Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time: Mon Jan 13 04:14:26 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger522656
======================================================================

  Trigger: 00522656      Segment: 000

  BAT Trigger Time: 359335335.936   [s; MET]
      Trigger Stop: 359335336.96   [s; MET]
               UTC: 2012-05-21T23:22:07.703120    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 214.28954900101   Dec: 42.1230533213039  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    13.33
     Image Trigger?:     NO
     Rate S/N Ratio:     29.4108823397055  [ if not an image trigger ]
     Image S/N Ratio:    13.33

  Analysis Position:   [ source = BAT ]
    RA: 214.28954900101   Dec: 42.1230533213039  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 214.284194866373   Dec: 42.1443201190508  [deg; J2000]  
        { 14h 17m 08.2s , +42d 08' 39.6" }
         +/- 0.999359830688837 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.370777229086415 [arcmin] (formal 1-sigma fit error)
    SNR: 30.444979184177
 
  Angular difference between the analysis and refined position is 1.298056 arcmin
 
  Partial Coding Fraction: 0.6796875    [ including projection effects ]

  Duration
     T90: 27.067999958992 +/- 4.33578045580033
        Measured from: -0.311999976634979
                   to: 26.755999982357     [s; relative to TRIGTIME]
     T50: 10.4639999270439 +/- 1.244160770219
        Measured from: 1.46000003814697
                   to: 11.9239999651909     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.184000015258789     
                   to: 1.18400001525879     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -1.03200000524521     
                   to: 31.8640000224113     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.611128   0.824805   0.498147   0.136049
           0.037596   0.039911   0.036022   0.032186 [error]
 Peak      0.062875   0.084671   0.076890   0.030050
           0.007475   0.008273   0.007773   0.006410 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100   32.896   -1.032   31.864
T90    27.068   -0.312   26.756
T50    10.464    1.460   11.924
Peak    1.000    0.184    1.184
 
 
====== 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      -1.656    -0.112      0.110       -           -               -         3.93e-03     -2.54e-04          2.52e-04      70.710   57
CPL     -1.363    -0.351      0.458      103.018     -37.638      -103.018      5.60e-03     -1.83e-03          4.04e-03      69.270   56
 
 
=== 1-s peak 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      -1.195     -0.185     0.186       -           -               -         1.64e-02     -1.62e-03          1.62e-03      71.270   57
CPL     -1.190     -0.187     0.187     9999.350    -9999.350      -9999.350      1.64e-02     -1.43e-02          -1.06e-02      71.280   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   1.91e-07  3.19e-07  4.05e-07  1.03e-06  1.20e-06  1.95e-06   erg/cm2
      90%_error_low -1.85e-08 -1.92e-08 -3.56e-08 -1.80e-07 -8.28e-08 -2.12e-07   erg/cm2
      90%_error_hi   1.90e-08  1.92e-08  3.57e-08  2.04e-07  8.37e-08  2.32e-07   erg/cm2
Peak flux       PL   5.04e-01  6.08e-01  5.31e-01  7.95e-01  1.92e+00  2.44e+00   ph/cm2/s
      90%_error_low -9.67e-02 -7.16e-02 -6.37e-02 -1.91e-01 -1.94e-01 -2.59e-01   ph/cm2/s
      90%_error_hi   1.03e-01  7.02e-02  6.26e-02  2.27e-01  1.95e-01  2.66e-01   ph/cm2/s
 
Fluence        CPL   1.83e-07  3.29e-07  4.08e-07  6.37e-07  1.17e-06  1.56e-06   erg/cm2
      90%_error_low -2.17e-08 -2.36e-08 -3.73e-08 -3.01e-07 -9.62e-08 -3.18e-07   erg/cm2
      90%_error_hi   2.20e-08  2.41e-08  3.75e-08  4.35e-07  9.64e-08  4.76e-07   erg/cm2
Peak flux      CPL   5.03e-01  6.03e-01  5.31e-01  7.91e-01  1.92e+00  2.51e+00   ph/cm2/s
      90%_error_low     N/A   -9.21e-02     N/A       N/A   -1.94e-01 -2.98e-01   ph/cm2/s
      90%_error_hi      N/A    9.93e-02     N/A       N/A    1.95e-01  2.63e-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
  214.2842    42.1443   0.0063    19.1540    95.4980         1.8104872     30.445 TRIG_00522656                 
 
