batgrbproduct Analysis for Trigger=589505

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Tue Mar 18 23:04:09 EDT 2014
             Host Name: bat1
   Current Working Dir: /net/raid16/prebascript_archive/trigger589505/heasarc_download
======================================================================

  Trigger: 00589505      Segment: 000

  BAT Trigger Time: 415324272   [s; MET]
      Trigger Stop: 415325840   [s; MET]
               UTC: 2014-02-28T23:51:00.296980    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 266.136018600414   Dec: -28.7399415238985  [deg; J2000]

     Catalogged Source?: YES
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    24.74
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    24.74

  Flight Position:   [ source = BAT ]
    RA: 266.136018600414   Dec: -28.7399415238985  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 266.140258022931   Dec: -28.7548694854403  [deg; J2000]  
        { 17h 44m 33.7s , -28d 45' 17.5" }
         +/- 1.21814169204791 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.673678990234827 [arcmin] (formal 1-sigma fit error)
    SNR: 22.9452577487572
 
  Angular difference between Flight and Ground position is 0.923024 arcmin
 
  Partial Coding Fraction: 0.890625    [ including projection effects ]

  Duration
     T90: 1568 +/- 
        Measured from: 0
                   to: 1568     [s; relative to TRIGTIME]
     T50: 1568 +/- 
        Measured from: 0
                   to: 1568     [s; relative to TRIGTIME]

    WARNING: battblocks failed.  Used TDRSS fore/background intervals

  Fluence
     Peak Flux  (peak 1568 second)
        Measured from: 0     
                   to: 1568     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0     
                   to: 1568     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     4.109786   1.573618   0.099486  -0.072962
           0.121746   0.109650   0.090500   0.077875 [error]
 Peak      4.109786   1.573618   0.099486  -0.072962
           0.121746   0.109650   0.090500   0.077875 [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 1.35e-06 6.61e-07 1.97e-07 7.45e-08 2.25e-06 2.29e-06   erg/cm2
              Error 1.13e-07 6.38e-08 4.40e-08 2.95e-08 1.57e-07 1.62e-07   erg/cm2
Peak flux Power-law 1.27e-01 3.54e-02 5.29e-03 8.98e-04 1.69e-01 1.69e-01   ph/cm2/s
              Error 1.10e-02 3.24e-03 1.14e-03 3.37e-04 1.19e-02 1.19e-02   ph/cm2/s
 
Fluence   Cutoff-PL 1.30e-06 6.59e-07 4.01e-08 9.52e-11 2.00e-06 2.00e-06   erg/cm2
              Error 1.24e-07 7.91e-08 3.86e-08 1.04e-09 1.63e-07 1.63e-07   erg/cm2
Peak flux Cutoff-PL 1.20e-01 3.65e-02 1.22e-03 1.54e-06 1.58e-01 1.58e-01   ph/cm2/s
              Error 1.23e-02 3.92e-03 1.10e-03 1.61e-05 1.30e-02 1.30e-02   ph/cm2/s
 
Fluence        Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   erg/cm2
              Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   erg/cm2
Peak flux      Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   ph/cm2/s
              Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    3.744    0.207    -      -           3.41e-04 5.75e-05   60.800 57
CPL   1.000    0.000      50.0    0.0      1.91e-03 0.00e+00  333.360 56
 
The chi2 of BB fit is 48.39 which shows a significant improvement in the fit over a PL.
Check the BB fit.
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    3.744    0.207    -      -           3.41e-04 5.75e-05   60.800 57
CPL   1.000    0.000      50.0    0.0      1.91e-03 0.00e+00  333.360 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 1568.000    0.000 1568.000
T90  1568.000    0.000 1568.000
T50  1568.000    0.000 1568.000
Peak 1568.000    0.000 1568.000
  • Click here for the BAT GCN circular template

    Image

    Pre-slew 15-350 keV image (Event data; bkg subtracted)

    #   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
      266.1403 -28.7549 0.0084   21.4   16.8       6.2199    22.9  TRIG_00589505       
    ------------------------------------------
     
    Foreground time interval of the image:
    276.000 303.020 (delta_t =  27.020 [sec])
    631.000 963.055 (delta_t = 332.055 [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

    8 ms binning

    From T100_start-3 s to T100_start+3 s

    2 ms binning

    From T100_start-1 s to T100_start+1 s

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

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

    The mask-weighted light curves based on cleaned DPHs

    Spectra

    Notes:

