Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time: Sat Oct  4 21:25:56 EDT 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger604232
======================================================================

  Trigger: 00604232      Segment: 000

  BAT Trigger Time: 426969837.376   [s; MET]
      Trigger Stop: 426969837.888   [s; MET]
               UTC: 2014-07-13T18:43:45.115400    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 281.114083816983   Dec: 59.6247281361308  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    11.98
     Image Trigger?:     NO
     Rate S/N Ratio:     31.6069612585582  [ if not an image trigger ]
     Image S/N Ratio:    11.98

  Analysis Position:   [ source = BAT ]
    RA: 281.114083816983   Dec: 59.6247281361308  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 281.141369040742   Dec: 59.6226563752735  [deg; J2000]  
        { 18h 44m 33.9s , +59d 37' 21.6" }
         +/- 1.17974812009679 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.500289176102019 [arcmin] (formal 1-sigma fit error)
    SNR: 24.0194050398082
 
  Angular difference between the analysis and refined position is 0.837131 arcmin
 
  Partial Coding Fraction: 0.9765625    [ including projection effects ]

  Duration
     T90: 6.01599997282028 +/- 0.728065956518166
        Measured from: 0.0360000133514404
                   to: 6.05199998617172     [s; relative to TRIGTIME]
     T50: 3.41999989748001 +/- 0.700139972863795
        Measured from: 0.548000037670135
                   to: 3.96799993515015     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.107999980449677     
                   to: 0.892000019550323     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.107999980449677     
                   to: 6.67599999904633     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.229241   0.272784   0.135592   0.034707
           0.016392   0.016965   0.014456   0.011646 [error]
 Peak      0.060167   0.098787   0.065418   0.015238
           0.006960   0.007579   0.006687   0.004920 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100    6.784   -0.108    6.676
T90     6.016    0.036    6.052
T50     3.420    0.548    3.968
Peak    1.000   -0.108    0.892
 
 
====== 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      -1.843    -0.141      0.138       -           -               -         5.86e-03     -5.19e-04          5.11e-04      79.230   57
CPL     -1.816    -0.461      0.527      296.903      N/A           N/A         6.07e-03        N/A               N/A         79.220   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      -1.458     -0.154     0.153       -           -               -         1.56e-02     -1.45e-03          1.45e-03      60.400   57
CPL     -1.233     -0.315     0.608      164.062    -164.062      -164.062      2.06e-02     -6.98e-03          2.18e-02      59.910   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   7.01e-08  1.05e-07  1.17e-07  2.46e-07  3.66e-07  5.37e-07   erg/cm2
      90%_error_low -7.84e-09 -7.79e-09 -1.40e-08 -5.52e-08 -3.23e-08 -7.03e-08   erg/cm2
      90%_error_hi   8.01e-09  7.80e-09  1.42e-08  6.54e-08  3.27e-08  7.81e-08   erg/cm2
Peak flux       PL   6.18e-01  6.38e-01  4.64e-01  5.42e-01  1.93e+00  2.26e+00   ph/cm2/s
      90%_error_low -9.18e-02 -6.07e-02 -5.42e-02 -1.18e-01 -1.75e-01 -2.09e-01   ph/cm2/s
      90%_error_hi   9.51e-02  6.03e-02  5.39e-02  1.37e-01  1.75e-01  2.11e-01   ph/cm2/s
 
Fluence        CPL   6.99e-08  1.05e-07  1.17e-07  2.33e-07  3.65e-07  5.25e-07   erg/cm2
      90%_error_low -8.41e-09 -8.13e-09 -1.44e-08 -1.44e-07 -3.87e-08 -1.51e-07   erg/cm2
      90%_error_hi   8.31e-09  1.03e-08  1.42e-08  5.13e-08  3.35e-08  1.34e-07   erg/cm2
Peak flux      CPL   5.98e-01  6.54e-01  4.72e-01  4.04e-01  1.92e+00  2.13e+00   ph/cm2/s
      90%_error_low -1.04e-01 -7.07e-02 -5.77e-02 -2.03e-01 -1.78e-01 -2.76e-01   ph/cm2/s
      90%_error_hi   1.06e-01  7.46e-02  5.91e-02  1.77e-01  1.78e-01  2.65e-01   ph/cm2/s
 
======================================================================




Image

Pre-slew 15.0-350.0 keV image (Event data)

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  281.1414    59.6227   0.0080    19.2825    -6.4141         0.7235869     24.019 TRIG_00604232                 
 
Foreground time interval of the image:
 -0.108   6.676 (delta_t =   6.784 [sec])
Background time interval of the image:
-232.475  -0.108 (delta_t = 232.367 [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   -0.108 sec. to    6.676 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.84272     ( -0.141285   0.137866 )
Norm@50keV  : 5.86057E-03    ( -0.000518551   0.000510705 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          79.23 using 59 PHA bins.
# Reduced chi-squared =          1.390 for     57 degrees of freedom 
# Null hypothesis probability =   2.737405e-02
 
