batgrbproduct Analysis for Trigger=381591

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.45
    Process Start Time (local time): Thu Dec 31 20:00:49 EST 2009
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger381591/GCN5_download_cron
======================================================================

  Trigger: 00381591      Segment: 000

  BAT Trigger Time: 283974262.848   [s; MET]
      Trigger Stop: 283974279.232   [s; MET]
               UTC: 2009-12-31T17:44:17.450720    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 235.079216103307   Dec: -8.73771854118322  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.25
     Image Trigger?:     NO
     Rate S/N Ratio:     12.6095202129185  [ if not an image trigger ]
     Image S/N Ratio:    7.25

  Flight Position:   [ source = BAT ]
    RA: 235.079216103307   Dec: -8.73771854118322  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 235.135201447304   Dec: -8.78435230469922  [deg; J2000]  
        { 15h 40m 32.4s , -08d 47' 03.7" }
         +/- 3.43170437773798 [arcmin] (estimated 90% radius based on SNR)
         +/- 2.10533762296649 [arcmin] (formal 1-sigma fit error)
    SNR: 5.22521640639059
 
  Angular difference between Flight and Ground position is 4.341758 arcmin
 
  Partial Coding Fraction: 1.015625    [ including projection effects ]

  Duration
     T90: 65 +/- 23.8537208837531
        Measured from: -20.8479998707771
                   to: 44.1520001292229     [s; relative to TRIGTIME]
     T50: 30 +/- 22.2036033111745
        Measured from: -6.84799987077713
                   to: 23.1520001292229     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 44.1520000100136     
                   to: 45.1520000100136     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -21.8479999899864     
                   to: 45.1520000100136     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.293261   0.123496   0.096529   0.081376
           0.054136   0.044539   0.039050   0.035191 [error]
 Peak      0.019333   0.012933  -0.000389   0.006277
           0.006550   0.005548   0.004750   0.004209 [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 6.81e-08 6.79e-08 4.76e-08 5.28e-08 2.05e-07 2.36e-07   erg/cm2
              Error 2.47e-08 2.30e-08 3.41e-08 8.19e-08 7.62e-08 1.27e-07   erg/cm2
Peak flux Power-law 2.34e-01 5.43e-02 6.46e-03 8.53e-04 2.96e-01 2.96e-01   ph/cm2/s
              Error 9.67e-02 4.70e-02 1.43e-02 5.20e-03 1.30e-01 1.31e-01   ph/cm2/s
 
Fluence   Cutoff-PL 6.81e-08 6.80e-08 4.76e-08 5.23e-08 2.04e-07 2.36e-07   erg/cm2
              Error 2.47e-08 2.30e-08 3.41e-08 8.12e-08 7.62e-08 1.26e-07   erg/cm2
Peak flux Cutoff-PL 2.34e-01 5.43e-02 6.44e-03 8.46e-04 2.96e-01 2.96e-01   ph/cm2/s
              Error 9.66e-02 4.70e-02 1.42e-02 5.16e-03 1.30e-01 1.31e-01   ph/cm2/s
 
Fluence        Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   erg/cm2
              Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   erg/cm2
Peak flux      Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   ph/cm2/s
              Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.513    0.754    -      -           3.04e-04 1.56e-04   59.200 57
CPL   1.864    0.000       8.7    0.0      7.14e-04 0.00e+00   60.120 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    4.072    1.796    -      -           4.50e-04 7.27e-04   64.310 57
CPL   1.000    0.000      50.0    0.0      4.59e-03 0.00e+00   73.330 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   67.000  -21.848   45.152
T90    65.000  -20.848   44.152
T50    30.000   -6.848   23.152
Peak    1.000   44.152   45.152

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  235.1352  -8.7844 0.0369   14.2  -27.9       0.5377     5.2  TRIG_00381591       
------------------------------------------
 
Foreground time interval of the image:
-21.848  45.152 (delta_t =  67.000 [sec])
Background time interval of the image:
-239.848 -21.848 (delta_t = 218.000 [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  -21.848 sec. to   45.152 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.51334     ( -0.670074   0.838005 )
Norm@50keV  : 3.04143E-04    ( -0.000156227   0.000156176 )
------------------------------------------------------------
# Chi-Squared =          59.20 using 59 PHA bins.
# Reduced chi-squared =          1.039 for     57 degrees of freedom 
# Null hypothesis probability =   3.950660e-01
 
Photon flux (15-150 keV)    in 67 sec: 6.02476E-02 ( -0.016604  0.0166051 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.04517e-07 ( -7.14059e-08  8.09608e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  -21.848 sec. to   45.152 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.86389     (     )
Epeak [keV] : 8.72977      (   )
Norm@50keV  : 7.13907E-04    (     )
------------------------------------------------------------
# Chi-Squared =          60.12 using 59 PHA bins.
# Reduced chi-squared =          1.073 for     56 degrees of freedom 
# Null hypothesis probability =   3.291062e-01
 
Photon flux (15-150 keV)    in 67 sec: 6.02188E-02 ( -0.0165973  0.0165987 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.04439e-07 ( -7.13798e-08  8.094e-08 ) ergs/cm2
 
Band function
Time interval is from  -21.848 sec. to   45.152 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.59768   ( 1.59773   1.59773 )
beta        : -2.53143    ( 2.53346   0.68316 )
Epeak [keV] : 8.22496      ( -8.20129 50.8085 )
Norm@50keV   : 1.88565E-03    ( -0.0018957   21.6914 )
------------------------------------------------------------
# Chi-Squared =          59.14 using 59 PHA bins.
# Reduced chi-squared =          1.075 for     55 degrees of freedom 
# Null hypothesis probability =   3.267928e-01
 
Photon flux (15-150 keV)    in 67 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from   44.152 sec. to   45.152 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 4.07205     ( -1.32832   2.26452 )
Norm@50keV  : 4.50172E-04    ( -0.000450172   0.00100399 )
------------------------------------------------------------
# Chi-Squared =          64.31 using 59 PHA bins.
# Reduced chi-squared =          1.128 for     57 degrees of freedom 
# Null hypothesis probability =   2.359713e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.295706 ( -0.129424  0.131497 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.04548e-08 ( -5.27814e-09  6.70468e-09 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   44.152 sec. to   45.152 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.00000     (     )
Epeak [keV] : 50.0000      (   )
Norm@50keV  : 4.59059E-03    (     )
------------------------------------------------------------
# Chi-Squared =          73.33 using 59 PHA bins.
# Reduced chi-squared =          1.309 for     56 degrees of freedom 
# Null hypothesis probability =   5.997745e-02
 
Photon flux (15-150 keV)    in 1 sec: 0.295523 ( -0.129388  0.131455 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.64747e-09 ( -4.64132e-09  7.36233e-09 ) ergs/cm2
 
Band function
Time interval is from   44.152 sec. to   45.152 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -8.55010   ( 3.28998   5.96433 )
beta        : -4.07278    ( -2.26558   1.32954 )
Epeak [keV] : 430.306      ( -430.306 -430.306 )
Norm@50keV   : 6.11404E-02    ( -0.0611848   0.136436 )
------------------------------------------------------------
# Chi-Squared =          64.31 using 59 PHA bins.
# Reduced chi-squared =          1.169 for     55 degrees of freedom 
# Null hypothesis probability =   1.827676e-01
 
Photon flux (15-150 keV)    in 1 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 
Plot creation:
Thu Dec 31 20:30:32 EST 2009