Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time: Fri Jan 17 19:41:56 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger414592
======================================================================

  Trigger: 00414592      Segment: 000

  BAT Trigger Time: 289252392   [s; MET]
      Trigger Stop: 289252456   [s; MET]
               UTC: 2010-03-02T19:53:06.422100    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 195.344380663184   Dec: 74.580871005255  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.73
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    7.73

  Analysis Position:   [ source = BAT ]
    RA: 195.344380663184   Dec: 74.580871005255  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 195.475242785576   Dec: 74.5692925151686  [deg; J2000]  
        { 13h 01m 54.1s , +74d 34' 09.5" }
         +/- 1.59383391749263 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.613321779602 [arcmin] (formal 1-sigma fit error)
    SNR: 15.6283814248711
 
  Angular difference between the analysis and refined position is 2.200884 arcmin
 
  Partial Coding Fraction: 0.984375    [ including projection effects ]

  Duration
     T90: 17.947999894619 +/- 1.64402065685618
        Measured from: 48.5440000295639
                   to: 66.4919999241829     [s; relative to TRIGTIME]
     T50: 11.6279999613762 +/- 2.65149015969284
        Measured from: 52.2799999713898
                   to: 63.907999932766     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 63.8719999790192     
                   to: 64.8719999790192     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 47.6439999938011     
                   to: 67.2919999957085     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.196334   0.211153   0.147379   0.001826
           0.019835   0.020709   0.018056   0.015498 [error]
 Peak      0.017478   0.023239   0.015487   0.004000
           0.004503   0.004711   0.004112   0.003402 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100   19.648   47.644   67.292
T90    17.948   48.544   66.492
T50    11.628   52.280   63.908
Peak    1.000   63.872   64.872
 
 
====== 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      -1.719    -0.196      0.190       -           -               -         1.74e-03     -2.12e-04          2.08e-04      50.020   57
CPL     -1.433    -0.645      0.756       90.170     -39.736       -90.170      2.49e-03     -9.57e-04          3.83e-03      49.480   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      -1.343     -0.392     0.396       -           -               -         3.87e-03     -8.64e-04          8.57e-04      42.600   57
CPL     -1.266     -2.683     1.611      458.973    -458.973      -458.973      4.25e-03        N/A               N/A         42.630   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   5.36e-08  8.62e-08  1.05e-07  2.50e-07  3.16e-07  4.94e-07   erg/cm2
      90%_error_low -8.39e-09 -8.98e-09 -1.73e-08 -7.51e-08 -4.00e-08 -9.35e-08   erg/cm2
      90%_error_hi   8.64e-09  8.98e-09  1.74e-08  9.44e-08  4.07e-08  1.09e-07   erg/cm2
Peak flux       PL   1.37e-01  1.51e-01  1.19e-01  1.55e-01  4.66e-01  5.63e-01   ph/cm2/s
      90%_error_low -5.09e-02 -3.68e-02 -3.33e-02 -7.39e-02 -1.03e-01 -1.28e-01   ph/cm2/s
      90%_error_hi   5.60e-02  3.58e-02  3.25e-02  1.08e-01  1.03e-01  1.33e-01   ph/cm2/s
 
Fluence        CPL   5.18e-08  8.92e-08  1.05e-07  1.52e-07  3.07e-07  3.99e-07   erg/cm2
      90%_error_low -9.50e-09 -1.07e-08 -1.82e-08 -9.98e-08 -4.42e-08 -1.12e-07   erg/cm2
      90%_error_hi   9.48e-09  1.16e-08  1.83e-08  1.86e-07  4.52e-08  1.34e-07   erg/cm2
Peak flux      CPL   1.38e-01  1.51e-01  1.19e-01  1.60e-01  4.66e-01  5.68e-01   ph/cm2/s
      90%_error_low -5.79e-02 -3.62e-02 -3.20e-02     N/A   -1.05e-01 -1.86e-01   ph/cm2/s
      90%_error_hi   4.49e-02  4.44e-02  3.62e-02     N/A    1.03e-01  1.19e-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
  195.4752    74.5693   0.0123    13.8607   -42.9273         0.5708646     15.628 TRIG_00414592                 
 
