batgrbproduct Analysis for Trigger=286809

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Fri Dec 14 06:25:46 EST 2007
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger286809/SDC
======================================================================

  Trigger: 00286809      Segment: 000

  BAT Trigger Time: 207731248   [s; MET]
      Trigger Stop: 207731312   [s; MET]
               UTC: 2007-08-02T07:07:25.872160    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 36.850987019423   Dec: -55.5364556715457  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.15
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    7.15

  Flight Position:   [ source = BAT ]
    RA: 36.850987019423   Dec: -55.5364556715457  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 36.9043963624921   Dec: -55.5109967666254  [deg; J2000]  
        { 02h 27m 37.1s , -55d 30' 39.6" }
         +/- 2.00529269807257 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.06973912368035 [arcmin] (formal 1-sigma fit error)
    SNR: 11.2573416823303
    RA  =   2h 27m 37.1s  (36.904396 deg.)
    Dec = -55d 30' 40" (-55.510997 deg.)
 
  Angular difference between Flight and Ground position is 2.371480 arcmin
 
  Partial Coding Fraction: 0.734375    [ including projection effects ]

  Duration
     T90: 16.9079999923706 +/- 3.01981259231406
        Measured from: 5.54800000786781
                   to: 22.4560000002384     [s; relative to TRIGTIME]
     T50: 6.96400001645088 +/- 2.78514127583814
        Measured from: 8.43999999761581
                   to: 15.4040000140667     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 6.15200001001358     
                   to: 7.15200001001358     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 4.80399999022484     
                   to: 24.3120000064373     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.153412   0.206410   0.092849   0.049804
           0.024491   0.024453   0.021342   0.018723 [error]
 Peak      0.021410   0.013463   0.013935   0.005997
           0.005517   0.005872   0.004882   0.004089 [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 5.12e-08 7.82e-08 8.96e-08 1.96e-07 2.77e-07 4.18e-07   erg/cm2
              Error 1.13e-08 1.14e-08 2.10e-08 9.40e-08 4.86e-08 1.15e-07   erg/cm2
Peak flux Power-law 2.11e-01 1.46e-01 6.60e-02 4.15e-02 4.43e-01 4.65e-01   ph/cm2/s
              Error 9.77e-02 5.25e-02 5.60e-02 5.87e-02 1.39e-01 1.51e-01   ph/cm2/s
 
Fluence   Cutoff-PL 4.92e-08 8.25e-08 8.95e-08 9.65e-08 2.66e-07 3.13e-07   erg/cm2
              Error 1.26e-08 1.55e-08 2.31e-08 1.47e-07 5.57e-08 1.56e-07   erg/cm2
Peak flux Cutoff-PL 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   ph/cm2/s
              Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   ph/cm2/s
 
Fluence        Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   erg/cm2
              Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   erg/cm2
Peak flux      Band 4.64e-01 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   ph/cm2/s
              Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.805    0.272    -      -           1.54e-03 2.64e-04   48.347 57
CPL   1.188    0.000      57.7 5000.0      3.40e-03 7.72e-03   48.036 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.143    0.920    -      -           2.76e-03 1.49e-03   65.166 57
CPL   2.223    0.000      96.5    0.0      2.35e-03 0.00e+00   64.985 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   19.508    4.804   24.312
T90    16.908    5.548   22.456
T50     6.964    8.440   15.404
Peak    1.000    6.152    7.152

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
   36.9044 -55.5110 0.0171   25.4   28.5       0.5253    11.3  TRIG_00286809       
------------------------------------------
 
Foreground time interval of the image:
  4.804  24.312 (delta_t =  19.508 [sec])
Background time interval of the image:
-130.795   4.804 (delta_t = 135.599 [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    4.804 sec. to   24.312 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.80476     ( -0.264755   0.279406 )
Norm@50keV  : 1.544718E-03    ( -2.684044E-04   2.603913E-04) )
------------------------------------------------------------
 Chi-Squared =      48.34654     using    59 PHA bins.
 Reduced chi-squared =     0.8481849     for     57 degrees of freedom
 Null hypothesis probability = 0.786
 
Photon flux (15-150 keV)    in 19.51 sec: 0.213250 ( -0.031306  0.031322 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.77415e-07 ( -4.80434e-08  4.92452e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    4.804 sec. to   24.312 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.18784     (     )
Epeak [keV] : 57.6980      ( -69.6242 9930.37 )
Norm@50keV  : 3.399351E-03    ( -2.365487E-03   1.308280E-02) )
------------------------------------------------------------
 Chi-Squared =      48.03561     using    59 PHA bins.
 Reduced chi-squared =     0.8577788     for     56 degrees of freedom
 Null hypothesis probability = 0.767
 
Photon flux (15-150 keV)    in 19.51 sec: 0.210181 ( -0.03244  0.032254 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.66452e-07 ( -5.5067e-08  5.63176e-08 ) ergs/cm2
 
Band function
Time interval is from    4.804 sec. to   24.312 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.14523   ( -8.85477   4.97505 )
beta        : -2.05813    ( -7.94187   0.490048 )
Epeak [keV] : 50.1756      ( -50.0756 407.249 )
Norm@50keV   : 3.829267E-03    ( -3.829267E-03   206.012 )
------------------------------------------------------------
 Chi-Squared =      47.81171     using    59 PHA bins.
 Reduced chi-squared =     0.8693038     for     55 degrees of freedom
 Null hypothesis probability = 0.743
 
Photon flux (15-150 keV)    in 19.51 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    6.152 sec. to    7.152 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.14289     ( -0.694689   1.14434 )
Norm@50keV  : 2.757749E-03    ( -1.684669E-03   1.299275E-03) )
------------------------------------------------------------
 Chi-Squared =      65.16558     using    59 PHA bins.
 Reduced chi-squared =      1.143256     for     57 degrees of freedom
 Null hypothesis probability = 0.214
 
Photon flux (15-150 keV)    in 1.000 sec: 0.443463 ( -0.139117  0.139108 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.57564e-08 ( -1.15324e-08  1.1717e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    6.152 sec. to    7.152 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.22316     (     )
Epeak [keV] : 96.4566      (   )
Norm@50keV  : 2.354704E-03    (     )
------------------------------------------------------------
 Chi-Squared =      64.98494     using    59 PHA bins.
 Reduced chi-squared =      1.160445     for     56 degrees of freedom
 Null hypothesis probability = 0.192
 
Photon flux (15-150 keV)    in 1.000 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 
Band function
Time interval is from    6.152 sec. to    7.152 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.54226   ( -5.38416   4.02121 )
beta        : -3.04085    ( -1.13971   0.697919 )
Epeak [keV] : 56.4529      ( -56.3529 9943.55 )
Norm@50keV   : 4.559733E-03    ( -0.374096   0.177428 )
------------------------------------------------------------
 Chi-Squared =      66.12431     using    59 PHA bins.
 Reduced chi-squared =      1.202260     for     55 degrees of freedom
 Null hypothesis probability = 0.145
 
Photon flux (15-150 keV)    in 1.000 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 
Plot creation:
Fri Dec 14 06:47:26 EST 2007