Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time: Sat Jan 11 23:41:22 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger567163
======================================================================

  Trigger: 00567163      Segment: 000

  BAT Trigger Time: 398879668.212   [s; MET]
      Trigger Stop: 398879668.244   [s; MET]
               UTC: 2013-08-22T15:54:17.270440    [includes UTCF correction] 
       Where From?: (*SHORT BURST*) TDRSS scaled map message

  BAT 
    RA: 27.9397002132013   Dec: -3.21912082484814  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.43
     Image Trigger?:     NO
     Rate S/N Ratio:     19.6468827043885  [ if not an image trigger ]
     Image S/N Ratio:    7.43

  Analysis Position:   [ source = BAT ]
    RA: 27.9397002132013   Dec: -3.21912082484814  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 27.929772957175   Dec: -3.19358332719016  [deg; J2000]  
        { 01h 51m 43.1s , -03d 11' 36.9" }
         +/- 2.44867327978622 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.961374981541333 [arcmin] (formal 1-sigma fit error)
    SNR: 8.46258202423166
 
  Angular difference between the analysis and refined position is 1.643612 arcmin
 
  Partial Coding Fraction: 0.9296875    [ including projection effects ]

  Duration
     T90: 0.043999969959259 +/- 0.0113137314268704
        Measured from: -0.00400000810623169
                   to: 0.0399999618530273     [s; relative to TRIGTIME]
     T50: 0.0199999213218689 +/- 0.0113137314268704
        Measured from: 0.00800001621246338
                   to: 0.0279999375343323     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.477999985218048     
                   to: 0.522000014781952     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.00400000810623169     
                   to: 0.043999969959259     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.007412   0.007896   0.009023  -0.000204
           0.001559   0.001739   0.001487   0.001054 [error]
 Peak      0.013348   0.012007   0.012620  -0.001754
           0.005095   0.005191   0.004671   0.003949 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100    0.048   -0.004    0.044
T90     0.044   -0.004    0.040
T50     0.020    0.008    0.028
Peak    1.000   -0.478    0.522
 
 
====== 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      -1.673    -0.302      0.288       -           -               -         2.73e-02     -5.78e-03          5.71e-03      59.580   57
CPL      0.452    -1.556      2.247       60.315     -10.926        26.247      3.08e-01     -3.08e-01          2.57e+00      53.820   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      -1.866     -0.853     0.657       -           -               -         2.27e-03     -1.15e-03          1.05e-03      44.240   57
CPL     -0.998     -1.187     4.958       53.244      N/A           N/A         6.73e-03        N/A               N/A         43.950   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   1.97e-09  3.26e-09  4.09e-09  1.02e-08  1.22e-08  1.95e-08   erg/cm2
      90%_error_low -5.61e-10 -6.69e-10 -1.06e-09 -4.38e-09 -2.65e-09 -5.70e-09   erg/cm2
      90%_error_hi   5.89e-10  6.66e-10  1.05e-09  5.80e-09  2.66e-09  6.66e-09   erg/cm2
Peak flux       PL   1.33e-01  1.08e-01  5.93e-02  4.77e-02  3.22e-01  3.48e-01   ph/cm2/s
      90%_error_low -6.55e-02 -4.06e-02 -3.60e-02 -4.77e-02 -1.20e-01 -1.33e-01   ph/cm2/s
      90%_error_hi   7.21e-02  4.03e-02  3.75e-02  7.94e-02  1.20e-01  1.37e-01   ph/cm2/s
 
Fluence        CPL   1.37e-09  4.13e-09  5.14e-09  1.90e-09  1.21e-08  1.25e-08   erg/cm2
      90%_error_low -7.33e-10 -9.31e-10 -1.41e-09 -1.28e-09 -2.52e-09 -1.59e-09   erg/cm2
      90%_error_hi   7.55e-10  9.69e-10  1.50e-09  3.77e-09  2.57e-09  3.77e-09   erg/cm2
Peak flux      CPL   1.19e-01  1.19e-01  6.23e-02  1.93e-02  3.15e-01  3.19e-01   ph/cm2/s
      90%_error_low     N/A   -6.55e-02 -4.01e-02     N/A   -1.23e-01 -1.27e-01   ph/cm2/s
      90%_error_hi      N/A    5.56e-02  4.46e-02     N/A    1.22e-01  1.47e-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
   27.9298    -3.1936   0.0228    19.2844    18.8145         0.0245257      8.463 TRIG_00567163                 
 
