batgrbproduct Analysis for Trigger=180455

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Mon Dec 31 11:31:58 EST 2007
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger180455/GCN5_download_hand
======================================================================

  Trigger: 00180455      Segment: 000

  BAT Trigger Time: 160894014.272   [s; MET]
      Trigger Stop: 160894014.784   [s; MET]
               UTC: 2006-02-06T04:46:53.272980    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 202.945915510309   Dec: 35.0746795454092  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    10.17
     Image Trigger?:     NO
     Rate S/N Ratio:     21.6101827849743  [ if not an image trigger ]
     Image S/N Ratio:    10.17

  Flight Position:   [ source = BAT ]
    RA: 202.945915510309   Dec: 35.0746795454092  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 202.928675282273   Dec: 35.0499097710462  [deg; J2000]  
        { 13h 31m 42.9s , +35d 02' 59.7" }
         +/- 0.736870705284255 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.283688458657554 [arcmin] (formal 1-sigma fit error)
    SNR: 47.0499745123531
    RA  =  13h 31m 42.9s  (202.928675 deg.)
    Dec =  35d  2' 60" (35.049910 deg.)
 
  Angular difference between Flight and Ground position is 1.710452 arcmin
 
  Partial Coding Fraction: 0.984375    [ including projection effects ]

  Duration
     T90: 7.59200000762939 +/- 1.93356045365311
        Measured from: 0.151999980211258
                   to: 7.74399998784065     [s; relative to TRIGTIME]
     T50: 2.3400000333786 +/- 0.206455777889674
        Measured from: 1.60399997234344
                   to: 3.94400000572205     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 2.06799998879433     
                   to: 3.06799998879433     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.580000013113022     
                   to: 12.0199999809265     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.493838   0.593816   0.373267   0.077331
           0.018043   0.018674   0.015910   0.012416 [error]
 Peak      0.110012   0.140416   0.098393   0.020081
           0.006088   0.006572   0.005505   0.003746 [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 1.45e-07 2.35e-07 2.88e-07 6.95e-07 8.65e-07 1.36e-06   erg/cm2
              Error 1.06e-08 1.00e-08 1.58e-08 8.40e-08 3.74e-08 9.53e-08   erg/cm2
Peak flux Power-law 1.02e+00 9.67e-01 6.38e-01 6.53e-01 2.89e+00 3.28e+00   ph/cm2/s
              Error 9.53e-02 5.63e-02 4.46e-02 9.20e-02 1.63e-01 1.79e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.30e-07 2.45e-07 2.96e-07 3.39e-07 8.31e-07 1.01e-06   erg/cm2
              Error 1.31e-08 1.18e-08 1.75e-08 1.35e-07 4.24e-08 1.41e-07   erg/cm2
Peak flux Cutoff-PL 8.69e-01 1.04e+00 6.85e-01 2.92e-01 2.79e+00 2.89e+00   ph/cm2/s
              Error 1.16e-01 6.83e-02 5.31e-02 1.08e-01 1.70e-01 2.03e-01   ph/cm2/s
 
Fluence        Band 1.29e-07 2.44e-07 2.96e-07 3.40e-07 8.30e-07 1.02e-06   erg/cm2
              Error 1.30e-08 1.18e-08 1.75e-08 1.35e-07 4.23e-08 1.82e-07   erg/cm2
Peak flux      Band 8.69e-01 1.04e+00 6.85e-01 2.93e-01 2.79e+00 2.89e+00   ph/cm2/s
              Error 1.16e-01 6.83e-02 5.31e-02 1.08e-01 1.70e-01 2.03e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.705    0.076    -      -           7.42e-03 3.07e-04   64.560 57
CPL   1.165    0.325      78.1   25.6      1.37e-02 5.12e-03   55.326 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.601    0.094    -      -           2.25e-02 1.26e-03   71.170 57
CPL   0.746    0.427      74.0   17.0      6.03e-02 3.07e-02   56.832 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: 20.224000 sec.
T50 in the 50-300 keV band: 2.368000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   12.600   -0.580   12.020
T90     7.592    0.152    7.744
T50     2.340    1.604    3.944
Peak    1.000    2.068    3.068

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  202.9287 +35.0499 0.0041   10.6  135.3       1.5415    47.0  TRIG_00180455       
------------------------------------------
 
