Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time: Mon Jan 13 07:13:33 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger512003
======================================================================

  Trigger: 00512003      Segment: 000

  BAT Trigger Time: 348598828.992   [s; MET]
      Trigger Stop: 348598830.016   [s; MET]
               UTC: 2012-01-18T17:00:21.195400    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 124.86615353153   Dec: -7.18171893580232  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.09
     Image Trigger?:     NO
     Rate S/N Ratio:     9.32737905308882  [ if not an image trigger ]
     Image S/N Ratio:    7.09

  Analysis Position:   [ source = BAT ]
    RA: 124.86615353153   Dec: -7.18171893580232  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 124.865649023424   Dec: -7.18247582301905  [deg; J2000]  
        { 08h 19m 27.8s , -07d 10' 56.9" }
         +/- 1.16587307657909 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.363228600514425 [arcmin] (formal 1-sigma fit error)
    SNR: 24.4288079513759
 
  Angular difference between the analysis and refined position is 0.054446 arcmin
 
  Partial Coding Fraction: 0.4023438    [ including projection effects ]

  Duration
     T90: 20.3039999604225 +/- 2.69527737315058
        Measured from: 1.19200003147125
                   to: 21.4959999918938     [s; relative to TRIGTIME]
     T50: 9.48399990797043 +/- 1.35020593564578
        Measured from: 5.64000004529953
                   to: 15.12399995327     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 6.68800002336502     
                   to: 7.68800002336502     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -1.94400000572205     
                   to: 27.4520000219345     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.141019   1.242310   0.617792   0.146510
           0.053204   0.055360   0.047899   0.040806 [error]
 Peak      0.084909   0.100161   0.046212   0.017445
           0.010752   0.011454   0.009655   0.007657 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100   29.396   -1.944   27.452
T90    20.304    1.192   21.496
T50     9.484    5.640   15.124
Peak    1.000    6.688    7.688
 
 
====== 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      -2.070    -0.108      0.106       -           -               -         6.44e-03     -4.31e-04          4.26e-04      43.830   57
CPL     -1.593    -0.423      0.481       36.891     -27.824        11.839      1.19e-02     -4.90e-03          1.01e-02      40.170   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      -1.899     -0.241     0.228       -           -               -         1.51e-02     -2.42e-03          2.36e-03      65.640   57
CPL     -1.444     -0.738     1.431       51.046      N/A           N/A         2.78e-02        N/A               N/A         65.120   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   4.14e-07  5.38e-07  5.13e-07  8.66e-07  1.75e-06  2.33e-06   erg/cm2
      90%_error_low -3.42e-08 -2.94e-08 -4.72e-08 -1.51e-07 -1.08e-07 -2.03e-07   erg/cm2
      90%_error_hi   3.50e-08  2.94e-08  4.77e-08  1.72e-07  1.09e-07  2.17e-07   erg/cm2
Peak flux       PL   9.10e-01  7.24e-01  3.88e-01  3.03e-01  2.16e+00  2.33e+00   ph/cm2/s
      90%_error_low -1.72e-01 -9.61e-02 -7.99e-02 -1.05e-01 -2.88e-01 -3.12e-01   ph/cm2/s
      90%_error_hi   1.77e-01  9.61e-02  8.03e-02  1.33e-01  2.88e-01  3.13e-01   ph/cm2/s
 
Fluence        CPL   3.92e-07  5.66e-07  5.06e-07  3.97e-07  1.67e-06  1.86e-06   erg/cm2
      90%_error_low -3.96e-08 -3.82e-08 -5.29e-08 -1.90e-07 -1.27e-07 -2.35e-07   erg/cm2
      90%_error_hi   4.00e-08  3.90e-08  5.16e-08  3.94e-07  1.29e-07  4.11e-07   erg/cm2
Peak flux      CPL   8.78e-01  7.69e-01  3.88e-01  1.59e-01  2.14e+00  2.19e+00   ph/cm2/s
      90%_error_low -1.94e-01 -1.99e-01 -9.74e-02 -1.59e-01 -2.96e-01 -3.37e-01   ph/cm2/s
      90%_error_hi   1.92e-01  1.51e-01  8.70e-02  1.81e-01  2.94e-01  3.80e-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
  124.8656    -7.1825   0.0079    35.5778    31.7859         1.9275449     24.429 TRIG_00512003                 
 
