batgrbproduct analysis for trigger=889785

batgrbproduct Analysis for Trigger=889785

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Sun Mar 17 22:24:36 EDT 2019
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger889785
======================================================================

  Trigger: 00889785      Segment: 000

  BAT Trigger Time: 572324397.12   [s; MET]
      Trigger Stop: 572324398.144   [s; MET]
               UTC: 2019-02-20T02:59:34.673220    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 330.142349349267   Dec: -76.6910121240364  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9.05
     Image Trigger?:     NO
     Rate S/N Ratio:     14.560219778561  [ if not an image trigger ]
     Image S/N Ratio:    9.05

  Flight Position:   [ source = BAT ]
    RA: 330.142349349267   Dec: -76.6910121240364  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 330.135316423617   Dec: -76.6701948837738  [deg; J2000]  
        { 22h 00m 32.5s , -76d 40' 12.7" }
         +/- 1.27494371989389 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.465767168414482 [arcmin] (formal 1-sigma fit error)
    SNR: 21.4989342426043
 
  Angular difference between Flight and Ground position is 1.252812 arcmin
 
  Partial Coding Fraction: 0.46875    [ including projection effects ]

  Duration
     T90: 10 +/- 2
        Measured from: -0.120000004768372
                   to: 9.87999999523163     [s; relative to TRIGTIME]
     T50: 4 +/- 1
        Measured from: 0.879999995231628
                   to: 4.87999999523163     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 1.87999999523163     
                   to: 2.87999999523163     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.120000004768372     
                   to: 11.8799999952316     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.583769   0.747544   0.350657   0.044812
           0.040959   0.043984   0.037356   0.032845 [error]
 Peak      0.088594   0.144092   0.059181   0.008910
           0.011844   0.014862   0.012213   0.009664 [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 2.24e-07 2.99e-07 2.93e-07 5.14e-07 9.85e-07 1.33e-06   erg/cm2
              Error 2.37e-08 2.21e-08 3.61e-08 1.24e-07 8.43e-08 1.64e-07   erg/cm2
Peak flux Power-law 1.06e+00 8.57e-01 4.69e-01 3.76e-01 2.55e+00 2.76e+00   ph/cm2/s
              Error 1.96e-01 1.17e-01 9.57e-02 1.41e-01 3.49e-01 3.83e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.00e-07 3.43e-07 2.71e-07 8.70e-08 8.82e-07 9.02e-07   erg/cm2
              Error 2.73e-08 3.29e-08 4.75e-08 9.08e-08 9.51e-08 1.31e-07   erg/cm2
Peak flux Cutoff-PL 8.67e-01 1.13e+00 4.45e-01 3.48e-02 2.47e+00 2.47e+00   ph/cm2/s
              Error 2.33e-01 2.03e-01 1.45e-01 6.94e-02 3.52e-01 3.56e-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    2.031    0.135    -      -           8.89e-03 8.04e-04   90.690 57
CPL   0.775    0.785      40.1    6.6      4.73e-02 6.69e-02   80.300 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.870    0.219    -      -           1.80e-02 2.90e-03   79.610 57
CPL  -0.501    1.844      43.2    8.4      4.38e-01 5.13e+00   69.490 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: 3.840000 sec.
T50 in the 50-300 keV band: 1.792000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   12.000   -0.120   11.880
T90    10.000   -0.120    9.880
T50     4.000    0.880    4.880
Peak    1.000    1.880    2.880
  • 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
      330.1353   -76.6702   0.0090    38.1911  -143.3517         1.7453922     21.499 TRIG_00889785                 
     
    Foreground time interval of the image:
     -0.120  10.381 (delta_t =  10.501 [sec])
    Background time interval of the image:
    -239.120  -0.120 (delta_t = 239.000 [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)

    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   -0.120 sec. to   11.880 sec.
     
