batgrbproduct analysis for trigger=1004168
batgrbproduct Analysis for Trigger=1004168
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): Wed Nov 4 19:58:30 EST 2020
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger1004168/batgroup_hand_proc
======================================================================
Trigger: 01004168 Segment: 000
BAT Trigger Time: 626204000.704 [s; MET]
Trigger Stop: 626204001.088 [s; MET]
UTC: 2020-11-04T17:32:54.779360 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 5.21659807530782 Dec: 7.82039469041078 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 11.43
Image Trigger?: NO
Rate S/N Ratio: 44.7772263544762 [ if not an image trigger ]
Image S/N Ratio: 11.43
Flight Position: [ source = BAT ]
RA: 5.21659807530782 Dec: 7.82039469041078 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 5.21475590367534 Dec: 7.83433711507239 [deg; J2000]
{ 00h 20m 51.5s , +07d 50' 03.6" }
+/- 0.814904700301502 [arcmin] (estimated 90% radius based on SNR)
+/- 0.31439251386285 [arcmin] (formal 1-sigma fit error)
SNR: 40.7482191460239
Angular difference between Flight and Ground position is 0.843682 arcmin
Partial Coding Fraction: 0.53125 [ including projection effects ]
Duration
T90: 8.6599999666214 +/- 0.161839373016547
Measured from: -8.32000005245209
to: 0.339999914169312 [s; relative to TRIGTIME]
T50: 5.27199995517731 +/- 0.214848738933558
Measured from: -6.91600000858307
to: -1.64400005340576 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -8.51999998092651
to: -7.51999998092651 [s; relative to TRIGTIME]
Total Fluence
Measured from: -8.8639999628067
to: 0.879999995231628 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.722135 1.025764 0.813727 0.234156
0.030209 0.033313 0.029924 0.024122 [error]
Peak 0.131237 0.184083 0.129096 0.032309
0.010767 0.012106 0.010303 0.007541 [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 2.41e-07 4.49e-07 6.46e-07 1.97e-06 1.84e-06 3.31e-06 erg/cm2
Error 1.73e-08 1.88e-08 3.04e-08 2.10e-07 7.40e-08 2.28e-07 erg/cm2
Peak flux Power-law 1.41e+00 1.37e+00 9.28e-01 9.87e-01 4.10e+00 4.69e+00 ph/cm2/s
Error 1.78e-01 1.06e-01 8.62e-02 1.88e-01 3.05e-01 3.40e-01 ph/cm2/s
Fluence Cutoff-PL 2.38e-07 4.51e-07 6.50e-07 1.82e-06 1.83e-06 3.16e-06 erg/cm2
Error 2.00e-08 2.03e-08 3.27e-08 3.81e-07 7.89e-08 3.91e-07 erg/cm2
Peak flux Cutoff-PL 1.39e+00 1.37e+00 9.33e-01 9.27e-01 4.09e+00 4.63e+00 ph/cm2/s
Error 1.87e-01 1.16e-01 8.14e-02 -------- 3.11e-01 4.42e-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 1.474 0.069 - - 1.98e-02 7.38e-04 60.500 0
CPL 1.471 0.178 9999.3 0.0 1.99e-02 3.91e-03 60.500 0
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.560 0.127 - - 3.23e-02 2.39e-03 55.170 0
CPL 1.536 0.319 998.3 0.0 3.32e-02 1.61e-02 0.506 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: 8.640000 sec.
