batgrbproduct Analysis for Trigger=505926

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Thu Oct 20 22:18:10 EDT 2011
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger505926/GCN5_download_cron
======================================================================

  Trigger: 00505926      Segment: 000

  BAT Trigger Time: 340785236.544   [s; MET]
      Trigger Stop: 340785236.8   [s; MET]
               UTC: 2011-10-20T06:33:49.058300    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 287.026652923869   Dec: -37.9849220218857  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.92
     Image Trigger?:     NO
     Rate S/N Ratio:     18.7349939951952  [ if not an image trigger ]
     Image S/N Ratio:    8.92

  Flight Position:   [ source = BAT ]
    RA: 287.026652923869   Dec: -37.9849220218857  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 287.028738753442   Dec: -38.0304965082623  [deg; J2000]  
        { 19h 08m 06.9s , -38d 01' 49.8" }
         +/- 2.05880077700079 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.977372119418623 [arcmin] (formal 1-sigma fit error)
    SNR: 10.8417132831382
 
  Angular difference between Flight and Ground position is 2.736247 arcmin
 
  Partial Coding Fraction: 0.7421875    [ including projection effects ]

  Duration
     T90: 0.400000035762787 +/- 0.0932952353877014
        Measured from: -0.0239999294281006
                   to: 0.376000106334686     [s; relative to TRIGTIME]
     T50: 0.192000031471252 +/- 0.0452548414137844
        Measured from: 0.0560001134872437
                   to: 0.248000144958496     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.316000044345856     
                   to: 0.683999955654144     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.0400000214576721     
                   to: 0.391999959945679     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.028069   0.038016   0.027575   0.010067
           0.005181   0.005220   0.004546   0.003502 [error]
 Peak      0.030602   0.036208   0.032530   0.007809
           0.007526   0.007196   0.006388   0.005152 [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 7.54e-09 1.50e-08 2.31e-08 7.82e-08 6.46e-08 1.24e-07   erg/cm2
              Error 1.99e-09 2.37e-09 4.22e-09 3.20e-08 1.04e-08 3.47e-08   erg/cm2
Peak flux Power-law 2.61e-01 2.82e-01 2.15e-01 2.69e-01 8.60e-01 1.03e+00   ph/cm2/s
              Error 9.33e-02 6.04e-02 5.20e-02 1.40e-01 1.69e-01 2.04e-01   ph/cm2/s
 
Fluence   Cutoff-PL 7.54e-09 1.50e-08 2.31e-08 7.76e-08 6.45e-08 1.22e-07   erg/cm2
              Error 1.99e-09 2.43e-09 4.21e-09 4.32e-08 1.04e-08 4.47e-08   erg/cm2
Peak flux Cutoff-PL 2.62e-01 2.82e-01 2.15e-01 2.67e-01 8.61e-01 1.02e+00   ph/cm2/s
              Error 9.32e-02 6.44e-02 5.54e-02 2.13e-01 1.71e-01 2.48e-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    1.374    0.260    -      -           1.54e-02 2.23e-03   45.720 57
CPL   1.365    1.243    9557.7    0.0      1.55e-02 1.04e-02   45.730 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.386    0.356    -      -           7.08e-03 1.38e-03   65.490 57
CPL   1.383    1.852    9999.3    0.0      7.11e-03 1.35e-02   65.490 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    0.432   -0.040    0.392
T90     0.400   -0.024    0.376
T50     0.192    0.056    0.248
Peak    1.000   -0.316    0.684

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  287.0287 -38.0305 0.0177   18.4   68.6       0.1063    10.8  TRIG_00505926       
------------------------------------------
 
Foreground time interval of the image:
 -0.040   0.392 (delta_t =   0.432 [sec])
Background time interval of the image:
-28.443  -0.040 (delta_t =  28.403 [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   -0.040 sec. to    0.392 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.37357     ( -0.260678   0.258834 )
Norm@50keV  : 1.53900E-02    ( -0.00223007   0.00222431 )
------------------------------------------------------------
# Chi-Squared =          45.72 using 59 PHA bins.
# Reduced chi-squared =         0.8021 for     57 degrees of freedom 
# Null hypothesis probability =   8.581709e-01
 
Photon flux (15-150 keV)    in 0.432 sec: 1.86328 ( -0.276485  0.277286 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.45991e-08 ( -1.03368e-08  1.04418e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.040 sec. to    0.392 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.36540     ( -0.71838   1.767 )
Epeak [keV] : 9557.66      ( -1029.46 -1029.46 )
Norm@50keV  : 1.54529E-02    ( -0.00224474   0.0184582 )
------------------------------------------------------------
# Chi-Squared =          45.73 using 59 PHA bins.
# Reduced chi-squared =         0.8165 for     56 degrees of freedom 
# Null hypothesis probability =   8.348498e-01
 
Photon flux (15-150 keV)    in 0.432 sec: 1.86495 ( -0.27872  0.27344 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.44738e-08 ( -1.02185e-08  1.05067e-08 ) ergs/cm2
 
