Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time: Wed Jan 22 22:21:55 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger114797
======================================================================

  Trigger: 00114797      Segment: 000

  BAT Trigger Time: 135383753.6   [s; MET]
      Trigger Stop: 135383754.112   [s; MET]
               UTC: 2005-04-16T22:35:54.119620    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 133.852677933438   Dec: 11.1731175564645  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8
     Image Trigger?:     NO
     Rate S/N Ratio:     25.5734237050888  [ if not an image trigger ]
     Image S/N Ratio:    8

  Analysis Position:   [ source = BAT ]
    RA: 133.852677933438   Dec: 11.1731175564645  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 133.846627138052   Dec: 11.1855187849144  [deg; J2000]  
        { 08h 55m 23.2s , +11d 11' 07.9" }
         +/- 1.35412158570901 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.664201445591195 [arcmin] (formal 1-sigma fit error)
    SNR: 19.7258627463894
 
  Angular difference between the analysis and refined position is 0.824921 arcmin
 
  Partial Coding Fraction: 0.1289062    [ including projection effects ]

  Duration
     T90: 3.39200001955032 +/- 0.63150613607837
        Measured from: 0.187999993562698
                   to: 3.58000001311302     [s; relative to TRIGTIME]
     T50: 1.56000000238419 +/- 0.317238070375656
        Measured from: 0.612000018358231
                   to: 2.17200002074242     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.136000007390976     
                   to: 1.13600000739098     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0.0719999969005585     
                   to: 4.19600000977516     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.263869   0.529920   0.571839   0.070797
           0.033982   0.038636   0.038308   0.035513 [error]
 Peak      0.091406   0.225170   0.284116   0.099091
           0.017504   0.021610   0.023044   0.019741 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100    4.124    0.072    4.196
T90     3.392    0.188    3.580
T50     1.560    0.612    2.172
Peak    1.000    0.136    1.136
 
 
====== 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      -1.330    -0.128      0.128       -           -               -         2.84e-02     -2.17e-03          2.17e-03      73.420   57
CPL     -0.403    -0.585      0.678       95.752     -19.558        67.414      7.56e-02     -3.42e-02          7.46e-02      65.590   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      -0.996     -0.155     0.160       -           -               -         5.28e-02     -5.16e-03          5.12e-03      51.960   57
CPL     -0.538     -0.581     0.727      195.926      N/A           N/A         8.23e-02        N/A               N/A         50.450   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   1.28e-07  2.61e-07  4.14e-07  1.47e-06  1.15e-06  2.27e-06   erg/cm2
      90%_error_low -1.77e-08 -2.28e-08 -3.73e-08 -2.68e-07 -9.38e-08 -2.95e-07   erg/cm2
      90%_error_hi   1.86e-08  2.26e-08  3.71e-08  3.04e-07  9.42e-08  3.23e-07   erg/cm2
Peak flux       PL   2.69e-04  3.31e-03  2.71e-02  3.38e+00  3.57e-02  3.40e+00   ph/cm2/s
      90%_error_low -1.71e-05 -1.98e-04 8.15e-03 -3.13e-01     N/A   -2.97e-01   ph/cm2/s
      90%_error_hi   3.33e-04  3.49e-03  4.29e-02  1.78e+00     N/A    1.84e+00   ph/cm2/s
 
Fluence        CPL   1.03e-07  2.78e-07  4.53e-07  5.42e-07  1.11e-06  1.38e-06   erg/cm2
      90%_error_low -2.24e-08 -2.63e-08 -4.54e-08 -2.25e-07 -1.00e-07 -2.42e-07   erg/cm2
      90%_error_hi   2.34e-08  2.68e-08  4.65e-08  4.31e-07  1.00e-07  4.28e-07   erg/cm2
Peak flux      CPL   1.17e+00  1.86e+00  1.95e+00  2.27e+00  5.99e+00  7.26e+00   ph/cm2/s
      90%_error_low -3.31e-01 -2.43e-01 -2.40e-01 -8.86e-01 -6.15e-01 -1.11e+00   ph/cm2/s
      90%_error_hi   3.56e-01  2.44e-01  2.46e-01  1.32e+00  6.18e-01  1.50e+00   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
  133.8466    11.1855   0.0097    53.1853  -153.1367         1.6237576     19.726 TRIG_00114797                 
 
