Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time: Wed Jan 22 14:22:15 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger224364
======================================================================

  Trigger: 00224364      Segment: 000

  BAT Trigger Time: 177202224.064   [s; MET]
      Trigger Stop: 177202224.32   [s; MET]
               UTC: 2006-08-13T22:50:22.685460    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 111.867644154714   Dec: -29.8505718934776  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.17
     Image Trigger?:     NO
     Rate S/N Ratio:     11.13552872566  [ if not an image trigger ]
     Image S/N Ratio:    7.17

  Analysis Position:   [ source = BAT ]
    RA: 111.867644154714   Dec: -29.8505718934776  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 111.895420587626   Dec: -29.8447083777529  [deg; J2000]  
        { 07h 27m 34.9s , -29d 50' 41.0" }
         +/- 0.592780743820795 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.17084124495797 [arcmin] (formal 1-sigma fit error)
    SNR: 64.2030112804418
 
  Angular difference between the analysis and refined position is 1.487713 arcmin
 
  Partial Coding Fraction: 0.3945312    [ including projection effects ]

  Duration
     T90: 15.9679999947548 +/- 3.38792445600214
        Measured from: 1.1879999935627
                   to: 17.1559999883175     [s; relative to TRIGTIME]
     T50: 4.19200000166893 +/- 0.122441838365293
        Measured from: 3.23199999332428
                   to: 7.42399999499321     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 3.59199997782707     
                   to: 4.59199997782707     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.488000005483627     
                   to: 35.9560000002384     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.801536   2.878787   2.625078   0.715501
           0.047417   0.052366   0.048996   0.037707 [error]
 Peak      0.225097   0.355589   0.387617   0.118508
           0.011392   0.013803   0.014124   0.009795 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100   36.444   -0.488   35.956
T90    15.968    1.188   17.156
T50     4.192    3.232    7.424
Peak    1.000    3.592    4.592
 
 
====== 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: CPL)
 
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      -1.334    -0.042      0.042       -           -               -         1.57e-02     -3.55e-04          3.54e-04      46.260   57
CPL     -1.073    -0.167      0.173      207.517     -59.536       245.679      2.04e-02     -3.05e-03          3.73e-03      39.030   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      -1.123     -0.071     0.071       -           -               -         7.64e-02     -3.08e-03          3.07e-03      42.060   57
CPL     -0.964     -0.209     0.285      378.814    -378.814      -378.814      8.99e-02     -1.72e-02          2.92e-02      41.050   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   6.26e-07  1.27e-06  2.02e-06  7.13e-06  5.61e-06  1.10e-05   erg/cm2
      90%_error_low -2.94e-08 -3.53e-08 -5.17e-08 -4.17e-07 -1.31e-07 -4.40e-07   erg/cm2
      90%_error_hi   3.00e-08  3.52e-08  5.16e-08  4.34e-07  1.31e-07  4.54e-07   erg/cm2
Peak flux       PL   7.00e-04  6.98e-03  7.62e-02  8.58e+00  3.38e-01  8.61e+00   ph/cm2/s
      90%_error_low     N/A       N/A       N/A       N/A       N/A       N/A     ph/cm2/s
      90%_error_hi      N/A       N/A       N/A       N/A       N/A       N/A     ph/cm2/s
 
Fluence        CPL   5.82e-07  1.29e-06  2.08e-06  5.20e-06  5.54e-06  9.15e-06   erg/cm2
      90%_error_low -3.89e-08 -3.71e-08 -6.19e-08 -9.11e-07 -1.39e-07 -9.11e-07   erg/cm2
      90%_error_hi   3.97e-08  3.73e-08  6.24e-08  1.15e-06  1.39e-07  1.14e-06   erg/cm2
Peak flux      CPL   2.10e+00  2.79e+00  2.59e+00  3.48e+00  8.83e+00  1.10e+01   ph/cm2/s
      90%_error_low -2.30e-01 -1.43e-01 -1.42e-01 -8.10e-01 -3.83e-01 -9.12e-01   ph/cm2/s
      90%_error_hi   2.31e-01  1.44e-01  1.44e-01  7.20e-01  3.83e-01  8.79e-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
  111.8954   -29.8447   0.0030    34.2671  -118.4470         7.3591946     64.203 TRIG_00224364                 
 
Foreground time interval of the image:
 -0.488   9.237 (delta_t =   9.725 [sec])
Background time interval of the image:
-239.064  -0.488 (delta_t = 238.576 [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   -0.488 sec. to   35.956 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.33367     ( -0.0415473   0.0416391 )
Norm@50keV  : 1.57149E-02    ( -0.000354465   0.000354309 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.26 using 59 PHA bins.
# Reduced chi-squared =         0.8116 for     57 degrees of freedom 
# Null hypothesis probability =   8.446379e-01
 
