batgrbproduct Analysis for Trigger=318170

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.45
    Process Start Time (local time): Thu Aug  6 06:35:52 EDT 2009
             Host Name: gcn14
   Current Working Dir: /net/raid16/BAT_GRB_process_2009/318170
======================================================================

  Trigger: 00318170      Segment: 000

  BAT Trigger Time: 238892858.368   [s; MET]
      Trigger Stop: 238892859.392   [s; MET]
               UTC: 2008-07-27T23:07:35.394100    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 32.6448768441636   Dec: 64.1515714708512  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.95
     Image Trigger?:     NO
     Rate S/N Ratio:     13.3416640641263  [ if not an image trigger ]
     Image S/N Ratio:    7.95

  Flight Position:   [ source = BAT ]
    RA: 32.6448768441636   Dec: 64.1515714708512  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 32.6400755431858   Dec: 64.1300500698541  [deg; J2000]  
        { 02h 10m 33.6s , +64d 07' 48.2" }
         +/- 0.769510148679465 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.293860448400933 [arcmin] (formal 1-sigma fit error)
    SNR: 44.2251491094343
 
  Angular difference between Flight and Ground position is 1.297383 arcmin
 
  Partial Coding Fraction: 0.7734375    [ including projection effects ]

  Duration
     T90: 77.6079999804497 +/- 7.26474443526915
        Measured from: 1.66800001263618
                   to: 79.2759999930859     [s; relative to TRIGTIME]
     T50: 23.3160000145435 +/- 1.43720841455207
        Measured from: 14.9799999892712
                   to: 38.2960000038147     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 15.2319999933243     
                   to: 16.2319999933243     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -3.31600001454353     
                   to: 110.227999985218     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.650624   2.958226   2.613055   0.605318
           0.057140   0.061595   0.056964   0.050429 [error]
 Peak      0.057938   0.103691   0.110149   0.022878
           0.006335   0.007377   0.007079   0.005600 [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 5.38e-07 1.17e-06 2.00e-06 7.89e-06 5.48e-06 1.16e-05   erg/cm2
              Error 2.86e-08 3.61e-08 5.88e-08 5.45e-07 1.49e-07 5.72e-07   erg/cm2
Peak flux Power-law 5.31e-01 7.02e-01 6.81e-01 1.18e+00 2.30e+00 3.09e+00   ph/cm2/s
              Error 7.08e-02 5.82e-02 5.44e-02 1.96e-01 1.65e-01 2.46e-01   ph/cm2/s
 
Fluence   Cutoff-PL 4.90e-07 1.19e-06 2.07e-06 4.93e-06 5.36e-06 8.68e-06   erg/cm2
              Error 3.65e-08 3.91e-08 6.82e-08 1.16e-06 1.64e-07 1.15e-06   erg/cm2
Peak flux Cutoff-PL 4.47e-01 7.44e-01 7.41e-01 5.65e-01 2.25e+00 2.50e+00   ph/cm2/s
              Error 8.65e-02 6.78e-02 6.77e-02 2.55e-01 1.69e-01 2.99e-01   ph/cm2/s
 
Fluence        Band 4.79e-07 1.17e-06 2.04e-06 4.92e-06 5.30e-06 8.63e-06   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 4.47e-01 7.44e-01 7.41e-01 5.66e-01 2.25e+00 2.50e+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    1.226    0.047    -      -           4.80e-03 1.22e-04   68.730 57
CPL   0.861    0.194     175.9   82.0      6.98e-03 1.36e-03   57.430 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.045    0.117    -      -           1.99e-02 1.41e-03   79.660 57
CPL   0.269    0.523     122.0   69.5      4.61e-02 2.71e-02   71.850 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: 63.104000 sec.
T50 in the 50-300 keV band: 20.608000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  113.544   -3.316  110.228
T90    77.608    1.668   79.276
T50    23.316   14.980   38.296
Peak    1.000   15.232   16.232

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
   32.6401 +64.1301 0.0044   20.2  -64.6       2.7704    44.2  TRIG_00318170       
------------------------------------------
 
Foreground time interval of the image:
 -3.316  18.533 (delta_t =  21.849 [sec])
Background time interval of the image:
-239.368  -3.316 (delta_t = 236.052 [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   -3.316 sec. to  110.228 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.22559     ( -0.0473478   0.0471505 )
Norm@50keV  : 4.79549E-03    ( -0.000121992   0.000121954 )
------------------------------------------------------------
# Chi-Squared =          68.73 using 59 PHA bins.
# Reduced chi-squared =          1.206 for     57 degrees of freedom 
# Null hypothesis probability =   1.372669e-01
 
Photon flux (15-150 keV)    in 113.5 sec: 0.565004 ( -0.0153358  0.0153656 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.48296e-06 ( -1.49127e-07  1.49378e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -3.316 sec. to  110.228 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.860813     ( -0.19796   0.189151 )
Epeak [keV] : 175.883      ( -42.2932 121.7 )
Norm@50keV  : 6.98066E-03    ( -0.00120372   0.00152432 )
------------------------------------------------------------
# Chi-Squared =          57.43 using 59 PHA bins.
# Reduced chi-squared =          1.026 for     56 degrees of freedom 
# Null hypothesis probability =   4.217913e-01
 
Photon flux (15-150 keV)    in 113.5 sec: 0.551920 ( -0.016602  0.016635 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.35739e-06 ( -1.64927e-07  1.64008e-07 ) ergs/cm2
 
