Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time: Wed Jan 22 22:24:45 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger114753
======================================================================

  Trigger: 00114753      Segment: 000

  BAT Trigger Time: 135342283.968   [s; MET]
      Trigger Stop: 135342284.48   [s; MET]
               UTC: 2005-04-16T11:04:44.488360    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 188.478556551299   Dec: 21.0434055593792  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    11
     Image Trigger?:     NO
     Rate S/N Ratio:     19.2613602842582  [ if not an image trigger ]
     Image S/N Ratio:    11

  Analysis Position:   [ source = BAT ]
    RA: 188.478556551299   Dec: 21.0434055593792  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 188.47686787149   Dec: 21.0538092747204  [deg; J2000]  
        { 12h 33m 54.4s , +21d 03' 13.7" }
         +/- 1.75285249865101 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.660910674109587 [arcmin] (formal 1-sigma fit error)
    SNR: 13.6430259639745
 
  Angular difference between the analysis and refined position is 0.631345 arcmin
 
  Partial Coding Fraction: 0.1679688    [ including projection effects ]

  Duration
     T90: 6.66800001263618 +/- 3.4220859219317
        Measured from: 0.120000004768372
                   to: 6.78800001740456     [s; relative to TRIGTIME]
     T50: 1.68400001525879 +/- 0.444504214428811
        Measured from: 0.53999999165535
                   to: 2.22400000691414     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.0320000052452087     
                   to: 1.03200000524521     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.0119999945163727     
                   to: 9.43999999761581     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.569522   0.346547   0.022968  -0.006475
           0.037993   0.038010   0.031542   0.027463 [error]
 Peak      0.275511   0.204669   0.027581  -0.004014
           0.017814   0.016605   0.011445   0.008957 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100    9.452   -0.012    9.440
T90     6.668    0.120    6.788
T50     1.684    0.540    2.224
Peak    1.000    0.032    1.032
 
 
====== 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      -3.174    -0.304      0.273       -           -               -         3.34e-03     -7.97e-04          8.43e-04      60.960   57
CPL     -0.823    -1.546      2.166       14.850     -14.082         7.133      1.44e-01     -1.44e-01          5.11e+00      53.250   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      -2.836     -0.200     0.187       -           -               -         1.98e-02     -3.14e-03          3.17e-03      60.280   57
CPL      0.097     -1.192     1.878       22.692      -6.053         3.847      1.86e+00     -1.86e+00          3.40e+01      39.530   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   2.00e-07  1.35e-07  5.99e-08  3.68e-08  4.13e-07  4.32e-07   erg/cm2
      90%_error_low -2.45e-08 -2.10e-08 -1.80e-08 -1.68e-08 -5.32e-08 -6.05e-08   erg/cm2
      90%_error_hi   2.47e-08  2.06e-08  2.10e-08  2.57e-08  5.52e-08  6.62e-08   erg/cm2
Peak flux       PL   3.00e+00  1.39e+00  3.89e-01  1.36e-01  4.86e+00  4.91e+00   ph/cm2/s
      90%_error_low -3.44e-01 -1.49e-01 -7.68e-02 -4.26e-02 -4.69e-01 -4.73e-01   ph/cm2/s
      90%_error_hi   3.47e-01  1.48e-01  8.16e-02  5.38e-02  4.69e-01  4.73e-01   ph/cm2/s
 
Fluence        CPL   1.94e-07  1.53e-07  2.62e-08  5.32e-10  3.74e-07  3.74e-07   erg/cm2
      90%_error_low -2.68e-08 -2.63e-08 -1.66e-08    N/A    -4.67e-08 -4.67e-08   erg/cm2
      90%_error_hi   2.65e-08  2.66e-08  2.55e-08    N/A     5.05e-08  5.07e-08   erg/cm2
Peak flux      CPL     N/A      N/A      N/A      N/A      N/A      N/A     ph/cm2/s
      90%_error_low -3.44e-01 -1.49e-01 -7.68e-02 -4.26e-02 -4.69e-01 -4.73e-01   ph/cm2/s
      90%_error_hi   3.47e-01  1.48e-01  8.16e-02  5.38e-02  4.69e-01  4.73e-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
  188.4769    21.0538   0.0141    36.2674    79.1129         0.9455894     13.643 TRIG_00114753                 
 
