batgrbproduct Analysis for Trigger=154112

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Tue Jan  8 20:10:40 EST 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger154112/SDC
======================================================================

  Trigger: 00154112      Segment: 000

  BAT Trigger Time: 147850951.104   [s; MET]
      Trigger Stop: 147850953.152   [s; MET]
               UTC: 2005-09-08T05:42:31.386740    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 20.4636377922441   Dec: -12.9713413289566  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9.29
     Image Trigger?:     NO
     Rate S/N Ratio:     9.38083151964686  [ if not an image trigger ]
     Image S/N Ratio:    9.29

  Flight Position:   [ source = BAT ]
    RA: 20.4636377922441   Dec: -12.9713413289566  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 20.4620939181142   Dec: -12.9516122045307  [deg; J2000]  
        { 01h 21m 50.9s , -12d 57' 05.8" }
         +/- 1.50477497010232 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.569548360798703 [arcmin] (formal 1-sigma fit error)
    SNR: 16.9663171839676
    RA  =   1h 21m 50.9s  (20.462094 deg.)
    Dec = -12d 57'  6" (-12.951612 deg.)
 
  Angular difference between Flight and Ground position is 1.187185 arcmin
 
  Partial Coding Fraction: 0.734375    [ including projection effects ]

  Duration
     T90: 17.3719999790192 +/- 3.71168156757748
        Measured from: -3.83199998736382
                   to: 13.5399999916553     [s; relative to TRIGTIME]
     T50: 6.62799999117851 +/- 1.84988324280689
        Measured from: -0.203999996185303
                   to: 6.42399999499321     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 1.67599999904633     
                   to: 2.67599999904633     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -7.5     
                   to: 15.83599999547     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.290107   0.354890   0.182085   0.026176
           0.025831   0.026466   0.022914   0.019229 [error]
 Peak      0.019713   0.036282   0.023355   0.006094
           0.005497   0.005713   0.004932   0.003972 [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 9.62e-08 1.40e-07 1.52e-07 3.08e-07 4.83e-07 6.98e-07   erg/cm2
              Error 1.29e-08 1.27e-08 2.21e-08 9.01e-08 5.14e-08 1.13e-07   erg/cm2
Peak flux Power-law 2.27e-01 2.31e-01 1.65e-01 1.87e-01 6.97e-01 8.10e-01   ph/cm2/s
              Error 7.27e-02 4.73e-02 3.96e-02 9.03e-02 1.36e-01 1.59e-01   ph/cm2/s
 
Fluence   Cutoff-PL 8.95e-08 1.53e-07 1.49e-07 1.00e-07 4.52e-07 4.97e-07   erg/cm2
              Error 1.45e-08 1.77e-08 2.59e-08 1.28e-07 5.89e-08 1.42e-07   erg/cm2
Peak flux Cutoff-PL 1.85e-01 2.61e-01 1.80e-01 5.92e-02 6.70e-01 6.85e-01   ph/cm2/s
              Error 8.76e-02 6.24e-02 4.86e-02 1.14e-01 1.41e-01 1.73e-01   ph/cm2/s
 
Fluence        Band 8.85e-08 1.54e-07 1.43e-07 2.21e-07 4.64e-07 5.93e-07   erg/cm2
              Error 1.39e-08 1.90e-08 2.20e-08 1.15e-07 5.24e-08 1.53e-07   erg/cm2
Peak flux      Band 1.85e-01 2.61e-01 1.80e-01 5.93e-02 6.70e-01 6.85e-01   ph/cm2/s
              Error 8.61e-02 5.96e-02 4.11e-02 1.09e-01 1.40e-01 1.56e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.881    0.166    -      -           2.25e-03 2.40e-04   55.142 57
CPL   1.155    0.750      49.9   59.7      5.82e-03 8.38e-03   51.955 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.487    0.319    -      -           5.60e-03 1.10e-03   58.508 57
CPL   0.233    1.764      69.0 4974.0      2.47e-02 1.44e-01   56.330  0
 
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: 7.552000 sec.
T50 in the 50-300 keV band: 3.712000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   23.336   -7.500   15.836
T90    17.372   -3.832   13.540
T50     6.628   -0.204    6.424
Peak    1.000    1.676    2.676

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
   20.4621 -12.9516 0.0114   27.8   20.8       0.8815    17.0  TRIG_00154112       
------------------------------------------
 
