Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time: Sun Dec 14 17:25:18 EST 2014
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger619182
======================================================================

  Trigger: 00619182      Segment: 000

  BAT Trigger Time: 438234656   [s; MET]
      Trigger Stop: 438234944   [s; MET]
               UTC: 2014-11-21T03:50:43.185060    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 122.667985354439   Dec: 22.2254978756992  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    11.91
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    11.91

  Analysis Position:   [ source = BAT ]
    RA: 122.667985354439   Dec: 22.2254978756992  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 122.64715029437   Dec: 22.2107022872573  [deg; J2000]  
        { 08h 10m 35.3s , +22d 12' 38.5" }
         +/- 2.52113351994949 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.22893388938581 [arcmin] (formal 1-sigma fit error)
    SNR: 8.1172706681212
 
  Angular difference between the analysis and refined position is 1.458555 arcmin
 
  Partial Coding Fraction: 0.328125    [ including projection effects ]

  Duration
     T90: 481.003999948502 +/- 38.0626023493275
        Measured from: 163.77999997139
                   to: 644.783999919891     [s; relative to TRIGTIME]
     T50: 146.883999943733 +/- 210.39239915443
        Measured from: 216.240000009537
                   to: 363.12399995327     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 230.143999993801     
                   to: 231.143999993801     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 110.32800000906     
                   to: 663.040000021458     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     2.321214   3.081351   1.591725   0.423847
           0.188809   0.195624   0.170573   0.154670 [error]
 Peak      0.038886   0.035252   0.027055   0.005215
           0.009933   0.010609   0.009660   0.008729 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100  552.712  110.328  663.040
T90   481.004  163.780  644.784
T50   146.884  216.240  363.124
Peak    1.000  230.144  231.144
 
 
====== 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      -1.750    -0.143      0.140       -           -               -         8.47e-04     -7.40e-05          7.30e-05      64.050   57
CPL     -1.429    -0.476      0.636       79.040     -30.999       -79.040      1.28e-03     -4.87e-04          1.59e-03      63.080   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      -1.846     -0.609     0.501       -           -               -         6.28e-03     -2.36e-03          2.19e-03      62.790   57
CPL     -1.040     -1.156     3.605       56.577      N/A           N/A         1.69e-02        N/A               N/A         62.390   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   7.56e-07  1.19e-06  1.42e-06  3.28e-06  4.32e-06  6.65e-06   erg/cm2
      90%_error_low -9.01e-08 -9.24e-08 -1.67e-07 -7.32e-07 -3.89e-07 -9.02e-07   erg/cm2
      90%_error_hi   9.24e-08  9.24e-08  1.68e-07  8.65e-07  3.94e-07  1.01e-06   erg/cm2
Peak flux       PL   3.61e-01  2.96e-01  1.65e-01  1.35e-01  8.81e-01  9.56e-01   ph/cm2/s
      90%_error_low -1.41e-01 -8.51e-02 -7.70e-02 -9.16e-02 -2.53e-01 -2.82e-01   ph/cm2/s
      90%_error_hi   1.53e-01  8.51e-02  7.79e-02  1.55e-01  2.53e-01  2.87e-01   ph/cm2/s
 
Fluence        CPL   7.30e-07  1.24e-06  1.42e-06  1.86e-06  4.17e-06  5.25e-06   erg/cm2
      90%_error_low -1.01e-07 -1.21e-07 -1.80e-07 -1.12e-06 -4.66e-07 -1.23e-06   erg/cm2
      90%_error_hi   1.02e-07  1.26e-07  1.77e-07  1.65e-06  4.66e-07  1.80e-06   erg/cm2
Peak flux      CPL   3.21e-01  3.24e-01  1.75e-01  6.03e-02  8.62e-01  8.80e-01   ph/cm2/s
      90%_error_low     N/A   -1.06e-01 -8.55e-02 -6.03e-02 -2.63e-01 -2.79e-01   ph/cm2/s
      90%_error_hi      N/A    1.16e-01  9.44e-02  1.17e-01  2.59e-01  3.36e-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
  122.6472    22.2107   0.0236    31.2293   116.2961         2.8631846      8.117 TRIG_00619182                 
 
