Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time: Sun Nov 23 17:43:19 EST 2014
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger618032
======================================================================

  Trigger: 00618032      Segment: 000

  BAT Trigger Time: 437212072   [s; MET]
      Trigger Stop: 437212192   [s; MET]
               UTC: 2014-11-09T07:47:39.235840    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 222.360819451024   Dec: 73.1249180132632  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.55
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    7.55

  Analysis Position:   [ source = BAT ]
    RA: 222.360819451024   Dec: 73.1249180132632  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 222.361   Dec: 73.1249  [deg; J2000]
        { 14h 49m 26.6s , +73d 07' 29.6" }
        +/- 2.59982618226 [arcmin] (estimated 90% radius based on SNR)
    SNR: 7.76958115762
 
 
  Angular difference between the analysis and refined position is 0.003325 arcmin
 
  Partial Coding Fraction: 0.7578125    [ including projection effects ]

  Duration
     T90: 220.503999948502 +/- 11.344304639184
        Measured from: -179.431999981403
                   to: 41.0719999670982     [s; relative to TRIGTIME]
     T50: 48.891999900341 +/- 111.732828589148
        Measured from: -20.783999979496
                   to: 28.107999920845     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 28.472000002861     
                   to: 29.472000002861     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -182.783999979496     
                   to: 44.4079999923706     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.679505   0.646702   0.333170   0.007071
           0.094423   0.096687   0.083267   0.070581 [error]
 Peak      0.018242   0.016543   0.012897   0.015772
           0.006263   0.006318   0.005584   0.004704 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100  227.192 -182.784   44.408
T90   220.504 -179.432   41.072
T50    48.892  -20.784   28.108
Peak    1.000   28.472   29.472
 
 
====== 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      -2.180    -0.359      0.316       -           -               -         3.86e-04     -9.52e-05          9.16e-05      61.660   57
CPL     -1.939     N/A        N/A          10.220      N/A           N/A         5.37e-04        N/A               N/A         61.570   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      -1.550     -0.732     0.688       -           -               -         3.20e-03     -1.28e-03          1.18e-03      52.860   57
CPL     -1.547     -0.954     1.646     9999.350      N/A           N/A         3.20e-03        N/A               N/A         52.870   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   2.13e-07  2.59e-07  2.29e-07  3.48e-07  8.23e-07  1.05e-06   erg/cm2
      90%_error_low -4.33e-08 -4.50e-08 -7.38e-08 -1.77e-07 -1.69e-07 -2.82e-07   erg/cm2
      90%_error_hi   4.41e-08  4.39e-08  7.88e-08  2.71e-07  1.77e-07  3.57e-07   erg/cm2
Peak flux       PL   1.38e-01  1.35e-01  9.21e-02  9.87e-02  4.05e-01  4.64e-01   ph/cm2/s
      90%_error_low -7.68e-02 -5.10e-02 -4.62e-02 -7.21e-02 -1.43e-01 -1.66e-01   ph/cm2/s
      90%_error_hi   8.72e-02  4.88e-02  4.43e-02  1.40e-01  1.43e-01  1.71e-01   ph/cm2/s
 
Fluence        CPL   2.10e-07  2.67e-07  2.26e-07  2.47e-07  8.05e-07  9.31e-07   erg/cm2
      90%_error_low -4.76e-08    N/A    -8.42e-08 -1.58e-07 -1.83e-07    N/A      erg/cm2
      90%_error_hi   4.20e-08    N/A     7.87e-08  4.35e-07  1.94e-07    N/A      erg/cm2
Peak flux      CPL   1.43e-01  1.34e-01  9.02e-02  1.00e-01  4.06e-01  4.67e-01   ph/cm2/s
      90%_error_low     N/A   -5.06e-02 -9.02e-02     N/A   -1.45e-01 -1.83e-01   ph/cm2/s
      90%_error_hi      N/A    4.95e-02  -2.36e-03     N/A    1.43e-01  1.65e-01   ph/cm2/s
 
======================================================================
  • Special notes of this burst




    Image

    Pre-slew 15.0-50.0 keV image (Event data)

    #RAcent DECcent POSerr Theta  Phi  Peak_Cts  SNR Name
222.361 73.125 0.000 16.959 71.644 0.802 7.770 TRIG_00618032
 
Image time interval: 0.000 to 120.000 [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 -182.784 sec. to   44.408 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.18042     ( -0.359451   0.315755 )
Norm@50keV  : 3.86038E-04    ( -9.51674e-05   9.15925e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.66 using 59 PHA bins.
# Reduced chi-squared =          1.082 for     57 degrees of freedom 
# Null hypothesis probability =   3.132065e-01
 
