Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time: Wed Jan 22 21:32:50 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger146129
======================================================================

  Trigger: 00146129      Segment: 000

  BAT Trigger Time: 143159426.048   [s; MET]
      Trigger Stop: 143159430.144   [s; MET]
               UTC: 2005-07-15T22:30:26.424240    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 155.669314942153   Dec: -0.0590341924076137  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9.08
     Image Trigger?:     NO
     Rate S/N Ratio:     11.8321595661992  [ if not an image trigger ]
     Image S/N Ratio:    9.08

  Analysis Position:   [ source = BAT ]
    RA: 155.669314942153   Dec: -0.0590341924076137  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 155.64228118609   Dec: -0.0267825690351626  [deg; J2000]  
        { 10h 22m 34.1s , -00d 01' 36.4" }
         +/- 1.3668130249648 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.627240573879364 [arcmin] (formal 1-sigma fit error)
    SNR: 19.46472286326
 
  Angular difference between the analysis and refined position is 2.524988 arcmin
 
  Partial Coding Fraction: 0.734375    [ including projection effects ]

  Duration
     T90: 187 +/- 21.5870331449229
        Measured from: -138.048000007868
                   to: 48.9519999921322     [s; relative to TRIGTIME]
     T50: 44 +/- 69.1158447825099
        Measured from: -5.04800000786781
                   to: 38.9519999921322     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 39.9519999921322     
                   to: 40.9519999921322     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -152.048000007868     
                   to: 54.9519999921322     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.995077   1.113695   0.723864   0.216974
           0.073628   0.076948   0.068437   0.063416 [error]
 Peak      0.040132   0.043785   0.025482  -0.000746
           0.005668   0.005823   0.005330   0.004441 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100  207.000 -152.048   54.952
T90   187.000 -138.048   48.952
T50    44.000   -5.048   38.952
Peak    1.000   39.952   40.952
 
 
====== 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      -1.658    -0.148      0.146       -           -               -         9.10e-04     -7.74e-05          7.63e-05      40.830   57
CPL     -1.663    -0.589      0.287     9999.360      N/A           N/A         9.08e-04        N/A               N/A         40.850   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      -1.781     -0.295     0.277       -           -               -         6.37e-03     -1.23e-03          1.19e-03      71.130   57
CPL     -1.135     -1.034     1.400       56.561     -48.932       -56.561      1.50e-02     -9.56e-03          8.41e-02      70.060   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  4.66e-07  5.90e-07  1.50e-06  1.75e-06  2.83e-06   erg/cm2
      90%_error_low -3.48e-08 -3.59e-08 -6.91e-08 -3.40e-07 -1.59e-07 -4.04e-07   erg/cm2
      90%_error_hi   3.59e-08  3.59e-08  6.92e-08  4.05e-07  1.61e-07  4.57e-07   erg/cm2
Peak flux       PL   3.44e-01  2.93e-01  1.71e-01  1.48e-01  8.72e-01  9.56e-01   ph/cm2/s
      90%_error_low -7.69e-02 -4.61e-02 -4.22e-02 -6.06e-02 -1.37e-01 -1.55e-01   ph/cm2/s
      90%_error_hi   8.02e-02  4.61e-02  4.30e-02  8.22e-02  1.37e-01  1.57e-01   ph/cm2/s
 
Fluence        CPL   2.79e-07  4.60e-07  5.89e-07  1.84e-06  1.78e-06  2.82e-06   erg/cm2
      90%_error_low -3.49e-08    N/A       N/A       N/A    -1.91e-07 -6.58e-07   erg/cm2
      90%_error_hi   3.59e-08    N/A       N/A       N/A     1.28e-07  4.15e-07   erg/cm2
Peak flux      CPL   3.23e-01  3.17e-01  1.70e-01  6.20e-02  8.51e-01  8.71e-01   ph/cm2/s
      90%_error_low -8.71e-02 -6.21e-02 -5.08e-02 -6.20e-02 -1.41e-01 -1.54e-01   ph/cm2/s
      90%_error_hi   8.75e-02  6.29e-02  4.76e-02  1.11e-01  1.41e-01  1.97e-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
  155.6423    -0.0268   0.0099    20.7989   -76.4775         2.4420073     19.465 TRIG_00146129                 
 
Foreground time interval of the image:
-73.147  54.952 (delta_t = 128.099 [sec])
Background time interval of the image:




