batgrbproduct analysis for trigger=1004239
batgrbproduct Analysis for Trigger=1004239
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 Nov 6 12:55:35 EST 2020
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger1004239/GCN5_download_cron
======================================================================
Trigger: 01004239 Segment: 000
BAT Trigger Time: 626247096.32 [s; MET]
Trigger Stop: 626247097.344 [s; MET]
UTC: 2020-11-05T05:31:10.392500 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 245.626275813377 Dec: 12.7301449302437 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 24.04
Image Trigger?: NO
Rate S/N Ratio: 222.506179689464 [ if not an image trigger ]
Image S/N Ratio: 24.04
Flight Position: [ source = BAT ]
RA: 245.626275813377 Dec: 12.7301449302437 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 245.610000254488 Dec: 12.7342813274895 [deg; J2000]
{ 16h 22m 26.4s , +12d 44' 03.4" }
+/- 0.617046361502483 [arcmin] (estimated 90% radius based on SNR)
+/- 0.146831597641778 [arcmin] (formal 1-sigma fit error)
SNR: 60.626763715397
Angular difference between Flight and Ground position is 0.984323 arcmin
Partial Coding Fraction: 0.609375 [ including projection effects ]
Duration
T90: 33.8159999847412 +/- 4.03117649902239
Measured from: -0.819999933242798
to: 32.9960000514984 [s; relative to TRIGTIME]
T50: 8.67999994754791 +/- 0.348390522239109
Measured from: 1.29600012302399
to: 9.9760000705719 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.763999938964844
to: 1.76399993896484 [s; relative to TRIGTIME]
Total Fluence
Measured from: -2.85199999809265
to: 72.107999920845 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 3.203225 5.719836 5.911234 1.897255
0.073155 0.081594 0.079331 0.068530 [error]
Peak 0.313496 0.569134 0.704748 0.237736
0.013280 0.017120 0.019173 0.014977 [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 9.89e-07 2.35e-06 4.43e-06 2.03e-05 1.20e-05 2.81e-05 erg/cm2
Error 4.16e-08 5.74e-08 8.68e-08 9.68e-07 2.27e-07 9.92e-07 erg/cm2
Peak flux Power-law 2.82e+00 4.05e+00 4.34e+00 8.63e+00 1.39e+01 1.98e+01 ph/cm2/s
Error 1.93e-01 1.66e-01 1.51e-01 6.71e-01 4.51e-01 7.47e-01 ph/cm2/s
Fluence Cutoff-PL 9.36e-07 2.36e-06 4.52e-06 1.64e-05 1.19e-05 2.42e-05 erg/cm2
Error 5.71e-08 5.90e-08 1.10e-07 2.65e-06 2.39e-07 2.63e-06 erg/cm2
Peak flux Cutoff-PL 2.59e+00 4.09e+00 4.49e+00 6.60e+00 1.37e+01 1.78e+01 ph/cm2/s
Error 2.59e-01 1.73e-01 1.97e-01 1.48e+00 4.69e-01 1.55e+00 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 1.083 0.035 - - 1.53e-02 2.89e-04 41.600 0
CPL 0.903 0.142 373.9 385.0 1.81e-02 2.40e-03 36.710 0
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.902 0.058 - - 1.21e-01 3.92e-03 47.130 0
CPL 0.622 0.239 296.1 548.4 1.59e-01 3.63e-02 42.910 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: 28.992000 sec.
