batgrbproduct Analysis for Trigger=500108

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Fri Aug 12 13:07:00 EDT 2011
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger500108/GCN5_download_cron
======================================================================

  Trigger: 00500108      Segment: 000

  BAT Trigger Time: 334825704   [s; MET]
      Trigger Stop: 334826024   [s; MET]
               UTC: 2011-08-12T07:08:16.747960    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 277.362920345712   Dec: -23.789909800852  [deg; J2000]

     Catalogged Source?: YES
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    6.53
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    6.53

  Flight Position:   [ source = BAT ]
    RA: 277.362920345712   Dec: -23.789909800852  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 277.163862794595   Dec: -23.8249189400457  [deg; J2000]  
        { 18h 28m 39.3s , -23d 49' 29.7" }
         +/- 14.6973064409972 [arcmin] (estimated 90% radius based on SNR)
         +/- 16.9824975987034 [arcmin] (formal 1-sigma fit error)
    SNR: 0.654087547132566
 
  Angular difference between Flight and Ground position is 11.127218 arcmin
 
  Partial Coding Fraction: 0.296875    [ including projection effects ]

  Duration
     T90: 320 +/- 
        Measured from: 0
                   to: 320     [s; relative to TRIGTIME]
     T50: 320 +/- 
        Measured from: 0
                   to: 320     [s; relative to TRIGTIME]

    WARNING: battblocks failed.  Used TDRSS fore/background intervals

  Fluence
     Peak Flux  (peak 320 second)
        Measured from: 0     
                   to: 320     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0     
                   to: 320     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.082840  -0.133664  -0.128120  -0.006254
           0.133818   0.128312   0.109908   0.094822 [error]
 Peak      0.082840  -0.133664  -0.128120  -0.006254
           0.133818   0.128312   0.109908   0.094822 [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 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   erg/cm2
              Error 2.80e-08 2.11e-08 2.90e-08 1.41e-06 8.30e-08 1.43e-06   erg/cm2
Peak flux Power-law 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   ph/cm2/s
              Error 5.09e-03 2.05e-03 1.33e-03 1.81e-02 6.82e-03 6.89e-03   ph/cm2/s
 
Fluence   Cutoff-PL 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   erg/cm2
              Error 4.03e-08 3.38e-08 4.28e-08 2.16e-05 9.28e-08 1.32e-05   erg/cm2
Peak flux Cutoff-PL 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   ph/cm2/s
              Error 7.17e-03 3.39e-03 1.87e-03 1.24e-01 6.83e-03 9.40e-03   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    1.500    0.000    -      -           0.00e+00 4.14e-05   65.440 57
CPL   1.000    0.000      50.0    0.0      0.00e+00 0.00e+00   65.440 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    1.500    0.000    -      -           0.00e+00 4.14e-05   65.440 57
CPL   1.000    0.000      50.0    0.0      0.00e+00 0.00e+00   65.440 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  320.000    0.000  320.000
T90   320.000    0.000  320.000
T50   320.000    0.000  320.000
Peak  320.000    0.000  320.000

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  277.1639 -23.8249 0.2943   35.0   48.7       0.1786     0.7  TRIG_00500108       
------------------------------------------
 
Foreground time interval of the image:
115.000 299.290 (delta_t = 184.290 [sec])
300.000 303.050 (delta_t =   3.050 [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
115.000000 299.290000
300.000000 303.050000
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.50000     ( -1.5   -1.5 )
Norm@50keV  : 0.0    ( 0   8.28243e-05 )
------------------------------------------------------------
# Chi-Squared =          65.44 using 59 PHA bins.
# Reduced chi-squared =          1.148 for     57 degrees of freedom 
# Null hypothesis probability =   2.072857e-01
 
Photon flux (15-150 keV)    in 187.3 sec: 0.0 ( 0  0.0136428 ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  1.65971e-07 ) ergs/cm2
 
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
115.000000 299.290000
300.000000 303.050000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.00000     (     )
Epeak [keV] : 50.0000      (   )
Norm@50keV  : 0.0    (     )
------------------------------------------------------------
# Chi-Squared =          65.44 using 59 PHA bins.
# Reduced chi-squared =          1.168 for     56 degrees of freedom 
# Null hypothesis probability =   1.819131e-01
 
Photon flux (15-150 keV)    in 187.3 sec: 0.0 ( 0  0.0136619 ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  1.85558e-07 ) ergs/cm2
 
Band function
Multiple GTIs in the spectrum
tstart tstop
115.000000 299.290000
300.000000 303.050000
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.983950   ( 0.98395   0.98395 )
beta        : -2.50000    ( 2.5   2.5 )
Epeak [keV] : 80.0000      ( -80 -80 )
Norm@50keV   : 0.0    ( 0   354380 )
------------------------------------------------------------
# Chi-Squared =          65.44 using 59 PHA bins.
# Reduced chi-squared =          1.190 for     55 degrees of freedom 
# Null hypothesis probability =   1.584441e-01
 
