batgrbproduct Analysis for Trigger=349450

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.44
    Process Start Time (local time): Sat Apr 18 00:47:30 EDT 2009
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger349450/GCN5_download_cron
======================================================================

  Trigger: 00349450      Segment: 000

  BAT Trigger Time: 261674408   [s; MET]
      Trigger Stop: 261674728   [s; MET]
               UTC: 2009-04-17T15:20:03.333200    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 209.706264668258   Dec: 47.000469086625  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    9.81
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    9.81

  Flight Position:   [ source = BAT ]
    RA: 209.706264668258   Dec: 47.000469086625  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 209.626001346873   Dec: 46.951528947653  [deg; J2000]  
        { 13h 58m 30.2s , +46d 57' 05.5" }
         +/- 4.06302238020679 [arcmin] (estimated 90% radius based on SNR)
         +/- 2.90801491938149 [arcmin] (formal 1-sigma fit error)
    SNR: 4.10519496698612
 
  Angular difference between Flight and Ground position is 4.406728 arcmin
 
  Partial Coding Fraction: 0.9453125    [ including projection effects ]

  Duration
     T90: 288.944000005722 +/- 42.327792158307
        Measured from: 301.276000082493
                   to: 590.220000088215     [s; relative to TRIGTIME]
     T50: 153.655999988317 +/- 25.3709044327823
        Measured from: 373.256000101566
                   to: 526.912000089884     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 409.699999988079     
                   to: 410.699999988079     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 278.687999993563     
                   to: 617.076000005007     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.624295   1.483018   1.013495   0.247278
           0.090181   0.090152   0.080283   0.070612 [error]
 Peak      0.021063   0.009867   0.008266   0.003437
           0.004981   0.004938   0.004248   0.003803 [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 4.50e-07 6.68e-07 7.40e-07 1.55e-06 2.33e-06 3.40e-06   erg/cm2
              Error 4.91e-08 4.39e-08 8.21e-08 3.62e-07 1.83e-07 4.32e-07   erg/cm2
Peak flux Power-law 1.62e-01 1.00e-01 4.00e-02 2.15e-02 3.13e-01 3.24e-01   ph/cm2/s
              Error 7.15e-02 4.18e-02 3.25e-02 3.69e-02 1.14e-01 1.22e-01   ph/cm2/s
 
Fluence   Cutoff-PL 4.50e-07 6.68e-07 7.40e-07 1.53e-06 2.33e-06 3.40e-06   erg/cm2
              Error 4.91e-08 4.39e-08 8.22e-08 3.59e-07 1.83e-07 4.30e-07   erg/cm2
Peak flux Cutoff-PL 1.62e-01 1.00e-01 3.99e-02 2.13e-02 3.13e-01 3.23e-01   ph/cm2/s
              Error 7.15e-02 4.19e-02 3.25e-02 3.65e-02 1.14e-01 1.22e-01   ph/cm2/s
 
Fluence        Band 4.29e-07 6.63e-07 7.67e-07 1.57e-06 2.34e-06 3.57e-06   erg/cm2
              Error 2.81e-08 0.00e+00 0.00e+00 2.31e-07 1.61e-07 2.34e-07   erg/cm2
Peak flux      Band 1.50e-01 1.04e-01 4.71e-02 3.02e-02 3.05e-01 3.40e-01   ph/cm2/s
              Error 5.57e-02 3.83e-02 2.89e-02 2.37e-02 1.08e-01 0.00e+00   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.852    0.137    -      -           7.48e-04 5.81e-05   70.547 57
CPL   1.817    0.000     269.0    0.0      7.78e-04 2.89e-04   70.872  0
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.326    0.878    -      -           1.77e-03 1.43e-03   56.283 57
CPL   1.991    0.000       1.1    0.0      2.80e-03 0.00e+00   56.556 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: 228.992000 sec.
T50 in the 50-300 keV band: 128.384000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  338.388  278.688  617.076
T90   288.944  301.276  590.220
T50   153.656  373.256  526.912
Peak    1.000  409.700  410.700

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  209.6260 +46.9515 0.0469   18.9   18.3       0.2963     4.1  TRIG_00349450       
------------------------------------------
 
