batgrbproduct Analysis for Trigger=350311

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.45
    Process Start Time (local time): Tue Aug 11 01:48:58 EDT 2009
             Host Name: gcn14
   Current Working Dir: /net/raid16/BAT_GRB_process_2009/350311
======================================================================

  Trigger: 00350311      Segment: 000

  BAT Trigger Time: 262275134.016   [s; MET]
      Trigger Stop: 262275135.04   [s; MET]
               UTC: 2009-04-24T14:12:09.330200    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 189.537885215137   Dec: 16.8295481175842  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    23.3
     Image Trigger?:     NO
     Rate S/N Ratio:     255.998046867549  [ if not an image trigger ]
     Image S/N Ratio:    23.3

  Flight Position:   [ source = BAT ]
    RA: 189.537885215137   Dec: 16.8295481175842  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 189.530617829755   Dec: 16.8293315546786  [deg; J2000]  
        { 12h 38m 07.3s , +16d 49' 45.6" }
         +/- 0.837205618931088 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.320148458979512 [arcmin] (formal 1-sigma fit error)
    SNR: 39.20651026792
 
  Angular difference between Flight and Ground position is 0.417570 arcmin
 
  Partial Coding Fraction: 0.1289062    [ including projection effects ]

  Duration
     T90: 49.4680000245571 +/- 2.27250697020751
        Measured from: -0.124000012874603
                   to: 49.3440000116825     [s; relative to TRIGTIME]
     T50: 3.36800000071526 +/- 0.048166349704769
        Measured from: 0.680000007152557
                   to: 4.04800000786781     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.0960000157356262     
                   to: 0.903999984264374     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.740000009536743     
                   to: 102.520000010729     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     8.179369  12.345452   9.925799   2.598847
           0.131064   0.152744   0.143756   0.104011 [error]
 Peak      1.757820   2.871438   2.812179   0.879762
           0.048934   0.062862   0.064888   0.041465 [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 3.14e-06 5.61e-06 7.71e-06 2.19e-05 2.22e-05 3.84e-05   erg/cm2
              Error 1.20e-07 1.26e-07 1.61e-07 1.06e-06 4.09e-07 1.13e-06   erg/cm2
Peak flux Power-law 1.92e+01 2.23e+01 1.87e+01 2.64e+01 6.97e+01 8.66e+01   ph/cm2/s
              Error 6.99e-01 5.22e-01 5.03e-01 1.41e+00 1.53e+00 2.07e+00   ph/cm2/s
 
Fluence   Cutoff-PL 2.88e-06 5.68e-06 7.95e-06 1.57e-05 2.19e-05 3.22e-05   erg/cm2
              Error 1.61e-07 1.32e-07 1.95e-07 2.37e-06 4.38e-07 2.39e-06   erg/cm2
Peak flux Cutoff-PL 1.81e+01 2.32e+01 1.95e+01 1.81e+01 6.95e+01 7.90e+01   ph/cm2/s
              Error 8.12e-01 6.36e-01 6.03e-01 2.65e+00 1.53e+00 2.90e+00   ph/cm2/s
 
Fluence        Band 2.82e-06 5.60e-06 7.91e-06 1.59e-05 2.18e-05 3.05e-05   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 1.79e+01 2.36e+01 1.92e+01 2.20e+01 6.94e+01 8.28e+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    1.543    0.034    -      -           2.28e-02 4.17e-04   57.440 57
CPL   1.244    0.140     147.8   51.3      3.07e-02 4.18e-03   43.350 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    1.257    0.035    -      -           5.89e-01 1.31e-02   74.700 57
CPL   0.915    0.137     166.0   52.6      8.74e-01 1.36e-01   55.150 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: 8.192000 sec.
T50 in the 50-300 keV band: 3.008000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  103.260   -0.740  102.520
T90    49.468   -0.124   49.344
T50     3.368    0.680    4.048
Peak    1.000   -0.096    0.904

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  189.5306 +16.8293 0.0049   38.8   56.3      30.7355    39.2  TRIG_00350311       
------------------------------------------
 