T50 in the 50-300 keV band: 7.296000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 74.960 -2.852 72.108
T90 33.816 -0.820 32.996
T50 8.680 1.296 9.976
Peak 1.000 0.764 1.764
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
245.6100 +12.7343 0.0031 23.2 -102.0 16.6276 60.6 TRIG_01004239
------------------------------------------
Foreground time interval of the image:
-2.852 72.108 (delta_t = 74.960 [sec])
Background time interval of the image:
-239.320 -2.852 (delta_t = 236.468 [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 -2.852 sec. to 72.108 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.08328 ( -0.0347614 0.0346099 )
Norm@50keV : 1.52509E-02 ( -0.000289115 0.000288631 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 41.60 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 9.37e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 74.96 sec: 1.76625 ( -0.0354543 0.0355244 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.20171e-05 ( -2.26957e-07 2.27123e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -2.852 sec. to 72.108 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.902689 ( -0.144035 0.139063 )
Epeak [keV] : 373.920 ( -136.968 633.048 )
Norm@50keV : 1.80753E-02 ( -0.00225517 0.00254678 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 36.71 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 9.78e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 74.96 sec: 1.74514 ( -0.03858 0.03872 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.19329e-05 ( -2.39272e-07 2.38373e-07 ) ergs/cm2
Band function
Time interval is from -2.852 sec. to 72.108 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.208791 ( -1.68131 3.10897 )
beta : -1.12836 ( 1.1151 0.0430523 )
Epeak [keV] : 74.8032 ( -40.5699 180.328 )
Norm@50keV : 4.97778E-02 ( -0.0288217 55.1499 )
------------------------------------------------------------
Photon flux (15-150 keV) in 74.96 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] : 22.8045 ( )
R^2/D10^2 : 5.42739E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 471.86 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.21e-66 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.850e-07 1.585e-08
25- 50 2.079e-06 6.297e-08
50-150 8.077e-06 2.249e-07
15-150 1.054e-05 2.211e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 7.65542 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared 608.02 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 3.41e-93 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.429e-06 2.998e-08
25- 50 2.749e-06 5.510e-08
50-150 6.029e-06 1.151e-07
15-150 1.021e-05 2.024e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.94966 (-0.790185 0.861245)
R1^2/D10^2 : 0.587826 (-0.141044 0.19783)
kT2 [keV] : 35.9543 (-2.70766 3.52899)
R2^2/D10^2 : 1.10348E-02 (-0.00284141 0.00321738)
------------------------------------------------------------
#Fit statistic : Chi-Squared 39.91 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 9.37e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.339e-07 6.117e-08
25- 50 2.424e-06 1.004e-07
50-150 8.704e-06 3.823e-07
15-150 1.196e-05 4.460e-07
Peak spectrum fit
Power-law model
Time interval is from 0.764 sec. to 1.764 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.901935 ( -0.0579219 0.0576737 )
Norm@50keV : 0.120951 ( -0.00391938 0.00391215 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 47.13 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.21e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 13.8827 ( -0.450585 0.450807 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.35638e-06 ( -4.84887e-08 4.85906e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.764 sec. to 1.764 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.621898 ( -0.246028 0.231469 )
Epeak [keV] : 296.105 ( -109.754 987.014 )
Norm@50keV : 0.159006 ( -0.0309276 0.0417026 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 42.91 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 9.00e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 13.7218 ( -0.4687 0.4689 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.34286e-06 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.764 sec. to 1.764 sec.
Parameter 2 is pegged at -8.80351 due to zero or negative pivot element, likely
caused by the fit being insensitive to the parameter.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.819068 ( 0.819068 0.819068 )
beta : -0.901940 ( -0.0576669 0.0579342 )
Epeak [keV] : 20.6601 ( )
Norm@50keV : 0.176209 ( )
------------------------------------------------------------
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] : 23.9054 ( )
R^2/D10^2 : 0.397518 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 161.17 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 6.97e-12 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.039e-08 2.555e-09
25- 50 2.238e-07 1.050e-08
50-150 9.533e-07 4.930e-08
15-150 1.217e-06 5.250e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 54.6191 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared 370.61 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.59e-47 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.360e-07 5.000e-09
25- 50 2.616e-07 9.150e-09
50-150 5.738e-07 1.970e-08
15-150 9.714e-07 3.505e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.35036 (-1.2878 1.59185)
R1^2/D10^2 : 6.69170 (-3.04224 6.33892)
kT2 [keV] : 32.6104 (-2.95944 4.21439)
R2^2/D10^2 : 0.139528 (-0.044843 0.0496883)
------------------------------------------------------------
#Fit statistic : Chi-Squared 43.33 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.72e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.295e-08 1.572e-08
25- 50 2.319e-07 2.140e-08
50-150 1.034e-06 7.510e-08
15-150 1.349e-06 1.045e-07
Plot creation:
Fri Nov 6 13:07:11 EST 2020