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
  • Click here for the BAT GCN circular template

    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
    Blue+Cyan dotted lines: Time interval of the scaled map
    From 0.000000 to 320.000000
    

    8 ms binning

    From T100_start-3 s to T100_start+3 s
    Blue+Cyan dotted lines: Time interval of the scaled map
    From 0.000000 to 320.000000
    

    2 ms binning

    From T100_start-1 s to T100_start+1 s
    Blue+Cyan dotted lines: Time interval of the scaled map
    From 0.000000 to 320.000000
    

    SN=5 or 10 sec. binning (whichever binning is satisfied first)

    SN=5 or 10 sec. binning (T < 200 sec)

    Flight mask-tagged light curves

    Caution: Mask-weight map is always using the same on-axis map

    Quad-rate summed light curves (from T0-300 to T0+1000)

    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     
    

    Pre-slew spectrum (Pre-slew PHA with pre-slew DRM)

    Power-law model
     
    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
    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
     
    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   24.4692 )
    ------------------------------------------------------------
    # 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
     
    

    S(25-50 keV) vs. S(50-100 keV) plot

    S(25-50 keV)  = 3.11272e-07
    S(50-100 keV) = 2.09991e-07
    

    T90 vs. Hardness ratio plot

    T90                                   = 320 sec.
    Hardness ratio (energy fluence ratio) = 0.674622
    

    Color vs. Color plot

    Count Ratio  (25-50 keV) / (15-25 keV) = 0.989797
    Count Ratio (50-100 keV) / (15-25 keV) = 0.12939
    

    Mask shadow pattern

    IMX = -7.383386992182867E-01, IMY = 1.583895782330415E-01
    

    TIME vs. PHA plot around the trigger time

    Blue+Cyan dotted lines: Time interval of the scaled map
    From 0.000000 to 320.000000
    

    TIME vs. DetID plot around the trigger time

    Blue+Cyan dotted lines: Time interval of the scaled map
    From 0.000000 to 320.000000
    

    100 us light curve (15-350 keV)

    Blue+Cyan dotted lines: Time interval of the scaled map
    From 0.000000 to 320.000000
    

    Spacecraft aspect plot

    Bright source in the pre-burst/pre-slew/post-slew images

    Pre-burst image of 15-350 keV band

    Time interval of the image:
     
    

    Pre-slew background subtracted image of 15-350 keV band

    Time interval of the image:
    0.000000 320.000000
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
    135.5470 -40.4900    5.4  31.7  138.7   0.6806   2.1    4.0	Vela X-1                      
    170.3581 -60.5663    7.9  37.8 -169.7  -0.3996  -1.5    3.6	Cen X-3                       
    186.6770 -62.7807    0.8  43.0 -160.3   5.6136  14.9    0.8	GX 301-2                      
    116.5853 -34.9033    2.1  27.2  107.1   1.7005   5.4 ------	UNKNOWN                       
    170.2091 -61.8758    1.7  37.1 -167.9   1.7260   6.8 ------	UNKNOWN                       
    

    Post-slew image of 15-350 keV band

    Time interval of the image:
    393.500600 963.060000
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
    135.3496 -40.5444    7.7  29.9   69.0  -0.8072  -1.5    8.2	Vela X-1                      
    170.5569 -60.5363    6.0   1.4  136.5   0.6509   1.9    8.8	Cen X-3                       
    186.6461 -62.7726    0.2   7.7 -126.4  15.8753  49.5    0.3	GX 301-2                      
    133.2831 -59.9714    2.7  17.8   29.3   1.3399   4.2 ------	UNKNOWN                       
    170.2843 -61.9021    1.5   0.0 -117.0   2.6206   7.9 ------	UNKNOWN                       
     84.6440 -65.7170    2.6  35.0   -4.7   1.8493   4.4 ------	UNKNOWN                       
    343.5180 -70.9664    3.3  47.1  -53.3   6.5996   3.5 ------	UNKNOWN                       
    
    Plot creation:
    Fri Jun  3 13:29:39 EDT 2011