batgrbproduct Analysis for Trigger=155242

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Wed Jan  9 10:58:53 EST 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger155242/GCN5_download_cron
======================================================================

  Trigger: 00155242      Segment: 000

  BAT Trigger Time: 148476162.048   [s; MET]
      Trigger Stop: 148476163.072   [s; MET]
               UTC: 2005-09-15T11:22:42.317800    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 81.7136478998272   Dec: -28.0303786003  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.68
     Image Trigger?:     NO
     Rate S/N Ratio:     10.5356537528527  [ if not an image trigger ]
     Image S/N Ratio:    7.68

  Flight Position:   [ source = BAT ]
    RA: 81.7136478998272   Dec: -28.0303786003  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 81.6902686793553   Dec: -28.0113745309774  [deg; J2000]  
        { 05h 26m 45.7s , -28d 00' 40.9" }
         +/- 1.42569293410932 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.441079373180435 [arcmin] (formal 1-sigma fit error)
    SNR: 18.326572156378
    RA  =   5h 26m 45.7s  (81.690269 deg.)
    Dec = -28d  0' 41" (-28.011375 deg.)
 
  Angular difference between Flight and Ground position is 1.683326 arcmin
 
  Partial Coding Fraction: 0.75    [ including projection effects ]

  Duration
     T90: 53.1039999723434 +/- 11.6650863801789
        Measured from: -6.58400002121925
                   to: 46.5199999511242     [s; relative to TRIGTIME]
     T50: 16.7359999716282 +/- 5.25624352736684
        Measured from: 0.61599999666214
                   to: 17.3519999682903     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 13.6920000016689     
                   to: 14.6920000016689     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -8.32800000905991     
                   to: 57.8319999873638     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.293932   0.491703   0.360834   0.103959
           0.040562   0.041338   0.036260   0.030629 [error]
 Peak      0.021924   0.031718   0.033957   0.020645
           0.005568   0.005844   0.005362   0.004268 [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 1.02e-07 2.00e-07 3.03e-07 1.00e-06 8.52e-07 1.60e-06   erg/cm2
              Error 1.77e-08 2.08e-08 3.58e-08 2.61e-07 8.83e-08 2.84e-07   erg/cm2
Peak flux Power-law 1.60e-01 2.27e-01 2.39e-01 4.64e-01 7.72e-01 1.09e+00   ph/cm2/s
              Error 6.45e-02 5.54e-02 4.12e-02 1.85e-01 1.41e-01 1.97e-01   ph/cm2/s
 
Fluence   Cutoff-PL 9.68e-08 2.07e-07 3.12e-07 6.26e-07 8.35e-07 1.24e-06   erg/cm2
              Error 2.09e-08 2.52e-08 4.01e-08 4.86e-07 9.63e-08 4.96e-07   erg/cm2
Peak flux Cutoff-PL 1.60e-01 2.27e-01 2.39e-01 4.61e-01 7.72e-01 1.09e+00   ph/cm2/s
              Error 6.45e-02 5.54e-02 4.12e-02 1.84e-01 1.41e-01 1.97e-01   ph/cm2/s
 
Fluence        Band 9.18e-08 2.14e-07 3.02e-07 8.34e-07 8.33e-07 1.45e-06   erg/cm2
              Error 2.39e-08 2.92e-08 3.90e-08 3.99e-07 7.06e-08 3.82e-07   erg/cm2
Peak flux      Band 1.41e-01 2.42e-01 2.42e-01 4.36e-01 7.68e-01 1.07e+00   ph/cm2/s
              Error 5.04e-02 4.74e-02 4.07e-02 1.31e-01 1.35e-01 2.17e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.398    0.167    -      -           1.33e-03 1.26e-04   64.933 57
CPL   0.964    0.612     122.6 4961.9      2.17e-03 1.63e-03   64.304 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.927    0.324    -      -           6.72e-03 1.22e-03   45.234 57
CPL   0.857    0.596     895.7    0.0      7.27e-03 1.22e-03   45.398 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: 21.696000 sec.
T50 in the 50-300 keV band: 8.768000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   66.160   -8.328   57.832
T90    53.104   -6.584   46.520
T50    16.736    0.616   17.352
Peak    1.000   13.692   14.692

