batgrbproduct Analysis for Trigger=381434

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.45
    Process Start Time (local time): Tue Dec 29 09:35:45 EST 2009
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger381434/GCN5_download_cron
======================================================================

  Trigger: 00381434      Segment: 000

  BAT Trigger Time: 283745229.416   [s; MET]
      Trigger Stop: 283745229.48   [s; MET]
               UTC: 2009-12-29T02:07:04.026500    [includes UTCF correction] 
       Where From?: (*SHORT BURST*) TDRSS scaled map message

  BAT 
    RA: 74.8157170298384   Dec: -55.0421834227911  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    6.56
     Image Trigger?:     NO
     Rate S/N Ratio:     8.12403840463596  [ if not an image trigger ]
     Image S/N Ratio:    6.56

  Flight Position:   [ source = BAT ]
    RA: 74.8157170298384   Dec: -55.0421834227911  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 74.7542399661944   Dec: -54.9952534603265  [deg; J2000]  
        { 04h 59m 01.0s , -54d 59' 42.9" }
         +/- 3.2819975369978 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.75046780853913 [arcmin] (formal 1-sigma fit error)
    SNR: 5.5690103074071
 
  Angular difference between Flight and Ground position is 3.521471 arcmin
 
  Partial Coding Fraction: 1    [ including projection effects ]

  Duration
     T90: 0.0640000104904175 +/- 
        Measured from: 0
                   to: 0.0640000104904175     [s; relative to TRIGTIME]
     T50: 0.0640000104904175 +/- 
        Measured from: 0
                   to: 0.0640000104904175     [s; relative to TRIGTIME]

    WARNING: battblocks failed.  Used TDRSS fore/background intervals

  Fluence
     Peak Flux  (peak 0.0640000104904175 second)
        Measured from: 0     
                   to: 0.0640000104904175     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0     
                   to: 0.0640000104904175     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.003176   0.001632   0.005482   0.004656
           0.001265   0.001441   0.001369   0.001366 [error]
 Peak      0.003176   0.001632   0.005482   0.004656
           0.001265   0.001441   0.001369   0.001366 [error]

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

======================================================================
 
=== 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   Power-law 4.60e-10 1.01e-09 1.74e-09 6.95e-09 4.76e-09 1.01e-08   erg/cm2
              Error 4.68e-10 7.82e-10 1.39e-09 1.72e-08 3.76e-09 1.70e-08   erg/cm2
Peak flux Power-law 2.38e-01 2.79e-01 2.37e-01 3.41e-01 8.76e-01 1.09e+00   ph/cm2/s
              Error 2.40e-01 2.18e-01 1.87e-01 6.76e-01 4.41e-01 6.43e-01   ph/cm2/s
 
Fluence   Cutoff-PL 4.59e-10 1.01e-09 1.74e-09 6.89e-09 4.76e-09 1.01e-08   erg/cm2
              Error 4.69e-10 7.83e-10 1.39e-09 1.71e-08 3.76e-09 1.70e-08   erg/cm2
Peak flux Cutoff-PL 2.37e-01 2.79e-01 2.37e-01 3.38e-01 8.75e-01 1.09e+00   ph/cm2/s
              Error 2.40e-01 2.18e-01 1.87e-01 6.72e-01 4.40e-01 6.40e-01   ph/cm2/s
 
Fluence        Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   erg/cm2
              Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   erg/cm2
Peak flux      Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   ph/cm2/s
              Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.214    1.354    -      -           7.35e-03 3.59e-03   64.900 57
CPL   2.470    0.000     155.0    0.0      1.88e-03 0.00e+00   64.660 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.238    1.319    -      -           7.42e-03 3.75e-03   65.460 57
CPL   2.486    0.000     159.9    0.0      1.91e-03 0.00e+00   65.200 56
 
