batgrbproduct analysis for trigger=1113743

batgrbproduct Analysis for Trigger=1113743

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.48
    Process Start Time (local time): Thu Jun 30 13:21:32 EDT 2022
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/prebascript/trigger1113743/GCN5_download_cron
======================================================================

  Trigger: 01113743      Segment: 000

  BAT Trigger Time: 678205648   [s; MET]
      Trigger Stop: 678205712   [s; MET]
               UTC: 2022-06-29T14:26:58.593700    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 103.786471289097   Dec: -1.49292885263794  [deg; J2000]

     Catalogged Source?: YES
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    14.86
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    14.86

  Flight Position:   [ source = BAT ]
    RA: 103.786471289097   Dec: -1.49292885263794  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 103.781796917968   Dec: -1.50829702627768  [deg; J2000]  
        { 06h 55m 07.6s , -01d 30' 29.9" }
         +/- 2.61212375190842 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.48338028771031 [arcmin] (formal 1-sigma fit error)
    SNR: 7.71636967128721
 
  Angular difference between Flight and Ground position is 0.963772 arcmin
 
  Partial Coding Fraction: 0.59375    [ including projection effects ]

  Duration
     T90: 113.81199991703 +/- 19.3677452945808
        Measured from: 5.47200012207031
                   to: 119.284000039101     [s; relative to TRIGTIME]
     T50: 58.2400000095367 +/- 16.1043627242886
        Measured from: 36.4120000600815
                   to: 94.6520000696182     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 78.4759999513626     
                   to: 79.4759999513626     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -1.55200004577637     
                   to: 131.396000027657     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     2.138491   1.518691   0.183877  -0.087873
           0.092145   0.094942   0.085242   0.084405 [error]
 Peak      0.032606   0.011592   0.020630   0.018879
           0.007983   0.007985   0.007158   0.006979 [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 7.14e-07 5.70e-07 3.07e-07 2.41e-07 1.70e-06 1.83e-06   erg/cm2
              Error 6.15e-08 5.09e-08 5.67e-08 8.01e-08 1.45e-07 1.83e-07   erg/cm2
Peak flux Power-law 2.07e-01 1.85e-01 1.14e-01 1.07e-01 5.51e-01 6.13e-01   ph/cm2/s
              Error 1.66e-01 6.43e-02 8.88e-02 1.49e-01 1.88e-01 2.18e-01   ph/cm2/s
 
Fluence   Cutoff-PL 6.70e-07 6.50e-07 4.20e-08 2.40e-11 1.36e-06 1.36e-06   erg/cm2
              Error 7.06e-08 6.94e-08 3.30e-08 2.08e-10 1.14e-07 1.14e-07   erg/cm2
Peak flux Cutoff-PL 2.12e-01 1.86e-01 1.11e-01 9.91e-02 5.52e-01 6.08e-01   ph/cm2/s
              Error 1.05e-01 6.31e-02 8.88e-02 1.57e-01 1.87e-01 2.18e-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    2.894    0.170    -      -           1.12e-03 1.55e-04  107.820 57
CPL  -2.117    2.038      23.4    2.0      3.88e+00 1.56e+02   66.930 56
 
The chi2 of BB fit is 67.31 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    1.697    0.805    -      -           4.16e-03 1.75e-03   53.840 57
CPL   1.701    0.813    10000.0   -0.0      4.16e-03 0.00e+00   53.850 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  132.948   -1.552  131.396
T90   113.812    5.472  119.284
T50    58.240   36.412   94.652
Peak    1.000   78.476   79.476
  • Click here for the BAT GCN circular template
  • Estimated redshift from machine learning (Ukwatta et al. 2016) - may take a few minutes to calcaulte

    Image

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

    #   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
      103.7818  -1.5083 0.0248   25.4  -72.3       1.4411     7.7  TRIG_01113743       
    ------------------------------------------
     
    Foreground time interval of the image:
     -1.552  11.130 (delta_t =  12.682 [sec])
     12.000  93.301 (delta_t =  81.301 [sec])
    Background time interval of the image:
    -239.000 -56.360 (delta_t = 182.640 [sec])
    -55.000  -1.552 (delta_t =  53.448 [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

    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)

    Spectra

    Notes:

