batgrbproduct analysis for trigger=773509

batgrbproduct Analysis for Trigger=773509

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Fri Oct 20 14:34:01 EDT 2017
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger773509
======================================================================

  Trigger: 00773509      Segment: 000

  BAT Trigger Time: 527696948.224   [s; MET]
      Trigger Stop: 527696952.32   [s; MET]
               UTC: 2017-09-21T14:28:48.502900    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 26.8495479369481   Dec: 30.8742207954133  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    10.2
     Image Trigger?:     NO
     Rate S/N Ratio:     16.8819430161341  [ if not an image trigger ]
     Image S/N Ratio:    10.2

  Flight Position:   [ source = BAT ]
    RA: 26.8495479369481   Dec: 30.8742207954133  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 26.8406911730994   Dec: 30.8796537098092  [deg; J2000]  
        { 01h 47m 21.8s , +30d 52' 46.8" }
         +/- 1.8530781230834 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.805485407365669 [arcmin] (formal 1-sigma fit error)
    SNR: 12.6012333217451
 
  Angular difference between Flight and Ground position is 0.560605 arcmin
 
  Partial Coding Fraction: 0.8671875    [ including projection effects ]

  Duration
     T90: 28.8000000119209 +/- 5.92553253459488
        Measured from: -18.2960000038147
                   to: 10.5040000081062     [s; relative to TRIGTIME]
     T50: 7.74400001764297 +/- 5.94959091543058
        Measured from: -1.84799998998642
                   to: 5.89600002765656     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 2.74000000953674     
                   to: 3.74000000953674     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -21.8159999847412     
                   to: 13     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.357408   0.539242   0.235640   0.043104
           0.041420   0.042598   0.037101   0.032268 [error]
 Peak      0.038391   0.030822   0.029113   0.010913
           0.007219   0.007705   0.006851   0.005700 [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 1.18e-07 1.85e-07 2.19e-07 5.01e-07 6.69e-07 1.02e-06   erg/cm2
              Error 1.71e-08 1.87e-08 3.41e-08 1.55e-07 8.10e-08 1.90e-07   erg/cm2
Peak flux Power-law 2.87e-01 2.63e-01 1.66e-01 1.61e-01 7.83e-01 8.78e-01   ph/cm2/s
              Error 9.99e-02 5.82e-02 5.75e-02 1.14e-01 1.72e-01 2.04e-01   ph/cm2/s
 
Fluence   Cutoff-PL 9.99e-08 2.23e-07 2.05e-07 5.78e-08 5.75e-07 5.85e-07   erg/cm2
              Error 2.01e-08 2.79e-08 4.49e-08 7.25e-08 8.49e-08 1.10e-07   erg/cm2
Peak flux Cutoff-PL 2.74e-01 2.04e-01 1.05e-01 9.25e-02 6.21e-01 6.76e-01   ph/cm2/s
              Error -------- 8.55e-02 3.23e-02 3.47e-02 2.23e-01 2.71e-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    1.759    0.173    -      -           2.08e-03 2.43e-04   58.760 57
CPL   0.067    1.054      48.5    7.5      1.89e-02 4.47e-02   47.220 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.659    0.436    -      -           5.98e-03 1.55e-03   67.290 57
CPL   2.244    1.120      90.6    0.0      3.02e-03 0.00e+00   67.170 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: 8.896000 sec.
T50 in the 50-300 keV band: 4.544000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   34.816  -21.816   13.000
T90    28.800  -18.296   10.504
T50     7.744   -1.848    5.896
Peak    1.000    2.740    3.740
  • Click here for the BAT GCN circular template
  • Estimated redshift from machine learning (Ukwatta et al. 2016) - may take a few minute to calcaulte
  • 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
       26.8407    30.8797   0.0153    14.0080    86.4636         1.0985798     12.601 TRIG_00773509                 
     
    Foreground time interval of the image:
    -21.816  13.000 (delta_t =  34.816 [sec])
    Background time interval of the image:
    -239.224 -21.816 (delta_t = 217.408 [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 4.096000
    

    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 4.096000
    

    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 4.096000
    

    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  -21.816 sec. to   13.000 sec.
     
    Spectral model in power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 1.75914     ( -0.169665   0.175926 )
    Norm@50keV  : 2.07772E-03    ( -0.000244199   0.000240883 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          58.76 using 59 PHA bins.
    # Reduced chi-squared =          1.031 for     57 degrees of freedom 
    # Null hypothesis probability =   4.107819e-01
     
    Photon flux (15-150 keV)    in 34.82 sec: 0.281908 ( -0.028606  0.028614 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 6.67357e-07 ( -8.02611e-08  8.17417e-08 ) ergs/cm2
     
    
    Cutoff power-law model
    Time interval is from  -21.816 sec. to   13.000 sec.
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 6.65121E-02     ( -1.18272   0.926106 )
    Epeak [keV] : 48.5278      ( -6.70072 8.22668 )
    Norm@50keV  : 1.88750E-02    ( -0.0188772   0.0706181 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          47.22 using 59 PHA bins.
    # Reduced chi-squared =         0.8432 for     56 degrees of freedom 
    # Null hypothesis probability =   7.920156e-01
     
    Photon flux (15-150 keV)    in 34.82 sec: 0.266217 ( -0.029455  0.029566 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 5.74857e-07 ( -8.09008e-08  8.89602e-08 ) ergs/cm2
     
    
    Band function
    Time interval is from  -21.816 sec. to   13.000 sec.
     
