Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time: Wed Jan 22 22:11:01 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger116116
======================================================================

  Trigger: 00116116      Segment: 000

  BAT Trigger Time: 136718739.968   [s; MET]
      Trigger Stop: 136718740.992   [s; MET]
               UTC: 2005-05-02T09:25:40.464300    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 142.543472204572   Dec: 17.0020387304849  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    13
     Image Trigger?:     NO
     Rate S/N Ratio:     32.9089653438087  [ if not an image trigger ]
     Image S/N Ratio:    13

  Analysis Position:   [ source = BAT ]
    RA: 142.543472204572   Dec: 17.0020387304849  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 142.537400023554   Dec: 16.9864502831092  [deg; J2000]  
        { 09h 30m 09.0s , +16d 59' 11.2" }
         +/- 1.26942694326377 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.438417757488495 [arcmin] (formal 1-sigma fit error)
    SNR: 21.6325324092746
 
  Angular difference between the analysis and refined position is 0.998097 arcmin
 
  Partial Coding Fraction: 0.9921875    [ including projection effects ]

  Duration
     T90: 17.7240000069141 +/- 1.90099870011111
        Measured from: -15.8840000033379
                   to: 1.84000000357628     [s; relative to TRIGTIME]
     T50: 9.50000002980232 +/- 5.3902578899044
        Measured from: -8.87200000882149
                   to: 0.628000020980835     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.215999990701675     
                   to: 1.21599999070168     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -17.3199999928474     
                   to: 3.16800001263618     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.252312   0.317416   0.212320   0.039915
           0.020083   0.021213   0.018444   0.015944 [error]
 Peak      0.047259   0.075065   0.057560   0.012447
           0.004849   0.005578   0.004904   0.003714 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100   20.488  -17.320    3.168
T90    17.724  -15.884    1.840
T50     9.500   -8.872    0.628
Peak    1.000    0.216    1.216
 
 
====== 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      -1.583    -0.135      0.133       -           -               -         2.46e-03     -2.01e-04          1.99e-04      67.380   57
CPL     -1.154    -0.487      0.621       89.823     -29.951       -89.823      4.21e-03     -1.87e-03          4.86e-03      65.610   56
 
 
=== 1-s peak 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      -1.354     -0.133     0.132       -           -               -         1.19e-02     -1.01e-03          1.01e-03      70.330   57
CPL     -0.109     -0.655     0.776       73.707     -12.551        30.156      5.29e-02     -2.83e-02          7.81e-02      58.430   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   6.95e-08  1.21e-07  1.62e-07  4.43e-07  4.72e-07  7.96e-07   erg/cm2
      90%_error_low -8.27e-09 -9.24e-09 -1.77e-08 -9.30e-08 -4.18e-08 -1.10e-07   erg/cm2
      90%_error_hi   8.48e-09  9.24e-09  1.77e-08  1.09e-07  4.23e-08  1.23e-07   erg/cm2
Peak flux       PL   4.28e-01  4.69e-01  3.67e-01  4.73e-01  1.44e+00  1.74e+00   ph/cm2/s
      90%_error_low -5.75e-02 -4.16e-02 -3.79e-02 -9.01e-02 -1.21e-01 -1.52e-01   ph/cm2/s
      90%_error_hi   5.95e-02  4.14e-02  3.77e-02  1.02e-01  1.21e-01  1.53e-01   ph/cm2/s
 
Fluence        CPL   6.61e-08  1.28e-07  1.63e-07  2.15e-07  4.51e-07  5.72e-07   erg/cm2
      90%_error_low -9.50e-09 -1.22e-08 -1.91e-08 -1.21e-07 -4.95e-08 -1.32e-07   erg/cm2
      90%_error_hi   9.53e-09  1.26e-08  1.89e-08  2.60e-07  5.01e-08  2.68e-07   erg/cm2
Peak flux      CPL   3.52e-01  5.34e-01  4.00e-01  1.42e-01  1.39e+00  1.43e+00   ph/cm2/s
      90%_error_low -6.92e-02 -5.45e-02 -4.53e-02 -6.45e-02 -1.24e-01 -1.40e-01   ph/cm2/s
      90%_error_hi   7.06e-02  5.63e-02  4.58e-02  1.11e-01  1.24e-01  1.54e-01   ph/cm2/s
 
======================================================================




Image

Pre-slew 15.0-350.0 keV image (Event data)

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  142.5374    16.9865   0.0088    10.2093    38.5000         0.8448116     21.633 TRIG_00116116                 
 
