batgrbproduct Analysis for Trigger=374598

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Sun Jan 19 13:05:58 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger374598
======================================================================

  Trigger: 00374598      Segment: 000

  BAT Trigger Time: 278865283.584   [s; MET]
      Trigger Stop: 278865284.608   [s; MET]
               UTC: 2009-11-02T14:34:38.358760    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 72.6742345146145   Dec: -72.5096722528519  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    13.01
     Image Trigger?:     NO
     Rate S/N Ratio:     29.8496231131986  [ if not an image trigger ]
     Image S/N Ratio:    13.01

  Flight Position:   [ source = BAT ]
    RA: 72.6742345146145   Dec: -72.5096722528519  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 72.6217139100931   Dec: -72.5272957296157  [deg; J2000]  
        { 04h 50m 29.2s , -72d 31' 38.3" }
         +/- 1.188577421284 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.444833580463779 [arcmin] (formal 1-sigma fit error)
    SNR: 23.7649153381865
 
  Angular difference between Flight and Ground position is 1.419229 arcmin
 
  Partial Coding Fraction: 0.8046875    [ including projection effects ]

  Duration
     T90: 6.6479999423027 +/- 0.466699022673212
        Measured from: -0.412000000476837
                   to: 6.23599994182587     [s; relative to TRIGTIME]
     T50: 3.37999993562698 +/- 0.856861668927801
        Measured from: 0.544000029563904
                   to: 3.92399996519089     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.255999982357025     
                   to: 0.744000017642975     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.779999971389771     
                   to: 6.63200002908707     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.146619   0.270290   0.238510   0.104995
           0.015270   0.017028   0.016113   0.014644 [error]
 Peak      0.040105   0.065762   0.062156   0.023138
           0.005827   0.006666   0.006542   0.005973 [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 4.30e-08 1.02e-07 1.94e-07 8.90e-07 5.24e-07 1.23e-06   erg/cm2
              Error 5.74e-09 8.07e-09 1.55e-08 1.63e-07 4.01e-08 1.72e-07   erg/cm2
Peak flux Power-law 3.33e-01 4.37e-01 4.20e-01 7.17e-01 1.43e+00 1.91e+00   ph/cm2/s
              Error 6.77e-02 5.41e-02 5.24e-02 1.91e-01 1.53e-01 2.34e-01   ph/cm2/s
 
Fluence   Cutoff-PL 4.17e-08 1.04e-07 1.96e-07 7.02e-07 5.19e-07 1.04e-06   erg/cm2
              Error 6.76e-09 9.26e-09 1.74e-08 2.82e-07 4.43e-08 2.54e-07   erg/cm2
Peak flux Cutoff-PL 3.13e-01 4.51e-01 4.33e-01 4.77e-01 1.41e+00 1.67e+00   ph/cm2/s
              Error 7.91e-02 6.26e-02 5.99e-02 3.37e-01 1.58e-01 3.69e-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    1.079    0.121    -      -           6.72e-03 4.55e-04   40.550 57
CPL   0.926    0.360     375.3    0.0      7.96e-03 3.68e-03   40.240 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.058    0.185    -      -           1.24e-02 1.32e-03   70.540 57
CPL   0.721    0.616     197.3    0.0      1.81e-02 1.65e-02   69.850 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: 6.656000 sec.
T50 in the 50-300 keV band: 4.480000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    7.412   -0.780    6.632
T90     6.648   -0.412    6.236
T50     3.380    0.544    3.924
Peak    1.000   -0.256    0.744
  • 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
       72.6217   -72.5273   0.0080    17.3622   -81.3692         0.7818382     23.765 TRIG_00374598                 
     
    Foreground time interval of the image:
     -0.780   6.632 (delta_t =   7.412 [sec])
    Background time interval of the image:
    -239.584  -0.780 (delta_t = 238.804 [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   -0.780 sec. to    6.632 sec.
     
    Spectral model in power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 1.07922     ( -0.121793   0.119947 )
    Norm@50keV  : 6.72200E-03    ( -0.000454734   0.000454571 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          40.55 using 59 PHA bins.
    # Reduced chi-squared =         0.7114 for     57 degrees of freedom 
    # Null hypothesis probability =   9.511406e-01
     
    Photon flux (15-150 keV)    in 7.412 sec: 0.778214 ( -0.053654  0.0537061 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 5.24415e-07 ( -3.99769e-08  4.02447e-08 ) ergs/cm2
     
    
    Cutoff power-law model
    Time interval is from   -0.780 sec. to    6.632 sec.
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 0.926329     ( -0.506959   0.21287 )
    Epeak [keV] : 375.339      ( -375.408 -375.408 )
    Norm@50keV  : 7.95777E-03    ( -0.00161933   0.00574543 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          40.24 using 59 PHA bins.
    # Reduced chi-squared =         0.7185 for     56 degrees of freedom 
    # Null hypothesis probability =   9.444286e-01
     
    Photon flux (15-150 keV)    in 7.412 sec: 0.773058 ( -0.055984  0.055624 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 5.18612e-07 ( -4.4787e-08  4.3862e-08 ) ergs/cm2
     
    
    Band function
    Time interval is from   -0.780 sec. to    6.632 sec.
     