     
    Spectral model in the Band function:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    alpha       :    (     )
    beta        :     (     )
    Epeak [keV] :       (   )
    Norm@50keV   :     (     )
    ------------------------------------------------------------
     
    Photon flux (15-150 keV)    in  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]    : 11.4123  (-1.1437  1.29293)
    R^2/D10^2   : 8.60040E-02  (-0.0283484   0.0411634)
    (R is the radius in km and D10 is the distance to the source in units of 10 kpc)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          51.92 using 59 PHA bins.
    # Reduced chi-squared =         0.9108 for     57 degrees of freedom 
    # Null hypothesis probability =   6.657458e-01
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  8.202e-08   1.386e-08
    25- 50  2.429e-07   2.746e-08
    50-150  1.837e-07   4.588e-08
    15-150  5.087e-07   6.407e-08
    
    Thermal bremsstrahlung (OTTB)
     
     
    Spectral model: thermal bremsstrahlung
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT [keV]    : 95.9506       (-27.9433      51.5235)
    Norm        : 1.27549       (-0.164901     0.194293)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          52.30 using 59 PHA bins.
    # Reduced chi-squared =         0.9175 for     57 degrees of freedom 
    # Null hypothesis probability =   6.518038e-01
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  1.160e-07   1.755e-08
    25- 50  1.990e-07   2.437e-08
    50-150  3.148e-07   1.320e-07
    15-150  6.299e-07   1.490e-07
    
    Double BB
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT1 [keV]   : 8.08649        (-7.57306      -7.57378)
    R1^2/D10^2  : 0.186042        (-0.111378      -0.18462)
    kT2 [keV]   : 18.3492        (-18.5738      -18.574)
    R2^2/D10^2  : 8.12810E-03    (-0.0076345   0.0820842)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          47.43 using 59 PHA bins.
    #Fit statistic : Chi-Squared =          47.39 using 59 PHA bins.
    # Reduced chi-squared =         0.8623 for     55 degrees of freedom 
    # Reduced chi-squared =         0.8616 for     55 degrees of freedom 
    # Null hypothesis probability =   7.560594e-01
    # Null hypothesis probability =   7.573169e-01
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  9.742e-08   5.416e-08
    25- 50  2.257e-07   1.192e-07
    50-150  2.520e-07   1.385e-07
    15-150  5.751e-07   2.881e-07
    

    Peak spectrum fit

    Power-law model
    Time interval is from    2.740 sec. to    3.740 sec.
     
    Spectral model in power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 1.65938     ( -0.417728   0.453788 )
    Norm@50keV  : 5.98108E-03    ( -0.00160672   0.00150309 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          67.29 using 59 PHA bins.
    # Reduced chi-squared =          1.181 for     57 degrees of freedom 
    # Null hypothesis probability =   1.653594e-01
     
    Photon flux (15-150 keV)    in 1 sec: 0.783444 ( -0.172347  0.172354 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 5.55815e-08 ( -1.52829e-08  1.58106e-08 ) ergs/cm2
     
    
    Cutoff power-law model
    Time interval is from    2.740 sec. to    3.740 sec.
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 2.24371     ( -1.4725   0.767739 )
    Epeak [keV] : 90.6312      (   )
    Norm@50keV  : 3.02449E-03    (     )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          67.17 using 59 PHA bins.
    # Reduced chi-squared =          1.200 for     56 degrees of freedom 
    # Null hypothesis probability =   1.457616e-01
     
    Photon flux (15-150 keV)    in 1 sec: 0.621499 ( -0.26491  0.182075 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 3.88562e-08 ( -1.57792e-08  9.73974e-09 ) ergs/cm2
     
    
    Band function
    Time interval is from    2.740 sec. to    3.740 sec.
     
     
    Spectral model in the Band function:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    alpha       :    (     )
    beta        :     (     )
    Epeak [keV] :       (   )
    Norm@50keV   :     (     )
    ------------------------------------------------------------
     
    Photon flux (15-150 keV)    in  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]    : 13.5889  (-7.31113  8.77633)
    R^2/D10^2   : 0.114719  (-0.0959209   1.85821)
    (R is the radius in km and D10 is the distance to the source in units of 10 kpc)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          79.82 using 59 PHA bins.
    # Reduced chi-squared =          1.400 for     57 degrees of freedom 
    # Null hypothesis probability =   2.472058e-02
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  6.113e-09   3.453e-09
    25- 50  1.724e-08   7.997e-09
    50-150  1.171e-08   7.858e-09
    15-150  3.506e-08   1.896e-08
    
    Thermal bremsstrahlung (OTTB)
     