Foreground time interval of the image:
 -7.500  15.836 (delta_t =  23.336 [sec])
Background time interval of the image:
-299.104  -7.500 (delta_t = 291.604 [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

8 ms binning

From T100_start-3 s to T100_start+3 s

2 ms binning

From T100_start-1 s to T100_start+1 s

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

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

Spectra

Notes:

Time averaged spectrum fit using the pre-slew DRM

Power-law model
Time interval is from   -7.500 sec. to   15.836 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.88130     ( -0.162778   0.168463 )
Norm@50keV  : 2.251494E-03    ( -2.420554E-04   2.381064E-04) )
------------------------------------------------------------
 Chi-Squared =      55.14179     using    59 PHA bins.
 Reduced chi-squared =     0.9673998     for     57 degrees of freedom
 Null hypothesis probability = 0.545
 
Photon flux (15-150 keV)    in 23.34 sec: 0.320581 ( -0.029318  0.029338 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.8308e-07 ( -5.10352e-08  5.18451e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -7.500 sec. to   15.836 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.15544     ( -0.804209   0.696435 )
Epeak [keV] : 49.8606      ( -11.5951 107.859 )
Norm@50keV  : 5.817044E-03    ( -5.817045E-03   1.094211E-02) )
------------------------------------------------------------
 Chi-Squared =      51.95476     using    59 PHA bins.
 Reduced chi-squared =     0.9277635     for     56 degrees of freedom
 Null hypothesis probability = 0.629
 
Photon flux (15-150 keV)    in 23.34 sec: 0.312508 ( -0.030369  0.030315 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.51655e-07 ( -5.80279e-08  5.96991e-08 ) ergs/cm2
 
Band function
Time interval is from   -7.500 sec. to   15.836 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.14887   ( -2.56020   2.30470 )
beta        : -2.71565    ( -0.351653   0.318143 )
Epeak [keV] : 49.0855      ( -9.07127 29.8326 )
Norm@50keV   : 5.917145E-03    ( -0.260264   93.8142 )
------------------------------------------------------------
 Chi-Squared =      51.87090     using    59 PHA bins.
 Reduced chi-squared =     0.9431073     for     55 degrees of freedom
 Null hypothesis probability = 0.595
 
Photon flux (15-150 keV)    in 23.34 sec: 0.314316 ( -0.029011  0.030372 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.63574e-07 ( -5.25547e-08  5.23073e-08 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    1.676 sec. to    2.676 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.48657     ( -0.316703   0.320926 )
Norm@50keV  : 5.599443E-03    ( -1.107114E-03   1.097240E-03) )
------------------------------------------------------------
 Chi-Squared =      58.50774     using    59 PHA bins.
 Reduced chi-squared =      1.026452     for     57 degrees of freedom
 Null hypothesis probability = 0.420
 
Photon flux (15-150 keV)    in 1.000 sec: 0.696532 ( -0.136243  0.136575 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.32438e-08 ( -1.13228e-08  1.14935e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    1.676 sec. to    2.676 sec.
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.232625     ( -2.13666   1.39225 )
Epeak [keV] : 68.9879      ( -17.0567 9931.01 )
Norm@50keV  : 2.472693E-02    ( -1.960434E-02   0.268737 )
------------------------------------------------------------
 Chi-Squared =      56.33022     using    59 PHA bins.
 but latest trial   43.7798     gives Chi-Squared =   5.41787
 Reduced chi-squared =      1.005897     for     56 degrees of freedom
 Null hypothesis probability = 0.462
 
Photon flux (15-150 keV)    in 1.000 sec: 0.669816 ( -0.141683  0.141061 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.91967e-08 ( -1.19926e-08  1.26068e-08 ) ergs/cm2
 
Band function
Time interval is from    1.676 sec. to    2.676 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.233556   ( -1.39105   1.36414 )
beta        : -9.26146    ( -7.53447   1.11956 )
Epeak [keV] : 68.9865      ( -65.2651 9934.63 )
Norm@50keV   : 2.470416E-02    ( -2.873067E-02   51.7478 )
------------------------------------------------------------
 Chi-Squared =      56.33022     using    59 PHA bins.
 Reduced chi-squared =      1.024186     for     55 degrees of freedom
 Null hypothesis probability = 0.425
 
Photon flux (15-150 keV)    in 1.000 sec: 0.669919 ( -0.138711  0.140963 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.92002e-08 ( -1.19829e-08  1.25605e-08 ) ergs/cm2
 
Plot creation:
Tue Jan  8 20:22:58 EST 2008