batgrbproduct Analysis for Trigger=439550

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Wed Dec  1 07:37:06 EST 2010
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger439550/GCN5_download_cron
======================================================================

  Trigger: 00439550      Segment: 000

  BAT Trigger Time: 312824136   [s; MET]
      Trigger Stop: 312824712   [s; MET]
               UTC: 2010-11-30T15:35:29.580540    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 211.975325090801   Dec: -61.9882963739414  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    7.66
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    7.66

  Flight Position:   [ source = BAT ]
    RA: 211.975325090801   Dec: -61.9882963739414  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 212.073063514271   Dec: -61.9124485156679  [deg; J2000]  
        { 14h 08m 17.5s , -61d 54' 44.8" }
         +/- 4.01312861062893 [arcmin] (estimated 90% radius based on SNR)
         +/- 3.70520644186105 [arcmin] (formal 1-sigma fit error)
    SNR: 4.17830075261716
 
  Angular difference between Flight and Ground position is 5.321167 arcmin
 
  Partial Coding Fraction: 1    [ including projection effects ]

  Duration
     T90: 576 +/- 
        Measured from: 0
                   to: 576     [s; relative to TRIGTIME]
     T50: 576 +/- 
        Measured from: 0
                   to: 576     [s; relative to TRIGTIME]

    WARNING: battblocks failed.  Used TDRSS fore/background intervals

  Fluence
     Peak Flux  (peak 576 second)
        Measured from: 0     
                   to: 576     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0     
                   to: 576     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.880306   0.509264  -0.034335  -0.020423
           0.131778   0.134613   0.119094   0.106556 [error]
 Peak      0.880306   0.509264  -0.034335  -0.020423
           0.131778   0.134613   0.119094   0.106556 [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 2.32e-07 1.80e-07 9.34e-08 7.02e-08 5.37e-07 5.75e-07   erg/cm2
              Error 5.53e-08 6.31e-08 6.53e-08 1.01e-07 1.77e-07 2.26e-07   erg/cm2
Peak flux Power-law 1.35e-02 5.92e-03 1.56e-03 5.07e-04 2.12e-02 2.14e-02   ph/cm2/s
              Error 3.00e-03 1.93e-03 1.37e-03 6.62e-04 4.90e-03 5.04e-03   ph/cm2/s
 
Fluence   Cutoff-PL 2.50e-07 1.92e-07 1.51e-08 2.97e-11 4.57e-07 4.57e-07   erg/cm2
              Error 6.51e-08 9.74e-08 5.27e-08 1.94e-08 1.40e-07 1.41e-07   erg/cm2
Peak flux Cutoff-PL 1.44e-02 6.51e-03 2.50e-04 1.82e-07 2.12e-02 2.12e-02   ph/cm2/s
              Error 3.50e-03 4.62e-03 8.42e-04 4.63e-03 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    2.897    0.595    -      -           8.28e-05 6.26e-05   63.080 57
CPL  -2.792    0.000      20.9    0.0      1.79e+00 0.00e+00   59.980 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    2.875    0.567    -      -           8.51e-05 4.21e-05   64.390 57
CPL  -2.646    0.000      20.8    0.0      1.45e+00 0.00e+00   60.820 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  576.000    0.000  576.000
T90   576.000    0.000  576.000
T50   576.000    0.000  576.000
Peak  576.000    0.000  576.000

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  212.0731 -61.9124 0.0460    7.7  -78.9       1.4936     4.2  TRIG_00439550       
------------------------------------------
 
Foreground time interval of the image:
  0.000  60.750 (delta_t =  60.750 [sec])
 61.000 576.000 (delta_t = 515.000 [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
Multiple GTIs in the spectrum
tstart tstop
0.000000 60.750000
61.000000 576.000000
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.89675     ( -0.484559   0.706082 )
Norm@50keV  : 8.27947E-05    ( -8.20454e-05   4.30933e-05 )
------------------------------------------------------------
# Chi-Squared =          63.08 using 59 PHA bins.
# Reduced chi-squared =          1.107 for     57 degrees of freedom 
# Null hypothesis probability =   2.702704e-01
 
Photon flux (15-150 keV)    in 575.8 sec: 2.10161E-02 ( -0.00504839  0.00510636 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.36927e-07 ( -1.6445e-07  1.89068e-07 ) ergs/cm2
 
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
0.000000 60.750000
61.000000 576.000000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.79192     (     )
Epeak [keV] : 20.9492      (   )
Norm@50keV  : 1.79464    (     )
------------------------------------------------------------
# Chi-Squared =          59.98 using 59 PHA bins.
# Reduced chi-squared =          1.071 for     56 degrees of freedom 
# Null hypothesis probability =   3.334425e-01
 
Photon flux (15-150 keV)    in 575.8 sec: 2.10096E-02 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.56791e-07 ( -1.28327e-07  1.52383e-07 ) ergs/cm2
 
Band function
Multiple GTIs in the spectrum
tstart tstop
0.000000 60.750000
61.000000 576.000000
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 0.799428   ( -1.60012   0.243557 )
beta        : -9.99990    ( 30850   30860 )
Epeak [keV] : 19.7146      ( -16.4739 5.79914 )
Norm@50keV   : 4.81739E-02    ( -0.0588584   36.0699 )
------------------------------------------------------------
# Chi-Squared =          59.77 using 59 PHA bins.
# Reduced chi-squared =          1.087 for     55 degrees of freedom 
# Null hypothesis probability =   3.064819e-01
 
Photon flux (15-150 keV)    in 575.8 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   61.000 sec. to  576.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.87543     ( -0.455138   0.679815 )
Norm@50keV  : 8.50541E-05    ( -4.1699e-05   4.24089e-05 )
------------------------------------------------------------
# Chi-Squared =          64.39 using 59 PHA bins.
# Reduced chi-squared =          1.130 for     57 degrees of freedom 
# Null hypothesis probability =   2.339638e-01
 
Photon flux (15-150 keV)    in 575.8 sec: 2.12322E-02 ( -0.00486246  0.00493476 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.45154e-07 ( -1.62818e-07  1.8807e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   61.000 sec. to  576.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.64611     (     )
Epeak [keV] : 20.7571      (   )
Norm@50keV  : 1.44916    (     )
------------------------------------------------------------
# Chi-Squared =          60.82 using 59 PHA bins.
# Reduced chi-squared =          1.086 for     56 degrees of freedom 
# Null hypothesis probability =   3.064757e-01
 
Photon flux (15-150 keV)    in 575.8 sec: 2.11736E-02 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.59927e-07 ( -6.35919e-08  1.49874e-07 ) ergs/cm2
 
Band function
Time interval is from   61.000 sec. to  576.000 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -5.31331   ( 0.822496   3.57137 )
beta        : -2.92525    ( -0.632514   0.498059 )
Epeak [keV] : 26.5762      ( -26.5762 -26.5762 )
Norm@50keV   : 1.10738E-02    ( -0.0052796   0.00613371 )
------------------------------------------------------------
# Chi-Squared =          64.36 using 59 PHA bins.
# Reduced chi-squared =          1.170 for     55 degrees of freedom 
# Null hypothesis probability =   1.815668e-01
 
Photon flux (15-150 keV)    in 575.8 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 Dec  1 08:09:04 EST 2010