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: Sat Nov 16 12:06:18 EST 2024
Host Name: batproc1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1231488
======================================================================
Trigger: 01231488 Segment: 000
BAT Trigger Time: 738644344.32 [s; MET]
Trigger Stop: 738644345.344 [s; MET]
UTC: 2024-05-29T02:58:30.788060 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 335.321551571704 Dec: 51.5552654293351 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 11.12
Image Trigger?: NO
Rate S/N Ratio: 25.2388589282479 [ if not an image trigger ]
Image S/N Ratio: 11.12
Analysis Position: [ source = BAT ]
RA: 335.321551571704 Dec: 51.5552654293351 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 335.340496218476 Dec: 51.5573055046231 [deg; J2000]
{ 22h 21m 21.7s , +51d 33' 26.3" }
+/- 0.870606769881079 [arcmin] (estimated 90% radius based on SNR)
+/- 0.352974617273414 [arcmin] (formal 1-sigma fit error)
SNR: 37.0754895626986
Angular difference between the analysis and refined position is 0.717247 arcmin
Partial Coding Fraction: 0.2617188 [ including projection effects ]
Duration
T90: 158.971999883652 +/- 12.9762226866818
Measured from: -37.0520000457764
to: 121.919999837875 [s; relative to TRIGTIME]
T50: 65.2400000095367 +/- 1.35625963921704
Measured from: -11.4680000543594
to: 53.7719999551773 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.167999982833862
to: 1.16799998283386 [s; relative to TRIGTIME]
Total Fluence
Measured from: -70.9160000085831
to: 227.451999902725 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 8.819169 11.500703 8.864284 2.816632
0.178972 0.192749 0.175111 0.156538 [error]
Peak 0.196038 0.307450 0.279123 0.109869
0.019487 0.023152 0.021851 0.017481 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 298.368 -70.916 227.452
T90 158.972 -37.052 121.920
T50 65.240 -11.468 53.772
Peak 1.000 0.168 1.168
====== 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 -1.604 -0.044 0.044 - - - 7.39e-03 -1.64e-04 1.64e-04 61.250 57
CPL -1.602 -0.044 0.140 9998.060 -9998.060 -9998.060 7.40e-03 -1.65e-04 1.10e-03 61.260 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 -1.422 -0.129 0.129 - - - 6.31e-02 -4.94e-03 4.94e-03 58.180 57
CPL -1.105 -0.380 0.534 150.699 -64.514 -150.699 9.00e-02 -3.02e-02 7.11e-02 56.920 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 3.10e-06 5.35e-06 7.04e-06 1.88e-05 2.06e-05 3.43e-05 erg/cm2
90%_error_low -1.45e-07 -1.43e-07 -1.92e-07 -1.18e-06 -4.70e-07 -1.27e-06 erg/cm2
90%_error_hi 1.48e-07 1.43e-07 1.92e-07 1.23e-06 4.70e-07 1.31e-06 erg/cm2
Peak flux PL 2.41e+00 2.54e+00 1.90e+00 2.29e+00 7.73e+00 9.14e+00 ph/cm2/s
90%_error_low -3.28e-01 -2.22e-01 -1.77e-01 -4.06e-01 -6.25e-01 -7.19e-01 ph/cm2/s
90%_error_hi 3.41e-01 2.20e-01 1.75e-01 4.53e-01 6.26e-01 7.21e-01 ph/cm2/s
Fluence CPL 3.10e-06 5.35e-06 7.02e-06 1.94e-05 2.07e-05 3.50e-05 erg/cm2
90%_error_low N/A -1.48e-07 -2.42e-07 -3.86e-06 -6.65e-07 -3.91e-06 erg/cm2
90%_error_hi N/A 1.92e-07 3.00e-07 -3.88e-07 3.97e-07 4.93e-07 erg/cm2
Peak flux CPL 2.26e+00 2.62e+00 1.97e+00 1.66e+00 7.65e+00 8.51e+00 ph/cm2/s
90%_error_low -3.92e-01 -2.51e-01 -2.08e-01 -6.45e-01 -6.35e-01 -9.26e-01 ph/cm2/s
90%_error_hi 4.03e-01 2.57e-01 2.13e-01 8.13e-01 6.36e-01 1.10e+00 ph/cm2/s
======================================================================
Special notes of this burst