batgrbproduct analysis for trigger=846868

batgrbproduct Analysis for Trigger=846868

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Mon Aug  6 18:32:54 EDT 2018
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger846868
======================================================================

  Trigger: 00846868      Segment: 000

  BAT Trigger Time: 552826341.504   [s; MET]
      Trigger Stop: 552826349.696   [s; MET]
               UTC: 2018-07-09T10:52:00.268380    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 38.1190695176549   Dec: 60.3717433056486  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9.13
     Image Trigger?:     NO
     Rate S/N Ratio:     15.556349186104  [ if not an image trigger ]
     Image S/N Ratio:    9.13

  Flight Position:   [ source = BAT ]
    RA: 38.1190695176549   Dec: 60.3717433056486  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 38.0855238153814   Dec: 60.333308454253  [deg; J2000]  
        { 02h 32m 20.5s , +60d 19' 59.9" }
         +/- 1.55996534289738 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.668667851786314 [arcmin] (formal 1-sigma fit error)
    SNR: 16.1153551191521
 
  Angular difference between Flight and Ground position is 2.511838 arcmin
 
  Partial Coding Fraction: 0.8125    [ including projection effects ]

  Duration
     T90: 194.807999968529 +/- 31.2153429769643
        Measured from: 2.74800002574921
                   to: 197.555999994278     [s; relative to TRIGTIME]
     T50: 98.3200000524521 +/- 67.6398104335087
        Measured from: 10.3799999952316
                   to: 108.700000047684     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 8.73199999332428     
                   to: 9.73199999332428     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0.596000075340271     
                   to: 223.72000002861     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.562713   0.695017   0.666130   0.113794
           0.090902   0.093747   0.082761   0.075497 [error]
 Peak      0.018102   0.024548   0.028868   0.011033
           0.007027   0.006986   0.006393   0.005653 [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 1.49e-07 3.06e-07 4.89e-07 1.74e-06 1.36e-06 2.68e-06   erg/cm2
              Error 3.54e-08 4.27e-08 8.20e-08 6.63e-07 2.02e-07 7.17e-07   erg/cm2
Peak flux Power-law 1.32e-01 1.77e-01 1.76e-01 3.15e-01 5.88e-01 8.00e-01   ph/cm2/s
              Error 7.49e-02 6.07e-02 5.08e-02 2.12e-01 1.61e-01 2.36e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.49e-07 3.06e-07 4.89e-07 1.91e-06 1.36e-06 2.74e-06   erg/cm2
              Error -------- -------- -------- -------- 2.01e-07 6.98e-07   erg/cm2
Peak flux Cutoff-PL 1.28e-01 1.78e-01 1.78e-01 2.88e-01 5.85e-01 7.72e-01   ph/cm2/s
              Error 8.55e-02 6.34e-02 5.75e-02 2.45e-01 1.65e-01 2.82e-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    1.323    0.239    -      -           6.19e-04 8.01e-05   53.130 57
CPL   1.319    0.272    9999.4    0.0      6.21e-04 5.11e-04   53.140 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.011    0.506    -      -           5.10e-03 1.37e-03   63.440 57
CPL   0.817    0.572     362.2    0.0      6.17e-03 1.40e-02   63.450 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: 15.296000 sec.
T50 in the 50-300 keV band: 7.488000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  223.124    0.596  223.720
T90   194.808    2.748  197.556
T50    98.320   10.380  108.700
Peak    1.000    8.732    9.732
  • Click here for the BAT GCN circular template
  • Special notes of this burst
  • Estimated redshift from machine learning (Ukwatta et al. 2016) - may take a few minute to calcaulte

    Image

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

    #   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
       38.0855    60.3333   0.0119    20.0126  -117.5140         1.4856785     16.115 TRIG_00846868                 
     
    Foreground time interval of the image:
      0.596  49.597 (delta_t =  49.001 [sec])
    Background time interval of the image:
    -239.504   0.596 (delta_t = 240.100 [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 8.192000
    

    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 8.192000
    

    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 8.192000
    

    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    0.596 sec. to  223.720 sec.
     
    Spectral model in power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 1.32301     ( -0.239965   0.237634 )
    Norm@50keV  : 6.18759E-04    ( -8.0287e-05   7.99674e-05 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          53.13 using 59 PHA bins.
    # Reduced chi-squared =         0.9320 for     57 degrees of freedom 
    # Null hypothesis probability =   6.211805e-01
     
    Photon flux (15-150 keV)    in 223.1 sec: 7.41425E-02 ( -0.0096543  0.0096772 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 1.35681e-06 ( -2.00141e-07  2.02919e-07 ) ergs/cm2
     
