Special note:
This burst occurred only 755 s after trigger 770957. No event data are collected close to T0. The cloeset event data collected are before T0-95 s and after T0+929 s. Therefore, the only BAT analysis available are burst duration based on the BAT raw light curve.
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 v2.46
Process Start Time (local time): Wed Sep 6 17:17:06 EDT 2017
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger770958
======================================================================
Trigger: 00770958 Segment: 000
BAT Trigger Time: 526352165.376 [s; MET]
Trigger Stop: 526352166.414 [s; MET]
UTC: 2017-09-06T00:55:45.734600 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 232.221 Dec: -28.251 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 20.76
Image Trigger?: NO
Rate S/N Ratio: 77.03 [ if not an image trigger ]
Image S/N Ratio: 20.76
Flight Position: [ source = BAT ]
RA: 232.221 Dec: -28.251 [deg; J2000]
Duration
T90: 19.20 +/- 1.6
Measured from: -11.776
to: 7.424 [s; relative to TRIGTIME]
T50: 9.60 +/- 1.6
Measured from: -6.976
to: 2.624 [s; relative to TRIGTIME]
====== Table of the duration information =============================
Value tstart tstop
T100 19.200 -11.776 7.424
T90 19.200 -11.776 7.424
T50 9.600 -6.976 2.624
Peak 0.999 -0.275 0.724
====== 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: N/A)
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 N/A N/A N/A - - - N/A N/A N/A N/A N/A
CPL N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
=== 1-s peak spectral analysis ===
(Best model with acceptable fit: N/A)
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 N/A N/A N/A - - - N/A N/A N/A N/A N/A
CPL N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
=== 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 N/A N/A N/A N/A N/A N/A erg/cm2
Light Curves
Best duration plot
Note: The mask-weighted lightcurves have units of either count/det or counts/sec/det, where a det is 0.4 x 0.4 = 0.16 sq cm.
Full-time range; 1 s binning