Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time: Wed Jan 22 23:06:34 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger104298
======================================================================

  Trigger: 00104298      Segment: 000

  BAT Trigger Time: 129008114.176   [s; MET]
      Trigger Stop: 129008114.304   [s; MET]
               UTC: 2005-02-02T03:35:14.800740    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 290.560534826378   Dec: -38.7202927722526  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8
     Image Trigger?:     NO
     Rate S/N Ratio:     17.606816861659  [ if not an image trigger ]
     Image S/N Ratio:    8

  Analysis Position:   [ source = BAT ]
    RA: 290.560534826378   Dec: -38.7202927722526  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 290.585434586058   Dec: -38.7303858786776  [deg; J2000]  
        { 19h 22m 20.5s , -38d 43' 49.4" }
         +/- 2.22749690614904 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.11671018228696 [arcmin] (formal 1-sigma fit error)
    SNR: 9.68805944614796
 
  Angular difference between the analysis and refined position is 1.313474 arcmin
 
  Partial Coding Fraction: 0.578125    [ including projection effects ]

  Duration
     T90: 0.112000018358231 +/- 0.0312410085941713
        Measured from: 0.0119999945163727
                   to: 0.124000012874603     [s; relative to TRIGTIME]
     T50: 0.0520000010728836 +/- 0.0200000077486047
        Measured from: 0.0400000065565109
                   to: 0.0920000076293945     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.429999992251396     
                   to: 0.570000007748604     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0.00400000810623169     
                   to: 0.131999999284744     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.010408   0.018744   0.018943   0.002846
           0.003239   0.003124   0.002709   0.002045 [error]
 Peak      0.022982   0.027644   0.016371   0.005273
           0.008134   0.006872   0.005580   0.004475 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100    0.128    0.004    0.132
T90     0.112    0.012    0.124
T50     0.052    0.040    0.092
Peak    1.000   -0.430    0.570
 
 
====== 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      -1.376    -0.290      0.294       -           -               -         2.51e-02     -4.36e-03          4.36e-03      41.960   57
CPL     -0.319    -1.180      1.915       84.258     -23.347       -84.258      8.04e-02     -8.04e-02          5.41e-01      40.300   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      -1.459     -0.543     0.572       -           -               -         4.67e-03     -1.28e-03          1.27e-03      59.290   57
CPL     -1.477     -0.527     0.596     9999.360    -9999.360      -9999.360      4.65e-03     -1.25e-03          2.29e-02      59.300   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   3.65e-09  7.24e-09  1.11e-08  3.76e-08  3.12e-08  5.96e-08   erg/cm2
      90%_error_low -1.10e-09 -1.43e-09 -2.31e-09 -1.44e-08 -5.77e-09 -1.64e-08   erg/cm2
      90%_error_hi   1.21e-09  1.40e-09  2.28e-09  1.93e-08  5.81e-09  2.03e-08   erg/cm2
Peak flux       PL   1.85e-01  1.90e-01  1.39e-01  1.62e-01  5.77e-01  6.75e-01   ph/cm2/s
      90%_error_low -9.39e-02 -6.42e-02 -4.73e-02 -9.31e-02 -1.69e-01 -1.84e-01   ph/cm2/s
      90%_error_hi   1.11e-01  6.01e-02  4.54e-02  1.58e-01  1.71e-01  1.84e-01   ph/cm2/s
 
Fluence        CPL   2.94e-09  7.91e-09  1.21e-08  1.16e-08  2.95e-08  3.46e-08   erg/cm2
      90%_error_low -1.35e-09 -1.71e-09 -2.72e-09 -8.66e-09 -6.29e-09 -1.07e-08   erg/cm2
      90%_error_hi   1.50e-09  1.82e-09  2.83e-09  3.17e-08  6.29e-09  1.75e-08   erg/cm2
Peak flux      CPL   1.85e-01  1.91e-01  1.37e-01  1.61e-01  5.80e-01  6.84e-01   ph/cm2/s
      90%_error_low     N/A   -6.50e-02 -4.62e-02     N/A   -1.74e-01 -1.94e-01   ph/cm2/s
      90%_error_hi      N/A    6.05e-02  4.75e-02     N/A    1.69e-01  1.73e-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
      290.5854   -38.7304   0.0198    25.6970   -75.4924         0.0558499      9.688 TRIG_00104298                 
     
    Foreground time interval of the image:
      0.004   0.132 (delta_t =   0.128 [sec])
    Background time interval of the image:
    -299.176   0.004 (delta_t = 299.180 [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    0.004 sec. to    0.132 sec.
     