Photon flux (15-150 keV)    in 6.784 sec: 0.821385 ( -0.061774  0.061798 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.65667e-07 ( -3.22899e-08  3.27389e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.108 sec. to    6.676 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.81641     ( -0.460424   0.526994 )
Epeak [keV] : 296.903      (   )
Norm@50keV  : 6.06802E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          79.22 using 59 PHA bins.
# Reduced chi-squared =          1.415 for     56 degrees of freedom 
# Null hypothesis probability =   2.224400e-02
 
Photon flux (15-150 keV)    in 6.784 sec: 0.820513 ( -0.0638  0.062449 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.64532e-07 ( -3.8706e-08  3.35071e-08 ) ergs/cm2
 

1-s peak spectrum fit

Power-law model
Time interval is from   -0.108 sec. to    0.892 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.45831     ( -0.154072   0.153052 )
Norm@50keV  : 1.56299E-02    ( -0.00145405   0.00144564 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.40 using 59 PHA bins.
# Reduced chi-squared =          1.060 for     57 degrees of freedom 
# Null hypothesis probability =   3.538872e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.93022 ( -0.1747  0.1748 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.49359e-07 ( -1.53481e-08  1.55218e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.108 sec. to    0.892 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.23269     ( -0.315473   0.608102 )
Epeak [keV] : 164.062      ( -164.065 -164.065 )
Norm@50keV  : 2.05548E-02    ( -0.00698281   0.0218212 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.91 using 59 PHA bins.
# Reduced chi-squared =          1.070 for     56 degrees of freedom 
# Null hypothesis probability =   3.359586e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.91531 ( -0.17845  0.17833 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.4647e-07 ( -1.7113e-08  1.69405e-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 = 3.476618081882924E-01, IMY = 3.908299903426914E-02

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:
-232.475400 -0.108000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.5010  35.3674   99.0  14.6  116.7  -0.0250  -0.1    2.6	Her X-1                       
299.5915  35.2156    1.2  37.3   39.7   3.8961   9.7    0.8	Cyg X-1                       
308.0847  40.9501    2.3  39.5   26.0   1.8611   4.9    1.2	Cyg X-3                       
326.0415  38.4416    0.0  52.2   17.7  -2.0285  -2.6    9.4	Cyg X-2                       
251.7967  52.8548    3.1   3.0  -56.0   0.7028   3.7 ------	UNKNOWN                       
288.1304  60.7790    2.5  22.9   -7.1   0.9622   4.6 ------	UNKNOWN                       
211.4953  23.4468    2.6  41.0 -169.9   1.4195   4.4 ------	UNKNOWN                       
342.2398  67.8101    2.9  45.1  -22.6   1.4403   4.0 ------	UNKNOWN                       

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

Time interval of the image:
-0.108000 6.676000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.2039  35.3866    0.0  14.6  117.7   0.0571   1.7   12.7	Her X-1                       
299.4219  35.2151    3.5  37.2   39.9   0.2059   3.3    8.3	Cyg X-1                       
308.3002  40.9345    7.5  39.6   25.9  -0.0925  -1.5    8.7	Cyg X-3                       
326.2380  38.2814    8.8  52.4   17.7  -0.1973  -1.3    3.9	Cyg X-2                       
244.4540   3.1140    2.2  47.2  135.3   0.7754   5.2 ------	UNKNOWN                       
234.3331   6.3573    2.4  45.9  149.8   0.4271   4.8 ------	UNKNOWN                       
328.1057  40.4909    2.3  52.2   14.4   0.6045   5.0 ------	UNKNOWN                       
328.8664  40.9995    1.8  52.3   13.4   0.7643   6.5 ------	UNKNOWN                       
281.1414  59.6227    0.5  19.3   -6.4   0.7236  24.0 ------	UNKNOWN                       
198.1105  15.3003    2.5  55.3 -163.7   0.4485   4.7 ------	UNKNOWN                       
189.4874  20.6794    2.2  56.7 -152.0   0.8825   5.3 ------	UNKNOWN                       

Post-slew image of 15-350 keV band

Time interval of the image:
57.124600 962.645500
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.3366  35.4438    6.8  29.8  149.0   1.4877   1.7    8.5	Her X-1                       
299.6127  35.2094    0.6  27.2   66.8  16.0016  19.4    1.2	Cyg X-1                       
308.0687  40.9946    1.7  25.0   47.4   5.1274   6.9    3.1	Cyg X-3                       
326.0561  38.4576    6.4  35.2   27.8   1.6134   1.8    9.8	Cyg X-2                       
246.4775  36.4639    2.4  32.1  160.7   4.1978   4.7 ------	UNKNOWN                       
354.3413  37.9714    2.7  49.8    2.7   6.0248   4.3 ------	UNKNOWN                       
  2.1146  34.1192    2.8  56.7   -0.5  11.2084   4.2 ------	UNKNOWN                       
353.1772  48.8426    3.0  41.2   -6.9   3.4563   3.8 ------	UNKNOWN                       
 18.3603  40.2213    3.9  59.4  -17.1  13.6595   3.0 ------	UNKNOWN                       
200.6303  31.2551    4.7  58.7 -159.2  13.5458   2.5 ------	UNKNOWN                       
 55.0507  71.6849    3.0  44.9  -60.0  12.0660   3.8 ------	UNKNOWN