    Time averaged spectrum fit using the pre-slew DRM

    Power-law model
    Multiple GTIs in the spectrum
    tstart tstop
    -1.552000 11.130000
    12.000000 131.396000
     
    Spectral model in power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 2.89389     ( -0.165801   0.174615 )
    Norm@50keV  : 1.12199E-03    ( -0.00015269   0.000156393 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =         107.82 using 59 PHA bins.
    # Reduced chi-squared =         1.8916 for     57 degrees of freedom 
    # Null hypothesis probability =   5.550205e-05
     
    Photon flux (15-150 keV)    in 132.1 sec: 0.285957 ( -0.0206841  0.0206858 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 1.6994e-06 ( -1.43618e-07  1.47136e-07 ) ergs/cm2
     
    
    Cutoff power-law model
    Multiple GTIs in the spectrum
    tstart tstop
    -1.552000 11.130000
    12.000000 131.396000
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: -2.11709     ( -2.63667   1.43841 )
    Epeak [keV] : 23.3687      ( -2.2754 1.75858 )
    Norm@50keV  : 3.88453    ( -7.70023   303.327 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          66.93 using 59 PHA bins.
    # Reduced chi-squared =          1.195 for     56 degrees of freedom 
    # Null hypothesis probability =   1.503839e-01
     
    Photon flux (15-150 keV)    in 132.1 sec: 0.261385 ( -0.021005  0.021047 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 1.36186e-06 ( -1.11642e-07  1.1605e-07 ) ergs/cm2
     
    
    Band function
    Multiple GTIs in the spectrum
    tstart tstop
    -1.552000 11.130000
    12.000000 131.396000
     
    Spectral model in the Band function:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    alpha       : 2.49437   ( -1.57033   -2.49255 )
    beta        : -5.27746    ( 5.37387   1.3011 )
    Epeak [keV] : 23.7045      ( -1.47993 1.42203 )
    Norm@50keV   : 7.11411    ( -7.32959   207.711 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          65.78 using 59 PHA bins.
    # Reduced chi-squared =          1.196 for     55 degrees of freedom 
    # Null hypothesis probability =   1.514509e-01
     
    Photon flux (15-150 keV)    in 132.1 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]    : 5.88724  (-0.365402  0.390745)
    R^2/D10^2   : 1.15100  (-0.295381   0.40024)
    (R is the radius in km and D10 is the distance to the source in units of 10 kpc)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          67.31 using 59 PHA bins.
    # Reduced chi-squared =          1.181 for     57 degrees of freedom 
    # Null hypothesis probability =   1.649782e-01
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  6.811e-07   7.166e-08
    25- 50  6.515e-07   7.279e-08
    50-150  5.516e-08   1.832e-08
    15-150  1.388e-06   1.109e-07
    
    Thermal bremsstrahlung (OTTB)
    XSPEC12>exit
     XSPEC: quit
     
     
    Spectral model: thermal bremsstrahlung
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT [keV]    : 19.6040       (-2.53982      3.07187)
    Norm        : 3.56243       (-0.605237     0.746228)
    ------------------------------------------------------------
     Reduced chi-squared = 
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  7.175e-07   6.697e-08
    25- 50  6.186e-07   6.433e-08
    50-150  1.791e-07   6.063e-08
    15-150  1.515e-06   1.420e-07
    
    Double BB
    XSPEC12>exit
     XSPEC: quit
     
     
    Spectral model: bbodyrad<1> + bbodyrad<2>
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT1 [keV]   : 5.78450        (-0.365439      0.390706)
    R1^2/D10^2  : 1.22803        (-0.295347      0.400273)
    kT2 [keV]   : 29.5625        (-28.2824      -28.2824)
    R2^2/D10^2  : 1.49424E-04    (-0.000152605   1.47874)
    ------------------------------------------------------------
     Reduced chi-squared = 
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  0.000e+00   0.000e+00
    25- 50  0.000e+00   0.000e+00
    50-150  0.000e+00   0.000e+00
    15-150  0.000e+00   0.000e+00
    

    Peak spectrum fit

    Power-law model
    Time interval is from   78.476 sec. to   79.476 sec.
     
