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 v2.48
Process Start Time: Sun May 12 20:30:28 EDT 2024
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1227767/GCN5_download_cron
======================================================================
Trigger: 01227767 Segment: 000
BAT Trigger Time: 737143646.656 [s; MET]
Trigger Stop: 737143648.704 [s; MET]
UTC: 2024-05-11T18:06:53.226840 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 336.664509948977 Dec: 8.51351293746527 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.52
Image Trigger?: NO
Rate S/N Ratio: 14.8996644257513 [ if not an image trigger ]
Image S/N Ratio: 8.52
Analysis Position: [ source = BAT ]
RA: 336.664509948977 Dec: 8.51351293746527 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 336.668521076857 Dec: 8.51416525750696 [deg; J2000]
{ 22h 26m 40.4s , +08d 30' 51.0" }
+/- 0.689232651612834 [arcmin] (estimated 90% radius based on SNR)
+/- 0.235260275407324 [arcmin] (formal 1-sigma fit error)
SNR: 51.7635815640006
Angular difference between the analysis and refined position is 0.241212 arcmin
Partial Coding Fraction: 0.8515625 [ including projection effects ]
Duration
T90: 148.536000013351 +/- 17.0657857031545
Measured from: -44.8279999494553
to: 103.708000063896 [s; relative to TRIGTIME]
T50: 59.9880000352859 +/- 2.39597334507173
Measured from: -15.095999956131
to: 44.892000079155 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 35.1480000019073
to: 36.1480000019073 [s; relative to TRIGTIME]
Total Fluence
Measured from: -92.0119999647141
to: 203.703999996185 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 4.891166 6.502661 4.679380 1.151685
0.099978 0.104191 0.089568 0.072790 [error]
Peak 0.074694 0.123857 0.094247 0.022257
0.007559 0.008561 0.007527 0.005405 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 295.716 -92.012 203.704
T90 148.536 -44.828 103.708
T50 59.988 -15.096 44.892
Peak 1.000 35.148 36.148
====== 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 -1.582 -0.042 0.042 - - - 4.39e-03 -9.56e-05 9.56e-05 42.730 57
CPL -1.403 -0.168 0.174 185.591 -64.702 2380.679 5.29e-03 -8.12e-04 1.02e-03 39.450 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 -1.437 -0.131 0.130 - - - 2.09e-02 -1.64e-03 1.64e-03 60.620 57
CPL -1.220 -0.288 0.555 182.912 -182.912 -182.912 2.69e-02 -7.41e-03 2.37e-02 60.090 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 1.55e-06 2.71e-06 3.63e-06 9.93e-06 1.06e-05 1.78e-05 erg/cm2
90%_error_low -6.97e-08 -7.04e-08 -9.62e-08 -6.00e-07 -2.36e-07 -6.45e-07 erg/cm2
90%_error_hi 7.11e-08 7.03e-08 9.60e-08 6.26e-07 2.36e-07 6.65e-07 erg/cm2
Peak flux PL 8.11e-01 8.47e-01 6.26e-01 7.46e-01 2.57e+00 3.03e+00 ph/cm2/s
90%_error_low -1.07e-01 -7.13e-02 -6.02e-02 -1.37e-01 -2.03e-01 -2.38e-01 ph/cm2/s
90%_error_hi 1.11e-01 7.08e-02 5.97e-02 1.54e-01 2.03e-01 2.39e-01 ph/cm2/s
Fluence CPL 1.48e-06 2.74e-06 3.68e-06 7.88e-06 1.04e-05 1.58e-05 erg/cm2
90%_error_low -9.26e-08 -7.44e-08 -1.08e-07 -1.50e-06 -2.65e-07 -1.52e-06 erg/cm2
90%_error_hi 9.46e-08 7.47e-08 1.09e-07 1.91e-06 2.64e-07 1.92e-06 erg/cm2
Peak flux CPL 7.81e-01 8.66e-01 6.40e-01 5.78e-01 2.55e+00 2.86e+00 ph/cm2/s
90%_error_low -1.27e-01 -8.30e-02 -6.77e-02 -2.53e-01 -2.07e-01 -3.34e-01 ph/cm2/s
90%_error_hi 1.26e-01 8.59e-02 6.92e-02 2.13e-01 2.07e-01 3.13e-01 ph/cm2/s
======================================================================
Special notes of this burst