batgrbproduct Analysis for Trigger=173780

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Wed Jan  9 20:19:29 EST 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger173780/SDC2
======================================================================

  Trigger: 00173780      Segment: 000

  BAT Trigger Time: 156822675.776   [s; MET]
      Trigger Stop: 156822675.84   [s; MET]
               UTC: 2005-12-21T01:51:15.868000    [includes UTCF correction] 
       Where From?: (*SHORT BURST*) TDRSS scaled map message

  BAT 
    RA: 328.710912255944   Dec: 16.8957209657683  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    16.39
     Image Trigger?:     NO
     Rate S/N Ratio:     56.0267793113258  [ if not an image trigger ]
     Image S/N Ratio:    16.39

  Flight Position:   [ source = BAT ]
    RA: 328.710912255944   Dec: 16.8957209657683  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 328.712359871185   Dec: 16.8912204997762  [deg; J2000]  
        { 21h 54m 51.0s , +16d 53' 28.4" }
         +/- 0.617392392481095 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.202285801080562 [arcmin] (formal 1-sigma fit error)
    SNR: 60.5782272791677
    RA  =  21h 54m 51.0s  (328.712360 deg.)
    Dec =  16d 53' 28" (16.891220 deg.)
 
  Angular difference between Flight and Ground position is 0.282528 arcmin
 
  Partial Coding Fraction: 0.6328125    [ including projection effects ]

  Duration
     T90: 1.4040000140667 +/- 0.204978044855436
        Measured from: 0.0279999971389771
                   to: 1.43200001120567     [s; relative to TRIGTIME]
     T50: 0.551999986171722 +/- 0.088090862073921
        Measured from: 0.112000018358231
                   to: 0.664000004529953     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.0279999971389771     
                   to: 0.972000002861023     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.0320000052452087     
                   to: 2.09200000762939     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.457676   0.593533   0.538529   0.155522
           0.013829   0.014939   0.014062   0.010342 [error]
 Peak      0.338371   0.496512   0.487513   0.139176
           0.010942   0.012513   0.012458   0.008899 [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 1.36e-07 2.68e-07 4.09e-07 1.36e-06 1.15e-06 2.09e-06   erg/cm2
              Error 8.90e-09 9.97e-09 1.40e-08 1.12e-07 3.49e-08 0.00e+00   erg/cm2
Peak flux Power-law 3.36e+00 3.86e+00 3.19e+00 4.42e+00 1.20e+01 1.48e+01   ph/cm2/s
              Error 2.19e-01 1.48e-01 1.02e-01 3.19e-01 3.93e-01 4.34e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.36e-07 2.68e-07 4.10e-07 1.35e-06 1.15e-06 1.36e-06   erg/cm2
              Error 8.91e-09 9.98e-09 1.40e-08 1.11e-07 3.49e-08 0.00e+00   erg/cm2
Peak flux Cutoff-PL 3.27e+00 3.87e+00 3.22e+00 4.09e+00 1.19e+01 1.45e+01   ph/cm2/s
              Error 2.93e-01 1.66e-01 1.32e-01 6.77e-01 4.03e-01 8.31e-01   ph/cm2/s
 
Fluence        Band 1.35e-07 2.67e-07 4.09e-07 1.35e-06 1.15e-06 1.37e-06   erg/cm2
              Error 8.95e-09 9.93e-09 1.40e-08 1.11e-07 3.49e-08 0.00e+00   erg/cm2
Peak flux      Band 3.26e+00 3.87e+00 3.22e+00 4.20e+00 1.19e+01 1.45e+01   ph/cm2/s
              Error 2.49e-01 1.51e-01 1.31e-01 5.27e-01 4.26e-01 8.12e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.389    0.058    -      -           5.58e-02 1.65e-03   55.195 57
CPL   1.343    0.122     840.9    0.0      5.84e-02 1.66e-03   55.764 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.276    0.056    -      -           1.01e-01 2.99e-03   61.796 57
CPL   1.182    0.195     524.9 5000.0      1.11e-01 2.04e-02   61.365  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: 1.280000 sec.
T50 in the 50-300 keV band: 0.128000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    2.124   -0.032    2.092
T90     1.404    0.028    1.432
T50     0.552    0.112    0.664
Peak    1.000   -0.028    0.972

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  328.7124 +16.8912 0.0032   36.6 -178.6       1.8092    60.6  TRIG_00173780       
------------------------------------------
 