Foreground time interval of the image:
 47.644  67.292 (delta_t =  19.648 [sec])
Background time interval of the image:
-239.000  47.644 (delta_t = 286.644 [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   47.644 sec. to   67.292 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.71889     ( -0.196177   0.189532 )
Norm@50keV  : 1.73852E-03    ( -0.000211846   0.000207553 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.02 using 59 PHA bins.
# Reduced chi-squared =         0.8775 for     57 degrees of freedom 
# Null hypothesis probability =   7.321943e-01
 
Photon flux (15-150 keV)    in 19.65 sec: 0.232451 ( -0.024271  0.024275 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.15901e-07 ( -3.99563e-08  4.0749e-08 ) ergs/cm2
    Cutoff power-law model
    Time interval is from   47.644 sec. to   67.292 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.43318     ( -0.644945   0.755949 )
Epeak [keV] : 90.1700      ( -39.7601 -90.1937 )
Norm@50keV  : 2.49143E-03    ( -0.000956334   0.00383067 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.48 using 59 PHA bins.
# Reduced chi-squared =         0.8835 for     56 degrees of freedom 
# Null hypothesis probability =   7.185180e-01
 
Photon flux (15-150 keV)    in 19.65 sec: 0.229706 ( -0.025068  0.025048 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.07094e-07 ( -4.42231e-08  4.51895e-08 ) ergs/cm2

    1-s peak spectrum fit

    Power-law model
    Time interval is from   63.872 sec. to   64.872 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.34285     ( -0.392188   0.395778 )
Norm@50keV  : 3.87139E-03    ( -0.000864445   0.00085708 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          42.60 using 59 PHA bins.
# Reduced chi-squared =         0.7474 for     57 degrees of freedom 
# Null hypothesis probability =   9.220024e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.465717 ( -0.103008  0.103198 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.78765e-08 ( -9.45349e-09  9.65921e-09 ) ergs/cm2
    Cutoff power-law model
    Time interval is from   63.872 sec. to   64.872 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.33965     ( -2.67065   1.62368 )
Epeak [keV] : 9999.04      ( -9999.06 -9999.06 )
Norm@50keV  : 3.88658E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          42.60 using 59 PHA bins.
# Reduced chi-squared =         0.7607 for     56 degrees of freedom 
# Null hypothesis probability =   9.065099e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.466312 ( -0.105315  0.103023 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.78643e-08 ( 0  0 ) ergs/cm2

    Time-resolved spectra




    Distribution

    T90 vs. Hardness ratio plot 

    T90                                   = 17.948 sec.
Hardness ratio (energy fluence ratio) = 1.2151780905

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

    S(15-50 keV)  = 1.3976784e-07
S(50-150 keV) = 1.7613368e-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 = 1.806734798416724E-01, IMY = 1.680524423873691E-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:
-239.000000 47.644000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
296.8180  62.8617    4.2  47.1  -53.2   2.6049   2.8 ------	UNKNOWN                       
 10.6756  72.1211    3.2  40.8  -92.5   3.7693   3.7 ------	UNKNOWN

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

    Time interval of the image:
47.644000 67.292000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
153.0105  34.8637    2.4  31.4  115.6   0.3443   4.9 ------	UNKNOWN                       
175.5694  46.8444    2.7  20.1   74.0   0.2082   4.3 ------	UNKNOWN                       
195.4753  74.5693    0.7  13.9  -42.9   0.5708  15.6 ------	UNKNOWN                       
 96.0009  52.5609    2.2  34.7 -159.0   0.2472   5.2 ------	UNKNOWN                       
 16.5735  71.4250    2.4  40.9  -95.5   0.8070   4.8 ------	UNKNOWN

    Post-slew image of 15-350 keV band 

    Time interval of the image:
113.900600 963.090000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.3255  35.2542    5.0  48.1  -13.9   1.6396   2.3    8.4	Her X-1                       
 90.1784  41.2650    3.2  54.3  173.1   6.0410   3.7 ------	UNKNOWN                       
 99.3308  63.0376    2.9  32.2  178.5   1.7567   3.9 ------	UNKNOWN                       
 75.1602  41.7605    4.8  57.2 -173.8   5.0668   2.4 ------	UNKNOWN                       
324.7373  76.3651    3.7  26.2  -99.3   1.5143   3.2 ------	UNKNOWN                       
 62.6971  41.8989    3.5  59.4 -163.2  12.5554   3.3 ------	UNKNOWN                       
338.8454  62.2142    4.2  41.2  -98.7   7.2904   2.8 ------	UNKNOWN