batgrbproduct analysis for trigger=1001514
batgrbproduct Analysis for Trigger=1001514
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): Sun Oct 25 18:20:46 EDT 2020
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger1001514/GCN5_download_cron
======================================================================
Trigger: 01001514 Segment: 000
BAT Trigger Time: 625200564.992 [s; MET]
Trigger Stop: 625200565.504 [s; MET]
UTC: 2020-10-24T02:48:59.133580 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 125.947616961099 Dec: 3.37711306985024 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.01
Image Trigger?: NO
Rate S/N Ratio: 15.6204993518133 [ if not an image trigger ]
Image S/N Ratio: 9.01
Flight Position: [ source = BAT ]
RA: 125.947616961099 Dec: 3.37711306985024 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 125.959494089901 Dec: 3.3568279686495 [deg; J2000]
{ 08h 23m 50.3s , +03d 21' 24.6" }
+/- 1.59559423163412 [arcmin] (estimated 90% radius based on SNR)
+/- 0.672864999582623 [arcmin] (formal 1-sigma fit error)
SNR: 15.6037561561612
Angular difference between Flight and Ground position is 1.409764 arcmin
Partial Coding Fraction: 0.2207031 [ including projection effects ]
Duration
T90: 5 +/- 2.23606797749979
Measured from: 0.00800013542175293
to: 5.00800013542175 [s; relative to TRIGTIME]
T50: 3 +/- 1
Measured from: 0.00800013542175293
to: 3.00800013542175 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 1.00800001621246
to: 2.00800001621246 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.00800001621246338
to: 6.00800001621246 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.602570 0.586051 0.255292 0.052581
0.047651 0.047594 0.038455 0.031554 [error]
Peak 0.163771 0.154578 0.082654 0.015159
0.021990 0.021406 0.017704 0.013611 [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 1.97e-07 2.51e-07 2.34e-07 3.82e-07 8.11e-07 1.06e-06 erg/cm2
Error 2.70e-08 2.29e-08 3.75e-08 1.23e-07 8.51e-08 1.62e-07 erg/cm2
Peak flux Power-law 1.73e+00 1.21e+00 5.57e-01 3.58e-01 3.67e+00 3.85e+00 ph/cm2/s
Error 3.72e-01 1.80e-01 1.43e-01 1.76e-01 5.50e-01 5.73e-01 ph/cm2/s
Fluence Cutoff-PL 1.98e-07 2.51e-07 2.33e-07 3.76e-07 8.11e-07 1.06e-06 erg/cm2
Error 2.75e-08 2.62e-08 3.74e-08 2.57e-07 8.94e-08 2.27e-07 erg/cm2
Peak flux Cutoff-PL 1.67e+00 1.25e+00 5.62e-01 2.48e-01 3.63e+00 3.73e+00 ph/cm2/s
Error 4.20e-01 2.30e-01 1.51e-01 2.73e-01 5.65e-01 6.46e-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 2.104 0.182 - - 1.46e-02 1.67e-03 58.020 0
CPL 2.249 0.000 110.0 0.0 1.22e-02 0.00e+00 57.960 0
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.120 0.293 - - 2.31e-02 4.49e-03 50.220 0
CPL 1.832 0.808 25.9 -2.6 3.34e-02 8.30e-02 50.020 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: 2.496000 sec.