    Time averaged spectrum fit using the pre-slew DRM

    Power-law model
    Multiple GTIs in the spectrum
    tstart tstop
    276.000000 303.020000
    631.000400 963.055100
     
    Spectral model in power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 3.74418     ( -0.2024   0.211554 )
    Norm@50keV  : 3.40988E-04    ( -5.5546e-05   5.94741e-05 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          60.80 using 59 PHA bins.
    # Reduced chi-squared =          1.067 for     57 degrees of freedom 
    # Null hypothesis probability =   3.407969e-01
     
    Photon flux (15-150 keV)    in 359.1 sec: 0.168805 ( -0.0118596  0.0119026 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 2.25454e-06 ( -1.56164e-07  1.56872e-07 ) ergs/cm2
     
    
    Cutoff power-law model
    Multiple GTIs in the spectrum
    tstart tstop
    276.000000 303.020000
    631.000400 963.055100
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 1.00000     (     )
    Epeak [keV] : 50.0000      (   )
    Norm@50keV  : 1.91498E-03    (     )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =         333.36 using 59 PHA bins.
    # Reduced chi-squared =         5.9528 for     56 degrees of freedom 
    # Null hypothesis probability =   4.388487e-41
     
    Photon flux (15-150 keV)    in 359.1 sec: 0.157545 ( -0.013019  0.012954 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 1.99703e-06 ( -1.6027e-07  1.6473e-07 ) ergs/cm2
     
    
    Band function
    Multiple GTIs in the spectrum
    tstart tstop
    276.000000 303.020000
    631.000400 963.055100
     
    Spectral model in the Band function:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    alpha       : -0.574598   ( -0.447541   0.060614 )
    beta        : -9.99759    ( 9.99759   0.0974385 )
    Epeak [keV] : 11.8383      ( -1.35187 1.21869 )
    Norm@50keV   : 7.16510E-02    ( -0.00478274   3.90459 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          45.39 using 59 PHA bins.
    # Reduced chi-squared =         0.8253 for     55 degrees of freedom 
    # Null hypothesis probability =   8.189388e-01
     
    Photon flux (15-150 keV)    in 359.1 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]    : 4.51040  (-0.290547  0.314754)
    R^2/D10^2   : 2.20606  (-0.67897   0.993525)
    (R is the radius in km and D10 is the distance to the source in units of 10 kpc)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          48.39 using 59 PHA bins.
    # Reduced chi-squared =         0.8490 for     57 degrees of freedom 
    # Null hypothesis probability =   7.844419e-01
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  1.252e-06   1.388e-07
    25- 50  6.286e-07   7.900e-08
    50-150  1.513e-08   5.855e-09
    15-150  1.896e-06   1.779e-07
    
    Thermal bremsstrahlung (OTTB)
     
     
    Spectral model: thermal bremsstrahlung
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT [keV]    : 11.3370       (-1.25826      1.48061)
    Norm        : 4.44548       (-0.978432     1.29076)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          46.26 using 59 PHA bins.
    # Reduced chi-squared =         0.8116 for     57 degrees of freedom 
    # Null hypothesis probability =   8.446269e-01
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  1.320e-06   1.311e-07
    25- 50  6.672e-07   8.008e-08
    50-150  6.337e-08   2.390e-08
    15-150  2.051e-06   1.720e-07
    
    Double BB
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT1 [keV]   : 3.85475        (-3.96377      0.64386)
    R1^2/D10^2  : 4.03783        (-3.27703      -3.71517)
    kT2 [keV]   : 7.31100        (-7.71783      80.1133)
    R2^2/D10^2  : 6.13992E-02    (   )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          45.24 using 59 PHA bins.
    #Fit statistic : Chi-Squared =          45.21 using 59 PHA bins.
    # Reduced chi-squared =         0.8225 for     55 degrees of freedom 
    # Reduced chi-squared =         0.8219 for     55 degrees of freedom 
    # Null hypothesis probability =   8.232211e-01
    # Null hypothesis probability =   8.241430e-01
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  1.294e-06   5.828e-07
    25- 50  6.491e-07   3.317e-07
    50-150  6.890e-08   3.944e-08
    15-150  2.012e-06   1.009e-06
    

    Peak spectrum fit

    Power-law model
    Time interval is from  631.000 sec. to  963.055 sec.
     