Foreground time interval of the image:
 -0.004   0.044 (delta_t =   0.048 [sec])
Background time interval of the image:
-185.911  -0.004 (delta_t = 185.907 [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   -0.004 sec. to    0.044 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.67252     ( -0.301636   0.288156 )
Norm@50keV  : 2.73438E-02    ( -0.00577729   0.00570914 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.58 using 59 PHA bins.
# Reduced chi-squared =          1.045 for     57 degrees of freedom 
# Null hypothesis probability =   3.819274e-01
 
Photon flux (15-150 keV)    in 0.048 sec: 3.59751 ( -0.73687  0.73775 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.21826e-08 ( -2.65092e-09  2.66445e-09 ) ergs/cm2
    Cutoff power-law model
    Time interval is from   -0.004 sec. to    0.044 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.451928     ( -1.56003   2.24349 )
Epeak [keV] : 60.3147      ( -10.915 26.258 )
Norm@50keV  : 0.308028    ( -0.309497   2.56839 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.82 using 59 PHA bins.
# Reduced chi-squared =         0.9611 for     56 degrees of freedom 
# Null hypothesis probability =   5.576789e-01
 
Photon flux (15-150 keV)    in 0.048 sec: 3.53513 ( -0.76916  0.75874 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.21451e-08 ( -2.52076e-09  2.57061e-09 ) ergs/cm2

    1-s peak spectrum fit

    Power-law model
    Time interval is from   -0.478 sec. to    0.522 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.86624     ( -0.852833   0.657105 )
Norm@50keV  : 2.27462E-03    ( -0.00115102   0.0010457 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          44.24 using 59 PHA bins.
# Reduced chi-squared =         0.7761 for     57 degrees of freedom 
# Null hypothesis probability =   8.914561e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.321872 ( -0.11983  0.119849 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.09146e-08 ( -9.53649e-09  1.03217e-08 ) ergs/cm2
    Cutoff power-law model
    Time interval is from   -0.478 sec. to    0.522 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.998189     ( -1.18945   4.95566 )
Epeak [keV] : 53.2438      (   )
Norm@50keV  : 6.73344E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.95 using 59 PHA bins.
# Reduced chi-squared =         0.7848 for     56 degrees of freedom 
# Null hypothesis probability =   8.786565e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.314629 ( -0.123333  0.121804 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.99205e-08 ( 0  0 ) ergs/cm2

    Time-resolved spectra




    Distribution

    T90 vs. Hardness ratio plot 

    T90                                   = 0.04399997 sec.
Hardness ratio (energy fluence ratio) = 1.25493124599

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

    S(15-50 keV)  = 5.230822e-09
S(50-150 keV) = 6.951935e-09

    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 = 3.311932371978128E-01, IMY = -1.128406262777303E-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:
-185.911420 -0.004000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
353.7746  -9.5915    2.7  39.4   82.0   2.7143   4.3 ------	UNKNOWN                       
356.4952 -12.4155    3.8  39.3   75.9   1.7679   3.1 ------	UNKNOWN                       
 13.5692 -12.9624    2.6  30.6   50.8   0.9600   4.4 ------	UNKNOWN                       
337.0685  35.1031    2.6  46.3  153.9   1.8815   4.4 ------	UNKNOWN                       
 72.4493  -1.6551    2.6  50.7  -44.3   3.4524   4.4 ------	UNKNOWN

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

    Time interval of the image:
-0.004000 0.044000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 27.9298  -3.1936    1.4  19.3   18.8   0.0245   8.5 ------	UNKNOWN                       
 14.9506  57.3254    2.5  42.2 -157.4   0.0211   4.7 ------	UNKNOWN                       
 66.2100 -11.0324    2.1  49.4  -29.7   0.0416   5.6 ------	UNKNOWN                       
 38.3748  61.6090    2.3  47.0 -140.8   0.0328   5.0 ------	UNKNOWN

    Post-slew image of 15-350 keV band 

    Time interval of the image:
57.088600 962.818600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
352.7849  10.5965    2.5  37.6  124.0   5.2316   4.6 ------	UNKNOWN                       
  3.2628  46.4721    2.8  54.3  171.2   8.3658   4.1 ------	UNKNOWN                       
 28.2558 -25.8586    3.3  22.6   11.2   1.4864   3.5 ------	UNKNOWN                       
 19.1858  20.4165    2.9  25.2  172.4   1.9481   4.0 ------	UNKNOWN                       
 39.8513 -36.6085    3.4  35.1   -4.8   1.9968   3.4 ------	UNKNOWN