    Spectral model in power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: -1.37638     ( -0.290449   0.294023 )
    Norm@50keV  : 2.50761E-02    ( -0.00436356   0.00436279 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          41.96 using 59 PHA bins.
    # Reduced chi-squared =         0.7362 for     57 degrees of freedom 
    # Null hypothesis probability =   9.320917e-01
     
    Photon flux (15-150 keV)    in 0.128 sec: 3.03786 ( -0.5556  0.55913 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 3.11724e-08 ( -5.76672e-09  5.80535e-09 ) ergs/cm2
     
    
    Cutoff power-law model
    Time interval is from    0.004 sec. to    0.132 sec.
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: -0.318996     ( -1.18016   1.91479 )
    Epeak [keV] : 84.2583      ( -23.3435 -84.2551 )
    Norm@50keV  : 8.03877E-02    ( -0.080397   0.541368 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          40.30 using 59 PHA bins.
    # Reduced chi-squared =         0.7196 for     56 degrees of freedom 
    # Null hypothesis probability =   9.436140e-01
     
    Photon flux (15-150 keV)    in 0.128 sec: 2.90802 ( -0.58438  0.58588 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 2.94687e-08 ( -6.291e-09  6.29153e-09 ) ergs/cm2
     
    

    1-s peak spectrum fit

    Power-law model
    Time interval is from   -0.430 sec. to    0.570 sec.
     
    Spectral model in power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: -1.45937     ( -0.543132   0.572321 )
    Norm@50keV  : 4.66719E-03    ( -0.00127513   0.00127167 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          59.29 using 59 PHA bins.
    # Reduced chi-squared =          1.040 for     57 degrees of freedom 
    # Null hypothesis probability =   3.920028e-01
     
    Photon flux (15-150 keV)    in 1 sec: 0.576527 ( -0.168874  0.170913 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 4.45913e-08 ( -1.30442e-08  1.32609e-08 ) ergs/cm2
     
    
    Cutoff power-law model
    Time interval is from   -0.430 sec. to    0.570 sec.
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: -1.47655     ( -0.52847   0.594153 )
    Epeak [keV] : 9999.36      ( -9999.36 -9999.36 )
    Norm@50keV  : 4.64527E-03    ( -0.00127802   0.0228607 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          59.30 using 59 PHA bins.
    # Reduced chi-squared =          1.059 for     56 degrees of freedom 
    # Null hypothesis probability =   3.561282e-01
     
    Photon flux (15-150 keV)    in 1 sec: 0.580059 ( -0.174074  0.169262 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 4.49707e-08 ( -1.64001e-08  1.59409e-08 ) ergs/cm2
     
    

    Time-resolved spectra




    Distribution

    T90 vs. Hardness ratio plot

    T90                                   = 0.112 sec.
    Hardness ratio (energy fluence ratio) = 1.54081350444
    

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

    S(15-50 keV)  = 1.088567e-08
    S(50-150 keV) = 2.0286686e-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 = 1.205452569865317E-01, IMY = 4.658595688132238E-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:
    -299.176000 0.004000
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
    186.8925 -62.8407    8.1  46.3   43.0   1.4861   1.4    7.7	GX 301-2                      
    244.9804 -15.6467    0.2  26.6  159.6  21.3837  74.8    0.4	Sco X-1                       
    255.9502 -37.8312    2.0   2.4  162.9   1.4530   5.8    1.9	4U 1700-377                   
    256.4260 -36.4179    1.5   3.7  177.1   1.9314   7.4    0.6	GX 349+2                      
    263.0578 -24.7435    4.6  16.1 -153.8   0.6872   2.5    2.7	GX 1+4                        
    264.6839 -44.3529    7.6   7.0  -43.2   0.3580   1.5    6.4	4U 1735-44                    
    268.5192  -1.5606    6.0  39.9 -155.6  -0.7659  -1.9   11.1	SW J1753.5-0127               
    270.3545 -25.1414    4.4  18.5 -133.0   0.8093   2.6    5.3	GX 5-1                        
    270.3518 -25.7248    3.3  18.1 -132.0   1.1341   3.8    2.9	GRS 1758-258                  
    273.9708 -14.0495    1.8  29.9 -139.2   2.1338   6.4    2.2	GX 17+2                       
    276.1103 -30.3749    7.6  18.2 -109.7   0.3979   1.5    9.6	H1820-303                     
    284.8339 -24.8454   19.7  27.7 -108.3   0.2084   0.6   11.9	HT1900.1-2455                 
    262.8904 -33.9178    4.8   7.6 -135.1   0.6077   2.4    7.0	GX 354-0                      
    238.7673 -43.7312    3.2  14.2   75.5   0.9021   3.7 ------	UNKNOWN                       
    243.0431 -26.5425    3.0  17.9  141.3   0.8541   3.8 ------	UNKNOWN                       
    296.1554 -54.7085    3.1  29.6  -40.7   1.0868   3.8 ------	UNKNOWN                       
    331.2291 -51.2298    3.4  50.7  -44.5   4.9938   3.4 ------	UNKNOWN                       
    

