batgrbproduct Analysis for Trigger=177408

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Mon Dec 31 09:25:20 EST 2007
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger177408/SDC
======================================================================

  Trigger: 00177408      Segment: 000

  BAT Trigger Time: 159023281.6   [s; MET]
      Trigger Stop: 159023289.792   [s; MET]
               UTC: 2006-01-15T13:08:00.643040    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 54.0444635355556   Dec: 17.3440437273643  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    10.48
     Image Trigger?:     NO
     Rate S/N Ratio:     13.856406460551  [ if not an image trigger ]
     Image S/N Ratio:    10.48

  Flight Position:   [ source = BAT ]
    RA: 54.0444635355556   Dec: 17.3440437273643  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 54.0102124140686   Dec: 17.3299685478132  [deg; J2000]  
        { 03h 36m 02.5s , +17d 19' 47.9" }
         +/- 2.10139834124493 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.20163790561823 [arcmin] (formal 1-sigma fit error)
    SNR: 10.5291209744617
    RA  =   3h 36m  2.5s  (54.010212 deg.)
    Dec =  17d 19' 48" (17.329969 deg.)
 
  Angular difference between Flight and Ground position is 2.135761 arcmin
 
  Partial Coding Fraction: 0.859375    [ including projection effects ]

  Duration
     T90: 125.043999999762 +/- 15.0870791029542
        Measured from: -21.7479999959469
                   to: 103.296000003815     [s; relative to TRIGTIME]
     T50: 92.391999989748 +/- 2.68196046683047
        Measured from: 2.94800001382828
                   to: 95.3400000035763     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 94.9160000085831     
                   to: 95.9160000085831     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -49.2119999825954     
                   to: 108.043999999762     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.993470   1.283012   0.748379   0.090389
           0.064090   0.065238   0.057355   0.050664 [error]
 Peak      0.030892   0.039749   0.032913   0.012700
           0.005011   0.005270   0.004710   0.004067 [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 3.27e-07 5.16e-07 6.12e-07 1.41e-06 1.87e-06 2.87e-06   erg/cm2
              Error 3.35e-08 3.27e-08 5.72e-08 2.77e-07 1.33e-07 3.26e-07   erg/cm2
Peak flux Power-law 2.64e-01 2.94e-01 2.34e-01 3.08e-01 9.07e-01 1.10e+00   ph/cm2/s
              Error 6.77e-02 4.49e-02 3.97e-02 1.13e-01 1.25e-01 1.57e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.95e-07 5.56e-07 6.19e-07 5.04e-07 1.75e-06 1.97e-06   erg/cm2
              Error 3.98e-08 4.26e-08 6.41e-08 3.53e-07 1.53e-07 3.83e-07   erg/cm2
Peak flux Cutoff-PL 2.64e-01 2.94e-01 2.34e-01 3.06e-01 9.07e-01 1.10e+00   ph/cm2/s
              Error 6.77e-02 4.49e-02 3.97e-02 1.12e-01 1.25e-01 1.56e-01   ph/cm2/s
 
Fluence        Band 2.92e-07 5.53e-07 6.18e-07 5.03e-07 1.75e-06 2.04e-06   erg/cm2
              Error 3.94e-08 4.24e-08 6.40e-08 3.52e-07 1.53e-07 4.52e-07   erg/cm2
Peak flux      Band 2.64e-01 2.94e-01 2.34e-01 3.06e-01 9.07e-01 1.10e+00   ph/cm2/s
              Error 6.77e-02 5.61e-02 4.05e-02 1.15e-01 1.25e-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    1.752    0.116    -      -           1.29e-03 8.81e-05   52.504 57
CPL   1.026    0.524      62.4   23.1      3.12e-03 2.19e-03   45.764 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.330    0.251    -      -           7.56e-03 1.03e-03   48.813 57
CPL   1.279    1.178     669.6    0.0      8.02e-03 1.04e-03   48.912 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: 104.576000 sec.
T50 in the 50-300 keV band: 52.416000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  157.256  -49.212  108.044
T90   125.044  -21.748  103.296
T50    92.392    2.948   95.340
Peak    1.000   94.916   95.916

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
   54.0102 +17.3300 0.0183   20.5 -130.9       1.4102    10.5  TRIG_00177408       
------------------------------------------
 
