batgrbproduct Analysis for Trigger=551126

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Sat Mar 16 07:14:11 EDT 2013
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger551126/GCN5_download_cron
======================================================================

  Trigger: 00551126      Segment: 000

  BAT Trigger Time: 385044343.296   [s; MET]
      Trigger Stop: 385044355.456   [s; MET]
               UTC: 2013-03-15T12:45:32.970220    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 157.542476803624   Dec: -51.8102228367283  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.07
     Image Trigger?:     NO
     Rate S/N Ratio:     10.6301458127346  [ if not an image trigger ]
     Image S/N Ratio:    8.07

  Flight Position:   [ source = BAT ]
    RA: 157.542476803624   Dec: -51.8102228367283  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 157.541147533728   Dec: -51.7937310681136  [deg; J2000]  
        { 10h 30m 09.9s , -51d 47' 37.4" }
         +/- 1.32353496674533 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.495976834897246 [arcmin] (formal 1-sigma fit error)
    SNR: 20.3803030625748
 
  Angular difference between Flight and Ground position is 0.990734 arcmin
 
  Partial Coding Fraction: 0.421875    [ including projection effects ]

  Duration
     T90: 233.379999935627 +/- 17.4808786701615
        Measured from: 4.67200011014938
                   to: 238.052000045776     [s; relative to TRIGTIME]
     T50: 139.707999944687 +/- 9.9838759986685
        Measured from: 31.524000108242
                   to: 171.232000052929     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 8.40799999237061     
                   to: 9.40799999237061     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -3.30000001192093     
                   to: 267.995999991894     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     2.396834   2.952511   2.128377   0.436545
           0.113031   0.115961   0.100423   0.083248 [error]
 Peak      0.010978   0.044943   0.055727   0.007775
           0.009264   0.010163   0.009383   0.007230 [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 8.99e-07 1.37e-06 1.57e-06 3.43e-06 4.86e-06 7.27e-06   erg/cm2
              Error 7.03e-08 6.49e-08 9.87e-08 4.58e-07 2.35e-07 5.36e-07   erg/cm2
Peak flux Power-law 2.29e-01 2.97e-01 2.83e-01 4.77e-01 9.68e-01 1.29e+00   ph/cm2/s
              Error 1.09e-01 9.16e-02 6.87e-02 2.31e-01 2.48e-01 3.09e-01   ph/cm2/s
 
Fluence   Cutoff-PL 8.36e-07 1.42e-06 1.61e-06 1.96e-06 4.73e-06 5.82e-06   erg/cm2
              Error 8.62e-08 7.82e-08 1.07e-07 9.09e-07 2.61e-07 9.38e-07   erg/cm2
Peak flux Cutoff-PL 1.51e-01 3.21e-01 3.40e-01 1.65e-01 9.27e-01 9.77e-01   ph/cm2/s
              Error 1.24e-01 1.12e-01 9.44e-02 2.78e-01 2.51e-01 3.48e-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    1.806    0.083    -      -           1.95e-03 9.25e-05   67.180 57
CPL   1.400    0.350      73.7   57.5      3.11e-03 1.29e-03   62.860 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.071    0.379    -      -           8.37e-03 2.06e-03   64.520 57
CPL  -0.490    2.236      92.3  -32.1      4.08e-02 2.59e-01   62.100 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: 231.936000 sec.
T50 in the 50-300 keV band: 135.232000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  271.296   -3.300  267.996
T90   233.380    4.672  238.052
T50   139.708   31.524  171.232
Peak    1.000    8.408    9.408

Image

Pre-slew 15-350 keV image (Event data; bkg subtracted)

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  157.5411 -51.7937 0.0094   44.0   -0.6       3.1928    20.4  TRIG_00551126       
------------------------------------------
 
Foreground time interval of the image:
 -3.300  60.005 (delta_t =  63.305 [sec])
Background time interval of the image:
-239.296  -3.300 (delta_t = 235.996 [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   -3.300 sec. to  267.996 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.80607     ( -0.0823406   0.0832837 )
Norm@50keV  : 1.94582E-03    ( -9.27224e-05   9.2367e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.18 using 59 PHA bins.
# Reduced chi-squared =          1.179 for     57 degrees of freedom 
# Null hypothesis probability =   1.675808e-01
 
Photon flux (15-150 keV)    in 271.3 sec: 0.268763 ( -0.0130796  0.0131192 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.8589e-06 ( -2.35042e-07  2.35661e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -3.300 sec. to  267.996 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.39962     ( -0.363567   0.335852 )
Epeak [keV] : 73.6943      ( -14.9462 100.049 )
Norm@50keV  : 3.11438E-03    ( -0.000982276   0.00158871 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.86 using 59 PHA bins.
# Reduced chi-squared =          1.123 for     56 degrees of freedom 
# Null hypothesis probability =   2.463456e-01
 
Photon flux (15-150 keV)    in 271.3 sec: 0.262252 ( -0.014038  0.0141 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.7261e-06 ( -2.61343e-07  2.60692e-07 ) ergs/cm2
 
