batgrbproduct Analysis for Trigger=361471

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.45
    Process Start Time (local time): Tue Sep  1 10:27:14 EDT 2009
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger361471/GCN5_download_cron
======================================================================

  Trigger: 00361471      Segment: 000

  BAT Trigger Time: 273431849.984   [s; MET]
      Trigger Stop: 273431850.496   [s; MET]
               UTC: 2009-08-31T17:17:24.938400    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 261.988195476803   Dec: -26.5829758544835  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    6.16
     Image Trigger?:     NO
     Rate S/N Ratio:     49.4165964024233  [ if not an image trigger ]
     Image S/N Ratio:    6.16

  Flight Position:   [ source = BAT ]
    RA: 261.988195476803   Dec: -26.5829758544835  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 261.986865309478   Dec: -26.5547540413789  [deg; J2000]  
        { 17h 27m 56.8s , -26d 33' 17.1" }
         +/- 3.88190788839876 [arcmin] (estimated 90% radius based on SNR)
         +/- 2.34091392001135 [arcmin] (formal 1-sigma fit error)
    SNR: 4.38152405061733
 
  Angular difference between Flight and Ground position is 1.694813 arcmin
 
  Partial Coding Fraction: 0.96875    [ including projection effects ]

  Duration
     T90: 0.51199996471405 +/- 
        Measured from: 0
                   to: 0.51199996471405     [s; relative to TRIGTIME]
     T50: 0.51199996471405 +/- 
        Measured from: 0
                   to: 0.51199996471405     [s; relative to TRIGTIME]

    WARNING: battblocks failed.  Used TDRSS fore/background intervals

  Fluence
     Peak Flux  (peak 0.51199996471405 second)
        Measured from: 0     
                   to: 0.51199996471405     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0     
                   to: 0.51199996471405     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.008367   0.019426  -0.000815  -0.000358
           0.004467   0.004108   0.003577   0.003000 [error]
 Peak      0.008367   0.019426  -0.000815  -0.000358
           0.004467   0.004108   0.003577   0.003000 [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 3.89e-09 4.66e-09 4.00e-09 5.83e-09 1.46e-08 1.89e-08   erg/cm2
              Error 1.77e-09 1.85e-09 2.55e-09 7.96e-09 6.50e-09 1.11e-08   erg/cm2
Peak flux Power-law 2.50e-01 1.65e-01 7.09e-02 4.16e-02 5.08e-01 5.30e-01   ph/cm2/s
              Error 1.15e-01 6.47e-02 4.39e-02 4.78e-02 1.94e-01 2.04e-01   ph/cm2/s
 
Fluence   Cutoff-PL 4.31e-09 7.03e-09 1.21e-09 5.18e-12 1.25e-08 1.25e-08   erg/cm2
              Error 1.80e-09 2.53e-09 1.61e-09 7.56e-11 4.16e-09 4.17e-09   erg/cm2
Peak flux Cutoff-PL 2.68e-01 2.54e-01 2.47e-02 5.61e-05 5.45e-01 5.43e-01   ph/cm2/s
              Error 1.13e-01 8.77e-02 2.75e-02 8.16e-04 1.73e-01 1.74e-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    2.218    0.631    -      -           3.05e-03 1.50e-03   70.340 57
CPL  -4.899    0.000      29.7    5.0      2.42e+02 1.93e+02   59.910 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.218    0.631    -      -           3.05e-03 1.50e-03   70.340 57
CPL  -4.899    0.000      29.7    5.0      2.42e+02 1.93e+02   59.910 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    0.512    0.000    0.512
T90     0.512    0.000    0.512
T50     0.512    0.000    0.512
Peak    0.512    0.000    0.512

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  261.9869 -26.5548 0.0439   20.5 -176.5       0.0329     4.4  TRIG_00361471       
------------------------------------------
 
Foreground time interval of the image:
  0.000   0.512 (delta_t =   0.512 [sec])
Background time interval of the image:
-22.883  -1.984 (delta_t =  20.899 [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    0.000 sec. to    0.512 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.21773     ( -0.582802   0.6784 )
Norm@50keV  : 3.04918E-03    ( -0.00148034   0.00152776 )
------------------------------------------------------------
# Chi-Squared =          70.34 using 59 PHA bins.
# Reduced chi-squared =          1.234 for     57 degrees of freedom 
# Null hypothesis probability =   1.103699e-01
 
Photon flux (15-150 keV)    in 0.512 sec: 0.507502 ( -0.193797  0.193803 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.46337e-08 ( -6.15537e-09  6.8415e-09 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to    0.512 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -4.89868     (     )
Epeak [keV] : 29.6756      ( -4.54524 5.37081 )
Norm@50keV  : 242.030    ( -242.039   143.585 )
------------------------------------------------------------
# Chi-Squared =          59.91 using 59 PHA bins.
# Reduced chi-squared =          1.070 for     56 degrees of freedom 
# Null hypothesis probability =   3.357252e-01
 
Photon flux (15-150 keV)    in 0.512 sec: 0.544625 ( -0.173276  0.17281 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.2544e-08 ( -4.05842e-09  4.25559e-09 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to    0.512 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.98533   ( -142.164   -132.164 )
beta        : -7.66932    ( 6.11248   15.7051 )
Epeak [keV] : 29.6081      ( -4.62287 5.3667 )
Norm@50keV   : 281.547    ( -281.552   244.85 )
------------------------------------------------------------
# Chi-Squared =          59.83 using 59 PHA bins.
# Reduced chi-squared =          1.088 for     55 degrees of freedom 
# Null hypothesis probability =   3.047639e-01
 
Photon flux (15-150 keV)    in 0.512 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    0.000 sec. to    0.512 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.21773     ( -0.582802   0.6784 )
Norm@50keV  : 3.04918E-03    ( -0.00148034   0.00152776 )
------------------------------------------------------------
# Chi-Squared =          70.34 using 59 PHA bins.
# Reduced chi-squared =          1.234 for     57 degrees of freedom 
# Null hypothesis probability =   1.103699e-01
 
Photon flux (15-150 keV)    in 0.512 sec: 0.507502 ( -0.193797  0.193803 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.46337e-08 ( -6.15537e-09  6.8415e-09 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to    0.512 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -4.89868     (     )
Epeak [keV] : 29.6756      ( -4.54524 5.37081 )
Norm@50keV  : 242.030    ( -242.039   143.585 )
------------------------------------------------------------
# Chi-Squared =          59.91 using 59 PHA bins.
# Reduced chi-squared =          1.070 for     56 degrees of freedom 
# Null hypothesis probability =   3.357252e-01
 
Photon flux (15-150 keV)    in 0.512 sec: 0.544625 ( -0.173276  0.17281 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.2544e-08 ( -4.05842e-09  4.25559e-09 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to    0.512 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.98533   ( -142.164   -132.164 )
beta        : -7.66932    ( 6.11248   15.7051 )
Epeak [keV] : 29.6081      ( -4.62287 5.3667 )
Norm@50keV   : 281.547    ( -281.552   244.85 )
------------------------------------------------------------
# Chi-Squared =          59.83 using 59 PHA bins.
# Reduced chi-squared =          1.088 for     55 degrees of freedom 
# Null hypothesis probability =   3.047639e-01
 
Photon flux (15-150 keV)    in 0.512 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 
Plot creation:
Tue Sep  1 10:36:55 EDT 2009