batgrbproduct Analysis for Trigger=521085

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Sun Apr 29 06:17:31 EDT 2012
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger521085/GCN5_download_cron
======================================================================

  Trigger: 00521085      Segment: 000

  BAT Trigger Time: 357321040   [s; MET]
      Trigger Stop: 357321376   [s; MET]
               UTC: 2012-04-28T15:50:31.849800    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 248.519397311819   Dec: -47.4111418052543  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    8.8
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    8.8

  Flight Position:   [ source = BAT ]
    RA: 248.519397311819   Dec: -47.4111418052543  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 248.498434567509   Dec: -47.4348971681897  [deg; J2000]  
        { 16h 33m 59.6s , -47d 26' 05.6" }
         +/- 3.57586673349822 [arcmin] (estimated 90% radius based on SNR)
         +/- 2.60805010546752 [arcmin] (formal 1-sigma fit error)
    SNR: 4.92689866560768
 
  Angular difference between Flight and Ground position is 1.660032 arcmin
 
  Partial Coding Fraction: 1.015625    [ including projection effects ]

  Duration
     T90: 336 +/- 
        Measured from: 0
                   to: 336     [s; relative to TRIGTIME]
     T50: 336 +/- 
        Measured from: 0
                   to: 336     [s; relative to TRIGTIME]

    WARNING: battblocks failed.  Used TDRSS fore/background intervals

  Fluence
     Peak Flux  (peak 336 second)
        Measured from: 0     
                   to: 336     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0     
                   to: 336     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.794188   0.629174   0.123453   0.037804
           0.102712   0.096664   0.080680   0.068298 [error]
 Peak      0.794188   0.629174   0.123453   0.037804
           0.102712   0.096664   0.080680   0.068298 [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 2.52e-07 2.20e-07 1.32e-07 1.19e-07 6.54e-07 7.22e-07   erg/cm2
              Error 4.90e-08 4.80e-08 6.05e-08 1.02e-07 1.44e-07 2.01e-07   erg/cm2
Peak flux Power-law 2.48e-02 1.21e-02 3.63e-03 1.38e-03 4.14e-02 4.19e-02   ph/cm2/s
              Error 4.95e-03 2.53e-03 1.62e-03 1.11e-03 6.84e-03 7.02e-03   ph/cm2/s
 
Fluence   Cutoff-PL 2.49e-07 2.33e-07 1.06e-07 2.50e-08 6.13e-07 0.00e+00   erg/cm2
              Error 5.15e-08 6.22e-08 8.20e-08 1.19e-07 2.31e-07 0.00e+00   erg/cm2
Peak flux Cutoff-PL 2.43e-02 1.29e-02 3.02e-03 3.65e-04 4.06e-02 4.15e-02   ph/cm2/s
              Error 5.30e-03 3.37e-03 2.17e-03 1.33e-03 5.21e-03 7.64e-03   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    2.739    0.429    -      -           1.80e-04 6.12e-05   59.590 57
CPL   1.938    0.000       2.5    0.0      6.23e-04 0.00e+00   59.270 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.739    0.429    -      -           1.80e-04 6.12e-05   59.590 57
CPL   1.938    0.000       2.5    0.0      6.23e-04 0.00e+00   59.270 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  336.000    0.000  336.000
T90   336.000    0.000  336.000
T50   336.000    0.000  336.000
Peak  336.000    0.000  336.000

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  248.4984 -47.4349 0.0390    6.8  169.3       1.3588     4.9  TRIG_00521085       
------------------------------------------
 
Foreground time interval of the image:
  0.000 336.000 (delta_t = 336.000 [sec])
Background time interval of the image:

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    0.000 sec. to  336.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.73947     ( -0.390678   0.466763 )
Norm@50keV  : 1.80472E-04    ( -6.04474e-05   6.20503e-05 )
------------------------------------------------------------
# Chi-Squared =          59.59 using 59 PHA bins.
# Reduced chi-squared =          1.045 for     57 degrees of freedom 
# Null hypothesis probability =   3.817395e-01
 
Photon flux (15-150 keV)    in 336 sec: 4.13532E-02 ( -0.0068407  0.00684557 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.54232e-07 ( -1.39154e-07  1.49514e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to  336.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.93784     (     )
Epeak [keV] : 2.49032      (   )
Norm@50keV  : 6.22959E-04    (     )
------------------------------------------------------------
# Chi-Squared =          59.27 using 59 PHA bins.
# Reduced chi-squared =          1.058 for     56 degrees of freedom 
# Null hypothesis probability =   3.570936e-01
 
Photon flux (15-150 keV)    in 336 sec: 4.05797E-02 ( -0.0069479  0.0034802 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.13344e-07 ( -1.46247e-07  3.15003e-07 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to  336.000 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.73112   ( 1.74128   1.74128 )
beta        : -3.36069    ( 3.36883   0.988692 )
Epeak [keV] : 8.35495      ( -8.02015 8.56552 )
Norm@50keV   : 8.70985E-04    ( -0.000348419   9.39916 )
------------------------------------------------------------
# Chi-Squared =          59.17 using 59 PHA bins.
# Reduced chi-squared =          1.076 for     55 degrees of freedom 
# Null hypothesis probability =   3.260570e-01
 
