batgrbproduct Analysis for Trigger=361489

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.45
    Process Start Time (local time): Tue Dec 22 16:19:04 EST 2009
             Host Name: heteswift
   Current Working Dir: /net/raid16/BAT_GRB_process_2009/361489
======================================================================

  Trigger: 00361489      Segment: 000

  BAT Trigger Time: 273447030.976   [s; MET]
      Trigger Stop: 273447036.48   [s; MET]
               UTC: 2009-08-31T21:30:25.929900    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 108.278334509616   Dec: -25.1000128821772  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.36
     Image Trigger?:     NO
     Rate S/N Ratio:     10  [ if not an image trigger ]
     Image S/N Ratio:    8.36

  Flight Position:   [ source = BAT ]
    RA: 108.278334509616   Dec: -25.1000128821772  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 108.329754041423   Dec: -25.155878700815  [deg; J2000]  
        { 07h 13m 19.1s , -25d 09' 21.2" }
         +/- 3.10447897369979 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.3378507120682 [arcmin] (formal 1-sigma fit error)
    SNR: 6.02944513253123
 
  Angular difference between Flight and Ground position is 4.363200 arcmin
 
  Partial Coding Fraction: 0.84375    [ including projection effects ]

  Duration
     T90: 77.9520000219345 +/- 14.7999221917989
        Measured from: 1.11199998855591
                   to: 79.0640000104904     [s; relative to TRIGTIME]
     T50: 53.3120000362396 +/- 27.6332553094131
        Measured from: 3.28799998760223
                   to: 56.6000000238419     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 1.92399996519089     
                   to: 2.92399996519089     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0.407999992370605     
                   to: 81.1759999990463     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.178726   0.187652   0.151548   0.083633
           0.050343   0.051848   0.045372   0.039819 [error]
 Peak      0.014465   0.025402   0.018226   0.008719
           0.005729   0.005768   0.005302   0.004438 [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 4.19e-08 8.60e-08 1.38e-07 4.94e-07 3.82e-07 7.60e-07   erg/cm2
              Error 2.04e-08 2.47e-08 4.61e-08 3.98e-07 1.13e-07 4.25e-07   erg/cm2
Peak flux Power-law 1.43e-01 1.73e-01 1.52e-01 2.29e-01 5.48e-01 6.97e-01   ph/cm2/s
              Error 7.12e-02 5.19e-02 4.39e-02 1.51e-01 1.40e-01 1.85e-01   ph/cm2/s
 
Fluence   Cutoff-PL 4.20e-08 8.62e-08 1.38e-07 4.88e-07 3.82e-07 7.52e-07   erg/cm2
              Error 2.00e-08 2.18e-08 3.46e-08 1.13e-07 4.80e-07 0.00e+00   erg/cm2
Peak flux Cutoff-PL 1.43e-01 1.73e-01 1.52e-01 2.27e-01 5.48e-01 6.96e-01   ph/cm2/s
              Error 7.12e-02 3.89e-02 4.39e-02 1.50e-01 1.39e-01 1.57e-01   ph/cm2/s
 
Fluence        Band 4.14e-08 8.61e-08 1.37e-07 4.80e-07 3.80e-07 7.37e-07   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 1.38e-01 1.80e-01 1.51e-01 2.16e-01 5.49e-01 6.84e-01   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    1.319    0.506    -      -           4.81e-04 1.25e-04   59.370 57
CPL   1.337    0.510    9999.4    0.0      4.79e-04 6.50e-04   59.390 56
 
The chi2 of BB fit is  which shows a significant improvement in the fit over a PL.
Check the BB fit.
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.188    0.472    -      -           4.68e-03 1.15e-03   39.770 57
CPL   2.767    0.000     227.7    0.0      5.66e-04 0.00e+00   39.600 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   80.768    0.408   81.176
T90    77.952    1.112   79.064
T50    53.312    3.288   56.600
Peak    1.000    1.924    2.924

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  108.3298 -25.1559 0.0317   23.4  -39.3       0.5490     6.0  TRIG_00361489       
------------------------------------------
 
Foreground time interval of the image:
  0.408  54.525 (delta_t =  54.117 [sec])
Background time interval of the image:
-239.976   0.408 (delta_t = 240.384 [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    0.408 sec. to   81.176 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.31856     ( -0.518068   0.494773 )
Norm@50keV  : 4.81227E-04    ( -0.000125247   0.000124187 )
------------------------------------------------------------
# Chi-Squared =          59.37 using 59 PHA bins.
# Reduced chi-squared =          1.042 for     57 degrees of freedom 
# Null hypothesis probability =   3.890988e-01
 
