batgrbproduct Analysis for Trigger=177666

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Mon Dec 31 09:48:52 EST 2007
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger177666/SDC
======================================================================

  Trigger: 00177666      Segment: 000

  BAT Trigger Time: 159173402.56   [s; MET]
      Trigger Stop: 159173403.584   [s; MET]
               UTC: 2006-01-17T06:50:01.599700    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 327.926469426567   Dec: -59.9805138823269  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    24.66
     Image Trigger?:     NO
     Rate S/N Ratio:     217.575274330518  [ if not an image trigger ]
     Image S/N Ratio:    24.66

  Flight Position:   [ source = BAT ]
    RA: 327.926469426567   Dec: -59.9805138823269  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 327.912050780618   Dec: -59.9815566379465  [deg; J2000]  
        { 21h 51m 38.9s , -59d 58' 53.6" }
         +/- 0.632491494587299 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.195432614217544 [arcmin] (formal 1-sigma fit error)
    SNR: 58.5229171684095
    RA  =  21h 51m 38.9s  (327.912051 deg.)
    Dec = -59d 58' 54" (-59.981557 deg.)
 
  Angular difference between Flight and Ground position is 0.437306 arcmin
 
  Partial Coding Fraction: 0.2539062    [ including projection effects ]

  Duration
     T90: 16.8640000224113 +/- 0.150359566921606
        Measured from: 0.111999988555908
                   to: 16.9760000109673     [s; relative to TRIGTIME]
     T50: 9.98800000548363 +/- 0.353836112308116
        Measured from: 3.13199999928474
                   to: 13.1200000047684     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 11.1200000047684     
                   to: 12.1200000047684     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -2.15999999642372     
                   to: 26.9799999892712     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     9.216200  12.208586   7.954910   1.735237
           0.091904   0.100974   0.086864   0.058860 [error]
 Peak      1.240309   1.969112   1.659329   0.375363
           0.028798   0.035797   0.033826   0.019301 [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 4.32e-06 6.12e-06 6.43e-06 1.25e-05 2.08e-05 2.97e-05   erg/cm2
              Error 1.53e-07 1.27e-07 1.12e-07 5.05e-07 3.35e-07 0.00e+00   erg/cm2
Peak flux Power-law 1.82e+01 1.71e+01 1.12e+01 1.13e+01 5.11e+01 5.78e+01   ph/cm2/s
              Error 8.87e-01 5.10e-01 2.93e-01 6.18e-01 1.46e+00 1.43e+00   ph/cm2/s
 
Fluence   Cutoff-PL 3.72e-06 6.14e-06 6.73e-06 8.36e-06 2.02e-05 2.40e-05   erg/cm2
              Error 2.19e-07 1.31e-07 1.43e-07 9.91e-07 3.71e-07 0.00e+00   erg/cm2
Peak flux Cutoff-PL 1.45e+01 1.74e+01 1.23e+01 6.99e+00 4.83e+01 5.11e+01   ph/cm2/s
              Error 1.17e+00 5.46e-01 4.06e-01 8.46e-01 1.56e+00 1.89e+00   ph/cm2/s
 
Fluence        Band 3.71e-06 6.12e-06 6.71e-06 8.37e-06 2.02e-05 2.46e-05   erg/cm2
              Error 2.13e-07 1.31e-07 1.43e-07 9.90e-07 3.70e-07 0.00e+00   erg/cm2
Peak flux      Band 1.45e+01 1.74e+01 1.23e+01 6.99e+00 4.83e+01 5.11e+01   ph/cm2/s
              Error 1.17e+00 5.46e-01 4.06e-01 8.46e-01 1.56e+00 1.89e+00   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.928    0.030    -      -           7.75e-02 1.24e-03   66.997 57
CPL   1.495    0.137      70.4    6.1      1.17e-01 1.50e-02   35.575 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.614    0.042    -      -           3.96e-01 9.49e-03   99.611 57
CPL   0.879    0.194      92.2   10.1      8.08e-01 1.50e-01   51.669 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: 16.064000 sec.
T50 in the 50-300 keV band: 10.304000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   29.140   -2.160   26.980
T90    16.864    0.112   16.976
T50     9.988    3.132   13.120
Peak    1.000   11.120   12.120

