Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time: Sun Jan 19 17:38:38 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger349450
======================================================================

  Trigger: 00349450      Segment: 000

  BAT Trigger Time: 261674408   [s; MET]
      Trigger Stop: 261674728   [s; MET]
               UTC: 2009-04-17T15:20:03.333200    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 209.706264668258   Dec: 47.000469086625  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    9.81
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    9.81

  Analysis Position:   [ source = BAT ]
    RA: 209.706264668258   Dec: 47.000469086625  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew image ]
    RA: 209.706   Dec: 47.0005  [deg; J2000]
        { 13h 58m 49.4s , +47d 00' 01.8" }
        +/- 1.85165129361 [arcmin] (estimated 90% radius based on SNR)
    SNR: 12.6167577658
 
 
  Angular difference between the analysis and refined position is 0.010988 arcmin
 
  Partial Coding Fraction: 0.9453125    [ including projection effects ]

  Duration
     T90: 266.940000027418 +/- 35.3896461975869
        Measured from: 332.803999990225
                   to: 599.744000017643     [s; relative to TRIGTIME]
     T50: 146.280000001192 +/- 30.9583074703426
        Measured from: 386.011999994516
                   to: 532.291999995708     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 409.699999988079     
                   to: 410.699999988079     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 318.375999987125     
                   to: 627.743999987841     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.452705   1.437020   1.039667   0.241893
           0.084908   0.087772   0.077696   0.068468 [error]
 Peak      0.017143   0.013875   0.007839   0.004109
           0.004912   0.005006   0.004361   0.003855 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100  309.368  318.376  627.744
T90   266.940  332.804  599.744
T50   146.280  386.012  532.292
Peak    1.000  409.700  410.700
 
 
====== 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      -1.814    -0.137      0.134       -           -               -         7.67e-04     -5.98e-05          5.88e-05      60.810   57
CPL     -2.303    -0.139      0.549      112.858      N/A           N/A         4.45e-04        N/A               N/A         58.610   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      -1.980     -0.810     0.722       -           -               -         1.97e-03     -1.03e-03          9.95e-04      72.690   57
CPL     -2.024      7.189     2.024       11.795      11.116        17.366      1.78e-03     -1.78e-03          7.58e+06      72.640   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   4.07e-07  6.18e-07  7.03e-07  1.53e-06  2.18e-06  3.25e-06   erg/cm2
      90%_error_low -4.39e-08 -4.08e-08 -7.71e-08 -3.26e-07 -1.72e-07 -3.99e-07   erg/cm2
      90%_error_hi   4.52e-08  4.08e-08  7.76e-08  3.84e-07  1.75e-07  4.45e-07   erg/cm2
Peak flux       PL   1.29e-01  9.78e-02  4.96e-02  3.60e-02  2.93e-01  3.12e-01   ph/cm2/s
      90%_error_low -6.33e-02 -3.83e-02 -3.04e-02 -3.60e-02 -1.10e-01 -1.21e-01   ph/cm2/s
      90%_error_hi   6.43e-02  3.74e-02  3.57e-02  7.18e-02  1.10e-01  1.25e-01   ph/cm2/s
 
Fluence        CPL   4.00e-07  5.23e-07  4.47e-07  1.52e-06  1.91e-06  3.25e-06   erg/cm2
      90%_error_low -4.85e-08 -8.13e-08 -1.93e-07    N/A    -2.31e-07 -5.22e-07   erg/cm2
      90%_error_hi   3.66e-08  5.42e-08  1.35e-07    N/A     1.98e-07  4.49e-07   erg/cm2
Peak flux      CPL   1.27e-01  9.66e-02  5.12e-02  4.67e-02  2.93e-01  3.17e-01   ph/cm2/s
      90%_error_low -7.82e-02 -5.90e-02 -3.17e-02 -2.84e-02 -1.79e-01 -1.21e-01   ph/cm2/s
      90%_error_hi   6.59e-02  3.70e-02  1.88e-02  1.46e-02  1.11e-01  1.21e-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
209.706 47.001 0.000 18.903 18.099 3.995 12.617 TRIG_00349450
 