Foreground time interval of the image:
278.688 335.101 (delta_t =  56.413 [sec])
Background time interval of the image:
-239.000 -158.140 (delta_t =  80.860 [sec])
-157.000 278.688 (delta_t = 435.688 [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  278.688 sec. to  617.076 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.85226     ( -0.134666   0.138349 )
Norm@50keV  : 7.479768E-04    ( -5.858543E-05   5.753984E-05) )
------------------------------------------------------------
 Chi-Squared =      70.54688     using    59 PHA bins.
 Reduced chi-squared =      1.237664     for     57 degrees of freedom
 Null hypothesis probability = 0.107
 
Photon flux (15-150 keV)    in 338.4 sec: 0.105232 ( -0.00704008  0.007059 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.32724e-06 ( -1.81403e-07  1.83859e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  278.688 sec. to  617.076 sec.
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.81670     (     )
Epeak [keV] : 268.968      (   )
Norm@50keV  : 7.783260E-04    ( -1.469394E-04   4.301397E-04) )
------------------------------------------------------------
 Chi-Squared =      70.87151     using    59 PHA bins.
 but latest trial   1.58883     gives Chi-Squared =   2.93780
 Reduced chi-squared =      1.265563     for     56 degrees of freedom
 Null hypothesis probability = 8.709E-02
 
Photon flux (15-150 keV)    in 338.4 sec: 0.105183 ( -0.007037  0.007056 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.32681e-06 ( -1.8123e-07  1.84066e-07 ) ergs/cm2
 
Band function
Time interval is from  278.688 sec. to  617.076 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.37649   ( -0.207387   11.0282 )
beta        : -1.85063    ( -0.138392   0.134668 )
Epeak [keV] : 25.1902      ( -25.0902 9974.81 )
Norm@50keV   : 1.896112E-03    ( -7.963330E-03   7.820725E-03) )
------------------------------------------------------------
 Chi-Squared =      70.57533     using    59 PHA bins.
 Reduced chi-squared =      1.283188     for     55 degrees of freedom
 Null hypothesis probability = 7.686E-02
 
Photon flux (15-150 keV)    in 338.4 sec: 0.713136 ( -0.534838  2178.39 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.33662e-06 ( -1.56189e-07  1.66195e-07 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from  409.700 sec. to  410.700 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.32627     ( -0.774625   0.981189 )
Norm@50keV  : 1.765541E-03    ( -1.765541E-03   1.102931E-03) )
------------------------------------------------------------
 Chi-Squared =      56.28255     using    59 PHA bins.
 Reduced chi-squared =     0.9874132     for     57 degrees of freedom
 Null hypothesis probability = 0.502
 
Photon flux (15-150 keV)    in 1.000 sec: 0.313118 ( -0.113367  0.11381 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.69542e-08 ( -7.83753e-09  9.4308e-09 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  409.700 sec. to  410.700 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.99083     (     )
Epeak [keV] : 1.06373      (   )
Norm@50keV  : 2.802749E-03    (     )
------------------------------------------------------------
 Chi-Squared =      56.55642     using    59 PHA bins.
 Reduced chi-squared =      1.009936     for     56 degrees of freedom
 Null hypothesis probability = 0.454
 
Photon flux (15-150 keV)    in 1.000 sec: 0.312963 ( -0.113328  0.113775 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.69508e-08 ( -7.83648e-09  9.4175e-09 ) ergs/cm2
 
Band function
Time interval is from  409.700 sec. to  410.700 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.44641   ( -8.55359   6.44641 )
beta        : -2.60928    ( -7.39072   0.984771 )
Epeak [keV] : 16.1981      ( -16.0981 253.947 )
Norm@50keV   : 8.126185E-03    ( -243.632   557.858 )
------------------------------------------------------------
 Chi-Squared =      55.80872     using    59 PHA bins.
 Reduced chi-squared =      1.014704     for     55 degrees of freedom
 Null hypothesis probability = 0.444
 
Photon flux (15-150 keV)    in 1.000 sec: 0.305203 ( -0.1114  0.103717 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.17528e-08 ( -4.12236e-09  6.8637e-09 ) ergs/cm2
 
Plot creation:
Sat Apr 18 01:08:42 EDT 2009