batgrbproduct analysis for trigger=1003002
batgrbproduct Analysis for Trigger=1003002
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): Fri Oct 30 22:16:32 EDT 2020
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger1003002/GCN5_download_cron
======================================================================
Trigger: 01003002 Segment: 000
BAT Trigger Time: 625695616 [s; MET]
Trigger Stop: 625695680 [s; MET]
UTC: 2020-10-29T20:19:50.108900 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 229.60109564193 Dec: 44.4639833801875 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 15.03
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 15.03
Flight Position: [ source = BAT ]
RA: 229.60109564193 Dec: 44.4639833801875 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 229.609180260318 Dec: 44.479892115861 [deg; J2000]
{ 15h 18m 26.2s , +44d 28' 47.6" }
+/- 1.9243421534314 [arcmin] (estimated 90% radius based on SNR)
+/- 0.919404375448759 [arcmin] (formal 1-sigma fit error)
SNR: 11.9399035354266
Angular difference between Flight and Ground position is 1.015350 arcmin
Partial Coding Fraction: 0.9609375 [ including projection effects ]
Duration
T90: 492.092000007629 +/- 17.3455471034018
Measured from: 1.93600010871887
to: 494.028000116348 [s; relative to TRIGTIME]
T50: 377.151999950409 +/- 59.712696780813
Measured from: 19.5680000782013
to: 396.72000002861 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 11.9279999732971
to: 12.9279999732971 [s; relative to TRIGTIME]
Total Fluence
Measured from: -3.36800003051758
to: 510.784000039101 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.425116 1.600285 1.374705 0.441195
0.121512 0.125749 0.110300 0.096964 [error]
Peak 0.010667 0.026943 0.037937 0.011002
0.005332 0.005822 0.005286 0.004378 [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 3.43e-07 6.80e-07 1.05e-06 3.53e-06 2.93e-06 5.60e-06 erg/cm2
Error 5.03e-08 5.74e-08 1.09e-07 8.35e-07 2.64e-07 9.06e-07 erg/cm2
Peak flux Power-law 1.03e-01 1.73e-01 2.22e-01 5.74e-01 6.57e-01 1.07e+00 ph/cm2/s
Error 4.71e-02 4.81e-02 3.85e-02 2.35e-01 1.22e-01 2.29e-01 ph/cm2/s
Fluence Cutoff-PL 3.43e-07 6.79e-07 1.04e-06 3.27e-06 2.93e-06 5.32e-06 erg/cm2
Error 5.00e-08 5.60e-08 1.08e-07 8.88e-07 2.62e-07 1.18e-06 erg/cm2
Peak flux Cutoff-PL 9.73e-02 1.72e-01 2.26e-01 5.23e-01 6.53e-01 1.03e+00 ph/cm2/s
Error 5.96e-02 5.26e-02 4.65e-02 3.11e-01 1.27e-01 3.19e-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 1.376 0.149 - - 5.86e-04 4.62e-05 66.400 0
CPL 1.372 0.162 9999.3 0.0 5.87e-04 3.93e-04 66.430 0
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.640 0.348 - - 5.65e-03 1.15e-03 58.000 0
CPL 0.511 1.093 813.3 0.0 6.26e-03 7.40e-03 57.960 0
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: 121.088000 sec.