Image time interval: -239.000 to 336.000 [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  318.376 sec. to  627.744 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.81356     ( -0.137419   0.1341 )
Norm@50keV  : 7.66940E-04    ( -5.98188e-05   5.87748e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.81 using 59 PHA bins.
# Reduced chi-squared =          1.067 for     57 degrees of freedom 
# Null hypothesis probability =   3.404404e-01
 
Photon flux (15-150 keV)    in 309.4 sec: 0.106249 ( -0.0071166  0.00713 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.18389e-06 ( -1.72108e-07  1.74582e-07 ) ergs/cm2
    Cutoff power-law model
    Time interval is from  318.376 sec. to  627.744 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.30284     ( -0.139141   0.54945 )
Epeak [keV] : 112.858      (   )
Norm@50keV  : 4.45188E-04    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.61 using 59 PHA bins.
# Reduced chi-squared =          1.047 for     56 degrees of freedom 
# Null hypothesis probability =   3.800376e-01
 
Photon flux (15-150 keV)    in 309.4 sec: 8.99767E-02 ( -0.0147384  0.0122453 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.90823e-06 ( -2.30852e-07  1.97733e-07 ) ergs/cm2

    1-s peak spectrum fit

    Power-law model
    Time interval is from  409.700 sec. to  410.700 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.98042     ( -0.809983   0.722189 )
Norm@50keV  : 1.97128E-03    ( -0.00102612   0.000995049 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          72.69 using 59 PHA bins.
# Reduced chi-squared =          1.275 for     57 degrees of freedom 
# Null hypothesis probability =   7.863088e-02
 
Photon flux (15-150 keV)    in 1 sec: 0.293082 ( -0.110281  0.110406 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.81648e-08 ( -8.37779e-09  9.56649e-09 ) ergs/cm2
    Cutoff power-law model
    Time interval is from  409.700 sec. to  410.700 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 10     ( -4.83481   -10 )
Epeak [keV] : 25.8499      ( -2.9396 3.31049 )
Norm@50keV  : 1.87277E+06    ( -1.87174e+06   5.70589e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          63.81 using 59 PHA bins.
# Reduced chi-squared =          1.140 for     56 degrees of freedom 
# Null hypothesis probability =   2.209794e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.292941 ( -0.178655  0.111112 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.89671e-08 ( -1.551e-08  6.79374e-09 ) 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 = 0.325497189204, IMY = -0.10638003043

    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:
-239.000000 318.376000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.4731  35.4002    4.7  53.3    5.0   2.8492   2.5    3.5	Her X-1                       
209.6969  47.0072    1.0  18.9   18.1   3.7318  12.1 ------	UNKNOWN                       
215.8100  55.3435    2.8  21.1   -8.2   1.3152   4.2 ------	UNKNOWN                       
111.7201  31.4564    3.2  53.7 -154.4   3.6750   3.6 ------	UNKNOWN                       
294.8754  75.1889    3.4  47.0  -53.0   6.0351   3.4 ------	UNKNOWN

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

    Time interval of the image:
318.376000 336.100590
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.4949  35.2991    3.8  53.4    5.0   0.5001   3.1    3.2	Her X-1                       
275.5954  88.9970    1.9  39.5  -70.1   0.6801   6.1 ------	UNKNOWN

    Post-slew image of 15-350 keV band 

    Time interval of the image:
376.100590 963.095200
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.4220  35.3145    1.2  35.1   -1.4   4.2340   9.3    2.4	Her X-1                       
158.6473  34.1156    2.7  40.1  175.8   1.9586   4.3 ------	UNKNOWN                       
209.6975  47.0107    0.7   0.0 -156.4   5.0072  16.3 ------	UNKNOWN                       
136.9516  30.0991    3.2  57.2 -173.8   5.4999   3.6 ------	UNKNOWN                       
252.9744  51.2439    2.9  28.2  -29.2   1.3404   3.9 ------	UNKNOWN                       
128.1843  35.8053    3.5  59.4 -163.2   9.1257   3.3 ------	UNKNOWN