batgrbproduct Analysis for Trigger=153466

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Thu Jan 10 19:03:54 EST 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger153466/SDC
======================================================================

  Trigger: 00153466      Segment: 000

  BAT Trigger Time: 147476232   [s; MET]
      Trigger Stop: 147476296   [s; MET]
               UTC: 2005-09-03T21:37:12.290320    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 76.9121038484506   Dec: 14.9676424840988  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    16.75
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    16.75

  Flight Position:   [ source = BAT ]
    RA: 76.9121038484506   Dec: 14.9676424840988  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 76.9091980367453   Dec: 14.9498438096586  [deg; J2000]  
        { 05h 07m 38.2s , +14d 56' 59.4" }
         +/- 1.47084153510103 [arcmin] (estimated 90% radius based on SNR)
         +/- 2.5192059795197 [arcmin] (formal 1-sigma fit error)
    SNR: 17.5282493896147
    RA  =   5h  7m 38.2s  (76.909198 deg.)
    Dec =  14d 56' 59" (14.949844 deg.)
 
  Angular difference between Flight and Ground position is 1.081123 arcmin
 
  Partial Coding Fraction: 1.015625    [ including projection effects ]

  Duration
     T90: 78.4799999892712 +/- 17.5519799472907
        Measured from: -14.4519999921322
                   to: 64.027999997139     [s; relative to TRIGTIME]
     T50: 31.6840000152588 +/- 4.22570609761023
        Measured from: 12.7599999904633
                   to: 44.444000005722     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 31.9880000054836     
                   to: 32.9880000054836     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -30.6399999856949     
                   to: 74.9839999973774     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.072348   0.967910   0.385750   0.068833
           0.050995   0.050983   0.044059   0.040432 [error]
 Peak      0.025396   0.018655   0.011248   0.004794
           0.005086   0.004954   0.004362   0.003937 [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 3.14e-07 3.86e-07 3.44e-07 5.32e-07 1.23e-06 1.57e-06   erg/cm2
              Error 3.17e-08 2.52e-08 4.20e-08 1.31e-07 9.28e-08 1.74e-07   erg/cm2
Peak flux Power-law 2.00e-01 1.57e-01 8.26e-02 6.31e-02 4.68e-01 5.03e-01   ph/cm2/s
              Error 6.68e-02 3.85e-02 3.39e-02 4.99e-02 1.14e-01 1.27e-01   ph/cm2/s
 
Fluence   Cutoff-PL 3.10e-07 3.91e-07 3.41e-07 4.13e-07 1.21e-06 1.44e-06   erg/cm2
              Error 3.51e-08 2.98e-08 3.38e-08 2.60e-07 1.14e-07 3.00e-07   erg/cm2
Peak flux Cutoff-PL 1.97e-01 1.69e-01 7.74e-02 2.32e-02 4.60e-01 4.66e-01   ph/cm2/s
              Error 6.96e-02 5.51e-02 5.85e-02 6.03e-02 1.15e-01 1.61e-01   ph/cm2/s
 
Fluence        Band 3.01e-07 3.97e-07 3.32e-07 4.49e-07 1.20e-06 1.49e-06   erg/cm2
              Error 3.65e-08 3.44e-08 4.91e-08 3.21e-07 1.09e-07 2.69e-07   erg/cm2
Peak flux      Band 1.99e-01 1.73e-01 7.53e-02 4.39e-02 4.68e-01 4.91e-01   ph/cm2/s
              Error 8.28e-02 5.14e-02 3.80e-02 4.49e-02 1.14e-01 1.30e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.164    0.140    -      -           1.24e-03 1.07e-04   44.352 57
CPL   1.994    0.000       1.3   13.4      1.58e-03 1.79e-04   44.274  0
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.925    0.457    -      -           3.23e-03 1.02e-03   45.398 57
CPL   1.321    2.523      41.3 5000.0      7.80e-03 2.10e+00   45.125  0
 
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: 65.344000 sec.
T50 in the 50-300 keV band: 32.000000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  105.624  -30.640   74.984
T90    78.480  -14.452   64.028
T50    31.684   12.760   44.444
Peak    1.000   31.988   32.988

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
   76.9092 +14.9498 0.0109    2.0   57.8       3.3362    17.5  TRIG_00153466       
------------------------------------------
 