    Spectral model in power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 3.74418     ( -0.2024   0.211554 )
    Norm@50keV  : 3.40988E-04    ( -5.5546e-05   5.94741e-05 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          60.80 using 59 PHA bins.
    # Reduced chi-squared =          1.067 for     57 degrees of freedom 
    # Null hypothesis probability =   3.407969e-01
     
    Photon flux (15-150 keV)    in 359.1 sec: 0.168805 ( -0.0118596  0.0119026 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 2.25454e-06 ( -1.56164e-07  1.56872e-07 ) ergs/cm2
     
    
    Cutoff power-law model
    Time interval is from  631.000 sec. to  963.055 sec.
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 1.00000     (     )
    Epeak [keV] : 50.0000      (   )
    Norm@50keV  : 1.91498E-03    (     )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =         333.36 using 59 PHA bins.
    # Reduced chi-squared =         5.9528 for     56 degrees of freedom 
    # Null hypothesis probability =   4.388487e-41
     
    Photon flux (15-150 keV)    in 359.1 sec: 0.157545 ( -0.013019  0.012954 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 1.99703e-06 ( -1.6027e-07  1.6473e-07 ) ergs/cm2
     
    
    Band function
    Time interval is from  631.000 sec. to  963.055 sec.
     
    Spectral model in the Band function:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    alpha       : -0.574598   ( -0.447541   0.060614 )
    beta        : -9.99759    ( 9.99759   0.0974385 )
    Epeak [keV] : 11.8383      ( -1.35189 1.21869 )
    Norm@50keV   : 7.16510E-02    ( -0.00478274   3.92177 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          45.39 using 59 PHA bins.
    # Reduced chi-squared =         0.8253 for     55 degrees of freedom 
    # Null hypothesis probability =   8.189388e-01
     
    Photon flux (15-150 keV)    in 359.1 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]    : 4.51040  (-0.290547  0.314754)
    R^2/D10^2   : 2.20606  (-0.67897   0.993525)
    (R is the radius in km and D10 is the distance to the source in units of 10 kpc)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          48.39 using 59 PHA bins.
    # Reduced chi-squared =         0.8490 for     57 degrees of freedom 
    # Null hypothesis probability =   7.844419e-01
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  1.252e-06   1.438e-07
    25- 50  6.286e-07   8.654e-08
    50-150  1.513e-08   6.345e-09
    15-150  1.896e-06   1.576e-07
    
    Thermal bremsstrahlung (OTTB)
     
     
    Spectral model: thermal bremsstrahlung
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT [keV]    : 11.3370       (-1.25826      1.48061)
    Norm        : 4.44548       (-0.978432     1.29076)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          46.26 using 59 PHA bins.
    # Reduced chi-squared =         0.8116 for     57 degrees of freedom 
    # Null hypothesis probability =   8.446269e-01
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  1.320e-06   1.314e-07
    25- 50  6.672e-07   8.044e-08
    50-150  6.337e-08   2.375e-08
    15-150  2.051e-06   1.627e-07
    
    Double BB
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT1 [keV]   : 3.85475        (-3.93485      0.649752)
    R1^2/D10^2  : 4.03783        (-3.27703      -3.71517)
    kT2 [keV]   : 7.31100        (-7.71783      80.1133)
    R2^2/D10^2  : 6.13992E-02    (   )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          45.24 using 59 PHA bins.
    #Fit statistic : Chi-Squared =          45.21 using 59 PHA bins.
    # Reduced chi-squared =         0.8225 for     55 degrees of freedom 
    # Reduced chi-squared =         0.8219 for     55 degrees of freedom 
    # Null hypothesis probability =   8.232211e-01
    # Null hypothesis probability =   8.241430e-01
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  1.294e-06   6.196e-07
    25- 50  6.491e-07   3.296e-07
    50-150  6.890e-08   3.823e-08
    15-150  2.012e-06   9.116e-07
    

    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: 3.74418     ( -0.2024   0.211554 )
    Norm@50keV  : 3.40988E-04    ( -5.5546e-05   5.94741e-05 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          60.80 using 59 PHA bins.
    # Reduced chi-squared =          1.067 for     57 degrees of freedom 
    # Null hypothesis probability =   3.407969e-01
     
