batgrbproduct Analysis for Trigger=518507

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Sun Mar 25 22:23:22 EDT 2012
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger518507/GCN5_download_cron
======================================================================

  Trigger: 00518507      Segment: 000

  BAT Trigger Time: 354261559.36   [s; MET]
      Trigger Stop: 354261560.384   [s; MET]
               UTC: 2012-03-24T05:59:11.334460    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 291.084059291849   Dec: 24.1452774141341  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    19.05
     Image Trigger?:     NO
     Rate S/N Ratio:     89.9388681271896  [ if not an image trigger ]
     Image S/N Ratio:    19.05

  Flight Position:   [ source = BAT ]
    RA: 291.084059291849   Dec: 24.1452774141341  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 291.08119668687   Dec: 24.1399319535257  [deg; J2000]  
        { 19h 24m 19.5s , +24d 08' 23.8" }
         +/- 1.11729928446938 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.454369004181627 [arcmin] (formal 1-sigma fit error)
    SNR: 25.9600054362593
 
  Angular difference between Flight and Ground position is 0.356975 arcmin
 
  Partial Coding Fraction: 0.8203125    [ including projection effects ]

  Duration
     T90: 117.963999986649 +/- 9.59318427639077
        Measured from: -41.6959999203682
                   to: 76.2680000662804     [s; relative to TRIGTIME]
     T50: 30.7759999632835 +/- 0.714579609466133
        Measured from: 3.98000007867813
                   to: 34.7560000419617     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 33.6759999990463     
                   to: 34.6759999990463     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -150.512000024319     
                   to: 142.455999970436     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     3.715155   5.334103   4.716206   1.489929
           0.105341   0.102618   0.088465   0.073478 [error]
 Peak      0.145096   0.249481   0.259175   0.077013
           0.007659   0.008720   0.008701   0.006034 [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 1.13e-06 2.29e-06 3.63e-06 1.28e-05 1.01e-05 1.98e-05   erg/cm2
              Error 5.82e-08 6.78e-08 9.33e-08 7.97e-07 2.36e-07 8.24e-07   erg/cm2
Peak flux Power-law 1.53e+00 1.87e+00 1.65e+00 2.52e+00 5.93e+00 7.57e+00   ph/cm2/s
              Error 1.16e-01 8.54e-02 6.92e-02 2.28e-01 2.31e-01 2.95e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.13e-06 2.29e-06 3.64e-06 1.27e-05 1.98e-05 0.00e+00   erg/cm2
              Error 5.81e-08 6.77e-08 9.34e-08 8.90e-07 8.93e-07 0.00e+00   erg/cm2
Peak flux Cutoff-PL 1.47e+00 1.88e+00 1.68e+00 2.16e+00 5.88e+00 7.20e+00   ph/cm2/s
              Error 1.50e-01 8.97e-02 8.60e-02 4.98e-01 2.41e-01 5.66e-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    1.336    0.045    -      -           3.54e-03 8.19e-05   44.580 57
CPL   1.331    0.085    9227.6 -188.2      3.55e-03 2.63e-04   44.630 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.177    0.066    -      -           5.06e-02 1.89e-03   56.480 57
CPL   1.024    0.230     369.8    0.0      5.92e-02 1.41e-02   55.400 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: 97.920000 sec.
T50 in the 50-300 keV band: 29.888000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  292.968 -150.512  142.456
T90   117.964  -41.696   76.268
T50    30.776    3.980   34.756
Peak    1.000   33.676   34.676

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  291.0812 +24.1399 0.0074   30.9 -160.9       6.1646    26.0  TRIG_00518507       
------------------------------------------
 
Foreground time interval of the image:
-150.512 -55.890 (delta_t =  94.622 [sec])
-54.360  11.941 (delta_t =  66.301 [sec])
Background time interval of the image:
-239.360 -150.512 (delta_t =  88.848 [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
Multiple GTIs in the spectrum
tstart tstop
-150.512000 -55.890000
-54.360000 142.456000
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.33563     ( -0.0446905   0.0445196 )
Norm@50keV  : 3.53765E-03    ( -8.19701e-05   8.18372e-05 )
------------------------------------------------------------
# Chi-Squared =          44.58 using 59 PHA bins.
# Reduced chi-squared =         0.7822 for     57 degrees of freedom 
# Null hypothesis probability =   8.841953e-01
 
Photon flux (15-150 keV)    in 291.4 sec: 0.424946 ( -0.0112015  0.011244 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.01012e-05 ( -2.35852e-07  2.36038e-07 ) ergs/cm2
 
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-150.512000 -55.890000
-54.360000 142.456000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.33112     ( -0.125492   0.0449033 )
Epeak [keV] : 9227.59      ( -635.614 -1011.94 )
Norm@50keV  : 3.55403E-03    ( -8.09814e-05   0.000445862 )
------------------------------------------------------------
# Chi-Squared =          44.63 using 59 PHA bins.
# Reduced chi-squared =         0.7970 for     56 degrees of freedom 
# Null hypothesis probability =   8.627341e-01
 
Photon flux (15-150 keV)    in 291.4 sec: 0.424631 ( -0.011121  0.009842 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.97638e-05 ( -9.56841e-07  8.28916e-07 ) ergs/cm2
 
