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: Mon Jan 20 10:15:36 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger277356
======================================================================
Trigger: 00277356 Segment: 000
BAT Trigger Time: 199355470.848 [s; MET]
Trigger Stop: 199355471.872 [s; MET]
UTC: 2007-04-27T08:31:08.930660 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 28.8618505141047 Dec: -27.6329554026753 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.85
Image Trigger?: NO
Rate S/N Ratio: 11.7898261225516 [ if not an image trigger ]
Image S/N Ratio: 8.85
Analysis Position: [ source = BAT ]
RA: 28.8618505141047 Dec: -27.6329554026753 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 28.8777179976176 Dec: -27.6052179084872 [deg; J2000]
{ 01h 55m 30.7s , -27d 36' 18.8" }
+/- 0.790441294511867 [arcmin] (estimated 90% radius based on SNR)
+/- 0.255605754152814 [arcmin] (formal 1-sigma fit error)
SNR: 42.5616956449078
Angular difference between the analysis and refined position is 1.865831 arcmin
Partial Coding Fraction: 1 [ including projection effects ]
Duration
T90: 11.080000013113 +/- 0.972084349357335
Measured from: 0.640000015497208
to: 11.7200000286102 [s; relative to TRIGTIME]
T50: 5.69999998807907 +/- 0.545134811791544
Measured from: 3.18400001525879
to: 8.88400000333786 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 6.80000001192093
to: 7.80000001192093 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.179999977350235
to: 13.688000023365 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.537560 0.568346 0.275411 0.042834
0.018129 0.018940 0.016252 0.013665 [error]
Peak 0.057763 0.067630 0.030867 0.005396
0.005109 0.005421 0.004602 0.003780 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 13.868 -0.180 13.688
T90 11.080 0.640 11.720
T50 5.700 3.184 8.884
Peak 1.000 6.800 7.800
====== 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 -2.034 -0.087 0.086 - - - 5.71e-03 -2.96e-04 2.94e-04 57.800 57
CPL -1.512 -0.355 0.393 40.035 -12.242 9.196 1.12e-02 -4.02e-03 7.28e-03 51.200 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 -1.925 -0.181 0.173 - - - 9.12e-03 -1.11e-03 1.09e-03 43.210 57
CPL -1.045 -0.789 1.013 44.065 -10.985 36.708 3.00e-02 -3.00e-02 9.10e-02 39.520 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 1.67e-07 2.22e-07 2.17e-07 3.80e-07 7.31e-07 9.87e-07 erg/cm2
90%_error_low -1.14e-08 -9.59e-09 -1.57e-08 -5.35e-08 -3.55e-08 -6.93e-08 erg/cm2
90%_error_hi 1.16e-08 9.59e-09 1.58e-08 5.93e-08 3.57e-08 7.36e-08 erg/cm2
Peak flux PL 5.65e-01 4.43e-01 2.33e-01 1.78e-01 1.32e+00 1.42e+00 ph/cm2/s
90%_error_low -7.62e-02 -4.24e-02 -3.68e-02 -4.85e-02 -1.26e-01 -1.38e-01 ph/cm2/s
90%_error_hi 7.81e-02 4.24e-02 3.74e-02 5.87e-02 1.26e-01 1.39e-01 ph/cm2/s
Fluence CPL N/A N/A N/A N/A N/A N/A erg/cm2
90%_error_low -1.14e-08 -9.59e-09 -1.57e-08 -5.35e-08 -3.55e-08 -6.93e-08 erg/cm2
90%_error_hi 1.16e-08 9.59e-09 1.58e-08 5.93e-08 3.57e-08 7.36e-08 erg/cm2
Peak flux CPL 5.24e-01 4.90e-01 2.25e-01 5.58e-02 1.28e+00 1.30e+00 ph/cm2/s
90%_error_low -8.69e-02 -5.94e-02 -4.71e-02 -3.85e-02 -1.31e-01 -1.39e-01 ph/cm2/s
90%_error_hi 8.71e-02 6.24e-02 4.32e-02 1.00e-01 1.31e-01 1.53e-01 ph/cm2/s
======================================================================
Special notes of this burst