batgrbproduct Analysis for Trigger=453747

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Sat May 21 09:35:09 EDT 2011
             Host Name: gcn5
   Current Working Dir: /Home/eud/batgroup/grb_auto_proc_temp/trigger453747
======================================================================

  Trigger: 00453747      Segment: 000

  BAT Trigger Time: 327616135.168   [s; MET]
      Trigger Stop: 327616137.216   [s; MET]
               UTC: 2011-05-20T20:28:48.193920    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 134.375117604516   Dec: 56.401895388955  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.87
     Image Trigger?:     NO
     Rate S/N Ratio:     15.9059737205869  [ if not an image trigger ]
     Image S/N Ratio:    7.87

  Flight Position:   [ source = BAT ]
    RA: 134.375117604516   Dec: 56.401895388955  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 134.36295513383   Dec: 56.4180302725439  [deg; J2000]  
        { 08h 57m 27.1s , +56d 25' 04.9" }
         +/- 1.10897259170223 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.315192398758785 [arcmin] (formal 1-sigma fit error)
    SNR: 26.2389100333325
 
  Angular difference between Flight and Ground position is 1.048905 arcmin
 
  Partial Coding Fraction: 0.6953125    [ including projection effects ]

  Duration
     T90: 15.6799999475479 +/- 1.80279781551004
        Measured from: -0.279999971389771
                   to: 15.3999999761581     [s; relative to TRIGTIME]
     T50: 7.23599994182587 +/- 0.882806864520696
        Measured from: 2.432000041008
                   to: 9.66799998283386     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 4.15200001001358     
                   to: 5.15200001001358     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -1.21999996900558     
                   to: 16.6400000452995     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.284627   0.547103   0.522720   0.126729
           0.030069   0.031155   0.028296   0.023994 [error]
 Peak      0.032805   0.046010   0.046160   0.009821
           0.007097   0.007530   0.006997   0.005838 [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 9.35e-08 2.15e-07 3.92e-07 1.70e-06 1.07e-06 2.41e-06   erg/cm2
              Error 1.13e-08 1.56e-08 2.67e-08 2.62e-07 6.90e-08 2.76e-07   erg/cm2
Peak flux Power-law 2.80e-01 3.40e-01 2.99e-01 4.51e-01 1.08e+00 1.37e+00   ph/cm2/s
              Error 8.60e-02 6.42e-02 5.47e-02 1.75e-01 1.77e-01 2.32e-01   ph/cm2/s
 
Fluence   Cutoff-PL 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 Cutoff-PL 2.60e-01 3.50e-01 3.11e-01 3.09e-01 1.06e+00 1.23e+00   ph/cm2/s
              Error 1.02e-01 7.22e-02 6.50e-02 3.14e-01 1.82e-01 3.22e-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    1.133    0.105    -      -           5.77e-03 3.50e-04   52.480 57
CPL   0.651    0.444     156.0  295.5      9.60e-03 4.60e-03   48.590 56
 
The chi2 of BB fit is  which shows a significant improvement in the fit over a PL.
Check the BB fit.
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.187    0.276    -      -           9.19e-03 1.47e-03   49.310 57
CPL   0.833    0.921     178.1    0.0      1.35e-02 2.16e-02   48.960 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: 15.168000 sec.
T50 in the 50-300 keV band: 7.104000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   17.860   -1.220   16.640
T90    15.680   -0.280   15.400
T50     7.236    2.432    9.668
Peak    1.000    4.152    5.152

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  134.3630 +56.4180 0.0074   30.1   14.8       1.5457    26.2  TRIG_00453747       
------------------------------------------
 
Foreground time interval of the image:
 -1.220  16.640 (delta_t =  17.860 [sec])
Background time interval of the image:
-239.168  -1.220 (delta_t = 237.948 [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   -1.220 sec. to   16.640 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.13342     ( -0.105376   0.103736 )
Norm@50keV  : 5.77459E-03    ( -0.000349696   0.000349324 )
------------------------------------------------------------
# Chi-Squared =          52.48 using 59 PHA bins.
# Reduced chi-squared =         0.9208 for     57 degrees of freedom 
# Null hypothesis probability =   6.450053e-01
 