    
    Cutoff power-law model
    Time interval is from    0.596 sec. to  223.720 sec.
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 1.31865     ( -0.30439   0.239747 )
    Epeak [keV] : 9999.35      ( -9999.36 -9999.36 )
    Norm@50keV  : 6.21270E-04    ( -0.00054213   0.000480762 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          53.14 using 59 PHA bins.
    # Reduced chi-squared =         0.9489 for     56 degrees of freedom 
    # Null hypothesis probability =   5.839117e-01
     
    Photon flux (15-150 keV)    in 223.1 sec: 7.41348E-02 ( -0.0096658  0.0096687 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 1.35622e-06 ( -2.00001e-07  2.02866e-07 ) ergs/cm2
     
    
    Band function
    Time interval is from    0.596 sec. to  223.720 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]    : 18.1213  (-3.92249  5.02304)
    R^2/D10^2   : 4.36670E-03  (-0.00431937   0.00549991)
    (R is the radius in km and D10 is the distance to the source in units of 10 kpc)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          77.97 using 59 PHA bins.
    # Reduced chi-squared =          1.368 for     57 degrees of freedom 
    # Null hypothesis probability =   3.396746e-02
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  6.391e-08   1.731e-08
    25- 50  2.971e-07   7.146e-08
    50-150  7.093e-07   1.848e-07
    15-150  1.070e-06   2.368e-07
    
    Thermal bremsstrahlung (OTTB)
     
     
    Spectral model: thermal bremsstrahlung
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT [keV]    : 200.000       (-53.9248      -200)
    Norm        : 0.304018       (-0.0393092     0.0393092)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          56.76 using 59 PHA bins.
    # Reduced chi-squared =         0.9958 for     57 degrees of freedom 
    # Null hypothesis probability =   4.840538e-01
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  1.689e-07   9.554e-08
    25- 50  3.249e-07   1.803e-07
    50-150  7.126e-07   3.888e-07
    15-150  1.206e-06   6.645e-07
    
    Double BB
     
     
    Spectral model: bbodyrad<1> + bbodyrad<2>
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT1 [keV]   : 6.63599        (-1.51491      1.91236)
    R1^2/D10^2  : 0.101076        (-0.0609934      0.167519)
    kT2 [keV]   : 36.8836        (-10.8337      28.643)
    R2^2/D10^2  : 4.00418E-04    (-0.000305151   0.000742649)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          48.64 using 59 PHA bins.
    # Reduced chi-squared =         0.8843 for     55 degrees of freedom 
    # Null hypothesis probability =   7.148512e-01
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  1.670e-07   8.991e-08
    25- 50  2.958e-07   1.350e-07
    50-150  9.768e-07   5.337e-07
    15-150  1.440e-06   6.763e-07
    

    Peak spectrum fit

    Power-law model
    Time interval is from    8.732 sec. to    9.732 sec.
     
    Spectral model in power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 1.01119     ( -0.525557   0.48564 )
    Norm@50keV  : 5.10118E-03    ( -0.00137742   0.00135702 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          63.44 using 59 PHA bins.
    # Reduced chi-squared =          1.113 for     57 degrees of freedom 
    # Null hypothesis probability =   2.597716e-01
     
    Photon flux (15-150 keV)    in 1 sec: 0.587655 ( -0.160047  0.161359 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 5.49503e-08 ( -1.56958e-08  1.5965e-08 ) ergs/cm2
     
    
    Cutoff power-law model
    Time interval is from    8.732 sec. to    9.732 sec.
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 0.817251     ( -1.97513   -0.830448 )
    Epeak [keV] : 362.169      ( -407.436 -407.436 )
    Norm@50keV  : 6.17468E-03    ( -0.00214252   0.0258468 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          63.45 using 59 PHA bins.
    # Reduced chi-squared =          1.133 for     56 degrees of freedom 
    # Null hypothesis probability =   2.305513e-01
     
    Photon flux (15-150 keV)    in 1 sec: 0.584936 ( -0.166451  0.163565 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 5.47344e-08 ( -1.62398e-08  1.6096e-08 ) ergs/cm2
     
    
    Band function
    Time interval is from    8.732 sec. to    9.732 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]    : 26.0788  (-8.55768  15.0719)
    R^2/D10^2   : 1.22663E-02  (-0.0122532   0.0293896)
    (R is the radius in km and D10 is the distance to the source in units of 10 kpc)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          66.38 using 59 PHA bins.
    # Reduced chi-squared =          1.165 for     57 degrees of freedom 
    # Null hypothesis probability =   1.850125e-01
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  1.417e-09   8.940e-10
    25- 50  8.207e-09   4.634e-09
    50-150  4.109e-08   2.587e-08
    15-150  5.071e-08   3.043e-08
    
    Thermal bremsstrahlung (OTTB)
     
     
    Spectral model: thermal bremsstrahlung
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT [keV]    : 200.000       (-88.4306      -200)
    Norm        : 2.41528       (-0.663531     0.663531)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          66.92 using 59 PHA bins.
    # Reduced chi-squared =          1.174 for     57 degrees of freedom 
    # Null hypothesis probability =   1.730677e-01
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  6.014e-09   3.682e-09
    25- 50  1.157e-08   7.175e-09
    50-150  2.537e-08   1.539e-08
    15-150  4.296e-08   2.548e-08
    
