batgrbproduct Analysis for Trigger=518626

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Mon Mar 26 13:13:25 EDT 2012
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger518626/batgroup_hand_proc_good
======================================================================

  Trigger: 00518626      Segment: 000

  BAT Trigger Time: 354417637.312   [s; MET]
      Trigger Stop: 354417637.824   [s; MET]
               UTC: 2012-03-26T01:20:29.280140    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 273.92454494837   Dec: 69.2780331370331  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.23
     Image Trigger?:     NO
     Rate S/N Ratio:     10.1488915650922  [ if not an image trigger ]
     Image S/N Ratio:    7.23

  Flight Position:   [ source = BAT ]
    RA: 273.92454494837   Dec: 69.2780331370331  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 273.905534084917   Dec: 69.2484455921614  [deg; J2000]  
        { 18h 15m 37.3s , +69d 14' 54.4" }
         +/- 0.835698967239911 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.240207893077141 [arcmin] (formal 1-sigma fit error)
    SNR: 39.3075264234235
 
  Angular difference between Flight and Ground position is 1.820615 arcmin
 
  Partial Coding Fraction: 0.9140625    [ including projection effects ]

  Duration
     T90: 69.6199999451637 +/- 8.3293170973786
        Measured from: -55.067999958992
                   to: 14.5519999861717     [s; relative to TRIGTIME]
     T50: 5.19199997186661 +/- 0.433626552206227
        Measured from: 1.89600002765656
                   to: 7.08799999952316     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 3.58799999952316     
                   to: 4.58799999952316     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -67.8999999761581     
                   to: 22.5640000104904     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.863893   1.978683   0.943081   0.117087
           0.051027   0.050468   0.043490   0.036400 [error]
 Peak      0.192799   0.232561   0.111106   0.015903
           0.007761   0.008035   0.006563   0.004369 [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 5.90e-07 7.73e-07 7.43e-07 1.27e-06 2.53e-06 3.37e-06   erg/cm2
              Error 3.55e-08 2.77e-08 4.33e-08 1.55e-07 9.78e-08 1.93e-07   erg/cm2
Peak flux Power-law 2.00e+00 1.55e+00 8.08e-01 6.09e-01 4.64e+00 4.97e+00   ph/cm2/s
              Error 1.46e-01 7.15e-02 5.43e-02 8.05e-02 2.18e-01 2.25e-01   ph/cm2/s
 
Fluence   Cutoff-PL 5.34e-07 8.15e-07 7.34e-07 4.94e-07 2.58e-06 0.00e+00   erg/cm2
              Error 4.39e-08 3.47e-08 4.80e-08 2.19e-07 2.56e-07 0.00e+00   erg/cm2
Peak flux Cutoff-PL 1.77e+00 1.67e+00 8.21e-01 2.47e-01 4.44e+00 4.51e+00   ph/cm2/s
              Error 1.76e-01 9.22e-02 6.13e-02 1.05e-01 2.35e-01 2.61e-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    2.058    0.073    -      -           3.02e-03 1.25e-04   68.410 57
CPL   1.409    0.338      41.1    6.9      6.69e-03 2.87e-03   55.800 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.940    0.084    -      -           3.17e-02 1.62e-03   73.260 57
CPL   1.127    0.410      48.4    6.9      8.74e-02 4.76e-02   59.110 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: 12.096000 sec.
T50 in the 50-300 keV band: 3.648000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   90.464  -67.900   22.564
T90    69.620  -55.068   14.552
T50     5.192    1.896    7.088
Peak    1.000    3.588    4.588

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  273.9055 +69.2484 0.0049   15.3 -119.7       4.3454    39.3  TRIG_00518626       
------------------------------------------
 
Foreground time interval of the image:
-67.900  10.989 (delta_t =  78.889 [sec])
Background time interval of the image:
-239.312 -67.900 (delta_t = 171.412 [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  -67.900 sec. to   22.564 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.05829     ( -0.0726988   0.073815 )
Norm@50keV  : 3.01746E-03    ( -0.000125045   0.000124196 )
------------------------------------------------------------
# Chi-Squared =          68.41 using 59 PHA bins.
# Reduced chi-squared =          1.200 for     57 degrees of freedom 
# Null hypothesis probability =   1.432557e-01
 
Photon flux (15-150 keV)    in 90.46 sec: 0.465186 ( -0.0177791  0.0178425 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.52683e-06 ( -9.75466e-08  9.80062e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  -67.900 sec. to   22.564 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.40857     ( -0.352198   0.324338 )
Epeak [keV] : 41.0757      ( -7.83326 5.99254 )
Norm@50keV  : 6.69499E-03    ( -0.002163   0.00358684 )
------------------------------------------------------------
# Chi-Squared =          55.80 using 59 PHA bins.
# Reduced chi-squared =         0.9965 for     56 degrees of freedom 
# Null hypothesis probability =   4.823113e-01
 
Photon flux (15-150 keV)    in 90.46 sec: 0.443384 ( -0.020362  0.020488 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.57654e-06 ( -2.13685e-07  2.98283e-07 ) ergs/cm2
 
