batgrbproduct Analysis for Trigger=115135

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Sat Jan  5 00:51:43 EST 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger115135/SDC
======================================================================

  Trigger: 00115135      Segment: 000

  BAT Trigger Time: 135749511.104   [s; MET]
      Trigger Stop: 135749516.608   [s; MET]
               UTC: 2005-04-21T04:11:51.617220    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 307.241049309564   Dec: 73.6651583611281  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    6
     Image Trigger?:     NO
     Rate S/N Ratio:     9.8488578017961  [ if not an image trigger ]
     Image S/N Ratio:    6

  Flight Position:   [ source = BAT ]
    RA: 307.241049309564   Dec: 73.6651583611281  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 307.381699982485   Dec: 73.6777505394526  [deg; J2000]  
        { 20h 29m 31.6s , +73d 40' 39.9" }
         +/- 2.89843791129835 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.2940931335496 [arcmin] (formal 1-sigma fit error)
    SNR: 6.65095626439395
    RA  =  20h 29m 31.6s  (307.381700 deg.)
    Dec =  73d 40' 40" (73.677751 deg.)
 
  Angular difference between Flight and Ground position is 2.489984 arcmin
 
  Partial Coding Fraction: 0.875    [ including projection effects ]

  Duration
     T90: 8.41200000047684 +/- 3.45037504459753
        Measured from: 0.196000009775162
                   to: 8.608000010252     [s; relative to TRIGTIME]
     T50: 2.56800001859665 +/- 3.48308197144675
        Measured from: 0.947999984025955
                   to: 3.5160000026226     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.403999984264374     
                   to: 1.40399998426437     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0.0439999997615814     
                   to: 8.74000000953674     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.042256   0.059828   0.040627   0.011346
           0.013255   0.013746   0.012063   0.010288 [error]
 Peak      0.015829   0.015937   0.015696   0.002942
           0.004610   0.004815   0.004240   0.003556 [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 1.49e-08 2.50e-08 3.19e-08 8.18e-08 9.45e-08 1.54e-07   erg/cm2
              Error 5.63e-09 6.23e-09 1.15e-08 6.17e-08 2.74e-08 7.23e-08   erg/cm2
Peak flux Power-law 1.52e-01 1.45e-01 9.71e-02 1.01e-01 4.35e-01 4.96e-01   ph/cm2/s
              Error 6.42e-02 3.92e-02 3.46e-02 7.37e-02 1.14e-01 1.32e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.32e-08 2.81e-08 3.28e-08 2.21e-08 8.78e-08 9.68e-08   erg/cm2
              Error 6.75e-09 8.99e-09 1.38e-08 7.24e-08 2.96e-08 8.19e-08   erg/cm2
Peak flux Cutoff-PL 1.52e-01 1.47e-01 9.76e-02 9.21e-02 4.35e-01 4.87e-01   ph/cm2/s
              Error 6.41e-02 4.59e-02 3.77e-02 9.47e-02 1.13e-01 1.49e-01   ph/cm2/s
 
Fluence        Band 1.31e-08 2.80e-08 3.27e-08 2.22e-08 8.78e-08 9.55e-08   erg/cm2
              Error 6.66e-09 8.90e-09 1.37e-08 7.23e-08 2.96e-08 7.52e-08   erg/cm2
Peak flux      Band 1.46e-01 1.49e-01 9.86e-02 9.14e-02 4.34e-01 4.78e-01   ph/cm2/s
              Error 7.08e-02 4.22e-02 3.72e-02 6.68e-02 1.14e-01 2.02e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.649    0.440    -      -           1.17e-03 3.18e-04   36.888 57
CPL   0.673    2.261      63.0 5000.0      3.92e-03 7.63e-02   36.212  0
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.583    0.472    -      -           3.41e-03 9.54e-04   62.246 57
CPL   1.385    1.579     152.5 5000.0      4.30e-03 2.22e-02   62.250  0
 
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    8.696    0.044    8.740
T90     8.412    0.196    8.608
T50     2.568    0.948    3.516
Peak    1.000    0.404    1.404

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  307.3817 +73.6778 0.0291   25.3    3.9       0.1580     6.7  TRIG_00115135       
------------------------------------------
 
