batgrbproduct Analysis for Trigger=508161

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Tue Nov 22 06:22:11 EST 2011
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger508161/GCN5_download_cron
======================================================================

  Trigger: 00508161      Segment: 000

  BAT Trigger Time: 343585592.232   [s; MET]
      Trigger Stop: 343585592.296   [s; MET]
               UTC: 2011-11-21T16:26:24.635300    [includes UTCF correction] 
       Where From?: (*SHORT BURST*) TDRSS scaled map message

  BAT 
    RA: 154.75137632177   Dec: -46.6373700839271  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    10.2
     Image Trigger?:     NO
     Rate S/N Ratio:     143.013985330107  [ if not an image trigger ]
     Image S/N Ratio:    10.2

  Flight Position:   [ source = BAT ]
    RA: 154.75137632177   Dec: -46.6373700839271  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 154.748323948744   Dec: -46.6698989542299  [deg; J2000]  
        { 10h 18m 59.6s , -46d 40' 11.6" }
         +/- 1.01685925880654 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.397575932045076 [arcmin] (formal 1-sigma fit error)
    SNR: 29.6992676945798
 
  Angular difference between Flight and Ground position is 1.955776 arcmin
 
  Partial Coding Fraction: 0.6484375    [ including projection effects ]

  Duration
     T90: 117.755999922752 +/- 21.4402925626757
        Measured from: -0.0239998698234558
                   to: 117.732000052929     [s; relative to TRIGTIME]
     T50: 50.851999938488 +/- 4.22512719223048
        Measured from: 0.556000113487244
                   to: 51.4080000519753     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.263999998569489     
                   to: 0.736000001430511     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.335999965667725     
                   to: 141.083999991417     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.035254   1.314994   0.956158   0.316143
           0.071322   0.072279   0.063831   0.056244 [error]
 Peak      0.146608   0.273383   0.355815   0.148912
           0.010256   0.012881   0.014336   0.013485 [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 3.53e-07 5.87e-07 7.41e-07 1.86e-06 2.20e-06 3.55e-06   erg/cm2
              Error 3.81e-08 3.76e-08 6.38e-08 3.48e-07 1.50e-07 3.95e-07   erg/cm2
Peak flux Power-law 1.51e+00 2.12e+00 2.19e+00 4.17e+00 7.14e+00 9.99e+00   ph/cm2/s
              Error 1.46e-01 1.23e-01 1.12e-01 4.67e-01 3.37e-01 5.37e-01   ph/cm2/s
 
Fluence   Cutoff-PL 3.54e-07 5.88e-07 7.41e-07 1.85e-06 2.20e-06 3.40e-06   erg/cm2
              Error 4.09e-08 3.76e-08 6.38e-08 3.43e-07 1.53e-07 6.33e-07   erg/cm2
Peak flux Cutoff-PL 1.37e+00 2.15e+00 2.29e+00 2.96e+00 7.04e+00 8.77e+00   ph/cm2/s
              Error 1.88e-01 1.32e-01 1.43e-01 9.49e-01 3.49e-01 1.01e+00   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    1.665    0.115    -      -           1.68e-03 1.08e-04   72.600 57
CPL   1.667    0.116    9999.4    0.0      1.68e-03 0.00e+00   72.600 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.949    0.082    -      -           6.21e-02 2.91e-03   39.580 57
CPL   0.599    0.336     233.8  843.3      8.85e-02 2.97e-02   36.180 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: 47.488000 sec.
T50 in the 50-300 keV band: 29.248000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  141.420   -0.336  141.084
T90   117.756   -0.024  117.732
T50    50.852    0.556   51.408
Peak    1.000   -0.264    0.736

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  154.7483 -46.6699 0.0065   38.6 -166.4       1.5507    29.7  TRIG_00508161       
------------------------------------------
 
Foreground time interval of the image:
 -0.336   8.969 (delta_t =   9.305 [sec])
Background time interval of the image:
-239.232  -0.336 (delta_t = 238.896 [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   -0.336 sec. to  141.084 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.66524     ( -0.114415   0.1157 )
Norm@50keV  : 1.67657E-03    ( -0.000107862   0.000107242 )
------------------------------------------------------------
# Chi-Squared =          72.60 using 59 PHA bins.
# Reduced chi-squared =          1.274 for     57 degrees of freedom 
# Null hypothesis probability =   7.978274e-02
 
Photon flux (15-150 keV)    in 141.4 sec: 0.220031 ( -0.0140978  0.0141435 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.20154e-06 ( -1.49569e-07  1.5043e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.336 sec. to  141.084 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.66651     ( -0.116879   0.114617 )
Epeak [keV] : 9999.36      (   )
Norm@50keV  : 1.67818E-03    (     )
------------------------------------------------------------
# Chi-Squared =          72.60 using 59 PHA bins.
# Reduced chi-squared =          1.296 for     56 degrees of freedom 
# Null hypothesis probability =   6.715977e-02
 
Photon flux (15-150 keV)    in 141.4 sec: 0.219961 ( -0.014091  0.014045 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.20016e-06 ( -1.4765e-07  1.58934e-07 ) ergs/cm2
 
