Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time: Wed Jan 22 18:17:12 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger192059
======================================================================

  Trigger: 00192059      Segment: 000

  BAT Trigger Time: 162367464.96   [s; MET]
      Trigger Stop: 162367465.984   [s; MET]
               UTC: 2006-02-23T06:04:23.927580    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 55.2160197959957   Dec: -17.1390558972725  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9.99
     Image Trigger?:     NO
     Rate S/N Ratio:     17.8605710994918  [ if not an image trigger ]
     Image S/N Ratio:    9.99

  Analysis Position:   [ source = BAT ]
    RA: 55.2160197959957   Dec: -17.1390558972725  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 55.1955017215853   Dec: -17.1350305460266  [deg; J2000]  
        { 03h 40m 46.9s , -17d 08' 06.1" }
         +/- 1.18503486532795 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.389361545606414 [arcmin] (formal 1-sigma fit error)
    SNR: 23.8664704477087
 
  Angular difference between the analysis and refined position is 1.200964 arcmin
 
  Partial Coding Fraction: 0.6953125    [ including projection effects ]

  Duration
     T90: 11.3200000226498 +/- 1.07260432986126
        Measured from: -2.08000001311302
                   to: 9.24000000953674     [s; relative to TRIGTIME]
     T50: 5.08000001311302 +/- 0.723071239532377
        Measured from: -0.372000008821487
                   to: 4.70800000429153     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.0760000050067902     
                   to: 1.07600000500679     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -2.92399999499321     
                   to: 10.0320000052452     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.322855   0.444151   0.283478   0.048218
           0.022906   0.024196   0.021339   0.018491 [error]
 Peak      0.042662   0.061620   0.041585   0.020490
           0.006587   0.006999   0.006416   0.005421 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100   12.956   -2.924   10.032
T90    11.320   -2.080    9.240
T50     5.080   -0.372    4.708
Peak    1.000    0.076    1.076
 
 
====== 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      -1.689    -0.113      0.111       -           -               -         5.61e-03     -3.86e-04          3.84e-04      59.810   57
CPL     -1.053    -0.463      0.523       69.870     -14.045        60.337      1.22e-02     -5.18e-03          1.07e-02      54.090   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      -1.579     -0.220     0.215       -           -               -         1.06e-02     -1.42e-03          1.40e-03      58.630   57
CPL     -1.251     -0.528     0.994      108.587     -82.683      -108.587      1.58e-02        N/A               N/A         58.180   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   1.11e-07  1.82e-07  2.25e-07  5.54e-07  6.74e-07  1.07e-06   erg/cm2
      90%_error_low -1.13e-08 -1.19e-08 -2.04e-08 -9.76e-08 -4.86e-08 -1.17e-07   erg/cm2
      90%_error_hi   1.16e-08  1.19e-08  2.05e-08  1.11e-07  4.90e-08  1.27e-07   erg/cm2
Peak flux       PL   4.70e-01  4.52e-01  3.03e-01  3.16e-01  1.35e+00  1.54e+00   ph/cm2/s
      90%_error_low -9.40e-02 -5.91e-02 -5.16e-02 -9.60e-02 -1.72e-01 -1.97e-01   ph/cm2/s
      90%_error_hi   9.87e-02  5.87e-02  5.11e-02  1.18e-01  1.72e-01  1.98e-01   ph/cm2/s
 
Fluence        CPL   1.02e-07  1.95e-07  2.29e-07  2.19e-07  6.39e-07  7.45e-07   erg/cm2
      90%_error_low -1.32e-08 -1.52e-08 -2.26e-08 -1.00e-07 -5.46e-08 -1.14e-07   erg/cm2
      90%_error_hi   1.34e-08  1.56e-08  2.25e-08  2.00e-07  5.50e-08  2.02e-07   erg/cm2
Peak flux      CPL   4.49e-01  4.69e-01  3.09e-01  2.10e-01  1.34e+00  1.44e+00   ph/cm2/s
      90%_error_low -1.09e-01 -7.09e-02 -5.49e-02 -1.36e-01 -1.77e-01 -2.34e-01   ph/cm2/s
      90%_error_hi   1.10e-01  7.60e-02  5.67e-02  1.38e-01  1.76e-01  2.80e-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
   55.1955   -17.1350   0.0080    34.3504   178.6801         1.0874325     23.866 TRIG_00192059                 
 
Foreground time interval of the image:
 -2.924  10.032 (delta_t =  12.956 [sec])
Background time interval of the image:
-299.960  -2.924 (delta_t = 297.036 [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   -2.924 sec. to   10.032 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.68877     ( -0.112703   0.11121 )
Norm@50keV  : 5.61429E-03    ( -0.000386295   0.000383814 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.81 using 59 PHA bins.
# Reduced chi-squared =          1.049 for     57 degrees of freedom 
# Null hypothesis probability =   3.741043e-01
 
