Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time: Sun Jun 14 23:49:41 EDT 2015
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger424031
======================================================================

  Trigger: 00424031      Segment: 000

  BAT Trigger Time: 297544367.68   [s; MET]
      Trigger Stop: 297544368.704   [s; MET]
               UTC: 2010-06-06T19:12:41.811980    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 350.602673888059   Dec: -66.2356003010438  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    10.64
     Image Trigger?:     NO
     Rate S/N Ratio:     46.9361268108053  [ if not an image trigger ]
     Image S/N Ratio:    10.64

  Analysis Position:   [ source = BAT ]
    RA: 350.602673888059   Dec: -66.2356003010438  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 350.607507123397   Dec: -66.231681564971  [deg; J2000]  
        { 23h 22m 25.8s , -66d 13' 54.1" }
         +/- 1.08849276807616 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.427087203964259 [arcmin] (formal 1-sigma fit error)
    SNR: 26.9470019849876
 
  Angular difference between the analysis and refined position is 0.262568 arcmin
 
  Partial Coding Fraction: 0.25    [ including projection effects ]

  Duration
     T90: 67.3839999437332 +/- 6.31425182588449
        Measured from: 0.708000004291534
                   to: 68.0919999480247     [s; relative to TRIGTIME]
     T50: 33.0079999566078 +/- 2.46107695093719
        Measured from: 8.09999996423721
                   to: 41.107999920845     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.195999979972839     
                   to: 1.19599997997284     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.259999990463257     
                   to: 82.9279999732971     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.410015   2.546380   2.612737   1.106689
           0.093764   0.094790   0.086677   0.080970 [error]
 Peak      0.060247   0.142463   0.184252   0.076992
           0.015710   0.017462   0.017549   0.016198 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100   83.188   -0.260   82.928
T90    67.384    0.708   68.092
T50    33.008    8.100   41.108
Peak    1.000    0.196    1.196
 
 
====== 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      -1.160    -0.072      0.073       -           -               -         6.58e-03     -2.58e-04          2.57e-04      40.870   57
CPL     -1.155    -0.072      0.074     9998.380    -9998.380      -9998.380      6.61e-03     -2.55e-04          1.31e-03      40.910   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      -0.923     -0.204     0.213       -           -               -         3.28e-02     -4.07e-03          4.01e-03      53.210   57
CPL     -0.687     -0.410     1.088      349.157    -349.157      -349.157      4.09e-02     -1.14e-02          6.62e-02      52.790   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   5.09e-07  1.15e-06  2.06e-06  8.71e-06  5.62e-06  1.24e-05   erg/cm2
      90%_error_low -4.30e-08 -5.76e-08 -8.64e-08 -8.47e-07 -2.23e-07 -8.80e-07   erg/cm2
      90%_error_hi   4.45e-08  5.73e-08  8.60e-08  9.13e-07  2.23e-07  9.35e-07   erg/cm2
Peak flux       PL   7.79e-01  1.11e+00  1.17e+00  2.28e+00  3.77e+00  5.33e+00   ph/cm2/s
      90%_error_low -1.97e-01 -1.82e-01 -1.38e-01 -5.39e-01 -4.67e-01 -6.48e-01   ph/cm2/s
      90%_error_hi   2.19e-01  1.79e-01  1.37e-01  6.41e-01  4.71e-01  6.67e-01   ph/cm2/s
 
Fluence        CPL   5.18e-07  1.15e-06  2.05e-06  8.90e-06  5.64e-06  1.24e-05   erg/cm2
      90%_error_low    N/A    -6.42e-08 -8.18e-08 -2.29e-06 -2.43e-07 -1.86e-06   erg/cm2
      90%_error_hi     N/A     6.58e-08  1.22e-07  -2.56e-07  2.02e-07  5.44e-07   erg/cm2
Peak flux      CPL   7.00e-01  1.11e+00  1.22e+00  1.71e+00  3.71e+00  4.74e+00   ph/cm2/s
      90%_error_low -2.60e-01 -1.90e-01 -1.76e-01 -8.32e-01 -4.77e-01 -1.02e+00   ph/cm2/s
      90%_error_hi   2.76e-01  1.89e-01  1.90e-01  7.49e-01  4.88e-01  9.80e-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
  350.6075   -66.2317   0.0071    48.8628  -154.3548         3.4436743     26.947 TRIG_00424031                 
 
Foreground time interval of the image:
 -0.260  15.221 (delta_t =  15.481 [sec])
Background time interval of the image:
-389.179 -346.667 (delta_t =  42.512 [sec])
-239.680  -0.260 (delta_t = 239.420 [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   -0.260 sec. to   82.928 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.16005     ( -0.0720535   0.0728539 )
Norm@50keV  : 6.58150E-03    ( -0.000258326   0.000257186 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          40.87 using 59 PHA bins.
# Reduced chi-squared =         0.7170 for     57 degrees of freedom 
# Null hypothesis probability =   9.472247e-01
 
Photon flux (15-150 keV)    in 83.19 sec: 0.768473 ( -0.032411  0.032581 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.62006e-06 ( -2.22702e-07  2.23012e-07 ) ergs/cm2
    Cutoff power-law model
    Time interval is from   -0.260 sec. to   82.928 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.15547     ( -0.0721896   0.0737509 )
Epeak [keV] : 9998.38      ( -9998.74 -9998.74 )
Norm@50keV  : 6.61464E-03    ( -0.000255107   0.00130794 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          40.91 using 59 PHA bins.
# Reduced chi-squared =         0.7305 for     56 degrees of freedom 
# Null hypothesis probability =   9.350274e-01
 