Foreground time interval of the image:
 -1.944  11.709 (delta_t =  13.653 [sec])
Background time interval of the image:
-239.992  -1.944 (delta_t = 238.048 [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   -1.944 sec. to   27.452 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.06997     ( -0.1084   0.10555 )
Norm@50keV  : 6.43528E-03    ( -0.00043143   0.000426282 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.83 using 59 PHA bins.
# Reduced chi-squared =         0.7689 for     57 degrees of freedom 
# Null hypothesis probability =   8.997743e-01
 
Photon flux (15-150 keV)    in 29.4 sec: 0.997772 ( -0.056143  0.056228 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.75342e-06 ( -1.08116e-07  1.09037e-07 ) ergs/cm2
    Cutoff power-law model
    Time interval is from   -1.944 sec. to   27.452 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.593     ( -0.422657   0.481261 )
Epeak [keV] : 36.8910      ( -27.8237 11.8392 )
Norm@50keV  : 1.18858E-02    ( -0.00490403   0.0100584 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          40.17 using 59 PHA bins.
# Reduced chi-squared =         0.7173 for     56 degrees of freedom 
# Null hypothesis probability =   9.453502e-01
 
Photon flux (15-150 keV)    in 29.4 sec: 0.973227 ( -0.060144  0.060163 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.6742e-06 ( -1.26855e-07  1.28599e-07 ) ergs/cm2

    1-s peak spectrum fit

    Power-law model
    Time interval is from    6.688 sec. to    7.688 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.89927     ( -0.241273   0.227833 )
Norm@50keV  : 1.50556E-02    ( -0.00241963   0.00235627 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.64 using 59 PHA bins.
# Reduced chi-squared =          1.152 for     57 degrees of freedom 
# Null hypothesis probability =   2.022423e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.16010 ( -0.28785  0.28791 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.38439e-07 ( -2.15725e-08  2.19409e-08 ) ergs/cm2
    Cutoff power-law model
    Time interval is from    6.688 sec. to    7.688 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.44376     ( -0.739266   1.4291 )
Epeak [keV] : 51.0456      (   )
Norm@50keV  : 2.78018E-02    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.12 using 59 PHA bins.
# Reduced chi-squared =          1.163 for     56 degrees of freedom 
# Null hypothesis probability =   1.891218e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.13556 ( -0.29623  0.29416 ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

    Time-resolved spectra




    Distribution

    T90 vs. Hardness ratio plot 

    T90                                   = 20.304 sec.
Hardness ratio (energy fluence ratio) = 0.952686649797

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

    S(15-50 keV)  = 9.520128e-07
S(50-150 keV) = 8.01408e-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 = 6.080588210922173E-01, IMY = -3.768046190414206E-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:
-239.992000 -1.944000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
115.9989  -8.2972    3.2  42.8   39.8   1.9666   3.7 ------	UNKNOWN                       
136.8921 -12.7111    3.1  33.6    8.9   0.9909   3.8 ------	UNKNOWN                       
208.4467  61.2118    3.5  59.0 -166.2   4.5564   3.3 ------	UNKNOWN                       
177.9807 -21.0021    3.5  47.8  -50.9   3.4769   3.3 ------	UNKNOWN                       
190.1874   6.4477    3.7  40.8  -93.2   3.5408   3.1 ------	UNKNOWN                       
191.9887  10.5197    2.9  41.2  -99.9   4.8462   4.1 ------	UNKNOWN

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

    Time interval of the image:
-1.944000 11.708590
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
108.5082  13.5794    2.8  40.2   74.8   0.7525   4.1 ------	UNKNOWN                       
124.8656  -7.1825    0.5  35.6   31.8   1.9275  24.4 ------	UNKNOWN

    Post-slew image of 15-350 keV band 

    Time interval of the image:
94.308600 782.086500
900.008000 962.069600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.5393 -40.6123    2.8  34.8  -94.6   4.8162   4.1    3.5	Vela X-1                      
 85.9492 -16.9227    3.5  39.2   -8.4   1.9037   3.3 ------	UNKNOWN                       
 66.8911 -20.0667    3.4  57.5   -9.6   6.7066   3.4 ------	UNKNOWN