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: Sat May 9 19:28:51 EDT 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger276321
======================================================================
Trigger: 00276321 Segment: 000
BAT Trigger Time: 198742695.424 [s; MET]
Trigger Stop: 198742697.472 [s; MET]
UTC: 2007-04-20T06:18:13.522060 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 121.252999205293 Dec: -45.5608340567608 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.94
Image Trigger?: NO
Rate S/N Ratio: 23.9374184071716 [ if not an image trigger ]
Image S/N Ratio: 10.94
Analysis Position: [ source = BAT ]
RA: 121.252999205293 Dec: -45.5608340567608 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 121.245009841409 Dec: -45.5633398546012 [deg; J2000]
{ 08h 04m 58.8s , -45d 33' 48.0" }
+/- 0.966693095300314 [arcmin] (estimated 90% radius based on SNR)
+/- 0.375880054179613 [arcmin] (formal 1-sigma fit error)
SNR: 31.9252746370189
Angular difference between the analysis and refined position is 0.367756 arcmin
Partial Coding Fraction: 0.08398438 [ including projection effects ]
Duration
T90: 77.0240000188351 +/- 5.46696844651107
Measured from: -23.2039999961853
to: 53.8200000226498 [s; relative to TRIGTIME]
T50: 19.3120000064373 +/- 1.82200331459623
Measured from: -5.5799999833107
to: 13.7320000231266 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 1.4040000140667
to: 2.4040000140667 [s; relative to TRIGTIME]
Total Fluence
Measured from: -29.136000007391
to: 100.275999993086 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 4.598422 7.582140 6.632324 1.688097
0.163760 0.181227 0.164579 0.133979 [error]
Peak 0.166879 0.287835 0.270190 0.099243
0.022818 0.028462 0.026255 0.019215 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 129.412 -29.136 100.276
T90 77.024 -23.204 53.820
T50 19.312 -5.580 13.732
Peak 1.000 1.404 2.404
====== 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 -1.507 -0.051 0.051 - - - 1.18e-02 -3.33e-04 3.32e-04 53.740 57
CPL -1.132 -0.207 0.217 130.335 -28.096 87.445 1.74e-02 -3.28e-03 4.25e-03 43.910 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 -1.395 -0.169 0.169 - - - 5.80e-02 -5.87e-03 5.86e-03 50.820 57
CPL -1.009 -0.471 0.761 138.510 N/A N/A 8.89e-02 N/A N/A 49.850 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 1.96e-06 3.59e-06 5.05e-06 1.49e-05 1.45e-05 2.55e-05 erg/cm2
90%_error_low -1.08e-07 -1.19e-07 -1.69e-07 -1.10e-06 -4.22e-07 -1.19e-06 erg/cm2
90%_error_hi 1.11e-07 1.18e-07 1.69e-07 1.15e-06 4.23e-07 1.24e-06 erg/cm2
Peak flux PL 2.16e+00 2.31e+00 1.76e+00 2.18e+00 7.06e+00 8.42e+00 ph/cm2/s
90%_error_low -3.84e-01 -2.65e-01 -2.11e-01 -4.94e-01 -7.41e-01 -8.58e-01 ph/cm2/s
90%_error_hi 4.06e-01 2.62e-01 2.09e-01 5.70e-01 7.42e-01 8.62e-01 ph/cm2/s
Fluence CPL 1.78e-06 3.67e-06 5.24e-06 9.53e-06 1.42e-05 2.02e-05 erg/cm2
90%_error_low -1.39e-07 -1.29e-07 -1.99e-07 -1.96e-06 -4.51e-07 -1.99e-06 erg/cm2
90%_error_hi 1.43e-07 1.29e-07 2.01e-07 2.60e-06 4.50e-07 2.59e-06 erg/cm2
Peak flux CPL 1.99e+00 2.39e+00 1.84e+00 1.49e+00 6.97e+00 7.71e+00 ph/cm2/s
90%_error_low -4.74e-01 -2.97e-01 -2.53e-01 -7.04e-01 -7.60e-01 -1.08e+00 ph/cm2/s
90%_error_hi 4.78e-01 3.06e-01 2.59e-01 8.83e-01 7.60e-01 1.24e+00 ph/cm2/s
======================================================================
Special notes of this burst