    Spectral model in power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 2.03061     ( -0.132559   0.137789 )
    Norm@50keV  : 8.88649E-03    ( -0.000809824   0.000798624 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          90.69 using 59 PHA bins.
    # Reduced chi-squared =          1.591 for     57 degrees of freedom 
    # Null hypothesis probability =   3.007259e-03
     
    Photon flux (15-150 keV)    in 12 sec: 1.35219 ( -0.10071  0.10077 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 9.85374e-07 ( -8.3738e-08  8.47922e-08 ) ergs/cm2
     
    
    Cutoff power-law model
    Time interval is from   -0.120 sec. to   11.880 sec.
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 0.775417     ( -0.861485   0.70867 )
    Epeak [keV] : 40.0953      ( -6.28147 7.01425 )
    Norm@50keV  : 4.73217E-02    ( -0.028753   0.105022 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          80.30 using 59 PHA bins.
    # Reduced chi-squared =          1.434 for     56 degrees of freedom 
    # Null hypothesis probability =   1.829973e-02
     
    Photon flux (15-150 keV)    in 12 sec: 1.29015 ( -0.10546  0.10589 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 8.81681e-07 ( -9.23279e-08  9.79474e-08 ) ergs/cm2
     
    
    Band function
    Time interval is from   -0.120 sec. to   11.880 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]    : 9.86359  (-0.749347  0.814558)
    R^2/D10^2   : 0.673690  (-0.179717   0.243215)
    (R is the radius in km and D10 is the distance to the source in units of 10 kpc)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          95.67 using 59 PHA bins.
    # Reduced chi-squared =          1.678 for     57 degrees of freedom 
    # Null hypothesis probability =   1.018643e-03
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  1.594e-07   1.992e-08
    25- 50  3.887e-07   3.096e-08
    50-150  1.949e-07   3.996e-08
    15-150  7.430e-07   6.564e-08
    
    Thermal bremsstrahlung (OTTB)
     
     
    Spectral model: thermal bremsstrahlung
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT [keV]    : 61.7472       (-11.9676      16.1501)
    Norm        : 7.02762       (-0.834714     0.904003)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          81.73 using 59 PHA bins.
    # Reduced chi-squared =          1.434 for     57 degrees of freedom 
    # Null hypothesis probability =   1.753675e-02
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  2.129e-07   2.178e-08
    25- 50  3.269e-07   2.538e-08
    50-150  3.808e-07   7.224e-08
    15-150  9.206e-07   8.940e-08
    
    Double BB
     
     
    Spectral model: bbodyrad<1> + bbodyrad<2>
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT1 [keV]   : 7.76681        (-1.91436      1.32059)
    R1^2/D10^2  : 1.36878        (-0.492257      1.53886)
    kT2 [keV]   : 24.5629        (-10.595      44.1263)
    R2^2/D10^2  : 9.27085E-03    (-0.00809884   0.0878255)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          78.48 using 59 PHA bins.
    # Reduced chi-squared =          1.427 for     55 degrees of freedom 
    # Null hypothesis probability =   2.050186e-02
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  1.869e-07   3.942e-08
    25- 50  3.571e-07   9.054e-08
    50-150  3.659e-07   1.695e-07
    15-150  9.100e-07   2.824e-07
    

    Peak spectrum fit

    Power-law model
    Time interval is from    1.880 sec. to    2.880 sec.
     
    Spectral model in power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 1.86970     ( -0.211614   0.226112 )
    Norm@50keV  : 1.80287E-02    ( -0.0029241   0.00286686 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          79.61 using 59 PHA bins.
    # Reduced chi-squared =          1.397 for     57 degrees of freedom 
    # Null hypothesis probability =   2.563886e-02
     
    Photon flux (15-150 keV)    in 1 sec: 2.55482 ( -0.34886  0.3489 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 1.65764e-07 ( -2.64291e-08  2.68687e-08 ) ergs/cm2
     
    
    Cutoff power-law model
    Time interval is from    1.880 sec. to    2.880 sec.
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: -0.501238     ( -2.25263   1.43495 )
    Epeak [keV] : 43.2104      ( -6.12201 10.5987 )
    Norm@50keV  : 0.437649    ( -0.45185   9.80023 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          69.49 using 59 PHA bins.
    # Reduced chi-squared =          1.241 for     56 degrees of freedom 
    # Null hypothesis probability =   1.062866e-01
     
    Photon flux (15-150 keV)    in 1 sec: 2.47245 ( -0.35215  0.35269 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 1.43747e-07 ( -2.53284e-08  2.82021e-08 ) ergs/cm2
     
    
    Band function
    Time interval is from    1.880 sec. to    2.880 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]    : 10.6207  (-1.26572  1.44215)
    R^2/D10^2   : 1.07477  (-0.413106   0.646585)
    (R is the radius in km and D10 is the distance to the source in units of 10 kpc)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          70.37 using 59 PHA bins.
    # Reduced chi-squared =          1.234 for     57 degrees of freedom 
    # Null hypothesis probability =   1.099441e-01
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  2.513e-08   5.870e-09
    25- 50  6.787e-08   1.091e-08
    50-150  4.206e-08   1.365e-08
    15-150  1.351e-07   2.490e-08
    
    Thermal bremsstrahlung (OTTB)
     
     
    Spectral model: thermal bremsstrahlung
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT [keV]    : 77.6648       (-24.7374      45.5982)
    Norm        : 12.4964       (-2.2059     2.6682)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          74.26 using 59 PHA bins.
    # Reduced chi-squared =          1.303 for     57 degrees of freedom 
    # Null hypothesis probability =   6.203311e-02
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  3.236e-08   6.155e-09
    25- 50  5.289e-08   7.910e-09
    50-150  7.317e-08   3.707e-08
    15-150  1.584e-07   3.965e-08
    
    Double BB
    #Fit statistic : Chi-Squared =          67.88 using 59 PHA bins.
    #Fit statistic : Chi-Squared =          67.87 using 59 PHA bins.
    #Fit statistic : Chi-Squared =          67.85 using 59 PHA bins.
    # Reduced chi-squared =          1.273 for     55 degrees of freedom 
    # Reduced chi-squared =          1.235 for     55 degrees of freedom 
    # Reduced chi-squared =          1.234 for     55 degrees of freedom 
    # Reduced chi-squared =          1.234 for     55 degrees of freedom 
    # Reduced chi-squared =          1.234 for     55 degrees of freedom 
    # Null hypothesis probability =   8.360412e-02
    # Null hypothesis probability =   1.133742e-01
    # Null hypothesis probability =   1.138397e-01
    # Null hypothesis probability =   1.140872e-01
    # Null hypothesis probability =   1.143627e-01
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  2.640e-08   9.379e-09
    25- 50  6.630e-08   2.309e-08
    50-150  4.388e-08   1.765e-08
    15-150  1.366e-07   4.451e-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: 2.00966     ( -0.128188   0.132809 )
    Norm@50keV  : 9.84273E-03    ( -0.000871439   0.000860643 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          96.41 using 59 PHA bins.
    # Reduced chi-squared =          1.691 for     57 degrees of freedom 
    # Null hypothesis probability =   8.625131e-04
     
    Photon flux (15-150 keV)    in 10.5 sec: 1.48300 ( -0.10861  0.108674 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 9.53583e-07 ( -7.96154e-08  8.05162e-08 ) ergs/cm2
     
    
    Cutoff power-law model
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 0.576609     ( -0.887685   0.730758 )
    Epeak [keV] : 40.4837      ( -5.03485 6.24621 )
    Norm@50keV  : 6.70989E-02    ( -0.0417783   0.158556 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          83.18 using 59 PHA bins.
    # Reduced chi-squared =          1.485 for     56 degrees of freedom 
    # Null hypothesis probability =   1.067228e-02
     
