batgrbproduct Analysis for Trigger=341076

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Fri Jun  3 13:09:09 EDT 2011
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger341076/SDC
======================================================================

  Trigger: 00341076      Segment: 000

  BAT Trigger Time: 254577560   [s; MET]
      Trigger Stop: 254577880   [s; MET]
               UTC: 2009-01-25T11:59:15.555260    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 170.243681083418   Dec: -61.8833071490815  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    8.05
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    8.05

  Flight Position:   [ source = BAT ]
    RA: 170.243681083418   Dec: -61.8833071490815  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 170.209095111983   Dec: -61.875740334234  [deg; J2000]  
        { 11h 20m 50.2s , -61d 52' 32.7" }
         +/- 2.83675241738381 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.61177440757768 [arcmin] (formal 1-sigma fit error)
    SNR: 6.85852328877418
 
  Angular difference between Flight and Ground position is 1.078314 arcmin
 
  Partial Coding Fraction: 0.671875    [ including projection effects ]

  Duration
     T90: 320 +/- 
        Measured from: 0
                   to: 320     [s; relative to TRIGTIME]
     T50: 320 +/- 
        Measured from: 0
                   to: 320     [s; relative to TRIGTIME]

    WARNING: battblocks failed.  Used TDRSS fore/background intervals

  Fluence
     Peak Flux  (peak 320 second)
        Measured from: 0     
                   to: 320     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0     
                   to: 320     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.866179   0.857341   0.112075  -0.079188
           0.118713   0.115280   0.099845   0.086776 [error]
 Peak      0.866179   0.857341   0.112075  -0.079188
           0.118713   0.115280   0.099845   0.086776 [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 3.22e-07 3.11e-07 2.10e-07 2.22e-07 9.33e-07 1.06e-06   erg/cm2
              Error 5.93e-08 5.81e-08 7.41e-08 1.43e-07 1.86e-07 2.66e-07   erg/cm2
Peak flux Power-law 3.32e-02 1.79e-02 6.04e-03 2.64e-03 5.86e-02 5.98e-02   ph/cm2/s
              Error 6.22e-03 3.24e-03 2.07e-03 1.59e-03 9.39e-03 9.67e-03   ph/cm2/s
 
Fluence   Cutoff-PL 3.09e-07 3.97e-07 7.13e-08 5.87e-10 7.78e-07 7.78e-07   erg/cm2
              Error 6.71e-08 8.32e-08 9.19e-08 1.15e-08 1.58e-07 1.58e-07   erg/cm2
Peak flux Cutoff-PL 3.09e-02 2.33e-02 2.34e-03 1.05e-05 5.65e-02 5.65e-02   ph/cm2/s
              Error 7.03e-03 4.64e-03 2.80e-03 1.87e-04 9.23e-03 9.23e-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    2.567    0.322    -      -           2.86e-04 7.60e-05   63.290 57
CPL  -1.679    3.619      26.5    6.4      2.30e-01 0.00e+00   53.250 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    2.567    0.322    -      -           2.86e-04 7.60e-05   63.290 57
CPL  -1.679    3.619      26.5    6.4      2.30e-01 0.00e+00   53.250 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  320.000    0.000  320.000
T90   320.000    0.000  320.000
T50   320.000    0.000  320.000
Peak  320.000    0.000  320.000

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  170.2091 -61.8757 0.0281   37.1 -167.9       1.7268     6.9  TRIG_00341076       
------------------------------------------
 
Foreground time interval of the image:
  0.000 320.000 (delta_t = 320.000 [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  320.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.56709     ( -0.302874   0.341436 )
Norm@50keV  : 2.86106E-04    ( -7.53193e-05   7.66029e-05 )
------------------------------------------------------------
# Chi-Squared =          63.29 using 59 PHA bins.
# Reduced chi-squared =          1.110 for     57 degrees of freedom 
# Null hypothesis probability =   2.640857e-01
 
Photon flux (15-150 keV)    in 320 sec: 5.85947E-02 ( -0.0093828  0.00938869 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.32739e-07 ( -1.81068e-07  1.90393e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to  320.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.67897     ( -5.31456   1.92315 )
Epeak [keV] : 26.5426      ( -7.9746 4.92461 )
Norm@50keV  : 0.229845    (     )
------------------------------------------------------------
# Chi-Squared =          53.25 using 59 PHA bins.
# Reduced chi-squared =         0.9509 for     56 degrees of freedom 
# Null hypothesis probability =   5.795082e-01
 
Photon flux (15-150 keV)    in 320 sec: 5.65230E-02 ( -0.0092452  0.0092179 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.78422e-07 ( -1.48675e-07  1.66813e-07 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to  320.000 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 3.37870   ( -3.65493   -2.82381 )
beta        : -4.21791    ( 4.20982   1.20347 )
Epeak [keV] : 26.1129      ( -3.71765 3.44166 )
Norm@50keV   : 4.24141    ( -3.08829   23.8394 )
------------------------------------------------------------
# Chi-Squared =          52.35 using 59 PHA bins.
# Reduced chi-squared =         0.9518 for     55 degrees of freedom 
# Null hypothesis probability =   5.766048e-01
 
Photon flux (15-150 keV)    in 320 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    0.000 sec. to  320.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.56709     ( -0.302874   0.341436 )
Norm@50keV  : 2.86106E-04    ( -7.53193e-05   7.66029e-05 )
------------------------------------------------------------
# Chi-Squared =          63.29 using 59 PHA bins.
# Reduced chi-squared =          1.110 for     57 degrees of freedom 
# Null hypothesis probability =   2.640857e-01
 
Photon flux (15-150 keV)    in 320 sec: 5.85947E-02 ( -0.0093828  0.00938869 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.32739e-07 ( -1.81068e-07  1.90393e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to  320.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.67897     ( -5.31456   1.92315 )
Epeak [keV] : 26.5426      ( -7.9746 4.92461 )
Norm@50keV  : 0.229845    (     )
------------------------------------------------------------
# Chi-Squared =          53.25 using 59 PHA bins.
# Reduced chi-squared =         0.9509 for     56 degrees of freedom 
# Null hypothesis probability =   5.795082e-01
 
Photon flux (15-150 keV)    in 320 sec: 5.65230E-02 ( -0.0092452  0.0092179 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.78422e-07 ( -1.48675e-07  1.66813e-07 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to  320.000 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 3.37870   ( -3.65493   -2.82381 )
beta        : -4.21791    ( 4.20982   1.20347 )
Epeak [keV] : 26.1129      ( -3.71765 3.44166 )
Norm@50keV   : 4.24141    ( -3.08829   23.5041 )
------------------------------------------------------------
# Chi-Squared =          52.35 using 59 PHA bins.
# Reduced chi-squared =         0.9518 for     55 degrees of freedom 
# Null hypothesis probability =   5.766048e-01
 
Photon flux (15-150 keV)    in 320 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:
Fri Jun  3 13:29:39 EDT 2011