 2.2932)
R1^2/D10^2 : 2.93499 (-1.32249 6.88527)
kT2 [keV] : 35.7400 (-17.5411 -38.485)
R2^2/D10^2 : 1.57326E-02 (-0.0123339 0.112493)
------------------------------------------------------------
#Fit statistic : Chi-Squared 55.35 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 4.61e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.710e-08 1.478e-08
25- 50 1.101e-07 4.067e-08
50-150 1.856e-07 9.114e-08
15-150 3.428e-07 1.382e-07
Plot creation:
Thu Feb 18 06:58:28 EST 2021