batgrbproduct Analysis for Trigger=338338

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Sun Jan 19 19:33:32 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger338338
======================================================================

  Trigger: 00338338      Segment: 000

  BAT Trigger Time: 252119864.128   [s; MET]
      Trigger Stop: 252119865.152   [s; MET]
               UTC: 2008-12-28T01:17:40.758740    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 39.4673999801958   Dec: 30.842582797203  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.61
     Image Trigger?:     NO
     Rate S/N Ratio:     10.6770782520313  [ if not an image trigger ]
     Image S/N Ratio:    7.61

  Flight Position:   [ source = BAT ]
    RA: 39.4673999801958   Dec: 30.842582797203  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 39.4759056331836   Dec: 30.8348263027381  [deg; J2000]  
        { 02h 37m 54.2s , +30d 50' 05.4" }
         +/- 2.30200780377269 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.0858514668772 [arcmin] (formal 1-sigma fit error)
    SNR: 9.24321305285686
 
  Angular difference between Flight and Ground position is 0.639213 arcmin
 
  Partial Coding Fraction: 0.859375    [ including projection effects ]

  Duration
     T90: 3 +/- 1.4142135623731
        Measured from: -0.127999991178513
                   to: 2.87200000882149     [s; relative to TRIGTIME]
     T50: 2 +/- 1
        Measured from: -0.127999991178513
                   to: 1.87200000882149     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.127999991178513     
                   to: 0.872000008821487     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.127999991178513     
                   to: 2.87200000882149     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.064128   0.085566   0.022239   0.001518
           0.009476   0.010039   0.008531   0.007280 [error]
 Peak      0.024167   0.036959   0.011511  -0.001401
           0.005495   0.005914   0.005126   0.004201 [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 2.06e-08 2.79e-08 2.79e-08 5.05e-08 9.27e-08 1.27e-07   erg/cm2
              Error 4.33e-09 4.50e-09 7.92e-09 2.80e-08 1.84e-08 3.72e-08   erg/cm2
Peak flux Power-law 2.51e-01 2.09e-01 1.19e-01 1.00e-01 6.23e-01 6.79e-01   ph/cm2/s
              Error 7.70e-02 4.59e-02 4.02e-02 6.44e-02 1.37e-01 1.53e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.97e-08 3.14e-08 2.43e-08 8.62e-09 8.18e-08 8.42e-08   erg/cm2
              Error 4.78e-09 7.53e-09 1.19e-08 3.82e-08 1.67e-08 4.87e-08   erg/cm2
Peak flux Cutoff-PL 2.05e-01 2.73e-01 9.57e-02 5.17e-03 5.79e-01 5.79e-01   ph/cm2/s
              Error 9.37e-02 7.92e-02 7.72e-02 3.04e-02 1.40e-01 1.42e-01   ph/cm2/s
 
Fluence        Band 1.91e-08 3.24e-08 2.38e-08 2.46e-08 8.55e-08 9.97e-08   erg/cm2
              Error 4.88e-09 -------- -------- -------- -------- --------   erg/cm2
Peak flux      Band -------- -------- -------- -------- -------- --------   ph/cm2/s
              Error -------- -------- -------- -------- -------- --------   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.999    0.296    -      -           3.35e-03 6.98e-04   56.290 57
CPL   1.012    1.895      37.4    0.0      1.37e-02 0.00e+00   55.420 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.816    0.382    -      -           4.49e-03 1.18e-03   54.070 57
CPL  -0.509    3.704      41.9  106.4      1.11e-01 6.88e+01   51.250 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    3.000   -0.128    2.872
T90     3.000   -0.128    2.872
T50     2.000   -0.128    1.872
Peak    1.000   -0.128    0.872
  • Click here for the BAT GCN circular template
  • Special notes of this burst

    Image

    Pre-slew 15.0-350.0 keV image (Event data)

    #   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
       39.4759    30.8348   0.0208    25.9023     4.7075         0.1629767      9.243 TRIG_00338338                 
     
    Foreground time interval of the image:
     -0.128   2.872 (delta_t =   3.000 [sec])
    Background time interval of the image:
    -266.827  -0.128 (delta_t = 266.699 [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
    Blue+Cyan dotted lines: Time interval of the scaled map
    From 0.000000 to 1.024000
    

    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 1.024000
    

    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 1.024000
    

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

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

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

    Spectral Evolution

    Spectra

    Notes:

    Time averaged spectrum fit using the average DRM

    Power-law model
    Time interval is from   -0.128 sec. to    2.872 sec.
     
