batgrbproduct Analysis for Trigger=348650

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.44
    Process Start Time (local time): Tue Apr  7 19:23:54 EDT 2009
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger348650/GCN5_download_cron
======================================================================

  Trigger: 00348650      Segment: 000

  BAT Trigger Time: 260792910.272   [s; MET]
      Trigger Stop: 260792912.32   [s; MET]
               UTC: 2009-04-07T10:28:25.633160    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 68.9590365303165   Dec: -12.6649961806079  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.43
     Image Trigger?:     NO
     Rate S/N Ratio:     12.4498995979887  [ if not an image trigger ]
     Image S/N Ratio:    8.43

  Flight Position:   [ source = BAT ]
    RA: 68.9590365303165   Dec: -12.6649961806079  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 68.9785982128258   Dec: -12.6837990599888  [deg; J2000]  
        { 04h 35m 54.9s , -12d 41' 01.7" }
         +/- 2.16696983001464 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.03457789584122 [arcmin] (formal 1-sigma fit error)
    SNR: 10.0769376888119
 
  Angular difference between Flight and Ground position is 1.607492 arcmin
 
  Partial Coding Fraction: 0.84375    [ including projection effects ]

  Duration
     T90: 252.207999974489 +/- 48.109316858525
        Measured from: -12.0399999320507
                   to: 240.168000042439     [s; relative to TRIGTIME]
     T50: 205.199999988079 +/- 34.8631739274065
        Measured from: 0.648000061511993
                   to: 205.848000049591     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.443999975919724     
                   to: 1.44399997591972     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -17.6720000207424     
                   to: 306.231999993324     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.679227   0.611574   0.441851   0.060806
           0.093128   0.094041   0.087168   0.085369 [error]
 Peak      0.007885   0.036793   0.025200   0.014071
           0.005696   0.006051   0.005765   0.005570 [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 1.82e-07 2.84e-07 3.34e-07 7.61e-07 1.02e-06 1.56e-06   erg/cm2
              Error 4.19e-08 4.36e-08 8.52e-08 3.99e-07 1.96e-07 4.83e-07   erg/cm2
Peak flux Power-law 1.37e-01 1.91e-01 1.96e-01 3.69e-01 6.42e-01 8.94e-01   ph/cm2/s
              Error 6.00e-02 5.17e-02 4.38e-02 1.80e-01 1.40e-01 2.07e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.80e-07 2.88e-07 3.35e-07 6.49e-07 1.01e-06 1.41e-06   erg/cm2
              Error 4.51e-08 3.43e-08 8.63e-08 6.09e-07 1.96e-07 6.15e-07   erg/cm2
Peak flux Cutoff-PL 1.20e-01 1.99e-01 2.09e-01 2.05e-01 6.28e-01 7.33e-01   ph/cm2/s
              Error 4.95e-02 5.85e-02 5.22e-02 2.45e-01 1.06e-01 2.79e-01   ph/cm2/s
 
Fluence        Band 1.80e-07 2.84e-07 3.33e-07 7.51e-07 1.02e-06 1.56e-06   erg/cm2
              Error 4.56e-08 4.57e-08 6.46e-08 3.80e-07 1.97e-07 5.23e-07   erg/cm2
Peak flux      Band 1.20e-01 1.99e-01 2.09e-01 2.04e-01 6.28e-01 7.32e-01   ph/cm2/s
              Error 6.77e-02 5.85e-02 5.24e-02 2.45e-01 1.42e-01 3.45e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.765    0.295    -      -           3.43e-04 6.33e-05   53.258 57
CPL   1.278    0.000      67.9    0.0      6.28e-04 6.20e-04   53.668 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.959    0.367    -      -           5.58e-03 1.20e-03   49.967 57
CPL   0.377    1.260     153.6 5000.0      1.04e-02 2.91e-02   49.345 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: 2.304000 sec.
T50 in the 50-300 keV band: 1.280000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  323.904  -17.672  306.232
T90   252.208  -12.040  240.168
T50   205.200    0.648  205.848
Peak    1.000    0.444    1.444

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
   68.9786 -12.6838 0.0191   26.8    0.8       0.8342    10.1  TRIG_00348650       
------------------------------------------
 