Foreground time interval of the image:
-30.640  74.205 (delta_t = 104.845 [sec])
Background time interval of the image:
-60.000 -30.640 (delta_t =  29.360 [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  -30.640 sec. to   74.984 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.16380     ( -0.137886   0.142163 )
Norm@50keV  : 1.242884E-03    ( -1.075154E-04   1.058003E-04) )
------------------------------------------------------------
 Chi-Squared =      44.35246     using    59 PHA bins.
 Reduced chi-squared =     0.7781133     for     57 degrees of freedom
 Null hypothesis probability = 0.889
 
Photon flux (15-150 keV)    in 105.6 sec: 0.201927 ( -0.01352  0.013559 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.22808e-06 ( -9.2136e-08  9.35088e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  -30.640 sec. to   74.984 sec.
Parameters  : value       lower 90%   higher 90%
Photon index: 1.99399     (     )
Epeak [keV] : 1.31770      ( -0.725521 25.9953 )
Norm@50keV  : 1.583172E-03    ( -2.207113E-04   1.381050E-04) )
------------------------------------------------------------
 Chi-Squared =      44.27405     using    59 PHA bins.
 but latest trial   47.1411     gives Chi-Squared =   3.97136
 but latest trial  1.775702E-03 gives Chi-Squared =   10.1248
 Reduced chi-squared =     0.7906080     for     56 degrees of freedom
 Null hypothesis probability = 0.871
 
Photon flux (15-150 keV)    in 105.6 sec: 0.200464 ( -0.014894  0.014568 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.20992e-06 ( -1.2182e-07  1.06234e-07 ) ergs/cm2
 
Band function
Time interval is from  -30.640 sec. to   74.984 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.86380   ( -8.13620   6.86380 )
beta        : -9.19619    ( -7.72667   0.228333 )
Epeak [keV] : 18.8362      ( -17.2294 19.9054 )
Norm@50keV   : 1.842204E-03    ( -4.435008E-04   657.932 )
------------------------------------------------------------
 Chi-Squared =      44.45963     using    59 PHA bins.
 Reduced chi-squared =     0.8083569     for     55 degrees of freedom
 Null hypothesis probability = 0.844
 
Photon flux (15-150 keV)    in 105.6 sec: 0.198789 ( -0.014773  0.014685 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.19734e-06 ( -1.0842e-07  1.08905e-07 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from   31.988 sec. to   32.988 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.92522     ( -0.435081   0.478181 )
Norm@50keV  : 3.228752E-03    ( -1.035933E-03   9.958015E-04) )
------------------------------------------------------------
 Chi-Squared =      45.39761     using    59 PHA bins.
 Reduced chi-squared =     0.7964492     for     57 degrees of freedom
 Null hypothesis probability = 0.866
 
Photon flux (15-150 keV)    in 1.000 sec: 0.468367 ( -0.114187  0.114194 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.96787e-08 ( -8.8427e-09  9.4466e-09 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   31.988 sec. to   32.988 sec.
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.32129     ( -4.23496   0.811106 )
Epeak [keV] : 41.2692      ( -41.2592 9958.73 )
Norm@50keV  : 7.797058E-03    ( -7.797058E-03   4.19067 )
------------------------------------------------------------
 Chi-Squared =      45.12507     using    59 PHA bins.
 but latest trial   2.13240     gives Chi-Squared =  0.514946
 Reduced chi-squared =     0.8058048     for     56 degrees of freedom
 Null hypothesis probability = 0.851
 
Photon flux (15-150 keV)    in 1.000 sec: 0.459906 ( -0.118004  0.111833 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.71926e-08 ( -1.08348e-08  1.11606e-08 ) ergs/cm2
 
Band function
Time interval is from   31.988 sec. to   32.988 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.36489   ( -13.1824   1.81760 )
beta        : -9.31131    ( -1.30842   0.823158 )
Epeak [keV] : 41.6812      ( -26.2497 82.1570 )
Norm@50keV   : 7.325756E-03    ( -309.353   142.780 )
------------------------------------------------------------
 Chi-Squared =      45.12558     using    59 PHA bins.
 Reduced chi-squared =     0.8204651     for     55 degrees of freedom
 Null hypothesis probability = 0.826
 
Photon flux (15-150 keV)    in 1.000 sec: 0.468457 ( -0.115213  0.113741 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.81653e-08 ( -4.3278e-09  9.0809e-09 ) ergs/cm2
 
Plot creation:
Thu Jan 10 19:12:05 EST 2008