batgrbproduct Analysis for Trigger=302454

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Tue Feb  5 00:23:44 EST 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger302454/GCN5_download_cron
======================================================================

  Trigger: 00302454      Segment: 000

  BAT Trigger Time: 223807480   [s; MET]
      Trigger Stop: 223807800   [s; MET]
               UTC: 2008-02-04T08:44:37.449920    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 267.301432208749   Dec: -26.6290428753778  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    8.5
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    8.5

  Flight Position:   [ source = BAT ]
    RA: 267.301432208749   Dec: -26.6290428753778  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 267.328496182972   Dec: -26.6476820377467  [deg; J2000]  
        { 17h 49m 18.8s , -26d 38' 51.7" }
         +/- 3.31187825524826 [arcmin] (estimated 90% radius based on SNR)
         +/- 2.29947373041398 [arcmin] (formal 1-sigma fit error)
    SNR: 5.49737044471536
    RA  =  17h 49m 18.8s  (267.328496 deg.)
    Dec = -26d 38' 52" (-26.647682 deg.)
 
  Angular difference between Flight and Ground position is 1.832344 arcmin
 
  Partial Coding Fraction: 0.890625    [ including projection effects ]

  Duration
     T90: 320 +/- 
        Measured from: 0
                   to: 320     [s; relative to TRIGTIME]
     T50: 320 +/- 
        Measured from: 0
                   to: 320     [s; relative to TRIGTIME]

    WARNING: battblocks failed.  Used TDRSS fore/background intervals

  Fluence
     Peak Flux  (peak 320 second)
        Measured from: 0     
                   to: 320     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0     
                   to: 320     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.992197   0.334001  -0.056894  -0.040344
           0.114428   0.104918   0.093642   0.086259 [error]
 Peak      0.992197   0.334001  -0.056894  -0.040344
           0.114428   0.104918   0.093642   0.086259 [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 3.28e-07 1.47e-07 3.97e-08 1.32e-08 5.23e-07 5.28e-07   erg/cm2
              Error 6.28e-08 5.52e-08 3.21e-08 2.02e-08 1.25e-07 1.32e-07   erg/cm2
Peak flux Power-law 3.50e-02 8.95e-03 1.21e-03 1.83e-04 4.52e-02 4.53e-02   ph/cm2/s
              Error 6.78e-03 3.19e-03 1.19e-03 2.83e-04 8.78e-03 8.81e-03   ph/cm2/s
 
Fluence   Cutoff-PL 3.63e-07 1.05e-07 6.42e-10 3.15e-15 4.69e-07 4.70e-07   erg/cm2
              Error 7.04e-08 6.38e-08 1.77e-08 2.47e-09 9.85e-08 9.85e-08   erg/cm2
Peak flux Cutoff-PL 3.80e-02 6.93e-03 2.27e-05 5.56e-11 4.50e-02 4.50e-02   ph/cm2/s
              Error 7.50e-03 3.77e-03 5.52e-04 3.88e-05 8.31e-03 8.33e-03   ph/cm2/s
 
Fluence        Band 3.21e-07 1.59e-07 4.68e-08 1.68e-08 5.28e-07 5.79e-07   erg/cm2
              Error 6.04e-08 3.54e-08 1.11e-07 1.22e-07 0.00e+00 0.00e+00   erg/cm2
Peak flux      Band 3.59e-02 8.90e-03 5.01e-04 9.89e-06 4.53e-02 4.53e-02   ph/cm2/s
              Error 6.82e-03 3.67e-03 8.32e-04 1.84e-04 8.53e-03 8.45e-03   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    3.904    0.650    -      -           7.96e-05 6.93e-05   53.396 57
CPL  -0.330    0.000      12.4    9.2      1.94e-01 2.83e+01   50.453 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    3.904    0.650    -      -           7.96e-05 6.93e-05   53.396 57
CPL  -0.330    0.000      12.4    9.2      1.94e-01 2.83e+01   50.453 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  320.000    0.000  320.000
T90   320.000    0.000  320.000
T50   320.000    0.000  320.000
Peak  320.000    0.000  320.000

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  267.3285 -26.6477 0.0345   26.8  -16.4       1.6699     5.5  TRIG_00302454       
------------------------------------------
 
