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: Thu Sep 28 17:39:39 EDT 2017
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger770981
======================================================================
Trigger: 00770981 Segment: 000
BAT Trigger Time: 526375597.248 [s; MET]
Trigger Stop: 526375598.272 [s; MET]
UTC: 2017-09-06T07:26:17.605220 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 128.703619534125 Dec: 70.7817005714058 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 11.09
Image Trigger?: NO
Rate S/N Ratio: 21.1187120819429 [ if not an image trigger ]
Image S/N Ratio: 11.09
Analysis Position: [ source = BAT ]
RA: 128.703619534125 Dec: 70.7817005714058 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 128.669502283292 Dec: 70.804276145787 [deg; J2000]
{ 08h 34m 40.7s , +70d 48' 15.4" }
+/- 0.751874977030309 [arcmin] (estimated 90% radius based on SNR)
+/- 0.215075986987955 [arcmin] (formal 1-sigma fit error)
SNR: 45.7144177058612
Angular difference between the analysis and refined position is 1.512707 arcmin
Partial Coding Fraction: 0.328125 [ including projection effects ]
Duration
T90: 45.0759999752045 +/- 4.80024419382997
Measured from: -25.7840000391006
to: 19.2919999361038 [s; relative to TRIGTIME]
T50: 12.6159999370575 +/- 0.9888012956279
Measured from: -3.28000003099442
to: 9.33599990606308 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 6.17599999904633
to: 7.17599999904633 [s; relative to TRIGTIME]
Total Fluence
Measured from: -35.2080000042915
to: 41.3279999494553 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 3.639321 5.061694 3.903203 0.866434
0.109002 0.116378 0.102086 0.079517 [error]
Peak 0.143948 0.287148 0.324975 0.096604
0.016096 0.018423 0.018808 0.013174 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 76.536 -35.208 41.328
T90 45.076 -25.784 19.292
T50 12.616 -3.280 9.336
Peak 1.000 6.176 7.176
====== 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: CPL)
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 -1.669 -0.052 0.052 - - - 1.26e-02 -3.58e-04 3.58e-04 58.460 57
CPL -1.277 -0.215 0.225 101.244 -18.425 54.615 1.91e-02 -3.80e-03 5.01e-03 48.440 56
=== 1-s peak spectral analysis ===
(Best model with acceptable fit: CPL)
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 -1.160 -0.105 0.106 - - - 6.19e-02 -4.08e-03 4.08e-03 63.000 57
CPL -0.358 -0.460 0.516 118.837 -25.544 78.942 1.41e-01 -5.16e-02 9.20e-02 53.460 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 1.45e-06 2.40e-06 3.02e-06 7.57e-06 8.99e-06 1.44e-05 erg/cm2
90%_error_low -7.83e-08 -7.72e-08 -1.06e-07 -5.75e-07 -2.61e-07 -6.40e-07 erg/cm2
90%_error_hi 8.00e-08 7.70e-08 1.05e-07 6.04e-07 2.61e-07 6.62e-07 erg/cm2
Peak flux PL 4.19e-04 4.24e-03 4.65e-02 4.95e+00 2.07e-01 3.76e+00 ph/cm2/s
90%_error_low -2.80e-05 N/A N/A -2.21e-01 N/A N/A ph/cm2/s
90%_error_hi 6.05e-05 N/A N/A 6.76e-01 N/A N/A ph/cm2/s
Fluence CPL 1.32e-06 2.46e-06 3.13e-06 4.73e-06 8.79e-06 1.16e-05 erg/cm2
90%_error_low -1.01e-07 -8.46e-08 -1.22e-07 -1.00e-06 -2.84e-07 -1.04e-06 erg/cm2
90%_error_hi 1.04e-07 8.51e-08 1.23e-07 1.34e-06 2.83e-07 1.35e-06 erg/cm2
Peak flux CPL 1.49e+00 2.37e+00 2.25e+00 1.66e+00 7.05e+00 7.77e+00 ph/cm2/s
90%_error_low -2.84e-01 -2.03e-01 -1.91e-01 -4.77e-01 -5.07e-01 -7.11e-01 ph/cm2/s
90%_error_hi 2.97e-01 2.05e-01 1.95e-01 7.03e-01 5.08e-01 8.38e-01 ph/cm2/s
======================================================================
Special notes of this burst