Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time: Sun May 10 04:08:53 EDT 2015
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger383063
======================================================================

  Trigger: 00383063      Segment: 000

  BAT Trigger Time: 285618331.2   [s; MET]
      Trigger Stop: 285618333.248   [s; MET]
               UTC: 2010-01-19T18:25:25.746880    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 299.32651470397   Dec: -53.1602425157852  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9.61
     Image Trigger?:     NO
     Rate S/N Ratio:     40.8900966005217  [ if not an image trigger ]
     Image S/N Ratio:    9.61

  Analysis Position:   [ source = BAT ]
    RA: 299.32651470397   Dec: -53.1602425157852  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 299.306782100349   Dec: -53.1499545257311  [deg; J2000]  
        { 19h 57m 13.6s , -53d 08' 59.8" }
         +/- 1.17498692782387 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.467082704780608 [arcmin] (formal 1-sigma fit error)
    SNR: 24.1585679621471
 
  Angular difference between the analysis and refined position is 0.940786 arcmin
 
  Partial Coding Fraction: 0.07617188    [ including projection effects ]

  Duration
     T90: 23.0679998993874 +/- 3.22292846748935
        Measured from: -9.27599996328354
                   to: 13.7919999361038     [s; relative to TRIGTIME]
     T50: 12.4119999408722 +/- 0.773749343250594
        Measured from: -4.10799998044968
                   to: 8.30399996042252     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 2.12000000476837     
                   to: 3.12000000476837     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -15.7599999904633     
                   to: 15.4520000219345     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     2.674249   5.626869   6.445211   3.029499
           0.157125   0.187296   0.190270   0.172979 [error]
 Peak      0.116750   0.245954   0.418324   0.210456
           0.030647   0.036639   0.042165   0.037190 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100   31.212  -15.760   15.452
T90    23.068   -9.276   13.792
T50    12.412   -4.108    8.304
Peak    1.000    2.120    3.120
 
 
====== 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: 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      -1.011    -0.062      0.063       -           -               -         4.11e-02     -1.48e-03          1.47e-03      67.540   57
CPL     -0.936    -0.101      0.249      877.049    -877.049      -877.049      4.42e-02     -1.68e-03          1.14e-02      67.260   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      -0.652     -0.229     0.246       -           -               -         6.51e-02     -9.49e-03          9.15e-03      57.120   57
CPL     -0.643     -0.231     0.249     10000.000    -10000.000      -10000.000      6.56e-02     -9.53e-03          7.90e-03      57.140   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   1.04e-06  2.58e-06  5.12e-06  2.53e-05  1.38e-05  3.40e-05   erg/cm2
      90%_error_low -7.93e-08 -1.19e-07 -1.85e-07 -2.10e-06 -4.90e-07 -2.17e-06   erg/cm2
      90%_error_hi   8.18e-08  1.18e-07  1.85e-07  2.24e-06  4.90e-07  2.28e-06   erg/cm2
Peak flux       PL   1.97e-03  2.04e-02  1.92e-01  1.21e+01  7.95e-01  1.23e+01   ph/cm2/s
      90%_error_low -1.50e-03 -1.47e-02 -1.27e-01 -1.21e+01 -5.02e-01 -1.23e+01   ph/cm2/s
      90%_error_hi   2.35e-03  2.00e-02  1.49e-01  5.83e+00  5.50e-01  6.00e+00   ph/cm2/s
 
Fluence        CPL   1.02e-06  2.59e-06  5.17e-06  2.31e-05  1.38e-05  3.19e-05   erg/cm2
      90%_error_low -1.06e-07 -1.05e-07 -2.20e-07 -5.71e-06 -4.98e-07 -5.65e-06   erg/cm2
      90%_error_hi   8.92e-08  1.22e-07  2.40e-07  1.53e-06  4.91e-07  2.80e-06   erg/cm2
Peak flux      CPL   1.19e+00  2.01e+00  2.54e+00  6.99e+00  7.59e+00  1.26e+01   ph/cm2/s
      90%_error_low     N/A   -4.73e-01     N/A       N/A   -1.26e+00 -3.55e+00   ph/cm2/s
      90%_error_hi      N/A    4.56e-01     N/A       N/A    1.19e+00  1.62e+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
  299.3068   -53.1500   0.0080    48.7835  -134.6594        19.4482090     24.159 TRIG_00383063                 
 
Foreground time interval of the image:
-15.760  15.452 (delta_t =  31.212 [sec])
Background time interval of the image:
-179.200 -15.760 (delta_t = 163.440 [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  -15.760 sec. to   15.452 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.01102     ( -0.0622624   0.0629294 )
Norm@50keV  : 4.11139E-02    ( -0.00148044   0.00147483 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.54 using 59 PHA bins.
# Reduced chi-squared =          1.185 for     57 degrees of freedom 
# Null hypothesis probability =   1.600924e-01
 