Band function
Time interval is from   -0.336 sec. to  141.084 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.20713   ( 1.19808   1.19808 )
beta        : -1.67657    ( 1.67736   0.124829 )
Epeak [keV] : 44.3518      ( -44.9999 -44.9999 )
Norm@50keV   : 3.63268E-03    ( -0.00216783   0 )
------------------------------------------------------------
# Chi-Squared =          72.52 using 59 PHA bins.
# Reduced chi-squared =          1.318 for     55 degrees of freedom 
# Null hypothesis probability =   5.682454e-02
 
Photon flux (15-150 keV)    in 141.4 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 13.9165  (  )
R^2/D10^2   : 3.02216E-02  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared =         153.17 using 59 PHA bins.
# Reduced chi-squared =         2.6871 for     57 degrees of freedom 
# Null hypothesis probability =   9.633954e-11
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.749e-07   2.093e-08
25- 50  6.467e-07   5.345e-08
50-150  8.221e-07   1.061e-07
15-150  1.644e-06   1.251e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 156.785       (14.9315      -101.24)
Norm        : 0.896220       (-0.0653779     0.0720962)
------------------------------------------------------------
# Chi-Squared =          75.17 using 59 PHA bins.
# Reduced chi-squared =          1.319 for     57 degrees of freedom 
# Null hypothesis probability =   5.376070e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.242e-07   3.231e-08
25- 50  6.048e-07   4.171e-08
50-150  1.215e-06   1.573e-07
15-150  2.144e-06   1.782e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.40069        (-1.07949      1.22334)
R1^2/D10^2  : 0.359646        (-0.167051      0.366518)
kT2 [keV]   : 26.3526        (-4.54721      7.28337)
R2^2/D10^2  : 2.49068E-03    (-0.00140566   0.00246826)
------------------------------------------------------------
# Chi-Squared =          73.05 using 59 PHA bins.
# Reduced chi-squared =          1.328 for     55 degrees of freedom 
# Null hypothesis probability =   5.216870e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.433e-07   8.541e-08
25- 50  5.860e-07   1.100e-07
50-150  1.267e-06   3.439e-07
15-150  2.197e-06   4.129e-07

Peak spectrum fit

Power-law model
Time interval is from   -0.264 sec. to    0.736 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.948607     ( -0.0824735   0.0818028 )
Norm@50keV  : 6.21382E-02    ( -0.00291313   0.00290817 )
------------------------------------------------------------
# Chi-Squared =          39.58 using 59 PHA bins.
# Reduced chi-squared =         0.6943 for     57 degrees of freedom 
# Null hypothesis probability =   9.617973e-01
 
Photon flux (15-150 keV)    in 1 sec: 7.13876 ( -0.337068  0.33732 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.84598e-07 ( -3.55754e-08  3.56881e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.264 sec. to    0.736 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.598605     ( -0.351895   0.319631 )
Epeak [keV] : 233.840      ( -88.2442 1598.42 )
Norm@50keV  : 8.85081E-02    ( -0.0232807   0.0362106 )
------------------------------------------------------------
# Chi-Squared =          36.18 using 59 PHA bins.
# Reduced chi-squared =         0.6461 for     56 degrees of freedom 
# Null hypothesis probability =   9.816800e-01
 
Photon flux (15-150 keV)    in 1 sec: 7.04306 ( -0.34874  0.34842 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.74702e-07 ( -3.7549e-08  3.7355e-08 ) ergs/cm2
 
Band function
Time interval is from   -0.264 sec. to    0.736 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.99998   ( -89326.5   -89326.5 )
beta        : -0.981115    ( -0.102729   0.0966929 )
Epeak [keV] : 26.4819      ( -26.4453 5.61147 )
Norm@50keV   : 2856.71    ( -2881.56   7.04419e+06 )
------------------------------------------------------------
# Chi-Squared =          38.16 using 59 PHA bins.
# Reduced chi-squared =         0.6938 for     55 degrees of freedom 
# Null hypothesis probability =   9.592414e-01
 
Photon flux (15-150 keV)    in 1 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 22.7974  (-1.41168  1.54915)
R^2/D10^2   : 0.233955  (-0.0426828   0.0509906)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared =          93.19 using 59 PHA bins.
# Reduced chi-squared =          1.635 for     57 degrees of freedom 
# Null hypothesis probability =   1.762012e-03
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.213e-08   2.165e-09
25- 50  1.195e-07   9.000e-09
50-150  4.639e-07   3.585e-08
15-150  6.055e-07   3.790e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (      )
Norm        : 28.2019       (     )
------------------------------------------------------------
# Chi-Squared =         177.27 using 59 PHA bins.
# Reduced chi-squared =         3.1100 for     57 degrees of freedom 
# Null hypothesis probability =   2.918970e-14
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.022e-08   3.647e-08
25- 50  1.351e-07   7.005e-08
50-150  2.963e-07   1.531e-07
15-150  5.016e-07   2.598e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.91997        (-1.44187      1.92872)
R1^2/D10^2  : 4.38810        (-2.3754      5.71652)
kT2 [keV]   : 30.7747        (-3.47404      5.20945)
R2^2/D10^2  : 8.35652E-02    (-0.032954   0.03948)
------------------------------------------------------------
# Chi-Squared =          33.67 using 59 PHA bins.
# Reduced chi-squared =         0.6123 for     55 degrees of freedom 
# Null hypothesis probability =   9.896264e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.554e-08   1.253e-08
25- 50  1.206e-07   2.379e-08
50-150  5.100e-07   6.050e-08
15-150  6.762e-07   9.430e-08
Plot creation:
Tue Nov 22 06:43:26 EST 2011