Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time: Mon Jan 13 04:58:47 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger519043
======================================================================

  Trigger: 00519043      Segment: 000

  BAT Trigger Time: 354950664   [s; MET]
      Trigger Stop: 354950728   [s; MET]
               UTC: 2012-04-01T05:24:15.946360    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 58.0683562384394   Dec: -17.6710926873154  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.99
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    7.99

  Analysis Position:   [ source = BAT ]
    RA: 58.0683562384394   Dec: -17.6710926873154  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 58.0599105901256   Dec: -17.6604130505279  [deg; J2000]  
        { 03h 52m 14.4s , -17d 39' 37.5" }
         +/- 2.45336160301907 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.07086866224374 [arcmin] (formal 1-sigma fit error)
    SNR: 8.4394888894432
 
  Angular difference between the analysis and refined position is 0.802330 arcmin
 
  Partial Coding Fraction: 1.015625    [ including projection effects ]

  Duration
     T90: 130.271999955177 +/- 24.2292145034795
        Measured from: -87.160000026226
                   to: 43.1119999289513     [s; relative to TRIGTIME]
     T50: 61.0279999375343 +/- 16.2374887320209
        Measured from: -53.3840000033379
                   to: 7.64399993419647     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -92.5199999809265     
                   to: -91.5199999809265     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -92.972000002861     
                   to: 52.716000020504     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.496023   0.687179   0.365543   0.066431
           0.070169   0.072028   0.062911   0.053815 [error]
 Peak     -0.004379   0.031210   0.012487   0.014957
           0.012202   0.012249   0.011504   0.009319 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100  145.688  -92.972   52.716
T90   130.272  -87.160   43.112
T50    61.028  -53.384    7.644
Peak    1.000  -92.520  -91.520
 
 
====== 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      -1.714    -0.234      0.224       -           -               -         6.83e-04     -9.97e-05          9.76e-05      60.780   57
CPL     -1.159    -0.734      1.134       68.502     -42.631       -68.502      1.38e-03     -7.69e-04          4.41e-03      59.700   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      -0.549     -1.124     0.549       -           -               -         3.21e-03     -3.21e-03          2.61e-03      64.530   57
CPL     -0.634     -1.208     0.634     9999.360    -9999.360      -9999.360      3.36e-03     -3.36e-03          1.31e-02      64.550   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   1.56e-07  2.51e-07  3.06e-07  7.32e-07  9.21e-07  1.44e-06   erg/cm2
      90%_error_low -2.96e-08 -3.21e-08 -5.95e-08 -2.54e-07 -1.39e-07 -3.19e-07   erg/cm2
      90%_error_hi   3.07e-08  3.20e-08  5.99e-08  3.30e-07  1.42e-07  3.80e-07   erg/cm2
Peak flux       PL   5.35e-02  9.55e-02  1.31e-01  3.70e-01  3.77e-01  6.50e-01   ph/cm2/s
      90%_error_low -5.35e-02 -9.55e-02 -1.31e-01 -3.70e-01 -3.77e-01 -4.06e-01   ph/cm2/s
      90%_error_hi   1.78e-01  1.37e-01  7.50e-02  1.55e+00  3.00e-01  1.35e+00   ph/cm2/s
 
Fluence        CPL   1.46e-07  2.68e-07  3.07e-07  3.04e-07  8.74e-07  1.03e-06   erg/cm2
      90%_error_low -3.42e-08 -4.22e-08 -6.66e-08 -2.27e-07 -1.56e-07 -2.83e-07   erg/cm2
      90%_error_hi   3.44e-08  4.46e-08  6.49e-08  5.16e-07  1.60e-07  5.59e-07   erg/cm2
Peak flux      CPL   5.56e-02  1.05e-01  1.31e-01  3.78e-01  3.58e-01  6.55e-01   ph/cm2/s
      90%_error_low -5.56e-02     N/A       N/A       N/A   -3.58e-01 -6.55e-01   ph/cm2/s
      90%_error_hi   1.76e-01     N/A       N/A       N/A    2.95e-01  4.67e-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
   58.0599   -17.6604   0.0228     1.7798   141.1757         0.6700607      8.439 TRIG_00519043                 
 