Foreground time interval of the image:
-17.672  27.329 (delta_t =  45.001 [sec])
Background time interval of the image:
-239.272 -17.672 (delta_t = 221.600 [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
-17.672000 131.728000
132.728000 306.232000
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.76470     ( -0.285221   0.304320 )
Norm@50keV  : 3.432014E-04    ( -6.449039E-05   6.213429E-05) )
------------------------------------------------------------
 Chi-Squared =      53.25822     using    59 PHA bins.
 Reduced chi-squared =     0.9343548     for     57 degrees of freedom
 Null hypothesis probability = 0.616
 
Photon flux (15-150 keV)    in 322.9 sec: 4.666050E-02 ( -0.0071749  0.00717593 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.02166e-06 ( -1.93146e-07  1.99555e-07 ) ergs/cm2
 
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-17.672000 131.728000
132.728000 306.232000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.27780     (     )
Epeak [keV] : 67.9300      (   )
Norm@50keV  : 6.280751E-04    ( -1.000727E-04   1.140147E-03) )
------------------------------------------------------------
 Chi-Squared =      53.66824     using    59 PHA bins.
 Reduced chi-squared =     0.9583613     for     56 degrees of freedom
 Null hypothesis probability = 0.564
 
Photon flux (15-150 keV)    in 322.9 sec: 4.664519E-02 ( -0.0071726  0.00717351 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.01326e-06 ( -1.86233e-07  2.05949e-07 ) ergs/cm2
 
Band function
Multiple GTIs in the spectrum
tstart tstop
-17.672000 131.728000
132.728000 306.232000
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.52584   ( -7.37931   6.31385 )
beta        : -9.33522    ( -0.304312   0.285249 )
Epeak [keV] : 90.7726      ( -90.6726 9909.23 )
Norm@50keV   : 4.626259E-04    ( -8.769728E-03   8.446112E-03) )
------------------------------------------------------------
 Chi-Squared =      53.30234     using    59 PHA bins.
 Reduced chi-squared =     0.9691335     for     55 degrees of freedom
 Null hypothesis probability = 0.540
 
Photon flux (15-150 keV)    in 322.9 sec: 4.648759E-02 ( -0.00739084  0.00729038 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.02081e-06 ( -1.95484e-07  1.97883e-07 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    0.440 sec. to    1.448 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.959366     ( -0.382698   0.351740 )
Norm@50keV  : 5.584026E-03    ( -1.207883E-03   1.194401E-03) )
------------------------------------------------------------
 Chi-Squared =      49.96732     using    59 PHA bins.
 Reduced chi-squared =     0.8766196     for     57 degrees of freedom
 Null hypothesis probability = 0.734
 
Photon flux (15-150 keV)    in 1.008 sec: 0.641720 ( -0.139268  0.140206 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.17984e-08 ( -1.38777e-08  1.39897e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.440 sec. to    1.448 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.376549     ( -1.63222   0.888363 )
Epeak [keV] : 153.567      ( -153.557 9846.43 )
Norm@50keV  : 1.040854E-02    ( -1.040854E-02   4.771737E-02) )
------------------------------------------------------------
 Chi-Squared =      49.34536     using    59 PHA bins.
 Reduced chi-squared =     0.8811671     for     56 degrees of freedom
 Null hypothesis probability = 0.723
 
Photon flux (15-150 keV)    in 1.008 sec: 0.628473 ( -0.14137  0.071517 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.96485e-08 ( -1.52749e-08  1.47539e-08 ) ergs/cm2
 
Band function
Time interval is from    0.440 sec. to    1.448 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.381340   ( -9.61866   1.52713 )
beta        : -7.77342    ( -1.54585   5.92610 )
Epeak [keV] : 154.395      ( -154.452 9845.45 )
Norm@50keV   : 1.035959E-02    ( -7.123637E-09   0.147848 )
------------------------------------------------------------
 Chi-Squared =      49.34528     using    59 PHA bins.
 Reduced chi-squared =     0.8971868     for     55 degrees of freedom
 Null hypothesis probability = 0.690
 
Photon flux (15-150 keV)    in 1.008 sec: 0.628349 ( -0.141184  0.142856 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.88893e-08 ( -1.36742e-08  1.36924e-08 ) ergs/cm2
 
Plot creation:
Tue Apr  7 19:41:27 EDT 2009