batgrbproduct Analysis for Trigger=434931

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Sun Sep 26 01:13:04 EDT 2010
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger434931/GCN5_download_cron
======================================================================

  Trigger: 00434931      Segment: 000

  BAT Trigger Time: 307100840   [s; MET]
      Trigger Stop: 307100904   [s; MET]
               UTC: 2010-09-25T09:47:13.789540    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 254.739181031072   Dec: -15.1913348712606  [deg; J2000]

     Catalogged Source?: YES
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    7
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    7

  Flight Position:   [ source = BAT ]
    RA: 254.739181031072   Dec: -15.1913348712606  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 254.73706676363   Dec: -15.2358195160024  [deg; J2000]  
        { 16h 58m 56.9s , -15d 14' 09.0" }
         +/- 3.10223345750368 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.65142621376477 [arcmin] (formal 1-sigma fit error)
    SNR: 6.03568087785981
 
  Angular difference between Flight and Ground position is 2.671884 arcmin
 
  Partial Coding Fraction: 1    [ including projection effects ]

  Duration
     T90: 64 +/- 
        Measured from: 0
                   to: 64     [s; relative to TRIGTIME]
     T50: 64 +/- 
        Measured from: 0
                   to: 64     [s; relative to TRIGTIME]

    WARNING: battblocks failed.  Used TDRSS fore/background intervals

  Fluence
     Peak Flux  (peak 64 second)
        Measured from: 0     
                   to: 64     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0     
                   to: 64     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.254154   0.163212   0.103358   0.085285
           0.049931   0.046562   0.042326   0.043651 [error]
 Peak      0.254154   0.163212   0.103358   0.085285
           0.049931   0.046562   0.042326   0.043651 [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 6.88e-08 7.52e-08 5.85e-08 7.48e-08 2.31e-07 2.77e-07   erg/cm2
              Error 2.16e-08 2.25e-08 3.54e-08 1.02e-07 8.08e-08 1.40e-07   erg/cm2
Peak flux Power-law 3.60e-02 2.17e-02 8.33e-03 4.28e-03 6.83e-02 7.03e-02   ph/cm2/s
              Error 1.09e-02 6.17e-03 4.82e-03 5.35e-03 1.68e-02 1.78e-02   ph/cm2/s
 
Fluence   Cutoff-PL 6.89e-08 7.53e-08 5.85e-08 7.41e-08 2.31e-07 2.74e-07   erg/cm2
              Error 2.16e-08 2.26e-08 3.54e-08 1.01e-07 8.08e-08 1.33e-07   erg/cm2
Peak flux Cutoff-PL 3.60e-02 2.17e-02 8.32e-03 4.25e-03 6.82e-02 7.03e-02   ph/cm2/s
              Error 1.09e-02 6.18e-03 4.82e-03 1.78e-02 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    2.362    0.611    -      -           3.72e-04 1.64e-04   47.180 57
CPL   2.433    0.556     183.4    0.0      3.22e-04 4.16e-02   47.140 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    2.379    0.591    -      -           3.73e-04 1.64e-04   47.900 57
CPL   1.987    0.000       1.2    0.0      6.48e-04 0.00e+00   48.210 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   64.000    0.000   64.000
T90    64.000    0.000   64.000
T50    64.000    0.000   64.000
Peak   64.000    0.000   64.000

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  254.7371 -15.2358 0.0317    0.0  168.5       0.5974     6.0  TRIG_00434931       
------------------------------------------
 
Foreground time interval of the image:
  0.000  64.000 (delta_t =  64.000 [sec])
Background time interval of the image:

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    0.000 sec. to   64.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.36175     ( -0.548238   0.672791 )
Norm@50keV  : 3.72488E-04    ( -0.000164812   0.000163546 )
------------------------------------------------------------
# Chi-Squared =          47.18 using 59 PHA bins.
# Reduced chi-squared =         0.8277 for     57 degrees of freedom 
# Null hypothesis probability =   8.200047e-01
 
Photon flux (15-150 keV)    in 64 sec: 6.74078E-02 ( -0.0170495  0.0170765 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.30605e-07 ( -7.61293e-08  8.55213e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to   64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.43347     ( -1.10201   0.0104534 )
Epeak [keV] : 183.438      (   )
Norm@50keV  : 3.22129E-04    ( -0.000327091   0.0829168 )
------------------------------------------------------------
# Chi-Squared =          47.14 using 59 PHA bins.
# Reduced chi-squared =         0.8418 for     56 degrees of freedom 
# Null hypothesis probability =   7.945212e-01
 
Photon flux (15-150 keV)    in 64 sec: 6.73796E-02 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.30534e-07 ( -7.60998e-08  8.5495e-08 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to   64.000 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 2.20311   ( 0.221836   0.221836 )
beta        : -2.46624    ( 2.44042   0.61861 )
Epeak [keV] : 18.4875      ( -17.6311 363.965 )
Norm@50keV   : 2.44922    ( -2.44456   277.401 )
------------------------------------------------------------
# Chi-Squared =          47.07 using 59 PHA bins.
# Reduced chi-squared =         0.8559 for     55 degrees of freedom 
# Null hypothesis probability =   7.676492e-01
 
Photon flux (15-150 keV)    in 64 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    0.000 sec. to   64.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.37905     ( -0.52948   0.652035 )
Norm@50keV  : 3.73419E-04    ( -0.00016358   0.00016351 )
------------------------------------------------------------
# Chi-Squared =          47.90 using 59 PHA bins.
# Reduced chi-squared =         0.8404 for     57 degrees of freedom 
# Null hypothesis probability =   7.991809e-01
 
Photon flux (15-150 keV)    in 64 sec: 6.82539E-02 ( -0.0167449  0.0167876 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.32042e-07 ( -7.55347e-08  8.49306e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to   64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.98741     (     )
Epeak [keV] : 1.20551      (   )
Norm@50keV  : 6.47571E-04    (     )
------------------------------------------------------------
# Chi-Squared =          48.21 using 59 PHA bins.
# Reduced chi-squared =         0.8610 for     56 degrees of freedom 
# Null hypothesis probability =   7.608699e-01
 
Photon flux (15-150 keV)    in 64 sec: 6.82259E-02 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.31969e-07 ( -7.55053e-08  8.49043e-08 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to   64.000 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 2.27047   ( 0.099068   0.099068 )
beta        : -2.49003    ( 2.45982   0.59807 )
Epeak [keV] : 18.1675      ( -17.2991 29.2123 )
Norm@50keV   : 3.09981    ( -3.13971   311.812 )
------------------------------------------------------------
# Chi-Squared =          47.76 using 59 PHA bins.
# Reduced chi-squared =         0.8684 for     55 degrees of freedom 
# Null hypothesis probability =   7.450128e-01
 
Photon flux (15-150 keV)    in 64 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:
Sun Sep 26 01:28:31 EDT 2010