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

    Time interval of the image:
    0.004000 0.132000
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
    186.3713 -62.7255    3.7  46.6   43.2   0.0473   3.2    8.3	GX 301-2                      
    244.8387 -15.6167   12.0  26.7  159.3   0.0044   1.0    8.3	Sco X-1                       
    255.7789 -37.7100    0.0   2.6  161.2   0.0027   0.7   12.7	4U 1700-377                   
    256.2605 -36.5143   25.0   3.6  174.8   0.0018   0.5   10.1	GX 349+2                      
    262.8809 -24.9143    0.0  15.9 -154.2   0.0025   0.6   12.3	GX 1+4                        
    264.9417 -44.3986    4.8   7.2  -43.8   0.0095   2.4    9.1	4U 1735-44                    
    268.3671  -1.5014    5.7  39.9 -155.8   0.0122   2.0    2.9	SW J1753.5-0127               
    270.2838 -25.0789   26.5  18.6 -133.3  -0.0018  -0.4    0.0	GX 5-1                        
    270.3176 -25.7226 2529.6  18.0 -132.0   0.0000   0.0    1.5	GRS 1758-258                  
    274.0800 -13.8788    4.8  30.1 -139.1  -0.0125  -2.4   10.4	GX 17+2                       
    275.7891 -30.4875    8.2  17.9 -109.9   0.0063   1.4   10.1	H1820-303                     
    285.0954 -24.7913    3.6  27.9 -108.1  -0.0184  -3.2    8.4	HT1900.1-2455                 
    263.1574 -33.7697    6.6   7.9 -134.3   0.0068   1.7    9.3	GX 354-0                      
    212.9994 -23.7572    2.0  40.4  106.7   0.0817   5.7 ------	UNKNOWN                       
    254.5335 -78.7237    2.4  38.7    7.4   0.0275   4.8 ------	UNKNOWN                       
    290.5836 -38.7265    1.2  25.7  -75.5   0.0558   9.7 ------	UNKNOWN                       
    

    Post-slew image of 15-350 keV band

    Time interval of the image:
    -299.176000 242.846100
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
    186.8566 -62.8151    5.8  46.4   43.1   3.6804   2.0    6.1	GX 301-2                      
    244.9800 -15.6456    0.1  26.6  159.6  45.0411  88.9    0.3	Sco X-1                       
    255.9596 -37.8329    1.4   2.4  163.1   3.8403   8.4    1.4	4U 1700-377                   
    256.4210 -36.4211    1.9   3.7  177.0   2.8524   6.1    0.7	GX 349+2                      
    263.1124 -24.8816    7.0  16.0 -153.5   0.7916   1.6    9.9	GX 1+4                        
    264.9085 -44.2823   10.0   7.1  -44.4   0.4564   1.2   12.3	4U 1735-44                    
    268.5129  -1.5100    5.2  39.9 -155.6  -1.5757  -2.2    9.3	SW J1753.5-0127               
    270.3197 -25.0771    5.9  18.6 -133.2   1.0846   2.0    1.9	GX 5-1                        
    270.3369 -25.7583    3.5  18.0 -131.9   1.7802   3.3    2.1	GRS 1758-258                  
    273.9808 -14.0444    1.8  29.9 -139.2   3.8192   6.5    1.5	GX 17+2                       
    276.0483 -30.3903    6.6  18.1 -109.8   0.7944   1.8    6.5	H1820-303                     
    284.8243 -24.8465   33.9  27.7 -108.3   0.2096   0.3   12.4	HT1900.1-2455                 
    262.8863 -33.8993    4.1   7.7 -135.2   1.2650   2.8    6.4	GX 354-0                      
    235.8955   5.2523    2.7  49.4  158.1   5.9288   4.2 ------	UNKNOWN                       
    299.8587 -62.4744    3.1  33.8  -27.7   2.0088   3.8 ------	UNKNOWN