batgrbproduct Analysis for Trigger=164279

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Wed Jan 22 19:30:49 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger164279
======================================================================

  Trigger: 00164279      Segment: 000

  BAT Trigger Time: 153926574.272   [s; MET]
      Trigger Stop: 153926579.776   [s; MET]
               UTC: 2005-11-17T13:22:54.427080    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 85.2253223997025   Dec: -19.2449527944692  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    6.47
     Image Trigger?:     NO
     Rate S/N Ratio:     12.8452325786651  [ if not an image trigger ]
     Image S/N Ratio:    6.47

  Flight Position:   [ source = BAT ]
    RA: 85.2253223997025   Dec: -19.2449527944692  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 85.2100145209269   Dec: -19.2840579216085  [deg; J2000]  
        { 05h 40m 50.4s , -19d 17' 02.6" }
         +/- 2.46505516627168 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.22983849847636 [arcmin] (formal 1-sigma fit error)
    SNR: 8.38235467757771
 
  Angular difference between Flight and Ground position is 2.501384 arcmin
 
  Partial Coding Fraction: 0.71875    [ including projection effects ]

  Duration
     T90: 9.02000001072884 +/- 1.31508175906147
        Measured from: 1.51599997282028
                   to: 10.5359999835491     [s; relative to TRIGTIME]
     T50: 4.83599999547005 +/- 2.50364615854103
        Measured from: 2.64399999380112
                   to: 7.47999998927116     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 1.43999999761581     
                   to: 2.43999999761581     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 1.38799998164177     
                   to: 10.9959999918938     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.070222   0.110627   0.095085   0.015652
           0.017332   0.018047   0.016099   0.013849 [error]
 Peak      0.016709   0.020447   0.020709   0.004442
           0.005675   0.005964   0.005400   0.004660 [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 2.47e-08 4.41e-08 6.06e-08 1.72e-07 1.75e-07 3.02e-07   erg/cm2
              Error 6.97e-09 8.17e-09 1.51e-08 8.86e-08 3.67e-08 1.02e-07   erg/cm2
Peak flux Power-law 1.67e-01 1.67e-01 1.17e-01 1.31e-01 5.03e-01 5.82e-01   ph/cm2/s
              Error 7.14e-02 4.80e-02 4.14e-02 9.03e-02 1.40e-01 1.66e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.12e-08 4.93e-08 6.39e-08 4.90e-08 1.64e-07 1.83e-07   erg/cm2
              Error 8.13e-09 1.04e-08 1.76e-08 1.01e-07 3.80e-08 1.07e-07   erg/cm2
Peak flux Cutoff-PL 8.78e-02 1.99e-01 1.44e-01 2.03e-02 4.49e-01 4.52e-01   ph/cm2/s
              Error 9.55e-02 7.94e-02 5.59e-02 5.04e-02 1.85e-01 1.80e-01   ph/cm2/s
 
Fluence        Band 2.23e-08 4.68e-08 6.48e-08 9.10e-08 1.74e-07 1.88e-07   erg/cm2
              Error -------- -------- -------- -------- 4.14e-08 --------   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    1.544    0.303    -      -           1.93e-03 3.71e-04   79.510 57
CPL   0.534    1.293      70.8  -24.7      6.42e-03 1.74e-02   77.150 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.508    0.444    -      -           4.02e-03 1.16e-03   87.710 57
CPL  -1.339    0.583      59.9   38.4      9.51e-02 4.93e+02   83.700 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    9.608    1.388   10.996
T90     9.020    1.516   10.536
T50     4.836    2.644    7.480
Peak    1.000    1.440    2.440
  • 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
       85.2100   -19.2841   0.0230    29.6625   166.3031         0.2972575      8.382 TRIG_00164279                 
     
    Foreground time interval of the image:
      1.388  10.996 (delta_t =   9.608 [sec])
    Background time interval of the image:
    -141.371   1.388 (delta_t = 142.759 [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 5.504000
    

    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 5.504000
    

    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 5.504000
    

    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    1.388 sec. to   10.996 sec.
     
