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 v2.48
Process Start Time: Wed Dec 18 16:21:40 EST 2024
Host Name: batproc1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1270999
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Trigger: 01270999 Segment: 000
BAT Trigger Time: 754503308.864 [s; MET]
Trigger Stop: 754503312.96 [s; MET]
UTC: 2024-11-28T16:14:34.246600 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 273.723811228867 Dec: 33.4353166788259 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.43
Image Trigger?: NO
Rate S/N Ratio: 10.0995049383621 [ if not an image trigger ]
Image S/N Ratio: 8.43
Analysis Position: [ source = BAT ]
RA: 273.723811228867 Dec: 33.4353166788259 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 273.723679683175 Dec: 33.4924564181181 [deg; J2000]
{ 18h 14m 53.7s , +33d 29' 32.8" }
+/- 2.41352103677748 [arcmin] (estimated 90% radius based on SNR)
+/- 1.03281656072107 [arcmin] (formal 1-sigma fit error)
SNR: 8.63920874412409
Angular difference between the analysis and refined position is 3.428391 arcmin
Partial Coding Fraction: 0.5234375 [ including projection effects ]
Duration
T90: 237.62399995327 +/- 15.4966707218657
Measured from: 0.0400000810623169
to: 237.664000034332 [s; relative to TRIGTIME]
T50: 215.975999951363 +/- 208.145744792213
Measured from: 3.16400003433228
to: 219.139999985695 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 2.8840000629425
to: 3.8840000629425 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.855999946594238
to: 246.496000051498 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.455302 0.824546 0.409792 0.035866
0.112192 0.119295 0.110294 0.092613 [error]
Peak 0.045606 0.046604 0.034168 0.008146
0.009520 0.010253 0.009232 0.007443 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
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====== Table of the duration information =============================
Value tstart tstop
T100 247.352 -0.856 246.496
T90 237.624 0.040 237.664
T50 215.976 3.164 219.140
Peak 1.000 2.884 3.884
====== 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 -1.540 -0.325 0.313 - - - 4.55e-04 -9.63e-05 9.46e-05 62.900 57
CPL 0.774 -1.915 3.540 51.531 -10.627 45.612 8.78e-03 -8.78e-03 7.28e-01 58.460 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 -1.552 -0.409 0.394 - - - 8.14e-03 -2.05e-03 2.00e-03 71.980 57
CPL -0.972 -0.956 2.234 79.442 -38.471 -79.442 1.71e-02 -1.08e-02 2.74e-01 71.620 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 1.49e-07 2.68e-07 3.68e-07 1.05e-06 1.06e-06 1.84e-06 erg/cm2
90%_error_low -4.20e-08 -5.24e-08 -9.98e-08 -4.78e-07 -2.40e-07 -5.93e-07 erg/cm2
90%_error_hi 4.44e-08 5.22e-08 1.01e-07 6.90e-07 2.48e-07 7.68e-07 erg/cm2
Peak flux PL 3.52e-01 3.44e-01 2.35e-01 2.51e-01 1.03e+00 1.18e+00 ph/cm2/s
90%_error_low -1.23e-01 -8.16e-02 -7.41e-02 -1.28e-01 -2.38e-01 -2.80e-01 ph/cm2/s
90%_error_hi 1.33e-01 8.09e-02 7.39e-02 1.91e-01 2.38e-01 2.86e-01 ph/cm2/s
Fluence CPL 1.15e-07 3.44e-07 3.35e-07 6.42e-08 8.51e-07 8.58e-07 erg/cm2
90%_error_low -5.48e-08 -8.13e-08 -1.43e-07 N/A -2.18e-07 -2.25e-07 erg/cm2
90%_error_hi 5.44e-08 8.52e-08 1.36e-07 N/A 2.83e-07 5.17e-07 erg/cm2
Peak flux CPL 3.30e-01 3.69e-01 2.39e-01 1.18e-01 1.01e+00 1.06e+00 ph/cm2/s
90%_error_low -1.43e-01 -1.01e-01 -8.72e-02 -1.18e-01 -2.47e-01 -2.84e-01 ph/cm2/s
90%_error_hi 1.45e-01 1.13e-01 8.30e-02 1.78e-01 2.46e-01 3.00e-01 ph/cm2/s
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