    Spectral model in the Band function:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    alpha       : 5.29570E-03   ( 0.195254   0.195254 )
    beta        : -1.22874    ( 1.22796   0.210652 )
    Epeak [keV] : 71.0154      ( -70.3424 257.89 )
    Norm@50keV   : 2.87796E-02    ( -0.0303549   81.0116 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          38.16 using 59 PHA bins.
    # Reduced chi-squared =         0.6939 for     55 degrees of freedom 
    # Null hypothesis probability =   9.591570e-01
     
    Photon flux (15-150 keV)    in 7.412 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]    : 19.0407  (-1.77118  2.04401)
    R^2/D10^2   : 4.25782E-02  (-0.011932   0.0159262)
    (R is the radius in km and D10 is the distance to the source in units of 10 kpc)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          77.61 using 59 PHA bins.
    # Reduced chi-squared =          1.362 for     57 degrees of freedom 
    # Null hypothesis probability =   3.612812e-02
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  2.247e-08   3.057e-09
    25- 50  1.083e-07   1.030e-08
    50-150  2.885e-07   3.862e-08
    15-150  4.193e-07   3.632e-08
    
    Thermal bremsstrahlung (OTTB)
     
     
    Spectral model: thermal bremsstrahlung
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT [keV]    : 200.000       (      )
    Norm        : 3.15585       (-0.220639     0.220625)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          79.81 using 59 PHA bins.
    # Reduced chi-squared =          1.400 for     57 degrees of freedom 
    # Null hypothesis probability =   2.474877e-02
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  5.826e-08   4.866e-09
    25- 50  1.121e-07   1.553e-08
    50-150  2.458e-07   8.561e-08
    15-150  4.161e-07   1.051e-07
    
    Double BB
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT1 [keV]   : 11.8016        (      )
    R1^2/D10^2  : 0.150275        (-0.0490722      0.120041)
    kT2 [keV]   : 87.5258        (-48.0125      -87.5243)
    R2^2/D10^2  : 5.05380E-04    (-0.000347968   0.00291571)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          38.10 using 59 PHA bins.
    #Fit statistic : Chi-Squared =          35.49 using 59 PHA bins.
    # Reduced chi-squared =         0.6927 for     55 degrees of freedom 
    # Reduced chi-squared =         0.6452 for     55 degrees of freedom 
    # Null hypothesis probability =   9.598418e-01
    # Null hypothesis probability =   9.810386e-01
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  3.649e-08   1.441e-08
    25- 50  1.115e-07   3.387e-08
    50-150  3.501e-07   1.677e-07
    15-150  4.981e-07   2.085e-07
    

    Peak spectrum fit

    Power-law model
    Time interval is from   -0.256 sec. to    0.744 sec.
     
    Spectral model in power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 1.05757     ( -0.187243   0.183376 )
    Norm@50keV  : 1.23515E-02    ( -0.00131697   0.00131692 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          70.54 using 59 PHA bins.
    # Reduced chi-squared =          1.237 for     57 degrees of freedom 
    # Null hypothesis probability =   1.073420e-01
     
    Photon flux (15-150 keV)    in 1 sec: 1.42739 ( -0.153238  0.153318 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 1.3094e-07 ( -1.6111e-08  1.63096e-08 ) ergs/cm2
     
    
    Cutoff power-law model
    Time interval is from   -0.256 sec. to    0.744 sec.
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 0.721329     ( -0.8026   0.428887 )
    Epeak [keV] : 197.292      ( -197.38 -197.38 )
    Norm@50keV  : 1.80932E-02    ( -0.00723223   0.0256789 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          69.85 using 59 PHA bins.
    # Reduced chi-squared =          1.247 for     56 degrees of freedom 
    # Null hypothesis probability =   1.010006e-01
     
    Photon flux (15-150 keV)    in 1 sec: 1.40830 ( -0.15878  0.15816 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 1.27268e-07 ( -1.8316e-08  1.7992e-08 ) ergs/cm2
     
    
    Band function
    Time interval is from   -0.256 sec. to    0.744 sec.
     
    Spectral model in the Band function:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    alpha       : 5.00000   ( -3.35604   -5 )
    beta        : -1.17857    ( -0.227259   0.218022 )
    Epeak [keV] : 28.5239      ( -9.55174 22.094 )
    Norm@50keV   : 428.230    ( -45.3746   4115.3 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          67.57 using 59 PHA bins.
    # Reduced chi-squared =          1.229 for     55 degrees of freedom 
    # Null hypothesis probability =   1.188792e-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]    : 18.6995  (-2.66948  3.33054)
    R^2/D10^2   : 8.35100E-02  (-0.0339361   0.0538771)
    (R is the radius in km and D10 is the distance to the source in units of 10 kpc)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          83.85 using 59 PHA bins.
    # Reduced chi-squared =          1.471 for     57 degrees of freedom 
    # Null hypothesis probability =   1.183537e-02
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  5.772e-09   1.237e-09
    25- 50  2.745e-08   4.695e-09
    50-150  7.031e-08   1.445e-08
    15-150  1.035e-07   1.717e-08
    
