batgrbproduct Analysis for Trigger=206773

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Mon Dec 31 19:39:34 EST 2007
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger206773/GCN5_download_cron
======================================================================

  Trigger: 00206773      Segment: 000

  BAT Trigger Time: 167544980.672   [s; MET]
      Trigger Stop: 167544981.696   [s; MET]
               UTC: 2006-04-24T04:16:19.520420    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 7.35525645990139   Dec: 36.8198378270448  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    10.1
     Image Trigger?:     NO
     Rate S/N Ratio:     21.2132034355964  [ if not an image trigger ]
     Image S/N Ratio:    10.1

  Flight Position:   [ source = BAT ]
    RA: 7.35525645990139   Dec: 36.8198378270448  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 7.36096520530771   Dec: 36.7844293646624  [deg; J2000]  
        { 00h 29m 26.6s , +36d 47' 03.9" }
         +/- 1.69387388328937 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.800173498727513 [arcmin] (formal 1-sigma fit error)
    SNR: 14.3266753619924
    RA  =   0h 29m 26.6s  (7.360965 deg.)
    Dec =  36d 47'  4" (36.784429 deg.)
 
  Angular difference between Flight and Ground position is 2.142138 arcmin
 
  Partial Coding Fraction: 0.53125    [ including projection effects ]

  Duration
     T90: 37.5360000133514 +/- 2.97972348753634
        Measured from: -17.6159999966621
                   to: 19.9200000166893     [s; relative to TRIGTIME]
     T50: 9.67200002074242 +/- 9.43266240268934
        Measured from: -5.24799999594688
                   to: 4.42400002479553     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.108000010251999     
                   to: 1.108000010252     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -18.7800000011921     
                   to: 20.6240000128746     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.353433   0.427468   0.272257   0.043972
           0.039366   0.040056   0.034755   0.029429 [error]
 Peak      0.060635   0.075074   0.042414   0.006372
           0.007222   0.007688   0.006742   0.004691 [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 1.13e-07 1.83e-07 2.25e-07 5.42e-07 6.76e-07 1.06e-06   erg/cm2
              Error 1.89e-08 1.94e-08 3.44e-08 1.73e-07 8.12e-08 2.04e-07   erg/cm2
Peak flux Power-law 6.18e-01 5.42e-01 3.26e-01 2.96e-01 1.61e+00 1.78e+00   ph/cm2/s
              Error 1.14e-01 6.51e-02 5.49e-02 9.74e-02 1.93e-01 2.13e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.06e-07 1.95e-07 2.30e-07 2.52e-07 6.50e-07 7.93e-07   erg/cm2
              Error 2.22e-08 1.92e-08 3.78e-08 2.27e-07 8.88e-08 3.05e-07   erg/cm2
Peak flux Cutoff-PL 5.57e-01 5.91e-01 3.39e-01 1.26e-01 1.57e+00 1.61e+00   ph/cm2/s
              Error 1.37e-01 9.01e-02 4.73e-02 1.49e-01 2.00e-01 2.51e-01   ph/cm2/s
 
Fluence        Band 1.04e-07 1.94e-07 2.29e-07 2.52e-07 6.49e-07 7.85e-07   erg/cm2
              Error 2.20e-08 2.53e-08 3.77e-08 2.85e-07 8.88e-08 3.04e-07   erg/cm2
Peak flux      Band 5.50e-01 5.97e-01 3.34e-01 1.75e-01 1.57e+00 1.66e+00   ph/cm2/s
              Error 1.38e-01 9.25e-02 6.40e-02 8.10e-02 1.49e-01 2.53e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.707    0.188    -      -           1.85e-03 2.11e-04   61.367 57
CPL   1.072    0.770      69.5 4974.0      3.99e-03 5.02e-03   59.981  0
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.733    0.206    -      -           1.20e-02 1.57e-03   62.395 57
CPL   0.956    1.038      62.2 4977.1      3.16e-02 6.89e-02   60.422 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: 6.080000 sec.
T50 in the 50-300 keV band: 3.264000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   39.404  -18.780   20.624
T90    37.536  -17.616   19.920
T50     9.672   -5.248    4.424
Peak    1.000    0.108    1.108

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
    7.3610 +36.7844 0.0133   29.7  -64.2       1.1240    14.3  TRIG_00206773       
------------------------------------------
 
