Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time: Fri Jan 17 17:14:25 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger430094
======================================================================

  Trigger: 00430094      Segment: 000

  BAT Trigger Time: 301902143.808   [s; MET]
      Trigger Stop: 301902144.832   [s; MET]
               UTC: 2010-07-27T05:42:17.784900    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 154.165673991183   Dec: -21.3644000852862  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.09
     Image Trigger?:     NO
     Rate S/N Ratio:     13.856406460551  [ if not an image trigger ]
     Image S/N Ratio:    8.09

  Analysis Position:   [ source = BAT ]
    RA: 154.165673991183   Dec: -21.3644000852862  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 154.181911705207   Dec: -21.4096486808849  [deg; J2000]  
        { 10h 16m 43.7s , -21d 24' 34.7" }
         +/- 1.57663600809825 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.824448966925673 [arcmin] (formal 1-sigma fit error)
    SNR: 15.8724838128324
 
  Angular difference between the analysis and refined position is 2.862469 arcmin
 
  Partial Coding Fraction: 0.984375    [ including projection effects ]

  Duration
     T90: 71.8999999165535 +/- 13.0182594444024
        Measured from: -50.6840000152588
                   to: 21.2159999012947     [s; relative to TRIGTIME]
     T50: 12.4439999461174 +/- 18.765219008616
        Measured from: -1.02400004863739
                   to: 11.41999989748     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 1.33199995756149     
                   to: 2.33199995756149     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -74.6080000400543     
                   to: 29.839999973774     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.766525   0.882234   0.503569   0.068673
           0.047701   0.048961   0.043055   0.037422 [error]
 Peak      0.042453   0.064331   0.037203   0.007492
           0.005277   0.005509   0.004938   0.003871 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100  104.448  -74.608   29.840
T90    71.900  -50.684   21.216
T50    12.444   -1.024   11.420
Peak    1.000    1.332    2.332
 
 
====== 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: 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      -1.809    -0.128      0.125       -           -               -         1.25e-03     -9.66e-05          9.54e-05      82.010   57
CPL     -1.472    -0.423      0.547       69.525     -21.079       -69.525      1.92e-03     -7.34e-04          1.88e-03      80.630   56
 
 
=== 1-s peak 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      -1.716     -0.193     0.186       -           -               -         8.90e-03     -1.09e-03          1.07e-03      65.170   57
CPL     -1.080     -0.705     0.871       63.044     -17.859       -63.044      2.02e-02     -1.18e-02          4.26e-02      62.920   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   2.23e-07  3.40e-07  3.88e-07  8.47e-07  1.20e-06  1.80e-06   erg/cm2
      90%_error_low -2.29e-08 -2.24e-08 -4.13e-08 -1.72e-07 -9.40e-08 -2.14e-07   erg/cm2
      90%_error_hi   2.34e-08  2.24e-08  4.16e-08  2.01e-07  9.54e-08  2.36e-07   erg/cm2
Peak flux       PL   4.50e-01  3.99e-01  2.43e-01  2.24e-01  1.19e+00  1.32e+00   ph/cm2/s
      90%_error_low -7.07e-02 -4.22e-02 -3.88e-02 -6.29e-02 -1.25e-01 -1.43e-01   ph/cm2/s
      90%_error_hi   7.31e-02  4.21e-02  3.90e-02  7.67e-02  1.25e-01  1.44e-01   ph/cm2/s
 
Fluence        CPL   2.14e-07  3.53e-07  3.86e-07  4.70e-07  1.16e-06  1.42e-06   erg/cm2
      90%_error_low -2.64e-08 -2.87e-08 -4.44e-08 -2.56e-07 -1.12e-07 -2.85e-07   erg/cm2
      90%_error_hi   2.65e-08  2.95e-08  4.37e-08  4.32e-07  1.14e-07  4.65e-07   erg/cm2
Peak flux      CPL   4.20e-01  4.29e-01  2.44e-01  9.81e-02  1.16e+00  1.19e+00   ph/cm2/s
      90%_error_low -8.00e-02 -5.42e-02 -4.41e-02 -6.18e-02 -1.29e-01 -1.47e-01   ph/cm2/s
      90%_error_hi   8.11e-02  5.65e-02  4.30e-02  1.50e-01  1.29e-01  1.88e-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
  154.1819   -21.4096   0.0121    12.4010  -123.1216         1.6085380     15.872 TRIG_00430094                 
 