Foreground time interval of the image:
  0.000 127.470 (delta_t = 127.470 [sec])
129.000 320.000 (delta_t = 191.000 [sec])
Background time interval of the image:

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
0.000000 127.470000
129.000000 320.000000
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 3.90430     ( -0.602718   0.697921 )
Norm@50keV  : 7.964416E-05    ( -7.964416E-05   5.903347E-05) )
------------------------------------------------------------
 Chi-Squared =      53.39557     using    59 PHA bins.
 Reduced chi-squared =     0.9367643     for     57 degrees of freedom
 Null hypothesis probability = 0.611
 
Photon flux (15-150 keV)    in 318.5 sec: 4.524140E-02 ( -0.00875855  0.00879621 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.23069e-07 ( -1.19727e-07  1.30843e-07 ) ergs/cm2
 
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
0.000000 127.470000
129.000000 320.000000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.330308     (     )
Epeak [keV] : 12.3876      ( -15.7745 2.68257 )
Norm@50keV  : 0.193722    ( -14.7029   41.9031 )
------------------------------------------------------------
 Chi-Squared =      50.45348     using    59 PHA bins.
 Reduced chi-squared =     0.9009551     for     56 degrees of freedom
 Null hypothesis probability = 0.684
 
Photon flux (15-150 keV)    in 318.5 sec: 4.501104E-02 ( -0.00830712  0.00830362 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.69055e-07 ( -9.14732e-08  1.05551e-07 ) ergs/cm2
 
Band function
Multiple GTIs in the spectrum
tstart tstop
0.000000 127.470000
129.000000 320.000000
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.55068   ( -5.24537   2.27158 )
beta        : -8.74884    ( -0.708775   13.8932 )
Epeak [keV] : 11.3286      ( -11.2286 9988.67 )
Norm@50keV   : 1.279182E-03    ( -1.093761E-02   7.910790E-03) )
------------------------------------------------------------
 Chi-Squared =      64.86935     using    59 PHA bins.
 Reduced chi-squared =      1.179443     for     55 degrees of freedom
 Null hypothesis probability = 0.170
 
Photon flux (15-150 keV)    in 318.5 sec: 4.532995E-02 ( -0.00854037  0.00850997 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.28134e-07 ( -9.95854e-08  1.22785e-07 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from  129.000 sec. to  320.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 3.90430     ( -0.602718   0.697921 )
Norm@50keV  : 7.964416E-05    ( -7.964416E-05   5.903347E-05) )
------------------------------------------------------------
 Chi-Squared =      53.39557     using    59 PHA bins.
 Reduced chi-squared =     0.9367643     for     57 degrees of freedom
 Null hypothesis probability = 0.611
 
Photon flux (15-150 keV)    in 318.5 sec: 4.524140E-02 ( -0.00875855  0.00879621 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.23069e-07 ( -1.19727e-07  1.30843e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  129.000 sec. to  320.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.330308     (     )
Epeak [keV] : 12.3876      ( -15.7745 2.68257 )
Norm@50keV  : 0.193722    ( -14.7029   41.9031 )
------------------------------------------------------------
 Chi-Squared =      50.45348     using    59 PHA bins.
 Reduced chi-squared =     0.9009551     for     56 degrees of freedom
 Null hypothesis probability = 0.684
 
Photon flux (15-150 keV)    in 318.5 sec: 4.501104E-02 ( -0.00830712  0.00830362 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.69055e-07 ( -9.14732e-08  1.05551e-07 ) ergs/cm2
 
Band function
Time interval is from  129.000 sec. to  320.000 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.55068   ( -5.24537   2.27158 )
beta        : -8.74884    ( -0.708775   0.591707 )
Epeak [keV] : 11.3286      ( -11.2286 9988.67 )
Norm@50keV   : 1.279182E-03    ( -1.093761E-02   7.910790E-03) )
------------------------------------------------------------
 Chi-Squared =      64.86935     using    59 PHA bins.
 Reduced chi-squared =      1.179443     for     55 degrees of freedom
 Null hypothesis probability = 0.170
 
Photon flux (15-150 keV)    in 318.5 sec: 4.532995E-02 ( -0.00854037  0.00850997 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.28134e-07 ( -9.95854e-08  1.22785e-07 ) ergs/cm2
 
Plot creation:
Tue Feb  5 00:50:15 EST 2008