batgrbproduct Analysis for Trigger=676423

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Sun Feb 28 08:49:50 EST 2016
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger676423
======================================================================

  Trigger: 00676423      Segment: 000

  BAT Trigger Time: 478294344   [s; MET]
      Trigger Stop: 478294416   [s; MET]
               UTC: 2016-02-27T19:32:08.096040    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 194.788571324558   Dec: 78.6392014846058  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.02
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    7.02

  Flight Position:   [ source = BAT ]
    RA: 194.788571324558   Dec: 78.6392014846058  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 195.033726915832   Dec: 78.6721985463556  [deg; J2000]  
        { 13h 00m 08.1s , +78d 40' 19.9" }
         +/- 2.83561595939957 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.16379395960203 [arcmin] (formal 1-sigma fit error)
    SNR: 6.86245042388509
 
  Angular difference between Flight and Ground position is 3.505905 arcmin
 
  Partial Coding Fraction: 0.5078125    [ including projection effects ]

  Duration
     T90: 316.544000029564 +/- 75.3682152632844
        Measured from: -93.0960000157356
                   to: 223.448000013828     [s; relative to TRIGTIME]
     T50: 185.504000008106 +/- 13.8431441578225
        Measured from: 13.4480000138283
                   to: 198.952000021935     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 198.620000004768     
                   to: 199.620000004768     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -99.7519999742508     
                   to: 236.184000015259     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.457564   2.289112   1.378967   0.330014
           0.109891   0.110139   0.095125   0.078505 [error]
 Peak      0.010043   0.031023   0.033464   0.008931
           0.004758   0.004990   0.004355   0.003477 [error]

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

======================================================================
 
=== 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   Power-law 5.20e-07 8.70e-07 1.10e-06 2.81e-06 3.27e-06 5.30e-06   erg/cm2
              Error 5.10e-08 5.36e-08 9.18e-08 4.87e-07 2.20e-07 5.65e-07   erg/cm2
Peak flux Power-law 1.49e-01 1.96e-01 1.90e-01 3.28e-01 6.43e-01 8.63e-01   ph/cm2/s
              Error 5.05e-02 4.19e-02 3.29e-02 1.18e-01 1.13e-01 1.49e-01   ph/cm2/s
 
Fluence   Cutoff-PL 4.53e-07 9.53e-07 1.14e-06 8.51e-07 3.05e-06 3.39e-06   erg/cm2
              Error 6.12e-08 7.03e-08 1.04e-07 5.12e-07 2.47e-07 5.59e-07   erg/cm2
Peak flux Cutoff-PL 8.73e-02 2.23e-01 2.27e-01 6.57e-02 5.90e-01 6.02e-01   ph/cm2/s
              Error 6.18e-02 5.34e-02 4.45e-02 -------- 1.23e-01 1.54e-01   ph/cm2/s
 
Fluence        Band 4.44e-07 9.58e-07 1.11e-06 1.40e-06 3.06e-06 3.93e-06   erg/cm2
              Error 7.03e-08 8.65e-08 -------- -------- 2.63e-07 --------   erg/cm2
Peak flux      Band -------- -------- -------- -------- -------- --------   ph/cm2/s
              Error -------- -------- -------- -------- -------- --------   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.654    0.104    -      -           1.05e-03 6.62e-05   51.620 57
CPL   0.747    0.514      65.8   16.4      3.12e-03 2.08e-03   40.420 56
 
The chi2 of BB fit is Chi-Squared Chi-Squared which shows a significant improvement in the fit over a PL.
Check the BB fit.
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.047    0.274    -      -           5.57e-03 9.49e-04   75.840 57
CPL  -1.220    2.439      76.2   55.6      6.30e-02 6.82e-01   71.100 56
 
Model      : spectral model: simple power-law (PL) and cutoff power-law (CPL)
Ph_index   : photon index: E^-{Ph_index} (minus sign is not included in the 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 PL model and at 1 keV in CPL model
Nomr_90err : 90% error of the normalization
chi2       : Chi-Squared
dof        : degree of freedom
 
