Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time: Wed Jan 22 20:27:49 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger153514
======================================================================

  Trigger: 00153514      Segment: 000

  BAT Trigger Time: 147491504   [s; MET]
      Trigger Stop: 147491568   [s; MET]
               UTC: 2005-09-04T01:51:44.290000    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 13.67015365989   Dec: 14.1381730057214  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    13.26
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    13.26

  Analysis Position:   [ source = BAT ]
    RA: 13.67015365989   Dec: 14.1381730057214  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 13.7157652137441   Dec: 14.075392814314  [deg; J2000]  
        { 00h 54m 51.8s , +14d 04' 31.4" }
         +/- 1.33850511717752 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.539188828709435 [arcmin] (formal 1-sigma fit error)
    SNR: 20.0554593947411
 
  Angular difference between the analysis and refined position is 4.607977 arcmin
 
  Partial Coding Fraction: 0.5703125    [ including projection effects ]

  Duration
     T90: 181.576000005007 +/- 16.3062554673326
        Measured from: 15.2120000123978
                   to: 196.788000017405     [s; relative to TRIGTIME]
     T50: 88.027999997139 +/- 10.9211036186879
        Measured from: 60.9399999976158
                   to: 148.967999994755     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 27.4399999976158     
                   to: 28.4399999976158     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -13.5160000026226     
                   to: 216.956000000238     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.788991   2.640542   2.517093   0.859196
           0.085057   0.089311   0.080507   0.072677 [error]
 Peak      0.014648   0.029444   0.027253   0.012689
           0.006622   0.006960   0.006522   0.005894 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100  230.472  -13.516  216.956
T90   181.576   15.212  196.788
T50    88.028   60.940  148.968
Peak    1.000   27.440   28.440
 
 
====== 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      -1.233    -0.066      0.066       -           -               -         2.25e-03     -7.98e-05          7.98e-05      55.310   57
CPL     -1.134    -0.129      0.251      484.894    -484.894      -484.894      2.49e-03     -4.12e-04          7.29e-04      54.810   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      -1.239     -0.428     0.446       -           -               -         5.36e-03     -1.38e-03          1.38e-03      50.550   57
CPL      0.326     -2.568     4.567       71.903     -19.664       -71.903      3.41e-02     -3.41e-02          6.55e+00      49.310   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   5.15e-07  1.12e-06  1.90e-06  7.43e-06  5.21e-06  1.10e-05   erg/cm2
      90%_error_low -3.73e-08 -4.76e-08 -7.93e-08 -6.99e-07 -2.00e-07 -7.42e-07   erg/cm2
      90%_error_hi   3.83e-08  4.73e-08  7.91e-08  7.51e-07  2.01e-07  7.86e-07   erg/cm2
Peak flux       PL   1.72e-01  2.02e-01  1.71e-01  2.46e-01  6.33e-01  7.91e-01   ph/cm2/s
      90%_error_low -7.50e-02 -6.06e-02 -5.14e-02 -1.23e-01 -1.67e-01 -2.10e-01   ph/cm2/s
      90%_error_hi   8.64e-02  5.91e-02  5.06e-02  1.85e-01  1.68e-01  2.18e-01   ph/cm2/s
 
Fluence        CPL   5.03e-07  1.12e-06  1.92e-06  6.45e-06  5.17e-06  9.99e-06   erg/cm2
      90%_error_low -4.64e-08 -4.43e-08 -8.88e-08 -1.84e-06 -2.17e-07 -1.83e-06   erg/cm2
      90%_error_hi   4.01e-08  5.14e-08  8.97e-08  1.15e-06  2.11e-07  1.21e-06   erg/cm2
Peak flux      CPL   1.32e-01  2.33e-01  1.85e-01  5.64e-02  5.93e-01  6.06e-01   ph/cm2/s
      90%_error_low -9.11e-02 -7.67e-02 -7.01e-02 -5.64e-02 -1.82e-01 -1.94e-01   ph/cm2/s
      90%_error_hi   1.04e-01  8.58e-02  6.34e-02  2.44e-01  1.80e-01  3.05e-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
   13.7158    14.0754   0.0096    35.0872    13.4001         2.5233754     20.055 TRIG_00153514                 
 