Photon flux (15-150 keV)    in 31.21 sec: 0.155307 0.164523 0.144737 0.126527 0.110773 9.72879E-02 8.58570E-02 7.62477E-02 6.82233E-02 6.15541E-02 5.60265E-02 5.14490E-02 4.76544E-02 4.45010E-02 4.18706E-02 3.96660E-02 3.78083E-02 3.62337E-02 3.48909E-02 3.37387E-02 3.27440E-02 3.18801E-02 3.11254E-02 3.04625E-02 2.98770E-02 2.93573E-02 2.88938E-02 2.84785E-02 2.81049E-02 2.77674E-02 2.74613E-02 2.71828E-02 2.69285E-02 2.66955E-02 2.64815E-02 2.61032E-02 2.57786E-02 2.54974E-02 2.52518E-02 2.48457E-02 2.18913E-02 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.3823e-05 ( -4.89548e-07  4.90396e-07 ) ergs/cm2
    Cutoff power-law model
    Time interval is from  -15.760 sec. to   15.452 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.93553     ( -0.100726   0.249411 )
Epeak [keV] : 877.049      ( -877.05 -877.05 )
Norm@50keV  : 4.41586E-02    ( -0.0016783   0.011376 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.26 using 59 PHA bins.
# Reduced chi-squared =          1.201 for     56 degrees of freedom 
# Null hypothesis probability =   1.441371e-01
 
Photon flux (15-150 keV)    in 31.21 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.37973e-05 ( -4.98446e-07  4.91448e-07 ) ergs/cm2

    1-s peak spectrum fit

    Power-law model
    Time interval is from    2.120 sec. to    3.120 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.652143     ( -0.229083   0.246187 )
Norm@50keV  : 6.50581E-02    ( -0.00949041   0.00914798 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.12 using 59 PHA bins.
# Reduced chi-squared =          1.002 for     57 degrees of freedom 
# Null hypothesis probability =   4.707830e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.794778 ( -0.502035  0.550462 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.11802e-07 ( -1.01374e-07  1.01386e-07 ) ergs/cm2
    Cutoff power-law model
    Time interval is from    2.120 sec. to    3.120 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.643392     ( -0.231394   0.248633 )
Epeak [keV] : 1.00000E+04      ( -10000 -10000 )
Norm@50keV  : 6.55809E-02    ( -0.0095281   0.00790447 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.14 using 59 PHA bins.
# Reduced chi-squared =          1.020 for     56 degrees of freedom 
# Null hypothesis probability =   4.323940e-01
 
Photon flux (15-150 keV)    in 1 sec: 7.59124 ( -1.25987  1.18535 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.11559e-07 ( -1.24317e-07  1.24644e-07 ) 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 = -8.024386640723181E-01, IMY = 8.120364178031654E-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:
-179.200000 -15.760000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 10.5218  -5.0012    2.4  26.0   48.1   2.6267   4.9 ------	UNKNOWN                       
346.9851   9.3895    2.5  34.9   -5.3   2.3590   4.5 ------	UNKNOWN                       
338.6932  30.7232    3.2  57.4   -9.4   8.2809   3.7 ------	UNKNOWN                       
326.8030 -81.4081    3.1  57.4 -170.2   8.3334   3.7 ------	UNKNOWN                       
322.0800 -76.6061    2.2  53.8 -166.2   7.1839   5.2 ------	UNKNOWN                       
314.7630   5.5362    2.4  48.2  -50.7  10.2779   4.8 ------	UNKNOWN

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

    Time interval of the image:
-15.760000 15.452000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
347.9754  12.4502    2.9  37.8   -2.9   0.5041   3.9 ------	UNKNOWN                       
330.7157  -5.7354    2.8  28.8  -46.5   0.5983   4.2 ------	UNKNOWN                       
318.3168 -44.9780    3.2  34.4 -129.1   0.6477   3.6 ------	UNKNOWN                       
316.0584   0.3517    3.1  43.9  -55.1   2.1904   3.8 ------	UNKNOWN                       
299.3068 -53.1499    0.5  48.8 -134.7  19.4487  22.5 ------	UNKNOWN

    Post-slew image of 15-350 keV band 

    Time interval of the image:
528.100630 962.893400
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.4534 -40.7431   15.9  14.7  103.6  -0.2154  -0.7   11.8	Vela X-1                      
170.3208 -60.5973    0.9  16.8 -121.3   4.0744  13.2    1.5	Cen X-3                       
186.6731 -62.7812    2.3  24.6 -115.5   2.1395   5.0    0.8	GX 301-2                      
159.2259 -14.9716    3.5  42.8  145.3   2.7014   3.3 ------	UNKNOWN                       
113.1221 -35.3810    2.7  27.1   63.2   1.8559   4.2 ------	UNKNOWN                       
160.3388 -21.9199    3.0  36.5  150.2   2.1243   3.8 ------	UNKNOWN                       
201.1806 -17.8182    3.5  59.1 -166.2   6.6626   3.3 ------	UNKNOWN                       
 29.8424 -52.0440    3.0  58.3  -19.7   6.8161   3.9 ------	UNKNOWN                       
235.2930 -70.2081    2.8  41.0  -93.4   7.0642   4.1 ------	UNKNOWN