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: Fri Jun 20 17:29:13 EDT 2025
Host Name: batproc1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1290305
======================================================================
Trigger: 01290305 Segment: 000
BAT Trigger Time: 761801712.192 [s; MET]
Trigger Stop: 761801714.24 [s; MET]
UTC: 2025-02-21T03:34:37.076040 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 59.4766170518887 Dec: -15.1387040573162 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.54
Image Trigger?: NO
Rate S/N Ratio: 22.7156333832011 [ if not an image trigger ]
Image S/N Ratio: 10.54
Analysis Position: [ source = BAT ]
RA: 59.4766170518887 Dec: -15.1387040573162 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 59.4757486909577 Dec: -15.135824739688 [deg; J2000]
{ 03h 57m 54.2s , -15d 08' 09.0" }
+/- 1.87833796411089 [arcmin] (estimated 90% radius based on SNR)
+/- 0.811285701197408 [arcmin] (formal 1-sigma fit error)
SNR: 12.3598455084786
Angular difference between the analysis and refined position is 0.179931 arcmin
Partial Coding Fraction: 0.1972656 [ including projection effects ]
Duration
T90: 1.79999995231628 +/- 0.30841529631772
Measured from: -0.136000037193298
to: 1.66399991512299 [s; relative to TRIGTIME]
T50: 0.879999876022339 +/- 0.235185044842754
Measured from: 0.351999998092651
to: 1.23199987411499 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.424000024795532
to: 1.42400002479553 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.220000028610229
to: 1.84399998188019 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.143534 0.202021 0.196426 0.044810
0.024026 0.027180 0.024398 0.020026 [error]
Peak 0.080075 0.112870 0.138871 0.019229
0.016928 0.019597 0.018122 0.013810 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 2.064 -0.220 1.844
T90 1.800 -0.136 1.664
T50 0.880 0.352 1.232
Peak 1.000 0.424 1.424
====== 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 -1.418 -0.230 0.229 - - - 2.00e-02 -2.66e-03 2.66e-03 45.640 57
CPL -1.273 -1.363 0.997 260.707 -260.707 -260.707 2.36e-02 -1.95e-02 4.58e-02 45.570 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 -1.337 -0.260 0.258 - - - 2.41e-02 -3.90e-03 3.89e-03 50.680 57
CPL 0.051 -1.181 1.669 84.790 -19.618 135.050 9.99e-02 -9.99e-02 3.52e-01 46.500 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 4.88e-08 9.43e-08 1.41e-07 4.57e-07 3.98e-07 7.41e-07 erg/cm2
90%_error_low -1.10e-08 -1.35e-08 -2.38e-08 -1.47e-07 -5.79e-08 -1.67e-07 erg/cm2
90%_error_hi 1.17e-08 1.33e-08 2.35e-08 1.86e-07 5.84e-08 1.99e-07 erg/cm2
Peak flux PL 8.49e-01 9.41e-01 7.45e-01 9.75e-01 2.90e+00 3.51e+00 ph/cm2/s
90%_error_low -2.30e-01 -1.72e-01 -1.41e-01 -3.26e-01 -4.81e-01 -5.77e-01 ph/cm2/s
90%_error_hi 2.51e-01 1.69e-01 1.39e-01 4.04e-01 4.83e-01 5.82e-01 ph/cm2/s
Fluence CPL 4.75e-08 9.57e-08 1.43e-07 3.70e-07 3.95e-07 6.56e-07 erg/cm2
90%_error_low -1.36e-08 -1.46e-08 -2.54e-08 -2.54e-07 -6.15e-08 -2.61e-07 erg/cm2
90%_error_hi 1.13e-08 1.62e-08 2.71e-08 1.23e-07 5.96e-08 1.39e-07 erg/cm2
Peak flux CPL 5.88e-01 1.01e+00 8.78e-01 3.86e-01 2.74e+00 2.86e+00 ph/cm2/s
90%_error_low -2.99e-01 -2.04e-01 -1.84e-01 -2.10e-01 -5.11e-01 -5.75e-01 ph/cm2/s
90%_error_hi 3.27e-01 2.03e-01 1.95e-01 4.64e-01 5.06e-01 6.58e-01 ph/cm2/s
======================================================================
Special notes of this burst