Photon flux (15-150 keV)    in 227.2 sec: 6.32652E-02 ( -0.0099774  0.0099804 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.226e-07 ( -1.6875e-07  1.76982e-07 ) ergs/cm2
    Cutoff power-law model
    Time interval is from -182.784 sec. to   44.408 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.93907     (       )
Epeak [keV] : 10.2198      (   )
Norm@50keV  : 5.37081E-04    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.57 using 59 PHA bins.
# Reduced chi-squared =          1.099 for     56 degrees of freedom 
# Null hypothesis probability =   2.835166e-01
 
Photon flux (15-150 keV)    in 227.2 sec: 6.32217E-02 ( -0.0098837  0.0100483 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.04967e-07 ( -1.82512e-07  1.93809e-07 ) ergs/cm2

    1-s peak spectrum fit

    Power-law model
    Time interval is from   28.472 sec. to   29.472 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.55048     ( -0.732391   0.68807 )
Norm@50keV  : 3.19583E-03    ( -0.00127594   0.00118161 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.86 using 59 PHA bins.
# Reduced chi-squared =         0.9274 for     57 degrees of freedom 
# Null hypothesis probability =   6.309151e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.404641 ( -0.142957  0.143209 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.00878e-08 ( -1.23197e-08  1.27799e-08 ) ergs/cm2
    Cutoff power-law model
    Time interval is from   28.472 sec. to   29.472 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.38685     ( -0.114393   2.4856 )
Epeak [keV] : 134.642      (   )
Norm@50keV  : 1.21455E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.70 using 59 PHA bins.
# Reduced chi-squared =         0.9410 for     56 degrees of freedom 
# Null hypothesis probability =   6.006537e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.405796 ( -0.144687  0.142986 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.94138e-08 ( -1.50356e-08  8.38909e-09 ) ergs/cm2

    Time-resolved spectra




    Distribution

    T90 vs. Hardness ratio plot 

    T90                                   = 220.504 sec.
Hardness ratio (energy fluence ratio) = 0.882470608689

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

    S(15-50 keV)  = 4.724631e-07
S(50-150 keV) = 3.501355e-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 = 0.0960353381593, IMY = -0.289433727127

    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:
-658.499390 -641.258100
-239.000000 -182.784000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.4266  35.3848    6.1  27.2 -151.9   0.1856   1.9    3.0	Her X-1                       
299.5695  35.2427    5.9  50.9  161.3   0.7125   2.0    2.7	Cyg X-1                       
308.0997  40.9620   44.2  51.3  150.0   0.1396   0.3    0.7	Cyg X-3                       
140.7853  50.3625    2.8  49.3   20.9   1.2942   4.1 ------	UNKNOWN                       
250.3696  10.8906    2.4  48.4 -130.4   2.1756   4.7 ------	UNKNOWN                       
251.5612  10.5095    2.3  49.1 -131.8   2.4371   5.1 ------	UNKNOWN

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

    Time interval of the image:
-182.784000 44.408000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.5248  35.1588    0.0  27.4 -151.8  -0.1168  -0.3   11.5	Her X-1                       
299.4541  35.3049    4.7  50.8  161.3  -2.8440  -2.5    9.1	Cyg X-1                       
307.9657  40.9048    5.0  51.3  150.1   4.2286   2.3    7.2	Cyg X-3                       
222.1858  73.1717    2.4  17.0   71.5   1.8143   4.8 ------	UNKNOWN                       
272.0286  10.7380    2.5  56.5 -155.4   6.0434   4.5 ------	UNKNOWN                       
253.4361  10.1043    2.3  50.0 -133.9   8.0436   5.1 ------	UNKNOWN

    Post-slew image of 15-350 keV band 

    Time interval of the image:
168.700600 963.040000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.4190  35.4963   20.2  40.9 -129.2  -0.5325  -0.6    9.4	Her X-1                       
299.5971  35.1883    2.4  52.9 -177.5   6.8839   4.8    0.9	Cyg X-1                       
308.0634  40.9369    3.2  50.0  171.8   4.3593   3.6    2.3	Cyg X-3                       
 63.0547  70.6182    2.9  35.7   80.5   5.0375   4.0 ------	UNKNOWN                       
237.3776  64.8178    2.5   9.8 -128.2   1.9452   4.6 ------	UNKNOWN                       
270.9505  43.9856    2.4  36.6 -152.8   2.5907   4.9 ------	UNKNOWN                       
211.2737  31.3100    2.4  42.2  -73.8   8.6616   4.8 ------	UNKNOWN