Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time: Tue May  5 19:50:46 EDT 2015
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger636005
======================================================================

  Trigger: 00636005      Segment: 000

  BAT Trigger Time: 448823134.848   [s; MET]
      Trigger Stop: 448823147.008   [s; MET]
               UTC: 2015-03-23T17:05:21.499240    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 192.612689304227   Dec: 50.1982572072614  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.46
     Image Trigger?:     NO
     Rate S/N Ratio:     10.7238052947636  [ if not an image trigger ]
     Image S/N Ratio:    7.46

  Analysis Position:   [ source = BAT ]
    RA: 192.612689304227   Dec: 50.1982572072614  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 192.624090644467   Dec: 50.1686282711958  [deg; J2000]  
        { 12h 50m 29.8s , +50d 10' 07.1" }
         +/- 2.43594594882257 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.38034333208073 [arcmin] (formal 1-sigma fit error)
    SNR: 8.52581738827304
 
  Angular difference between the analysis and refined position is 1.830908 arcmin
 
  Partial Coding Fraction: 0.2695312    [ including projection effects ]

  Duration
     T90: 159.664000034332 +/- 44.6175204970225
        Measured from: -21.0799999833107
                   to: 138.584000051022     [s; relative to TRIGTIME]
     T50: 32.8000000715256 +/- 97.9207581678675
        Measured from: -12.3280000090599
                   to: 20.4720000624657     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 5.98000001907349     
                   to: 6.98000001907349     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -23.2879999876022     
                   to: 166.472000002861     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.748279   0.935214   0.429171   0.148731
           0.129377   0.135733   0.120905   0.114502 [error]
 Peak      0.045049   0.043338   0.020361   0.011641
           0.012136   0.013102   0.011311   0.009960 [error]

     [ fluence units of on-axis counts / fully illuminated detector ] 

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100  189.760  -23.288  166.472
T90   159.664  -21.080  138.584
T50    32.800  -12.328   20.472
Peak    1.000    5.980    6.980
 
 
====== Spectral Analysis Summary =====================================
 
Model      : spectral model: simple power-law (PL) and cutoff power-law (CPL)
Ph_index   : photon index: E^{Ph_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 both the PL model and CPL model
Nomr_90err : 90% error of the normalization
chi2       : Chi-Squared
dof        : degree of freedo
 
=== Time-averaged spectral analysis ===
(Best model with acceptable fit: PL)
 
Model Ph_index Ph_90err_low Ph_90err_hi  Epeak  Epeak_90err_low  Epeak_90err_hi  Norm       Nomr_90err_low    Norm_90err_hi    chi2    dof
PL      -1.937    -0.316      0.290       -           -               -         7.61e-04     -1.60e-04          1.55e-04      68.140   57
CPL     -0.039    -1.679      2.245       43.250     -14.850        22.825      9.20e-03     -9.20e-03          1.46e-01      64.430   56
 
 
=== 1-s peak spectral analysis ===
(Best model with acceptable fit: N/A)
 
Model Ph_index Ph_90err_low Ph_90err_hi  Epeak  Epeak_90err_low  Epeak_90err_hi  Norm       Nomr_90err_low    Norm_90err_hi    chi2    dof
PL      -1.983     -0.627     0.537       -           -               -         7.09e-03     -2.88e-03          2.75e-03      52.630   57
CPL      0.303     -2.439     4.846       40.706      N/A           N/A         1.52e-01        N/A               N/A         50.990   56
 
 
=== 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         PL   2.79e-07  3.93e-07  4.10e-07  7.88e-07  1.33e-06  1.87e-06   erg/cm2
      90%_error_low -6.42e-08 -6.66e-08 -1.12e-07 -3.57e-07 -2.64e-07 -5.02e-07   erg/cm2
      90%_error_hi   6.67e-08  6.65e-08  1.16e-07  5.08e-07  2.72e-07  6.18e-07   erg/cm2
Peak flux       PL   4.65e-01  3.52e-01  1.78e-01  1.29e-01  1.05e+00  1.12e+00   ph/cm2/s
      90%_error_low -2.08e-01 -1.15e-01 -8.77e-02 -1.29e-01 -3.43e-01 -3.67e-01   ph/cm2/s
      90%_error_hi   2.14e-01  1.14e-01  9.21e-02  1.60e-01  3.44e-01  3.70e-01   ph/cm2/s
 
Fluence        CPL   2.31e-07  4.81e-07  3.76e-07  7.73e-08  1.15e-06  1.17e-06   erg/cm2
      90%_error_low -8.39e-08 -1.01e-07 -1.37e-07 -6.60e-08 -2.37e-07 -2.47e-07   erg/cm2
      90%_error_hi   8.13e-08  1.02e-07  1.41e-07  4.63e-07  2.87e-07  5.07e-07   erg/cm2
Peak flux      CPL   3.76e-01  4.49e-01  1.64e-01  1.20e-02  9.99e-01  1.00e+00   ph/cm2/s
      90%_error_low -3.76e-01 -1.69e-01 -1.07e-01 -1.20e-02 -3.43e-01 -3.43e-01   ph/cm2/s
      90%_error_hi   2.51e-01  1.72e-01  1.15e-01  1.59e-01  3.48e-01  3.55e-01   ph/cm2/s
 
======================================================================
  • 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
      192.6241    50.1686   0.0225    45.4984    16.2459         2.3603968      8.526 TRIG_00636005                 
     
    Foreground time interval of the image:
    -23.288  58.853 (delta_t =  82.141 [sec])
    Background time interval of the image:
    -122.947 -23.288 (delta_t =  99.659 [sec])
    




    Light Curves

    Note: The mask-weighted lightcurves have units of either count/det or counts/sec/det, where a det is 0.4 x 0.4 = 0.16 sq cm.

