batgrbproduct Analysis for Trigger=451191

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Tue May 17 15:11:44 EDT 2011
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger451191/SDC
======================================================================

  Trigger: 00451191      Segment: 000

  BAT Trigger Time: 324286408   [s; MET]
      Trigger Stop: 324286488   [s; MET]
               UTC: 2011-04-12T07:33:21.152460    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 133.491854211323   Dec: 13.5166846952985  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.83
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    8.83

  Flight Position:   [ source = BAT ]
    RA: 133.491854211323   Dec: 13.5166846952985  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 133.493029123167   Dec: 13.4895551662663  [deg; J2000]  
        { 08h 53m 58.3s , +13d 29' 22.4" }
         +/- 1.8905297382343 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.737664576977351 [arcmin] (formal 1-sigma fit error)
    SNR: 12.2461359193485
 
  Angular difference between Flight and Ground position is 1.629214 arcmin
 
  Partial Coding Fraction: 0.1894531    [ including projection effects ]

  Duration
     T90: 21.4679999351501 +/- 3.76777492179169
        Measured from: 14.5640000104904
                   to: 36.0319999456406     [s; relative to TRIGTIME]
     T50: 7.44799995422363 +/- 1.50066253535313
        Measured from: 18.1919999718666
                   to: 25.6399999260902     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 18.9879999756813     
                   to: 19.9879999756813     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 13.6399999856949     
                   to: 39.311999976635     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.788685   1.062274   0.724677   0.182242
           0.071930   0.072751   0.067547   0.062759 [error]
 Peak      0.069953   0.082280   0.101340   0.011454
           0.014691   0.016159   0.014714   0.012806 [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 2.54e-07 4.40e-07 5.81e-07 1.57e-06 1.70e-06 2.84e-06   erg/cm2
              Error 3.26e-08 3.58e-08 6.50e-08 3.63e-07 1.56e-07 4.20e-07   erg/cm2
Peak flux Power-law 6.06e-01 6.53e-01 5.00e-01 6.26e-01 2.00e+00 2.39e+00   ph/cm2/s
              Error 1.92e-01 1.33e-01 1.14e-01 2.86e-01 3.81e-01 4.62e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.31e-07 4.78e-07 5.91e-07 5.33e-07 1.59e-06 1.83e-06   erg/cm2
              Error 3.77e-08 4.74e-08 7.28e-08 4.77e-07 1.77e-07 5.06e-07   erg/cm2
Peak flux Cutoff-PL 4.93e-01 7.12e-01 5.55e-01 1.93e+00 2.02e+00 0.00e+00   ph/cm2/s
              Error 2.35e-01 1.60e-01 1.39e-01 3.92e-01 5.17e-01 0.00e+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 2.19e+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    1.598    0.138    -      -           7.08e-03 5.99e-04   50.120 57
CPL   0.860    0.630      71.9   51.7      1.75e-02 1.57e-02   45.240 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    1.385    0.305    -      -           1.64e-02 3.13e-03   89.990 57
CPL   0.359    1.400      83.9  -28.3      5.20e-02 1.45e-01   87.900 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: 13.632000 sec.
T50 in the 50-300 keV band: 5.760000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   25.672   13.640   39.312
T90    21.468   14.564   36.032
T50     7.448   18.192   25.640
Peak    1.000   18.988   19.988

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  133.4930 +13.4896 0.0157   35.6   74.7       2.9278    12.2  TRIG_00451191       
------------------------------------------
 
Foreground time interval of the image:
 13.640  39.312 (delta_t =  25.672 [sec])
Background time interval of the image:
 -1.699  13.640 (delta_t =  15.339 [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   13.640 sec. to   39.312 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.59819     ( -0.137143   0.139053 )
Norm@50keV  : 7.07623E-03    ( -0.000600948   0.000596573 )
------------------------------------------------------------
# Chi-Squared =          50.12 using 59 PHA bins.
# Reduced chi-squared =         0.8792 for     57 degrees of freedom 
# Null hypothesis probability =   7.289273e-01
 
Photon flux (15-150 keV)    in 25.67 sec: 0.908821 ( -0.073436  0.0734999 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.69915e-06 ( -1.54868e-07  1.56491e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   13.640 sec. to   39.312 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.860254     ( -0.680036   0.580639 )
Epeak [keV] : 71.8747      ( -16.1291 87.1856 )
Norm@50keV  : 1.75251E-02    ( -0.00878903   0.0225124 )
------------------------------------------------------------
# Chi-Squared =          45.24 using 59 PHA bins.
# Reduced chi-squared =         0.8078 for     56 degrees of freedom 
# Null hypothesis probability =   8.477183e-01
 
Photon flux (15-150 keV)    in 25.67 sec: 0.880558 ( -0.076795  0.07672 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.58822e-06 ( -1.75955e-07  1.78671e-07 ) ergs/cm2
 
Band function
Time interval is from   13.640 sec. to   39.312 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.69740   ( -18.2404   -8.25851 )
beta        : -1.78266    ( -0.190055   0.175969 )
Epeak [keV] : 27.3980      ( -4.94475 4.15856 )
Norm@50keV   : 290.723    ( -157.4   30.0013 )
------------------------------------------------------------
# Chi-Squared =          43.66 using 59 PHA bins.
# Reduced chi-squared =         0.7938 for     55 degrees of freedom 
# Null hypothesis probability =   8.646388e-01
 
Photon flux (15-150 keV)    in 25.67 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]    :   (  )
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   18.988 sec. to   19.988 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.38483     ( -0.304057   0.305682 )
Norm@50keV  : 1.64491E-02    ( -0.0031341   0.00312028 )
------------------------------------------------------------
# Chi-Squared =          89.99 using 59 PHA bins.
# Reduced chi-squared =          1.579 for     57 degrees of freedom 
# Null hypothesis probability =   3.486820e-03
 
Photon flux (15-150 keV)    in 1 sec: 1.99641 ( -0.38045  0.381189 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.5944e-07 ( -3.31456e-08  3.36433e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   18.988 sec. to   19.988 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.358544     ( -1.68002   1.12055 )
Epeak [keV] : 83.9213      ( -27.2998 -83.9231 )
Norm@50keV  : 5.19671E-02    ( -0.0519647   0.23733 )
------------------------------------------------------------
# Chi-Squared =          87.90 using 59 PHA bins.
# Reduced chi-squared =          1.570 for     56 degrees of freedom 
# Null hypothesis probability =   4.146037e-03
 
Photon flux (15-150 keV)    in 1 sec: 1.93138 ( -0.39361  0.39102 ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 
Band function
Time interval is from   18.988 sec. to   19.988 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.38482   ( 0.903362   2.45594 )
beta        : 10.00000    ( -1.97895e+15   -1.97895e+15 )
Epeak [keV] : 6.24030      ( -6.2403 -6.2403 )
Norm@50keV   : 6.69875E-19    ( -6.69875e-19   -6.69875e-19 )
------------------------------------------------------------
# Chi-Squared =         101.00 using 59 PHA bins.
# Reduced chi-squared =         1.8363 for     55 degrees of freedom 
# Null hypothesis probability =   1.558182e-04
 
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]    :   (  )
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:
Thu May 26 13:35:54 EDT 2011