batgrbproduct analysis for trigger=1005428
batgrbproduct Analysis for Trigger=1005428
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 Nov 12 10:58:28 EST 2020
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger1005428/GCN5_download_cron
======================================================================
Trigger: 01005428 Segment: 000
BAT Trigger Time: 626780732.392 [s; MET]
Trigger Stop: 626780732.4 [s; MET]
UTC: 2020-11-11T09:45:06.429280 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 277.701086911644 Dec: -6.74101176954741 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 10.59
Image Trigger?: NO
Rate S/N Ratio: 73.5391052434009 [ if not an image trigger ]
Image S/N Ratio: 10.59
Flight Position: [ source = BAT ]
RA: 277.701086911644 Dec: -6.74101176954741 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 277.6740353515 Dec: -6.74648886318678 [deg; J2000]
{ 18h 30m 41.8s , -06d 44' 47.4" }
+/- 1.70076699442543 [arcmin] (estimated 90% radius based on SNR)
+/- 0.469795988352011 [arcmin] (formal 1-sigma fit error)
SNR: 14.2437971818499
Angular difference between Flight and Ground position is 1.645023 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 0.0119999647140503 +/- 0.00565686571406321
Measured from: 1.19209289550781e-07
to: 0.0120000839233398 [s; relative to TRIGTIME]
T50: 0.00800001621246338 +/- 0.004
Measured from: 1.19209289550781e-07
to: 0.00800013542175293 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.491999983787537
to: 0.508000016212463 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 0.0120000839233398 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.021356 0.020652 0.008709 0.001375
0.002353 0.002425 0.001548 0.000557 [error]
Peak 0.024503 0.028587 0.010091 0.003337
0.006957 0.006601 0.005543 0.004517 [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 5.63e-09 7.10e-09 6.52e-09 1.05e-08 2.28e-08 2.97e-08 erg/cm2
Error 9.84e-10 9.21e-10 1.37e-09 4.23e-09 3.33e-09 5.93e-09 erg/cm2
Peak flux Power-law 2.34e-01 1.75e-01 8.75e-02 6.24e-02 5.26e-01 5.59e-01 ph/cm2/s
Error 8.74e-02 5.00e-02 4.02e-02 5.39e-02 1.49e-01 1.61e-01 ph/cm2/s
Fluence Cutoff-PL 5.41e-09 7.78e-09 6.45e-09 3.77e-09 2.19e-08 2.34e-08 erg/cm2
Error 1.07e-09 1.40e-09 1.53e-09 8.88e-09 3.47e-09 7.60e-09 erg/cm2
Peak flux Cutoff-PL 2.01e-01 2.17e-01 8.05e-02 7.61e-03 5.05e-01 5.06e-01 ph/cm2/s
Error 1.00e-01 7.22e-02 5.39e-02 4.31e-02 1.48e-01 1.50e-01 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 2.04e-01 2.15e-01 8.19e-02 8.02e-03 5.08e-01 5.08e-01 ph/cm2/s
Error 9.93e-02 -------- -------- -------- 1.49e-01 -------- ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.123 0.223 - - 2.04e-01 3.24e-02 36.000 0
CPL 1.477 0.929 33.8 -0.3 4.89e-01 1.14e+00 34.780 0
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.001 0.502 - - 3.50e-03 1.26e-03 55.270 0
CPL 0.091 3.179 39.9 0.0 4.76e-02 9.56e+00 53.100 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 0.012 0.000 0.012
T90 0.012 0.000 0.012
T50 0.008 0.000 0.008
Peak 1.000 -0.492 0.508
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
277.6740 -6.7465 0.0135 5.3 13.2 0.0546 14.2 TRIG_01005428
------------------------------------------
Foreground time interval of the image:
0.000 0.012 (delta_t = 0.012 [sec])
Background time interval of the image:
-150.091 0.000 (delta_t = 150.091 [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 0.000 sec. to 0.012 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.12275 ( -0.2165 0.230151 )
Norm@50keV : 0.204057 ( -0.0327978 0.031929 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 36.00 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 9.87e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 0.012 sec: 32.4687 ( -4.22954 4.23077 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.28037e-08 ( -3.30955e-09 3.3423e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.012 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.47669 ( -1.15617 0.701253 )
Epeak [keV] : 33.8377 ( -33.2093 -33.8386 )
Norm@50keV : 0.489178 ( -0.489232 1.80008 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 34.78 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 9.88e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 0.012 sec: 32.2315 ( -4.2642 4.2527 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.19305e-08 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.012 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.26865 ( 1.29053 5.97572 )
