batgrbproduct Analysis for Trigger=342121

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.42
    Process Start Time (local time): Fri Feb  6 05:02:12 EST 2009
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger342121/GCN5_download_cron
======================================================================

  Trigger: 00342121      Segment: 000

  BAT Trigger Time: 255567799.296   [s; MET]
      Trigger Stop: 255567803.392   [s; MET]
               UTC: 2009-02-05T23:03:14.820740    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 220.925433877431   Dec: -27.8637399346592  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.16
     Image Trigger?:     NO
     Rate S/N Ratio:     15.1327459504216  [ if not an image trigger ]
     Image S/N Ratio:    8.16

  Flight Position:   [ source = BAT ]
    RA: 220.925433877431   Dec: -27.8637399346592  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 220.915295813609   Dec: -27.8470907047029  [deg; J2000]  
        { 14h 43m 39.7s , -27d 50' 49.5" }
         +/- 2.00757006801937 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.87481098933619 [arcmin] (formal 1-sigma fit error)
    SNR: 11.239102932114
 
  Angular difference between Flight and Ground position is 1.134522 arcmin
 
  Partial Coding Fraction: 1.015625    [ including projection effects ]

  Duration
     T90: 8.81599998474121 +/- 1.7940791274129
        Measured from: -2.62799990177155
                   to: 6.18800008296967     [s; relative to TRIGTIME]
     T50: 4.19999998807907 +/- 1.13575349668149
        Measured from: 0.060000091791153
                   to: 4.26000007987022     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 4.09200000762939     
                   to: 5.09200000762939     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -2.92800000309944     
                   to: 6.64399999380112     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.161069   0.166144   0.059276  -0.013022
           0.017064   0.016050   0.013783   0.011673 [error]
 Peak      0.028421   0.024684   0.008427   0.000115
           0.005563   0.005277   0.004453   0.003684 [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 4.82e-08 5.99e-08 5.40e-08 8.42e-08 1.91e-07 2.45e-07   erg/cm2
              Error 7.52e-09 7.26e-09 1.21e-08 3.63e-08 2.77e-08 5.11e-08   erg/cm2
Peak flux Power-law 2.24e-01 1.63e-01 7.91e-02 5.43e-02 4.92e-01 5.21e-01   ph/cm2/s
              Error 7.36e-02 4.04e-02 3.34e-02 4.38e-02 1.20e-01 1.29e-01   ph/cm2/s
 
Fluence   Cutoff-PL 4.42e-08 6.91e-08 4.64e-08 1.10e-08 1.69e-07 1.71e-07   erg/cm2
              Error 8.67e-09 1.05e-08 1.57e-08 2.62e-08 2.92e-08 3.95e-08   erg/cm2
Peak flux Cutoff-PL 2.15e-01 1.96e-01 4.93e-02 2.22e-03 4.62e-01 4.64e-01   ph/cm2/s
              Error 6.17e-02 6.43e-02 5.01e-02 4.82e-02 1.25e-01 1.39e-01   ph/cm2/s
 
Fluence        Band 4.37e-08 6.87e-08 4.62e-08 2.41e-08 1.72e-07 1.84e-07   erg/cm2
              Error 8.38e-09 1.01e-08 1.36e-08 3.91e-08 2.39e-08 5.17e-08   erg/cm2
Peak flux      Band 2.14e-01 1.90e-01 6.57e-02 2.60e-02 4.85e-01 4.98e-01   ph/cm2/s
              Error 8.20e-02 4.14e-02 2.64e-02 4.58e-02 1.20e-01 1.29e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.150    0.230    -      -           2.14e-03 3.48e-04   69.601 57
CPL   0.794    1.293      34.3   15.5      1.40e-02 5.63e-02   64.926 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.046    0.462    -      -           3.21e-03 1.04e-03   64.827 57
CPL   0.543    0.000      33.0 5000.0      3.01e-02 0.00e+00   63.986 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    9.572   -2.928    6.644
T90     8.816   -2.628    6.188
T50     4.200    0.060    4.260
Peak    1.000    4.092    5.092