T50 in the 50-300 keV band: 46.592000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 514.152 -3.368 510.784
T90 492.092 1.936 494.028
T50 377.152 19.568 396.720
Peak 1.000 11.928 12.928
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
229.6092 +44.4799 0.0161 10.3 124.7 2.5813 11.9 TRIG_01003002
------------------------------------------
Foreground time interval of the image:
-3.368 72.901 (delta_t = 76.269 [sec])
Background time interval of the image:
-18.499 -3.368 (delta_t = 15.131 [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 -3.368 sec. to 510.784 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.37644 ( -0.149005 0.149132 )
Norm@50keV : 5.86291E-04 ( -4.62527e-05 4.6107e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 66.40 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.85e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 514.2 sec: 7.10269E-02 ( -0.00564229 0.00565705 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.9274e-06 ( -2.62327e-07 2.64717e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -3.368 sec. to 510.784 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.37209 ( -0.173592 0.151271 )
Epeak [keV] : 9999.28 ( -9999.36 -9999.36 )
Norm@50keV : 5.86969E-04 ( -0.000588473 0.000197591 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 66.43 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.61e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 514.2 sec: 7.11234E-02 ( -0.005762 0.0055529 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.93289e-06 ( -2.67199e-07 2.57691e-07 ) ergs/cm2
Band function
Time interval is from -3.368 sec. to 510.784 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.10731 ( 1.10731 1.10731 )
beta : -1.37642 ( -0.150558 0.149017 )
Epeak [keV] : 37.1368 ( -37.1368 -37.1368 )
Norm@50keV : 1.14787E-03 ( -0.000607037 1.76511 )
------------------------------------------------------------
Photon flux (15-150 keV) in 514.2 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] : 16.9783 ( )
R^2/D10^2 : 5.17904E-03 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 121.31 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.51e-06 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.564e-07 2.576e-08
25- 50 6.913e-07 8.330e-08
50-150 1.422e-06 2.404e-07
15-150 2.270e-06 2.304e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-30.0085 -200)
Norm : 0.291307 (-0.0227485 0.0227485)
------------------------------------------------------------
#Fit statistic : Chi-Squared 73.47 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 7.00e-02 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.730e-07 4.093e-08
25- 50 7.175e-07 1.674e-07
50-150 1.574e-06 6.253e-07
15-150 2.664e-06 8.230e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.87831 (-1.4481 2.02625)
R1^2/D10^2 : 0.140221 (-0.0909002 0.299253)
kT2 [keV] : 29.5966 (-6.19145 12.9493)
R2^2/D10^2 : 7.25744E-04 (-0.00048158 0.000844438)
------------------------------------------------------------
#Fit statistic : Chi-Squared 67.83 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.15e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.728e-07 1.142e-07
25- 50 6.226e-07 1.414e-07
50-150 1.993e-06 6.690e-07
15-150 2.989e-06 7.505e-07
Peak spectrum fit
Power-law model
Time interval is from 11.928 sec. to 12.928 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.639776 ( -0.364915 0.331168 )
Norm@50keV : 5.64932E-03 ( -0.00117473 0.00111944 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 58.00 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 4.38e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 0.656625 ( -0.121325 0.122454 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.0894e-08 ( -1.27718e-08 1.28191e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 11.928 sec. to 12.928 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.510555 ( -1.73352 0.452959 )
Epeak [keV] : 813.315 ( -808.461 -808.461 )
Norm@50keV : 6.26341E-03 ( -0.00138171 0.0134199 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 57.96 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 4.03e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 0.652555 ( -0.128736 0.125103 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.087e-08 ( -1.28485e-08 1.28122e-08 ) ergs/cm2
Band function
Time interval is from 11.928 sec. to 12.928 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.931722 ( 0.931722 0.931722 )
beta : -0.639774 ( -0.331173 0.364933 )
Epeak [keV] : 14.1471 ( -14.1471 -14.1471 )
Norm@50keV : 8.18622E-03 ( -0.00368843 0 )
------------------------------------------------------------
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] : 34.6930 (-7.7597 12.6998)
R^2/D10^2 : 6.87902E-03 (-0.00381225 0.00707131)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 60.39 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 3.54e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.179e-09 5.149e-10
25- 50 7.687e-09 2.431e-09
50-150 6.088e-08 2.447e-08
15-150 6.974e-08 2.998e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-39.4332 -200)
Norm : 2.60926 (-0.511224 0.511224)
------------------------------------------------------------
#Fit statistic : Chi-Squared 78.84 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 2.93e-02 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.501e-09 3.792e-09
25- 50 1.251e-08 7.300e-09
50-150 2.743e-08 1.590e-08
15-150 4.644e-08 2.727e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.17824 (-2.69991 3.94135)
R1^2/D10^2 : 0.641531 (-0.554732 4.66658)
kT2 [keV] : 42.3468 (-11.5353 26.9278)
R2^2/D10^2 : 3.80299E-03 (-0.00260024 0.00514358)
------------------------------------------------------------
#Fit statistic : Chi-Squared 54.24 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 5.03e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.234e-09 2.417e-09
25- 50 9.453e-09 4.944e-09
50-150 6.027e-08 3.289e-08
15-150 7.396e-08 4.000e-08
Plot creation:
Fri Oct 30 22:21:14 EDT 2020