Foreground time interval of the image:
 -1.032  17.365 (delta_t =  18.397 [sec])
Background time interval of the image:
-180.435  -1.032 (delta_t = 179.403 [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   -1.032 sec. to   31.864 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.65555     ( -0.111694   0.109984 )
Norm@50keV  : 3.93009E-03    ( -0.000253845   0.000251789 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          70.71 using 59 PHA bins.
# Reduced chi-squared =          1.241 for     57 degrees of freedom 
# Null hypothesis probability =   1.047589e-01
 
Photon flux (15-150 keV)    in 32.9 sec: 0.514135 ( -0.030895  0.030923 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.20206e-06 ( -8.28396e-08  8.36874e-08 ) ergs/cm2
    Cutoff power-law model
    Time interval is from   -1.032 sec. to   31.864 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.36323     ( -0.35144   0.457528 )
Epeak [keV] : 103.018      ( -37.6375 -103.018 )
Norm@50keV  : 5.59703E-03    ( -0.00183484   0.00404213 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          69.27 using 59 PHA bins.
# Reduced chi-squared =          1.237 for     56 degrees of freedom 
# Null hypothesis probability =   1.095791e-01
 
Photon flux (15-150 keV)    in 32.9 sec: 0.505939 ( -0.016533  0.032934 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.16753e-06 ( -9.61644e-08  9.63546e-08 ) ergs/cm2

    1-s peak spectrum fit

    Power-law model
    Time interval is from    0.184 sec. to    1.184 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.19519     ( -0.18501   0.186182 )
Norm@50keV  : 1.63796E-02    ( -0.00161974   0.00161915 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          71.27 using 59 PHA bins.
# Reduced chi-squared =          1.250 for     57 degrees of freedom 
# Null hypothesis probability =   9.683678e-02
 
Photon flux (15-150 keV)    in 1 sec: 1.92135 ( -0.19416  0.19465 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.66422e-07 ( -1.88208e-08  1.89738e-08 ) ergs/cm2
    Cutoff power-law model
    Time interval is from    0.184 sec. to    1.184 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.3051     ( -0.186538   0.18697 )
Epeak [keV] : 103.780      ( -9999.36 -9999.36 )
Norm@50keV  : 3.67443E-03    ( -0.00150237   0.00215446 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.41 using 59 PHA bins.
# Reduced chi-squared =          1.186 for     56 degrees of freedom 
# Null hypothesis probability =   1.608633e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.92093 ( -0.19431  0.19454 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.36204e-08 ( -3.85116e-08  8.15848e-09 ) ergs/cm2

    Time-resolved spectra




    Distribution

    T90 vs. Hardness ratio plot 

    T90                                   = 27.068 sec.
Hardness ratio (energy fluence ratio) = 1.26969693364

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

    S(15-50 keV)  = 5.104295e-07
S(50-150 keV) = 6.916215e-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 = -3.327848078866250E-02, IMY = -3.457392824339013E-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:
-180.435400 -1.032000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.5310  35.3828    4.3  40.8   44.6   1.1078   2.7    4.3	Her X-1                       
255.1457  31.6834    3.2  44.2   47.1   2.2271   3.6 ------	UNKNOWN                       
262.0384  40.0199    2.2  40.9   33.1   1.8389   5.3 ------	UNKNOWN                       
253.0335  46.7579    3.3  31.5   33.2   0.7756   3.5 ------	UNKNOWN                       
256.8369  47.5690    2.6  32.9   28.8   1.0896   4.5 ------	UNKNOWN                       
291.6799  41.8994    3.0  53.9    8.1   2.5165   3.8 ------	UNKNOWN                       
260.1969  65.7426    2.4  25.6   -6.1   0.8098   4.8 ------	UNKNOWN                       
136.7865  23.8453    3.7  57.8 -156.8   3.3612   3.1 ------	UNKNOWN

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

    Time interval of the image:
-1.032000 17.364600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.2424  35.2194    6.0  40.8   45.0   0.2559   1.9   12.9	Her X-1                       
214.2842  42.1443    0.4  19.2   95.5   1.8106  30.4 ------	UNKNOWN

    Post-slew image of 15-350 keV band 

    Time interval of the image:
58.364580 962.155200
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.5710  35.2906    7.7  31.9   24.5  -1.1249  -1.5    6.4	Her X-1                       
231.2659  38.1436    2.8  13.6   37.2   2.1098   4.1 ------	UNKNOWN                       
179.9748  14.3254    4.0  40.6  172.7   2.4520   2.9 ------	UNKNOWN                       
297.9933  46.4136    3.5  57.2   -9.7   7.9817   3.3 ------	UNKNOWN                       
150.5318  19.2332    3.2  58.0 -156.8  12.4974   3.7 ------	UNKNOWN