Photon flux (15-150 keV)    in 336 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]    : 6.46979  (-1.07709  1.22695)
R^2/D10^2   : 0.107942  (-0.0566283   0.12967)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared =          62.66 using 59 PHA bins.
# Reduced chi-squared =          1.099 for     57 degrees of freedom 
# Null hypothesis probability =   2.825089e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.231e-07   7.725e-08
25- 50  2.610e-07   7.830e-08
50-150  3.224e-08   2.038e-08
15-150  5.162e-07   1.389e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 23.7833       (-7.63062      12.5698)
Norm        : 0.410763       (-0.13899     0.239728)
------------------------------------------------------------
# Chi-Squared =          59.46 using 59 PHA bins.
# Reduced chi-squared =          1.043 for     57 degrees of freedom 
# Null hypothesis probability =   3.861093e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.445e-07   6.601e-08
25- 50  2.425e-07   7.431e-08
50-150  9.574e-08   6.086e-08
15-150  5.827e-07   1.572e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 1.69735        (-1.1578      1.48098)
R1^2/D10^2  : 99.5839        (-183.18      -184.837)
kT2 [keV]   : 7.60758        (-1.41551      1.95506)
R2^2/D10^2  : 4.79175E-02    (-0.0339475   0.0763702)
------------------------------------------------------------
# Chi-Squared =          56.51 using 59 PHA bins.
# Reduced chi-squared =          1.027 for     55 degrees of freedom 
# Null hypothesis probability =   4.185022e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.272e-07   1.081e-07
25- 50  2.599e-07   1.507e-07
50-150  5.751e-08   4.116e-08
15-150  5.446e-07   2.838e-07

Peak spectrum fit

Power-law model
Time interval is from    0.000 sec. to  336.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.73947     ( -0.390678   0.466763 )
Norm@50keV  : 1.80472E-04    ( -6.04474e-05   6.20503e-05 )
------------------------------------------------------------
# Chi-Squared =          59.59 using 59 PHA bins.
# Reduced chi-squared =          1.045 for     57 degrees of freedom 
# Null hypothesis probability =   3.817395e-01
 
Photon flux (15-150 keV)    in 336 sec: 4.13532E-02 ( -0.0068407  0.00684557 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.54232e-07 ( -1.39154e-07  1.49514e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to  336.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.93784     (     )
Epeak [keV] : 2.49032      (   )
Norm@50keV  : 6.22959E-04    (     )
------------------------------------------------------------
# Chi-Squared =          59.27 using 59 PHA bins.
# Reduced chi-squared =          1.058 for     56 degrees of freedom 
# Null hypothesis probability =   3.570936e-01
 
Photon flux (15-150 keV)    in 336 sec: 4.05797E-02 ( -0.0069479  0.0034802 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.13344e-07 ( -1.46247e-07  3.15003e-07 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to  336.000 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.73112   ( 1.74128   1.74128 )
beta        : -3.36069    ( 3.36883   0.988692 )
Epeak [keV] : 8.35495      ( -8.02015 8.58485 )
Norm@50keV   : 8.70985E-04    ( -0.000348419   8.36757 )
------------------------------------------------------------
# Chi-Squared =          59.17 using 59 PHA bins.
# Reduced chi-squared =          1.076 for     55 degrees of freedom 
# Null hypothesis probability =   3.260570e-01
 
Photon flux (15-150 keV)    in 336 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]    : 6.46979  (-1.07709  1.22695)
R^2/D10^2   : 0.107942  (-0.0566283   0.12967)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared =          62.66 using 59 PHA bins.
# Reduced chi-squared =          1.099 for     57 degrees of freedom 
# Null hypothesis probability =   2.825089e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.231e-07   7.587e-08
25- 50  2.610e-07   8.701e-08
50-150  3.224e-08   1.977e-08
15-150  5.162e-07   1.496e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 23.7833       (-7.63062      12.5698)
Norm        : 0.410763       (-0.13899     0.239728)
------------------------------------------------------------
# Chi-Squared =          59.46 using 59 PHA bins.
# Reduced chi-squared =          1.043 for     57 degrees of freedom 
# Null hypothesis probability =   3.861093e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.445e-07   5.809e-08
25- 50  2.425e-07   6.982e-08
50-150  9.574e-08   6.064e-08
15-150  5.827e-07   1.542e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 1.69735        (-1.1578      1.48098)
R1^2/D10^2  : 99.5839        (-183.18      -184.837)
kT2 [keV]   : 7.60758        (-1.41551      1.95506)
R2^2/D10^2  : 4.79175E-02    (-0.0339475   0.0763702)
------------------------------------------------------------
# Chi-Squared =          56.51 using 59 PHA bins.
# Reduced chi-squared =          1.027 for     55 degrees of freedom 
# Null hypothesis probability =   4.185022e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.272e-07   1.150e-07
25- 50  2.599e-07   1.474e-07
50-150  5.751e-08   3.963e-08
15-150  5.446e-07   2.853e-07
Plot creation:
Sun Apr 29 06:40:46 EDT 2012