batgrbproduct Analysis for Trigger=340986

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.42
    Process Start Time (local time): Sat Jan 24 08:46:43 EST 2009
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger340986/GCN5_download_cron
======================================================================

  Trigger: 00340986      Segment: 000

  BAT Trigger Time: 254463086.656   [s; MET]
      Trigger Stop: 254463086.688   [s; MET]
               UTC: 2009-01-24T04:11:22.214780    [includes UTCF correction] 
       Where From?: (*SHORT BURST*) TDRSS scaled map message

  BAT 
    RA: 237.697582708386   Dec: -54.316459849281  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    14.83
     Image Trigger?:     NO
     Rate S/N Ratio:     54.5343928177439  [ if not an image trigger ]
     Image S/N Ratio:    14.83

  Flight Position:   [ source = BAT ]
    RA: 237.697582708386   Dec: -54.316459849281  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 237.731679923622   Dec: -54.3190847622001  [deg; J2000]  
        { 15h 50m 55.6s , -54d 19' 08.7" }
         +/- 1.14402406195708 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.410295110376255 [arcmin] (formal 1-sigma fit error)
    SNR: 25.0980269600913
 
  Angular difference between Flight and Ground position is 1.203661 arcmin
 
  Partial Coding Fraction: 0.3984375    [ including projection effects ]

  Duration
     T90: 0.57600000500679 +/- 0.016970554993457
        Measured from: -0.0119999051094055
                   to: 0.564000099897385     [s; relative to TRIGTIME]
     T50: 0.448000013828278 +/- 0.048662105768992
        Measured from: 0.0200001001358032
                   to: 0.468000113964081     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.217999994754791     
                   to: 0.782000005245209     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.0239999890327454     
                   to: 0.584000021219254     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.153403   0.195416   0.105942   0.010242
           0.010261   0.010554   0.008987   0.005274 [error]
 Peak      0.153764   0.196085   0.106196   0.009918
           0.010293   0.010618   0.009020   0.005290 [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 5.63e-08 7.68e-08 7.72e-08 1.41e-07 2.56e-07 3.92e-07   erg/cm2
              Error 5.51e-09 5.24e-09 8.02e-09 2.85e-08 1.94e-08 0.00e+00   erg/cm2
Peak flux Power-law 3.02e+00 2.27e+00 1.14e+00 8.20e-01 6.81e+00 7.25e+00   ph/cm2/s
              Error 3.01e-01 1.56e-01 1.15e-01 1.54e-01 4.74e-01 4.95e-01   ph/cm2/s
 
Fluence   Cutoff-PL 4.68e-08 8.99e-08 8.05e-08 2.90e-08 2.39e-07 2.92e-07   erg/cm2
              Error 6.54e-09 7.30e-09 9.90e-09 1.73e-08 2.02e-08 0.00e+00   erg/cm2
Peak flux Cutoff-PL 2.45e+00 2.63e+00 1.23e+00 2.28e-01 6.50e+00 6.53e+00   ph/cm2/s
              Error 3.60e-01 2.09e-01 1.42e-01 1.19e-01 4.87e-01 5.02e-01   ph/cm2/s
 
Fluence        Band 4.65e-08 8.95e-08 8.04e-08 2.91e-08 2.39e-07 2.69e-07   erg/cm2
              Error 5.37e-09 5.16e-09 7.44e-09 2.72e-08 1.32e-08 0.00e+00   erg/cm2
Peak flux      Band 2.45e+00 2.62e+00 1.22e+00 2.30e-01 6.48e+00 6.53e+00   ph/cm2/s
              Error 2.49e-01 1.83e-01 9.49e-02 1.55e-01 4.58e-01 4.98e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.990    0.115    -      -           4.56e-02 3.57e-03   95.354 57
CPL   0.562    0.603      46.4    5.5      2.68e-01 2.28e-01   73.400 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.993    0.115    -      -           4.55e-02 3.57e-03   92.289 57
CPL   0.548    0.606      46.4    5.4      2.72e-01 2.32e-01   69.991 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: 0.576000 sec.
T50 in the 50-300 keV band: 0.448000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    0.608   -0.024    0.584
T90     0.576   -0.012    0.564
T50     0.448    0.020    0.468
Peak    1.000   -0.218    0.782

