Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time: Mon May 25 18:19:02 EDT 2015
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger509337
======================================================================

  Trigger: 00509337      Segment: 000

  BAT Trigger Time: 345107960   [s; MET]
      Trigger Stop: 345108024   [s; MET]
               UTC: 2011-12-09T07:19:12.342960    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 14.362573622164   Dec: -46.8016976759424  [deg; J2000]

     Catalogged Source?: YES
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    22.54
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    22.54

  Analysis Position:   [ source = BAT ]
    RA: 14.362573622164   Dec: -46.8016976759424  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 14.3499054195286   Dec: -46.7991139590406  [deg; J2000]  
        { 00h 57m 24.0s , -46d 47' 56.8" }
         +/- 0.479293136934408 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.116581972297158 [arcmin] (formal 1-sigma fit error)
    SNR: 86.9765877008079
 
  Angular difference between the analysis and refined position is 0.542918 arcmin
 
  Partial Coding Fraction: 1.015625    [ including projection effects ]

  Duration
     T90: 810.96799993515 +/- 52.1094840475323
        Measured from: 23.1440001130104
                   to: 834.112000048161     [s; relative to TRIGTIME]
     T50: 243.275999963284 +/- 16.8582879558111
        Measured from: 172.344000101089
                   to: 415.620000064373     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -64.3840000033379     
                   to: -63.3840000033379     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -66.9520000219345     
                   to: 914.212000012398     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total    17.292129  21.892395  17.291401   4.119940
           0.178111   0.186194   0.167361   0.145194 [error]
 Peak      0.020490   0.060550   0.031330   0.014640
           0.013633   0.013278   0.012589   0.011378 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100  981.164  -66.952  914.212
T90   810.968   23.144  834.112
T50   243.276  172.344  415.620
Peak    1.000  -64.384  -63.384
 
 
====== 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      -1.489    -0.029      0.030       -           -               -         3.92e-03     -5.93e-05          5.92e-05      36.410   57
CPL     -1.447    -0.054      0.121      768.790    -768.790      -768.790      4.08e-03     -8.82e-05          4.81e-04      36.080   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      -1.678     -0.639     0.595       -           -               -         8.18e-03     -2.97e-03          2.85e-03      74.580   57
CPL     -1.502     -0.976     3.736      134.237    -134.227      -134.237      1.02e-02        N/A               N/A         74.600   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   4.85e-06  8.98e-06  1.28e-05  3.85e-05  3.65e-05  6.51e-05   erg/cm2
      90%_error_low -1.65e-07 -1.77e-07 -2.11e-07 -1.52e-06 -5.40e-07 -1.57e-06   erg/cm2
      90%_error_hi   1.68e-07  1.76e-07  2.11e-07  1.57e-06  5.40e-07  1.60e-06   erg/cm2
Peak flux       PL   4.00e-01  3.62e-01  2.26e-01  2.16e-01  1.08e+00  1.20e+00   ph/cm2/s
      90%_error_low -2.05e-01 -1.30e-01 -1.02e-01 -1.45e-01 -3.72e-01 -4.03e-01   ph/cm2/s
      90%_error_hi   2.38e-01  1.26e-01  9.92e-02  2.50e-01  3.75e-01  4.04e-01   ph/cm2/s
 
Fluence        CPL   4.79e-06  8.98e-06  1.28e-05  3.84e-05  3.64e-05  6.32e-05   erg/cm2
      90%_error_low -2.39e-07 -1.77e-07 -1.26e-07 -6.80e-06 -5.96e-07 -4.78e-06   erg/cm2
      90%_error_hi   1.92e-07  1.78e-07  2.56e-07  9.21e-07  5.86e-07  2.34e-06   erg/cm2
Peak flux      CPL   4.00e-01  3.62e-01  2.26e-01  2.15e-01  1.08e+00  1.20e+00   ph/cm2/s
      90%_error_low -2.29e-01 -1.28e-01 -1.02e-01 -2.15e-01 -3.77e-01 -4.03e-01   ph/cm2/s
      90%_error_hi   2.41e-01  1.63e-01  1.12e-01  1.30e-01  3.73e-01  4.03e-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
   14.3499   -46.7991   0.0022     0.0366  -106.8900        57.8054139     86.977 TRIG_00509337                 
 