Band function
Time interval is from  -67.900 sec. to   22.564 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.12590   ( -0.553025   0.850004 )
beta        : -2.44121    ( 2.44353   0.244356 )
Epeak [keV] : 38.7222      ( -6.10788 7.17188 )
Norm@50keV   : 1.00387E-02    ( -0.00522048   0.0264422 )
------------------------------------------------------------
# Chi-Squared =          55.01 using 59 PHA bins.
# Reduced chi-squared =          1.000 for     55 degrees of freedom 
# Null hypothesis probability =   4.744158e-01
 
Photon flux (15-150 keV)    in 90.46 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]    : 10.8271  (  )
R^2/D10^2   : 0.148892  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared =         165.75 using 59 PHA bins.
# Reduced chi-squared =         2.9080 for     57 degrees of freedom 
# Null hypothesis probability =   1.501872e-12
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.288e-07   2.261e-08
25- 50  9.108e-07   3.704e-08
50-150  5.957e-07   5.229e-08
15-150  1.835e-06   6.830e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 65.7812       (-7.09321      8.46281)
Norm        : 2.27607       (-0.148979     0.162133)
------------------------------------------------------------
# Chi-Squared =          55.94 using 59 PHA bins.
# Reduced chi-squared =         0.9814 for     57 degrees of freedom 
# Null hypothesis probability =   5.148763e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.244e-07   2.831e-08
25- 50  8.201e-07   3.080e-08
50-150  1.005e-06   9.069e-08
15-150  2.349e-06   9.951e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.45823        (-1.0268      0.98548)
R1^2/D10^2  : 0.749535        (-0.280785      0.631005)
kT2 [keV]   : 19.3418        (-3.03232      4.52122)
R2^2/D10^2  : 1.06124E-02    (-0.00622795   0.0120357)
------------------------------------------------------------
# Chi-Squared =          62.11 using 59 PHA bins.
# Reduced chi-squared =          1.129 for     55 degrees of freedom 
# Null hypothesis probability =   2.376645e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.847e-07   6.884e-08
25- 50  8.248e-07   9.019e-08
50-150  1.001e-06   2.145e-07
15-150  2.311e-06   3.162e-07

Peak spectrum fit

Power-law model
Time interval is from    3.588 sec. to    4.588 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.94034     ( -0.0830812   0.0845589 )
Norm@50keV  : 3.17418E-02    ( -0.00163066   0.00161902 )
------------------------------------------------------------
# Chi-Squared =          73.26 using 59 PHA bins.
# Reduced chi-squared =          1.285 for     57 degrees of freedom 
# Null hypothesis probability =   7.221158e-02
 
Photon flux (15-150 keV)    in 1 sec: 4.63531 ( -0.218211  0.218588 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.9203e-07 ( -1.46189e-08  1.46934e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    3.588 sec. to    4.588 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.12736     ( -0.432402   0.388486 )
Epeak [keV] : 48.4045      ( -5.65137 8.07558 )
Norm@50keV  : 8.73670E-02    ( -0.03308   0.06206 )
------------------------------------------------------------
# Chi-Squared =          59.11 using 59 PHA bins.
# Reduced chi-squared =          1.056 for     56 degrees of freedom 
# Null hypothesis probability =   3.627228e-01
 
Photon flux (15-150 keV)    in 1 sec: 4.44248 ( -0.23442  0.23487 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.93743e-07 ( -2.7389e-08  3.8513e-08 ) ergs/cm2
 
Band function
Time interval is from    3.588 sec. to    4.588 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.633956   ( -0.643043   1.3209 )
beta        : -2.42024    ( -0.670684   0.287594 )
Epeak [keV] : 42.3259      ( -8.31487 7.9186 )
Norm@50keV   : 0.177425    ( -0.101249   1.22799 )
------------------------------------------------------------
# Chi-Squared =          56.01 using 59 PHA bins.
# Reduced chi-squared =          1.018 for     55 degrees of freedom 
# Null hypothesis probability =   4.366927e-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]    : 11.1683  (  )
R^2/D10^2   : 1.41096  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared =         122.29 using 59 PHA bins.
# Reduced chi-squared =         2.1454 for     57 degrees of freedom 
# Null hypothesis probability =   1.152850e-06
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.688e-08   2.810e-09
25- 50  1.063e-07   5.500e-09
50-150  7.578e-08   8.500e-09
15-150  2.190e-07   1.180e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 77.2855       (-10.5635      13.3288)
Norm        : 21.8680       (-1.59385     1.74431)
------------------------------------------------------------
# Chi-Squared =          59.50 using 59 PHA bins.
# Reduced chi-squared =          1.044 for     57 degrees of freedom 
# Null hypothesis probability =   3.846925e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.661e-08   3.845e-09
25- 50  9.240e-08   4.290e-09
50-150  1.274e-07   1.310e-08
15-150  2.764e-07   1.545e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.72271        (-1.36644      1.14422)
R1^2/D10^2  : 4.23143        (-1.45058      3.35982)
kT2 [keV]   : 24.1153        (-6.07838      11.3469)
R2^2/D10^2  : 4.39651E-02    (-0.0331108   0.108637)
------------------------------------------------------------
# Chi-Squared =          60.90 using 59 PHA bins.
# Reduced chi-squared =          1.107 for     55 degrees of freedom 
# Null hypothesis probability =   2.719428e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.892e-08   6.800e-09
25- 50  9.822e-08   1.212e-08
50-150  1.262e-07   5.261e-08
15-150  2.733e-07   6.385e-08
Plot creation:
Mon Mar 26 13:48:22 EDT 2012