    Thermal bremsstrahlung (OTTB)
     
     
    Spectral model: thermal bremsstrahlung
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT [keV]    : 200.000       (      )
    Norm        : 5.61003       (-0.625896     0.625896)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          87.46 using 59 PHA bins.
    # Reduced chi-squared =          1.534 for     57 degrees of freedom 
    # Null hypothesis probability =   5.851134e-03
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  1.406e-08   7.765e-09
    25- 50  2.705e-08   1.484e-08
    50-150  5.933e-08   3.268e-08
    15-150  1.004e-07   5.510e-08
    
    Double BB
     
     
    Spectral model: bbodyrad<1> + bbodyrad<2>
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT1 [keV]   : 9.94708        (-3.38561      3.97823)
    R1^2/D10^2  : 0.406443        (-0.237466      0.864737)
    kT2 [keV]   : 42.8123        (-17.7473      -43.4074)
    R2^2/D10^2  : 5.03132E-03    (-0.00476782   0.0209034)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          68.16 using 59 PHA bins.
    # Reduced chi-squared =          1.239 for     55 degrees of freedom 
    # Null hypothesis probability =   1.095751e-01
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  9.308e-09   4.685e-09
    25- 50  2.805e-08   1.381e-08
    50-150  9.198e-08   4.953e-08
    15-150  1.293e-07   6.365e-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: 1.07922     ( -0.121793   0.119947 )
    Norm@50keV  : 6.72200E-03    ( -0.000454734   0.000454571 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          40.55 using 59 PHA bins.
    # Reduced chi-squared =         0.7114 for     57 degrees of freedom 
    # Null hypothesis probability =   9.511406e-01
     
    Photon flux (15-150 keV)    in 7.412 sec: 0.778214 ( -0.053654  0.0537061 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 5.24415e-07 ( -3.99769e-08  4.02447e-08 ) ergs/cm2
     
    
    Cutoff power-law model
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 0.926329     ( -0.506959   0.21287 )
    Epeak [keV] : 375.339      ( -375.408 -375.408 )
    Norm@50keV  : 7.95777E-03    ( -0.00161933   0.00574543 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          40.24 using 59 PHA bins.
    # Reduced chi-squared =         0.7185 for     56 degrees of freedom 
    # Null hypothesis probability =   9.444286e-01
     
    Photon flux (15-150 keV)    in 7.412 sec: 0.773058 ( -0.055984  0.055624 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 5.18612e-07 ( -4.4787e-08  4.3862e-08 ) ergs/cm2
     
    
    Band function
     
    Spectral model in the Band function:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    alpha       : 5.29570E-03   ( 0.195254   0.195254 )
    beta        : -1.22874    ( 1.22796   0.210652 )
    Epeak [keV] : 71.0154      ( -70.3424 257.938 )
    Norm@50keV   : 2.87796E-02    ( -0.0303549   81.0309 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          38.16 using 59 PHA bins.
    # Reduced chi-squared =         0.6939 for     55 degrees of freedom 
    # Null hypothesis probability =   9.591570e-01
     
    Photon flux (15-150 keV)    in 7.412 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)  = 1.02e-07
    S(50-100 keV) = 1.94e-07
    

    T90 vs. Hardness ratio plot

    T90                                   = 6.6479999423027 sec.
    Hardness ratio (energy fluence ratio) = 1.90196
    

    Color vs. Color plot

    Count Ratio  (25-50 keV) / (15-25 keV) = 1.84349
    Count Ratio (50-100 keV) / (15-25 keV) = 1.62673
    

    Mask shadow pattern

    IMX = 4.691906941692836E-02, IMY = 3.091151598307949E-01
    

    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:
    -239.584000 -0.780000
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
    135.6842 -40.5432    5.0  49.8 -143.1   1.3426   2.3    7.1	Vela X-1                      
    336.4722 -44.3801    2.3  51.4   -3.5   2.2221   5.1 ------	UNKNOWN                       
    320.8355 -54.9312    2.3  51.2  -22.2   2.3076   5.0 ------	UNKNOWN                       
    270.4519 -78.2937    3.8  44.5  -60.4   2.8168   3.1 ------	UNKNOWN                       
    

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

    Time interval of the image:
    -0.780000 6.632000
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
    135.4026 -40.6125 1293.1  49.6 -143.3  -0.0009  -0.0    6.7	Vela X-1                      
     72.6217 -72.5273    0.5  17.4  -81.4   0.7817  23.7 ------	UNKNOWN                       
     95.2771 -65.5434    2.5  19.3 -114.9   0.1401   4.5 ------	UNKNOWN                       
    323.7758 -78.3246    2.4  37.0  -49.3   0.2449   4.8 ------	UNKNOWN                       
    302.7155 -57.6242    2.4  55.8  -33.8   0.7918   4.9 ------	UNKNOWN                       
    

    Post-slew image of 15-350 keV band

    Time interval of the image:
    276.716600 832.916600
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
    144.6345  14.6371    2.3  44.1    7.7   2.7346   5.1 ------	UNKNOWN                       
    
    Plot creation:
    Sun May 31 02:41:44 EDT 2015