    Spectral model in power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 1.99891     ( -0.283642   0.309248 )
    Norm@50keV  : 3.35209E-03    ( -0.000709289   0.0006864 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          56.29 using 59 PHA bins.
    # Reduced chi-squared =         0.9875 for     57 degrees of freedom 
    # Null hypothesis probability =   5.018691e-01
     
    Photon flux (15-150 keV)    in 3 sec: 0.502562 ( -0.0789864  0.078987 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 9.27354e-08 ( -1.80191e-08  1.87e-08 ) ergs/cm2
     
    
    Cutoff power-law model
    Time interval is from   -0.128 sec. to    2.872 sec.
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 1.01158     ( -2.66291   1.12754 )
    Epeak [keV] : 37.4211      (   )
    Norm@50keV  : 1.37421E-02    (     )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          55.42 using 59 PHA bins.
    # Reduced chi-squared =         0.9897 for     56 degrees of freedom 
    # Null hypothesis probability =   4.966093e-01
     
    Photon flux (15-150 keV)    in 3 sec: 0.486694 ( -0.083213  0.042924 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 8.17965e-08 ( -2.02722e-08  1.31781e-08 ) ergs/cm2
     
    
    Band function
    Time interval is from   -0.128 sec. to    2.872 sec.
     
    Spectral model in the Band function:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    alpha       : -0.375390   ( 0.346994   0.346994 )
    beta        : -2.55463    ( 2.55973   0.695919 )
    Epeak [keV] : 34.1432      ( -33.995 19.5949 )
    Norm@50keV   : 3.74545E-02    ( -0.0438478   213.115 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          54.15 using 59 PHA bins.
    # Reduced chi-squared =         0.9846 for     55 degrees of freedom 
    # Null hypothesis probability =   5.069449e-01
     
    Photon flux (15-150 keV)    in 3 sec:  (    ) ph/cm2/s
    Energy fluence (15-150 keV)             : 8.55228e-08 ( 0  0 ) ergs/cm2
     
    
    Single BB
     
    Spectral model blackbody:
    ------------------------------------------------------------
    Parameters  : value    Lower 90%  Upper 90%
    kT [keV]    : 8.97943  (-1.35022  1.60935)
    R^2/D10^2   : 0.365430  (-0.173758   0.320899)
    (R is the radius in km and D10 is the distance to the source in units of 10 kpc)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          58.07 using 59 PHA bins.
    # Reduced chi-squared =          1.019 for     57 degrees of freedom 
    # Null hypothesis probability =   4.357442e-01
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  1.719e-08   4.987e-09
    25- 50  3.641e-08   8.476e-09
    50-150  1.379e-08   6.002e-09
    15-150  6.739e-08   1.718e-08
    
    Thermal bremsstrahlung (OTTB)
     
     
    Spectral model: thermal bremsstrahlung
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT [keV]    : 59.3977       (-22.1435      47.8607)
    Norm        : 2.66447       (-0.631212     0.84043)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          55.46 using 59 PHA bins.
    # Reduced chi-squared =         0.9729 for     57 degrees of freedom 
    # Null hypothesis probability =   5.331510e-01
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  2.006e-08   3.972e-09
    25- 50  3.043e-08   7.488e-09
    50-150  3.433e-08   1.592e-08
    15-150  8.482e-08   2.075e-08
    
    Double BB
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT1 [keV]   : 8.14364        (-1.67487      1.41497)
    R1^2/D10^2  : 0.500791        (-0.181916      0.425995)
    kT2 [keV]   : 195.694        (      )
    R2^2/D10^2  : 4.19599E-05    (-2.57968e-05   0.005289)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          52.04 using 59 PHA bins.
    #Fit statistic : Chi-Squared =          51.80 using 59 PHA bins.
    # Reduced chi-squared =         0.9462 for     55 degrees of freedom 
    # Reduced chi-squared =         0.9417 for     55 degrees of freedom 
    # Null hypothesis probability =   5.883758e-01
    # Null hypothesis probability =   5.978450e-01
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  1.846e-08   6.819e-09
    25- 50  3.413e-08   1.231e-08
    50-150  4.259e-08   2.652e-08
    15-150  9.519e-08   3.661e-08
    

    Peak spectrum fit

    Power-law model
    Time interval is from   -0.128 sec. to    0.872 sec.
     