Photon flux (15-150 keV)    in 83.19 sec: 0.772785 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.63938e-06 ( -2.43386e-07  2.01946e-07 ) ergs/cm2

    1-s peak spectrum fit

    Power-law model
    Time interval is from    0.196 sec. to    1.196 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.922682     ( -0.204126   0.21325 )
Norm@50keV  : 3.28031E-02    ( -0.00407432   0.00401251 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.21 using 59 PHA bins.
# Reduced chi-squared =         0.9335 for     57 degrees of freedom 
# Null hypothesis probability =   6.180511e-01
 
Photon flux (15-150 keV)    in 1 sec: 3.76618 ( -0.46738  0.47051 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.64981e-07 ( -4.35705e-08  4.36582e-08 ) ergs/cm2
    Cutoff power-law model
    Time interval is from    0.196 sec. to    1.196 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.68699     ( -0.45531   1.04273 )
Epeak [keV] : 349.157      ( -265.42 -265.42 )
Norm@50keV  : 4.08781E-02    ( -0.0153193   0.0623337 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.79 using 59 PHA bins.
# Reduced chi-squared =         0.9427 for     56 degrees of freedom 
# Null hypothesis probability =   5.971772e-01
 
Photon flux (15-150 keV)    in 1 sec: 3.71328 ( -0.47693  0.48784 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.62085e-07 ( -4.50407e-08  4.45362e-08 ) ergs/cm2

    Time-resolved spectra




    Distribution

    T90 vs. Hardness ratio plot 

    T90                                   = 67.384 sec.
Hardness ratio (energy fluence ratio) = 1.79002905524

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

    S(15-50 keV)  = 1.6611982e-06
S(50-150 keV) = 3.958859e-06

    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 = -1.032044984119505E+00, IMY = 4.954754069573491E-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:
-389.179400 -346.667400
-239.680000 -0.260000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
170.1151 -60.6945    3.1  30.1  -69.1   1.3945   3.8    7.3	Cen X-3                       
186.6569 -62.7754    0.4  22.0  -69.8   8.2644  25.8    0.3	GX 301-2                      
256.1796 -37.8048    5.7  25.8  105.9  -0.7265  -2.0    9.4	4U 1700-377                   
256.3917 -36.5685    5.2  27.0  104.7   0.8723   2.2    9.0	GX 349+2                      
263.0190 -24.7435  114.2  40.1  103.1   0.0944   0.1    0.6	GX 1+4                        
264.9561 -44.3652   56.2  25.1  127.6  -0.0643  -0.2   10.5	4U 1735-44                    
275.9975 -30.4305    4.3  41.3  122.8   2.5072   2.7    5.3	H1820-303                     
263.0451 -33.6948   60.5  32.3  110.8   0.0890   0.2    8.8	GX 354-0                      
210.6008 -21.3401    2.5  38.6   23.2   1.7728   4.7 ------	UNKNOWN                       
214.2049 -55.7542    2.7   8.9  -34.6   0.9730   4.3 ------	UNKNOWN                       
330.2403 -57.0141    2.2  49.3 -171.9   2.9368   5.4 ------	UNKNOWN                       
183.4576 -25.9253    2.7  45.4  -13.6   1.8649   4.3 ------	UNKNOWN                       
160.1124 -42.9210    3.2  44.9  -49.9   3.1376   3.6 ------	UNKNOWN

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

    Time interval of the image:
-0.260000 15.220620
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
170.1510 -60.4951    6.1  30.1  -68.8  -0.1422  -1.9    9.1	Cen X-3                       
186.7273 -62.7378    2.7  22.0  -69.7   0.2715   4.3    2.8	GX 301-2                      
256.0883 -38.0289    5.1  25.6  106.0   0.1534   2.2   12.1	4U 1700-377                   
256.3733 -36.3399  360.3  27.2  104.4   0.0023   0.0    5.8	GX 349+2                      
263.0475 -24.7807    9.9  40.1  103.2   0.2243   1.2    3.0	GX 1+4                        
264.5854 -44.2866    5.5  24.9  127.0  -0.1343  -2.1   11.9	4U 1735-44                    
275.8381 -30.2591    8.8  41.4  122.4   0.2397   1.3    7.9	H1820-303                     
263.1513 -33.8161   19.2  32.3  111.1   0.0562   0.6    8.2	GX 354-0                      
260.1869 -23.7230    2.6  39.8   98.8   0.8099   4.4 ------	UNKNOWN                       
248.8520 -25.4949    2.3  34.4   84.0   0.5085   5.1 ------	UNKNOWN                       
350.6075 -66.2317    0.4  48.9 -154.4   3.4431  26.9 ------	UNKNOWN

    Post-slew image of 15-350 keV band 

    Time interval of the image:
84.820670 962.367600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
170.2902 -60.6720    7.9  53.1   14.8   2.9635   1.5    3.0	Cen X-3                       
186.6431 -62.7741    1.0  50.4   24.4  21.2712  11.4    0.4	GX 301-2                      
203.1134 -64.5153    2.4  47.1   33.3   7.4560   4.8 ------	UNKNOWN                       
295.9377 -74.3354    2.9  19.2   57.0   1.5717   4.0 ------	UNKNOWN                       
332.2730 -15.8962    3.1  51.8  172.3   4.9695   3.7 ------	UNKNOWN