Model      : spectral model: simple power-law (PL) and cutoff power-law (CPL)
Ph_index   : photon index: E^-{Ph_index} (minus sign is not included in the 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 PL model and at 1 keV in CPL model
Nomr_90err : 90% error of the normalization
chi2       : Chi-Squared
dof        : degree of freedom
 
=== T90/T50 calculation in the 50-300 keV band (BATSE band) using 64 ms lc ===
 
T90 in the 50-300 keV band: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    0.064    0.000    0.064
T90     0.064    0.000    0.064
T50     0.064    0.000    0.064
Peak    0.064    0.000    0.064
  • Click here for the BAT GCN circular template

    Image

    Pre-slew 15-350 keV image (Event data; bkg subtracted)

    #   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
       74.7542 -54.9953 0.0344   12.5 -133.9       0.0145     5.6  TRIG_00381434       
    ------------------------------------------
     
    Foreground time interval of the image:
      0.000   0.064 (delta_t =   0.064 [sec])
    Background time interval of the image:
    -60.416  -5.416 (delta_t =  55.000 [sec])
    

    Lightcurves

    Notes:

    1 s binning

    From T0-310 s to T0+310 s
    From T100_start - 20 s to T100_end + 30 s
    Full time interval

    64 ms binning

    Full time interval
    From T100_start to T100_end
    From T0-5 sec to T0+5 sec

    16 ms binning

    From T100_start-5 s to T100_start+5 s
    Blue+Cyan dotted lines: Time interval of the scaled map
    From 0.000000 to 0.064000
    

    8 ms binning

    From T100_start-3 s to T100_start+3 s
    Blue+Cyan dotted lines: Time interval of the scaled map
    From 0.000000 to 0.064000
    

    2 ms binning

    From T100_start-1 s to T100_start+1 s
    Blue+Cyan dotted lines: Time interval of the scaled map
    From 0.000000 to 0.064000
    

    SN=5 or 10 sec. binning (whichever binning is satisfied first)

    SN=5 or 10 sec. binning (T < 200 sec)

    Flight mask-tagged light curves

    Caution: Mask-weight map is always using the same on-axis map

    Quad-rate summed light curves (from T0-300 to T0+1000)

    Spectra

    Notes:

    Time averaged spectrum fit using the pre-slew DRM

    Power-law model
    Time interval is from    0.000 sec. to    0.064 sec.
     
    Spectral model in power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 1.21421     ( -1.51262   1.19628 )
    Norm@50keV  : 7.35405E-03    ( -0.00359414   0.00359353 )
    ------------------------------------------------------------
    # Chi-Squared =          64.90 using 59 PHA bins.
    # Reduced chi-squared =          1.139 for     57 degrees of freedom 
    # Null hypothesis probability =   2.205216e-01
     
    Photon flux (15-150 keV)    in 0.064 sec: 0.864797 ( -0.864812  0.439901 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 4.75804e-09 ( -4.75804e-09  2.75414e-09 ) ergs/cm2
     
    
    Cutoff power-law model
    Time interval is from    0.000 sec. to    0.064 sec.
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 2.46956     (     )
    Epeak [keV] : 154.955      (   )
    Norm@50keV  : 1.88304E-03    (     )
    ------------------------------------------------------------
    # Chi-Squared =          64.66 using 59 PHA bins.
    # Reduced chi-squared =          1.155 for     56 degrees of freedom 
    # Null hypothesis probability =   2.000546e-01
     
    Photon flux (15-150 keV)    in 0.064 sec: 0.864339 ( -0.864339  0.439801 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 4.7571e-09 ( -4.7571e-09  2.75618e-09 ) ergs/cm2
     
    
    Band function
    Time interval is from    0.000 sec. to    0.064 sec.
     