    Spectral model in power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 1.81610     ( -0.365052   0.399346 )
    Norm@50keV  : 4.49016E-03    ( -0.00119946   0.0011587 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          54.07 using 59 PHA bins.
    # Reduced chi-squared =         0.9485 for     57 degrees of freedom 
    # Null hypothesis probability =   5.858775e-01
     
    Photon flux (15-150 keV)    in 1 sec: 0.622638 ( -0.136608  0.136611 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 4.13163e-08 ( -1.07912e-08  1.12659e-08 ) ergs/cm2
     
    
    Cutoff power-law model
    Time interval is from   -0.128 sec. to    0.872 sec.
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: -0.509188     ( -4.95001   2.45749 )
    Epeak [keV] : 41.9020      ( -8.97183 203.879 )
    Norm@50keV  : 0.111464    ( -0.162209   137.373 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          51.25 using 59 PHA bins.
    # Reduced chi-squared =         0.9151 for     56 degrees of freedom 
    # Null hypothesis probability =   6.550533e-01
     
    Photon flux (15-150 keV)    in 1 sec: 0.578758 ( -0.138713  0.141933 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 3.26911e-08 ( -9.0363e-09  1.32821e-08 ) ergs/cm2
     
    
    Band function
    Time interval is from   -0.128 sec. to    0.872 sec.
     
    Spectral model in the Band function:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    alpha       : 1.31931   ( -2.8913   -1.36121 )
    beta        : -2.83737    ( 2.84391   1.0275 )
    Epeak [keV] : 38.3111      ( -12.065 13.5843 )
    Norm@50keV   : 0.393040    ( -0.491542   53.1021 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          50.55 using 59 PHA bins.
    # Reduced chi-squared =         0.9192 for     55 degrees of freedom 
    # Null hypothesis probability =   6.450178e-01
     
    Photon flux (15-150 keV)    in 1 sec:  (    ) ph/cm2/s
    Energy fluence (15-150 keV)             : 3.62836e-08 ( 0  0 ) ergs/cm2
     
    
    Single BB
     
    Spectral model blackbody:
    ------------------------------------------------------------
    Parameters  : value    Lower 90%  Upper 90%
    kT [keV]    : 10.3117  (-1.92198  2.47271)
    R^2/D10^2   : 0.281468  (-0.158019   0.328165)
    (R is the radius in km and D10 is the distance to the source in units of 10 kpc)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          51.34 using 59 PHA bins.
    # Reduced chi-squared =         0.9007 for     57 degrees of freedom 
    # Null hypothesis probability =   6.864017e-01
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  6.155e-09   2.535e-09
    25- 50  1.597e-08   6.027e-09
    50-150  9.104e-09   5.019e-09
    15-150  3.123e-08   1.155e-08
    
    Thermal bremsstrahlung (OTTB)
     
     
    Spectral model: thermal bremsstrahlung
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT [keV]    : 81.6754       (-39.5049      -81.6754)
    Norm        : 2.95327       (-0.750367     1.13135)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          52.80 using 59 PHA bins.
    # Reduced chi-squared =         0.9264 for     57 degrees of freedom 
    # Null hypothesis probability =   6.331558e-01
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  7.673e-09   2.766e-09
    25- 50  1.269e-08   6.401e-09
    50-150  1.817e-08   1.453e-08
    15-150  3.854e-08   1.904e-08
    
    Double BB
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT1 [keV]   : 9.63122        (      )
    R1^2/D10^2  : 0.343974        (-0.1901      4.04979)
    kT2 [keV]   : 199.363        (-199.363      -199.363)
    R2^2/D10^2  : 2.98581E-05    (-3.7282e-05   0.453044)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          50.39 using 59 PHA bins.
    #Fit statistic : Chi-Squared =          49.76 using 59 PHA bins.
    # Reduced chi-squared =         0.9162 for     55 degrees of freedom 
    # Reduced chi-squared =         0.9047 for     55 degrees of freedom 
    # Null hypothesis probability =   6.510261e-01
    # Null hypothesis probability =   6.744318e-01
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  6.358e-09   2.905e-09
    25- 50  1.545e-08   8.462e-09
    50-150  9.769e-09   6.275e-09
    15-150  3.158e-08   1.649e-08
    