Band function
Time interval is from   -3.300 sec. to  267.996 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.30118   ( -0.413951   1.0245 )
beta        : -2.12124    ( 2.12152   0.287629 )
Epeak [keV] : 65.4262      ( -19.5613 85.4597 )
Norm@50keV   : 3.55434E-03    ( -0.00136808   0.0165162 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.56 using 59 PHA bins.
# Reduced chi-squared =          1.137 for     55 degrees of freedom 
# Null hypothesis probability =   2.256542e-01
 
Photon flux (15-150 keV)    in 271.3 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]    : 13.2938  (  )
R^2/D10^2   : 4.30779E-02  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         162.81 using 59 PHA bins.
# Reduced chi-squared =         2.8564 for     57 degrees of freedom 
# Null hypothesis probability =   4.027257e-12
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.378e-07   3.432e-08
25- 50  1.544e-06   8.288e-08
50-150  1.748e-06   1.576e-07
15-150  3.730e-06   1.980e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 110.968       (-18.5112      22.4325)
Norm        : 1.14351       (-0.0725651     0.0856063)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          63.12 using 59 PHA bins.
# Reduced chi-squared =          1.107 for     57 degrees of freedom 
# Null hypothesis probability =   2.689430e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.100e-07   6.810e-08
25- 50  1.429e-06   8.030e-08
50-150  2.451e-06   6.542e-07
15-150  4.690e-06   6.688e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.07468        (-1.14183      1.38404)
R1^2/D10^2  : 0.490003        (-0.246914      0.600552)
kT2 [keV]   : 20.7030        (-2.75315      4.5087)
R2^2/D10^2  : 6.46518E-03    (-0.00356825   0.00522379)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          69.60 using 59 PHA bins.
# Reduced chi-squared =          1.265 for     55 degrees of freedom 
# Null hypothesis probability =   8.896118e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.063e-07   1.415e-07
25- 50  1.407e-06   1.658e-07
50-150  2.388e-06   3.871e-07
15-150  4.602e-06   6.077e-07

Peak spectrum fit

Power-law model
Time interval is from    8.408 sec. to    9.408 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.07137     ( -0.396111   0.36268 )
Norm@50keV  : 8.36995E-03    ( -0.00207883   0.00204755 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.52 using 59 PHA bins.
# Reduced chi-squared =          1.132 for     57 degrees of freedom 
# Null hypothesis probability =   2.304967e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.968294 ( -0.246131  0.249805 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.83269e-08 ( -2.12677e-08  2.13541e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    8.408 sec. to    9.408 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.490326     ( -2.80263   1.66982 )
Epeak [keV] : 92.2703      ( -28.0839 -92.2569 )
Norm@50keV  : 4.08146E-02    ( -0.0408335   0.477151 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.10 using 59 PHA bins.
# Reduced chi-squared =          1.109 for     56 degrees of freedom 
# Null hypothesis probability =   2.679479e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.926752 ( -0.248156  0.253588 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.45897e-08 ( -2.24223e-08  2.23333e-08 ) ergs/cm2
 
Band function
Time interval is from    8.408 sec. to    9.408 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.97713   ( -14.8263   -4.97713 )
beta        : -1.35236    ( -1.25533   0.481857 )
Epeak [keV] : 36.4258      ( -15.5684 19.0617 )
Norm@50keV   : 73.7845    ( -16.8985   1758.36 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.64 using 59 PHA bins.
# Reduced chi-squared =          1.121 for     55 degrees of freedom 
# Null hypothesis probability =   2.507520e-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]    : 20.7760  (-4.61671  6.7966)
R^2/D10^2   : 4.36909E-02  (-0.0268763   0.0581887)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.60 using 59 PHA bins.
# Reduced chi-squared =          1.098 for     57 degrees of freedom 
# Null hypothesis probability =   2.843403e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.579e-09   1.730e-09
25- 50  1.827e-08   7.460e-09
50-150  5.874e-08   2.982e-08
15-150  8.059e-08   3.330e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (      )
Norm        : 4.18051       (-1.03054     1.03033)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          68.60 using 59 PHA bins.
# Reduced chi-squared =          1.204 for     57 degrees of freedom 
# Null hypothesis probability =   1.395725e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.042e-08   6.425e-09
25- 50  2.004e-08   1.187e-08
50-150  4.395e-08   2.602e-08
15-150  7.442e-08   4.350e-08
Double BB
#Fit statistic : Chi-Squared =          61.95 using 59 PHA bins.
#Fit statistic : Chi-Squared =          61.93 using 59 PHA bins.
#Fit statistic : Chi-Squared =          61.91 using 59 PHA bins.
# Reduced chi-squared =          1.128 for     55 degrees of freedom 
# Reduced chi-squared =          1.127 for     55 degrees of freedom 
# Reduced chi-squared =          1.126 for     55 degrees of freedom 
# Reduced chi-squared =          1.126 for     55 degrees of freedom 
# Reduced chi-squared =          1.126 for     55 degrees of freedom 
# Null hypothesis probability =   2.396088e-01
# Null hypothesis probability =   2.416490e-01
# Null hypothesis probability =   2.420587e-01
# Null hypothesis probability =   2.427265e-01
# Null hypothesis probability =   2.432974e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.830e-09   3.756e-09
25- 50  1.929e-08   1.980e-08
50-150  6.067e-08   3.905e-08
15-150  8.479e-08   5.140e-08
Plot creation:
Sat Mar 16 07:51:21 EDT 2013