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: Mon Aug 6 18:43:57 EDT 2018
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger845443
======================================================================
Trigger: 00845443 Segment: 000
BAT Trigger Time: 552049932.992 [s; MET]
Trigger Stop: 552049934.016 [s; MET]
UTC: 2018-06-30T11:11:51.803800 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 48.8102458660383 Dec: -87.4820175920548 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.75
Image Trigger?: NO
Rate S/N Ratio: 11.5325625946708 [ if not an image trigger ]
Image S/N Ratio: 7.75
Analysis Position: [ source = BAT ]
RA: 48.8102458660383 Dec: -87.4820175920548 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 48.8950051312293 Dec: -87.4763190297174 [deg; J2000]
{ 03h 15m 34.8s , -87d 28' 34.7" }
+/- 0.832275135976513 [arcmin] (estimated 90% radius based on SNR)
+/- 0.275560673586536 [arcmin] (formal 1-sigma fit error)
SNR: 39.5387358224932
Angular difference between the analysis and refined position is 0.408578 arcmin
Partial Coding Fraction: 0.59375 [ including projection effects ]
Duration
T90: 18.9599999189377 +/- 6.31456244704634
Measured from: 1.4760000705719
to: 20.4359999895096 [s; relative to TRIGTIME]
T50: 3.23199987411499 +/- 0.616077994623238
Measured from: 3.58800005912781
to: 6.8199999332428 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 3.64800000190735
to: 4.64800000190735 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.355999946594238
to: 30.0240000486374 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.209199 1.192761 0.639399 0.113584
0.049089 0.049016 0.041018 0.034206 [error]
Peak 0.267200 0.268470 0.145049 0.028724
0.012747 0.013071 0.010362 0.007576 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 30.380 -0.356 30.024
T90 18.960 1.476 20.436
T50 3.232 3.588 6.820
Peak 1.000 3.648 4.648
====== 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 -2.061 -0.099 0.097 - - - 6.23e-03 -3.64e-04 3.60e-04 34.420 57
CPL -2.057 -0.136 0.626 9999.360 -9992.955 -9999.360 6.25e-03 -8.45e-04 7.31e-03 34.430 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 -2.020 -0.109 0.107 - - - 4.31e-02 -2.79e-03 2.76e-03 47.970 57
CPL -2.070 -0.177 0.387 63.938 N/A N/A 4.05e-02 N/A N/A 47.910 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 4.10e-07 5.37e-07 5.14e-07 8.76e-07 1.75e-06 2.34e-06 erg/cm2
90%_error_low -3.24e-08 -2.66e-08 -4.15e-08 -1.38e-07 -9.49e-08 -1.79e-07 erg/cm2
90%_error_hi 3.32e-08 2.66e-08 4.17e-08 1.54e-07 9.55e-08 1.91e-07 erg/cm2
Peak flux PL 2.93e+00 2.17e+00 1.07e+00 7.51e-01 6.53e+00 6.92e+00 ph/cm2/s
90%_error_low -2.66e-01 -1.23e-01 -9.17e-02 -1.21e-01 -3.84e-01 -3.89e-01 ph/cm2/s
90%_error_hi 2.72e-01 1.23e-01 9.16e-02 1.34e-01 3.85e-01 3.90e-01 ph/cm2/s
Fluence CPL N/A N/A N/A N/A N/A N/A erg/cm2
90%_error_low -3.24e-08 -2.66e-08 -4.15e-08 -1.38e-07 -9.49e-08 -1.79e-07 erg/cm2
90%_error_hi 3.32e-08 2.66e-08 4.17e-08 1.54e-07 9.55e-08 1.91e-07 erg/cm2
Peak flux CPL 2.91e+00 2.16e+00 1.07e+00 7.72e-01 6.48e+00 6.90e+00 ph/cm2/s
90%_error_low -2.37e-01 N/A -3.28e-01 -1.09e-01 -3.36e-01 -3.87e-01 ph/cm2/s
90%_error_hi 2.28e-01 N/A 9.27e-02 1.89e-01 4.08e-01 3.94e-01 ph/cm2/s
======================================================================
Special notes of this burst