    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: 1.99891     ( -0.283642   0.309248 )
    Norm@50keV  : 3.35209E-03    ( -0.000709289   0.0006864 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          56.29 using 59 PHA bins.
    # Reduced chi-squared =         0.9875 for     57 degrees of freedom 
    # Null hypothesis probability =   5.018691e-01
     
    Photon flux (15-150 keV)    in 3 sec: 0.502562 ( -0.0789864  0.078987 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 9.27354e-08 ( -1.80191e-08  1.87e-08 ) ergs/cm2
     
    
    Cutoff power-law model
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 1.01158     ( -2.66291   1.11875 )
    Epeak [keV] : 37.4211      (   )
    Norm@50keV  : 1.37421E-02    (     )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          55.42 using 59 PHA bins.
    # Reduced chi-squared =         0.9897 for     56 degrees of freedom 
    # Null hypothesis probability =   4.966093e-01
     
    Photon flux (15-150 keV)    in 3 sec: 0.486694 ( -0.083213  0.042924 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 8.17965e-08 ( -2.02722e-08  1.31781e-08 ) ergs/cm2
     
    
    Band function
     
    Spectral model in the Band function:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    alpha       : -0.375390   ( 0.346994   0.346994 )
    beta        : -2.55463    ( 2.55973   0.695919 )
    Epeak [keV] : 34.1432      ( -33.995 19.5949 )
    Norm@50keV   : 3.74545E-02    ( -0.0438478   213.132 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          54.15 using 59 PHA bins.
    # Reduced chi-squared =         0.9846 for     55 degrees of freedom 
    # Null hypothesis probability =   5.069449e-01
     
    Photon flux (15-150 keV)    in 3 sec:  (    ) ph/cm2/s
    Energy fluence (15-150 keV)             : 8.55228e-08 ( 0  0 ) ergs/cm2
     
    

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

    S(25-50 keV)  = 2.79e-08
    S(50-100 keV) = 2.79e-08
    

    T90 vs. Hardness ratio plot

    T90                                   = 3 sec.
    Hardness ratio (energy fluence ratio) = 1
    

    Color vs. Color plot

    Count Ratio  (25-50 keV) / (15-25 keV) = 1.3343
    Count Ratio (50-100 keV) / (15-25 keV) = 0.346791
    

    Mask shadow pattern

    IMX = 4.839855197255994E-01, IMY = -3.985472905366623E-02
    

    TIME vs. PHA plot around the trigger time

    Blue+Cyan dotted lines: Time interval of the scaled map
    From 0.000000 to 1.024000
    

    TIME vs. DetID plot around the trigger time

    Blue+Cyan dotted lines: Time interval of the scaled map
    From 0.000000 to 1.024000
    

    100 us light curve (15-350 keV)

    Blue+Cyan dotted lines: Time interval of the scaled map
    From 0.000000 to 1.024000
    

    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:
    -266.827400 -0.128000
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
     83.6482  21.9887    0.8  39.4   80.5  10.6897  14.4    1.8	Crab                          
     58.5796 -17.1100    2.2  25.8  171.1   1.0297   5.2 ------	UNKNOWN                       
     23.5281  54.1909    2.1  51.8    1.7   2.9489   5.6 ------	UNKNOWN                       
     16.5506   0.6626    2.8  30.3  -80.1   1.1146   4.0 ------	UNKNOWN                       
    

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

    Time interval of the image:
    -0.128000 2.872000
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
     83.6424  22.0237  164.7  39.4   80.5   0.0049   0.1    0.8	Crab                          
     76.8603  -1.7759    2.5  31.3  121.6   0.1338   4.6 ------	UNKNOWN                       
     39.4759  30.8349    1.2  25.9    4.7   0.1630   9.2 ------	UNKNOWN                       
     42.8218 -29.8312    2.4  35.8 -156.0   0.1007   4.9 ------	UNKNOWN                       
    

    Post-slew image of 15-350 keV band

    Time interval of the image:
    61.972590 119.572590
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
     53.5882 -19.3789    2.1  52.0  169.7   1.4407   5.5 ------	UNKNOWN                       
    343.6584  63.4051    2.4  47.6  -23.4   0.6928   4.8 ------	UNKNOWN                       
     10.8435  -7.4790    3.2  47.1 -132.9   0.9329   3.6 ------	UNKNOWN                       
    
    Plot creation:
    Sun May 31 05:12:13 EDT 2015