batgrbproduct Analysis for Trigger=531428

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Mon Aug 20 19:49:19 EDT 2012
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger531428/GCN5_download_cron
======================================================================

  Trigger: 00531428      Segment: 000

  BAT Trigger Time: 367074624   [s; MET]
      Trigger Stop: 367074696   [s; MET]
               UTC: 2012-08-19T13:10:14.445520    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 235.887635135529   Dec: -7.30488686709695  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.61
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    7.61

  Flight Position:   [ source = BAT ]
    RA: 235.887635135529   Dec: -7.30488686709695  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 235.886570244931   Dec: -7.30375202857007  [deg; J2000]  
        { 15h 43m 32.8s , -07d 18' 13.5" }
         +/- 2.93821057210376 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.50558263659601 [arcmin] (formal 1-sigma fit error)
    SNR: 6.52271643232368
 
  Angular difference between Flight and Ground position is 0.093020 arcmin
 
  Partial Coding Fraction: 0.3085938    [ including projection effects ]

  Duration
     T90: 71.0519999265671 +/- 20.7585596945888
        Measured from: 5.56800013780594
                   to: 76.620000064373     [s; relative to TRIGTIME]
     T50: 17.4839999079704 +/- 17.1465292044637
        Measured from: 14.1000001430511
                   to: 31.5840000510216     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 6.19599997997284     
                   to: 7.19599997997284     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 4.4200000166893     
                   to: 82.8799999952316     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.433564   0.797035   0.591896   0.226112
           0.107003   0.096720   0.082522   0.074071 [error]
 Peak      0.020375   0.021140   0.041304   0.022410
           0.012480   0.011546   0.010347   0.009224 [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 1.86e-07 3.44e-07 4.91e-07 1.48e-06 1.40e-06 2.50e-06   erg/cm2
              Error 4.37e-08 4.94e-08 8.09e-08 5.31e-07 1.99e-07 5.87e-07   erg/cm2
Peak flux Power-law 1.38e-01 2.13e-01 2.47e-01 5.53e-01 7.61e-01 1.15e+00   ph/cm2/s
              Error 1.20e-01 1.12e-01 7.95e-02 4.36e-01 2.81e-01 4.18e-01   ph/cm2/s
 
Fluence   Cutoff-PL 3.06e-07 6.06e-07 9.15e-07 2.75e-06 4.58e-06 0.00e+00   erg/cm2
              Error 8.63e-08 9.32e-08 1.52e-07 2.07e-06 1.68e-06 0.00e+00   erg/cm2
Peak flux Cutoff-PL 1.17e-01 2.08e-01 2.58e-01 4.24e-01 7.42e-01 1.01e+00   ph/cm2/s
              Error 1.40e-01 1.64e-01 1.05e-01 5.42e-01 3.05e-01 4.55e-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 1.52e-01 2.25e-01 1.14e+00 0.00e+00 0.00e+00 0.00e+00   ph/cm2/s
              Error 1.52e-01 5.32e-01 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    1.486    0.228    -      -           1.88e-03 2.49e-04   48.670 57
CPL   0.487    1.271      74.7  -27.2      5.99e-03 1.65e-02   46.180 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.784    0.688    -      -           6.62e-03 2.59e-03   61.210 57
CPL   0.409    2.398     296.9    0.0      8.92e-03 3.42e-01   61.160 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: 41.216000 sec.
T50 in the 50-300 keV band: 21.312000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   78.460    4.420   82.880
T90    71.052    5.568   76.620
T50    17.484   14.100   31.584
Peak    1.000    6.196    7.196

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  235.8866  -7.3038 0.0296   36.0  -63.7       1.7258     6.5  TRIG_00531428       
------------------------------------------
 
Foreground time interval of the image:
  4.420  81.501 (delta_t =  77.081 [sec])
Background time interval of the image:
-60.000 -22.760 (delta_t =  37.240 [sec])
-22.000   4.420 (delta_t =  26.420 [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    4.420 sec. to   82.880 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.48594     ( -0.228953   0.227676 )
Norm@50keV  : 1.87741E-03    ( -0.000248872   0.000248436 )
------------------------------------------------------------
# Chi-Squared =          48.67 using 59 PHA bins.
# Reduced chi-squared =         0.8538 for     57 degrees of freedom 
# Null hypothesis probability =   7.759484e-01
 
Photon flux (15-150 keV)    in 78.46 sec: 0.233500 ( -0.0322143  0.0323989 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.40064e-06 ( -1.98212e-07  2.00176e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    4.420 sec. to   82.880 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.487379     ( -1.48302   1.05953 )
Epeak [keV] : 74.7156      ( -20.3983 -74.7024 )
Norm@50keV  : 5.99044E-03    ( -0.00599373   0.0269737 )
------------------------------------------------------------
# Chi-Squared =          46.18 using 59 PHA bins.
# Reduced chi-squared =         0.8247 for     56 degrees of freedom 
# Null hypothesis probability =   8.223153e-01
 
Photon flux (15-150 keV)    in 78.46 sec: 0.221938 ( -0.034934  0.034814 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.57637e-06 ( -1.92571e-06  1.439e-06 ) ergs/cm2
 