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  220.9153 -27.8471 0.0171   10.6  -28.1       0.3404    11.2  TRIG_00342121       
------------------------------------------
 
Foreground time interval of the image:
 -2.928   6.644 (delta_t =   9.572 [sec])
Background time interval of the image:
-239.296  -2.928 (delta_t = 236.368 [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   -2.928 sec. to    6.644 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.15045     ( -0.221462   0.238343 )
Norm@50keV  : 2.137356E-03    ( -3.513414E-04   3.447833E-04) )
------------------------------------------------------------
 Chi-Squared =      69.60079     using    59 PHA bins.
 Reduced chi-squared =      1.221066     for     57 degrees of freedom
 Null hypothesis probability = 0.122
 
Photon flux (15-150 keV)    in 9.572 sec: 0.344882 ( -0.040233  0.040235 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.91079e-07 ( -2.72352e-08  2.8223e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -2.928 sec. to    6.644 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.794306     ( -1.48363   1.10205 )
Epeak [keV] : 34.3399      ( -21.4858 9.52091 )
Norm@50keV  : 1.400286E-02    ( -1.400286E-02   9.862953E-02) )
------------------------------------------------------------
 Chi-Squared =      64.92557     using    59 PHA bins.
 Reduced chi-squared =      1.159385     for     56 degrees of freedom
 Null hypothesis probability = 0.194
 
Photon flux (15-150 keV)    in 9.572 sec: 0.329295 ( -0.041601  0.041784 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.6855e-07 ( -2.69911e-08  3.14019e-08 ) ergs/cm2
 
Band function
Time interval is from   -2.928 sec. to    6.644 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.11053   ( -0.665697   0.870343 )
beta        : -9.06004    ( -0.939957   6.80698 )
Epeak [keV] : 33.2657      ( -22.8783 11.0785 )
Norm@50keV   : 9.060501E-03    ( -9.060501E-03   0.148341 )
------------------------------------------------------------
 Chi-Squared =      65.11297     using    59 PHA bins.
 Reduced chi-squared =      1.183872     for     55 degrees of freedom
 Null hypothesis probability = 0.165
 
Photon flux (15-150 keV)    in 9.572 sec: 0.325396 ( -0.040394  0.038314 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.71884e-07 ( -1.77963e-08  2.99355e-08 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    4.092 sec. to    5.092 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.04637     ( -0.437029   0.486269 )
Norm@50keV  : 3.210085E-03    ( -1.053138E-03   1.024948E-03) )
------------------------------------------------------------
 Chi-Squared =      64.82702     using    59 PHA bins.
 Reduced chi-squared =      1.137316     for     57 degrees of freedom
 Null hypothesis probability = 0.222
 
Photon flux (15-150 keV)    in 1.000 sec: 0.492112 ( -0.12009  0.12009 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.97032e-08 ( -8.7059e-09  9.2676e-09 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    4.092 sec. to    5.092 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.543225     (     )
Epeak [keV] : 32.9882      ( -32.5298 9967.46 )
Norm@50keV  : 3.005782E-02    (     )
------------------------------------------------------------
 Chi-Squared =      63.98639     using    59 PHA bins.
 Reduced chi-squared =      1.142614     for     56 degrees of freedom
 Null hypothesis probability = 0.217
 
Photon flux (15-150 keV)    in 1.000 sec: 0.462161 ( -0.118163  0.132729 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.29473e-08 ( -7.4044e-09  1.47278e-08 ) ergs/cm2
 
Band function
Time interval is from    4.092 sec. to    5.092 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.852500   ( -9.14750   5.46541 )
beta        : -8.52600    (     )
Epeak [keV] : 33.6078      (   )
Norm@50keV   : 1.895214E-02    (     )
------------------------------------------------------------
 Chi-Squared =      64.01081     using    59 PHA bins.
 Reduced chi-squared =      1.163833     for     55 degrees of freedom
 Null hypothesis probability = 0.190
 
Photon flux (15-150 keV)    in 1.000 sec: 0.484944 ( -0.119348  0.120264 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.83884e-08 ( -9.3409e-09  9.1562e-09 ) ergs/cm2
 
Plot creation:
Fri Feb  6 05:27:46 EST 2009