Foreground time interval of the image:
110.328 299.501 (delta_t = 189.173 [sec])
Background time interval of the image:
-239.000 110.328 (delta_t = 349.328 [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  110.328 sec. to  663.040 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.74961     ( -0.142547   0.139524 )
Norm@50keV  : 8.47370E-04    ( -7.39574e-05   7.30378e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.05 using 59 PHA bins.
# Reduced chi-squared =          1.124 for     57 degrees of freedom 
# Null hypothesis probability =   2.429419e-01
 
Photon flux (15-150 keV)    in 552.7 sec: 0.114568 ( -0.008934  0.008939 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.32235e-06 ( -3.88934e-07  3.94041e-07 ) ergs/cm2
    Cutoff power-law model
    Time interval is from  110.328 sec. to  663.040 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.42906     ( -0.476461   0.635563 )
Epeak [keV] : 79.0396      ( -30.999 -79.0398 )
Norm@50keV  : 1.27625E-03    ( -0.000487166   0.00158505 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          63.08 using 59 PHA bins.
# Reduced chi-squared =          1.126 for     56 degrees of freedom 
# Null hypothesis probability =   2.403247e-01
 
Photon flux (15-150 keV)    in 552.7 sec: 0.112944 ( -0.009386  0.009355 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.1733e-06 ( -4.65814e-07  4.66396e-07 ) ergs/cm2

    1-s peak spectrum fit

    Power-law model
    Time interval is from  230.144 sec. to  231.144 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.8462     ( -0.609175   0.500962 )
Norm@50keV  : 6.27911E-03    ( -0.00236307   0.00218631 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.79 using 59 PHA bins.
# Reduced chi-squared =          1.102 for     57 degrees of freedom 
# Null hypothesis probability =   2.785910e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.881284 ( -0.252997  0.252996 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.77471e-08 ( -2.03576e-08  2.13936e-08 ) ergs/cm2
    Cutoff power-law model
    Time interval is from  230.144 sec. to  231.144 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.04044     ( -1.15866   3.60296 )
Epeak [keV] : 56.5770      (   )
Norm@50keV  : 1.68536E-02    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.39 using 59 PHA bins.
# Reduced chi-squared =          1.114 for     56 degrees of freedom 
# Null hypothesis probability =   2.594371e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.861996 ( -0.262789  0.258534 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.52764e-08 ( -1.83497e-08  1.57566e-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 = -2.686058087698555E-01, IMY = -5.435764145163795E-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:
-239.000000 110.328000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.4625 -40.5880    3.5  40.8  -11.4   1.3638   3.3    3.6	Vela X-1                      
146.1964  22.7657    2.8  23.4  161.9   1.2073   4.2 ------	UNKNOWN                       
131.6486 -19.4066    2.9  22.7   11.1   1.0546   4.0 ------	UNKNOWN                       
188.4159  43.6033    2.6  59.0 -166.1   8.7204   4.4 ------	UNKNOWN                       
194.6181  26.2664    7.4  55.2 -145.1   3.4277   1.6 ------	UNKNOWN

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

    Time interval of the image:
110.328000 299.500600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.4188 -40.5813   26.3  40.8  -11.4  -0.1202  -0.4    5.3	Vela X-1                      
122.6471  22.2107    1.4  31.2  116.3   2.8621   8.1 ------	UNKNOWN                       
104.2405 -36.8199    2.5  51.9   19.1   3.6200   4.6 ------	UNKNOWN

    Post-slew image of 15-350 keV band 

    Time interval of the image:
351.500600 572.300610
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.7837  22.1441    0.0  35.9   86.4  -0.7722  -1.5   11.4	Crab                          
 92.0572  15.6373    2.8  29.7   71.6   1.3627   4.1 ------	UNKNOWN                       
 97.9439  74.2756    3.3  53.7  160.9   4.2111   3.5 ------	UNKNOWN                       
110.1124  18.3954    2.6  12.4   63.3   0.8436   4.4 ------	UNKNOWN                       
122.7423  22.2497    1.8   0.1 -140.3   1.2488   6.5 ------	UNKNOWN                       
119.5489  -9.0052    2.8  31.4   -5.1   0.9217   4.2 ------	UNKNOWN                       
132.3098 -19.2780    2.7  42.5  -24.5   1.3363   4.3 ------	UNKNOWN                       
184.7770  48.0930    2.6  55.2 -145.1   5.4872   4.4 ------	UNKNOWN                       
162.7339   8.3172    3.1  40.9  -87.6   3.3982   3.7 ------	UNKNOWN