T50 in the 50-300 keV band: 1.472000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 6.000 0.008 6.008
T90 5.000 0.008 5.008
T50 3.000 0.008 3.008
Peak 1.000 1.008 2.008
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
125.9595 +3.3568 0.0123 35.6 -99.7 1.5343 15.6 TRIG_01001514
------------------------------------------
Foreground time interval of the image:
0.008 6.008 (delta_t = 6.000 [sec])
Background time interval of the image:
-239.992 -125.132 (delta_t = 114.860 [sec])
-123.992 0.008 (delta_t = 124.000 [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 0.008 sec. to 6.008 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.10380 ( -0.177215 0.18656 )
Norm@50keV : 1.45502E-02 ( -0.00169441 0.00165097 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 58.02 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 4.38e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 6 sec: 2.29342 ( -0.213408 0.213823 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.11422e-07 ( -8.45892e-08 8.56212e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.008 sec. to 6.008 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.24862 ( -1.99353 -1.99353 )
Epeak [keV] : 109.980 ( )
Norm@50keV : 1.21909E-02 ( )
------------------------------------------------------------
#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 6 sec: 2.29383 ( -0.21481 0.21146 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.10678e-07 ( -9.3042e-08 8.5758e-08 ) ergs/cm2
Band function
Time interval is from 0.008 sec. to 6.008 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.84545 ( 1.8459 1.8459 )
beta : -2.10365 ( 2.10376 0.177233 )
Epeak [keV] : 7.48347 ( -7.30051 -7.30051 )
Norm@50keV : 2.69377E-02 ( -0.0130357 0.103997 )
------------------------------------------------------------
Photon flux (15-150 keV) in 6 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] : 9.79130 (-1.03605 1.15585)
R^2/D10^2 : 1.11058 (-0.395124 0.615259)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 88.94 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 4.33e-03 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.291e-07 2.238e-08
25- 50 3.115e-07 3.246e-08
50-150 1.529e-07 3.882e-08
15-150 5.935e-07 6.648e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 60.4966 (-14.8026 22.403)
Norm : 11.7711 (-1.85438 2.15806)
------------------------------------------------------------
#Fit statistic : Chi-Squared 61.25 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 3.26e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.777e-07 2.199e-08
25- 50 2.712e-07 2.820e-08
50-150 3.107e-07 6.354e-08
15-150 7.596e-07 9.660e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.21182 (-2.24942 3.72301)
R1^2/D10^2 : 9.33220 (-7.69865 18.1709)
kT2 [keV] : 17.9418 (-6.46729 85.871)
R2^2/D10^2 : 7.52454E-02 (-0.0733366 0.152704)
------------------------------------------------------------
#Fit statistic : Chi-Squared 64.28 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.83e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.925e-07 9.390e-08
25- 50 2.480e-07 1.016e-07
50-150 3.060e-07 1.701e-07
15-150 7.465e-07 3.016e-07
Peak spectrum fit
Power-law model
Time interval is from 1.008 sec. to 2.008 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.11970 ( -0.277251 0.308315 )
Norm@50keV : 2.30891E-02 ( -0.00458569 0.00438721 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 50.22 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 7.25e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 3.66825 ( -0.549539 0.550069 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.1495e-07 ( -3.73662e-08 3.81206e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.008 sec. to 2.008 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.83201 ( -1.31943 0.296467 )
Epeak [keV] : 25.8985 ( -20.6106 -25.8895 )
Norm@50keV : 3.34261E-02 ( -0.0180559 0.148041 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 50.02 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 6.99e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 3.63151 ( -0.56831 0.56232 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.10862e-07 ( -3.9817e-08 4.0815e-08 ) ergs/cm2
Band function
Time interval is from 1.008 sec. to 2.008 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.87172 ( -0.875198 1.13693 )
beta : -9.37167 ( 9.37167 19.3717 )
Epeak [keV] : 24.0465 ( -13.3442 -13.3442 )
Norm@50keV : 3.14560E-02 ( -0.00724662 0.0326119 )
------------------------------------------------------------
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 4.48757e-14 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.3146 (-1.72802 2.00919)
R^2/D10^2 : 1.49027 (-0.743283 1.52379)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 61.37 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 3.22e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.261e-08 9.125e-09
25- 50 8.465e-08 1.936e-08
50-150 4.829e-08 1.668e-08
15-150 1.656e-07 3.670e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 60.4118 (-20.8388 39.2701)
Norm : 19.0278 (-4.37015 5.72736)
------------------------------------------------------------
#Fit statistic : Chi-Squared 50.55 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 7.14e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.787e-08 9.770e-09
25- 50 7.302e-08 1.332e-08
50-150 8.355e-08 2.974e-08
15-150 2.045e-07 4.595e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.52372 (-1.18835 2.63356)
R1^2/D10^2 : 536.037 (-523.266 103762)
kT2 [keV] : 12.9604 (-2.65588 5.2704)
R2^2/D10^2 : 0.547073 (-0.422501 0.477157)
------------------------------------------------------------
#Fit statistic : Chi-Squared 48.97 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 7.03e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.097e-08 2.439e-08
25- 50 6.931e-08 2.877e-08
50-150 7.092e-08 3.637e-08
15-150 1.912e-07 8.178e-08
Plot creation:
Sun Oct 25 18:23:41 EDT 2020