Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.47
    Process Start Time: Wed Jul 22 21:56:44 EDT 2020
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger980421
======================================================================

  Trigger: 00980421      Segment: 000

  BAT Trigger Time: 615300444.288   [s; MET]
      Trigger Stop: 615300446.336   [s; MET]
               UTC: 2020-07-01T12:46:59.079040    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 123.554730695954   Dec: -14.4938413543113  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.22
     Image Trigger?:     NO
     Rate S/N Ratio:     9  [ if not an image trigger ]
     Image S/N Ratio:    7.22

  Analysis Position:   [ source = BAT ]
    RA: 123.554730695954   Dec: -14.4938413543113  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 123.566684878342   Dec: -14.5336398394491  [deg; J2000]  
        { 08h 14m 16.0s , -14d 32' 01.1" }
         +/- 1.5225831988995 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.703721835831624 [arcmin] (formal 1-sigma fit error)
    SNR: 16.6835448249642
 
  Angular difference between the analysis and refined position is 2.486815 arcmin
 
  Partial Coding Fraction: 0.7734375    [ including projection effects ]

  Duration
     T90: 38.7799999713898 +/- 8.71284933029988
        Measured from: -5.12000000476837
                   to: 33.6599999666214     [s; relative to TRIGTIME]
     T50: 14.2719999551773 +/- 4.4944823660938
        Measured from: 0.00800001621246338
                   to: 14.2799999713898     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -1.72000002861023     
                   to: -0.720000028610229     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -6.80799996852875     
                   to: 42.1679999828339     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.635745   0.723826   0.320723   0.084487
           0.052164   0.053219   0.045229   0.039122 [error]
 Peak      0.029909   0.038926   0.017303   0.018803
           0.007807   0.007707   0.006855   0.005735 [error]

     [ fluence units of on-axis counts / fully illuminated detector ] 

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100   48.976   -6.808   42.168
T90    38.780   -5.120   33.660
T50    14.272    0.008   14.280
Peak    1.000   -1.720   -0.720
 
 
====== 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      -1.938    -0.168      0.162       -           -               -         2.06e-03     -2.28e-04          2.24e-04      67.110   57
CPL     -1.519    -0.644      0.834       45.743      N/A           N/A         3.66e-03        N/A               N/A         65.960   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      -1.652     -0.443     0.435       -           -               -         5.65e-03     -1.56e-03          1.50e-03      57.290   57
CPL     -1.651      N/A       N/A        9999.250      N/A           N/A         5.66e-03        N/A               N/A         57.300   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   1.94e-07  2.74e-07  2.86e-07  5.48e-07  9.26e-07  1.30e-06   erg/cm2
      90%_error_low -2.42e-08 -2.42e-08 -4.28e-08 -1.47e-07 -9.85e-08 -1.98e-07   erg/cm2
      90%_error_hi   2.47e-08  2.42e-08  4.36e-08  1.81e-07  1.01e-07  2.24e-07   erg/cm2
Peak flux       PL   2.69e-01  2.47e-01  1.58e-01  1.54e-01  7.38e-01  8.28e-01   ph/cm2/s
      90%_error_low -9.79e-02 -6.06e-02 -5.47e-02 -8.40e-02 -1.79e-01 -2.05e-01   ph/cm2/s
      90%_error_hi   1.03e-01  6.03e-02  5.56e-02  1.35e-01  1.79e-01  2.09e-01   ph/cm2/s
 
Fluence        CPL   1.89e-07  2.88e-07  2.76e-07  2.41e-07  8.77e-07  9.95e-07   erg/cm2
      90%_error_low -2.60e-08 -3.25e-08 -5.57e-08 -1.76e-07 -1.24e-07 -2.23e-07   erg/cm2
      90%_error_hi   2.60e-08  3.51e-08  4.86e-08  3.94e-07  1.26e-07  4.57e-07   erg/cm2
Peak flux      CPL   2.73e-01  2.45e-01  1.57e-01  1.55e-01  7.38e-01  8.19e-01   ph/cm2/s
      90%_error_low -1.02e-01 -5.74e-02 -5.41e-02 -9.76e-02 -1.78e-01 -3.38e-01   ph/cm2/s
      90%_error_hi   9.95e-02  7.26e-02  5.63e-02  6.26e-02  1.79e-01  2.14e-01   ph/cm2/s
 
======================================================================
  • Special notes of this burst