Foreground time interval of the image:
-17.320   3.168 (delta_t =  20.488 [sec])
Background time interval of the image:
-299.968 -17.320 (delta_t = 282.648 [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  -17.320 sec. to    3.168 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.58317     ( -0.134791   0.132983 )
Norm@50keV  : 2.45857E-03    ( -0.000200524   0.000198706 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.38 using 59 PHA bins.
# Reduced chi-squared =          1.182 for     57 degrees of freedom 
# Null hypothesis probability =   1.634283e-01
 
Photon flux (15-150 keV)    in 20.49 sec: 0.314323 ( -0.023752  0.023761 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.72184e-07 ( -4.17742e-08  4.23239e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  -17.320 sec. to    3.168 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.15401     ( -0.486662   0.621238 )
Epeak [keV] : 89.8226      ( -30.0036 -89.8753 )
Norm@50keV  : 4.21130E-03    ( -0.00186326   0.00485856 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.61 using 59 PHA bins.
# Reduced chi-squared =          1.172 for     56 degrees of freedom 
# Null hypothesis probability =   1.780315e-01
 
Photon flux (15-150 keV)    in 20.49 sec: 0.308445 ( -0.024991  0.024878 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.50622e-07 ( -4.95506e-08  5.01405e-08 ) ergs/cm2
 

1-s peak spectrum fit

Power-law model
Time interval is from    0.216 sec. to    1.216 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.35407     ( -0.132486   0.131941 )
Norm@50keV  : 1.19472E-02    ( -0.00101446   0.00101174 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          70.33 using 59 PHA bins.
# Reduced chi-squared =          1.234 for     57 degrees of freedom 
# Null hypothesis probability =   1.104991e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.44053 ( -0.1205  0.12054 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.16592e-07 ( -1.1027e-08  1.11342e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.216 sec. to    1.216 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.109373     ( -0.654802   0.775889 )
Epeak [keV] : 73.7072      ( -12.5507 30.1559 )
Norm@50keV  : 5.29134E-02    ( -0.0283114   0.0781048 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.43 using 59 PHA bins.
# Reduced chi-squared =          1.043 for     56 degrees of freedom 
# Null hypothesis probability =   3.860819e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.38985 ( -0.12413  0.12379 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.06429e-07 ( -1.19946e-08  1.2279e-08 ) ergs/cm2
 

Time-resolved spectra




Distribution

T90 vs. Hardness ratio plot

T90                                   = 17.724 sec.
Hardness ratio (energy fluence ratio) = 1.33505747883

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

S(15-50 keV)  = 1.9101997e-07
S(50-150 keV) = 2.811664e-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 = 1.409441176548823E-01, IMY = -1.121119001801637E-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:
-299.968000 -17.320000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.3852 -40.5534    4.6  51.8  162.6   1.5263   2.5    6.5	Vela X-1                      
161.9339  39.9360    3.1  38.0   20.0   0.9038   3.7 ------	UNKNOWN                       
115.3975  53.6268    3.0  44.9  -31.3   1.2574   3.8 ------	UNKNOWN                       
 95.8418 -21.8145    2.6  49.8 -147.4   1.9756   4.5 ------	UNKNOWN                       
 94.1095  27.0195    2.3  40.5  -77.1   3.2388   5.1 ------	UNKNOWN                       

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

Time interval of the image:
-17.320000 3.168000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.6237 -40.4591    6.5  51.7  162.4  -0.2704  -1.8    7.2	Vela X-1                      
181.2505  38.9769    2.2  50.3   32.1   1.0318   5.2 ------	UNKNOWN                       
142.5378  16.9871    0.5  10.2   38.5   0.8469  21.7 ------	UNKNOWN                       
158.1981  59.8785    2.3  51.9   -0.7   0.5358   4.9 ------	UNKNOWN                       
105.1813 -21.6395    2.0  43.2 -155.3   0.3976   5.9 ------	UNKNOWN                       

Post-slew image of 15-350 keV band

Time interval of the image:
46.732600 302.103700
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
177.5136  62.6326    2.7  51.7    1.0   1.6540   4.2 ------	UNKNOWN                       
155.8437  51.2167    2.4  35.8   -4.4   0.9913   4.7 ------	UNKNOWN                       
118.0464 -36.6369    3.0  58.4 -175.7   3.8454   3.9 ------	UNKNOWN                       
108.1286 -15.1749    3.2  46.8 -150.2   1.2351   3.6 ------	UNKNOWN                       
107.9581   5.2947    3.1  35.8 -123.7   0.9156   3.7 ------	UNKNOWN                       
128.9815  75.4337    2.9  58.9  -22.6   4.1709   4.0 ------	UNKNOWN