beta : -2.72573 ( 2.70779 0.734884 )
Epeak [keV] : 34.6031 ( -34.569 19.723 )
Norm@50keV : 0.657451 ( -0.620221 60808.8 )
------------------------------------------------------------
Photon flux (15-150 keV) in 0.012 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] : 10.0490 (-1.37419 1.51669)
R^2/D10^2 : 15.3853 (-6.61949 11.9502)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 48.27 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 7.88e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.803e-09 9.654e-10
25- 50 9.522e-09 1.640e-09
50-150 5.040e-09 1.639e-09
15-150 1.836e-08 3.144e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 56.0583 (-15.2819 24.4497)
Norm : 178.609 (-36.048 42.4119)
------------------------------------------------------------
#Fit statistic : Chi-Squared 34.85 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 9.91e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.323e-09 8.940e-10
25- 50 7.929e-09 1.147e-09
50-150 8.515e-09 2.483e-09
15-150 2.177e-08 3.648e-09
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.02119 (-1.53694 2.67645)
R1^2/D10^2 : 338.197 (-284.102 1289.8)
kT2 [keV] : 13.7195 (-2.70668 7.29125)
R2^2/D10^2 : 3.56454 (-3.07758 4.9013)
------------------------------------------------------------
#Fit statistic : Chi-Squared 35.09 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 9.83e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.490e-09 2.767e-09
25- 50 7.596e-09 4.019e-09
50-150 7.631e-09 4.387e-09
15-150 2.072e-08 9.023e-09
Peak spectrum fit
Power-law model
Time interval is from -0.492 sec. to 0.508 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.00107 ( -0.465208 0.539298 )
Norm@50keV : 3.50245E-03 ( -0.0012815 0.00123777 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 55.27 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 5.40e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 0.525626 ( -0.14898 0.148981 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.22982e-08 ( -1.0745e-08 1.13996e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.492 sec. to 0.508 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 9.06962E-02 ( -4.14083 2.21787 )
Epeak [keV] : 39.8734 ( -39.8697 -39.8697 )
Norm@50keV : 4.75899E-02 ( -0.0479479 19.0695 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 53.10 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 5.85e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 0.505287 ( -0.146187 0.149487 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.82077e-08 ( -9.6037e-09 1.18379e-08 ) ergs/cm2
Band function
Time interval is from -0.492 sec. to 0.508 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -8.49291E-02 ( -1.92054 3.51785 )
beta : -10.0000 ( 10 3.55271e-15 )
Epeak [keV] : 39.8604 ( -18.4435 153.723 )
Norm@50keV : 4.79966E-02 ( -0.0479966 19.2606 )
------------------------------------------------------------
Photon flux (15-150 keV) in 1 sec: 0.508261 ( 6.49174 -0.150574 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.82644e-08 ( -2.82574e-08 -9.4783e-09 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.89813 (-2.62111 3.54262)
R^2/D10^2 : 0.271433 (-0.271449 0.603622)
(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 5.397e-09 3.199e-09
25- 50 1.322e-08 7.995e-09
50-150 6.700e-09 4.590e-09
15-150 2.532e-08 1.587e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 60.6620 (-30.8635 109.228)
Norm : 2.80886 (-1.01369 1.61185)
------------------------------------------------------------
#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 7.072e-09 3.269e-09
25- 50 1.080e-08 6.440e-09
50-150 1.240e-08 9.825e-09
15-150 3.027e-08 1.815e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.85989 (-5.85991 -5.85991)
R1^2/D10^2 : 0.955115 (-0.955107 -0.955107)
kT2 [keV] : 13.6379 (-13.6379 -13.6379)
R2^2/D10^2 : 5.59365E-02 (-0.0559362 0.664711)
------------------------------------------------------------
#Fit statistic : Chi-Squared 53.02 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 5.51e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.411e-09 3.717e-09
25- 50 1.196e-08 7.375e-09
50-150 9.967e-09 7.270e-09
15-150 2.834e-08 1.779e-08
Plot creation:
Thu Nov 12 11:02:09 EST 2020