batgrbproduct Analysis for Trigger=283791

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Mon Jan 20 08:41:59 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger283791
======================================================================

  Trigger: 00283791      Segment: 000

  BAT Trigger Time: 205272360   [s; MET]
      Trigger Stop: 205272424   [s; MET]
               UTC: 2007-07-04T20:05:57.934440    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 354.72344217874   Dec: 66.2478751765386  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    16.12
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    16.12

  Flight Position:   [ source = BAT ]
    RA: 354.72344217874   Dec: 66.2478751765386  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 354.708150396136   Dec: 66.257712788269  [deg; J2000]  
        { 23h 38m 50.0s , +66d 15' 27.8" }
         +/- 1.59593398981933 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.79078868209694 [arcmin] (formal 1-sigma fit error)
    SNR: 15.5990108274092
 
  Angular difference between Flight and Ground position is 0.696362 arcmin
 
  Partial Coding Fraction: 0.4257812    [ including projection effects ]

  Duration
     T90: 384.936000019312 +/- 27.4150108395262
        Measured from: -53.6960000097752
                   to: 331.240000009537     [s; relative to TRIGTIME]
     T50: 67.0560000240803 +/- 15.4787551254318
        Measured from: -38.8560000061989
                   to: 28.2000000178814     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -53.0999999940395     
                   to: -52.0999999940395     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -57.3240000009537     
                   to: 400.775999993086     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     2.914171   3.681578   2.598209   0.686572
           0.119704   0.124473   0.108583   0.092745 [error]
 Peak      0.041225   0.087127   0.098112   0.029326
           0.005165   0.005929   0.005765   0.004351 [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 9.30e-07 1.56e-06 2.00e-06 5.12e-06 5.91e-06 9.62e-06   erg/cm2
              Error 6.84e-08 6.69e-08 1.09e-07 6.19e-07 2.58e-07 6.92e-07   erg/cm2
Peak flux Power-law 3.93e-01 5.77e-01 6.32e-01 1.30e+00 2.00e+00 2.90e+00   ph/cm2/s
              Error 5.69e-02 5.09e-02 4.43e-02 1.99e-01 1.37e-01 2.21e-01   ph/cm2/s
 
Fluence   Cutoff-PL 9.22e-07 1.57e-06 2.00e-06 4.73e-06 5.89e-06 9.22e-06   erg/cm2
              Error 7.82e-08 7.37e-08 1.14e-07 1.19e-06 2.81e-07 1.31e-06   erg/cm2
Peak flux Cutoff-PL 3.52e-01 5.87e-01 6.64e-01 8.91e-01 1.97e+00 2.50e+00   ph/cm2/s
              Error 7.33e-02 5.47e-02 5.89e-02 3.56e-01 1.41e-01 2.99e-01   ph/cm2/s
 
Fluence        Band -------- -------- -------- -------- -------- --------   erg/cm2
              Error -------- -------- -------- -------- -------- --------   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    1.646    0.076    -      -           1.39e-03 5.70e-05   70.850 57
CPL   1.609    0.196     535.0    0.0      1.45e-03 3.24e-04   70.800 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.869    0.117    -      -           1.74e-02 1.20e-03   67.100 57
CPL   0.475    0.488     229.5    0.0      2.58e-02 0.00e+00   65.170 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: 357.696000 sec.
T50 in the 50-300 keV band: 61.120000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  458.100  -57.324  400.776
T90   384.936  -53.696  331.240
T50    67.056  -38.856   28.200
Peak    1.000  -53.100  -52.100
  • Click here for the BAT GCN circular template

    Image

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

    #   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
      354.7082    66.2577   0.0123    42.4919   174.4289         2.2258866     15.599 TRIG_00283791                 
     
    Foreground time interval of the image:
     -2.499  72.101 (delta_t =  74.600 [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 64.000000
    

    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 64.000000
    

    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 64.000000
    

    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  -57.324 sec. to  400.776 sec.
     