Band function
Time interval is from    4.420 sec. to   82.880 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 7.29032E-02   ( -1.40255   3.01381 )
beta        : -2.07967    ( 2.07943   0.609573 )
Epeak [keV] : 59.8890      ( -32.2216 79.0064 )
Norm@50keV   : 1.25857E-02    ( -0.0140925   24.8083 )
------------------------------------------------------------
# Chi-Squared =          44.99 using 59 PHA bins.
# Reduced chi-squared =         0.8179 for     55 degrees of freedom 
# Null hypothesis probability =   8.302342e-01
 
Photon flux (15-150 keV)    in 78.46 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]    : 14.6354  (-2.00373  2.46686)
R^2/D10^2   : 2.93010E-02  (-0.0126312   0.0207134)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared =          50.66 using 59 PHA bins.
# Reduced chi-squared =         0.8888 for     57 degrees of freedom 
# Null hypothesis probability =   7.102988e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.035e-07   2.892e-08
25- 50  4.018e-07   8.293e-08
50-150  5.792e-07   1.506e-07
15-150  1.084e-06   2.001e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (-83.9361      -199.992)
Norm        : 0.963730       (-0.12622     0.126346)
------------------------------------------------------------
# Chi-Squared =          47.54 using 59 PHA bins.
# Reduced chi-squared =         0.8341 for     57 degrees of freedom 
# Null hypothesis probability =   8.096709e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.883e-07   1.013e-07
25- 50  3.622e-07   1.951e-07
50-150  7.943e-07   4.268e-07
15-150  1.345e-06   7.363e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 12.1099        (-4.28207      2.39368)
R1^2/D10^2  : 5.08699E-02        (-0.023292      0.0437281)
kT2 [keV]   : 194.100        (-125.478      -125.478)
R2^2/D10^2  : 2.07349E-05    (-1.16e-05   0.00635461)
------------------------------------------------------------
# Chi-Squared =          44.09 using 59 PHA bins.
# Reduced chi-squared =         0.8017 for     55 degrees of freedom 
# Null hypothesis probability =   8.538796e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.259e-07   5.519e-08
25- 50  4.112e-07   1.738e-07
50-150  7.654e-07   2.430e-07
15-150  1.303e-06   4.112e-07

Peak spectrum fit

Power-law model
Time interval is from    6.196 sec. to    7.196 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.783989     ( -0.753074   0.622856 )
Norm@50keV  : 6.61813E-03    ( -0.00270398   0.00247128 )
------------------------------------------------------------
# Chi-Squared =          61.21 using 59 PHA bins.
# Reduced chi-squared =          1.074 for     57 degrees of freedom 
# Null hypothesis probability =   3.274303e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.761143 ( -0.274254  0.287378 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.78641e-08 ( -2.53963e-08  2.55039e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    6.196 sec. to    7.196 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.408839     ( -5.20405   -0.408472 )
Epeak [keV] : 296.921      ( -296.72 -296.72 )
Norm@50keV  : 8.92022E-03    ( -0.00481682   0.679818 )
------------------------------------------------------------
# Chi-Squared =          61.16 using 59 PHA bins.
# Reduced chi-squared =          1.092 for     56 degrees of freedom 
# Null hypothesis probability =   2.960774e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.742228 ( -0.3104  0.298702 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.74049e-07 ( -1.74049e-07  2.52621e-07 ) ergs/cm2
 
Band function
Time interval is from    6.196 sec. to    7.196 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.798630   ( 0.799734   0.799734 )
beta        : -0.783989    ( -0.623094   0.753093 )
Epeak [keV] : 14.9477      ( -14.9418 -14.9418 )
Norm@50keV   : 9.82175E-03    ( -0.00567115   0 )
------------------------------------------------------------
# Chi-Squared =          61.21 using 59 PHA bins.
# Reduced chi-squared =          1.113 for     55 degrees of freedom 
# Null hypothesis probability =   2.629975e-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]    : 30.0668  (-10.4012  27.4743)
R^2/D10^2   : 1.12157E-02  (-0.0112157   0.0299598)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared =          61.62 using 59 PHA bins.
# Reduced chi-squared =          1.081 for     57 degrees of freedom 
# Null hypothesis probability =   3.143467e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.584e-09   1.026e-09
25- 50  9.780e-09   5.950e-09
50-150  6.240e-08   3.903e-08
15-150  7.377e-08   4.657e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.999       (      )
Norm        : 3.35978       (-3.35978     -3.35978)
------------------------------------------------------------
# Chi-Squared =          65.69 using 59 PHA bins.
# Reduced chi-squared =          1.153 for     57 degrees of freedom 
# Null hypothesis probability =   2.010534e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.366e-09   4.922e-09
25- 50  1.609e-08   9.625e-09
50-150  3.529e-08   2.175e-08
15-150  5.975e-08   3.578e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.01802        (-4.81701      55.9058)
R1^2/D10^2  : 1.76744        (-1.91312      25.6265)
kT2 [keV]   : 34.2399        (-13.0306      -34.2358)
R2^2/D10^2  : 7.36833E-03    (-0.00735747   0.0221356)
------------------------------------------------------------
# Chi-Squared =          60.37 using 59 PHA bins.
# Reduced chi-squared =          1.098 for     55 degrees of freedom 
# Null hypothesis probability =   2.879664e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.602e-09   3.802e-09
25- 50  1.093e-08   5.875e-09
50-150  6.272e-08   3.704e-08
15-150  7.925e-08   4.478e-08
Plot creation:
Mon Aug 20 19:58:56 EDT 2012