batgrbproduct Analysis for Trigger=445038

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Wed Feb  9 06:59:02 EST 2011
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger445038/GCN5_download_cron
======================================================================

  Trigger: 00445038      Segment: 000

  BAT Trigger Time: 318892252.992   [s; MET]
      Trigger Stop: 318892254.016   [s; MET]
               UTC: 2011-02-08T21:10:46.347120    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 22.4841525330872   Dec: -20.6284702440465  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.81
     Image Trigger?:     NO
     Rate S/N Ratio:     10.4880884817015  [ if not an image trigger ]
     Image S/N Ratio:    7.81

  Flight Position:   [ source = BAT ]
    RA: 22.4841525330872   Dec: -20.6284702440465  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 22.4866104235306   Dec: -20.5613703159033  [deg; J2000]  
        { 01h 29m 56.8s , -20d 33' 40.9" }
         +/- 1.7823771178986 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.956738145287886 [arcmin] (formal 1-sigma fit error)
    SNR: 13.321328119467
 
  Angular difference between Flight and Ground position is 4.028362 arcmin
 
  Partial Coding Fraction: 1    [ including projection effects ]

  Duration
     T90: 36.7360000610352 +/- 7.9086787835079
        Measured from: -0.935999870300293
                   to: 35.8000001907349     [s; relative to TRIGTIME]
     T50: 7.79200005531311 +/- 16.4821455232554
        Measured from: 0.760000109672546
                   to: 8.55200016498566     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.460000038146973     
                   to: 1.46000003814697     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -1.54399996995926     
                   to: 40.7599999904633     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.231309   0.213315   0.082459   0.021424
           0.030647   0.030636   0.027388   0.024799 [error]
 Peak      0.018532   0.034972   0.021085   0.004361
           0.004964   0.005087   0.004456   0.003906 [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 6.47e-08 8.30e-08 7.78e-08 1.28e-07 2.69e-07 3.54e-07   erg/cm2
              Error 1.33e-08 1.38e-08 2.41e-08 7.71e-08 5.51e-08 1.07e-07   erg/cm2
Peak flux Power-law 2.01e-01 2.06e-01 1.49e-01 1.72e-01 6.22e-01 7.27e-01   ph/cm2/s
              Error 5.71e-02 3.89e-02 3.44e-02 7.74e-02 1.14e-01 1.37e-01   ph/cm2/s
 
Fluence   Cutoff-PL 6.11e-08 9.34e-08 6.84e-08 2.24e-08 2.40e-07 2.45e-07   erg/cm2
              Error 1.48e-08 1.98e-08 3.05e-08 9.05e-08 6.00e-08 1.19e-07   erg/cm2
Peak flux Cutoff-PL 1.44e-01 2.58e-01 1.55e-01 2.06e-02 5.76e-01 5.78e-01   ph/cm2/s
              Error 6.76e-02 5.57e-02 4.66e-02 1.20e-01 0.00e+00 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 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    2.094    0.316    -      -           6.84e-04 1.54e-04   58.010 57
CPL   1.061    1.582      34.7    0.0      2.92e-03 0.00e+00   56.380 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    1.469    0.287    -      -           5.02e-03 9.48e-04   45.470 57
CPL  -0.919    2.067      55.3   19.6      9.73e-02 9.90e-01   38.610 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   42.304   -1.544   40.760
T90    36.736   -0.936   35.800
T50     7.792    0.760    8.552
Peak    1.000    0.460    1.460

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
   22.4866 -20.5614 0.0144   13.7  158.6       0.4907    13.3  TRIG_00445038       
------------------------------------------
 
Foreground time interval of the image:
 -1.544  17.009 (delta_t =  18.553 [sec])
Background time interval of the image:
-239.992  -1.544 (delta_t = 238.448 [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   -1.544 sec. to   40.760 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.09399     ( -0.29935   0.332521 )
Norm@50keV  : 6.84250E-04    ( -0.000156461   0.000152227 )
------------------------------------------------------------
# Chi-Squared =          58.01 using 59 PHA bins.
# Reduced chi-squared =          1.018 for     57 degrees of freedom 
# Null hypothesis probability =   4.377127e-01
 
Photon flux (15-150 keV)    in 42.3 sec: 0.107332 ( -0.0168647  0.0168691 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.68764e-07 ( -5.36948e-08  5.65779e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -1.544 sec. to   40.760 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.06124     ( -1.91317   1.25045 )
Epeak [keV] : 34.6631      (   )
Norm@50keV  : 2.92080E-03    (     )
------------------------------------------------------------
# Chi-Squared =          56.38 using 59 PHA bins.
# Reduced chi-squared =          1.007 for     56 degrees of freedom 
# Null hypothesis probability =   4.607108e-01
 
Photon flux (15-150 keV)    in 42.3 sec: 0.103643 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.39821e-07 ( -5.34752e-08  6.65074e-08 ) ergs/cm2
 
Band function
Time interval is from   -1.544 sec. to   40.760 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.25296   ( 1.28236   2.02568 )
beta        : -10.00000    ( 5.91583e+08   5.91583e+08 )
Epeak [keV] : 33.8697      ( -32.4589 -34.0139 )
Norm@50keV   : 2.24413E-03    ( -0.00234784   0.0439488 )
------------------------------------------------------------
# Chi-Squared =          56.43 using 59 PHA bins.
# Reduced chi-squared =          1.026 for     55 degrees of freedom 
# Null hypothesis probability =   4.213157e-01
 
Photon flux (15-150 keV)    in 42.3 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    0.460 sec. to    1.460 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.46924     ( -0.284923   0.289953 )
Norm@50keV  : 5.02393E-03    ( -0.000951777   0.000944112 )
------------------------------------------------------------
# Chi-Squared =          45.47 using 59 PHA bins.
# Reduced chi-squared =         0.7976 for     57 degrees of freedom 
# Null hypothesis probability =   8.642404e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.622166 ( -0.113555  0.113683 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.79164e-08 ( -9.81705e-09  1.00578e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.460 sec. to    1.460 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.918519     ( -2.46993   1.66489 )
Epeak [keV] : 55.2510      ( -10.5201 28.7402 )
Norm@50keV  : 9.72586E-02    ( -0.0976894   1.88228 )
------------------------------------------------------------
# Chi-Squared =          38.61 using 59 PHA bins.
# Reduced chi-squared =         0.6894 for     56 degrees of freedom 
# Null hypothesis probability =   9.631467e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.576145 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.9725e-08 ( -9.2114e-09  1.08071e-08 ) ergs/cm2
 
Band function
Time interval is from    0.460 sec. to    1.460 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 0.910622   ( -0.766642   1.52872 )
beta        : -10.00000    ( 5.64083e+09   5.64083e+09 )
Epeak [keV] : 55.3314      ( -10.6453 28.6482 )
Norm@50keV   : 9.61422E-02    ( -0.0966478   1.81768 )
------------------------------------------------------------
# Chi-Squared =          38.61 using 59 PHA bins.
# Reduced chi-squared =         0.7019 for     55 degrees of freedom 
# Null hypothesis probability =   9.542241e-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]    :   (  )
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:
Wed Feb  9 07:13:19 EST 2011