Foreground time interval of the image:
 -0.580  10.429 (delta_t =  11.009 [sec])
Background time interval of the image:
-299.272  -0.580 (delta_t = 298.692 [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   -0.580 sec. to   12.020 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.70545     ( -7.591105E-02   7.641029E-02) )
Norm@50keV  : 7.418855E-03    ( -3.069900E-04   3.061076E-04) )
------------------------------------------------------------
 Chi-Squared =      64.56036     using    59 PHA bins.
 Reduced chi-squared =      1.132638     for     57 degrees of freedom
 Null hypothesis probability = 0.229
 
Photon flux (15-150 keV)    in 12.60 sec: 0.987191 ( -0.042431  0.042569 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.65074e-07 ( -3.72154e-08  3.749e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.580 sec. to   12.020 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.16545     ( -0.338038   0.311949 )
Epeak [keV] : 78.1328      ( -13.1967 38.1004 )
Norm@50keV  : 1.369943E-02    ( -3.996817E-03   6.235543E-03) )
------------------------------------------------------------
 Chi-Squared =      55.32589     using    59 PHA bins.
 Reduced chi-squared =     0.9879622     for     56 degrees of freedom
 Null hypothesis probability = 0.500
 
Photon flux (15-150 keV)    in 12.60 sec: 0.952719 ( -0.046347  0.046525 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.30607e-07 ( -4.2215e-08  4.2583e-08 ) ergs/cm2
 
Band function
Time interval is from   -0.580 sec. to   12.020 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.16545   ( -0.311940   0.338080 )
beta        : -8.90954    ( -1.09046   7.02734 )
Epeak [keV] : 78.1306      ( -13.2063 38.0973 )
Norm@50keV   : 1.369705E-02    ( -3.995983E-03   6.238885E-03) )
------------------------------------------------------------
 Chi-Squared =      55.32605     using    59 PHA bins.
 Reduced chi-squared =      1.005928     for     55 degrees of freedom
 Null hypothesis probability = 0.462
 
Photon flux (15-150 keV)    in 12.60 sec: 0.952741 ( -0.046447  0.046485 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.30056e-07 ( -4.237e-08  4.22579e-08 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    2.068 sec. to    3.068 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.60116     ( -9.322286E-02   9.399402E-02) )
Norm@50keV  : 2.249897E-02    ( -1.264013E-03   1.260316E-03) )
------------------------------------------------------------
 Chi-Squared =      71.17030     using    59 PHA bins.
 Reduced chi-squared =      1.248602     for     57 degrees of freedom
 Null hypothesis probability = 9.816E-02
 
Photon flux (15-150 keV)    in 1.000 sec: 2.89227 ( -0.16305  0.16328 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.10381e-07 ( -1.2569e-08  1.2633e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    2.068 sec. to    3.068 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.746382     ( -0.448215   0.406588 )
Epeak [keV] : 73.9800      ( -10.7436 23.2086 )
Norm@50keV  : 6.032988E-02    ( -2.212846E-02   3.927565E-02) )
------------------------------------------------------------
 Chi-Squared =      56.83214     using    59 PHA bins.
 Reduced chi-squared =      1.014860     for     56 degrees of freedom
 Null hypothesis probability = 0.444
 
Photon flux (15-150 keV)    in 1.000 sec: 2.79000 ( -0.17007  0.17012 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.00323e-07 ( -1.3515e-08  1.3585e-08 ) ergs/cm2
 
Band function
Time interval is from    2.068 sec. to    3.068 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.749336   ( -0.403628   0.444096 )
beta        : -8.98083    ( -1.01917   6.94902 )
Epeak [keV] : 74.0700      ( -10.8411 23.0950 )
Norm@50keV   : 6.011207E-02    ( -2.192198E-02   3.951473E-02) )
------------------------------------------------------------
 Chi-Squared =      56.83254     using    59 PHA bins.
 Reduced chi-squared =      1.033319     for     55 degrees of freedom
 Null hypothesis probability = 0.407
 
Photon flux (15-150 keV)    in 1.000 sec: 2.79027 ( -0.17032  0.16996 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.00142e-07 ( -1.3495e-08  1.3591e-08 ) ergs/cm2
 
Plot creation:
Mon Dec 31 11:39:13 EST 2007