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  237.7317 -54.3191 0.0076   34.7 -120.1       0.4862    25.1  TRIG_00340986       
------------------------------------------
 
Foreground time interval of the image:
 -0.024   0.584 (delta_t =   0.608 [sec])
Background time interval of the image:
-119.656  -0.024 (delta_t = 119.632 [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   -0.024 sec. to    0.584 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.99039     ( -0.112880   0.117115 )
Norm@50keV  : 4.564495E-02    ( -3.592037E-03   3.556579E-03) )
------------------------------------------------------------
 Chi-Squared =      95.35365     using    59 PHA bins.
 Reduced chi-squared =      1.672871     for     57 degrees of freedom
 Null hypothesis probability = 1.093E-03
 
Photon flux (15-150 keV)    in 0.6080 sec: 6.81663 ( -0.47447  0.47489 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.55787e-07 ( -1.92852e-08  1.94402e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.024 sec. to    0.584 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.561709     ( -0.641738   0.564732 )
Epeak [keV] : 46.4266      ( -5.11976 5.90300 )
Norm@50keV  : 0.267528    ( -0.133080   0.323310 )
------------------------------------------------------------
 Chi-Squared =      73.40036     using    59 PHA bins.
 Reduced chi-squared =      1.310721     for     56 degrees of freedom
 Null hypothesis probability = 5.927E-02
 
Photon flux (15-150 keV)    in 0.6080 sec: 6.50482 ( -0.48612  0.48789 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.39151e-07 ( -2.00409e-08  2.02902e-08 ) ergs/cm2
 
Band function
Time interval is from   -0.024 sec. to    0.584 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.572415   ( -0.553851   0.649811 )
beta        : -9.27882    ( -0.721176   6.62214 )
Epeak [keV] : 46.4197      ( -5.05099 5.89746 )
Norm@50keV   : 0.264135    ( -0.129643   0.240844 )
------------------------------------------------------------
 Chi-Squared =      73.40163     using    59 PHA bins.
 Reduced chi-squared =      1.334575     for     55 degrees of freedom
 Null hypothesis probability = 4.927E-02
 
Photon flux (15-150 keV)    in 0.6080 sec: 6.50474 ( -0.48596  0.4795 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.39075e-07 ( -1.60074e-08  1.04868e-08 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 11.5123       -0.8179  0.865
R^2/D10^2   : 1.95181  -0.4702   0.62472
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
 Chi-Squared =      95.39524     using    59 PHA bins.
 Reduced chi-squared =      1.673601     for     57 degrees of freedom
 Null hypothesis probability = 1.083E-03
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.311e-08   4.225e-09
25- 50  9.915e-08   7.442e-09
50-150  7.677e-08   1.297e-08
15-150  2.090e-07   1.771e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 71.7160       -12.0974      15.9717
Norm        : 33.6782       -3.3801      3.7539
------------------------------------------------------------
 Chi-Squared =      78.39876     using    59 PHA bins.
 Reduced chi-squared =      1.375417     for     57 degrees of freedom
 Null hypothesis probability = 3.159E-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.266e-08   5.153e-09
25- 50  8.434e-08   5.685e-09
50-150  1.103e-07   1.846e-08
15-150  2.473e-07   2.046e-08
Double BB
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.26657       -1.60973      2.04822
R1^2/D10^2  : 17.3405       -11.2554     36.7364
kT2 [keV]   : 15.0067       -2.0073      3.4457
R2^2/D10^2  : 0.565904      -0.363141    1e+24
------------------------------------------------------------
 Chi-Squared =      72.88322     using    59 PHA bins.
 but latest trial   76.0622     gives Chi-Squared =   288.121
 Reduced chi-squared =      1.325149     for     55 degrees of freedom
 Null hypothesis probability = 5.359E-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.764e-08   1.462e-08
25- 50  8.776e-08   1.784e-08
50-150  1.001e-07   2.557e-08
15-150  2.355e-07   4.909e-08