Photon flux (15-150 keV)    in 17.86 sec: 0.672147 ( -0.0423746  0.0424646 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.06707e-06 ( -6.88696e-08  6.90857e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -1.220 sec. to   16.640 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.651019     ( -0.468149   0.420268 )
Epeak [keV] : 156.006      ( -50.7131 540.279 )
Norm@50keV  : 9.60387E-03    ( -0.00336854   0.00582817 )
------------------------------------------------------------
# Chi-Squared =          48.59 using 59 PHA bins.
# Reduced chi-squared =         0.8677 for     56 degrees of freedom 
# Null hypothesis probability =   7.484657e-01
 
Photon flux (15-150 keV)    in 17.86 sec: 0.658217 ( -0.044098  0.044119 ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 
Band function
Time interval is from   -1.220 sec. to   16.640 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 0.153641   ( -0.909005   0.0703045 )
beta        : -1.32061    ( -0.572426   0.198727 )
Epeak [keV] : 68.0608      ( -39.4393 175.741 )
Norm@50keV   : 3.03144E-02    ( -0.0313671   67.5029 )
------------------------------------------------------------
# Chi-Squared =          47.59 using 59 PHA bins.
# Reduced chi-squared =         0.8653 for     55 degrees of freedom 
# Null hypothesis probability =   7.506917e-01
 
Photon flux (15-150 keV)    in 17.86 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]    :   (  )
R^2/D10^2   :   (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25     
25- 50     
50-150     
15-150     
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    :        (      )
Norm        :        (     )
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25     
25- 50     
50-150     
15-150     
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   :         (      )
R1^2/D10^2  :         (      )
kT2 [keV]   :         (      )
R2^2/D10^2  :     (   )
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25     
25- 50     
50-150     
15-150     

Peak spectrum fit

Power-law model
Time interval is from    4.152 sec. to    5.152 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.18692     ( -0.279709   0.272993 )
Norm@50keV  : 9.19254E-03    ( -0.00146951   0.00146928 )
------------------------------------------------------------
# Chi-Squared =          49.31 using 59 PHA bins.
# Reduced chi-squared =         0.8651 for     57 degrees of freedom 
# Null hypothesis probability =   7.555691e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.07707 ( -0.177187  0.177706 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.36117e-08 ( -1.64277e-08  1.65947e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    4.152 sec. to    5.152 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.833414     ( -1.25918   0.583048 )
Epeak [keV] : 178.080      ( -178.087 -178.087 )
Norm@50keV  : 1.35493E-02    ( -0.00566323   0.0375345 )
------------------------------------------------------------
# Chi-Squared =          48.96 using 59 PHA bins.
# Reduced chi-squared =         0.8744 for     56 degrees of freedom 
# Null hypothesis probability =   7.360265e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.06310 ( -0.182111  0.18202 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.17658e-08 ( -1.77619e-08  1.74812e-08 ) ergs/cm2
 
Band function
Time interval is from    4.152 sec. to    5.152 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.95368   ( -43.2219   -43.2219 )
beta        : -1.26357    ( -0.328325   0.310549 )
Epeak [keV] : 26.0549      ( -26.0531 12.197 )
Norm@50keV   : 548.108    ( -545.367   394.619 )
------------------------------------------------------------
# Chi-Squared =          48.23 using 59 PHA bins.
# Reduced chi-squared =         0.8770 for     55 degrees of freedom 
# Null hypothesis probability =   7.288958e-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]    :   (  )
R^2/D10^2   :   (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25     
25- 50     
50-150     
15-150     
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    :        (      )
Norm        :        (     )
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25     
25- 50     
50-150     
15-150     
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   :         (      )
R1^2/D10^2  :         (      )
kT2 [keV]   :         (      )
R2^2/D10^2  :     (   )
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25     
25- 50     
50-150     
15-150     
Plot creation:
Sat May 21 11:41:59 EDT 2011