=== T90/T50 calculation in the 50-300 keV band (BATSE band) using 64 ms lc ===
 
T90 in the 50-300 keV band: 253.952000 sec.
T50 in the 50-300 keV band: 159.424000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  335.936  -99.752  236.184
T90   316.544  -93.096  223.448
T50   185.504   13.448  198.952
Peak    1.000  198.620  199.620

Image

Pre-slew 15.0-350.0 keV image (Event data)

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  195.0337    78.6722   0.0280    27.1336   -82.6992         1.7880554      6.862 TRIG_00676423                 
 
Foreground time interval of the image:
-99.752  93.301 (delta_t = 193.053 [sec])
Background time interval of the image:
-239.000 -99.752 (delta_t = 139.248 [sec])

Lightcurves

Notes:

1 s binning

From T0-310 s to T0+310 s
From T100_start - 20 s to T100_end + 30 s
Full time interval

64 ms binning

Full time interval
From T100_start to T100_end
From T0-5 sec to T0+5 sec

16 ms binning

From T100_start-5 s to T100_start+5 s

8 ms binning

From T100_start-3 s to T100_start+3 s

2 ms binning

From T100_start-1 s to T100_start+1 s

SN=5 or 10 sec. binning (whichever binning is satisfied first)

SN=5 or 10 sec. binning (T < 200 sec)

Spectra

Notes:

Time averaged spectrum fit using the pre-slew DRM

Power-law model
Time interval is from  -99.752 sec. to  236.184 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.65437     ( -0.10367   0.104912 )
Norm@50keV  : 1.04863E-03    ( -6.63954e-05   6.60721e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.62 using 59 PHA bins.
# Reduced chi-squared =         0.9056 for     57 degrees of freedom 
# Null hypothesis probability =   6.764100e-01
 
Photon flux (15-150 keV)    in 335.9 sec: 0.137122 ( -0.0084383  0.00844964 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.27449e-06 ( -2.19046e-07  2.20434e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  -99.752 sec. to  236.184 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.746891     ( -0.544255   0.483501 )
Epeak [keV] : 65.7679      ( -9.78619 23.1073 )
Norm@50keV  : 3.11632E-03    ( -0.00135147   0.00281653 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          40.42 using 59 PHA bins.
# Reduced chi-squared =         0.7217 for     56 degrees of freedom 
# Null hypothesis probability =   9.420396e-01
 
Photon flux (15-150 keV)    in 335.9 sec: 0.131396 ( -0.008926  0.008938 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.04519e-06 ( -2.4559e-07  2.4914e-07 ) ergs/cm2
 
Band function
Time interval is from  -99.752 sec. to  236.184 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.620882   ( -0.560888   1.7946 )
beta        : -2.42881    ( 2.42796   0.616953 )
Epeak [keV] : 61.6743      ( -23.7776 23.1805 )
Norm@50keV   : 3.69897E-03    ( -0.00192326   0.0735882 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          39.89 using 59 PHA bins.
# Reduced chi-squared =         0.7253 for     55 degrees of freedom 
# Null hypothesis probability =   9.374288e-01
 
Photon flux (15-150 keV)    in 335.9 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.06101e-06 ( -3.05866e-06  -2.48344e-07 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 13.3273  (-0.894266  0.966013)
R^2/D10^2   : 2.33087E-02  (-0.00527592   0.00674407)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          73.32 using 59 PHA bins.
# Reduced chi-squared =          1.286 for     57 degrees of freedom 
# Null hypothesis probability =   7.160222e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.947e-07   3.089e-08
25- 50  1.042e-06   7.457e-08
50-150  1.187e-06   1.542e-07
15-150  2.524e-06   1.765e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 143.184       (-34.5386      49.3205)
Norm        : 0.569596       (-0.0397715     0.0478527)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.69 using 59 PHA bins.
# Reduced chi-squared =         0.7665 for     57 degrees of freedom 
# Null hypothesis probability =   9.024547e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.892e-07   4.283e-08
25- 50  9.026e-07   1.114e-07
50-150  1.758e-06   5.949e-07
15-150  3.150e-06   7.049e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.81201        (-2.11423      2.15732)
R1^2/D10^2  : 9.56530E-02        (-0.0454623      0.10144)
kT2 [keV]   : 22.4207        (-5.06866      13.535)
R2^2/D10^2  : 2.39319E-03    (-0.00198525   0.0048013)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          41.45 using 59 PHA bins.
# Reduced chi-squared =         0.7536 for     55 degrees of freedom 
# Null hypothesis probability =   9.117594e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.223e-07   1.184e-07
25- 50  9.808e-07   2.806e-07
50-150  1.631e-06   7.385e-07
15-150  3.034e-06   9.869e-07