Photon flux (15-150 keV)    in 12.96 sec: 0.742770 ( -0.048793  0.048847 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.74396e-07 ( -4.85964e-08  4.89819e-08 ) ergs/cm2
    Cutoff power-law model
    Time interval is from   -2.924 sec. to   10.032 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.05341     ( -0.462967   0.522722 )
Epeak [keV] : 69.8697      ( -14.0446 60.3371 )
Norm@50keV  : 1.22065E-02    ( -0.00517865   0.0106882 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.09 using 59 PHA bins.
# Reduced chi-squared =         0.9659 for     56 degrees of freedom 
# Null hypothesis probability =   5.475183e-01
 
Photon flux (15-150 keV)    in 12.96 sec: 0.722547 ( -0.051012  0.050976 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.39316e-07 ( -5.4586e-08  5.5013e-08 ) ergs/cm2

    1-s peak spectrum fit

    Power-law model
    Time interval is from    0.076 sec. to    1.076 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.57879     ( -0.219988   0.214823 )
Norm@50keV  : 1.05963E-02    ( -0.00142255   0.00140453 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.63 using 59 PHA bins.
# Reduced chi-squared =          1.029 for     57 degrees of freedom 
# Null hypothesis probability =   4.153679e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.35292 ( -0.17186  0.17201 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.93779e-08 ( -1.4319e-08  1.45054e-08 ) ergs/cm2
    Cutoff power-law model
    Time interval is from    0.076 sec. to    1.076 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.25054     ( -0.527486   0.993805 )
Epeak [keV] : 108.587      ( -82.745 -108.649 )
Norm@50keV  : 1.58383E-02    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.18 using 59 PHA bins.
# Reduced chi-squared =          1.039 for     56 degrees of freedom 
# Null hypothesis probability =   3.950229e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.33769 ( -0.17672  0.17592 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.6732e-08 ( -1.60717e-08  1.58814e-08 ) ergs/cm2

    Time-resolved spectra




    Distribution

    T90 vs. Hardness ratio plot 

    T90                                   = 11.32 sec.
Hardness ratio (energy fluence ratio) = 1.24079576254

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

    S(15-50 keV)  = 2.926568e-07
S(50-150 keV) = 3.817451e-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 = -6.832624245448796E-01, IMY = -1.574307026352405E-02

    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:
-299.960000 -2.924000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6193  22.0333    0.6  31.7   82.1  11.4833  19.5    1.4	Crab                          
 83.4875 -15.5563    2.4  46.0  139.9   4.5135   4.7 ------	UNKNOWN                       
 49.0711   5.7897    2.5  11.2 -166.4   1.2923   4.6 ------	UNKNOWN                       
 45.9057 -41.6784    3.1  58.7 -169.2   5.2801   3.7 ------	UNKNOWN                       
 32.7019 -28.8093    2.3  48.8 -152.4   2.8944   4.9 ------	UNKNOWN                       
  0.6228  54.9827    2.4  53.7  -26.1   3.8616   4.7 ------	UNKNOWN                       
  5.3909  22.2703    2.8  42.6  -68.4   3.8843   4.1 ------	UNKNOWN

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

    Time interval of the image:
-2.924000 10.032000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6345  22.1216    6.2  31.7   81.9   0.1233   1.9    6.4	Crab                          
 55.1947 -17.1353    0.5  34.4  178.7   1.0982  24.1 ------	UNKNOWN                       
 10.4409  68.0626    2.6  57.1   -9.8   0.7382   4.5 ------	UNKNOWN                       
359.7046  61.5769    2.4  57.0  -19.2   0.6855   4.9 ------	UNKNOWN

    Post-slew image of 15-350 keV band 

    Time interval of the image:
69.940600 302.111700
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 87.8213  11.2216    2.8  42.9   57.3   4.2017   4.1 ------	UNKNOWN                       
 88.3087 -36.3918    2.3  35.0  136.3   1.9747   5.1 ------	UNKNOWN                       
 67.1089 -44.5274    3.0  29.2  168.8   0.9823   3.9 ------	UNKNOWN                       
 61.7247 -75.2178    2.9  58.2 -175.6   4.9000   4.0 ------	UNKNOWN                       
 31.1880 -42.1362    2.6  32.3 -139.3   1.1396   4.4 ------	UNKNOWN                       
 26.2761 -74.1190    2.3  59.2 -164.8   6.0172   5.0 ------	UNKNOWN                       
 20.1637 -56.9049    2.6  47.6 -148.5   2.0806   4.4 ------	UNKNOWN