Foreground time interval of the image:
-18.780  20.624 (delta_t =  39.404 [sec])
Background time interval of the image:
-239.672 -18.780 (delta_t = 220.892 [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  -18.780 sec. to   20.624 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.70658     ( -0.185652   0.190832 )
Norm@50keV  : 1.852866E-03    ( -2.126715E-04   2.095683E-04) )
------------------------------------------------------------
 Chi-Squared =      61.36689     using    59 PHA bins.
 Reduced chi-squared =      1.076612     for     57 degrees of freedom
 Null hypothesis probability = 0.322
 
Photon flux (15-150 keV)    in 39.40 sec: 0.246650 ( -0.026221  0.026252 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.75564e-07 ( -8.06439e-08  8.16841e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  -18.780 sec. to   20.624 sec.
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.07192     ( -0.774293   0.766372 )
Epeak [keV] : 69.5211      ( -17.4518 9930.48 )
Norm@50keV  : 3.986606E-03    ( -3.986606E-03   6.050473E-03) )
------------------------------------------------------------
 Chi-Squared =      59.98114     using    59 PHA bins.
 but latest trial   43.3013     gives Chi-Squared =   6.48557
 Reduced chi-squared =      1.071092     for     56 degrees of freedom
 Null hypothesis probability = 0.333
 
Photon flux (15-150 keV)    in 39.40 sec: 0.241580 ( -0.02728  0.027227 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.50041e-07 ( -8.8319e-08  8.92016e-08 ) ergs/cm2
 
Band function
Time interval is from  -18.780 sec. to   20.624 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.18358   ( -0.651708   0.595799 )
beta        : -6.99566    ( -3.00434   5.41621 )
Epeak [keV] : 74.2578      ( -16.2691 9925.74 )
Norm@50keV   : 3.498083E-03    ( -3.498083E-03   431.327 )
------------------------------------------------------------
 Chi-Squared =      59.92628     using    59 PHA bins.
 Reduced chi-squared =      1.089569     for     55 degrees of freedom
 Null hypothesis probability = 0.302
 
Photon flux (15-150 keV)    in 39.40 sec: 0.241608 ( -0.027364  0.027184 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.49477e-07 ( -8.82048e-08  8.93947e-08 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    0.108 sec. to    1.108 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.73261     ( -0.202186   0.210414 )
Norm@50keV  : 1.199907E-02    ( -1.580011E-03   1.552396E-03) )
------------------------------------------------------------
 Chi-Squared =      62.39532     using    59 PHA bins.
 Reduced chi-squared =      1.094655     for     57 degrees of freedom
 Null hypothesis probability = 0.290
 
Photon flux (15-150 keV)    in 1.000 sec: 1.61220 ( -0.19275  0.1929 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.10803e-07 ( -1.49763e-08  1.5257e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.108 sec. to    1.108 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.955765     ( -1.19172   0.884320 )
Epeak [keV] : 62.1563      ( -16.3879 9937.84 )
Norm@50keV  : 3.156006E-02    ( -3.156006E-02   0.106253 )
------------------------------------------------------------
 Chi-Squared =      60.42242     using    59 PHA bins.
 Reduced chi-squared =      1.078972     for     56 degrees of freedom
 Null hypothesis probability = 0.319
 
Photon flux (15-150 keV)    in 1.000 sec: 1.57356 ( -0.20073  0.19897 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.04796e-07 ( -1.66792e-08  1.7102e-08 ) ergs/cm2
 
Band function
Time interval is from    0.108 sec. to    1.108 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.819270   ( -9.18073   2.96262 )
beta        : -2.41629    ( -7.58370   0.762610 )
Epeak [keV] : 57.8189      ( -57.7189 832.833 )
Norm@50keV   : 3.803870E-02    ( -1.992747E-02   524.788 )
------------------------------------------------------------
 Chi-Squared =      60.08562     using    59 PHA bins.
 Reduced chi-squared =      1.092466     for     55 degrees of freedom
 Null hypothesis probability = 0.297
 
Photon flux (15-150 keV)    in 1.000 sec: 1.57196 ( -0.19975  0.0988 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.05449e-07 ( -1.6209e-08  1.6312e-08 ) ergs/cm2
 
Plot creation:
Mon Dec 31 19:59:58 EST 2007