Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time: Wed Jan 22 20:07:52 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger156434
======================================================================

  Trigger: 00156434      Segment: 000

  BAT Trigger Time: 149094120   [s; MET]
      Trigger Stop: 149094288   [s; MET]
               UTC: 2005-09-22T15:02:00.257060    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 5.79986495504588   Dec: -5.59886385721478  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.66
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    8.66

  Analysis Position:   [ source = BAT ]
    RA: 5.79986495504588   Dec: -5.59886385721478  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 5.78404911530879   Dec: -5.6210218655456  [deg; J2000]  
        { 00h 23m 08.2s , -05d 37' 15.7" }
         +/- 2.54520874396333 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.937023975116539 [arcmin] (formal 1-sigma fit error)
    SNR: 8.00780545120976
 
  Angular difference between the analysis and refined position is 1.630773 arcmin
 
  Partial Coding Fraction: 0.1152344    [ including projection effects ]

  Duration
     T90: 157.02399995923 +/- 94.4868116047978
        Measured from: 27.3840000033379
                   to: 184.407999962568     [s; relative to TRIGTIME]
     T50: 15.3759999573231 +/- 187.397459802878
        Measured from: 39.7680000066757
                   to: 55.1439999639988     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 98.636000007391     
                   to: 99.636000007391     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 24.4239999949932     
                   to: 273.624000012875     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.644715   1.671852   0.869463   0.065991
           0.188739   0.194448   0.172683   0.159015 [error]
 Peak      0.026084   0.048330   0.054775  -0.001340
           0.014706   0.014705   0.013228   0.012127 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100  249.200   24.424  273.624
T90   157.024   27.384  184.408
T50    15.376   39.768   55.144
Peak    1.000   98.636   99.636
 
 
====== 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      -2.114    -0.263      0.242       -           -               -         1.02e-03     -1.79e-04          1.73e-04      51.460   57
CPL     -1.816    -0.613      1.124       25.049     -23.507       -25.049      1.53e-03     -7.09e-04          5.57e-03      51.170   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      -1.303     -0.512     0.527       -           -               -         9.14e-03     -2.77e-03          2.76e-03      54.040   57
CPL     -0.459     -1.916     3.347      108.508    -108.508      -108.508      2.11e-02     -2.11e-02          2.94e-01      53.480   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   5.81e-07  7.37e-07  6.81e-07  1.10e-06  2.37e-06  3.10e-06   erg/cm2
      90%_error_low -9.83e-08 -9.46e-08 -1.59e-07 -4.35e-07 -3.63e-07 -6.43e-07   erg/cm2
      90%_error_hi   1.01e-07  9.39e-08  1.65e-07  5.93e-07  3.74e-07  7.64e-07   erg/cm2
Peak flux       PL   3.11e-01  3.53e-01  2.86e-01  3.86e-01  1.09e+00  1.34e+00   ph/cm2/s
      90%_error_low -1.61e-01 -1.30e-01 -9.68e-02 -2.15e-01 -3.49e-01 -4.04e-01   ph/cm2/s
      90%_error_hi   1.99e-01  1.26e-01  9.44e-02  3.25e-01  3.55e-01  4.07e-01   ph/cm2/s
 
Fluence        CPL   5.69e-07  7.64e-07  6.67e-07  6.22e-07  2.30e-06  2.62e-06   erg/cm2
      90%_error_low -1.09e-07 -1.06e-07 -1.85e-07 -5.08e-07 -4.13e-07 -6.99e-07   erg/cm2
      90%_error_hi   1.02e-07  1.30e-07  1.74e-07  1.86e-06  4.33e-07  1.34e-06   erg/cm2
Peak flux      CPL   2.44e-01  3.63e-01  3.18e-01  2.09e-01  1.05e+00  1.13e+00   ph/cm2/s
      90%_error_low -1.98e-01 -1.56e-01 -1.17e-01 -2.09e-01 -3.68e-01 -4.32e-01   ph/cm2/s
      90%_error_hi   2.38e-01  1.44e-01  1.32e-01  2.79e-01  3.70e-01  3.83e-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
    5.7840    -5.6210   0.0240    37.5967    98.3201         3.4534263      8.008 TRIG_00156434                 
 
Foreground time interval of the image:
 24.424 177.701 (delta_t = 153.277 [sec])
Background time interval of the image:
-299.000  24.424 (delta_t = 323.424 [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   24.424 sec. to  273.624 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.1141     ( -0.262904   0.241773 )
Norm@50keV  : 1.02293E-03    ( -0.000178983   0.000173412 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.46 using 59 PHA bins.
# Reduced chi-squared =         0.9028 for     57 degrees of freedom 
# Null hypothesis probability =   6.821570e-01
 