    Full-time range; 1 s binning

    Bokeh Plot

    Other quick-look light curves:




    Spectra

    Notes:

    Time averaged spectrum fit using the average DRM

    Power-law model
    Time interval is from  -23.288 sec. to  166.472 sec.
     
    Spectral model in power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: -1.93695     ( -0.316095   0.290407 )
    Norm@50keV  : 7.61238E-04    ( -0.000159675   0.000154843 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          68.14 using 59 PHA bins.
    # Reduced chi-squared =          1.195 for     57 degrees of freedom 
    # Null hypothesis probability =   1.483934e-01
     
    Photon flux (15-150 keV)    in 189.8 sec: 0.111007 ( -0.0187785  0.018784 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 1.3294e-06 ( -2.64262e-07  2.71875e-07 ) ergs/cm2
     
    
    Cutoff power-law model
    Time interval is from  -23.288 sec. to  166.472 sec.
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: -0.038937     ( -1.68821   2.23569 )
    Epeak [keV] : 43.2496      ( -14.8586 22.8168 )
    Norm@50keV  : 9.20319E-03    ( -0.00936388   0.14608 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          64.43 using 59 PHA bins.
    # Reduced chi-squared =          1.150 for     56 degrees of freedom 
    # Null hypothesis probability =   2.056411e-01
     
    Photon flux (15-150 keV)    in 189.8 sec: 0.104353 ( -0.0195323  0.019637 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 1.15416e-06 ( -2.374e-07  2.87112e-07 ) ergs/cm2
     
    

    1-s peak spectrum fit

    Power-law model
    Time interval is from    5.980 sec. to    6.980 sec.
     
    Spectral model in power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: -1.98287     ( -0.627277   0.536628 )
    Norm@50keV  : 7.08582E-03    ( -0.00288411   0.00275176 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          52.63 using 59 PHA bins.
    # Reduced chi-squared =         0.9233 for     57 degrees of freedom 
    # Null hypothesis probability =   6.396153e-01
     
    Photon flux (15-150 keV)    in 1 sec: 1.05465 ( -0.343426  0.34378 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 6.5307e-08 ( -2.42223e-08  2.55022e-08 ) ergs/cm2
     
    
    Cutoff power-law model
    Time interval is from    5.980 sec. to    6.980 sec.
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 0.30303     ( -2.47284   4.81221 )
    Epeak [keV] : 40.7057      (   )
    Norm@50keV  : 0.151808    (     )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          50.99 using 59 PHA bins.
    # Reduced chi-squared =         0.9105 for     56 degrees of freedom 
    # Null hypothesis probability =   6.646413e-01
     
    Photon flux (15-150 keV)    in 1 sec: 0.999231 ( -0.343088  0.348059 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 5.62005e-08 ( -2.01194e-08  2.63653e-08 ) ergs/cm2
     
    

    Time-resolved spectra




    Distribution

    T90 vs. Hardness ratio plot

    T90                                   = 159.664 sec.
    Hardness ratio (energy fluence ratio) = 1.04474428869
    

    S(15-50 keV) vs. S(50-150 keV) plot

    S(15-50 keV)  = 6.710219e-07
    S(50-150 keV) = 6.583946e-07
    

    The dash-dotted line and the dashed line traces the fluences calculated from the Band function with Epeak = 15 and 150 keV, respectively. Both lines assume a canonical values of alpha = -1 and beta = -2.5.




    Mask shadow pattern

    IMX = 9.769203130013407E-01, IMY = -2.846699612720374E-01
    

    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:
    -122.947400 -23.288000
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
    213.6915  33.7835    3.3  46.6   47.7   1.8281   3.5 ------	UNKNOWN                       
    157.9344  10.7285    2.2  13.4  -81.3   0.5681   5.2 ------	UNKNOWN                       
    

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

    Time interval of the image:
    -23.288000 58.852600
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
    192.6241  50.1686    1.4  45.5   16.2   2.3605   8.5 ------	UNKNOWN                       
    

    Post-slew image of 15-350 keV band

    Time interval of the image:
    157.652600 962.190800
    1913.152000 2000.000000
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
    254.2955  35.4016   45.8  46.2  -18.5   0.1929   0.3    8.7	Her X-1                       
    240.0152  40.2195    2.8  34.2  -14.4   1.9554   4.2 ------	UNKNOWN                       
    232.4179  51.5339    2.0  24.8  -31.3   2.0281   5.8 ------	UNKNOWN                       
    242.7814  44.9460    2.5  33.6  -23.5   2.0807   4.6 ------	UNKNOWN                       
    282.6619  80.7078    3.5  40.7  -88.3   7.3266   3.2 ------	UNKNOWN