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.
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BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time: Fri Oct 19 18:44:01 EDT 2018
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger852903
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Trigger: 00852903 Segment: 000
BAT Trigger Time: 555754971.648 [s; MET]
Trigger Stop: 555754973.696 [s; MET]
UTC: 2018-08-12T08:22:30.233000 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 245.885624105366 Dec: 74.6697837972354 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.57
Image Trigger?: NO
Rate S/N Ratio: 11.2249721603218 [ if not an image trigger ]
Image S/N Ratio: 7.57
Analysis Position: [ source = BAT ]
RA: 245.885624105366 Dec: 74.6697837972354 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 245.831368581864 Dec: 74.6685742511222 [deg; J2000]
{ 16h 23m 19.5s , +74d 40' 06.9" }
+/- 2.26589837941564 [arcmin] (estimated 90% radius based on SNR)
+/- 1.3777879542677 [arcmin] (formal 1-sigma fit error)
SNR: 9.45435821307488
Angular difference between the analysis and refined position is 0.863737 arcmin
Partial Coding Fraction: 0.2617188 [ including projection effects ]
Duration
T90: 16.527999997139 +/- 0.970154591757242
Measured from: -0.0880000591278076
to: 16.4399999380112 [s; relative to TRIGTIME]
T50: 13.663999915123 +/- 6.0850797955308
Measured from: 1.24000000953674
to: 14.9039999246597 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 15.62399995327
to: 16.62399995327 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.840000033378601
to: 16.6280000209808 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.178123 0.429186 0.324501 0.109422
0.057951 0.061071 0.055662 0.052230 [error]
Peak 0.046360 0.093747 0.056042 0.032646
0.015625 0.016160 0.015621 0.012653 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
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====== Table of the duration information =============================
Value tstart tstop
T100 17.468 -0.840 16.628
T90 16.528 -0.088 16.440
T50 13.664 1.240 14.904
Peak 1.000 15.624 16.624
====== 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 -1.237 -0.267 0.274 - - - 4.59e-03 -7.17e-04 7.17e-04 58.920 57
CPL -0.489 -0.949 1.739 106.886 N/A N/A 1.05e-02 N/A N/A 57.910 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 -1.303 -0.355 0.361 - - - 1.53e-02 -3.32e-03 3.32e-03 61.520 57
CPL -0.453 -1.864 2.731 91.702 N/A N/A 4.12e-02 N/A N/A 60.750 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 8.02e-08 1.73e-07 2.94e-07 1.14e-06 8.06e-07 1.69e-06 erg/cm2
90%_error_low -2.28e-08 -3.15e-08 -5.40e-08 -4.02e-07 -1.36e-07 -4.45e-07 erg/cm2
90%_error_hi 2.49e-08 3.08e-08 5.33e-08 5.36e-07 1.37e-07 5.57e-07 erg/cm2
Peak flux PL 5.22e-01 5.91e-01 4.79e-01 6.47e-01 1.83e+00 2.24e+00 ph/cm2/s
90%_error_low -1.91e-01 -1.47e-01 -1.21e-01 -2.80e-01 -4.08e-01 -4.95e-01 ph/cm2/s
90%_error_hi 2.14e-01 1.44e-01 1.19e-01 3.83e-01 4.10e-01 5.03e-01 ph/cm2/s
Fluence CPL 6.88e-08 1.85e-07 3.11e-07 4.41e-07 7.66e-07 1.01e-06 erg/cm2
90%_error_low -2.91e-08 -3.71e-08 -6.18e-08 -3.33e-07 -1.63e-07 -3.66e-07 erg/cm2
90%_error_hi 3.08e-08 3.96e-08 6.42e-08 8.41e-07 1.54e-07 1.14e-06 erg/cm2
Peak flux CPL 4.50e-01 6.43e-01 5.15e-01 2.74e-01 1.78e+00 1.88e+00 ph/cm2/s
90%_error_low -2.30e-01 -1.76e-01 -1.40e-01 -2.74e-01 -4.28e-01 -5.14e-01 ph/cm2/s
90%_error_hi 2.52e-01 1.99e-01 1.48e-01 4.99e-01 4.22e-01 6.69e-01 ph/cm2/s
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