Foreground time interval of the image:
-15.299  52.716 (delta_t =  68.015 [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  -92.972 sec. to   52.716 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.71425     ( -0.233742   0.223931 )
Norm@50keV  : 6.83356E-04    ( -9.97161e-05   9.76324e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.78 using 59 PHA bins.
# Reduced chi-squared =          1.066 for     57 degrees of freedom 
# Null hypothesis probability =   3.414946e-01
 
Photon flux (15-150 keV)    in 145.7 sec: 9.12178E-02 ( -0.0116957  0.0117012 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.21e-07 ( -1.38995e-07  1.41746e-07 ) ergs/cm2
    Cutoff power-law model
    Time interval is from  -92.972 sec. to   52.716 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.15928     ( -0.734385   1.1342 )
Epeak [keV] : 68.5024      ( -42.6302 -68.5012 )
Norm@50keV  : 1.37621E-03    ( -0.000769293   0.00440971 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.70 using 59 PHA bins.
# Reduced chi-squared =          1.066 for     56 degrees of freedom 
# Null hypothesis probability =   3.427219e-01
 
Photon flux (15-150 keV)    in 145.7 sec: 8.92596E-02 ( -0.0121748  0.0121164 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.74076e-07 ( -1.56448e-07  1.60373e-07 ) ergs/cm2

    1-s peak spectrum fit

    Power-law model
    Time interval is from  -92.520 sec. to  -91.520 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.96203     ( -3.63545   -1.96203 )
Norm@50keV  : 1.89357E-04    ( -0.000189359   0.00563589 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          63.89 using 59 PHA bins.
# Reduced chi-squared =          1.121 for     57 degrees of freedom 
# Null hypothesis probability =   2.473120e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.377467 8.26784E-02 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.21172e-08 ( -4.09109e-08  2.28509e-08 ) ergs/cm2
    Cutoff power-law model
    Time interval is from  -92.520 sec. to  -91.520 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.633987     ( -1.21004   0.631716 )
Epeak [keV] : 9999.36      ( -9999.36 -9999.36 )
Norm@50keV  : 3.36095E-03    ( -0.0033917   0.0130404 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.55 using 59 PHA bins.
# Reduced chi-squared =          1.153 for     56 degrees of freedom 
# Null hypothesis probability =   2.025456e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.358160 ( -0.35816  0.294818 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.21609e-08 ( -2.60552e-08  2.61657e-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 = -2.420806499027970E-02, IMY = -1.948067944755112E-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:

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

    Time interval of the image:
-15.299400 52.716000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6360  22.0039    0.9  46.1   26.7   2.7922  12.9    0.7	Crab                          
 58.0600 -17.6604    1.4   1.8  141.2   0.6702   8.4 ------	UNKNOWN                       
 40.0490  35.3535    2.3  54.0  -25.6   1.3322   5.1 ------	UNKNOWN                       
 26.8438  25.1421    2.9  50.7  -44.5   1.7078   4.0 ------	UNKNOWN                       
  9.0267 -29.3182    2.8  45.9 -123.8   1.5104   4.2 ------	UNKNOWN

    Post-slew image of 15-350 keV band 

    Time interval of the image:
101.900600 963.155700
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6403  22.0256    0.4  46.9   12.2  32.6756  31.9    0.8	Crab                          
 98.8681 -20.8270    3.4  38.5   80.5   6.1195   3.4 ------	UNKNOWN                       
 68.4304  17.2293    2.5  36.3   -4.2   2.6854   4.7 ------	UNKNOWN                       
 60.8148  20.8883    3.0  38.6  -16.9   2.1749   3.8 ------	UNKNOWN                       
 19.7623 -19.6071    3.6  36.3 -120.3   2.8430   3.3 ------	UNKNOWN                       
358.7659 -37.8782    6.7  55.2 -145.3   7.0097   1.8 ------	UNKNOWN                       
 38.7043  31.0011    3.0  52.1  -42.2  10.3020   3.9 ------	UNKNOWN                       
  6.5258 -25.2263    2.5  48.3 -129.4   9.2561   4.5 ------	UNKNOWN