    Spectral model in the Band function:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    alpha       : -0.986906   ( 0.987095   0.987095 )
    beta        : -1.21307    ( 1.2128   1.51208 )
    Epeak [keV] : 47.2155      ( -46.7293 -46.7293 )
    Norm@50keV   : 1.31120E-02    ( -0.0131235   12432.8 )
    ------------------------------------------------------------
    # Chi-Squared =          64.90 using 59 PHA bins.
    # Reduced chi-squared =          1.180 for     55 degrees of freedom 
    # Null hypothesis probability =   1.696149e-01
     
    Photon flux (15-150 keV)    in 0.064 sec:  (    ) ph/cm2/s
    Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
     
    

    Peak spectrum fit

    Power-law model
    Time interval is from    0.000 sec. to    0.064 sec.
     
    Spectral model in power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 1.23848     ( -1.4554   1.18229 )
    Norm@50keV  : 7.41772E-03    ( -0.00391826   0.00358653 )
    ------------------------------------------------------------
    # Chi-Squared =          65.46 using 59 PHA bins.
    # Reduced chi-squared =          1.148 for     57 degrees of freedom 
    # Null hypothesis probability =   2.065871e-01
     
    Photon flux (15-150 keV)    in 0.064 sec: 0.875520 ( -0.442543  0.438581 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 4.76751e-09 ( -4.76745e-09  2.7516e-09 ) ergs/cm2
     
    
    Cutoff power-law model
    Time interval is from    0.000 sec. to    0.064 sec.
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 2.48614     (     )
    Epeak [keV] : 159.912      (   )
    Norm@50keV  : 1.90828E-03    (     )
    ------------------------------------------------------------
    # Chi-Squared =          65.20 using 59 PHA bins.
    # Reduced chi-squared =          1.164 for     56 degrees of freedom 
    # Null hypothesis probability =   1.873416e-01
     
    Photon flux (15-150 keV)    in 0.064 sec: 0.875078 ( -0.44246  0.438452 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 4.76637e-09 ( -4.76637e-09  2.75363e-09 ) ergs/cm2
     
    
    Band function
    Time interval is from    0.000 sec. to    0.064 sec.
     
    Spectral model in the Band function:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    alpha       : -1.01283   ( 1.01293   1.01293 )
    beta        : -1.23683    ( 1.23717   1.45486 )
    Epeak [keV] : 40.8275      ( -40.8525 -40.8525 )
    Norm@50keV   : 1.35385E-02    ( -0.0135419   0.477236 )
    ------------------------------------------------------------
    # Chi-Squared =          65.46 using 59 PHA bins.
    # Reduced chi-squared =          1.190 for     55 degrees of freedom 
    # Null hypothesis probability =   1.578571e-01
     
    Photon flux (15-150 keV)    in 0.064 sec:  (    ) ph/cm2/s
    Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
     
    

    Pre-slew spectrum (Pre-slew PHA with pre-slew DRM)

    Power-law model
     
    Spectral model in power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 1.21421     ( -1.51262   1.19628 )
    Norm@50keV  : 7.35405E-03    ( -0.00359414   0.00359353 )
    ------------------------------------------------------------
    # Chi-Squared =          64.90 using 59 PHA bins.
    # Reduced chi-squared =          1.139 for     57 degrees of freedom 
    # Null hypothesis probability =   2.205216e-01
     
    Photon flux (15-150 keV)    in 0.064 sec: 0.864797 ( -0.864812  0.439901 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 4.75804e-09 ( -4.75804e-09  2.75414e-09 ) ergs/cm2
     
    
    Cutoff power-law model
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 2.46956     (     )
    Epeak [keV] : 154.955      (   )
    Norm@50keV  : 1.88304E-03    (     )
    ------------------------------------------------------------
    # Chi-Squared =          64.66 using 59 PHA bins.
    # Reduced chi-squared =          1.155 for     56 degrees of freedom 
    # Null hypothesis probability =   2.000546e-01
     
    Photon flux (15-150 keV)    in 0.064 sec: 0.864339 ( -0.864339  0.439801 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 4.7571e-09 ( -4.7571e-09  2.75618e-09 ) ergs/cm2
     