    Photon flux (15-150 keV)    in 10.5 sec: 1.40984 ( -0.11346  0.11381 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 8.41702e-07 ( -8.63341e-08  9.23013e-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)  = 2.99e-07
    S(50-100 keV) = 2.93e-07
    

    T90 vs. Hardness ratio plot

    T90                                   = 10 sec.
    Hardness ratio (energy fluence ratio) = 0.979933
    

    Color vs. Color plot

    Count Ratio  (25-50 keV) / (15-25 keV) = 1.28055
    Count Ratio (50-100 keV) / (15-25 keV) = 0.600678
    

    Mask shadow pattern

    IMX = -6.311577760349268E-01, IMY = 4.695657479227315E-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:
    -239.120000 -0.120000
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
    170.1571 -60.6493    5.1  44.8  151.7  -1.8807  -2.3    4.9	Cen X-3                       
    186.9112 -62.7407    3.8  49.0  161.3   2.7952   3.1    7.2	GX 301-2                      
     86.4758  -5.6580    3.0  52.3   29.8   5.0467   3.9 ------	UNKNOWN                       
    180.1996 -58.1628    2.5  50.2  154.0   4.7202   4.6 ------	UNKNOWN                       
     95.1514 -44.3058    2.5  18.0   68.1   1.3296   4.5 ------	UNKNOWN                       
    241.3735 -64.5817    2.6  57.7 -171.4   6.7074   4.4 ------	UNKNOWN                       
    357.5974 -65.3765    2.8  35.6 -120.1   1.9191   4.1 ------	UNKNOWN                       
     19.3388 -35.8731    3.6  42.3  -68.9   4.0704   3.3 ------	UNKNOWN                       
    

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

    Time interval of the image:
    -0.120000 10.380600
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
    170.5567 -60.6272    5.0  44.9  151.8  -0.3068  -2.3    7.1	Cen X-3                       
    186.9598 -62.7142    9.0  49.1  161.3  -0.1933  -1.3    9.0	GX 301-2                      
     80.7240  -5.2503    1.9  52.2   22.6   1.0534   6.1 ------	UNKNOWN                       
    205.0691 -60.1765    2.3  56.2  168.2   1.3274   5.0 ------	UNKNOWN                       
     64.4611 -14.1312    2.5  43.9    0.5   0.3670   4.7 ------	UNKNOWN                       
    259.7251 -71.1364    2.2  51.6 -162.6   0.7326   5.1 ------	UNKNOWN                       
    330.1354 -76.6702    0.5  38.2 -143.4   1.7453  21.5 ------	UNKNOWN                       
    341.6834 -75.8537    2.4  36.2 -140.0   0.3546   4.8 ------	UNKNOWN                       
    274.6603 -65.0998    2.5  56.8 -154.8   1.4722   4.5 ------	UNKNOWN                       
    

    Post-slew image of 15-350 keV band

    Time interval of the image:
    67.380570 962.924600
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
    186.6338 -62.9459    0.0  38.5  112.7   8.6627   1.2   10.6	GX 301-2                      
    255.9228 -37.8050   13.7  49.8 -178.0   5.1486   0.8    3.8	4U 1700-377                   
    256.5206 -36.3739    5.4  51.0 -176.8  14.2657   2.1    5.1	GX 349+2                      
    264.8194 -44.4213    5.8  41.4 -171.8  -8.2012  -2.0    3.7	4U 1735-44                    
    275.8834 -30.2616    5.7  52.7 -155.0  16.1880   2.0    6.7	H1820-303                     
    262.9464 -33.9564   11.4  51.9 -169.5  -6.9889  -1.0    7.6	GX 354-0                      
     97.3418 -50.2838    2.9  48.7   44.3  28.8518   4.1 ------	UNKNOWN                       
    221.3293 -47.9699    3.2  47.7  145.9  35.1117   3.6 ------	UNKNOWN                       
    
    Plot creation:
    Thu Mar 21 16:31:13 EDT 2019