T50 in the 50-300 keV band: 5.312000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 9.744 -8.864 0.880
T90 8.660 -8.320 0.340
T50 5.272 -6.916 -1.644
Peak 1.000 -8.520 -7.520
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
5.2148 +7.8343 0.0047 33.7 153.7 2.8802 40.7 TRIG_01004168
------------------------------------------
Foreground time interval of the image:
-8.864 0.880 (delta_t = 9.744 [sec])
Background time interval of the image:
-54.003 -8.864 (delta_t = 45.139 [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 -8.864 sec. to 0.880 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.47421 ( -0.0693382 0.0694415 )
Norm@50keV : 1.98077E-02 ( -0.000738644 0.000738249 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 60.50 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 3.51e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 9.744 sec: 2.45594 ( -0.0977575 0.0982276 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.83894e-06 ( -7.38218e-08 7.40867e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -8.864 sec. to 0.880 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.47136 ( -0.269269 0.0861854 )
Epeak [keV] : 9999.27 ( -9999.27 -9999.27 )
Norm@50keV : 1.98702E-02 ( -0.000741289 0.0070768 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 60.50 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 3.17e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 9.744 sec: 2.44756 ( -0.10093 0.10583 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.83315e-06 ( -7.69289e-08 8.07778e-08 ) ergs/cm2
Band function
Time interval is from -8.864 sec. to 0.880 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.17160 ( 1.03581 1.03581 )
beta : -1.51073 ( 1.51417 0.10511 )
Epeak [keV] : 103.426 ( -80.5535 -80.5535 )
Norm@50keV : 2.97904E-02 ( -0.00999085 0 )
------------------------------------------------------------
Photon flux (15-150 keV) in 9.744 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] : 16.3252 ( )
R^2/D10^2 : 0.202461 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 233.60 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 3.06e-23 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.082e-07 8.136e-09
25- 50 4.632e-07 2.353e-08
50-150 8.692e-07 5.993e-08
15-150 1.441e-06 6.334e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-13.1346 -200)
Norm : 10.0996 (-0.375827 0.375827)
------------------------------------------------------------
#Fit statistic : Chi-Squared 69.36 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.26e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.451e-07 1.018e-08
25- 50 4.715e-07 1.822e-08
50-150 1.034e-06 4.385e-08
15-150 1.751e-06 7.405e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.86032 (-1.09717 1.21247)
R1^2/D10^2 : 1.71654 (-0.615871 1.11558)
kT2 [keV] : 31.3792 (-4.86947 8.16052)
R2^2/D10^2 : 1.71019E-02 (-0.00890064 0.0136134)
------------------------------------------------------------
#Fit statistic : Chi-Squared 69.61 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.88e-02 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.093e-07 2.943e-08
25- 50 4.697e-07 4.321e-08
50-150 1.147e-06 1.861e-07
15-150 1.827e-06 1.978e-07
Peak spectrum fit
Power-law model
Time interval is from -8.520 sec. to -7.520 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.55969 ( -0.126441 0.127551 )
Norm@50keV : 3.23026E-02 ( -0.00239672 0.0023862 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 55.17 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 5.44e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 4.10088 ( -0.304702 0.305267 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.03687e-07 ( -2.42577e-08 2.43793e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -8.520 sec. to -7.520 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.53616 ( -0.487651 0.149446 )
Epeak [keV] : 998.308 ( -999.176 -999.176 )
Norm@50keV : 3.32043E-02 ( -0.00768739 0.0246012 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 55.17 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 5.06e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 4.09125 ( -0.30816 0.31354 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.02882e-07 ( -2.551e-08 2.5203e-08 ) ergs/cm2
Band function
Time interval is from -8.520 sec. to -7.520 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.28147 ( 1.20114 1.20114 )
beta : -1.61821 ( 1.62329 0.185662 )
Epeak [keV] : 100.444 ( -87.8198 -87.8198 )
Norm@50keV : 4.70633E-02 ( -0.0167664 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] : 14.3280 (-1.34899 1.53247)
R^2/D10^2 : 0.533068 (-0.162899 0.22804)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 110.13 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 3.07e-05 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.306e-08 3.375e-09
25- 50 8.774e-08 8.160e-09
50-150 1.200e-07 1.817e-08
15-150 2.308e-07 1.915e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.322 (-57.5085 -199.333)
Norm : 16.6818 (-1.19885 1.20061)
------------------------------------------------------------
#Fit statistic : Chi-Squared 56.14 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 5.07e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.154e-08 3.710e-09
25- 50 7.991e-08 8.255e-09
50-150 1.752e-07 5.380e-08
15-150 2.967e-07 5.380e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.60272 (-1.79556 1.91909)
R1^2/D10^2 : 3.54485 (-1.79993 5.82587)
kT2 [keV] : 31.1380 (-8.18185 20.6688)
R2^2/D10^2 : 2.71607E-02 (-0.0213312 0.0541327)
------------------------------------------------------------
#Fit statistic : Chi-Squared 58.49 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 3.49e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.961e-08 1.002e-08
25- 50 8.210e-08 1.772e-08
50-150 1.826e-07 8.856e-08
15-150 3.043e-07 9.695e-08
Plot creation:
Wed Nov 4 20:06:15 EST 2020