    Photon flux (15-150 keV)    in 359.1 sec: 0.168805 ( -0.0118596  0.0119026 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 2.25454e-06 ( -1.56164e-07  1.56872e-07 ) ergs/cm2
     
    
    Cutoff power-law model
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 1.00000     (     )
    Epeak [keV] : 50.0000      (   )
    Norm@50keV  : 1.91498E-03    (     )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =         333.36 using 59 PHA bins.
    # Reduced chi-squared =         5.9528 for     56 degrees of freedom 
    # Null hypothesis probability =   4.388487e-41
     
    Photon flux (15-150 keV)    in 359.1 sec: 0.157545 ( -0.013019  0.012954 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 1.99703e-06 ( -1.6027e-07  1.6473e-07 ) ergs/cm2
     
    
    Band function
     
    Spectral model in the Band function:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    alpha       : -0.574598   ( -0.447541   0.060614 )
    beta        : -9.99759    ( 9.99759   0.0974385 )
    Epeak [keV] : 11.8383      ( -1.35188 1.21869 )
    Norm@50keV   : 7.16510E-02    ( -0.00478274   3.91946 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          45.39 using 59 PHA bins.
    # Reduced chi-squared =         0.8253 for     55 degrees of freedom 
    # Null hypothesis probability =   8.189388e-01
     
    Photon flux (15-150 keV)    in 359.1 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)  = 6.60737e-07
    S(50-100 keV) = 1.9726e-07
    

    T90 vs. Hardness ratio plot

    T90                                   = 1568 sec.
    Hardness ratio (energy fluence ratio) = 0.298545
    

    Color vs. Color plot

    Count Ratio  (25-50 keV) / (15-25 keV) = 0.382895
    Count Ratio (50-100 keV) / (15-25 keV) = 0.0242071
    

    Mask shadow pattern

    IMX = 3.761343683243010E-01, IMY = -1.132768328108184E-01
    

    TIME vs. PHA plot around the trigger time

    TIME vs. DetID plot around the trigger time

    100 us light curve (15-350 keV)

    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:
    276.000000 303.020000
    631.000400 963.055100
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
    244.9901 -15.6533    0.8  32.8   63.8   9.3775  14.7    1.0	Sco X-1                       
    255.9645 -37.8393  299.7  33.8   19.0   0.0159   0.0    1.1	4U 1700-377                   
    256.5078 -36.3537    3.2  32.4   20.2   1.3725   3.6    5.4	GX 349+2                      
    263.0217 -24.6590    2.5  20.2   30.3   1.4084   4.6    5.2	GX 1+4                        
    264.6609 -44.2670    6.4  35.7    3.2   0.7826   1.8   11.5	4U 1735-44                    
    268.3457  -1.5672    4.2  13.4  117.9   0.7334   2.7    7.0	SW J1753.5-0127               
    270.3552 -25.0313    2.0  16.3   13.0   1.5953   5.8    4.8	GX 5-1                        
    270.2484 -25.7347    2.6  17.0   12.1   1.2348   4.5    3.0	GRS 1758-258                  
    273.9864 -14.0802    2.3   5.5   36.7   1.3654   4.9    2.9	GX 17+2                       
    275.9673 -30.3983   11.1  19.9   -7.7   0.2974   1.0    2.9	H1820-303                     
    284.9448 -24.9576    7.4  15.6  -36.4   0.4490   1.6    5.4	HT1900.1-2455                 
    288.7690  10.9549    0.6  23.9 -167.8   6.1070  18.6    1.8	GRS 1915+105                  
    299.5704  35.1939    2.2  50.0 -171.0   4.0496   5.3    1.1	Cyg X-1                       
    308.1437  40.8375    5.9  58.3 -167.5   3.3534   1.9    7.1	Cyg X-3                       
    262.9984 -33.8447    2.7  27.2   15.1   1.3965   4.3    0.8	GX 354-0                      
    266.1402 -28.7549    0.5  21.4   16.8   6.2215  23.0 ------	UNKNOWN                       
    265.0111 -37.6372    2.8  29.6    8.0   1.4108   4.1 ------	UNKNOWN                       
    

    Post-slew image of 15-350 keV band

    Time interval of the image:
     
    
    Plot creation:
    Tue Mar 18 23:08:57 EDT 2014