    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 -152.048 sec. to   54.952 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.65796     ( -0.148025   0.145915 )
Norm@50keV  : 9.10084E-04    ( -7.7398e-05   7.63475e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          40.83 using 59 PHA bins.
# Reduced chi-squared =         0.7163 for     57 degrees of freedom 
# Null hypothesis probability =   9.477576e-01
 
Photon flux (15-150 keV)    in 207 sec: 0.119153 ( -0.00919  0.009201 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.75094e-06 ( -1.58726e-07  1.61074e-07 ) ergs/cm2
    Cutoff power-law model
    Time interval is from -152.048 sec. to   54.952 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.17765     ( -0.0746556   0.801248 )
Epeak [keV] : 67.9356      (   )
Norm@50keV  : 4.92504E-04    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          40.57 using 59 PHA bins.
# Reduced chi-squared =         0.7244 for     56 degrees of freedom 
# Null hypothesis probability =   9.399471e-01
 
Photon flux (15-150 keV)    in 207 sec: 0.120290 ( -0.010339  0.008053 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.78304e-06 ( -1.91378e-07  1.28401e-07 ) ergs/cm2

    1-s peak spectrum fit

    Power-law model
    Time interval is from   39.952 sec. to   40.952 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.7807     ( -0.295139   0.27725 )
Norm@50keV  : 6.37436E-03    ( -0.001228   0.0011925 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          71.13 using 59 PHA bins.
# Reduced chi-squared =          1.248 for     57 degrees of freedom 
# Null hypothesis probability =   9.878573e-02
 
Photon flux (15-150 keV)    in 1 sec: 0.871932 ( -0.137018  0.137018 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.87368e-08 ( -1.13323e-08  1.17358e-08 ) ergs/cm2
    Cutoff power-law model
    Time interval is from   39.952 sec. to   40.952 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.13475     ( -1.03444   1.4005 )
Epeak [keV] : 56.5608      ( -48.9316 -56.5608 )
Norm@50keV  : 1.49983E-02    ( -0.00955667   0.0840506 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          70.06 using 59 PHA bins.
# Reduced chi-squared =          1.251 for     56 degrees of freedom 
# Null hypothesis probability =   9.805894e-02
 
Photon flux (15-150 keV)    in 1 sec: 0.851414 ( -0.140652  0.1409 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.45884e-08 ( -1.25128e-08  1.34478e-08 ) ergs/cm2

    Time-resolved spectra




    Distribution

    T90 vs. Hardness ratio plot 

    T90                                   = 187.0 sec.
Hardness ratio (energy fluence ratio) = 1.26756404221

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

    S(15-50 keV)  = 7.446976e-07
S(50-150 keV) = 1.0062435e-06

    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 = 8.881739870735185E-02, IMY = 3.693123778236507E-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:

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

    Time interval of the image:
-73.147400 54.952000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.5571 -40.5675    2.3  38.8 -170.3   0.7486   5.1    1.5	Vela X-1                      
170.1517 -60.6468    4.5  45.1  146.4   0.8015   2.5    5.0	Cen X-3                       
134.7994 -64.1533    2.6  54.2  164.7   2.4622   4.5 ------	UNKNOWN                       
201.9929  25.8735    2.3  51.9    4.4   1.5868   5.0 ------	UNKNOWN                       
124.8658 -46.0112    2.6  48.2 -172.2   0.8956   4.4 ------	UNKNOWN                       
155.6422  -0.0268    0.6  20.8  -76.5   2.4408  19.5 ------	UNKNOWN

    Post-slew image of 15-350 keV band 

    Time interval of the image:
-299.048000 302.982500
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.5293 -40.5307    2.2  38.8 -170.3   2.0013   5.3    1.4	Vela X-1                      
169.9306 -60.6494    4.2  45.2  146.6   2.4685   2.7   11.4	Cen X-3                       
187.2392 -23.5969    3.6  18.4   85.6   0.9447   3.2 ------	UNKNOWN                       
155.6105  -0.0109    1.5  20.8  -76.5   2.5744   7.8 ------	UNKNOWN                       
165.4564  23.4044    2.7  39.1  -39.5   1.9134   4.3 ------	UNKNOWN                       
111.2478 -26.7376    5.0  55.2 -145.3   4.8600   2.3 ------	UNKNOWN                       
133.0447   3.8790    3.5  41.1  -98.2   5.8000   3.3 ------	UNKNOWN