Photon flux (15-150 keV)    in 249.2 sec: 0.162076 ( -0.0201  0.020102 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.37218e-06 ( -3.62683e-07  3.73548e-07 ) ergs/cm2
    Cutoff power-law model
    Time interval is from   24.424 sec. to  273.624 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.81641     ( -0.61266   1.12352 )
Epeak [keV] : 25.0485      ( -23.5074 -25.0489 )
Norm@50keV  : 1.53246E-03    ( -0.000709001   0.00556913 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.17 using 59 PHA bins.
# Reduced chi-squared =         0.9138 for     56 degrees of freedom 
# Null hypothesis probability =   6.578694e-01
 
Photon flux (15-150 keV)    in 249.2 sec: 0.160282 ( -0.020824  0.020659 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.2972e-06 ( -4.12992e-07  4.33217e-07 ) ergs/cm2

    1-s peak spectrum fit

    Power-law model
    Time interval is from   98.636 sec. to   99.636 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.30268     ( -0.512311   0.527472 )
Norm@50keV  : 9.14166E-03    ( -0.00276712   0.00276312 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.04 using 59 PHA bins.
# Reduced chi-squared =         0.9481 for     57 degrees of freedom 
# Null hypothesis probability =   5.867747e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.09118 ( -0.34913  0.35495 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.0288e-08 ( -2.84266e-08  2.86882e-08 ) ergs/cm2
    Cutoff power-law model
    Time interval is from   98.636 sec. to   99.636 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.459236     ( -1.91677   3.34615 )
Epeak [keV] : 108.508      ( -108.462 -108.462 )
Norm@50keV  : 2.10634E-02    ( -0.0210787   0.293686 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.48 using 59 PHA bins.
# Reduced chi-squared =         0.9550 for     56 degrees of freedom 
# Null hypothesis probability =   5.707949e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.04588 ( -0.367649  0.36974 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.1665e-08 ( 0  0 ) 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 = -1.114227923780043E-01, IMY = -7.619069414942475E-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:
-299.000000 24.424000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
299.5862  35.2026    0.5  36.8  -87.8  11.4816  21.8    0.2	Cyg X-1                       
308.1217  40.9378    1.0  32.8  -73.9   3.7257  11.0    1.0	Cyg X-3                       
326.1069  38.2233    3.6  21.1  -56.3   0.6629   3.2    6.6	Cyg X-2                       
 14.7746  14.2269    3.1  36.1   61.7   1.6430   3.7 ------	UNKNOWN                       
338.3435 -29.7706    3.5  49.4  148.0   2.9460   3.3 ------	UNKNOWN                       
 32.0772  42.9002    2.7  51.1   19.2   3.0963   4.3 ------	UNKNOWN                       
347.5982  26.4752    2.4  11.6   20.8   0.8205   4.7 ------	UNKNOWN                       
358.4001  54.2854    3.5  38.2  -11.2   0.8016   3.3 ------	UNKNOWN                       
311.9930  58.5244    2.9  43.1  -50.1   2.0279   4.0 ------	UNKNOWN

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

    Time interval of the image:
24.424000 177.700610
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
299.7762  35.1921    6.6  36.6  -87.8  -0.5776  -1.7    9.1	Cyg X-1                       
308.1897  40.8372    4.8  32.7  -74.0  -0.5376  -2.4    7.8	Cyg X-3                       
326.3730  38.3074    8.7  21.0  -55.7   0.1924   1.3    9.5	Cyg X-2                       
  5.7840  -5.6211    1.4  37.6   98.3   3.4531   8.0  483.5	UNKNOWN                       
318.5965 -15.9858    1.8  40.1  177.9   1.2657   6.3 ------	UNKNOWN                       
312.6483  17.7768    2.4  23.5 -121.2   0.6627   4.9 ------	UNKNOWN                       
304.4057   6.3190    2.5  34.7 -138.9   0.8697   4.7 ------	UNKNOWN                       
289.8006   2.2547    2.1  49.6 -135.2   3.3861   5.4 ------	UNKNOWN                       
289.1587   3.3656    2.2  49.8 -133.6   3.3744   5.3 ------	UNKNOWN                       
293.0344  28.3709    2.2  41.3  -99.9   2.8967   5.3 ------	UNKNOWN

    Post-slew image of 15-350 keV band 

    Time interval of the image: