batgrbproduct Analysis for Trigger=517566

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Tue Mar 13 05:32:50 EDT 2012
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger517566/GCN5_download_cron
======================================================================

  Trigger: 00517566      Segment: 000

  BAT Trigger Time: 353261196.736   [s; MET]
      Trigger Stop: 353261198.784   [s; MET]
               UTC: 2012-03-12T16:06:28.751080    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 251.764016821549   Dec: 23.8567031121096  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.22
     Image Trigger?:     NO
     Rate S/N Ratio:     13.1529464379659  [ if not an image trigger ]
     Image S/N Ratio:    8.22

  Flight Position:   [ source = BAT ]
    RA: 251.764016821549   Dec: 23.8567031121096  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 251.811934620112   Dec: 23.8808258554287  [deg; J2000]  
        { 16h 47m 14.9s , +23d 52' 51.0" }
         +/- 2.0181088245446 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.12904452184817 [arcmin] (formal 1-sigma fit error)
    SNR: 11.1553516128217
 
  Angular difference between Flight and Ground position is 3.001239 arcmin
 
  Partial Coding Fraction: 0.359375    [ including projection effects ]

  Duration
     T90: 13.904000043869 +/- 3.17495196556641
        Measured from: -0.887999892234802
                   to: 13.0160001516342     [s; relative to TRIGTIME]
     T50: 5.66400003433228 +/- 3.03076490335593
        Measured from: 0.952000141143799
                   to: 6.61600017547607     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.924000024795532     
                   to: 1.92400002479553     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -1.86400002241135     
                   to: 15.1280000209808     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.277150   0.348073   0.250468   0.067562
           0.045442   0.041355   0.034448   0.028842 [error]
 Peak      0.050838   0.046171   0.026360   0.025521
           0.011449   0.010560   0.009340   0.007114 [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 9.94e-08 1.57e-07 1.86e-07 4.31e-07 5.68e-07 8.74e-07   erg/cm2
              Error 2.15e-08 2.12e-08 3.36e-08 1.63e-07 8.07e-08 1.92e-07   erg/cm2
Peak flux Power-law 5.26e-01 4.21e-01 2.28e-01 1.79e-01 1.26e+00 1.35e+00   ph/cm2/s
              Error 1.96e-01 9.61e-02 7.98e-02 1.29e-01 2.90e-01 3.04e-01   ph/cm2/s
 
Fluence   Cutoff-PL 8.43e-08 1.71e-07 1.96e-07 1.44e-07 5.95e-07 0.00e+00   erg/cm2
              Error 2.71e-08 2.67e-08 3.85e-08 3.11e-07 2.40e-07 0.00e+00   erg/cm2
Peak flux Cutoff-PL 5.27e-01 4.22e-01 2.27e-01 1.78e-01 1.26e+00 1.35e+00   ph/cm2/s
              Error 1.96e-01 9.63e-02 7.99e-02 1.66e-01 2.87e-01 3.09e-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    1.750    0.231    -      -           3.62e-03 4.99e-04   60.540 57
CPL   0.822    1.155      63.2  -23.8      1.06e-02 2.29e-02   58.200 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.889    0.461    -      -           8.79e-03 2.32e-03   52.990 57
CPL   1.896    0.464    9999.4    0.0      8.78e-03 0.00e+00   52.990 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: 4.416000 sec.
T50 in the 50-300 keV band: 1.984000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   16.992   -1.864   15.128
T90    13.904   -0.888   13.016
T50     5.664    0.952    6.616
Peak    1.000    0.924    1.924

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  251.8119 +23.8808 0.0173   41.6  164.1       1.0241    11.2  TRIG_00517566       
------------------------------------------
 
Foreground time interval of the image:
 -1.864  15.128 (delta_t =  16.992 [sec])
Background time interval of the image:
-49.235  -1.864 (delta_t =  47.371 [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   -1.864 sec. to   15.128 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.74988     ( -0.226939   0.234192 )
Norm@50keV  : 3.62120E-03    ( -0.000501509   0.000495957 )
------------------------------------------------------------
# Chi-Squared =          60.54 using 59 PHA bins.
# Reduced chi-squared =          1.062 for     57 degrees of freedom 
# Null hypothesis probability =   3.494080e-01
 
Photon flux (15-150 keV)    in 16.99 sec: 0.489625 ( -0.0668811  0.0672088 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.67711e-07 ( -8.03207e-08  8.10882e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -1.864 sec. to   15.128 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.821913     ( -1.30707   1.00249 )
Epeak [keV] : 63.1949      ( -15.6579 -63.1947 )
Norm@50keV  : 1.05984E-02    ( -0.0105987   0.0351442 )
------------------------------------------------------------
# Chi-Squared =          58.20 using 59 PHA bins.
# Reduced chi-squared =          1.039 for     56 degrees of freedom 
# Null hypothesis probability =   3.944030e-01
 
Photon flux (15-150 keV)    in 16.99 sec: 0.466444 ( -0.072115  0.071939 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.94905e-07 ( -1.30626e-07  3.50373e-07 ) ergs/cm2
 