Band function
Multiple GTIs in the spectrum
tstart tstop
-150.512000 -55.890000
-54.360000 142.456000
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.03510   ( 1.03231   1.03231 )
beta        : -1.33579    ( 1.33583   0.0448498 )
Epeak [keV] : 57.8064      ( -59.0048 -59.0048 )
Norm@50keV   : 6.49607E-03    ( -0.00222173   268950 )
------------------------------------------------------------
# Chi-Squared =          44.58 using 59 PHA bins.
# Reduced chi-squared =         0.8106 for     55 degrees of freedom 
# Null hypothesis probability =   8.412270e-01
 
Photon flux (15-150 keV)    in 291.4 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]    : 19.8094  (  )
R^2/D10^2   : 1.85728E-02  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared =         459.37 using 59 PHA bins.
# Reduced chi-squared =         8.0591 for     57 degrees of freedom 
# Null hypothesis probability =   2.995976e-64
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.110e-07   1.894e-08
25- 50  2.034e-06   7.751e-08
50-150  5.909e-06   2.142e-07
15-150  8.354e-06   2.011e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (      )
Norm        : 1.81570       (     )
------------------------------------------------------------
# Chi-Squared =         149.68 using 59 PHA bins.
# Reduced chi-squared =         2.6259 for     57 degrees of freedom 
# Null hypothesis probability =   2.963066e-10
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.317e-06   6.691e-07
25- 50  2.534e-06   1.284e-06
50-150  5.558e-06   2.813e-06
15-150  9.410e-06   4.764e-06
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.44827        (-0.740086      0.785218)
R1^2/D10^2  : 0.215506        (-0.0541833      0.0784692)
kT2 [keV]   : 35.2892        (-3.33487      4.44163)
R2^2/D10^2  : 2.30033E-03    (-0.000717409   0.000891655)
------------------------------------------------------------
# Chi-Squared =          54.00 using 59 PHA bins.
# Reduced chi-squared =         0.9818 for     55 degrees of freedom 
# Null hypothesis probability =   5.128223e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.591e-07   7.999e-08
25- 50  2.386e-06   1.166e-07
50-150  6.757e-06   3.919e-07
15-150  1.010e-05   5.041e-07

Peak spectrum fit

Power-law model
Time interval is from   33.676 sec. to   34.676 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.17705     ( -0.0665041   0.0663139 )
Norm@50keV  : 5.06482E-02    ( -0.00189027   0.00188937 )
------------------------------------------------------------
# Chi-Squared =          56.48 using 59 PHA bins.
# Reduced chi-squared =         0.9910 for     57 degrees of freedom 
# Null hypothesis probability =   4.943677e-01
 
Photon flux (15-150 keV)    in 1 sec: 5.92658 ( -0.231072  0.23138 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.17238e-07 ( -2.09372e-08  2.09763e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   33.676 sec. to   34.676 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.02447     ( -0.262624   0.197075 )
Epeak [keV] : 369.823      ( -369.823 -369.823 )
Norm@50keV  : 5.92078E-02    ( -0.0106661   0.0176065 )
------------------------------------------------------------
# Chi-Squared =          55.40 using 59 PHA bins.
# Reduced chi-squared =         0.9894 for     56 degrees of freedom 
# Null hypothesis probability =   4.973552e-01
 
Photon flux (15-150 keV)    in 1 sec: 5.88405 ( -0.24041  0.24072 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.92357e-07 ( -1.74549e-07  1.98903e-07 ) ergs/cm2
 
Band function
Time interval is from   33.676 sec. to   34.676 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 8.17315E-02   ( -1.60184   -1.60184 )
beta        : -1.21260    ( 1.21111   0.0825108 )
Epeak [keV] : 48.2289      ( -48.1387 198.966 )
Norm@50keV   : 0.362972    ( -0.370349   1891.03 )
------------------------------------------------------------
# Chi-Squared =          54.94 using 59 PHA bins.
# Reduced chi-squared =         0.9989 for     55 degrees of freedom 
# Null hypothesis probability =   4.770104e-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]    : 20.5737  (  )
R^2/D10^2   : 0.250557  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared =         197.19 using 59 PHA bins.
# Reduced chi-squared =         3.4595 for     57 degrees of freedom 
# Null hypothesis probability =   2.467431e-17
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.021e-08   1.480e-09
25- 50  1.026e-07   5.320e-09
50-150  3.229e-07   1.935e-08
15-150  4.457e-07   2.155e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (      )
Norm        : 24.7519       (     )
------------------------------------------------------------
# Chi-Squared =         149.61 using 59 PHA bins.
# Reduced chi-squared =         2.6247 for     57 degrees of freedom 
# Null hypothesis probability =   3.032353e-10
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.163e-08   3.163e-08
25- 50  1.186e-07   6.080e-08
50-150  2.600e-07   1.333e-07
15-150  4.402e-07   2.252e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.40696        (-1.01397      1.1921)
R1^2/D10^2  : 3.97312        (-1.527      2.65004)
kT2 [keV]   : 31.4644        (-3.2883      4.6106)
R2^2/D10^2  : 5.45139E-02    (-0.0197043   0.0245068)
------------------------------------------------------------
# Chi-Squared =          54.21 using 59 PHA bins.
# Reduced chi-squared =         0.9856 for     55 degrees of freedom 
# Null hypothesis probability =   5.049573e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.519e-08   6.745e-09
25- 50  1.079e-07   1.023e-08
50-150  3.646e-07   3.865e-08
15-150  5.177e-07   5.165e-08
Plot creation:
Sun Mar 25 22:55:36 EDT 2012