    Spectral model in power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 1.64619     ( -0.0760207   0.0764155 )
    Norm@50keV  : 1.38642E-03    ( -5.70808e-05   5.68578e-05 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          70.85 using 59 PHA bins.
    # Reduced chi-squared =          1.243 for     57 degrees of freedom 
    # Null hypothesis probability =   1.026738e-01
     
    Photon flux (15-150 keV)    in 458.1 sec: 0.180805 ( -0.00769859  0.00772753 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 5.90912e-06 ( -2.57024e-07  2.58374e-07 ) ergs/cm2
     
    
    Cutoff power-law model
    Time interval is from  -57.324 sec. to  400.776 sec.
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 1.60907     ( -0.284805   0.107711 )
    Epeak [keV] : 534.998      ( -534.998 -534.998 )
    Norm@50keV  : 1.44634E-03    ( -0.000112875   0.000535796 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          70.80 using 59 PHA bins.
    # Reduced chi-squared =          1.264 for     56 degrees of freedom 
    # Null hypothesis probability =   8.801232e-02
     
    Photon flux (15-150 keV)    in 458.1 sec: 0.180238 ( -0.008231  0.008129 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 5.88622e-06 ( -2.81961e-07  2.79762e-07 ) ergs/cm2
     
    
    Band function
    Time interval is from  -57.324 sec. to  400.776 sec.
     
    Spectral model in the Band function:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    alpha       : 4.89654   ( -4.89654   -4.89654 )
    beta        : -1.66995    ( -0.0811462   0.0797348 )
    Epeak [keV] : 21.1547      ( -21.1547 3.34269 )
    Norm@50keV   : 387.429    ( -15.4345   699737 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          69.30 using 59 PHA bins.
    # Reduced chi-squared =          1.260 for     55 degrees of freedom 
    # Null hypothesis probability =   9.288086e-02
     
    Photon flux (15-150 keV)    in 458.1 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]    : 14.3908  (  )
    R^2/D10^2   : 2.19209E-02  (   )
    (R is the radius in km and D10 is the distance to the source in units of 10 kpc)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =         239.15 using 59 PHA bins.
    # Reduced chi-squared =         4.1955 for     57 degrees of freedom 
    # Null hypothesis probability =   3.619692e-24
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  4.380e-07   3.598e-08
    25- 50  1.674e-06   8.910e-08
    50-150  2.314e-06   1.871e-07
    15-150  4.425e-06   2.100e-07
    
    Thermal bremsstrahlung (OTTB)
     
     
    Spectral model: thermal bremsstrahlung
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT [keV]    : 167.268       (-32.2116      -166.88)
    Norm        : 0.729419       (-0.034358     0.0379135)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          74.53 using 59 PHA bins.
    # Reduced chi-squared =          1.308 for     57 degrees of freedom 
    # Null hypothesis probability =   5.940429e-02
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  8.495e-07   5.451e-08
    25- 50  1.599e-06   1.374e-07
    50-150  3.295e-06   9.877e-07
    15-150  5.743e-06   1.147e-06
    
    Double BB
     
     
    Spectral model: bbodyrad<1> + bbodyrad<2>
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT1 [keV]   : 6.66505        (-0.797603      0.883539)
    R1^2/D10^2  : 0.248151        (-0.0883765      0.150965)
    kT2 [keV]   : 26.6424        (-3.37      4.7649)
    R2^2/D10^2  : 1.96572E-03    (-0.000854436   0.0012449)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          71.60 using 59 PHA bins.
    # Reduced chi-squared =          1.302 for     55 degrees of freedom 
    # Null hypothesis probability =   6.563668e-02
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  8.760e-07   1.074e-07
    25- 50  1.583e-06   1.530e-07
    50-150  3.398e-06   4.675e-07
    15-150  5.857e-06   6.482e-07
    

    Peak spectrum fit

    Power-law model
    Time interval is from  -53.100 sec. to  -52.100 sec.
     
