Analysis Summary
Notes:
- 1) No attempt has been made to eliminate the non-significant decimal places.
- 2) This batgrbproduct analysis is done using the HEASARC data.
- 3) This batgrbproduct analysis is using the flight position for the mask-weighting calculation.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time: Mon May 20 17:16:22 EDT 2019
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger900285
======================================================================
Trigger: 00900285 Segment: 000
BAT Trigger Time: 577792865.984 [s; MET]
Trigger Stop: 577792867.008 [s; MET]
UTC: 2019-04-24T10:00:43.191560 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 48.6808760446314 Dec: 20.2334856376405 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6.72
Image Trigger?: NO
Rate S/N Ratio: 15.1657508881031 [ if not an image trigger ]
Image S/N Ratio: 6.72
Analysis Position: [ source = BAT ]
RA: 48.6808760446314 Dec: 20.2334856376405 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 48.6932555577323 Dec: 20.2413142171866 [deg; J2000]
{ 03h 14m 46.4s , +20d 14' 28.7" }
+/- 1.43103058970632 [arcmin] (estimated 90% radius based on SNR)
+/- 0.552892855010032 [arcmin] (formal 1-sigma fit error)
SNR: 18.2289974335155
Angular difference between the analysis and refined position is 0.840432 arcmin
Partial Coding Fraction: 0.4101562 [ including projection effects ]
Duration
T90: 9.83599996566772 +/- 3.91796534981675
Measured from: -0.804000020027161
to: 9.03199994564056 [s; relative to TRIGTIME]
T50: 5.2960000038147 +/- 0.985397294079381
Measured from: 1.36800003051758
to: 6.66400003433228 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 1.09600007534027
to: 2.09600007534027 [s; relative to TRIGTIME]
Total Fluence
Measured from: -1.31199991703033
to: 14.3680000305176 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.480433 0.720049 0.552130 0.133657
0.049801 0.053556 0.047571 0.038782 [error]
Peak 0.044193 0.093931 0.082831 0.021367
0.012608 0.014186 0.013420 0.011071 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 15.680 -1.312 14.368
T90 9.836 -0.804 9.032
T50 5.296 1.368 6.664
Peak 1.000 1.096 2.096
====== Spectral Analysis Summary =====================================
Model : spectral model: simple power-law (PL) and cutoff power-law (CPL)
Ph_index : photon index: E^{Ph_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 both the PL model and CPL model
Nomr_90err : 90% error of the normalization
chi2 : Chi-Squared
dof : degree of freedo
=== Time-averaged spectral analysis ===
(Best model with acceptable fit: PL)
Model Ph_index Ph_90err_low Ph_90err_hi Epeak Epeak_90err_low Epeak_90err_hi Norm Nomr_90err_low Norm_90err_hi chi2 dof
PL -1.493 -0.142 0.141 - - - 8.12e-03 -6.81e-04 6.78e-04 54.930 57
CPL -1.197 -0.370 0.611 135.409 -61.298 -135.409 1.15e-02 -3.92e-03 1.16e-02 54.090 56
=== 1-s peak spectral analysis ===
(Best model with acceptable fit: PL)
Model Ph_index Ph_90err_low Ph_90err_hi Epeak Epeak_90err_low Epeak_90err_hi Norm Nomr_90err_low Norm_90err_hi chi2 dof
PL -1.100 -0.280 0.290 - - - 1.72e-02 -2.77e-03 2.76e-03 64.350 57
CPL -0.870 N/A N/A 281.263 N/A N/A 2.19e-02 N/A N/A 64.320 56
=== 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 PL 1.62e-07 2.98e-07 4.24e-07 1.27e-06 1.21e-06 2.15e-06 erg/cm2
90%_error_low -2.22e-08 -2.57e-08 -4.57e-08 -2.68e-07 -1.10e-07 -3.08e-07 erg/cm2
90%_error_hi 2.30e-08 2.56e-08 4.54e-08 3.13e-07 1.11e-07 3.44e-07 erg/cm2
Peak flux PL 4.84e-01 6.19e-01 5.78e-01 9.48e-01 2.00e+00 2.63e+00 ph/cm2/s
90%_error_low -1.50e-01 -1.25e-01 -1.03e-01 -3.19e-01 -3.31e-01 -4.41e-01 ph/cm2/s
90%_error_hi 1.67e-01 1.21e-01 1.01e-01 4.12e-01 3.33e-01 4.55e-01 ph/cm2/s
Fluence CPL 1.54e-07 3.08e-07 4.32e-07 8.07e-07 1.18e-06 1.70e-06 erg/cm2
90%_error_low -2.61e-08 -3.13e-08 -4.90e-08 -4.34e-07 -1.22e-07 -4.47e-07 erg/cm2
90%_error_hi 2.65e-08 3.23e-08 5.00e-08 5.91e-07 1.21e-07 5.75e-07 erg/cm2
Peak flux CPL 4.68e-01 6.24e-01 5.87e-01 8.25e-01 1.99e+00 2.50e+00 ph/cm2/s
90%_error_low -1.86e-01 -1.28e-01 -1.10e-01 -5.06e-01 -3.40e-01 -6.44e-01 ph/cm2/s
90%_error_hi 1.50e-01 1.31e-01 1.25e-01 3.56e-01 3.25e-01 5.44e-01 ph/cm2/s
======================================================================
Special notes of this burst