    Spectral model in power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 1.54418     ( -0.298578   0.308104 )
    Norm@50keV  : 1.93043E-03    ( -0.000373888   0.000368562 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          79.51 using 59 PHA bins.
    # Reduced chi-squared =          1.395 for     57 degrees of freedom 
    # Null hypothesis probability =   2.609332e-02
     
    Photon flux (15-150 keV)    in 9.608 sec: 0.243971 ( -0.0446218  0.0446717 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 1.74755e-07 ( -3.62261e-08  3.70878e-08 ) ergs/cm2
     
    
    Cutoff power-law model
    Time interval is from    1.388 sec. to   10.996 sec.
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 0.533521     ( -1.47654   1.10881 )
    Epeak [keV] : 70.7541      ( -21.4078 -70.8532 )
    Norm@50keV  : 6.41701E-03    ( -0.00639309   0.028483 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          77.15 using 59 PHA bins.
    # Reduced chi-squared =          1.378 for     56 degrees of freedom 
    # Null hypothesis probability =   3.201021e-02
     
    Photon flux (15-150 keV)    in 9.608 sec: 0.235591 ( -0.045491  0.045562 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 1.63589e-07 ( -3.70091e-08  3.89374e-08 ) ergs/cm2
     
    
    Band function
    Time interval is from    1.388 sec. to   10.996 sec.
     
    Spectral model in the Band function:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    alpha       : -0.535772   ( -1.0833   1.52844 )
    beta        : -10.0000    ( 10   7.10543e-15 )
    Epeak [keV] : 70.8322      ( -21.6859 405.856 )
    Norm@50keV   : 6.39872E-03    ( -0.00639863   0.0284294 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          77.15 using 59 PHA bins.
    # Reduced chi-squared =          1.403 for     55 degrees of freedom 
    # Null hypothesis probability =   2.605637e-02
     
    Photon flux (15-150 keV)    in 9.608 sec: 0.238425 ( 6.76157  -0.047264 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 1.74386e-07 ( -1.74319e-07  -5.13567e-08 ) ergs/cm2
     
    
    Single BB
     
    Spectral model blackbody:
    ------------------------------------------------------------
    Parameters  : value    Lower 90%  Upper 90%
    kT [keV]    : 14.8541  (-3.05332  3.78117)
    R^2/D10^2   : 2.93601E-02  (-0.0161043   0.0364259)
    (R is the radius in km and D10 is the distance to the source in units of 10 kpc)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          81.63 using 59 PHA bins.
    # Reduced chi-squared =          1.432 for     57 degrees of freedom 
    # Null hypothesis probability =   1.787821e-02
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  1.305e-08   4.716e-09
    25- 50  5.139e-08   1.555e-08
    50-150  7.683e-08   2.999e-08
    15-150  1.413e-07   4.100e-08
    
    Thermal bremsstrahlung (OTTB)
     
     
    Spectral model: thermal bremsstrahlung
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT [keV]    : 186.196       (-100.917      -184.34)
    Norm        : 1.00535       (-0.184073     0.221152)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          78.23 using 59 PHA bins.
    # Reduced chi-squared =          1.372 for     57 degrees of freedom 
    # Null hypothesis probability =   3.252377e-02
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  2.426e-08   1.400e-08
    25- 50  4.629e-08   2.583e-08
    50-150  9.919e-08   5.616e-08
    15-150  1.697e-07   9.449e-08
    
    Double BB
     
     
    Spectral model: bbodyrad<1> + bbodyrad<2>
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT1 [keV]   : 5.75068        (-2.54141      4.24456)
    R1^2/D10^2  : 0.428448        (-0.365166      3.99406)
    kT2 [keV]   : 20.3074        (-5.4469      11.4095)
    R2^2/D10^2  : 8.12972E-03    (-0.00669756   0.0184231)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          75.74 using 59 PHA bins.
    # Reduced chi-squared =          1.377 for     55 degrees of freedom 
    # Null hypothesis probability =   3.330815e-02
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  2.315e-08   1.338e-08
    25- 50  4.646e-08   2.424e-08
    50-150  9.630e-08   5.938e-08
    15-150  1.659e-07   8.931e-08
    

    Peak spectrum fit

    Power-law model
    Time interval is from    1.440 sec. to    2.440 sec.
     