    
    Band function
     
    Spectral model in the Band function:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    alpha       : -0.986906   ( 0.987095   0.987095 )
    beta        : -1.21307    ( 1.2128   1.51208 )
    Epeak [keV] : 47.2155      ( -46.7293 -46.7293 )
    Norm@50keV   : 1.31120E-02    ( -0.0131235   12432.8 )
    ------------------------------------------------------------
    # Chi-Squared =          64.90 using 59 PHA bins.
    # Reduced chi-squared =          1.180 for     55 degrees of freedom 
    # Null hypothesis probability =   1.696149e-01
     
    Photon flux (15-150 keV)    in 0.064 sec:  (    ) ph/cm2/s
    Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
     
    

    S(25-50 keV) vs. S(50-100 keV) plot

    S(25-50 keV)  = 1.00702e-09
    S(50-100 keV) = 1.73793e-09
    

    T90 vs. Hardness ratio plot

    T90                                   = 0.0640000104904175 sec.
    Hardness ratio (energy fluence ratio) = 1.72581
    

    Color vs. Color plot

    Count Ratio  (25-50 keV) / (15-25 keV) = 0.513854
    Count Ratio (50-100 keV) / (15-25 keV) = 1.72607
    

    Mask shadow pattern

    IMX = 0, IMY = 0
    

    TIME vs. PHA plot around the trigger time

    Blue+Cyan dotted lines: Time interval of the scaled map
    From 0.000000 to 0.064000
    

    TIME vs. DetID plot around the trigger time

    Blue+Cyan dotted lines: Time interval of the scaled map
    From 0.000000 to 0.064000
    

    100 us light curve (15-350 keV)

    Blue+Cyan dotted lines: Time interval of the scaled map
    From 0.000000 to 0.064000
    

    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:
    -60.416000 -5.416000
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
    135.5143 -40.6664    3.8  49.3  177.7   0.5456   3.0    6.7	Vela X-1                      
    160.8036 -52.5541    3.1  58.7 -159.2   1.7179   3.8 ------	UNKNOWN                       
    163.4017 -54.6262    2.1  58.9 -156.2   2.7037   5.5 ------	UNKNOWN                       
    

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

    Time interval of the image:
    0.000000 0.064000
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
    135.7168 -40.5940   13.9  49.4  177.7  -0.0051  -0.8    8.9	Vela X-1                      
     74.7535 -54.9963    2.1  12.5 -133.9   0.0145   5.6 ------	UNKNOWN                       
    

    Post-slew image of 15-350 keV band

    Time interval of the image:
    43.784600 302.686400
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
    135.4945 -40.4480   12.9  41.8  164.3   0.3155   0.9    6.6	Vela X-1                      
    170.3351 -60.5559   14.2  46.7 -153.7  -0.3538  -0.8    4.1	Cen X-3                       
    186.6283 -62.7582    3.9  50.9 -144.6   2.0705   3.0    1.1	GX 301-2                      
     36.4312 -30.5215    2.8  36.6    4.7   1.0827   4.1 ------	UNKNOWN                       
     57.3180 -59.3434    3.3  10.4  -53.1   0.6029   3.5 ------	UNKNOWN                       
    165.5873 -41.8585    4.0  57.3 -173.7   2.4114   2.9 ------	UNKNOWN                       
     24.6075 -38.2748    2.0  37.3  -16.1   1.4177   5.7 ------	UNKNOWN                       
      9.7438 -40.6159    2.8  44.2  -30.6   1.4479   4.2 ------	UNKNOWN                       
    181.7494 -50.9414    4.1  57.9 -156.8   3.4391   2.9 ------	UNKNOWN                       
    325.2212 -76.8572    3.0  41.0  -92.4   3.4485   3.8 ------	UNKNOWN                       
    
    Plot creation:
    Mon Feb 15 14:53:37 EST 2010