Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time: Fri Feb 10 13:41:59 EST 2017
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger732188
======================================================================

  Trigger: 00732188      Segment: 000

  BAT Trigger Time: 505879338.56   [s; MET]
      Trigger Stop: 505879338.624   [s; MET]
               UTC: 2017-01-12T02:02:00.112820    [includes UTCF correction] 
       Where From?: (*SHORT BURST*) TDRSS scaled map message

  BAT 
    RA: 15.2313721880538   Dec: -17.1902816690652  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.88
     Image Trigger?:     NO
     Rate S/N Ratio:     19.2093727122985  [ if not an image trigger ]
     Image S/N Ratio:    7.88

  Analysis Position:   [ source = BAT ]
    RA: 15.2313721880538   Dec: -17.1902816690652  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 15.2321370233724   Dec: -17.2326479563214  [deg; J2000]  
        { 01h 00m 55.7s , -17d 13' 57.5" }
         +/- 2.52745210100003 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.37274693737607 [arcmin] (formal 1-sigma fit error)
    SNR: 8.08829617912963
 
  Angular difference between the analysis and refined position is 2.542355 arcmin
 
  Partial Coding Fraction: 1.015625    [ including projection effects ]

  Duration
     T90: 0.0559999346733093 +/- 0.0178885800721685
        Measured from: -0.00400000810623169
                   to: 0.0519999265670776     [s; relative to TRIGTIME]
     T50: 0.0279999375343323 +/- 0.0144221847352656
        Measured from: 0.0120000243186951
                   to: 0.0399999618530273     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.472000002861023     
                   to: 0.527999997138977     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.00400000810623169     
                   to: 0.0559999942779541     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.001391   0.010681   0.010612   0.001273
           0.001398   0.001758   0.001891   0.001255 [error]
 Peak      0.008166   0.015817   0.020115  -0.004012
           0.004990   0.005264   0.004939   0.004442 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100    0.060   -0.004    0.056
T90     0.056   -0.004    0.052
T50     0.028    0.012    0.040
Peak    1.000   -0.472    0.528
 
 
====== 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      -1.169    -0.340      0.342       -           -               -         2.08e-02     -5.38e-03          5.38e-03      78.010   57
CPL      3.476    -2.299      4.291       65.225     -10.502        13.679      2.65e+00     -2.65e+00          1.55e+02      61.770   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      -1.307     -0.557     0.538       -           -               -         2.90e-03     -1.02e-03          1.01e-03      45.340   57
CPL      0.803     -2.225     5.988       73.053     -22.474       -73.053      2.70e-02     -2.70e-02          2.52e+00      42.760   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   1.16e-09  2.63e-09  4.69e-09  1.97e-08  1.28e-08  2.81e-08   erg/cm2
      90%_error_low -4.21e-10 -7.08e-10 -1.40e-09 -9.41e-09 -3.61e-09 -1.09e-08   erg/cm2
      90%_error_hi   4.64e-10  7.05e-10  1.40e-09  1.31e-08  3.69e-09  1.42e-08   erg/cm2
Peak flux       PL   9.94e-02  1.12e-01  9.06e-02  1.22e-01  3.47e-01  4.24e-01   ph/cm2/s
      90%_error_low -5.01e-02 -4.14e-02 -3.75e-02 -7.61e-02 -1.20e-01 -1.49e-01   ph/cm2/s
      90%_error_hi   5.92e-02  4.09e-02  3.75e-02  1.25e-01  1.20e-01  1.59e-01   ph/cm2/s
 
Fluence        CPL   3.87e-10  3.59e-09  6.99e-09  1.32e-09  1.22e-08  1.23e-08   erg/cm2
      90%_error_low -3.00e-10 -1.11e-09 -2.24e-09 -1.10e-09 -3.28e-09 -3.37e-09   erg/cm2
      90%_error_hi   5.09e-10  1.06e-09  2.28e-09  2.64e-09  3.53e-09  3.91e-09   erg/cm2
Peak flux      CPL   5.94e-02  1.26e-01  1.12e-01  3.04e-02  3.22e-01  3.30e-01   ph/cm2/s
      90%_error_low -5.94e-02 -6.68e-02     N/A   -3.04e-02 -1.22e-01 -1.28e-01   ph/cm2/s
      90%_error_hi   7.27e-02  5.23e-02     N/A    1.17e-01  1.23e-01  1.47e-01   ph/cm2/s
 