Foreground time interval of the image:
 -2.099  74.301 (delta_t =  76.400 [sec])
Background time interval of the image:




    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  -13.516 sec. to  216.956 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.23274     ( -0.0657686   0.0662291 )
Norm@50keV  : 2.24719E-03    ( -7.9824e-05   7.97929e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.31 using 59 PHA bins.
# Reduced chi-squared =         0.9703 for     57 degrees of freedom 
# Null hypothesis probability =   5.388897e-01
 
Photon flux (15-150 keV)    in 230.5 sec: 0.265056 ( -0.009987  0.010007 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.20835e-06 ( -1.99933e-07  2.0057e-07 ) ergs/cm2
    Cutoff power-law model
    Time interval is from  -13.516 sec. to  216.956 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.13378     ( -0.128839   0.251087 )
Epeak [keV] : 484.894      ( -485.207 -485.207 )
Norm@50keV  : 2.49465E-03    ( -0.000411368   0.000728789 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.81 using 59 PHA bins.
# Reduced chi-squared =         0.9788 for     56 degrees of freedom 
# Null hypothesis probability =   5.199533e-01
 
Photon flux (15-150 keV)    in 230.5 sec: 0.263525 ( -0.010622  0.00516 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.17429e-06 ( -2.17036e-07  2.11398e-07 ) ergs/cm2

    1-s peak spectrum fit

    Power-law model
    Time interval is from   27.440 sec. to   28.440 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.23922     ( -0.428356   0.445951 )
Norm@50keV  : 5.36306E-03    ( -0.00138334   0.00138204 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.55 using 59 PHA bins.
# Reduced chi-squared =         0.8868 for     57 degrees of freedom 
# Null hypothesis probability =   7.141369e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.633220 ( -0.166987  0.167879 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.38319e-08 ( -1.51026e-08  1.54405e-08 ) ergs/cm2
    Cutoff power-law model
    Time interval is from   27.440 sec. to   28.440 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.325896     ( -2.56964   4.56558 )
Epeak [keV] : 71.9028      ( -19.6196 -71.8588 )
Norm@50keV  : 3.40860E-02    ( -0.0341984   6.5535 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.31 using 59 PHA bins.
# Reduced chi-squared =         0.8806 for     56 degrees of freedom 
# Null hypothesis probability =   7.241283e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.593446 ( -0.181858  0.180244 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.66573e-08 ( -1.69946e-08  1.89995e-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 = 6.833533355773687E-01, IMY = -1.627988033229366E-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:

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

    Time interval of the image:
-2.099400 74.300600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
288.7955  10.8728    2.8  47.6 -172.9   0.6872   4.2    4.4	GRS 1915+105                  
299.5854  35.2000    0.7  36.8 -136.7   2.3163  17.4    0.3	Cyg X-1                       
308.2152  40.9710    2.9  32.8 -122.7   0.5350   4.0    4.9	Cyg X-3                       
326.3915  38.2172    0.0  21.0 -104.7   0.2653   2.5   12.1	Cyg X-2                       
 13.7161  14.0749    0.6  35.1   13.4   2.5524  20.3 ------	UNKNOWN                       
 36.4604  15.8808    2.6  56.1    3.8   2.0484   4.4 ------	UNKNOWN                       
 37.8899  45.0399    3.4  55.6  -31.7   1.5633   3.4 ------	UNKNOWN

    Post-slew image of 15-350 keV band 

    Time interval of the image:
148.500600 303.075500
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
326.2902  38.1973    3.4  48.2  162.3   1.1709   3.4    9.3	Cyg X-2                       
 13.7231  14.0769    0.4   0.1  -52.5   3.2787  26.0 ------	UNKNOWN                       
343.8673  63.9474    2.4  54.0 -162.5   1.6834   4.8 ------	UNKNOWN                       
 61.8225   4.4621    3.2  48.4  -50.2   2.2575   3.6 ------	UNKNOWN                       
 38.2510  59.0498    2.7  48.5 -130.2   2.5322   4.3 ------	UNKNOWN