    Spectral model in power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 1.69711     ( -0.761244   0.848767 )
    Norm@50keV  : 4.15670E-03    ( -0.00188395   0.00161846 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          53.84 using 59 PHA bins.
    # Reduced chi-squared =         0.9446 for     57 degrees of freedom 
    # Null hypothesis probability =   5.942048e-01
     
    Photon flux (15-150 keV)    in 1 sec: 0.551499 ( -0.187981  0.187846 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 3.84893e-08 ( -1.64262e-08  1.74528e-08 ) ergs/cm2
     
    
    Cutoff power-law model
    Time interval is from   78.476 sec. to   79.476 sec.
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 1.70086     ( -0.81766   0.808432 )
    Epeak [keV] : 1.00000E+04      ( -9999.99 -10000 )
    Norm@50keV  : 4.15586E-03    (     )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          53.85 using 59 PHA bins.
    # Reduced chi-squared =         0.9616 for     56 degrees of freedom 
    # Null hypothesis probability =   5.567711e-01
     
    Photon flux (15-150 keV)    in 1 sec: 0.551932 ( -0.187516  0.187369 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 3.78514e-08 ( -1.58259e-08  1.81133e-08 ) ergs/cm2
     
    
    Band function
    Time interval is from   78.476 sec. to   79.476 sec.
     
    Spectral model in the Band function:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    alpha       : -1.32603   ( 1.32471   1.32471 )
    beta        : -1.69621    ( 1.69738   0.761563 )
    Epeak [keV] : 24.4395      ( -25.4374 -25.4374 )
    Norm@50keV   : 9.79645E-03    ( -0.00974462   2443.3 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          53.84 using 59 PHA bins.
    # Reduced chi-squared =         0.9790 for     55 degrees of freedom 
    # Null hypothesis probability =   5.188249e-01
     
    Photon flux (15-150 keV)    in 1 sec:  (    ) ph/cm2/s
    Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
     
    
    Single BB
     XSPEC: quit
     
     
    Spectral model blackbody:
    ------------------------------------------------------------
    Parameters  : value    Lower 90%  Upper 90%
    kT [keV]    : 14.0399  (-9.6403  23.836)
    R^2/D10^2   : 6.82104E-02  (-0.0663725   10.7037)
    (R is the radius in km and D10 is the distance to the source in units of 10 kpc)
    ------------------------------------------------------------
     Reduced chi-squared = 
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  7.217e-09   4.611e-09
    25- 50  9.426e-09   6.345e-09
    50-150  1.430e-09   1.386e-09
    15-150  1.807e-08   1.122e-08
    
    Thermal bremsstrahlung (OTTB)
    XSPEC12>exit
     XSPEC: quit
     
     
    Spectral model: thermal bremsstrahlung
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT [keV]    : 198.849       (-165.21      -198.966)
    Norm        : 2.18815       (-0.754349     1.71869)
    ------------------------------------------------------------
     Reduced chi-squared = 
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  5.450e-09   3.540e-09
    25- 50  1.048e-08   6.685e-09
    50-150  2.297e-08   1.436e-08
    15-150  3.890e-08   2.461e-08
    
    Double BB
    XSPEC12>exit
     XSPEC: quit
     
     
    Spectral model: bbodyrad<1> + bbodyrad<2>
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT1 [keV]   : 4.66123        (-2.04702      2.51807)
    R1^2/D10^2  : 4.22889        (-3.85139      70.1183)
    kT2 [keV]   : 42.4713        (-26.6151      -42.6848)
    R2^2/D10^2  : 1.91938E-03    (-0.00176904   0.0113501)
    ------------------------------------------------------------
     Reduced chi-squared = 
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  8.129e-09   5.085e-09
    25- 50  7.181e-09   3.916e-09
    50-150  3.059e-08   1.917e-08
    15-150  4.590e-08   2.332e-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: 2.92226     ( -0.186503   0.198032 )
    Norm@50keV  : 1.11108E-03    ( -0.000173373   0.000178851 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =         101.61 using 59 PHA bins.
    # Reduced chi-squared =         1.7827 for     57 degrees of freedom 
    # Null hypothesis probability =   2.566065e-04
     
    Photon flux (15-150 keV)    in 93.98 sec: 0.288927 ( -0.0230937  0.0230942 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 1.21183e-06 ( -1.15278e-07  1.18872e-07 ) ergs/cm2
     