======================================================================
  • Special notes of this burst




    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   -0.004 sec. to    0.056 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.16862     ( -0.348186   0.334413 )
Norm@50keV  : 2.07762E-02    ( -0.00537981   0.00537643 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          78.01 using 59 PHA bins.
# Reduced chi-squared =          1.369 for     57 degrees of freedom 
# Null hypothesis probability =   3.372855e-02
 
Photon flux (15-150 keV)    in 0.06 sec: 2.42782 ( -0.62546  0.62611 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.27865e-08 ( -3.61137e-09  3.69178e-09 ) ergs/cm2
    Cutoff power-law model
    Time interval is from   -0.004 sec. to    0.056 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 3.47622     ( -2.34308   4.24666 )
Epeak [keV] : 65.2248      ( -10.1269 14.0539 )
Norm@50keV  : 2.64642    ( -3.08905   154.921 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.77 using 59 PHA bins.
# Reduced chi-squared =          1.103 for     56 degrees of freedom 
# Null hypothesis probability =   2.777112e-01
 
Photon flux (15-150 keV)    in 0.06 sec: 2.35610 ( -0.57792  0.60221 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.22059e-08 ( -3.28065e-09  3.52924e-09 ) ergs/cm2

    1-s peak spectrum fit

    Power-law model
    Time interval is from   -0.472 sec. to    0.528 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.30708     ( -0.555298   0.539646 )
Norm@50keV  : 2.90305E-03    ( -0.00101808   0.00101055 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          45.34 using 59 PHA bins.
# Reduced chi-squared =         0.7954 for     57 degrees of freedom 
# Null hypothesis probability =   8.672664e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.346834 ( -0.119679  0.120069 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.86273e-08 ( -1.09017e-08  1.13663e-08 ) ergs/cm2
    Cutoff power-law model
    Time interval is from   -0.472 sec. to    0.528 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.803126     ( -2.27179   5.94117 )
Epeak [keV] : 73.0531      ( -22.3328 -72.9123 )
Norm@50keV  : 2.70193E-02    ( -0.0283308   2.52262 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          42.76 using 59 PHA bins.
# Reduced chi-squared =         0.7635 for     56 degrees of freedom 
# Null hypothesis probability =   9.035627e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.322345 ( -0.12216  0.123252 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.65797e-08 ( -1.00494e-08  1.13108e-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.




    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:
-239.560000 -0.004000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 54.7969 -35.0818    2.6  28.3  126.1   1.1839   4.5 ------	UNKNOWN                       
 25.6239 -10.8556    2.6  22.1   34.2   0.9002   4.5 ------	UNKNOWN                       
 24.7525 -19.2891    3.1  13.7   37.6   0.6490   3.7 ------	UNKNOWN                       
348.1739  -6.3784    3.4  40.0  -35.0   1.0283   3.4 ------	UNKNOWN                       
346.8138  -0.8920    5.7  44.9  -30.9   0.6852   2.0 ------	UNKNOWN                       
324.4027 -58.6525    2.3  45.4 -121.2   4.3462   5.0 ------	UNKNOWN

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

    Time interval of the image:
-0.004000 0.056000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 15.2321 -17.2327    1.4  16.1    2.0   0.0247   8.1 ------	UNKNOWN                       
 33.2299 -77.9059    2.2  45.7 -162.3   0.0317   5.1 ------	UNKNOWN                       
359.7248 -71.1358    2.1  40.3 -148.3   0.0290   5.5 ------	UNKNOWN

    Post-slew image of 15-350 keV band 

    Time interval of the image:
46.540590 962.538200
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 55.8480  -9.3095    3.3  40.2  102.9   8.0163   3.5 ------	UNKNOWN                       
 19.6315  -4.1286    2.9  13.7   37.6   1.9784   4.0 ------	UNKNOWN                       
 29.5462 -39.2060    3.8  25.3  172.2   1.7686   3.0 ------	UNKNOWN                       
 12.8131 -48.8574    3.5  31.7 -158.2   2.0553   3.4 ------	UNKNOWN                       
351.6979 -57.1899    3.7  43.7 -142.9   3.6406   3.1 ------	UNKNOWN