Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time: Wed Jun 24 17:35:53 EDT 2015
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger213630
======================================================================

  Trigger: 00213630      Segment: 000

  BAT Trigger Time: 171224145.856   [s; MET]
      Trigger Stop: 171224148.928   [s; MET]
               UTC: 2006-06-05T18:15:44.618460    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 322.143864682533   Dec: -6.06022138273773  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.96
     Image Trigger?:     NO
     Rate S/N Ratio:     15.9059737205869  [ if not an image trigger ]
     Image S/N Ratio:    7.96

  Analysis Position:   [ source = BAT ]
    RA: 322.143864682533   Dec: -6.06022138273773  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 322.129781510569   Dec: -6.06846647403918  [deg; J2000]  
        { 21h 28m 31.1s , -06d 04' 06.5" }
         +/- 1.85697527596307 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.794150001170612 [arcmin] (formal 1-sigma fit error)
    SNR: 12.5634708072738
 
  Angular difference between the analysis and refined position is 0.975076 arcmin
 
  Partial Coding Fraction: 0.875    [ including projection effects ]

  Duration
     T90: 79.8400000333786 +/- 6.63277919057222
        Measured from: -64.9200000166893
                   to: 14.9200000166893     [s; relative to TRIGTIME]
     T50: 33.9480000138283 +/- 23.9535473518918
        Measured from: -25.8240000009537
                   to: 8.1240000128746     [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: -67.16400000453     
                   to: 18.1119999885559     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.326240   0.489489   0.329745   0.082731
           0.043140   0.044683   0.039689   0.035766 [error]
 Peak      0.011464   0.018566   0.024844   0.013912
           0.004744   0.005092   0.004671   0.004048 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100   85.276  -67.164   18.112
T90    79.840  -64.920   14.920
T50    33.948  -25.824    8.124
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      -1.525    -0.193      0.190       -           -               -         8.83e-04     -1.03e-04          1.01e-04      80.720   57
CPL     -0.876    -0.768      0.964       79.451     -25.275       -79.451      1.98e-03     -1.15e-03          4.57e-03      78.790   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      -0.851     -0.405     0.450       -           -               -         4.13e-03     -1.00e-03          9.74e-04      52.090   57
CPL     -0.682      0.682     2.651      461.770    -461.770      -461.770      4.89e-03     -1.67e-03          5.22e-02      52.070   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   9.84e-08  1.78e-07  2.48e-07  7.18e-07  7.11e-07  1.24e-06   erg/cm2
      90%_error_low -1.69e-08 -1.97e-08 -3.81e-08 -2.07e-07 -9.06e-08 -2.44e-07   erg/cm2
      90%_error_hi   1.75e-08  1.96e-08  3.82e-08  2.58e-07  9.23e-08  2.86e-07   erg/cm2
Peak flux       PL   9.16e-02  1.36e-01  1.51e-01  3.16e-01  4.74e-01  6.94e-01   ph/cm2/s
      90%_error_low -4.28e-02 -4.34e-02 -3.58e-02 -1.39e-01 -1.12e-01 -1.71e-01   ph/cm2/s
      90%_error_hi   5.18e-02  4.19e-02  3.53e-02  2.05e-01  1.12e-01  1.92e-01   ph/cm2/s
 
Fluence        CPL   9.08e-08  1.92e-07  2.49e-07  2.59e-07  6.63e-07  7.91e-07   erg/cm2
      90%_error_low -1.95e-08 -2.58e-08 -4.30e-08 -1.76e-07 -1.06e-07 -2.08e-07   erg/cm2
      90%_error_hi   1.98e-08  2.71e-08  4.19e-08  5.31e-07  1.09e-07  6.73e-07   erg/cm2
Peak flux      CPL   8.74e-02  1.37e-01  1.54e-01  2.65e-01  4.71e-01  6.43e-01   ph/cm2/s
      90%_error_low -3.10e-02 -4.43e-02 -3.83e-02 -2.65e-01 -1.18e-01 -2.66e-01   ph/cm2/s
      90%_error_hi   5.52e-02  4.61e-02  5.07e-02  1.55e-01  1.11e-01  2.24e-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
  322.1298    -6.0685   0.0154    15.7719   128.0141         1.2096779     12.563 TRIG_00213630                 
 