Foreground time interval of the image:
  0.072   4.196 (delta_t =   4.124 [sec])
Background time interval of the image:
-299.600   0.072 (delta_t = 299.672 [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    0.072 sec. to    4.196 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.33028     ( -0.127776   0.128092 )
Norm@50keV  : 2.84403E-02    ( -0.00217492   0.00217491 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          73.42 using 59 PHA bins.
# Reduced chi-squared =          1.288 for     57 degrees of freedom 
# Null hypothesis probability =   7.048003e-02
 
Photon flux (15-150 keV)    in 4.124 sec: 3.41270 ( -0.27497  0.2758 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.15082e-06 ( -9.3814e-08  9.42326e-08 ) ergs/cm2
    Cutoff power-law model
    Time interval is from    0.072 sec. to    4.196 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.402896     ( -0.585371   0.678166 )
Epeak [keV] : 95.7523      ( -19.5579 67.4138 )
Norm@50keV  : 7.55866E-02    ( -0.0341669   0.0746006 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.59 using 59 PHA bins.
# Reduced chi-squared =          1.171 for     56 degrees of freedom 
# Null hypothesis probability =   1.784104e-01
 
Photon flux (15-150 keV)    in 4.124 sec: 3.27181 ( -0.28841  0.28932 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.10555e-06 ( -1.00474e-07  1.00232e-07 ) ergs/cm2

    1-s peak spectrum fit

    Power-law model
    Time interval is from    0.136 sec. to    1.136 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.995858     ( -0.155413   0.160187 )
Norm@50keV  : 5.27652E-02    ( -0.00515629   0.00511591 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.96 using 59 PHA bins.
# Reduced chi-squared =         0.9117 for     57 degrees of freedom 
# Null hypothesis probability =   6.639769e-01
 
Photon flux (15-150 keV)    in 1 sec: 3.57388E-02 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.71479e-07 ( -5.53004e-08  5.53513e-08 ) ergs/cm2
    Cutoff power-law model
    Time interval is from    0.136 sec. to    1.136 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.538404     ( -0.580679   0.727021 )
Epeak [keV] : 195.926      (   )
Norm@50keV  : 8.22527E-02    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.45 using 59 PHA bins.
# Reduced chi-squared =         0.9008 for     56 degrees of freedom 
# Null hypothesis probability =   6.842977e-01
 
Photon flux (15-150 keV)    in 1 sec: 5.99006 ( -0.61548  0.61802 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.67845e-07 ( -5.65518e-08  5.6249e-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 = -1.191838068794340E+00, IMY = 6.036945848098397E-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:
-299.600000 0.072000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
159.1999 -22.9128    2.4  52.4  153.2   5.3653   4.9 ------	UNKNOWN                       
175.2772  -8.1678    2.5  32.0  143.8   1.5196   4.5 ------	UNKNOWN                       
226.5334  36.1504    2.7  36.3   -4.4   1.3004   4.3 ------	UNKNOWN                       
219.7263  35.0980    2.2  30.7   -5.4   1.3084   5.2 ------	UNKNOWN                       
248.4831  38.8541    2.4  53.9   -5.0   2.7576   4.7 ------	UNKNOWN                       
166.7432  23.1952    2.7  20.3 -141.4   0.8106   4.3 ------	UNKNOWN

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

    Time interval of the image:
0.072000 4.196000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
156.4561 -18.9714    3.0  50.9  158.8   0.2770   3.8 ------	UNKNOWN                       
150.2651   7.6688    1.9  39.3 -165.7   0.1794   6.2 ------	UNKNOWN                       
133.8466  11.1855    0.6  53.2 -153.1   1.6235  19.7 ------	UNKNOWN                       
211.7886  67.3312    2.6  48.6  -49.8   0.4386   4.5 ------	UNKNOWN

    Post-slew image of 15-350 keV band 

    Time interval of the image:
-299.600000 302.400800
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
191.9863 -19.3111    2.6  40.5  113.4   5.2566   4.5 ------	UNKNOWN                       
166.7602  23.2233    3.1  20.2 -141.3   1.1172   3.7 ------	UNKNOWN                       
164.1060  27.1571    3.0  23.1 -131.4   1.3018   3.8 ------	UNKNOWN                       
229.4154  49.9025    2.5  43.2  -23.5   2.4492   4.7 ------	UNKNOWN                       
175.2364  51.9451    3.4  32.6  -76.7   2.0570   3.4 ------	UNKNOWN