    Double BB
     
     
    Spectral model: bbodyrad<1> + bbodyrad<2>
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT1 [keV]   : 6.40259        (-2.79397      6.09696)
    R1^2/D10^2  : 0.691637        (-0.684431      5.24817)
    kT2 [keV]   : 36.3309        (-13.4489      55.8152)
    R2^2/D10^2  : 4.13838E-03    (-0.00385798   0.00813379)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          61.64 using 59 PHA bins.
    # Reduced chi-squared =          1.121 for     55 degrees of freedom 
    # Null hypothesis probability =   2.507608e-01
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  4.866e-09   3.405e-09
    25- 50  9.700e-09   5.280e-09
    50-150  4.270e-08   2.466e-08
    15-150  5.727e-08   3.201e-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: 1.18360     ( -0.178058   0.175331 )
    Norm@50keV  : 2.02628E-03    ( -0.000191228   0.000191187 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          53.29 using 59 PHA bins.
    # Reduced chi-squared =         0.9349 for     57 degrees of freedom 
    # Null hypothesis probability =   6.151411e-01
     
    Photon flux (15-150 keV)    in 49 sec: 0.237308 ( -0.0231735  0.0232777 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 1.01205e-06 ( -1.0667e-07  1.07448e-07 ) ergs/cm2
     
    
    Cutoff power-law model
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 1.17907     ( -0.490086   0.2226 )
    Epeak [keV] : 1.00000E+04      ( -10000 -10000 )
    Norm@50keV  : 2.03611E-03    (     )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          53.30 using 59 PHA bins.
    # Reduced chi-squared =         0.9517 for     56 degrees of freedom 
    # Null hypothesis probability =   5.778099e-01
     
    Photon flux (15-150 keV)    in 49 sec: 0.237211 ( -0.022969  0.023252 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 1.00999e-06 ( -1.051e-07  1.08672e-07 ) 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)  = 3.06e-07
    S(50-100 keV) = 4.89e-07
    

    T90 vs. Hardness ratio plot

    T90                                   = 194.807999968529 sec.
    Hardness ratio (energy fluence ratio) = 1.59804
    

    Color vs. Color plot

    Count Ratio  (25-50 keV) / (15-25 keV) = 1.23512
    Count Ratio (50-100 keV) / (15-25 keV) = 1.18378
    

    Mask shadow pattern

    IMX = -1.682567517699103E-01, IMY = 3.230260812799193E-01
    

    TIME vs. PHA plot around the trigger time

    Blue+Cyan dotted lines: Time interval of the scaled map
    From 0.000000 to 8.192000
    

    TIME vs. DetID plot around the trigger time

    Blue+Cyan dotted lines: Time interval of the scaled map
    From 0.000000 to 8.192000
    

    100 us light curve (15-350 keV)

    Blue+Cyan dotted lines: Time interval of the scaled map
    From 0.000000 to 8.192000
    

    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:
    -239.504000 0.596000
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
    307.9621  40.9557    6.4  46.6  134.5   2.0582   1.8    6.7	Cyg X-3                       
    326.1276  38.5227    7.8  35.5  121.1   0.7779   1.5   12.2	Cyg X-2                       
     43.5284  -1.3199    3.4  54.3  -11.6   2.2636   3.4 ------	UNKNOWN                       
     40.9030  61.4447    1.5  21.8 -118.0   2.0672   7.7 ------	UNKNOWN                       
    108.4153  71.7943    4.4  48.0 -129.2   3.1107   2.6 ------	UNKNOWN                       
    124.8305  74.6978    2.7  50.9 -135.4   6.5034   4.3 ------	UNKNOWN                       
    

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

    Time interval of the image:
    0.596000 49.596610
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
    308.0649  40.8255   10.4  46.6  134.3  -0.4669  -1.1    7.9	Cyg X-3                       
    326.1156  38.1769    5.5  35.7  120.5   0.4072   2.1    9.1	Cyg X-2                       
     38.0855  60.3333    0.7  20.0 -117.5   1.4859  16.1 ------	UNKNOWN                       
    

    Post-slew image of 15-350 keV band

    Time interval of the image:
    93.596600 962.592600
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
      5.2484  22.5557    3.2  44.2   40.9   5.8738   3.6 ------	UNKNOWN                       
     13.1586  11.0476    3.1  52.6   26.3  11.4157   3.8 ------	UNKNOWN                       
     24.2261  49.3771    3.2  13.5   36.8   2.2738   3.7 ------	UNKNOWN                       
     40.8688  61.4354    0.8   1.7 -134.4   9.2940  13.6 ------	UNKNOWN                       
    
    Plot creation:
    Mon Aug  6 22:32:22 EDT 2018