Foreground time interval of the image:
 -0.740  15.685 (delta_t =  16.425 [sec])
Background time interval of the image:
-239.016  -0.740 (delta_t = 238.276 [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   -0.740 sec. to  102.520 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.54318     ( -0.033941   0.0339261 )
Norm@50keV  : 2.28398E-02    ( -0.000417202   0.000417104 )
------------------------------------------------------------
# Chi-Squared =          57.44 using 59 PHA bins.
# Reduced chi-squared =          1.008 for     57 degrees of freedom 
# Null hypothesis probability =   4.587913e-01
 
Photon flux (15-150 keV)    in 103.3 sec: 2.88571 ( -0.0621978  0.0624203 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.22331e-05 ( -4.09062e-07  4.09175e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.740 sec. to  102.520 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.24377     ( -0.142236   0.138069 )
Epeak [keV] : 147.815      ( -29.2102 73.3644 )
Norm@50keV  : 3.07314E-02    ( -0.00384124   0.00452077 )
------------------------------------------------------------
# Chi-Squared =          43.35 using 59 PHA bins.
# Reduced chi-squared =         0.7742 for     56 degrees of freedom 
# Null hypothesis probability =   8.915311e-01
 
Photon flux (15-150 keV)    in 103.3 sec: 2.81236 ( -0.06917  0.06963 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.19109e-05 ( -4.38199e-07  4.37372e-07 ) ergs/cm2
 
Band function
Time interval is from   -0.740 sec. to  102.520 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.24376   ( -0.0558038   0.171049 )
beta        : -10.00000    ( 4.40339e+13   4.40339e+13 )
Epeak [keV] : 147.789      ( -29.2053 73.3517 )
Norm@50keV   : 3.07278E-02    ( -0.00384169   0.00452153 )
------------------------------------------------------------
# Chi-Squared =          43.35 using 59 PHA bins.
# Reduced chi-squared =         0.7882 for     55 degrees of freedom 
# Null hypothesis probability =   8.719016e-01
 
Photon flux (15-150 keV)    in 103.3 sec: 2.78966 ( -0.0684  0.06883 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.1805e-05 ( -4.36752e-07  4.34996e-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   -0.096 sec. to    0.904 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.25695     ( -0.0347157   0.0347993 )
Norm@50keV  : 0.588959    ( -0.0130679   0.0130591 )
------------------------------------------------------------
# Chi-Squared =          74.70 using 59 PHA bins.
# Reduced chi-squared =          1.310 for     57 degrees of freedom 
# Null hypothesis probability =   5.789637e-02
 
Photon flux (15-150 keV)    in 1 sec: 69.7372 ( -1.52564  1.52572 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.88356e-06 ( -1.49554e-07  1.49743e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.096 sec. to    0.904 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.915138     ( -0.13937   0.13519 )
Epeak [keV] : 165.999      ( -33.3869 71.8538 )
Norm@50keV  : 0.874007    ( -0.123144   0.147981 )
------------------------------------------------------------
# Chi-Squared =          55.15 using 59 PHA bins.
# Reduced chi-squared =         0.9849 for     56 degrees of freedom 
# Null hypothesis probability =   5.068857e-01
 
Photon flux (15-150 keV)    in 1 sec: 69.4588 ( -1.5313  1.5312 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.80456e-06 ( 0  0 ) ergs/cm2
 
Band function
Time interval is from   -0.096 sec. to    0.904 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.748449   ( -0.263592   0.891253 )
beta        : -1.48076    ( 1.48076   0.134708 )
Epeak [keV] : 113.345      ( -65.0753 96.3697 )
Norm@50keV   : 1.10600    ( -0.321369   2.98239 )
------------------------------------------------------------
# Chi-Squared =          53.85 using 59 PHA bins.
# Reduced chi-squared =         0.9792 for     55 degrees of freedom 
# Null hypothesis probability =   5.184874e-01
 
Photon flux (15-150 keV)    in 1 sec: 69.3535 ( -1.5335  1.534 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.80041e-06 ( -1.55616e-07  1.55203e-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     
Plot creation:
Fri May 27 11:40:25 EDT 2011