Peak spectrum fit

Power-law model
Time interval is from  198.620 sec. to  199.620 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.04666     ( -0.282995   0.265112 )
Norm@50keV  : 5.56909E-03    ( -0.000952918   0.000945036 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          75.84 using 59 PHA bins.
# Reduced chi-squared =          1.331 for     57 degrees of freedom 
# Null hypothesis probability =   4.828029e-02
 
Photon flux (15-150 keV)    in 1 sec: 0.643048 ( -0.112704  0.113636 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.9254e-08 ( -1.01917e-08  1.02459e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  198.620 sec. to  199.620 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.22046     ( -3.03861   1.83989 )
Epeak [keV] : 76.2037      ( -16.3684 94.8571 )
Norm@50keV  : 6.30095E-02    ( -0.0635873   1.30014 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          71.10 using 59 PHA bins.
# Reduced chi-squared =          1.270 for     56 degrees of freedom 
# Null hypothesis probability =   8.418183e-02
 
Photon flux (15-150 keV)    in 1 sec: 0.590386 ( -0.123206  0.12352 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.16582e-08 ( -1.18562e-08  1.23744e-08 ) ergs/cm2
 
Band function
Time interval is from  198.620 sec. to  199.620 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 3.49112   ( -2.61649   -2.3548 )
beta        : -2.04638    ( -6.22205   0.729738 )
Epeak [keV] : 58.2840      ( -18.345 36.8943 )
Norm@50keV   : 0.923740    ( -0.910732   2.24854 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          68.47 using 59 PHA bins.
# Reduced chi-squared =          1.245 for     55 degrees of freedom 
# Null hypothesis probability =   1.048024e-01
 
Photon flux (15-150 keV)    in 1 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 18.9247  (-2.9647  3.95975)
R^2/D10^2   : 3.89991E-02  (-0.0185691   0.0307174)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          71.34 using 59 PHA bins.
# Reduced chi-squared =          1.252 for     57 degrees of freedom 
# Null hypothesis probability =   9.586119e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.749e-09   8.765e-10
25- 50  1.319e-08   3.875e-09
50-150  3.468e-08   9.630e-09
15-150  5.062e-08   1.153e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-43.7797      -200)
Norm        : 2.72318       (-0.470428     0.470428)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          84.29 using 59 PHA bins.
# Reduced chi-squared =          1.479 for     57 degrees of freedom 
# Null hypothesis probability =   1.088179e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.781e-09   3.966e-09
25- 50  1.304e-08   7.385e-09
50-150  2.861e-08   1.641e-08
15-150  4.843e-08   2.808e-08
Double BB
------------------------------------------------------------
#Fit statistic : Chi-Squared =          71.34 using 59 PHA bins.
#Fit statistic : Chi-Squared =          69.15 using 59 PHA bins.
#Fit statistic : Chi-Squared =          67.75 using 59 PHA bins.
#Fit statistic : Chi-Squared =          67.63 using 59 PHA bins.
# Reduced chi-squared =          1.297 for     55 degrees of freedom 
# Reduced chi-squared =          1.257 for     55 degrees of freedom 
# Reduced chi-squared =          1.232 for     55 degrees of freedom 
# Reduced chi-squared =          1.230 for     55 degrees of freedom 
# Null hypothesis probability =   6.840630e-02
# Null hypothesis probability =   9.500759e-02
# Null hypothesis probability =   1.159372e-01
# Null hypothesis probability =   1.179176e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  0.000e+00   0.000e+00
25- 50  0.000e+00   0.000e+00
50-150  0.000e+00   0.000e+00
15-150  0.000e+00   0.000e+00
Plot creation:
Sun Feb 28 12:09:55 EST 2016