Foreground time interval of the image:
-49.212  56.205 (delta_t = 105.417 [sec])
Background time interval of the image:
-172.995 -49.212 (delta_t = 123.783 [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  -49.212 sec. to  108.044 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.75215     ( -0.115439   0.117369 )
Norm@50keV  : 1.285187E-03    ( -8.844386E-05   8.767680E-05) )
------------------------------------------------------------
 Chi-Squared =      52.50373     using    59 PHA bins.
 Reduced chi-squared =     0.9211181     for     57 degrees of freedom
 Null hypothesis probability = 0.644
 
Photon flux (15-150 keV)    in 157.3 sec: 0.173916 ( -0.011149  0.011167 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.86526e-06 ( -1.32698e-07  1.33721e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  -49.212 sec. to  108.044 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.02610     ( -0.558011   0.490898 )
Epeak [keV] : 62.4163      ( -10.9372 35.1676 )
Norm@50keV  : 3.117303E-03    ( -1.381535E-03   2.989009E-03) )
------------------------------------------------------------
 Chi-Squared =      45.76443     using    59 PHA bins.
 Reduced chi-squared =     0.8172220     for     56 degrees of freedom
 Null hypothesis probability = 0.834
 
Photon flux (15-150 keV)    in 157.3 sec: 0.167586 ( -0.011917  0.011899 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.75001e-06 ( -1.51716e-07  1.53871e-07 ) ergs/cm2
 
Band function
Time interval is from  -49.212 sec. to  108.044 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.12528   ( -0.400884   0.483459 )
beta        : -7.32329    ( -2.67671   5.46567 )
Epeak [keV] : 64.9522      ( -13.6145 34.5013 )
Norm@50keV   : 2.766021E-03    ( -1.048360E-03   2.772547E-03) )
------------------------------------------------------------
 Chi-Squared =      45.86752     using    59 PHA bins.
 Reduced chi-squared =     0.8339548     for     55 degrees of freedom
 Null hypothesis probability = 0.805
 
Photon flux (15-150 keV)    in 157.3 sec: 0.167589 ( -0.01192  0.011903 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.74839e-06 ( -1.5159e-07  1.5343e-07 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from   94.916 sec. to   95.916 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.33009     ( -0.252373   0.250555 )
Norm@50keV  : 7.557639E-03    ( -1.032718E-03   1.028369E-03) )
------------------------------------------------------------
 Chi-Squared =      48.81327     using    59 PHA bins.
 Reduced chi-squared =     0.8563732     for     57 degrees of freedom
 Null hypothesis probability = 0.771
 
Photon flux (15-150 keV)    in 1.000 sec: 0.906832 ( -0.12517  0.125418 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.41424e-08 ( -1.14365e-08  1.1596e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   94.916 sec. to   95.916 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.27925     ( -0.710186   1.64553 )
Epeak [keV] : 669.610      (   )
Norm@50keV  : 8.019053E-03    ( -1.038389E-03   1.034298E-03) )
------------------------------------------------------------
 Chi-Squared =      48.91228     using    59 PHA bins.
 Reduced chi-squared =     0.8734336     for     56 degrees of freedom
 Null hypothesis probability = 0.738
 
Photon flux (15-150 keV)    in 1.000 sec: 0.906551 ( -0.125008  0.125379 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.41627e-08 ( -1.14501e-08  1.15934e-08 ) ergs/cm2
 
Band function
Time interval is from   94.916 sec. to   95.916 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.02155   ( -8.97845   5.93429 )
beta        : -1.32882    ( -8.67118   0.251424 )
Epeak [keV] : 53.3409      ( -53.2409 9943.10 )
Norm@50keV   : 1.438865E-02    ( -1.438865E-02   303.441 )
------------------------------------------------------------
 Chi-Squared =      48.81417     using    59 PHA bins.
 Reduced chi-squared =     0.8875304     for     55 degrees of freedom
 Null hypothesis probability = 0.709
 
Photon flux (15-150 keV)    in 1.000 sec: 0.906551 ( -0.125008  0.125379 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.40923e-08 ( -1.1507e-08  1.15962e-08 ) ergs/cm2
 
Plot creation:
Mon Dec 31 09:36:47 EST 2007