    Spectral model in power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 0.868598     ( -0.118438   0.115733 )
    Norm@50keV  : 1.74229E-02    ( -0.00120151   0.00119565 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          67.10 using 59 PHA bins.
    # Reduced chi-squared =          1.177 for     57 degrees of freedom 
    # Null hypothesis probability =   1.692336e-01
     
    Photon flux (15-150 keV)    in 1 sec: 1.99965 ( -0.137094  0.137285 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 1.97965e-07 ( -1.42217e-08  1.42577e-08 ) ergs/cm2
     
    
    Cutoff power-law model
    Time interval is from  -53.100 sec. to  -52.100 sec.
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 0.474702     ( -0.53961   0.435393 )
    Epeak [keV] : 229.459      (   )
    Norm@50keV  : 2.58034E-02    (     )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          65.17 using 59 PHA bins.
    # Reduced chi-squared =          1.164 for     56 degrees of freedom 
    # Null hypothesis probability =   1.880417e-01
     
    Photon flux (15-150 keV)    in 1 sec: 1.97295 ( -0.14106  0.14104 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 1.95117e-07 ( -1.5044e-08  1.4885e-08 ) ergs/cm2
     
    
    Band function
    Time interval is from  -53.100 sec. to  -52.100 sec.
     
    Spectral model in the Band function:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    alpha       : -0.910696   ( 0.910696   0.910696 )
    beta        : -0.868582    ( -0.115627   0.118392 )
    Epeak [keV] : 12.7786      ( -12.7786 -12.7786 )
    Norm@50keV   : 2.64831E-02    ( -0.00977573   426358 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          67.10 using 59 PHA bins.
    # Reduced chi-squared =          1.220 for     55 degrees of freedom 
    # Null hypothesis probability =   1.268520e-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]    : 23.6580  (-2.09548  2.42792)
    R^2/D10^2   : 5.95878E-02  (-0.0154075   0.0198317)
    (R is the radius in km and D10 is the distance to the source in units of 10 kpc)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          88.75 using 59 PHA bins.
    # Reduced chi-squared =          1.557 for     57 degrees of freedom 
    # Null hypothesis probability =   4.500946e-03
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  5.961e-09   8.355e-10
    25- 50  3.285e-08   3.490e-09
    50-150  1.371e-07   1.495e-08
    15-150  1.759e-07   1.445e-08
    
    Thermal bremsstrahlung (OTTB)
     
     
    Spectral model: thermal bremsstrahlung
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT [keV]    : 199.359       (      )
    Norm        : 7.90975       (     )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =         157.04 using 59 PHA bins.
    # Reduced chi-squared =         2.7551 for     57 degrees of freedom 
    # Null hypothesis probability =   2.722671e-11
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  1.970e-08   1.735e-09
    25- 50  3.789e-08   4.675e-09
    50-150  8.310e-08   2.880e-08
    15-150  1.407e-07   2.697e-08
    
    Double BB
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT1 [keV]   : 13.9720        (-3.86995      3.53153)
    R1^2/D10^2  : 0.196365        (-0.087399      0.221321)
    kT2 [keV]   : 67.3971        (-28.2776      -63.3411)
    R2^2/D10^2  : 2.32940E-03    (   )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          64.36 using 59 PHA bins.
    #Fit statistic : Chi-Squared =          64.33 using 59 PHA bins.
    # Reduced chi-squared =          1.170 for     55 degrees of freedom 
    # Reduced chi-squared =          1.170 for     55 degrees of freedom 
    # Null hypothesis probability =   1.815914e-01
    # Null hypothesis probability =   1.822663e-01
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  9.094e-09   2.835e-09
    25- 50  3.696e-08   1.393e-08
    50-150  1.482e-07   7.213e-08
    15-150  1.942e-07   8.632e-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: 2.19692     ( -0.183223   0.194321 )
    Norm@50keV  : 1.72649E-03    ( -0.000221757   0.000216422 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          65.87 using 59 PHA bins.
    # Reduced chi-squared =          1.156 for     57 degrees of freedom 
    # Null hypothesis probability =   1.968964e-01
     