Band function
Time interval is from   -0.040 sec. to    0.392 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.76333   ( -10.0285   -10.0285 )
beta        : -1.42858    ( -0.299223   0.284309 )
Epeak [keV] : 23.5290      ( -23.5289 6.16959 )
Norm@50keV   : 1401.70    ( -1400.94   457.877 )
------------------------------------------------------------
# Chi-Squared =          45.25 using 59 PHA bins.
# Reduced chi-squared =         0.8228 for     55 degrees of freedom 
# Null hypothesis probability =   8.228427e-01
 
Photon flux (15-150 keV)    in 0.432 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]    : 16.4229  (-3.88559  5.48309)
R^2/D10^2   : 0.152048  (-0.149258   0.233098)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared =          64.22 using 59 PHA bins.
# Reduced chi-squared =          1.127 for     57 degrees of freedom 
# Null hypothesis probability =   2.384281e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.641e-09   1.234e-09
25- 50  1.566e-08   3.927e-09
50-150  2.981e-08   9.476e-09
15-150  4.911e-08   1.186e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.998       (      )
Norm        : 7.70219       (-7.70219     -7.70219)
------------------------------------------------------------
# Chi-Squared =          47.80 using 59 PHA bins.
# Reduced chi-squared =         0.8385 for     57 degrees of freedom 
# Null hypothesis probability =   8.023179e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.284e-09   4.501e-09
25- 50  1.594e-08   8.739e-09
50-150  3.495e-08   1.915e-08
15-150  5.917e-08   3.249e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.67215        (-2.18433      2.68196)
R1^2/D10^2  : 1.57443        (-1.01704      3.57012)
kT2 [keV]   : 39.6684        (-14.4652      100.709)
R2^2/D10^2  : 7.25258E-03    (-0.00677178   0.0230338)
------------------------------------------------------------
# Chi-Squared =          43.77 using 59 PHA bins.
# Reduced chi-squared =         0.7959 for     55 degrees of freedom 
# Null hypothesis probability =   8.618627e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.645e-09   4.312e-09
25- 50  1.574e-08   8.621e-09
50-150  4.380e-08   2.428e-08
15-150  6.718e-08   3.443e-08

Peak spectrum fit

Power-law model
Time interval is from   -0.316 sec. to    0.684 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.38581     ( -0.356629   0.355882 )
Norm@50keV  : 7.08496E-03    ( -0.00138067   0.00137229 )
------------------------------------------------------------
# Chi-Squared =          65.49 using 59 PHA bins.
# Reduced chi-squared =          1.149 for     57 degrees of freedom 
# Null hypothesis probability =   2.059864e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.860077 ( -0.169135  0.169865 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.86611e-08 ( -1.4826e-08  1.51081e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.316 sec. to    0.684 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.38261     ( -1.32889   2.37485 )
Epeak [keV] : 9999.27      (   )
Norm@50keV  : 7.11105E-03    ( -0.00137332   0.0255843 )
------------------------------------------------------------
# Chi-Squared =          65.49 using 59 PHA bins.
# Reduced chi-squared =          1.169 for     56 degrees of freedom 
# Null hypothesis probability =   1.807055e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.860594 ( -0.17402  0.168646 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.84704e-08 ( -1.57829e-08  1.52281e-08 ) ergs/cm2
 
Band function
Time interval is from   -0.316 sec. to    0.684 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.99998   ( -102490   -102490 )
beta        : -1.40646    ( -0.389844   0.36879 )
Epeak [keV] : 21.1189      ( -20.4551 11.8067 )
Norm@50keV   : 1901.08    ( -2331.61   4.12529e+06 )
------------------------------------------------------------
# Chi-Squared =          65.44 using 59 PHA bins.
# Reduced chi-squared =          1.190 for     55 degrees of freedom 
# Null hypothesis probability =   1.583565e-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]    : 17.0578  (-4.32537  6.0846)
R^2/D10^2   : 6.24342E-02  (-0.0396345   0.107505)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared =          73.06 using 59 PHA bins.
# Reduced chi-squared =          1.282 for     57 degrees of freedom 
# Null hypothesis probability =   7.440023e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.696e-09   1.627e-09
25- 50  1.640e-08   6.243e-09
50-150  3.410e-08   1.433e-08
15-150  5.420e-08   2.277e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (-92.8244      -200)
Norm        : 3.54286       (-0.682656     0.682656)
------------------------------------------------------------
# Chi-Squared =          66.35 using 59 PHA bins.
# Reduced chi-squared =          1.164 for     57 degrees of freedom 
# Null hypothesis probability =   1.857829e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.822e-09   4.960e-09
25- 50  1.697e-08   9.430e-09
50-150  3.722e-08   2.061e-08
15-150  6.301e-08   3.499e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.37884        (-3.96927      5.84483)
R1^2/D10^2  : 1.16573        (-1.01355      105.651)
kT2 [keV]   : 27.8184        (-10.732      157.167)
R2^2/D10^2  : 1.03706E-02    (-0.0102313   0.0467388)
------------------------------------------------------------
# Chi-Squared =          65.70 using 59 PHA bins.
# Reduced chi-squared =          1.195 for     55 degrees of freedom 
# Null hypothesis probability =   1.531065e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.160e-09   4.905e-09
25- 50  1.562e-08   8.220e-09
50-150  4.490e-08   2.683e-08
15-150  6.868e-08   3.739e-08
Plot creation:
Thu Oct 20 22:39:37 EDT 2011