batgrbproduct Analysis for Trigger=449399

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Wed Mar 16 13:52:16 EDT 2011
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger449399/GCN5_download_cron
======================================================================

  Trigger: 00449399      Segment: 000

  BAT Trigger Time: 321926231.296   [s; MET]
      Trigger Stop: 321926235.392   [s; MET]
               UTC: 2011-03-15T23:57:04.537480    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 279.191126332668   Dec: 17.5321484999389  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    11.06
     Image Trigger?:     NO
     Rate S/N Ratio:     9.74679434480896  [ if not an image trigger ]
     Image S/N Ratio:    11.06

  Flight Position:   [ source = BAT ]
    RA: 279.191126332668   Dec: 17.5321484999389  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 279.204959261802   Dec: 17.5372796426378  [deg; J2000]  
        { 18h 36m 49.2s , +17d 32' 14.2" }
         +/- 1.03706457989898 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.353870997063274 [arcmin] (formal 1-sigma fit error)
    SNR: 28.8761084020111
 
  Angular difference between Flight and Ground position is 0.849184 arcmin
 
  Partial Coding Fraction: 0.5703125    [ including projection effects ]

  Duration
     T90: 76.9159999489784 +/- 11.8127735561507
        Measured from: -49.8639999032021
                   to: 27.0520000457764     [s; relative to TRIGTIME]
     T50: 32.4679999351501 +/- 2.15120062307272
        Measured from: -20.5519998669624
                   to: 11.9160000681877     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 3.12800002098083     
                   to: 4.12800002098083     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -66.7639999985695     
                   to: 38.839999973774     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     2.075228   2.550104   1.651896   0.360618
           0.094823   0.088110   0.075514   0.067875 [error]
 Peak      0.059149   0.078619   0.041308   0.021078
           0.009719   0.009618   0.008157   0.006943 [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 7.24e-07 1.13e-06 1.32e-06 3.00e-06 4.06e-06 6.18e-06   erg/cm2
              Error 5.55e-08 5.02e-08 7.65e-08 3.82e-07 1.80e-07 4.34e-07   erg/cm2
Peak flux Power-law 6.24e-01 5.72e-01 3.62e-01 3.52e-01 1.70e+00 1.91e+00   ph/cm2/s
              Error 1.47e-01 8.49e-02 6.69e-02 1.31e-01 2.48e-01 2.69e-01   ph/cm2/s
 
Fluence   Cutoff-PL 7.07e-07 1.14e-06 1.33e-06 2.49e-06 4.02e-06 5.68e-06   erg/cm2
              Error 6.83e-08 5.40e-08 7.75e-08 8.77e-07 2.01e-07 9.11e-07   erg/cm2
Peak flux Cutoff-PL 5.77e-01 6.02e-01 3.74e-01 1.98e-01 1.67e+00 1.75e+00   ph/cm2/s
              Error 1.79e-01 1.10e-01 7.47e-02 3.56e-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    1.769    0.081    -      -           4.22e-03 1.82e-04   49.160 57
CPL   1.607    0.265     122.2    0.0      5.08e-03 0.00e+00   48.720 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    1.658    0.245    -      -           1.30e-02 1.91e-03   69.970 57
CPL   1.153    1.097      80.2   -6.5      2.40e-02 0.00e+00   69.370 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: 84.736000 sec.
T50 in the 50-300 keV band: 31.360000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  105.604  -66.764   38.840
T90    76.916  -49.864   27.052
T50    32.468  -20.552   11.916
Peak    1.000    3.128    4.128

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  279.2050 +17.5373 0.0066   40.5 -170.6       6.4506    28.9  TRIG_00449399       
------------------------------------------
 
Foreground time interval of the image:
-66.764 -38.696 (delta_t =  28.068 [sec])
-37.296  35.105 (delta_t =  72.401 [sec])
Background time interval of the image:
-239.296 -66.764 (delta_t = 172.532 [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
Multiple GTIs in the spectrum
tstart tstop
-66.764000 -38.696000
-37.296000 38.840000
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.76927     ( -0.0802396   0.0808851 )
Norm@50keV  : 4.22203E-03    ( -0.000182639   0.000181872 )
------------------------------------------------------------
# Chi-Squared =          49.16 using 59 PHA bins.
# Reduced chi-squared =         0.8624 for     57 degrees of freedom 
# Null hypothesis probability =   7.604984e-01
 
Photon flux (15-150 keV)    in 104.2 sec: 0.575000 ( -0.0262144  0.0263236 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.05531e-06 ( -1.7962e-07  1.80392e-07 ) ergs/cm2
 
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-66.764000 -38.696000
-37.296000 38.840000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.60682     ( -0.296496   0.232626 )
Epeak [keV] : 122.241      (   )
Norm@50keV  : 5.07502E-03    (     )
------------------------------------------------------------
# Chi-Squared =          48.72 using 59 PHA bins.
# Reduced chi-squared =         0.8699 for     56 degrees of freedom 
# Null hypothesis probability =   7.443527e-01
 
Photon flux (15-150 keV)    in 104.2 sec: 0.569746 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.01599e-06 ( -2.06837e-07  1.94614e-07 ) ergs/cm2
 
Band function
Multiple GTIs in the spectrum
tstart tstop
-66.764000 -38.696000
-37.296000 38.840000
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.39877   ( 1.31272   5.77038 )
beta        : -1.84853    ( 1.84454   0.140429 )
Epeak [keV] : 65.7420      ( -58.5626 -58.5626 )
Norm@50keV   : 6.82856E-03    ( -0.00272543   191.556 )
------------------------------------------------------------
# Chi-Squared =          48.18 using 59 PHA bins.
# Reduced chi-squared =         0.8761 for     55 degrees of freedom 
# Null hypothesis probability =   7.305784e-01
 
Photon flux (15-150 keV)    in 104.2 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    3.128 sec. to    4.128 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.65802     ( -0.241924   0.247382 )
Norm@50keV  : 1.30160E-02    ( -0.00192329   0.00190255 )
------------------------------------------------------------
# Chi-Squared =          69.97 using 59 PHA bins.
# Reduced chi-squared =          1.228 for     57 degrees of freedom 
# Null hypothesis probability =   1.161078e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.70409 ( -0.247684  0.248424 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.20958e-07 ( -1.86656e-08  1.88615e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    3.128 sec. to    4.128 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.15257     ( -1.47328   0.720926 )
Epeak [keV] : 80.2494      ( -67.2815 -80.3512 )
Norm@50keV  : 2.39921E-02    (     )
------------------------------------------------------------
# Chi-Squared =          69.37 using 59 PHA bins.
# Reduced chi-squared =          1.239 for     56 degrees of freedom 
# Null hypothesis probability =   1.080213e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.67016 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.16476e-07 ( -2.17869e-08  2.1041e-08 ) ergs/cm2
 
Band function
Time interval is from    3.128 sec. to    4.128 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.556692   ( 0.530638   2.49813 )
beta        : -2.07152    ( 2.0965   0.597299 )
Epeak [keV] : 56.7897      ( -56.3474 63.4267 )
Norm@50keV   : 5.25463E-02    ( -0.0545123   1186.13 )
------------------------------------------------------------
# Chi-Squared =          68.42 using 59 PHA bins.
# Reduced chi-squared =          1.244 for     55 degrees of freedom 
# Null hypothesis probability =   1.055494e-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 Mar 16 14:28:34 EDT 2011