Foreground time interval of the image:
  0.224   2.348 (delta_t =   2.124 [sec])
Background time interval of the image:
-219.915   0.224 (delta_t = 220.139 [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    0.224 sec. to    2.348 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.38936     ( -5.800664E-02   5.796516E-02) )
Norm@50keV  : 5.576153E-02    ( -1.654625E-03   1.652703E-03) )
------------------------------------------------------------
 Chi-Squared =      55.19547     using    59 PHA bins.
 Reduced chi-squared =     0.9683416     for     57 degrees of freedom
 Null hypothesis probability = 0.543
 
Photon flux (15-150 keV)    in 2.124 sec: 6.77449 ( -0.22949  0.23054 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.14695e-06 ( -3.48591e-08  3.48761e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.224 sec. to    2.348 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.34266     ( -0.136570   0.106885 )
Epeak [keV] : 840.851      (   )
Norm@50keV  : 5.840328E-02    ( -1.657277E-03   1.654863E-03) )
------------------------------------------------------------
 Chi-Squared =      55.76365     using    59 PHA bins.
 Reduced chi-squared =     0.9957795     for     56 degrees of freedom
 Null hypothesis probability = 0.484
 
Photon flux (15-150 keV)    in 2.124 sec: 6.77062 ( -0.22929  0.23044 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.14723e-06 ( -3.48718e-08  3.48952e-08 ) ergs/cm2
 
Band function
Time interval is from    0.224 sec. to    2.348 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.08585   ( -8.91415   2.76727 )
beta        : -1.38910    ( -5.809164E-02   5.779517E-02) )
Epeak [keV] : 45.4195      ( -45.3195 9954.58 )
Norm@50keV   : 0.108661    ( -3.193275E-02   7.47134 )
------------------------------------------------------------
 Chi-Squared =      55.19897     using    59 PHA bins.
 Reduced chi-squared =      1.003618     for     55 degrees of freedom
 Null hypothesis probability = 0.467
 
Photon flux (15-150 keV)    in 2.124 sec: 7.54504 ( -0.9694  10.5112 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.14621e-06 ( -3.484e-08  3.48867e-08 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    0.228 sec. to    1.228 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.27633     ( -5.563009E-02   5.549657E-02) )
Norm@50keV  : 0.101009    ( -2.994463E-03   2.989374E-03) )
------------------------------------------------------------
 Chi-Squared =      61.79592     using    59 PHA bins.
 Reduced chi-squared =      1.084139     for     57 degrees of freedom
 Null hypothesis probability = 0.309
 
Photon flux (15-150 keV)    in 1.000 sec: 11.9997 ( -0.3922  0.3941 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.00405e-06 ( -3.0538e-08  3.0572e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.228 sec. to    1.228 sec.
Parameters  : value       lower 90%   higher 90%
Photon index: 1.18194     ( -0.222992   0.167650 )
Epeak [keV] : 524.945      ( -524.935 9475.06 )
Norm@50keV  : 0.110723    ( -1.473510E-02   2.606691E-02) )
------------------------------------------------------------
 Chi-Squared =      61.36505     using    59 PHA bins.
 but latest trial   1.31331     gives Chi-Squared =   1.87336
 but latest trial  0.100383     gives Chi-Squared =  0.729012
 Reduced chi-squared =      1.095804     for     56 degrees of freedom
 Null hypothesis probability = 0.290
 
Photon flux (15-150 keV)    in 1.000 sec: 11.9354 ( -0.3837  0.423 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.00202e-06 ( -3.145e-08  3.0943e-08 ) ergs/cm2
 
Band function
Time interval is from    0.228 sec. to    1.228 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.977578   ( -9.02242   2.89644 )
beta        : -1.27609    ( -5.573153E-02   5.546749E-02) )
Epeak [keV] : 55.6759      ( -905.098 9094.80 )
Norm@50keV   : 0.190420    ( -7.607348E-03   7.364608E+06) )
------------------------------------------------------------
 Chi-Squared =      61.80160     using    59 PHA bins.
 Reduced chi-squared =      1.123665     for     55 degrees of freedom
 Null hypothesis probability = 0.246
 
Photon flux (15-150 keV)    in 1.000 sec: 11.9211 ( -0.4182  0.4334 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.00096e-06 ( -3.1548e-08  3.1398e-08 ) ergs/cm2
 
Plot creation:
Wed Jan  9 20:39:48 EST 2008