Foreground time interval of the image:
-16.299 164.560 (delta_t = 180.859 [sec])
166.000 914.212 (delta_t = 748.212 [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
    Multiple GTIs in the spectrum
tstart tstop
-66.952000 164.560000
166.000000 914.212000
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.48925     ( -0.0294588   0.029508 )
Norm@50keV  : 3.91935E-03    ( -5.92695e-05   5.91967e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          36.41 using 59 PHA bins.
# Reduced chi-squared =         0.6387 for     57 degrees of freedom 
# Null hypothesis probability =   9.847144e-01
 
Photon flux (15-150 keV)    in 979.7 sec: 0.487900 ( -0.009007  0.009047 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.64958e-05 ( -5.40468e-07  5.40133e-07 ) ergs/cm2
    Cutoff power-law model
    Multiple GTIs in the spectrum
tstart tstop
-66.952000 164.560000
166.000000 914.212000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.44681     ( -0.0530288   0.121448 )
Epeak [keV] : 768.790      ( -804.187 -804.187 )
Norm@50keV  : 4.08074E-03    ( -8.42759e-05   0.000485428 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          36.08 using 59 PHA bins.
# Reduced chi-squared =         0.6442 for     56 degrees of freedom 
# Null hypothesis probability =   9.822657e-01
 
Photon flux (15-150 keV)    in 979.7 sec: 0.485815 ( -0.010677  0.009966 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.6406e-05 ( -5.96144e-07  5.85555e-07 ) ergs/cm2

    1-s peak spectrum fit

    Power-law model
    Time interval is from  -64.384 sec. to  -63.384 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.67788     ( -0.638697   0.594956 )
Norm@50keV  : 8.18168E-03    ( -0.00297239   0.0028546 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          74.58 using 59 PHA bins.
# Reduced chi-squared =          1.308 for     57 degrees of freedom 
# Null hypothesis probability =   5.901308e-02
 
Photon flux (15-150 keV)    in 1 sec: 1.07840 ( -0.37198  0.37477 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.59067e-08 ( -2.7784e-08  2.84283e-08 ) ergs/cm2
    Cutoff power-law model
    Time interval is from  -64.384 sec. to  -63.384 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.67333     ( -0.956826   3.7552 )
Epeak [keV] : 9988.90      ( -9999.18 -9999.19 )
Norm@50keV  : 8.23187E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          74.58 using 59 PHA bins.
# Reduced chi-squared =          1.332 for     56 degrees of freedom 
# Null hypothesis probability =   4.913705e-02
 
Photon flux (15-150 keV)    in 1 sec: 1.07848 ( -0.376764  0.37323 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.59207e-08 ( -3.20151e-08  2.65336e-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 = -1.855401688589516E-04, IMY = 6.110664473265062E-04

    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:
-16.299410 164.560000
166.000000 914.212000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 59.1157 -41.4584    2.4  32.1  133.3   5.3548   4.8 ------	UNKNOWN                       
114.4612 -56.7569    2.5  57.1  176.2  19.4703   4.6 ------	UNKNOWN                       
115.3314 -59.5268    2.9  55.8  179.2  14.3795   3.9 ------	UNKNOWN                       
 55.8419 -63.9388    2.3  28.4  178.4   3.7535   5.0 ------	UNKNOWN                       
 14.3499 -46.7991    0.1   0.0 -106.9  57.8057  87.0 ------	UNKNOWN                       
125.2951 -65.1611    2.8  56.0 -172.0  11.0640   4.1 ------	UNKNOWN                       
329.6172  -3.0686    2.7  58.4  -19.5  16.1338   4.2 ------	UNKNOWN

    Post-slew image of 15-350 keV band 

    Time interval of the image:
-239.000000 164.560000
166.000000 963.057900
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 59.1179 -41.4696    2.4  32.1  133.3   6.2729   4.9 ------	UNKNOWN                       
349.0415   3.8965    3.6  55.4    4.9  11.8919   3.2 ------	UNKNOWN                       
115.3235 -59.5208    3.0  55.8  179.2  16.6512   3.9 ------	UNKNOWN                       
 55.8509 -63.9284    2.3  28.4  178.4   4.5011   5.1 ------	UNKNOWN                       
 14.3506 -46.8004    0.2   0.0 -108.8  59.6262  75.8 ------	UNKNOWN                       
125.3151 -65.1603    2.9  56.1 -172.0  12.5274   4.0 ------	UNKNOWN                       
329.6091  -3.0697    2.5  58.4  -19.5  19.9374   4.6 ------	UNKNOWN                       
324.3848 -56.5684    3.5  31.7  -90.4   4.6904   3.3 ------	UNKNOWN