    Photon flux (15-150 keV)    in 74.6 sec: 0.285365 ( -0.0269274  0.0269433 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 1.21044e-06 ( -1.32958e-07  1.35193e-07 ) ergs/cm2
     
    
    Cutoff power-law model
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 1.96879     ( -0.732879   0.0316927 )
    Epeak [keV] : 5.67635      (   )
    Norm@50keV  : 2.34223E-03    (     )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          65.72 using 59 PHA bins.
    # Reduced chi-squared =          1.174 for     56 degrees of freedom 
    # Null hypothesis probability =   1.754798e-01
     
    Photon flux (15-150 keV)    in 74.6 sec: 0.283519 ( -0.027987  0.02787 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 1.19062e-06 ( -1.57473e-07  1.50714e-07 ) ergs/cm2
     
    
    Band function
     
    Spectral model in the Band function:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    alpha       : 4.86705   ( -4.86705   -4.86705 )
    beta        : -2.26628    ( -0.23057   0.204572 )
    Epeak [keV] : 19.6654      ( -19.6654 3.81208 )
    Norm@50keV   : 1276.84    ( -119.193   3.32643e+06 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          64.91 using 59 PHA bins.
    # Reduced chi-squared =          1.180 for     55 degrees of freedom 
    # Null hypothesis probability =   1.695058e-01
     
    Photon flux (15-150 keV)    in 74.6 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)  = 1.56e-06
    S(50-100 keV) = 2.00e-06
    

    T90 vs. Hardness ratio plot

    T90                                   = 384.936000019312 sec.
    Hardness ratio (energy fluence ratio) = 1.28205
    

    Color vs. Color plot

    Count Ratio  (25-50 keV) / (15-25 keV) = 1.26334
    Count Ratio (50-100 keV) / (15-25 keV) = 0.891577
    

    Mask shadow pattern

    IMX = -9.117435255017003E-01, IMY = -8.893280574872918E-02
    

    TIME vs. PHA plot around the trigger time

    Blue+Cyan dotted lines: Time interval of the scaled map
    From 0.000000 to 64.000000
    

    TIME vs. DetID plot around the trigger time

    Blue+Cyan dotted lines: Time interval of the scaled map
    From 0.000000 to 64.000000
    

    100 us light curve (15-350 keV)

    Blue+Cyan dotted lines: Time interval of the scaled map
    From 0.000000 to 64.000000
    

    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:
    -2.499390 72.100600
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
     83.6302  21.9941    1.0  41.1  -68.0   3.0929  11.0    1.2	Crab                          
    354.7083  66.2578    0.7  42.5  174.4   2.2269  15.6 ------	UNKNOWN                       
    310.9041  83.3140    2.2  57.4 -169.1   1.9739   5.1 ------	UNKNOWN                       
    114.5699  76.9668    2.4  55.2 -145.7   2.2600   4.9 ------	UNKNOWN                       
    

    Post-slew image of 15-350 keV band

    Time interval of the image:
    139.100600 963.063000
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
    308.1223  40.9837    2.1  36.0   95.2   5.2415   5.5    1.9	Cyg X-3                       
    326.0539  38.4124    4.1  32.3   71.0   2.3676   2.8    7.8	Cyg X-2                       
    354.6999  66.2193    2.2   0.0   84.3   2.0403   5.2 ------	UNKNOWN                       
    206.5843  53.0761    3.0  58.3 -175.7  10.5488   3.9 ------	UNKNOWN                       
     96.1936  82.5660    3.3  26.2 -137.1   1.4276   3.5 ------	UNKNOWN                       
    192.8901  53.9797    2.7  59.0 -166.1  11.6144   4.2 ------	UNKNOWN                       
    
    Plot creation:
    Sun May 31 09:49:05 EDT 2015