Photon flux (15-150 keV)    in 36.44 sec: 1.88697 ( -0.04722  0.04736 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.61446e-06 ( -1.30571e-07  1.30654e-07 ) ergs/cm2
    Cutoff power-law model
    Time interval is from   -0.488 sec. to   35.956 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.07296     ( -0.1669   0.173274 )
Epeak [keV] : 207.517      ( -59.5362 245.679 )
Norm@50keV  : 2.03812E-02    ( -0.00305356   0.0037289 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          39.03 using 59 PHA bins.
# Reduced chi-squared =         0.6970 for     56 degrees of freedom 
# Null hypothesis probability =   9.588205e-01
 
Photon flux (15-150 keV)    in 36.44 sec: 1.85276 ( -0.05141  0.05163 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.54201e-06 ( -1.39345e-07  1.38902e-07 ) ergs/cm2

    1-s peak spectrum fit

    Power-law model
    Time interval is from    3.592 sec. to    4.592 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.12314     ( -0.0707937   0.0710838 )
Norm@50keV  : 7.64427E-02    ( -0.00307536   0.00307305 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          42.06 using 59 PHA bins.
# Reduced chi-squared =         0.7379 for     57 degrees of freedom 
# Null hypothesis probability =   9.306539e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.338185 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.93506e-07 ( -3.47188e-08  3.48175e-08 ) ergs/cm2
    Cutoff power-law model
    Time interval is from    3.592 sec. to    4.592 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.963891     ( -0.208867   0.284603 )
Epeak [keV] : 378.814      ( -378.814 -378.814 )
Norm@50keV  : 8.99115E-02    ( -0.0171548   0.0291723 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          41.05 using 59 PHA bins.
# Reduced chi-squared =         0.7330 for     56 degrees of freedom 
# Null hypothesis probability =   9.329168e-01
 
Photon flux (15-150 keV)    in 1 sec: 8.82780 ( -0.3829  0.3828 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.88824e-07 ( -3.59193e-08  3.58077e-08 ) ergs/cm2

    Time-resolved spectra




    Distribution

    T90 vs. Hardness ratio plot 

    T90                                   = 15.968 sec.
Hardness ratio (energy fluence ratio) = 1.61135036496

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

    S(15-50 keV)  = 1.8701422e-06
S(50-150 keV) = 3.671889e-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 = -3.245400832142962E-01, IMY = 5.990500984735029E-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:
-239.064000 -0.488000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.6911 -40.4968   16.9  32.4  -77.8   0.1760   0.7    8.2	Vela X-1                      
170.5204 -60.4755    6.0  33.9  -23.0   0.3478   1.9   10.7	Cen X-3                       
186.6602 -62.7623    1.0  38.4  -11.8   2.4793  11.8    0.5	GX 301-2                      
 55.8746 -28.2749    2.5  42.7  159.9   1.5427   4.7 ------	UNKNOWN                       
218.5468 -66.6956    2.4  44.5    7.4   1.2899   4.8 ------	UNKNOWN                       
188.6361 -67.8765    3.2  35.8   -4.4   0.7051   3.6 ------	UNKNOWN                       
107.2018 -63.3447    2.9   5.5  -39.1   0.6282   4.1 ------	UNKNOWN                       
198.2402 -45.2448    2.9  56.2  -20.1   2.2596   4.0 ------	UNKNOWN

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

    Time interval of the image:
-0.488000 9.236590
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.4414 -40.3625    0.0  32.4  -78.2   0.1978   1.7   12.2	Vela X-1                      
169.9773 -60.5799    7.7  33.7  -23.1   0.0998   1.5   10.3	Cen X-3                       
186.3610 -62.7052    6.1  38.4  -12.0  -0.1496  -1.9    9.0	GX 301-2                      
 69.8529  -9.5089    2.6  56.0 -175.2   0.8722   4.4 ------	UNKNOWN                       
111.8954 -29.8447    0.2  34.3 -118.4   7.3585  64.2 ------	UNKNOWN

    Post-slew image of 15-350 keV band 

    Time interval of the image:
62.836600 669.636600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6384  22.0279    1.3  58.6 -159.8  20.2927   9.2    0.9	Crab                          
135.5433 -40.5757   12.5  22.0   -3.4  -0.2719  -0.9    1.4	Vela X-1                      
170.3795 -60.5792    7.5  49.0   17.4  -1.2068  -1.5    3.2	Cen X-3                       
 59.8615 -11.8600    2.9  51.3  150.1   5.7949   4.0 ------	UNKNOWN