Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time: Fri Jan 17 19:21:12 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger416103
======================================================================

  Trigger: 00416103      Segment: 000

  BAT Trigger Time: 290419302.592   [s; MET]
      Trigger Stop: 290419303.104   [s; MET]
               UTC: 2010-03-16T08:01:36.973480    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 163.498053786508   Dec: -45.4800063072237  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9.1
     Image Trigger?:     NO
     Rate S/N Ratio:     15.4272486205415  [ if not an image trigger ]
     Image S/N Ratio:    9.1

  Analysis Position:   [ source = BAT ]
    RA: 163.498053786508   Dec: -45.4800063072237  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 163.500282431312   Dec: -45.4619020752741  [deg; J2000]  
        { 10h 54m 00.1s , -45d 27' 42.8" }
         +/- 1.37614186376872 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.646877845852614 [arcmin] (formal 1-sigma fit error)
    SNR: 19.2764956479929
 
  Angular difference between the analysis and refined position is 1.090294 arcmin
 
  Partial Coding Fraction: 0.8359375    [ including projection effects ]

  Duration
     T90: 3.83599996566772 +/- 0.425807452076879
        Measured from: -0.10400003194809
                   to: 3.73199993371964     [s; relative to TRIGTIME]
     T50: 2.27199995517731 +/- 0.342344884065314
        Measured from: 0.363999962806702
                   to: 2.63599991798401     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.107999980449677     
                   to: 0.892000019550323     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.283999979496002     
                   to: 4.11199998855591     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.173690   0.166296   0.067191   0.009419
           0.012627   0.012446   0.010372   0.008666 [error]
 Peak      0.062221   0.061344   0.030139   0.006894
           0.006378   0.006277   0.005182   0.004263 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100    4.396   -0.284    4.112
T90     3.836   -0.104    3.732
T50     2.272    0.364    2.636
Peak    1.000   -0.108    0.892
 
 
====== 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      -2.272    -0.190      0.179       -           -               -         4.75e-03     -6.11e-04          6.01e-04      41.560   57
CPL     -1.798    -0.200      0.914       16.307      N/A           N/A         9.20e-03        N/A               N/A         40.350   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      -2.149     -0.229     0.214       -           -               -         8.29e-03     -1.30e-03          1.27e-03      57.400   57
CPL     -1.477     -0.673     1.017       31.445      N/A           N/A         2.07e-02        N/A               N/A         55.530   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   5.53e-08  6.38e-08  5.28e-08  7.35e-08  1.98e-07  2.45e-07   erg/cm2
      90%_error_low -6.59e-09 -5.88e-09 -9.18e-09 -2.22e-08 -2.09e-08 -3.45e-08   erg/cm2
      90%_error_hi   6.71e-09  5.84e-09  9.53e-09  2.81e-08  2.15e-08  3.88e-08   erg/cm2
Peak flux       PL   6.39e-01  4.39e-01  1.98e-01  1.24e-01  1.34e+00  1.40e+00   ph/cm2/s
      90%_error_low -9.83e-02 -5.05e-02 -4.02e-02 -4.19e-02 -1.51e-01 -1.59e-01   ph/cm2/s
      90%_error_hi   1.01e-01  5.04e-02  4.14e-02  5.35e-02  1.51e-01  1.60e-01   ph/cm2/s
 
Fluence        CPL    N/A      N/A      N/A      N/A      N/A      N/A      erg/cm2
      90%_error_low -6.59e-09 -5.88e-09 -9.18e-09 -2.22e-08 -2.09e-08 -3.45e-08   erg/cm2
      90%_error_hi   6.71e-09  5.84e-09  9.53e-09  2.81e-08  2.15e-08  3.88e-08   erg/cm2
Peak flux      CPL   6.04e-01  4.74e-01  1.93e-01  5.03e-02  1.31e+00  1.32e+00   ph/cm2/s
      90%_error_low -1.11e-01 -6.57e-02 -4.70e-02 -5.03e-02 -1.55e-01 -1.62e-01   ph/cm2/s
      90%_error_hi   1.11e-01  6.84e-02  4.55e-02  1.09e-01  1.55e-01  1.76e-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
  163.5003   -45.4619   0.0099    14.4243    83.1554         0.4224468     19.276 TRIG_00416103                 
 
Foreground time interval of the image:
 -0.284   4.112 (delta_t =   4.396 [sec])
Background time interval of the image:
-239.592  -0.284 (delta_t = 239.308 [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   -0.284 sec. to    4.112 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.27155     ( -0.18958   0.17886 )
Norm@50keV  : 4.74712E-03    ( -0.000611198   0.000600598 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          41.56 using 59 PHA bins.
# Reduced chi-squared =         0.7291 for     57 degrees of freedom 
# Null hypothesis probability =   9.380525e-01
 
