batgrbproduct Analysis for Trigger=261299

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Thu Dec 13 14:31:44 EST 2007
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger261299/GCN5_download_cron
======================================================================

  Trigger: 00261299      Segment: 000

  BAT Trigger Time: 193639474.688   [s; MET]
      Trigger Stop: 193639475.712   [s; MET]
               UTC: 2007-02-20T04:44:32.912080    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 34.8193073293135   Dec: 68.8182975953661  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    10.51
     Image Trigger?:     NO
     Rate S/N Ratio:     20.8326666559997  [ if not an image trigger ]
     Image S/N Ratio:    10.51

  Flight Position:   [ source = BAT ]
    RA: 34.8193073293135   Dec: 68.8182975953661  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 34.7966461173086   Dec: 68.8031039160298  [deg; J2000]  
        { 02h 19m 11.2s , +68d 48' 11.2" }
         +/- 0.677610919199762 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.173722926959066 [arcmin] (formal 1-sigma fit error)
    SNR: 53.0365123687117
    RA  =   2h 19m 11.2s  (34.796646 deg.)
    Dec =  68d 48' 11" (68.803104 deg.)
 
  Angular difference between Flight and Ground position is 1.035654 arcmin
 
  Partial Coding Fraction: 0.640625    [ including projection effects ]

  Duration
     T90: 129.180000007153 +/- 19.1590526768142
        Measured from: -1.32400000095367
                   to: 127.856000006199     [s; relative to TRIGTIME]
     T50: 35.0080000162125 +/- 1.49728820392928
        Measured from: 8.95600000023842
                   to: 43.9640000164509     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 11.8600000143051     
                   to: 12.8600000143051     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -17.1200000047684     
                   to: 239.788000017405     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     4.096122   5.678223   4.809678   1.448586
           0.089091   0.092216   0.085993   0.081878 [error]
 Peak      0.154250   0.243988   0.244915   0.071355
           0.009031   0.010372   0.010650   0.008913 [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 1.35e-06 2.55e-06 3.73e-06 1.16e-05 1.06e-05 1.92e-05   erg/cm2
              Error 6.80e-08 7.24e-08 9.36e-08 7.20e-07 2.34e-07 7.43e-07   erg/cm2
Peak flux Power-law 1.54e+00 1.86e+00 1.63e+00 2.44e+00 5.88e+00 7.46e+00   ph/cm2/s
              Error 1.47e-01 1.06e-01 8.42e-02 2.75e-01 2.86e-01 3.57e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.29e-06 2.56e-06 3.79e-06 9.72e-06 1.05e-05 1.73e-05   erg/cm2
              Error 9.49e-08 7.39e-08 1.14e-07 2.02e-06 2.56e-07 2.03e-06   erg/cm2
Peak flux Cutoff-PL 1.43e+00 1.89e+00 1.69e+00 1.85e+00 5.81e+00 6.86e+00   ph/cm2/s
              Error 1.90e-01 1.14e-01 1.09e-01 5.44e-01 2.95e-01 6.79e-01   ph/cm2/s
 
Fluence        Band 1.32e-06 2.56e-06 3.72e-06 9.76e-06 1.05e-05 1.91e-05   erg/cm2
              Error 1.03e-07 7.44e-08 8.67e-08 2.57e-07 7.36e-07 0.00e+00   erg/cm2
Peak flux      Band 1.42e+00 1.89e+00 1.68e+00 2.03e+00 5.80e+00 7.05e+00   ph/cm2/s
              Error 1.95e-01 1.20e-01 1.13e-01 7.30e-01 2.95e-01 6.11e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.453    0.044    -      -           4.30e-03 9.49e-05   42.895 57
CPL   1.276    0.183     243.2 4922.9      5.10e-03 8.50e-04   40.817  0
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.194    0.083    -      -           5.01e-02 2.31e-03   43.070 57
CPL   0.914    0.342     223.3 4936.1      6.69e-02 2.38e-02   40.931 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: 160.832000 sec.
T50 in the 50-300 keV band: 33.024000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  256.908  -17.120  239.788
T90   129.180   -1.324  127.856
T50    35.008    8.956   43.964
Peak    1.000   11.860   12.860

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
   34.7966 +68.8031 0.0036   38.5 -167.9       4.7506    53.0  TRIG_00261299       
------------------------------------------
 
