batgrbproduct Analysis for Trigger=431711

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Sun Aug 15 20:19:36 EDT 2010
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger431711/GCN5_download_cron
======================================================================

  Trigger: 00431711      Segment: 000

  BAT Trigger Time: 303555800   [s; MET]
      Trigger Stop: 303555928   [s; MET]
               UTC: 2010-08-15T09:03:13.917620    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 195.319846638631   Dec: -61.6089890129573  [deg; J2000]

     Catalogged Source?: YES
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    26.47
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    26.47

  Flight Position:   [ source = BAT ]
    RA: 195.319846638631   Dec: -61.6089890129573  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 195.320555931859   Dec: -61.6016737989408  [deg; J2000]  
        { 13h 01m 16.9s , -61d 36' 06.0" }
         +/- 0.564007949418867 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.147983894822234 [arcmin] (formal 1-sigma fit error)
    SNR: 68.9326859661787
 
  Angular difference between Flight and Ground position is 0.439379 arcmin
 
  Partial Coding Fraction: 0.9453125    [ including projection effects ]

  Duration
     T90: 382.907999932766 +/- 15.3042304908827
        Measured from: -125.767999887466
                   to: 257.1400000453     [s; relative to TRIGTIME]
     T50: 140.05999994278 +/- 9.09977511623863
        Measured from: -20.4039998650551
                   to: 119.656000077724     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 50.4319999814034     
                   to: 51.4319999814034     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -149.283999979496     
                   to: 284.864000022411     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total    14.977448  10.708568   0.538967   0.162552
           0.139609   0.138231   0.124469   0.134281 [error]
 Peak      0.083375   0.070061   0.004604  -0.004536
           0.006840   0.006467   0.005507   0.005847 [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 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 Power-law 8.72e-01 4.51e-01 1.45e-01 5.94e-02 1.50e+00 1.53e+00   ph/cm2/s
              Error 9.65e-02 5.53e-02 3.51e-02 2.49e-02 1.51e-01 1.57e-01   ph/cm2/s
 
Fluence   Cutoff-PL 4.57e-06 4.55e-06 4.34e-07 8.64e-10 9.55e-06 9.55e-06   erg/cm2
              Error 3.46e-07 1.37e-07 7.61e-08 7.96e-10 3.95e-07 3.95e-07   erg/cm2
Peak flux Cutoff-PL 8.51e-01 5.47e-01 9.41e-02 2.98e-03 1.50e+00 1.50e+00   ph/cm2/s
              Error 1.05e-01 7.62e-02 4.14e-02 1.46e-01 0.00e+00 0.00e+00   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    3.436    0.000    -      -           1.83e-03 0.00e+00  324.150 57
CPL   1.000    0.000      50.0    0.0      6.58e-03 0.00e+00 1556.840 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    2.642    0.217    -      -           6.99e-03 1.32e-03   66.210 57
CPL   0.637    1.166      21.9    8.5      1.58e-01 5.92e-01   54.550 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  434.148 -149.284  284.864
T90   382.908 -125.768  257.140
T50   140.060  -20.404  119.656
Peak    1.000   50.432   51.432

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  195.3206 -61.6017 0.0028   22.3 -177.2      23.5481    68.9  TRIG_00431711       
------------------------------------------
 
Foreground time interval of the image:
-70.699 284.864 (delta_t = 355.563 [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 -149.284 sec. to  284.864 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 3.43610     (     )
Norm@50keV  : 1.83378E-03    (     )
------------------------------------------------------------
# Chi-Squared =         324.15 using 59 PHA bins.
# Reduced chi-squared =         5.6868 for     57 degrees of freedom 
# Null hypothesis probability =   5.020669e-39
 
Photon flux (15-150 keV)    in 434.1 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 
Cutoff power-law model
Time interval is from -149.284 sec. to  284.864 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.00000     (     )
Epeak [keV] : 50.0000      (   )
Norm@50keV  : 6.58072E-03    (     )
------------------------------------------------------------
# Chi-Squared =        1556.84 using 59 PHA bins.
# Reduced chi-squared =        27.8007 for     56 degrees of freedom 
# Null hypothesis probability =  9.502046e-289
 
Photon flux (15-150 keV)    in 434.1 sec: 0.550348 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.54951e-06 ( -3.93208e-07  3.97245e-07 ) ergs/cm2
 
Band function
Time interval is from -149.284 sec. to  284.864 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.42884   (     )
beta        : -8.94612    (     )
Epeak [keV] : 11.3764      (   )
Norm@50keV   : 2.47633E-02    (     )
------------------------------------------------------------
# Chi-Squared =         181.88 using 59 PHA bins.
# Reduced chi-squared =         3.3069 for     55 degrees of freedom 
# Null hypothesis probability =   1.737637e-15
 
Photon flux (15-150 keV)    in 434.1 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     

Peak spectrum fit

Power-law model
Time interval is from   50.432 sec. to   51.432 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.64232     ( -0.20694   0.227472 )
Norm@50keV  : 6.98676E-03    ( -0.00130744   0.00132913 )
------------------------------------------------------------
# Chi-Squared =          66.21 using 59 PHA bins.
# Reduced chi-squared =          1.162 for     57 degrees of freedom 
# Null hypothesis probability =   1.888790e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.50146 ( -0.15093  0.151157 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.28918e-08 ( -9.55091e-09  9.96156e-09 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   50.432 sec. to   51.432 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.636772     ( -1.26593   1.06671 )
Epeak [keV] : 21.9327      ( -12.0296 5.00962 )
Norm@50keV  : 0.157582    ( -0.157582   1.02586 )
------------------------------------------------------------
# Chi-Squared =          54.55 using 59 PHA bins.
# Reduced chi-squared =         0.9741 for     56 degrees of freedom 
# Null hypothesis probability =   5.298810e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.49500 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.56075e-08 ( -7.8215e-09  8.4772e-09 ) ergs/cm2
 
Band function
Time interval is from   50.432 sec. to   51.432 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.857376   ( -0.865053   1.49338 )
beta        : -9.37167    ( 10   20 )
Epeak [keV] : 20.5255      ( -11.0783 6.4932 )
Norm@50keV   : 0.113499    ( -0.113458   1.10524 )
------------------------------------------------------------
# Chi-Squared =          54.66 using 59 PHA bins.
# Reduced chi-squared =         0.9938 for     55 degrees of freedom 
# Null hypothesis probability =   4.875510e-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:
Sun Aug 15 20:35:31 EDT 2010