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: Sat Mar 9 13:56:06 EST 2024
Host Name: batproc1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1215912
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Trigger: 01215912 Segment: 000
BAT Trigger Time: 729914433.6 [s; MET]
Trigger Stop: 729914434.624 [s; MET]
UTC: 2024-02-18T02:00:00.666060 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 161.780800958629 Dec: 1.30403195307657 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6.54
Image Trigger?: NO
Rate S/N Ratio: 11.3578166916005 [ if not an image trigger ]
Image S/N Ratio: 6.54
Analysis Position: [ source = BAT ]
RA: 161.780800958629 Dec: 1.30403195307657 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 161.805780547244 Dec: 1.28978262037998 [deg; J2000]
{ 10h 47m 13.4s , +01d 17' 23.2" }
+/- 1.18607054720025 [arcmin] (estimated 90% radius based on SNR)
+/- 0.403427351333368 [arcmin] (formal 1-sigma fit error)
SNR: 23.8367041565111
Angular difference between the analysis and refined position is 1.725147 arcmin
Partial Coding Fraction: 0.3671875 [ including projection effects ]
Duration
T90: 258.031999945641 +/- 26.735401600844
Measured from: -9.1360000371933
to: 248.895999908447 [s; relative to TRIGTIME]
T50: 46.663999915123 +/- 20.1574869038965
Measured from: 5.15199995040894
to: 51.8159998655319 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 21.6200000047684
to: 22.6200000047684 [s; relative to TRIGTIME]
Total Fluence
Measured from: -19.2239999771118
to: 315.299999952316 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 2.980683 3.712684 2.676311 0.753564
0.133237 0.139926 0.120496 0.101388 [error]
Peak 0.070137 0.134645 0.119807 0.026716
0.012242 0.013704 0.012834 0.009127 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
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====== Table of the duration information =============================
Value tstart tstop
T100 334.524 -19.224 315.300
T90 258.032 -9.136 248.896
T50 46.664 5.152 51.816
Peak 1.000 21.620 22.620
====== 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 -1.619 -0.080 0.080 - - - 1.98e-03 -8.78e-05 8.75e-05 60.420 57
CPL -1.408 -0.249 0.340 142.140 -58.532 -142.140 2.52e-03 -6.00e-04 1.17e-03 59.150 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 -1.405 -0.182 0.180 - - - 2.42e-02 -2.76e-03 2.75e-03 67.270 57
CPL -0.305 -0.814 0.990 80.183 -17.742 78.349 8.36e-02 -4.95e-02 1.63e-01 61.690 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 9.47e-07 1.62e-06 2.11e-06 5.55e-06 6.19e-06 1.02e-05 erg/cm2
90%_error_low -7.31e-08 -7.47e-08 -1.22e-07 -6.75e-07 -2.90e-07 -7.67e-07 erg/cm2
90%_error_hi 7.50e-08 7.45e-08 1.22e-07 7.36e-07 2.92e-07 8.15e-07 erg/cm2
Peak flux PL 9.10e-01 9.69e-01 7.32e-01 8.99e-01 2.95e+00 3.51e+00 ph/cm2/s
90%_error_low -1.68e-01 -1.18e-01 -1.00e-01 -2.25e-01 -3.37e-01 -4.03e-01 ph/cm2/s
90%_error_hi 1.77e-01 1.17e-01 9.94e-02 2.63e-01 3.38e-01 4.06e-01 ph/cm2/s
Fluence CPL 9.10e-07 1.65e-06 2.13e-06 4.04e-06 6.08e-06 8.74e-06 erg/cm2
90%_error_low -9.04e-08 -8.71e-08 -1.30e-07 -1.47e-06 -3.31e-07 -1.50e-06 erg/cm2
90%_error_hi 9.21e-08 8.84e-08 1.31e-07 1.66e-06 3.29e-07 1.80e-06 erg/cm2
Peak flux CPL 7.31e-01 1.06e+00 8.13e-01 3.48e-01 2.85e+00 2.95e+00 ph/cm2/s
90%_error_low -2.05e-01 -1.42e-01 -1.22e-01 -1.76e-01 -3.48e-01 -3.99e-01 ph/cm2/s
90%_error_hi 2.16e-01 1.46e-01 1.25e-01 3.43e-01 3.48e-01 4.59e-01 ph/cm2/s
======================================================================