batgrbproduct Analysis for Trigger=554620

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Sat Apr 27 19:24:40 EDT 2013
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger554620/batgroup_hand_proc
======================================================================

  Trigger: 00554620      Segment: 000

  BAT Trigger Time: 388741688   [s; MET]
      Trigger Stop: 388741752   [s; MET]
               UTC: 2013-04-27T07:47:57.511640    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 173.138779355743   Dec: 27.6915539178619  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    23.81
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    23.81

  Flight Position:   [ source = BAT ]
    RA: 173.138779355743   Dec: 27.6915539178619  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 173.149455699739   Dec: 27.7059053122466  [deg; J2000]  
        { 11h 32m 35.9s , +27d 42' 21.3" }
         +/- 0.976986144799111 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.246271051853577 [arcmin] (formal 1-sigma fit error)
    SNR: 31.4458628557863
 
  Angular difference between Flight and Ground position is 1.031092 arcmin
 
  Partial Coding Fraction: 0.140625    [ including projection effects ]

  Duration
     T90: 241.071999907494 +/- 4.67643795986048
        Measured from: -47.0199999809265
                   to: 194.051999926567     [s; relative to TRIGTIME]
     T50: 21.3599999547005 +/- 0.512390440098417
        Measured from: -43.7639999985695
                   to: -22.404000043869     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -43.4279999732971     
                   to: -42.4279999732971     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -51.1520000100136     
                   to: 660.051999986172     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total   115.303098 171.799536 169.690811  56.613231
           0.364352   0.425026   0.433717   0.335239 [error]
 Peak      5.982205  13.258145  18.524547   7.650508
           0.071113   0.105660   0.130893   0.109425 [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 3.71e-05 7.81e-05 1.29e-04 4.79e-04 3.55e-04 7.22e-04   erg/cm2
              Error 9.57e-07 1.25e-06 1.25e-06 9.94e-06 3.56e-06 9.81e-06   erg/cm2
Peak flux Power-law 6.50e+01 9.96e+01 1.14e+02 2.52e+02 3.54e+02 5.31e+02   ph/cm2/s
              Error 2.01e+00 1.92e+00 1.45e+00 6.75e+00 4.95e+00 7.25e+00   ph/cm2/s
 
Fluence   Cutoff-PL 3.49e-05 7.77e-05 1.31e-04 4.24e-04 3.54e-04 6.68e-04   erg/cm2
              Error 1.44e-06 1.29e-06 1.85e-06 2.61e-05 3.56e-06 2.61e-05   erg/cm2
Peak flux Cutoff-PL 5.49e+01 9.88e+01 1.22e+02 1.83e+02 3.48e+02 4.59e+02   ph/cm2/s
              Error 2.81e+00 2.01e+00 2.18e+00 1.28e+01 5.04e+00 1.40e+01   ph/cm2/s
 
Fluence        Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   erg/cm2
              Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   erg/cm2
Peak flux      Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   ph/cm2/s
              Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.281    0.018    -      -           5.02e-02 6.03e-04   28.910 57
CPL   1.128    0.078     410.8  222.3      5.67e-02 3.47e-03   17.670 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    0.800    0.023    -      -           3.08e+00 4.42e-02  108.710 57
CPL   0.352    0.104     249.8   43.6      4.51e+00 3.93e-01   51.060 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: 161.280000 sec.
T50 in the 50-300 keV band: 5.120000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  711.204  -51.152  660.052
T90   241.072  -47.020  194.052
T50    21.360  -43.764  -22.404
Peak    1.000  -43.428  -42.428

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  173.1495    27.7059   0.0062    39.1065   -76.1606        32.3855454     31.446 TRIG_00554620                 
 
Foreground time interval of the image:
-16.099  72.301 (delta_t =  88.400 [sec])
Background time interval of the image:

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  -51.152 sec. to  660.052 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.28095     ( -0.0180539   0.0179655 )
Norm@50keV  : 5.02100E-02    ( -0.000604176   0.000602666 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          28.91 using 59 PHA bins.
# Reduced chi-squared =         0.5072 for     57 degrees of freedom 
# Null hypothesis probability =   9.992911e-01
 
Photon flux (15-150 keV)    in 711.2 sec: 5.96967 ( -0.0841247  0.0844212 ) ph/cm2/s
Energy fluence (15-150 keV)             : 0.000354542 ( -3.56027e-06  3.56035e-06 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  -51.152 sec. to  660.052 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.12819     ( -0.0787594   0.0776682 )
Epeak [keV] : 410.800      ( -113.326 331.249 )
Norm@50keV  : 5.66897E-02    ( -0.00335003   0.00359056 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          17.67 using 59 PHA bins.
# Reduced chi-squared =         0.3156 for     56 degrees of freedom 
# Null hypothesis probability =   9.999998e-01
 
Photon flux (15-150 keV)    in 711.2 sec: 5.87716 ( -0.09421  0.09491 ) ph/cm2/s
Energy fluence (15-150 keV)             : 0.000354254 ( -3.56027e-06  3.56169e-06 ) ergs/cm2
 