Foreground time interval of the image:
-17.120  10.313 (delta_t =  27.433 [sec])
Background time interval of the image:
-239.688 -17.120 (delta_t = 222.568 [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  -17.120 sec. to  239.788 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.45338     ( -4.450524E-02   4.443252E-02) )
Norm@50keV  : 4.299021E-03    ( -9.492924E-05   9.483099E-05) )
------------------------------------------------------------
 Chi-Squared =      42.89532     using    59 PHA bins.
 Reduced chi-squared =     0.7525494     for     57 degrees of freedom
 Null hypothesis probability = 0.917
 
Photon flux (15-150 keV)    in 256.9 sec: 0.530241 ( -0.013937  0.014016 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.0562e-05 ( -2.33985e-07  2.34062e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  -17.120 sec. to  239.788 sec.
Parameters  : value       lower 90%   higher 90%
Photon index: 1.27650     ( -0.168283   0.197410 )
Epeak [keV] : 243.228      ( -89.0992 9756.77 )
Norm@50keV  : 5.100837E-03    ( -8.278857E-04   8.718525E-04) )
------------------------------------------------------------
 Chi-Squared =      40.81709     using    59 PHA bins.
 but latest trial   1.47196     gives Chi-Squared =   3.68344
 but latest trial  4.332143E-03 gives Chi-Squared =   2.09752
 Reduced chi-squared =     0.7288767     for     56 degrees of freedom
 Null hypothesis probability = 0.936
 
Photon flux (15-150 keV)    in 256.9 sec: 0.522651 ( -0.01622  0.008202 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.04772e-05 ( -2.57208e-07  2.55076e-07 ) ergs/cm2
 
Band function
Time interval is from  -17.120 sec. to  239.788 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.08626   ( -8.91374   2.96260 )
beta        : -1.45669    ( -8.07906   0.489416 )
Epeak [keV] : 65.1562      ( -127.628 9717.90 )
Norm@50keV   : 7.895288E-03    ( -5.479995E-04   8.59664 )
------------------------------------------------------------
 Chi-Squared =      42.68131     using    59 PHA bins.
 Reduced chi-squared =     0.7760238     for     55 degrees of freedom
 Null hypothesis probability = 0.887
 
Photon flux (15-150 keV)    in 256.9 sec: 0.522649 ( -0.016229  0.016362 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.04683e-05 ( -2.59109e-07  2.55025e-07 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from   11.860 sec. to   12.860 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.19397     ( -8.332169E-02   8.285904E-02) )
Norm@50keV  : 5.014394E-02    ( -2.315562E-03   2.313800E-03) )
------------------------------------------------------------
 Chi-Squared =      43.06982     using    59 PHA bins.
 Reduced chi-squared =     0.7556109     for     57 degrees of freedom
 Null hypothesis probability = 0.914
 
Photon flux (15-150 keV)    in 1.000 sec: 5.88090 ( -0.28546  0.28599 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.0964e-07 ( -2.5367e-08  2.5418e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   11.860 sec. to   12.860 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.914408     ( -0.369436   0.315310 )
Epeak [keV] : 223.264      ( -95.4303 9776.74 )
Norm@50keV  : 6.692624E-02    ( -1.765887E-02   3.003105E-02) )
------------------------------------------------------------
 Chi-Squared =      40.93084     using    59 PHA bins.
 Reduced chi-squared =     0.7309079     for     56 degrees of freedom
 Null hypothesis probability = 0.935
 
Photon flux (15-150 keV)    in 1.000 sec: 5.81090 ( -0.29312  0.29648 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.04533e-07 ( -2.6706e-08  2.6376e-08 ) ergs/cm2
 
Band function
Time interval is from   11.860 sec. to   12.860 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.871138   ( -9.12886   0.657696 )
beta        : -1.48857    ( -8.51143   0.336558 )
Epeak [keV] : 195.524      ( -195.424 9804.48 )
Norm@50keV   : 7.039363E-02    ( -2.100442E-02   2871.26 )
------------------------------------------------------------
 Chi-Squared =      40.82315     using    59 PHA bins.
 Reduced chi-squared =     0.7422391     for     55 degrees of freedom
 Null hypothesis probability = 0.923
 
Photon flux (15-150 keV)    in 1.000 sec: 5.79841 ( -0.28634  0.30343 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.04177e-07 ( -2.6675e-08  2.6378e-08 ) ergs/cm2
 
Plot creation:
Thu Dec 13 14:51:03 EST 2007