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: Wed Jan 22 16:43:47 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger208275
======================================================================
Trigger: 00208275 Segment: 000
BAT Trigger Time: 168283482.204 [s; MET]
Trigger Stop: 168283482.268 [s; MET]
UTC: 2006-05-02T17:24:41.035100 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 278.935719107924 Dec: 52.6321691479945 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 11.47
Image Trigger?: NO
Rate S/N Ratio: 32.9696830436691 [ if not an image trigger ]
Image S/N Ratio: 11.47
Analysis Position: [ source = BAT ]
RA: 278.935719107924 Dec: 52.6321691479945 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 278.961492631607 Dec: 52.6269420502663 [deg; J2000]
{ 18h 35m 50.8s , +52d 37' 37.0" }
+/- 1.75428350816523 [arcmin] (estimated 90% radius based on SNR)
+/- 0.708716180793054 [arcmin] (formal 1-sigma fit error)
SNR: 13.6271302706973
Angular difference between the analysis and refined position is 0.989630 arcmin
Partial Coding Fraction: 0.921875 [ including projection effects ]
Duration
T90: 0.143999993801117 +/- 0.0505964225831327
Measured from: -0.00400000810623169
to: 0.139999985694885 [s; relative to TRIGTIME]
T50: 0.0479999780654907 +/- 0.0160000026226044
Measured from: 0.0119999945163727
to: 0.0599999725818634 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.407999992370605
to: 0.592000007629395 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.00400000810623169
to: 0.171999990940094 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.009132 0.023403 0.026429 0.008236
0.002475 0.002833 0.002766 0.002246 [error]
Peak 0.011024 0.022911 0.032944 0.017131
0.005164 0.005578 0.004995 0.004490 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 0.176 -0.004 0.172
T90 0.144 -0.004 0.140
T50 0.048 0.012 0.060
Peak 1.000 -0.408 0.592
====== 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 -0.985 -0.198 0.205 - - - 2.57e-02 -3.14e-03 3.14e-03 56.960 57
CPL -0.105 -0.887 1.178 117.949 -39.490 -117.949 6.62e-02 -4.08e-02 1.57e-01 54.260 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 -0.815 -0.342 0.379 - - - 5.35e-03 -1.12e-03 1.09e-03 65.160 57
CPL -0.401 -0.696 2.105 231.430 -231.430 -231.430 8.01e-03 -3.64e-03 4.71e-02 64.940 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 3.57e-09 9.01e-09 1.82e-08 9.26e-08 4.92e-08 1.23e-07 erg/cm2
90%_error_low -8.16e-10 -1.32e-09 -2.45e-09 -2.47e-08 -6.45e-09 -2.65e-08 erg/cm2
90%_error_hi 8.75e-10 1.30e-09 2.43e-09 3.05e-08 6.49e-09 3.14e-08 erg/cm2
Peak flux PL 1.15e-01 1.74e-01 1.98e-01 4.29e-01 6.15e-01 9.15e-01 ph/cm2/s
90%_error_low -4.73e-02 -4.84e-02 -3.89e-02 -1.61e-01 -1.24e-01 -1.91e-01 ph/cm2/s
90%_error_hi 5.63e-02 4.73e-02 3.86e-02 2.24e-01 1.25e-01 2.11e-01 ph/cm2/s
Fluence CPL 2.96e-09 9.72e-09 1.98e-08 3.18e-08 4.67e-08 6.43e-08 erg/cm2
90%_error_low -1.00e-09 -1.56e-09 -2.96e-09 -1.95e-08 -7.27e-09 -2.03e-08 erg/cm2
90%_error_hi 1.06e-09 1.63e-09 3.05e-09 6.23e-08 7.12e-09 6.03e-08 erg/cm2
Peak flux CPL 1.01e-01 1.76e-01 2.08e-01 2.88e-01 6.04e-01 7.74e-01 ph/cm2/s
90%_error_low -6.09e-02 -5.12e-02 -4.66e-02 -2.88e-01 -1.31e-01 -2.64e-01 ph/cm2/s
90%_error_hi 6.65e-02 5.17e-02 5.32e-02 1.92e-01 1.28e-01 2.87e-01 ph/cm2/s
======================================================================
Special notes of this burst