Foreground time interval of the image:
 -0.012   9.333 (delta_t =   9.345 [sec])
Background time interval of the image:
-299.968  -0.012 (delta_t = 299.956 [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   -0.012 sec. to    9.440 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -3.17416     ( -0.3039   0.272504 )
Norm@50keV  : 3.33738E-03    ( -0.000797009   0.000842413 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.96 using 59 PHA bins.
# Reduced chi-squared =          1.069 for     57 degrees of freedom 
# Null hypothesis probability =   3.355056e-01
 
Photon flux (15-150 keV)    in 9.452 sec: 1.04496 ( -0.114004  0.11402 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.12861e-07 ( -5.32075e-08  5.51695e-08 ) ergs/cm2
    Cutoff power-law model
    Time interval is from   -0.012 sec. to    9.440 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.823352     ( -1.5616   2.15025 )
Epeak [keV] : 14.8495      ( -14.2426 6.97238 )
Norm@50keV  : 0.144340    ( -0.152651   5.0998 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.25 using 59 PHA bins.
# Reduced chi-squared =         0.9510 for     56 degrees of freedom 
# Null hypothesis probability =   5.794347e-01
 
Photon flux (15-150 keV)    in 9.452 sec: 1.01187 ( -0.113623  0.11388 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.73511e-07 ( -4.67021e-08  5.04967e-08 ) ergs/cm2

    1-s peak spectrum fit

    Power-law model
    Time interval is from    0.032 sec. to    1.032 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.83634     ( -0.200532   0.186671 )
Norm@50keV  : 1.98356E-02    ( -0.00314318   0.00316919 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.28 using 59 PHA bins.
# Reduced chi-squared =          1.057 for     57 degrees of freedom 
# Null hypothesis probability =   3.581407e-01
 
Photon flux (15-150 keV)    in 1 sec: 4.85682 ( -0.46862  0.4687 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.22177e-07 ( -2.38919e-08  2.42339e-08 ) ergs/cm2
    Cutoff power-law model
    Time interval is from    0.032 sec. to    1.032 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.0972727     ( -1.36841   1.70122 )
Epeak [keV] : 22.6922      ( -6.46625 3.4344 )
Norm@50keV  : 1.85712    ( -2.5168   33.3202 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          39.53 using 59 PHA bins.
# Reduced chi-squared =         0.7059 for     56 degrees of freedom 
# Null hypothesis probability =   9.532723e-01
 
Photon flux (15-150 keV)    in 1 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

    Time-resolved spectra




    Distribution

    T90 vs. Hardness ratio plot 

    T90                                   = 6.668 sec.
Hardness ratio (energy fluence ratio) = 0.443220610297

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

    S(15-50 keV)  = 3.348595e-07
S(50-150 keV) = 7.801658e-08

    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 = 1.385760221107429E-01, IMY = -7.204914652107425E-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:
-299.968000 -0.012000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
211.1648  42.3402    2.5  40.9   33.1   1.5331   4.6 ------	UNKNOWN                       
149.2186  19.7230    2.3  24.2  153.3   0.9291   5.1 ------	UNKNOWN                       
143.6562  36.2225    2.3  10.9 -166.9   0.8580   5.1 ------	UNKNOWN                       
176.6087  60.2915    2.9  21.5   -7.1   0.6519   4.1 ------	UNKNOWN                       
111.6727  -1.5350    3.0  59.0 -166.1   4.1083   3.9 ------	UNKNOWN                       
293.6117  77.6150    2.8  56.3  -28.5   4.0707   4.2 ------	UNKNOWN

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

    Time interval of the image:
-0.012000 9.332590
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
188.4769  21.0538    0.8  36.3   79.1   0.9457  13.6 ------	UNKNOWN                       
161.3095   6.4395    2.7  37.6  130.2   0.2522   4.2 ------	UNKNOWN                       
137.0235   3.8980    2.2  42.5  167.7   0.2360   5.1 ------	UNKNOWN

    Post-slew image of 15-350 keV band 

    Time interval of the image:
63.532590 302.065900
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
229.3219   6.5356    3.3  42.1   42.6   1.3705   3.6 ------	UNKNOWN                       
250.2189  36.4391    2.7  55.3   -2.0   2.2245   4.3 ------	UNKNOWN                       
190.6927  26.0788    2.6   5.4  -40.0   0.5806   4.5 ------	UNKNOWN                       
157.2431  19.7974    2.7  29.3 -148.3   0.6622   4.2 ------	UNKNOWN                       
157.4041  32.5332    3.1  29.9 -122.4   0.7169   3.7 ------	UNKNOWN                       
163.1037  43.1841    2.4  30.6  -99.4   1.0572   4.7 ------	UNKNOWN