Foreground time interval of the image:
-74.608  10.893 (delta_t =  85.501 [sec])
Background time interval of the image:
-239.808 -74.608 (delta_t = 165.200 [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  -74.608 sec. to   29.840 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.80865     ( -0.128332   0.125385 )
Norm@50keV  : 1.25243E-03    ( -9.66337e-05   9.53768e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          82.01 using 59 PHA bins.
# Reduced chi-squared =          1.439 for     57 degrees of freedom 
# Null hypothesis probability =   1.667272e-02
 
Photon flux (15-150 keV)    in 104.4 sec: 0.173174 ( -0.011528  0.011537 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.20356e-06 ( -9.40313e-08  9.53792e-08 ) ergs/cm2
    Cutoff power-law model
    Time interval is from  -74.608 sec. to   29.840 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.47153     ( -0.423192   0.547273 )
Epeak [keV] : 69.5255      ( -21.0795 -69.5256 )
Norm@50keV  : 1.92046E-03    ( -0.000734201   0.00188436 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          80.63 using 59 PHA bins.
# Reduced chi-squared =          1.440 for     56 degrees of freedom 
# Null hypothesis probability =   1.725037e-02
 
Photon flux (15-150 keV)    in 104.4 sec: 0.170093 ( -0.012355  0.012318 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.15862e-06 ( -1.1243e-07  1.14209e-07 ) ergs/cm2

    1-s peak spectrum fit

    Power-law model
    Time interval is from    1.332 sec. to    2.332 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.71558     ( -0.192624   0.185776 )
Norm@50keV  : 8.89560E-03    ( -0.00109248   0.00107293 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.17 using 59 PHA bins.
# Reduced chi-squared =          1.143 for     57 degrees of freedom 
# Null hypothesis probability =   2.138199e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.18799 ( -0.12514  0.12515 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.22773e-08 ( -1.04896e-08  1.07114e-08 ) ergs/cm2
    Cutoff power-law model
    Time interval is from    1.332 sec. to    2.332 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.08032     ( -0.705121   0.871225 )
Epeak [keV] : 63.0442      ( -17.8587 -63.0442 )
Norm@50keV  : 2.02451E-02    ( -0.0117881   0.0426242 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.92 using 59 PHA bins.
# Reduced chi-squared =          1.124 for     56 degrees of freedom 
# Null hypothesis probability =   2.446049e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.15832 ( -0.12926  0.1294 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.67609e-08 ( -1.18347e-08  1.23088e-08 ) ergs/cm2

    Time-resolved spectra




    Distribution

    T90 vs. Hardness ratio plot 

    T90                                   = N/A sec.
Hardness ratio (energy fluence ratio) = N/A

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

    S(15-50 keV)  = N/A
S(50-150 keV) = N/A

    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 = -1.201474119564260E-01, IMY = 1.841542455666287E-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:
-239.808000 -74.608000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.4102 -40.5238    6.9  29.2  178.2   0.2218   1.7    5.7	Vela X-1                      
170.3880 -60.6205   12.3  34.1  121.2   0.2179   0.9    2.1	Cen X-3                       
186.9335 -62.7113   35.7  38.5  109.7   0.1347   0.3    8.4	GX 301-2                      
193.9563  -1.6048    2.7  36.3   -4.4   0.7163   4.2 ------	UNKNOWN                       
111.2922 -13.2450    2.5  53.2 -142.3   3.0644   4.6 ------	UNKNOWN                       
168.2178  20.4419    4.2  47.1  -53.2   1.5660   2.7 ------	UNKNOWN

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

    Time interval of the image:
-74.608000 10.892600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.5193 -40.5433    8.6  29.1  178.1   0.1494   1.3    0.8	Vela X-1                      
170.1760 -60.7013    6.5  34.2  121.4   0.3414   1.8    6.2	Cen X-3                       
186.5859 -62.8166    4.1  38.5  110.0   0.9457   2.8    3.4	GX 301-2                      
192.4021 -51.9517    2.6  31.9   94.0   0.8458   4.4 ------	UNKNOWN                       
154.1819 -21.4096    0.7  12.4 -123.1   1.6082  15.8 ------	UNKNOWN

    Post-slew image of 15-350 keV band 

    Time interval of the image:
45.492600 349.644000
351.192000 962.281300
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.2900 -40.5290    6.2  25.0  161.5  -0.9624  -1.8   11.0	Vela X-1                      
170.4094 -60.7373    5.4  41.0  113.9   3.5109   2.1    7.4	Cen X-3                       
 89.9845 -35.7208    3.7  57.2 -173.7   7.0857   3.1 ------	UNKNOWN