Band function
Time interval is from   -3.316 sec. to  110.228 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 1.24009   ( -1.80169   -1.24141 )
beta        : -1.31684    ( -0.0986877   0.0676317 )
Epeak [keV] : 41.1953      ( -9.12747 53.1914 )
Norm@50keV   : 0.191987    ( -0.193654   54.8885 )
------------------------------------------------------------
# Chi-Squared =          53.18 using 59 PHA bins.
# Reduced chi-squared =         0.9669 for     55 degrees of freedom 
# Null hypothesis probability =   5.445874e-01
 
Photon flux (15-150 keV)    in 113.5 sec: 0.540884 ( -0.01598  0.016979 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.29995e-06 ( -1.65631e-07  1.62464e-07 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 19.4550  (  )
R^2/D10^2   : 2.76798E-02  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared =         284.52 using 59 PHA bins.
# Reduced chi-squared =         4.9915 for     57 degrees of freedom 
# Null hypothesis probability =   5.770844e-32
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.317e-07   1.243e-08
25- 50  1.133e-06   4.285e-08
50-150  3.165e-06   1.379e-07
15-150  4.530e-06   1.430e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.361       (      )
Norm        : 2.39116       (     )
------------------------------------------------------------
# Chi-Squared =         202.14 using 59 PHA bins.
# Reduced chi-squared =         3.5463 for     57 degrees of freedom 
# Null hypothesis probability =   4.073123e-18
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.758e-07   3.439e-07
25- 50  1.300e-06   6.577e-07
50-150  2.851e-06   1.452e-06
15-150  4.827e-06   2.456e-06
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.48285        (-0.878243      0.966279)
R1^2/D10^2  : 0.244893        (-0.0675053      0.100082)
kT2 [keV]   : 31.5903        (-3.01771      4.14954)
R2^2/D10^2  : 4.64827E-03    (-0.00157479   0.00193178)
------------------------------------------------------------
# Chi-Squared =          51.06 using 59 PHA bins.
# Reduced chi-squared =         0.9284 for     55 degrees of freedom 
# Null hypothesis probability =   6.258173e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.562e-07   4.438e-08
25- 50  1.230e-06   8.178e-08
50-150  3.694e-06   2.815e-07
15-150  5.380e-06   3.876e-07

Peak spectrum fit

Power-law model
Time interval is from   15.232 sec. to   16.232 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.04454     ( -0.117394   0.115983 )
Norm@50keV  : 1.99417E-02    ( -0.00141133   0.00141118 )
------------------------------------------------------------
# Chi-Squared =          79.66 using 59 PHA bins.
# Reduced chi-squared =          1.398 for     57 degrees of freedom 
# Null hypothesis probability =   2.541294e-02
 
Photon flux (15-150 keV)    in 1 sec: 2.30228 ( -0.164678  0.164838 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.12332e-07 ( -1.68757e-08  1.69822e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   15.232 sec. to   16.232 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.268925     ( -0.55652   0.489897 )
Epeak [keV] : 121.996      ( -29.8791 109.188 )
Norm@50keV  : 4.60922E-02    ( -0.0185219   0.0356579 )
------------------------------------------------------------
# Chi-Squared =          71.85 using 59 PHA bins.
# Reduced chi-squared =          1.283 for     56 degrees of freedom 
# Null hypothesis probability =   7.528568e-02
 
Photon flux (15-150 keV)    in 1 sec: 2.24620 ( -0.16931  0.16901 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.03589e-07 ( -1.815e-08  1.8138e-08 ) ergs/cm2
 
Band function
Time interval is from   15.232 sec. to   16.232 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.268865   ( -0.46664   0.554935 )
beta        : -10.00000    ( 4.54761e+10   4.54761e+10 )
Epeak [keV] : 121.977      ( -29.8764 109.18 )
Norm@50keV   : 4.60959E-02    ( -0.018527   0.0356769 )
------------------------------------------------------------
# Chi-Squared =          71.85 using 59 PHA bins.
# Reduced chi-squared =          1.306 for     55 degrees of freedom 
# Null hypothesis probability =   6.315563e-02
 
Photon flux (15-150 keV)    in 1 sec: 2.24629 ( -0.1694  0.16893 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.03493e-07 ( -1.8114e-08  1.8094e-08 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 20.2200  (-1.73746  1.95881)
R^2/D10^2   : 0.109407  (-0.0279899   0.0365379)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared =          90.25 using 59 PHA bins.
# Reduced chi-squared =          1.583 for     57 degrees of freedom 
# Null hypothesis probability =   3.300246e-03
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.585e-09   1.096e-09
25- 50  4.307e-08   4.650e-09
50-150  1.307e-07   1.655e-08
15-150  1.824e-07   1.710e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (      )
Norm        : 9.14357       (     )
------------------------------------------------------------
# Chi-Squared =         123.68 using 59 PHA bins.
# Reduced chi-squared =         2.1698 for     57 degrees of freedom 
# Null hypothesis probability =   7.784184e-07
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.277e-08   1.196e-08
25- 50  4.380e-08   2.314e-08
50-150  9.606e-08   5.090e-08
15-150  1.626e-07   8.665e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.33804        (-2.41778      3.81453)
R1^2/D10^2  : 1.09810        (-0.739416      2.87488)
kT2 [keV]   : 26.5967        (-4.1978      9.33103)
R2^2/D10^2  : 3.97034E-02    (-0.0262937   0.032794)
------------------------------------------------------------
# Chi-Squared =          70.86 using 59 PHA bins.
# Reduced chi-squared =          1.288 for     55 degrees of freedom 
# Null hypothesis probability =   7.359507e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.467e-08   6.456e-09
25- 50  4.249e-08   1.357e-08
50-150  1.460e-07   4.512e-08
15-150  2.031e-07   5.640e-08
Plot creation:
Thu Jul 28 14:20:05 EDT 2011