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.
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BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time: Mon Jan 20 03:20:41 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger307604
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Trigger: 00307604 Segment: 000
BAT Trigger Time: 228110960 [s; MET]
Trigger Stop: 228111024 [s; MET]
UTC: 2008-03-25T04:09:17.332080 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 277.894805295646 Dec: 36.5106329498597 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.46
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.46
Analysis Position: [ source = BAT ]
RA: 277.894805295646 Dec: 36.5106329498597 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 277.903438174341 Dec: 36.5163054322944 [deg; J2000]
{ 18h 31m 36.8s , +36d 30' 58.7" }
+/- 1.92534559797056 [arcmin] (estimated 90% radius based on SNR)
+/- 0.922876322742614 [arcmin] (formal 1-sigma fit error)
SNR: 11.9310148211606
Angular difference between the analysis and refined position is 0.537723 arcmin
Partial Coding Fraction: 0.1083984 [ including projection effects ]
Duration
T90: 166.740000009537 +/- 32.5933250583472
Measured from: -26.944000005722
to: 139.796000003815 [s; relative to TRIGTIME]
T50: 67.6760000288486 +/- 19.1432508107739
Measured from: -4.40000000596046
to: 63.2760000228882 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 43.8000000119209
to: 44.8000000119209 [s; relative to TRIGTIME]
Total Fluence
Measured from: -33.33599999547
to: 170.027999997139 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.973052 2.459153 2.238778 0.462694
0.220480 0.205232 0.180215 0.160362 [error]
Peak 0.067478 0.027181 0.034865 0.040936
0.019997 0.018949 0.016481 0.014405 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
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====== Table of the duration information =============================
Value tstart tstop
T100 203.364 -33.336 170.028
T90 166.740 -26.944 139.796
T50 67.676 -4.400 63.276
Peak 1.000 43.800 44.800
====== 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 -1.560 -0.163 0.162 - - - 2.62e-03 -2.24e-04 2.23e-04 49.620 57
CPL -1.559 -0.162 0.346 9999.350 -9999.350 -9999.350 2.63e-03 -2.63e-03 -1.13e-03 49.630 56
=== 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 -2.527 -2.450 5.035 - - - 7.14e-03 -7.14e-03 5.61e-03 64.310 57
CPL -2.137 -0.838 1.932 65.699 N/A N/A 7.54e-03 N/A N/A 64.190 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 7.20e-07 1.27e-06 1.73e-06 4.84e-06 5.01e-06 8.56e-06 erg/cm2
90%_error_low -1.19e-07 -1.26e-07 -1.85e-07 -1.08e-06 -4.46e-07 -1.20e-06 erg/cm2
90%_error_hi 1.26e-07 1.24e-07 1.82e-07 1.27e-06 4.48e-07 1.35e-06 erg/cm2
Peak flux PL 8.09e-01 4.38e-01 1.49e-01 6.53e-02 1.43e+00 1.46e+00 ph/cm2/s
90%_error_low -8.09e-01 -2.99e-01 -1.49e-01 -6.53e-02 -1.43e+00 -6.41e-01 ph/cm2/s
90%_error_hi 6.51e-01 2.03e-01 2.18e-01 8.99e-01 6.48e-01 6.46e-01 ph/cm2/s
Fluence CPL 7.38e-07 1.28e-06 1.71e-06 5.27e-06 5.04e-06 8.52e-06 erg/cm2
90%_error_low N/A -1.26e-07 N/A -2.24e-06 -4.76e-07 -1.76e-06 erg/cm2
90%_error_hi N/A 1.24e-07 N/A 5.53e-07 4.19e-07 1.30e-06 erg/cm2
Peak flux CPL 8.30e-01 1.45e-01 1.28e-02 1.50e-03 9.88e-01 9.86e-01 ph/cm2/s
90%_error_low -5.38e-01 -1.45e-01 -1.28e-02 N/A -6.52e-01 -6.50e-01 ph/cm2/s
90%_error_hi 5.38e-01 3.32e-01 1.10e-01 N/A 7.31e-01 7.39e-01 ph/cm2/s
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