    
    Cutoff power-law model
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: -2.97795     ( -3.3057   1.54301 )
    Epeak [keV] : 23.1908      ( -2.2249 2.15839 )
    Norm@50keV  : 19.3146    ( -19.029   1192.95 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          69.38 using 59 PHA bins.
    # Reduced chi-squared =          1.239 for     56 degrees of freedom 
    # Null hypothesis probability =   1.079963e-01
     
    Photon flux (15-150 keV)    in 93.98 sec: 0.265919 ( -0.023236  0.023249 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 9.67985e-07 ( -8.73591e-08  9.1311e-08 ) ergs/cm2
     
    
    Band function
     
    Spectral model in the Band function:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    alpha       : 3.27991   ( -3.04876   -3.87513 )
    beta        : -5.29256    ( 5.45778   1.48087 )
    Epeak [keV] : 23.2384      ( -1.59907 1.36635 )
    Norm@50keV   : 32.6975    ( -32.707   219.386 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          68.17 using 59 PHA bins.
    # Reduced chi-squared =          1.240 for     55 degrees of freedom 
    # Null hypothesis probability =   1.093030e-01
     
    Photon flux (15-150 keV)    in 93.98 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)  = 5.70e-07
    S(50-100 keV) = 3.07e-07
    

    T90 vs. Hardness ratio plot

    T90                                   = 113.81199991703 sec.
    Hardness ratio (energy fluence ratio) = 0.538596
    

    Color vs. Color plot

    Count Ratio  (25-50 keV) / (15-25 keV) = 0.710169
    Count Ratio (50-100 keV) / (15-25 keV) = 0.0859845
    

    Mask shadow pattern

    IMX = 1.441883822019237E-01, IMY = 4.515049016723787E-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:
    -239.000000 -56.360000
    -55.000000 -1.552000
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
    135.4873 -40.5473    8.1  37.9   28.5  -1.1182  -1.4    1.9	Vela X-1                      
     85.5310 -57.2536    2.4  32.8   92.1   5.0598   4.9 ------	UNKNOWN                       
    155.0542 -40.0906    2.7  52.7   26.4   7.5270   4.3 ------	UNKNOWN                       
    130.7863 -16.9498    4.9  35.3  -11.9   1.3668   2.4 ------	UNKNOWN                       
    146.7006 -11.0274    2.5  51.9  -11.7   4.4989   4.5 ------	UNKNOWN                       
    103.7679  -1.4925    2.0  25.4  -72.3   3.3851   5.7 ------	UNKNOWN                       
    

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

    Time interval of the image:
    -1.552000 11.130000
    12.000000 93.300600
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
    135.5190 -40.4205    6.0  37.9   28.3   0.4516   1.9    8.1	Vela X-1                      
    102.6541 -28.8330    2.6   8.8   21.9   0.5982   4.4 ------	UNKNOWN                       
    121.6017 -21.6033    2.3  25.7   -7.9   0.7550   4.9 ------	UNKNOWN                       
    103.7818  -1.5083    1.5  25.4  -72.3   1.4415   7.7 ------	UNKNOWN                       
     65.0193   3.5312    3.0  39.9 -144.7   0.8958   3.8 ------	UNKNOWN                       
    

    Post-slew image of 15-350 keV band

    Time interval of the image:
    241.100600 420.480000
    421.000000 603.054700
    661.000000 823.160000
    824.000000 869.500600
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
    170.1697 -60.7453    5.8  34.8 -157.6   1.9806   2.0    8.5	Cen X-3                       
    186.3707 -62.7662  327.8  31.8 -171.0   0.0310   0.0    7.9	GX 301-2                      
    184.8450 -34.0426    2.8  13.8 -105.2   2.8907   4.2 ------	UNKNOWN                       
    181.0977 -28.7633    3.3  17.7  -87.4   2.8248   3.5 ------	UNKNOWN                       
    160.8314 -54.2023    2.3  35.9 -143.5   5.0438   5.1 ------	UNKNOWN                       
    156.2203 -22.6392    2.8  40.8  -91.8  14.1713   4.1 ------	UNKNOWN                       
    140.0543 -46.1454    2.5  48.1 -129.2  14.9727   4.7 ------	UNKNOWN                       
    
    Plot creation:
    Thu Jun 30 13:28:25 EDT 2022