Photon flux (15-150 keV)    in 4.396 sec: 0.816764 ( -0.071889  0.071908 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.98453e-07 ( -2.09451e-08  2.14533e-08 ) ergs/cm2
    Cutoff power-law model
    Time interval is from   -0.284 sec. to    4.112 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.79845     ( -0.201724   0.912424 )
Epeak [keV] : 16.3072      (   )
Norm@50keV  : 9.20053E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          40.35 using 59 PHA bins.
# Reduced chi-squared =         0.7206 for     56 degrees of freedom 
# Null hypothesis probability =   9.429018e-01
 
Photon flux (15-150 keV)    in 4.396 sec: 0.815617 ( -0.071539  0.073982 ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

    1-s peak spectrum fit

    Power-law model
    Time interval is from   -0.108 sec. to    0.892 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.14877     ( -0.229351   0.213611 )
Norm@50keV  : 8.29201E-03    ( -0.00130349   0.00127251 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.40 using 59 PHA bins.
# Reduced chi-squared =          1.007 for     57 degrees of freedom 
# Null hypothesis probability =   4.602142e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.33697 ( -0.15122  0.15124 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.74622e-08 ( -1.06047e-08  1.08702e-08 ) ergs/cm2
    Cutoff power-law model
    Time interval is from   -0.108 sec. to    0.892 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.47744     ( -0.673088   1.01696 )
Epeak [keV] : 31.4446      (   )
Norm@50keV  : 2.06554E-02    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.53 using 59 PHA bins.
# Reduced chi-squared =         0.9917 for     56 degrees of freedom 
# Null hypothesis probability =   4.924833e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.30788 ( -0.15491  0.15513 ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

    Time-resolved spectra




    Distribution

    T90 vs. Hardness ratio plot 

    T90                                   = 3.836 sec.
Hardness ratio (energy fluence ratio) = 0.828476664855

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

    S(15-50 keV)  = 1.1904904e-07
S(50-150 keV) = 7.940562e-08

    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 = 3.065326062637548E-02, IMY = -2.553761083342893E-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:
-239.592000 -0.284000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.5303 -40.5448    0.4  25.6   27.3   4.9623  25.7    0.6	Vela X-1                      
169.9938 -60.7647    0.0   3.8 -172.9   0.2377   1.5   12.7	Cen X-3                       
186.6229 -62.7737    0.5  11.8 -165.1   4.0610  22.3    1.0	GX 301-2                      
264.7129 -44.3330    5.6  58.1 -155.1   3.0020   2.1    7.1	4U 1735-44                    
114.7716 -21.3307    2.3  51.0   17.9   2.8542   5.0 ------	UNKNOWN                       
237.6996 -33.6275    3.1  54.1  177.0   2.2608   3.7 ------	UNKNOWN                       
255.7179 -48.7995    1.5  50.8 -157.7   3.7419   7.5 ------	UNKNOWN                       
295.3648 -71.6873    2.6  44.4 -118.8   3.7741   4.5 ------	UNKNOWN

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

    Time interval of the image:
-0.284000 4.112000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.5107 -40.6540    3.6  25.5   27.2  -0.0789  -3.2    6.0	Vela X-1                      
169.9938 -60.7647    0.0   3.8 -172.9  -0.0414  -2.1   12.7	Cen X-3                       
186.9093 -62.5972  125.8  12.0 -166.0   0.0017   0.1   12.5	GX 301-2                      
264.8621 -44.5968    5.9  57.9 -154.8  -0.2478  -2.0   10.2	4U 1735-44                    
163.5003 -45.4619    0.6  14.4   83.2   0.4223  19.3 ------	UNKNOWN

    Post-slew image of 15-350 keV band 

    Time interval of the image:
48.308590 962.468000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.5315 -40.5493    0.3  20.9  -12.9  20.0855  39.4    0.4	Vela X-1                      
170.2958 -60.6269   88.7  15.7 -119.1   0.0683   0.1    0.6	Cen X-3                       
186.6527 -62.7656    0.3  21.7 -135.7  18.9176  40.8    0.3	GX 301-2                      
153.8941 -34.0704    2.9  13.6   37.4   1.7937   3.9 ------	UNKNOWN                       
217.2620 -55.0724    2.7  34.7 -160.8   2.4512   4.3 ------	UNKNOWN                       
 90.8343 -60.9157    5.4  43.5  -64.2   6.4081   2.1 ------	UNKNOWN                       
 89.4517 -52.3189    5.1  47.0  -53.1   6.0110   2.3 ------	UNKNOWN                       
 99.4057 -79.8399    3.3  40.9  -92.6   9.7591   3.5 ------	UNKNOWN