    Spectral model in power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 1.50821     ( -0.432223   0.455726 )
    Norm@50keV  : 4.02066E-03    ( -0.00117095   0.00115388 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          87.71 using 59 PHA bins.
    # Reduced chi-squared =          1.539 for     57 degrees of freedom 
    # Null hypothesis probability =   5.562921e-03
     
    Photon flux (15-150 keV)    in 1 sec: 0.503044 ( -0.140241  0.140575 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 3.80947e-08 ( -1.1751e-08  1.21421e-08 ) ergs/cm2
     
    
    Cutoff power-law model
    Time interval is from    1.440 sec. to    2.440 sec.
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: -1.33850     ( 1.39187   2.55782 )
    Epeak [keV] : 59.9449      ( -13.4611 63.4237 )
    Norm@50keV  : 9.50769E-02    ( -0.106074   985.823 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          83.70 using 59 PHA bins.
    # Reduced chi-squared =          1.495 for     56 degrees of freedom 
    # Null hypothesis probability =   9.639391e-03
     
    Photon flux (15-150 keV)    in 1 sec: 0.449387 ( -0.218136  0.152634 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 3.35725e-08 ( -1.27431e-08  1.23265e-08 ) ergs/cm2
     
    
    Band function
    Time interval is from    1.440 sec. to    2.440 sec.
     
    Spectral model in the Band function:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    alpha       : 1.19010   ( -1.86662   -0.606145 )
    beta        : -10.0000    ( 10   3.55271e-15 )
    Epeak [keV] : 60.5798      ( -14.1452 63.4375 )
    Norm@50keV   : 8.18889E-02    ( -0.0818942   4.47226 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          83.71 using 59 PHA bins.
    # Reduced chi-squared =          1.522 for     55 degrees of freedom 
    # Null hypothesis probability =   7.565896e-03
     
    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]    : 15.3559  (-3.3554  4.52538)
    R^2/D10^2   : 5.83972E-02  (-0.035401   0.0799596)
    (R is the radius in km and D10 is the distance to the source in units of 10 kpc)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          83.51 using 59 PHA bins.
    # Reduced chi-squared =          1.465 for     57 degrees of freedom 
    # Null hypothesis probability =   1.262797e-02
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  2.871e-09   1.544e-09
    25- 50  1.165e-08   7.005e-09
    50-150  1.889e-08   1.203e-08
    15-150  3.342e-08   1.752e-08
    
    Thermal bremsstrahlung (OTTB)
     
     
    Spectral model: thermal bremsstrahlung
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT [keV]    : 182.460       (-116.671      -183.476)
    Norm        : 2.09976       (-0.578238     0.711683)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          86.71 using 59 PHA bins.
    # Reduced chi-squared =          1.521 for     57 degrees of freedom 
    # Null hypothesis probability =   6.796114e-03
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  5.287e-09   3.142e-09
    25- 50  1.006e-08   5.930e-09
    50-150  2.141e-08   1.287e-08
    15-150  3.676e-08   2.235e-08
    
    Double BB
     
     
    Spectral model: bbodyrad<1> + bbodyrad<2>
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT1 [keV]   : 3.49264        (-3.46434      196.422)
    R1^2/D10^2  : 3.85964        (-4.12639      -4.12639)
    kT2 [keV]   : 16.4586        (-3.88905      4.66891)
    R2^2/D10^2  : 4.34835E-02    (-0.0448781   0.0762369)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          82.74 using 59 PHA bins.
    # Reduced chi-squared =          1.504 for     55 degrees of freedom 
    # Null hypothesis probability =   9.156042e-03
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  4.168e-09   1.983e-09
    25- 50  1.085e-08   6.475e-09
    50-150  1.995e-08   1.272e-08
    15-150  3.496e-08   2.065e-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: 1.54418     ( -0.298578   0.308104 )
    Norm@50keV  : 1.93043E-03    ( -0.000373888   0.000368562 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          79.51 using 59 PHA bins.
    # Reduced chi-squared =          1.395 for     57 degrees of freedom 
    # Null hypothesis probability =   2.609332e-02
     