Band function
Time interval is from  -51.152 sec. to  660.052 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.12818   ( -0.0247314   0.0232411 )
beta        : -9.97030    ( 9.8166   19.8166 )
Epeak [keV] : 410.731      ( -48.5668 331.098 )
Norm@50keV   : 5.66836E-02    ( -0.000550503   0.00281625 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          17.67 using 59 PHA bins.
# Reduced chi-squared =         0.3213 for     55 degrees of freedom 
# Null hypothesis probability =   9.999996e-01
 
Photon flux (15-150 keV)    in 711.2 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]    : 25.6510  (  )
R^2/D10^2   : 0.116098  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =        1809.38 using 59 PHA bins.
# Reduced chi-squared =        31.7435 for     57 degrees of freedom 
# Null hypothesis probability =   0.000000e+00
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.308e-06   2.169e-07
25- 50  5.350e-05   9.743e-07
50-150  2.599e-04   2.916e-06
15-150  3.227e-04   3.129e-06
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (      )
Norm        : 28.1101       (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =        1310.07 using 59 PHA bins.
# Reduced chi-squared =        22.9838 for     57 degrees of freedom 
# Null hypothesis probability =  1.690921e-236
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.978e-05   6.152e-07
25- 50  9.576e-05   1.245e-06
50-150  2.100e-04   2.738e-06
15-150  3.556e-04   4.587e-06
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 9.48990        (-0.436348      0.452874)
R1^2/D10^2  : 1.85065        (-0.263305      0.318267)
kT2 [keV]   : 36.9071        (-1.26304      1.43292)
R2^2/D10^2  : 2.89237E-02    (-0.00361227   0.00380004)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.31 using 59 PHA bins.
# Reduced chi-squared =         0.9148 for     55 degrees of freedom 
# Null hypothesis probability =   6.539484e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.749e-05   1.255e-06
25- 50  7.999e-05   1.814e-06
50-150  2.439e-04   3.236e-06
15-150  3.514e-04   4.374e-06

Peak spectrum fit

Power-law model
Time interval is from  -43.428 sec. to  -42.428 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.799968     ( -0.0227391   0.0226336 )
Norm@50keV  : 3.07660    ( -0.0442462   0.0441406 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         108.71 using 59 PHA bins.
# Reduced chi-squared =         1.9071 for     57 degrees of freedom 
# Null hypothesis probability =   4.433845e-05
 
Photon flux (15-150 keV)    in 1 sec: 353.600 ( -4.94724  4.95103 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.59532e-05 ( -4.63605e-07  4.63573e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  -43.428 sec. to  -42.428 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.351654     ( -0.105397   0.10332 )
Epeak [keV] : 249.795      ( -34.2419 53.0077 )
Norm@50keV  : 4.51279    ( -0.37342   0.413362 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.06 using 59 PHA bins.
# Reduced chi-squared =         0.9119 for     56 degrees of freedom 
# Null hypothesis probability =   6.617856e-01
 
Photon flux (15-150 keV)    in 1 sec: 347.931 ( -5.027  5.046 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.60154e-05 ( 0  0 ) ergs/cm2
 
Band function
Time interval is from  -43.428 sec. to  -42.428 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.813058   ( 0.813058   0.813058 )
beta        : -0.799968    ( -0.0226325   0.0227404 )
Epeak [keV] : 15.7520      ( -15.752 -15.752 )
Norm@50keV   : 4.45467    ( -1.41984   0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         108.71 using 59 PHA bins.
# Reduced chi-squared =         1.9765 for     55 degrees of freedom 
# Null hypothesis probability =   2.169676e-05
 
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]    : 28.1988  (  )
R^2/D10^2   : 6.50774  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         570.96 using 59 PHA bins.
# Reduced chi-squared =         10.017 for     57 degrees of freedom 
# Null hypothesis probability =   6.770722e-86
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.403e-07   2.315e-08
25- 50  5.048e-06   1.055e-07
50-150  2.897e-05   4.750e-07
15-150  3.486e-05   5.000e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (      )
Norm        : 1492.38       (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =        3227.69 using 59 PHA bins.
# Reduced chi-squared =        56.6262 for     57 degrees of freedom 
# Null hypothesis probability =   0.000000e+00
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.716e-06   5.400e-08
25- 50  7.149e-06   9.450e-08
50-150  1.568e-05   2.150e-07
15-150  2.654e-05   3.900e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 11.5774        (-1.06484      1.14901)
R1^2/D10^2  : 40.3438        (-7.99115      11.0617)
kT2 [keV]   : 42.5048        (-2.91722      3.93953)
R2^2/D10^2  : 1.62919    (-0.395156   0.417986)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.07 using 59 PHA bins.
# Reduced chi-squared =          1.056 for     55 degrees of freedom 
# Null hypothesis probability =   3.629112e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.503e-06   8.050e-08
25- 50  5.957e-06   1.850e-07
50-150  2.862e-05   8.750e-07
15-150  3.608e-05   1.080e-06
Plot creation:
Mon May 20 16:39:08 EDT 2013