batgrbproduct Analysis for Trigger=436094

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Tue Oct 12 02:11:49 EDT 2010
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger436094/GCN5_download_cron
======================================================================

  Trigger: 00436094      Segment: 000

  BAT Trigger Time: 308509121.6   [s; MET]
      Trigger Stop: 308509122.624   [s; MET]
               UTC: 2010-10-11T16:58:35.338240    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 48.2984265172764   Dec: -65.9859644209653  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    6.65
     Image Trigger?:     NO
     Rate S/N Ratio:     24.7991935352745  [ if not an image trigger ]
     Image S/N Ratio:    6.65

  Flight Position:   [ source = BAT ]
    RA: 48.2984265172764   Dec: -65.9859644209653  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 48.27336392433   Dec: -65.9894394576057  [deg; J2000]  
        { 03h 13m 05.6s , -65d 59' 22.0" }
         +/- 1.22658307788658 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.514985657053858 [arcmin] (formal 1-sigma fit error)
    SNR: 22.7200051013293
 
  Angular difference between Flight and Ground position is 0.646474 arcmin
 
  Partial Coding Fraction: 0.875    [ including projection effects ]

  Duration
     T90: 70.9839999675751 +/- 18.5808904171171
        Measured from: 0.388000071048737
                   to: 71.3720000386238     [s; relative to TRIGTIME]
     T50: 24.379999935627 +/- 5.3572369716253
        Measured from: 4.4080001115799
                   to: 28.7880000472069     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.224000036716461     
                   to: 0.775999963283539     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.379999995231628     
                   to: 87.0719999670982     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.486397   0.715941   0.634362   0.288451
           0.050400   0.052066   0.047133   0.043239 [error]
 Peak      0.036078   0.066442   0.049264   0.015223
           0.006244   0.006646   0.006327   0.005628 [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 1.39e-07 2.98e-07 5.02e-07 1.93e-06 1.38e-06 2.87e-06   erg/cm2
              Error 2.10e-08 2.59e-08 4.62e-08 4.17e-07 1.16e-07 4.42e-07   erg/cm2
Peak flux Power-law 3.72e-01 4.31e-01 3.58e-01 5.02e-01 1.34e+00 1.66e+00   ph/cm2/s
              Error 7.41e-02 5.40e-02 4.99e-02 1.42e-01 1.55e-01 2.05e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.39e-07 2.99e-07 5.03e-07 1.92e-06 1.38e-06 2.71e-06   erg/cm2
              Error 2.10e-08 2.60e-08 4.63e-08 4.14e-07 1.16e-07 5.90e-07   erg/cm2
Peak flux Cutoff-PL 3.30e-01 4.67e-01 3.78e-01 2.12e-01 1.31e+00 1.39e+00   ph/cm2/s
              Error 8.58e-02 6.97e-02 5.72e-02 2.68e-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    1.249    0.142    -      -           1.58e-03 1.18e-04   51.630 57
CPL   1.245    0.153    10000.0    0.0      1.58e-03 1.18e-04   51.670 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    1.265    0.189    -      -           1.13e-02 1.31e-03   57.160 57
CPL   0.496    0.823      95.1  -31.8      2.84e-02 4.61e-02   54.540 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: 35.584000 sec.
T50 in the 50-300 keV band: 21.056000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   87.452   -0.380   87.072
T90    70.984    0.388   71.372
T50    24.380    4.408   28.788
Peak    1.000   -0.224    0.776

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
   48.2734 -65.9894 0.0084   25.1    2.6       1.0887    22.7  TRIG_00436094       
------------------------------------------
 
Foreground time interval of the image:
 -0.380  16.701 (delta_t =  17.081 [sec])
Background time interval of the image:
-239.600  -0.380 (delta_t = 239.220 [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   -0.380 sec. to   87.072 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.24856     ( -0.143094   0.141348 )
Norm@50keV  : 1.57696E-03    ( -0.000117669   0.000117668 )
------------------------------------------------------------
# Chi-Squared =          51.63 using 59 PHA bins.
# Reduced chi-squared =         0.9057 for     57 degrees of freedom 
# Null hypothesis probability =   6.762260e-01
 
Photon flux (15-150 keV)    in 87.45 sec: 0.186468 ( -0.0144982  0.0145566 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.38067e-06 ( -1.15173e-07  1.15876e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.380 sec. to   87.072 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.24476     ( -0.174579   0.131735 )
Epeak [keV] : 10000.00      (   )
Norm@50keV  : 1.58398E-03    ( -0.000118218   0.000118212 )
------------------------------------------------------------
# Chi-Squared =          51.67 using 59 PHA bins.
# Reduced chi-squared =         0.9226 for     56 degrees of freedom 
# Null hypothesis probability =   6.394468e-01
 
Photon flux (15-150 keV)    in 87.45 sec: 0.186391 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.38077e-06 ( -1.15215e-07  1.15932e-07 ) ergs/cm2
 
Band function
Time interval is from   -0.380 sec. to   87.072 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.996898   ( 0.99707   0.99707 )
beta        : -1.24821    ( 1.24836   0.143024 )
Epeak [keV] : 52.3831      ( -52.1653 -52.1653 )
Norm@50keV   : 2.83793E-03    ( -0.00138032   0.497776 )
------------------------------------------------------------
# Chi-Squared =          51.63 using 59 PHA bins.
# Reduced chi-squared =         0.9386 for     55 degrees of freedom 
# Null hypothesis probability =   6.043601e-01
 
Photon flux (15-150 keV)    in 87.45 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   -0.224 sec. to    0.776 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.26472     ( -0.189991   0.188775 )
Norm@50keV  : 1.13217E-02    ( -0.00130973   0.00130717 )
------------------------------------------------------------
# Chi-Squared =          57.16 using 59 PHA bins.
# Reduced chi-squared =          1.003 for     57 degrees of freedom 
# Null hypothesis probability =   4.692261e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.34232 ( -0.154993  0.155095 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.12873e-07 ( -1.47253e-08  1.49105e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.224 sec. to    0.776 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.495987     ( -0.862126   0.784593 )
Epeak [keV] : 95.0914      ( -31.472 -95.104 )
Norm@50keV  : 2.84148E-02    ( -0.0223083   0.0698717 )
------------------------------------------------------------
# Chi-Squared =          54.54 using 59 PHA bins.
# Reduced chi-squared =         0.9739 for     56 degrees of freedom 
# Null hypothesis probability =   5.304463e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.30585 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.05247e-07 ( -1.74094e-08  1.7202e-08 ) ergs/cm2
 
Band function
Time interval is from   -0.224 sec. to    0.776 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 2.31525   ( -2.02183   -1.45486 )
beta        : -1.65405    ( -0.552558   0.373484 )
Epeak [keV] : 41.6977      ( -14.8923 55.417 )
Norm@50keV   : 1.92447    ( -1.9204   58.9337 )
------------------------------------------------------------
# Chi-Squared =          51.31 using 59 PHA bins.
# Reduced chi-squared =         0.9329 for     55 degrees of freedom 
# Null hypothesis probability =   6.164320e-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:
Tue Oct 12 02:34:32 EDT 2010