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  327.9121 -59.9816 0.0033   50.1 -159.0      32.8617    58.5  TRIG_00177666       
------------------------------------------
 
Foreground time interval of the image:
 -2.160  26.980 (delta_t =  29.140 [sec])
Background time interval of the image:
-299.560  -2.160 (delta_t = 297.400 [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   -2.160 sec. to   26.980 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.92765     ( -3.047240E-02   3.031313E-02) )
Norm@50keV  : 7.750490E-02    ( -1.242004E-03   1.239978E-03) )
------------------------------------------------------------
 Chi-Squared =      66.99670     using    59 PHA bins.
 Reduced chi-squared =      1.175381     for     57 degrees of freedom
 Null hypothesis probability = 0.172
 
Photon flux (15-150 keV)    in 29.14 sec: 11.2552 ( -0.2541  0.256 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.07725e-05 ( -3.3546e-07  3.35372e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -2.160 sec. to   26.980 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.49459     ( -0.139194   0.135171 )
Epeak [keV] : 70.4266      ( -5.05356 7.10926 )
Norm@50keV  : 0.117035    ( -1.384804E-02   1.619960E-02) )
------------------------------------------------------------
 Chi-Squared =      35.57463     using    59 PHA bins.
 Reduced chi-squared =     0.6352612     for     56 degrees of freedom
 Null hypothesis probability = 0.985
 
Photon flux (15-150 keV)    in 29.14 sec: 10.6415 ( -0.3008  0.305 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.02287e-05 ( -3.70865e-07  3.70253e-07 ) ergs/cm2
 
Band function
Time interval is from   -2.160 sec. to   26.980 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.49449   ( -0.135237   0.139130 )
beta        : -9.34673    ( -0.653268   7.25489 )
Epeak [keV] : 70.4049      ( -5.04575 7.11169 )
Norm@50keV   : 0.117032    ( -1.386220E-02   1.619025E-02) )
------------------------------------------------------------
 Chi-Squared =      35.57512     using    59 PHA bins.
 Reduced chi-squared =     0.6468204     for     55 degrees of freedom
 Null hypothesis probability = 0.981
 
Photon flux (15-150 keV)    in 29.14 sec: 10.6415 ( -0.3008  0.3054 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.0205e-05 ( -3.69524e-07  3.70777e-07 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from   11.120 sec. to   12.120 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.61351     ( -4.162037E-02   4.169643E-02) )
Norm@50keV  : 0.396021    ( -9.488732E-03   9.487122E-03) )
------------------------------------------------------------
 Chi-Squared =      99.61118     using    59 PHA bins.
 Reduced chi-squared =      1.747565     for     57 degrees of freedom
 Null hypothesis probability = 4.122E-04
 
Photon flux (15-150 keV)    in 1.000 sec: 51.1056 ( -1.4531  1.4602 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.6977e-06 ( -8.8494e-08  8.8511e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   11.120 sec. to   12.120 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.879119     ( -0.198494   0.190437 )
Epeak [keV] : 92.2482      ( -8.00365 12.1751 )
Norm@50keV  : 0.807972    ( -0.133421   0.166703 )
------------------------------------------------------------
 Chi-Squared =      51.66913     using    59 PHA bins.
 Reduced chi-squared =     0.9226630     for     56 degrees of freedom
 Null hypothesis probability = 0.639
 
Photon flux (15-150 keV)    in 1.000 sec: 48.2820 ( -1.5539  1.5704 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.62586e-06 ( -9.1785e-08  9.1482e-08 ) ergs/cm2
 
Band function
Time interval is from   11.120 sec. to   12.120 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.879665   ( -0.189832   0.199122 )
beta        : -9.12238    ( -0.877616   6.87389 )
Epeak [keV] : 92.2689      ( -8.04086 12.1299 )
Norm@50keV   : 0.807432    ( -0.132908   0.167307 )
------------------------------------------------------------
 Chi-Squared =      51.67010     using    59 PHA bins.
 Reduced chi-squared =     0.9394563     for     55 degrees of freedom
 Null hypothesis probability = 0.603
 
Photon flux (15-150 keV)    in 1.000 sec: 48.2849 ( -1.5572  1.5673 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.62333e-06 ( -9.1824e-08  9.1265e-08 ) ergs/cm2
 
Plot creation:
Mon Dec 31 09:56:22 EST 2007