Photon flux (15-150 keV)    in 80.77 sec: 5.76124E-02 ( -0.0151449  0.0151759 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.82386e-07 ( -1.11653e-07  1.14491e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.408 sec. to   81.176 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.33712     ( -0.53933   0.481077 )
Epeak [keV] : 9999.36      ( -9999.72 -9999.72 )
Norm@50keV  : 4.78960E-04    ( -0.000124478   0.00117518 )
------------------------------------------------------------
# Chi-Squared =          59.39 using 59 PHA bins.
# Reduced chi-squared =          1.061 for     56 degrees of freedom 
# Null hypothesis probability =   3.532062e-01
 
Photon flux (15-150 keV)    in 80.77 sec: 5.74511E-02 ( -0.015011  0.0152795 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.81855e-07 ( -1.11105e-07  1.14504e-07 ) ergs/cm2
 
Band function
Time interval is from    0.408 sec. to   81.176 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.95191   ( -41.7035   -41.7035 )
beta        : -1.38516    ( -0.621954   0.565236 )
Epeak [keV] : 24.1162      ( -24.1136 109.646 )
Norm@50keV   : 50.2267    ( -50.4129   65.677 )
------------------------------------------------------------
# Chi-Squared =          59.28 using 59 PHA bins.
# Reduced chi-squared =          1.078 for     55 degrees of freedom 
# Null hypothesis probability =   3.221770e-01
 
Photon flux (15-150 keV)    in 80.77 sec: 5.730400E-02 ( -0.014922  0.014795 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.80048e-07 ( -5.33728e-08  1.09027e-07 ) ergs/cm2
 
Single BB
 
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    :   (  )
R^2/D10^2   :   (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25     
25- 50     
50-150     
15-150     
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    :        (      )
Norm        :        (     )
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25     
25- 50     
50-150     
15-150     
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   :         (      )
R1^2/D10^2  :         (      )
kT2 [keV]   :         (      )
R2^2/D10^2  :     (   )
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25     
25- 50     
50-150     
15-150     

Peak spectrum fit

Power-law model
Time interval is from    1.924 sec. to    2.924 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.18780     ( -0.489848   0.455046 )
Norm@50keV  : 4.67875E-03    ( -0.00115271   0.00115399 )
------------------------------------------------------------
# Chi-Squared =          39.77 using 59 PHA bins.
# Reduced chi-squared =         0.6978 for     57 degrees of freedom 
# Null hypothesis probability =   9.598052e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.548259 ( -0.1399  0.140331 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.7632e-08 ( -1.30278e-08  1.32466e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    1.924 sec. to    2.924 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.76698     (     )
Epeak [keV] : 227.727      (   )
Norm@50keV  : 5.66355E-04    (     )
------------------------------------------------------------
# Chi-Squared =          39.60 using 59 PHA bins.
# Reduced chi-squared =         0.7072 for     56 degrees of freedom 
# Null hypothesis probability =   9.524000e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.548059 ( -0.138683  0.140281 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.75043e-08 ( -1.28677e-08  1.33718e-08 ) ergs/cm2
 
Band function
Time interval is from    1.924 sec. to    2.924 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.87305   ( -17.0217   -17.0217 )
beta        : -1.25202    ( -0.543052   0.520749 )
Epeak [keV] : 23.9073      ( -23.9076 52.3147 )
Norm@50keV   : 403.914    ( -403.376   357.299 )
------------------------------------------------------------
# Chi-Squared =          39.42 using 59 PHA bins.
# Reduced chi-squared =         0.7167 for     55 degrees of freedom 
# Null hypothesis probability =   9.440726e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.548698 ( -0.14393  0.138255 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.83615e-08 ( -1.27499e-08  1.19908e-08 ) ergs/cm2
 
Single BB
 
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    :   (  )
R^2/D10^2   :   (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25     
25- 50     
50-150     
15-150     
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    :        (      )
Norm        :        (     )
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25     
25- 50     
50-150     
15-150     
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   :         (      )
R1^2/D10^2  :         (      )
kT2 [keV]   :         (      )
R2^2/D10^2  :     (   )
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25     
25- 50     
50-150     
15-150     
Plot creation:
Fri May 27 10:53:30 EDT 2011