    Photon flux (15-150 keV)    in 9.608 sec: 0.243971 ( -0.0446218  0.0446717 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 1.74755e-07 ( -3.62261e-08  3.70878e-08 ) ergs/cm2
     
    
    Cutoff power-law model
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 0.533521     ( -1.47654   1.10881 )
    Epeak [keV] : 70.7541      ( -21.4078 -70.8532 )
    Norm@50keV  : 6.41701E-03    ( -0.00639309   0.028483 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          77.15 using 59 PHA bins.
    # Reduced chi-squared =          1.378 for     56 degrees of freedom 
    # Null hypothesis probability =   3.201021e-02
     
    Photon flux (15-150 keV)    in 9.608 sec: 0.235591 ( -0.045491  0.045562 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 1.63589e-07 ( -3.70091e-08  3.89374e-08 ) ergs/cm2
     
    
    Band function
     
    Spectral model in the Band function:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    alpha       : -0.537586   ( -1.04003   1.56211 )
    beta        : -10.0000    ( 10   2.4869e-14 )
    Epeak [keV] : 70.8880      ( -21.7413 409.395 )
    Norm@50keV   : 6.38401E-03    ( -0.00638392   0.0284441 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          77.15 using 59 PHA bins.
    # Reduced chi-squared =          1.403 for     55 degrees of freedom 
    # Null hypothesis probability =   2.605636e-02
     
    Photon flux (15-150 keV)    in 9.608 sec: 0.238425 ( 6.76157  -0.047264 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 1.74386e-07 ( -1.74319e-07  -5.13567e-08 ) ergs/cm2
     
    

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

    S(25-50 keV)  = 4.41e-08
    S(50-100 keV) = 6.06e-08
    

    T90 vs. Hardness ratio plot

    T90                                   = 9.02000001072884 sec.
    Hardness ratio (energy fluence ratio) = 1.37415
    

    Color vs. Color plot

    Count Ratio  (25-50 keV) / (15-25 keV) = 1.57539
    Count Ratio (50-100 keV) / (15-25 keV) = 1.35406
    

    Mask shadow pattern

    IMX = -5.533267425423501E-01, IMY = -1.348543697746188E-01
    

    TIME vs. PHA plot around the trigger time

    Blue+Cyan dotted lines: Time interval of the scaled map
    From 0.000000 to 5.504000
    

    TIME vs. DetID plot around the trigger time

    Blue+Cyan dotted lines: Time interval of the scaled map
    From 0.000000 to 5.504000
    

    100 us light curve (15-350 keV)

    Blue+Cyan dotted lines: Time interval of the scaled map
    From 0.000000 to 5.504000
    

    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:
    -141.371400 1.388000
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
     47.9142 -16.0995    3.1  10.4   48.5   0.4014   3.7 ------	UNKNOWN                       
     95.6872 -36.1230    2.7  37.5 -161.5   0.6706   4.3 ------	UNKNOWN                       
     70.2105 -66.0657    2.1  42.4 -108.9   2.7037   5.6 ------	UNKNOWN                       
    

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

    Time interval of the image:
    1.388000 10.996000
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
     85.2100 -19.2841    1.4  29.7  166.3   0.2973   8.4 ------	UNKNOWN                       
      7.0571 -34.8003    3.1  41.2  -34.1   0.1699   3.8 ------	UNKNOWN                       
     91.5165 -52.8693    2.4  39.7 -134.4   0.2396   4.9 ------	UNKNOWN                       
    

    Post-slew image of 15-350 keV band

    Time interval of the image:
    117.828600 302.807600
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
     83.6330  22.0084    0.7  41.3  129.2   8.0452  16.2    0.4	Crab                          
     98.7521  25.3763    3.0  46.5  148.4   1.9132   3.9 ------	UNKNOWN                       
    131.7441 -24.9435    2.5  43.3 -122.3   2.2039   4.6 ------	UNKNOWN                       
    132.9312 -25.9287    2.5  44.3 -120.8   2.7357   4.6 ------	UNKNOWN                       
    
    Plot creation:
    Sun May 31 15:05:36 EDT 2015