Band function
Time interval is from   -1.864 sec. to   15.128 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.821892   ( 1.04058   0.973739 )
beta        : -10.00000    ( 8.43746e+10   8.43746e+10 )
Epeak [keV] : 63.1829      ( -15.657 -63.183 )
Norm@50keV   : 1.05984E-02    ( -0.0105984   0.0351754 )
------------------------------------------------------------
# Chi-Squared =          58.20 using 59 PHA bins.
# Reduced chi-squared =          1.058 for     55 degrees of freedom 
# Null hypothesis probability =   3.584865e-01
 
Photon flux (15-150 keV)    in 16.99 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]    : 13.9898  (-1.85183  2.14382)
R^2/D10^2   : 6.85476E-02  (-0.0283208   0.0473502)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared =          65.03 using 59 PHA bins.
# Reduced chi-squared =          1.141 for     57 degrees of freedom 
# Null hypothesis probability =   2.173518e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.815e-08   1.212e-08
25- 50  1.790e-07   3.293e-08
50-150  2.305e-07   6.206e-08
15-150  4.576e-07   8.656e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 116.353       (-26.189      -100.276)
Norm        : 2.10429       (-0.342884     0.430282)
------------------------------------------------------------
# Chi-Squared =          58.74 using 59 PHA bins.
# Reduced chi-squared =          1.031 for     57 degrees of freedom 
# Null hypothesis probability =   4.115552e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.323e-08   1.815e-08
25- 50  1.659e-07   2.491e-08
50-150  2.915e-07   5.148e-08
15-150  5.506e-07   7.170e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 3.55194        (-2.07817      3.19526)
R1^2/D10^2  : 7.15437        (-6.72847      3735.82)
kT2 [keV]   : 16.2350        (-2.70671      4.32416)
R2^2/D10^2  : 3.62284E-02    (-0.0227971   0.0253864)
------------------------------------------------------------
# Chi-Squared =          56.20 using 59 PHA bins.
# Reduced chi-squared =          1.022 for     55 degrees of freedom 
# Null hypothesis probability =   4.295375e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.374e-08   4.699e-08
25- 50  1.577e-07   5.012e-08
50-150  2.639e-07   1.024e-07
15-150  5.154e-07   1.510e-07

Peak spectrum fit

Power-law model
Time interval is from    0.924 sec. to    1.924 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.88886     ( -0.436675   0.485968 )
Norm@50keV  : 8.79466E-03    ( -0.00240553   0.002238 )
------------------------------------------------------------
# Chi-Squared =          52.99 using 59 PHA bins.
# Reduced chi-squared =         0.9296 for     57 degrees of freedom 
# Null hypothesis probability =   6.262850e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.25620 ( -0.290113  0.29075 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.08486e-08 ( -2.07715e-08  2.11821e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.924 sec. to    1.924 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.89594     ( -0.445965   0.481299 )
Epeak [keV] : 9999.35      (   )
Norm@50keV  : 8.77823E-03    (     )
------------------------------------------------------------
# Chi-Squared =          52.99 using 59 PHA bins.
# Reduced chi-squared =         0.9463 for     56 degrees of freedom 
# Null hypothesis probability =   5.895169e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.25594 ( -0.284575  0.29029 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.15442e-07 ( -4.04208e-08  5.4918e-08 ) ergs/cm2
 
Band function
Time interval is from    0.924 sec. to    1.924 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.52540   ( 1.5254   1.5254 )
beta        : -1.88883    ( 1.88884   0.436632 )
Epeak [keV] : 12.9071      ( -12.9069 -12.9069 )
Norm@50keV   : 2.27997E-02    ( -0.0227999   13566.3 )
------------------------------------------------------------
# Chi-Squared =          52.99 using 59 PHA bins.
# Reduced chi-squared =         0.9634 for     55 degrees of freedom 
# Null hypothesis probability =   5.518562e-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]    : 10.0058  (-3.11509  5.42315)
R^2/D10^2   : 0.545336  (-0.428855   1.772)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared =          63.02 using 59 PHA bins.
# Reduced chi-squared =          1.106 for     57 degrees of freedom 
# Null hypothesis probability =   2.719907e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.112e-08   6.720e-09
25- 50  2.767e-08   1.391e-08
50-150  1.447e-08   8.948e-09
15-150  5.326e-08   2.821e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 99.6684       (-57.0976      -100.064)
Norm        : 5.40175       (-1.52788     2.7166)
------------------------------------------------------------
# Chi-Squared =          54.52 using 59 PHA bins.
# Reduced chi-squared =         0.9565 for     57 degrees of freedom 
# Null hypothesis probability =   5.687363e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.412e-08   4.576e-09
25- 50  2.440e-08   7.475e-09
50-150  3.946e-08   1.096e-08
15-150  7.798e-08   2.154e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.14548        (-2.73997      3.54904)
R1^2/D10^2  : 3.07928        (-2.52606      37.2151)
kT2 [keV]   : 36.9163        (-33.1556      -37.1017)
R2^2/D10^2  : 4.24805E-03    (-0.00409419   0.0183616)
------------------------------------------------------------
# Chi-Squared =          52.77 using 59 PHA bins.
# Reduced chi-squared =         0.9595 for     55 degrees of freedom 
# Null hypothesis probability =   5.603069e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.677e-08   9.825e-09
25- 50  2.204e-08   1.189e-08
50-150  4.706e-08   2.858e-08
15-150  8.588e-08   4.650e-08
Plot creation:
Tue Mar 13 06:05:05 EDT 2012