     
    Spectral model: thermal bremsstrahlung
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT [keV]    : 177.090       (-115.603      -175.388)
    Norm        : 3.17549       (-0.719036     1.06108)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          68.21 using 59 PHA bins.
    # Reduced chi-squared =          1.197 for     57 degrees of freedom 
    # Null hypothesis probability =   1.470147e-01
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  8.023e-09   4.601e-09
    25- 50  1.521e-08   8.710e-09
    50-150  3.202e-08   1.871e-08
    15-150  5.525e-08   3.177e-08
    
    Double BB
     
     
    Spectral model: bbodyrad<1> + bbodyrad<2>
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT1 [keV]   : 5.09450        (-1.60937      2.07682)
    R1^2/D10^2  : 3.52479        (-2.65004      14.8286)
    kT2 [keV]   : 29.2389        (-10.6147      38.4355)
    R2^2/D10^2  : 7.34336E-03    (-0.00648863   0.0245696)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          64.46 using 59 PHA bins.
    # Reduced chi-squared =          1.172 for     55 degrees of freedom 
    # Null hypothesis probability =   1.793050e-01
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  1.023e-08   6.020e-09
    25- 50  1.240e-08   6.595e-09
    50-150  3.740e-08   2.334e-08
    15-150  6.004e-08   3.253e-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: 1.75914     ( -0.169665   0.175926 )
    Norm@50keV  : 2.07772E-03    ( -0.000244199   0.000240883 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          58.76 using 59 PHA bins.
    # Reduced chi-squared =          1.031 for     57 degrees of freedom 
    # Null hypothesis probability =   4.107819e-01
     
    Photon flux (15-150 keV)    in 34.82 sec: 0.281895 ( -0.0286042  0.0286119 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 6.67252e-07 ( -8.02134e-08  8.17737e-08 ) ergs/cm2
     
    
    Cutoff power-law model
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 6.64479E-02     ( -1.1827   0.926124 )
    Epeak [keV] : 48.5275      ( -6.70073 12.5347 )
    Norm@50keV  : 1.88766E-02    ( -0.0188772   0.0706178 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          47.22 using 59 PHA bins.
    # Reduced chi-squared =         0.8432 for     56 degrees of freedom 
    # Null hypothesis probability =   7.920156e-01
     
    Photon flux (15-150 keV)    in 34.82 sec: 0.266186 ( -0.029447  0.029558 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 5.75024e-07 ( -8.09739e-08  8.88328e-08 ) ergs/cm2
     
    
    Band function
     
     
    Spectral model in the Band function:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    alpha       :    (     )
    beta        :     (     )
    Epeak [keV] :       (   )
    Norm@50keV   :     (     )
    ------------------------------------------------------------
     
    Photon flux (15-150 keV)    in  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)  = 1.85e-07
    S(50-100 keV) = 2.19e-07
    

    T90 vs. Hardness ratio plot

    T90                                   = 28.8000000119209 sec.
    Hardness ratio (energy fluence ratio) = 1.18378
    

    Color vs. Color plot

    Count Ratio  (25-50 keV) / (15-25 keV) = 1.50876
    Count Ratio (50-100 keV) / (15-25 keV) = 0.659303
    

    Mask shadow pattern

    IMX = 1.538833695729371E-02, IMY = -2.490014657164326E-01
    

    TIME vs. PHA plot around the trigger time

    Blue+Cyan dotted lines: Time interval of the scaled map
    From 0.000000 to 4.096000
    

    TIME vs. DetID plot around the trigger time

    Blue+Cyan dotted lines: Time interval of the scaled map
    From 0.000000 to 4.096000
    

    100 us light curve (15-350 keV)

    Blue+Cyan dotted lines: Time interval of the scaled map
    From 0.000000 to 4.096000
    

    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:
    -239.224000 -21.816000
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
     83.6175  21.9941    0.6  44.8  -24.2   8.3999  20.6    1.5	Crab                          
    325.9375  38.4099    0.0  51.5  163.7   3.1532   3.4   12.2	Cyg X-2                       
     64.6359  -3.8586    2.5  53.7   16.7   4.6732   4.6 ------	UNKNOWN                       
     72.6056  -1.4005    2.5  55.4    6.7   5.0672   4.7 ------	UNKNOWN                       
    

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

    Time interval of the image:
    -21.816000 13.000000
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
     83.6491  22.1945    6.0  44.7  -24.4   0.2748   1.9   10.8	Crab                          
    326.1750  38.3138  134.5  51.4  163.5   0.0276   0.1    0.5	Cyg X-2                       
     46.0415   6.5880    2.6  37.6   36.5   0.5916   4.5 ------	UNKNOWN                       
     26.8407  30.8796    0.9  14.0   86.5   1.0983  12.6 ------	UNKNOWN                       
     92.1097  12.5773    2.2  57.1  -22.0   1.9253   5.2 ------	UNKNOWN                       
    

    Post-slew image of 15-350 keV band

    Time interval of the image:
    81.076600 962.796400
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
    326.3497  38.1678    0.0  49.5  160.6  -3.0032  -1.4   12.5	Cyg X-2                       
    321.2868  37.4888    3.7  53.6  160.8  11.4237   3.2 ------	UNKNOWN                       
    
    Plot creation:
    Fri Oct 20 14:59:24 EDT 2017