Foreground time interval of the image:
-67.164  18.112 (delta_t =  85.276 [sec])
Background time interval of the image:
-239.856 -67.164 (delta_t = 172.692 [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  -67.164 sec. to   18.112 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.52478     ( -0.192707   0.189501 )
Norm@50keV  : 8.82766E-04    ( -0.000102599   0.000101482 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          80.72 using 59 PHA bins.
# Reduced chi-squared =          1.416 for     57 degrees of freedom 
# Null hypothesis probability =   2.105907e-02
 
Photon flux (15-150 keV)    in 85.28 sec: 0.110958 ( -0.0120734  0.012079 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.11454e-07 ( -9.06467e-08  9.22704e-08 ) ergs/cm2
    Cutoff power-law model
    Time interval is from  -67.164 sec. to   18.112 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.875526     ( -0.767937   0.964393 )
Epeak [keV] : 79.4508      ( -25.2729 -79.449 )
Norm@50keV  : 1.97858E-03    ( -0.00114905   0.00456559 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          78.79 using 59 PHA bins.
# Reduced chi-squared =          1.407 for     56 degrees of freedom 
# Null hypothesis probability =   2.404245e-02
 
Photon flux (15-150 keV)    in 85.28 sec: 0.107750 ( -0.0127047  0.012681 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.63281e-07 ( -1.05816e-07  1.08897e-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: -0.850847     ( -0.404766   0.449549 )
Norm@50keV  : 4.13155E-03    ( -0.00100436   0.000973977 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.09 using 59 PHA bins.
# Reduced chi-squared =         0.9139 for     57 degrees of freedom 
# Null hypothesis probability =   6.593130e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.474258 ( -0.11156  0.112339 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.72835e-08 ( -1.1393e-08  1.14857e-08 ) 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: -0.681656     ( 0.682187   2.65112 )
Epeak [keV] : 461.770      ( -463.59 -463.59 )
Norm@50keV  : 4.88959E-03    ( -0.0016695   0.0522334 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.07 using 59 PHA bins.
# Reduced chi-squared =         0.9298 for     56 degrees of freedom 
# Null hypothesis probability =   6.244134e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.471189 ( -0.118223  0.111025 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.69364e-08 ( -1.26201e-08  1.14888e-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 = -1.739427496175877E-01, IMY = -2.225240647271498E-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:
-239.856000 -67.164000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
326.0623  38.2746    5.0  50.3 -170.1   0.6728   2.3    5.9	Cyg X-2                       
 20.4566 -52.0789    2.6  53.9  -10.0   1.5332   4.4 ------	UNKNOWN                       
344.7283  19.1682    2.5  31.0 -144.9   0.7259   4.6 ------	UNKNOWN                       
 12.8827   9.9392    3.4  41.1  -97.9   2.1868   3.4 ------	UNKNOWN

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

    Time interval of the image:
-67.164000 18.112000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
326.3107  38.2038    5.9  50.2 -169.9   0.4293   2.0    9.6	Cyg X-2                       
308.9065 -52.6632    2.6  47.6   44.3   2.1461   4.4 ------	UNKNOWN                       
322.1298  -6.0685    0.9  15.8  128.0   1.2096  12.6 ------	UNKNOWN                       
355.2684  12.2094    2.6  29.2 -120.5   0.6005   4.5 ------	UNKNOWN

    Post-slew image of 15-350 keV band 

    Time interval of the image:
76.844590 593.744590
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
288.7868  10.9490    3.0  37.3  139.0   2.0933   3.8    0.7	GRS 1915+105                  
299.5908  35.2119    0.6  46.4  176.3  11.5951  20.5    0.6	Cyg X-1                       
308.2158  41.0145   20.4  48.8 -172.0  -0.3438  -0.6    6.1	Cyg X-3                       
326.1630  38.3146  127.2  44.5 -153.5  -0.0499  -0.1    0.6	Cyg X-2                       
  2.1797 -39.3860    2.6  49.0  -19.2   2.5242   4.4 ------	UNKNOWN                       
346.3724  38.4234    3.0  49.8 -133.2   4.9419   3.9 ------	UNKNOWN