Photon flux (15-150 keV)    in 187.3 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]    : 5.00000  (-5  -5)
R^2/D10^2   : 0.0  (0   0)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared =          65.44 using 59 PHA bins.
# Reduced chi-squared =          1.148 for     57 degrees of freedom 
# Null hypothesis probability =   2.072857e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  0.000e+00   0.000e+00
25- 50  0.000e+00   0.000e+00
50-150  0.000e+00   0.000e+00
15-150  0.000e+00   0.000e+00
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 7.00000       (-7      -7)
Norm        : 0.0       (0     0)
------------------------------------------------------------
# Chi-Squared =          65.44 using 59 PHA bins.
# Reduced chi-squared =          1.148 for     57 degrees of freedom 
# Null hypothesis probability =   2.072857e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  0.000e+00   0.000e+00
25- 50  0.000e+00   0.000e+00
50-150  0.000e+00   0.000e+00
15-150  0.000e+00   0.000e+00
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 4.00000        (-4      -4)
R1^2/D10^2  : 0.0        (0      0)
kT2 [keV]   : 10.0000        (-10      -10)
R2^2/D10^2  : 0.0    (0   0)
------------------------------------------------------------
# Chi-Squared =          65.44 using 59 PHA bins.
# Reduced chi-squared =          1.190 for     55 degrees of freedom 
# Null hypothesis probability =   1.584441e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  0.000e+00   0.000e+00
25- 50  0.000e+00   0.000e+00
50-150  0.000e+00   0.000e+00
15-150  0.000e+00   0.000e+00

Peak spectrum fit

Power-law model
Time interval is from  300.000 sec. to  303.050 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.50000     ( -1.5   -1.5 )
Norm@50keV  : 0.0    ( 0   8.28243e-05 )
------------------------------------------------------------
# Chi-Squared =          65.44 using 59 PHA bins.
# Reduced chi-squared =          1.148 for     57 degrees of freedom 
# Null hypothesis probability =   2.072857e-01
 
Photon flux (15-150 keV)    in 187.3 sec: 0.0 ( 0  0.0136428 ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  1.65971e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  300.000 sec. to  303.050 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.00000     (     )
Epeak [keV] : 50.0000      (   )
Norm@50keV  : 0.0    (     )
------------------------------------------------------------
# Chi-Squared =          65.44 using 59 PHA bins.
# Reduced chi-squared =          1.168 for     56 degrees of freedom 
# Null hypothesis probability =   1.819131e-01
 
Photon flux (15-150 keV)    in 187.3 sec: 0.0 ( 0  0.0136619 ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  1.85558e-07 ) ergs/cm2
 
Band function
Time interval is from  300.000 sec. to  303.050 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.983950   ( 0.98395   0.98395 )
beta        : -2.50000    ( 2.5   2.5 )
Epeak [keV] : 80.0000      ( -80 -80 )
Norm@50keV   : 0.0    ( 0   354380 )
------------------------------------------------------------
# Chi-Squared =          65.44 using 59 PHA bins.
# Reduced chi-squared =          1.190 for     55 degrees of freedom 
# Null hypothesis probability =   1.584441e-01
 
Photon flux (15-150 keV)    in 187.3 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]    : 5.00000  (-5  -5)
R^2/D10^2   : 0.0  (0   0)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared =          65.44 using 59 PHA bins.
# Reduced chi-squared =          1.148 for     57 degrees of freedom 
# Null hypothesis probability =   2.072857e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  0.000e+00   0.000e+00
25- 50  0.000e+00   0.000e+00
50-150  0.000e+00   0.000e+00
15-150  0.000e+00   0.000e+00
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 7.00000       (-7      -7)
Norm        : 0.0       (0     0)
------------------------------------------------------------
# Chi-Squared =          65.44 using 59 PHA bins.
# Reduced chi-squared =          1.148 for     57 degrees of freedom 
# Null hypothesis probability =   2.072857e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  0.000e+00   0.000e+00
25- 50  0.000e+00   0.000e+00
50-150  0.000e+00   0.000e+00
15-150  0.000e+00   0.000e+00
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 4.00000        (-4      -4)
R1^2/D10^2  : 0.0        (0      0)
kT2 [keV]   : 10.0000        (-10      -10)
R2^2/D10^2  : 0.0    (0   0)
------------------------------------------------------------
# Chi-Squared =          65.44 using 59 PHA bins.
# Reduced chi-squared =          1.190 for     55 degrees of freedom 
# Null hypothesis probability =   1.584441e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  0.000e+00   0.000e+00
25- 50  0.000e+00   0.000e+00
50-150  0.000e+00   0.000e+00
15-150  0.000e+00   0.000e+00
Plot creation:
Fri Aug 12 13:14:26 EDT 2011