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
   81.6903 -28.0114 0.0105   30.1 -148.1       0.9334    18.3  TRIG_00155242       
------------------------------------------
 
Foreground time interval of the image:
 -8.328  16.553 (delta_t =  24.881 [sec])
Background time interval of the image:
-291.847  -8.328 (delta_t = 283.519 [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   -8.328 sec. to   57.832 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.39815     ( -0.167252   0.166455 )
Norm@50keV  : 1.331806E-03    ( -1.262127E-04   1.259681E-04) )
------------------------------------------------------------
 Chi-Squared =      64.93342     using    59 PHA bins.
 Reduced chi-squared =      1.139183     for     57 degrees of freedom
 Null hypothesis probability = 0.220
 
Photon flux (15-150 keV)    in 66.16 sec: 0.162123 ( -0.015921  0.015959 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.51704e-07 ( -8.80126e-08  8.85816e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -8.328 sec. to   57.832 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.963879     ( -0.646711   0.577757 )
Epeak [keV] : 122.620      ( -46.4570 9877.38 )
Norm@50keV  : 2.172997E-03    ( -9.478887E-04   2.307550E-03) )
------------------------------------------------------------
 Chi-Squared =      64.30447     using    59 PHA bins.
 Reduced chi-squared =      1.148294     for     56 degrees of freedom
 Null hypothesis probability = 0.209
 
Photon flux (15-150 keV)    in 66.16 sec: 0.160087 ( -0.016444  0.016425 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.3486e-07 ( -9.7103e-08  9.5535e-08 ) ergs/cm2
 
Band function
Time interval is from   -8.328 sec. to   57.832 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.789838   ( -9.21016   4.23075 )
beta        : -1.55979    ( -8.44021   0.277897 )
Epeak [keV] : 83.7292      ( -83.6292 9875.46 )
Norm@50keV   : 2.926365E-03    ( -1.857818E-02   18.1334 )
------------------------------------------------------------
 Chi-Squared =      63.56662     using    59 PHA bins.
 Reduced chi-squared =      1.155757     for     55 degrees of freedom
 Null hypothesis probability = 0.200
 
Photon flux (15-150 keV)    in 66.16 sec: 0.159142 ( -0.016905  0.016177 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.32736e-07 ( -9.48073e-08  4.62988e-08 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from   13.688 sec. to   14.696 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.927439     ( -0.340207   0.307148 )
Norm@50keV  : 6.724850E-03    ( -1.238702E-03   1.195013E-03) )
------------------------------------------------------------
 Chi-Squared =      45.23358     using    59 PHA bins.
 Reduced chi-squared =     0.7935715     for     57 degrees of freedom
 Null hypothesis probability = 0.870
 
Photon flux (15-150 keV)    in 1.008 sec: 0.772179 ( -0.140569  0.141366 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.52717e-08 ( -1.30982e-08  1.31735e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   13.688 sec. to   14.696 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.856769     ( -0.809744   0.382152 )
Epeak [keV] : 895.707      (   )
Norm@50keV  : 7.272316E-03    ( -1.236893E-03   1.204476E-03) )
------------------------------------------------------------
 Chi-Squared =      45.39805     using    59 PHA bins.
 Reduced chi-squared =     0.8106795     for     56 degrees of freedom
 Null hypothesis probability = 0.844
 
Photon flux (15-150 keV)    in 1.008 sec: 0.771987 ( -0.140522  0.141342 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.5314e-08 ( -1.31359e-08  1.31667e-08 ) ergs/cm2
 
Band function
Time interval is from   13.688 sec. to   14.696 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.605564   ( -9.39444   5.60556 )
beta        : -0.945539    ( -9.05446   0.346882 )
Epeak [keV] : 125.563      ( -125.463 9874.44 )
Norm@50keV   : 1.123177E-02    ( -28.0010   74.7228 )
------------------------------------------------------------
 Chi-Squared =      45.07101     using    59 PHA bins.
 Reduced chi-squared =     0.8194730     for     55 degrees of freedom
 Null hypothesis probability = 0.828
 
Photon flux (15-150 keV)    in 1.008 sec: 0.767580 ( -0.133995  0.135635 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.59531e-08 ( -1.26076e-08  1.26235e-08 ) ergs/cm2
 
Plot creation:
Wed Jan  9 11:13:48 EST 2008