Foreground time interval of the image:
  0.044   8.740 (delta_t =   8.696 [sec])
Background time interval of the image:
-247.099   0.044 (delta_t = 247.143 [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    0.044 sec. to    8.740 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.64877     ( -0.424454   0.455767 )
Norm@50keV  : 1.168606E-03    ( -3.242294E-04   3.127481E-04) )
------------------------------------------------------------
 Chi-Squared =      36.88845     using    59 PHA bins.
 Reduced chi-squared =     0.6471657     for     57 degrees of freedom
 Null hypothesis probability = 0.982
 
Photon flux (15-150 keV)    in 8.696 sec: 0.152523 ( -0.037898  0.037933 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.45377e-08 ( -2.70093e-08  2.78898e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.044 sec. to    8.740 sec.
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.672962     ( -2.99466   1.52813 )
Epeak [keV] : 62.9511      ( -62.9411 9937.05 )
Norm@50keV  : 3.918948E-03    ( -3.918949E-03   0.148615 )
------------------------------------------------------------
 Chi-Squared =      36.21175     using    59 PHA bins.
 but latest trial   2.20109     gives Chi-Squared =   12.6256
 Reduced chi-squared =     0.6466383     for     56 degrees of freedom
 Null hypothesis probability = 0.981
 
Photon flux (15-150 keV)    in 8.696 sec: 0.147825 ( -0.039637  0.039261 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.78279e-08 ( -2.82463e-08  3.09882e-08 ) ergs/cm2
 
Band function
Time interval is from    0.044 sec. to    8.740 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.990885   ( -9.00912   5.99088 )
beta        : -2.33814    ( -7.66186   10.0340 )
Epeak [keV] : 74.9245      ( -74.8245 9925.08 )
Norm@50keV   : 2.566823E-03    ( -2.566823E-03   4.198292E-02) )
------------------------------------------------------------
 Chi-Squared =      36.27911     using    59 PHA bins.
 Reduced chi-squared =     0.6596201     for     55 degrees of freedom
 Null hypothesis probability = 0.976
 
Photon flux (15-150 keV)    in 8.696 sec: 0.148393 ( -0.039142  0.038557 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.77774e-08 ( -2.81012e-08  3.10273e-08 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    0.404 sec. to    1.404 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.58261     ( -0.459204   0.485656 )
Norm@50keV  : 3.406874E-03    ( -9.719250E-04   9.358416E-04) )
------------------------------------------------------------
 Chi-Squared =      62.24583     using    59 PHA bins.
 Reduced chi-squared =      1.092032     for     57 degrees of freedom
 Null hypothesis probability = 0.295
 
Photon flux (15-150 keV)    in 1.000 sec: 0.435474 ( -0.114265  0.114402 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.1965e-08 ( -9.5813e-09  9.7568e-09 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.404 sec. to    1.404 sec.
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.38506     ( -1.97049   1.18822 )
Epeak [keV] : 152.459      ( -152.449 9847.54 )
Norm@50keV  : 4.297512E-03    ( -4.297512E-03   4.014889E-02) )
------------------------------------------------------------
 Chi-Squared =      62.25048     using    59 PHA bins.
 but latest trial   2.57294     gives Chi-Squared =   1.22998
 Reduced chi-squared =      1.111616     for     56 degrees of freedom
 Null hypothesis probability = 0.264
 
Photon flux (15-150 keV)    in 1.000 sec: 0.434755 ( -0.113537  0.11332 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.14857e-08 ( -9.6925e-09  1.02392e-08 ) ergs/cm2
 
Band function
Time interval is from    0.404 sec. to    1.404 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.10699   ( -8.89301   6.10699 )
beta        : -2.28672    ( -8.35218   11.3660 )
Epeak [keV] : 93.9561      ( -61.4371 9938.46 )
Norm@50keV   : 5.897439E-03    ( -6.954658E-03   112.203 )
------------------------------------------------------------
 Chi-Squared =      62.36347     using    59 PHA bins.
 Reduced chi-squared =      1.133881     for     55 degrees of freedom
 Null hypothesis probability = 0.231
 
Photon flux (15-150 keV)    in 1.000 sec: 0.433975 ( -0.114068  0.113732 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.14953e-08 ( -8.8341e-09  1.0183e-08 ) ergs/cm2
 
Plot creation:
Sat Jan  5 01:03:59 EST 2008