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from   -0.024 sec. to    0.588 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.99288     ( -0.112745   0.117203 )
Norm@50keV  : 4.554218E-02    ( -3.588319E-03   3.549915E-03) )
------------------------------------------------------------
 Chi-Squared =      92.28859     using    59 PHA bins.
 Reduced chi-squared =      1.619098     for     57 degrees of freedom
 Null hypothesis probability = 2.141E-03
 
Photon flux (15-150 keV)    in 0.6120 sec: 6.80909 ( -0.47409  0.47459 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.56906e-07 ( -1.93661e-08  1.95638e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.024 sec. to    0.588 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.548202     ( -0.644343   0.567005 )
Epeak [keV] : 46.4088      ( -5.07922 5.82030 )
Norm@50keV  : 0.271780    ( -0.135457   0.329525 )
------------------------------------------------------------
 Chi-Squared =      69.99126     using    59 PHA bins.
 Reduced chi-squared =      1.249844     for     56 degrees of freedom
 Null hypothesis probability = 9.896E-02
 
Photon flux (15-150 keV)    in 0.6120 sec: 6.49522 ( -0.486  0.48754 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.4028e-07 ( -2.00399e-08  2.03857e-08 ) ergs/cm2
 
Band function
Time interval is from   -0.024 sec. to    0.588 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.551295   ( -0.563633   0.645442 )
beta        : -9.16920    (     )
Epeak [keV] : 46.3833      (   )
Norm@50keV   : 0.270914    (     )
------------------------------------------------------------
 Chi-Squared =      69.99181     using    59 PHA bins.
 Reduced chi-squared =      1.272578     for     55 degrees of freedom
 Null hypothesis probability = 8.391E-02
 
Photon flux (15-150 keV)    in 0.6120 sec: 6.48473 ( -0.48124  0.43512 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.39889e-07 ( -9.84708e-09  2.02511e-08 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 11.5386       -0.8142  0.8625
R^2/D10^2   : 1.93529  -0.46428   0.61427
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
 Chi-Squared =      91.59755     using    59 PHA bins.
 Reduced chi-squared =      1.606975     for     57 degrees of freedom
 Null hypothesis probability = 2.483E-03
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.321e-08   3.931e-09
25- 50  9.971e-08   7.286e-09
50-150  7.769e-08   1.189e-08
15-150  2.106e-07   1.627e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 71.5525       -12.0539      15.8191
Norm        : 33.6732       -3.3723      3.7597
------------------------------------------------------------
 Chi-Squared =      75.14938     using    59 PHA bins.
 Reduced chi-squared =      1.318410     for     57 degrees of freedom
 Null hypothesis probability = 5.392E-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.299e-08   5.139e-09
25- 50  8.480e-08   5.780e-09
50-150  1.107e-07   1.708e-08
15-150  2.485e-07   2.187e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.10697       -1.60117      2.04838
R1^2/D10^2  : 19.1470       -12.8485     73.5769
kT2 [keV]   : 14.8088       -1.9095      3.2024
R2^2/D10^2  : 0.604858      -0.375848    1e+24
------------------------------------------------------------
 Chi-Squared =      69.33544     using    59 PHA bins.
 Reduced chi-squared =      1.260644     for     55 degrees of freedom
 Null hypothesis probability = 9.246E-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.802e-08   1.482e-08
25- 50  8.818e-08   1.914e-08
50-150  1.002e-07   2.498e-08
15-150  2.364e-07   4.249e-08
Plot creation:
Sat Jan 24 09:05:22 EST 2009