batgrbproduct Analysis for Trigger=306721

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Wed Mar 19 09:29:44 EDT 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger306721/GCN5_download_cron
======================================================================

  Trigger: 00306721      Segment: 000

  BAT Trigger Time: 227556490.816   [s; MET]
      Trigger Stop: 227556491.84   [s; MET]
               UTC: 2008-03-18T18:08:08.163480    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 41.2861989781123   Dec: 5.3635439317828  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    5.92
     Image Trigger?:     NO
     Rate S/N Ratio:     26.1916017074176  [ if not an image trigger ]
     Image S/N Ratio:    5.92

  Flight Position:   [ source = BAT ]
    RA: 41.2861989781123   Dec: 5.3635439317828  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 41.2887678268598   Dec: 5.48801743161736  [deg; J2000]  
        { 02h 45m 09.3s , +05d 29' 16.9" }
         +/- 3.70977992394704 [arcmin] (estimated 90% radius based on SNR)
         +/- 2.93484689274464 [arcmin] (formal 1-sigma fit error)
    SNR: 4.67480914331059
    RA  =   2h 45m  9.3s  (41.288768 deg.)
    Dec =    5d 29' 17" (5.488017 deg.)
 
  Angular difference between Flight and Ground position is 7.469986 arcmin
 
  Partial Coding Fraction: 0.9296875    [ including projection effects ]

  Duration
     T90: 1.02399998903275 +/- 
        Measured from: 0
                   to: 1.02399998903275     [s; relative to TRIGTIME]
     T50: 1.02399998903275 +/- 
        Measured from: 0
                   to: 1.02399998903275     [s; relative to TRIGTIME]

    WARNING: battblocks failed.  Used TDRSS fore/background intervals

  Fluence
     Peak Flux  (peak 1.02399998903275 second)
        Measured from: 0     
                   to: 1.02399998903275     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0     
                   to: 1.02399998903275     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total    -0.000339   0.005419   0.015448   0.030591
           0.005429   0.006036   0.006011   0.007134 [error]
 Peak     -0.000339   0.005419   0.015448   0.030591
           0.005429   0.006036   0.006011   0.007134 [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 4.21e-10 2.21e-09 9.95e-09 1.81e-07 3.06e-08 1.92e-07   erg/cm2
              Error 8.87e-10 2.60e-09 7.75e-09 3.35e-07 1.57e-08 3.38e-07   erg/cm2
Peak flux Power-law 1.28e-02 3.57e-02 8.04e-02 4.82e-01 2.17e-01 6.11e-01   ph/cm2/s
              Error 2.75e-02 4.33e-02 6.33e-02 7.80e-01 1.74e-01 6.88e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.84e-10 1.93e-09 1.12e-08 7.29e-08 3.13e-08 7.13e-08   erg/cm2
              Error 8.67e-10 2.63e-09 7.72e-09 3.61e-07 2.39e-08 3.65e-07   erg/cm2
Peak flux Cutoff-PL 1.28e-02 3.57e-02 8.05e-02 4.80e-01 2.17e-01 6.09e-01   ph/cm2/s
              Error 2.75e-02 4.33e-02 6.34e-02 8.40e-01 1.74e-01 7.47e-01   ph/cm2/s
 
Fluence        Band 2.38e-10 1.93e-09 1.12e-08 7.66e-08 3.13e-08 1.24e-07   erg/cm2
              Error 8.58e-10 2.62e-09 7.95e-09 3.35e-07 2.39e-08 2.53e-07   erg/cm2
Peak flux      Band 6.67e-03 3.04e-02 8.98e-02 2.47e-01 2.15e-01 3.74e-01   ph/cm2/s
              Error 2.68e-02 4.34e-02 6.27e-02 8.90e-01 1.72e-01 7.89e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL   -0.171    1.966    -      -           1.50e-03 1.44e-03   46.446 57
CPL  -1.440    3.948     220.9 5000.0      3.31e-03 1.09e-02   46.326  0
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL   -0.171    1.966    -      -           1.50e-03 1.44e-03   46.446 57
CPL  -1.440    3.948     220.9 5000.0      3.31e-03 1.09e-02   46.326  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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    1.024    0.000    1.024
T90     1.024    0.000    1.024
T50     1.024    0.000    1.024
Peak    1.024    0.000    1.024

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
   41.2888  +5.4880 0.0414   25.5  -21.6       0.0609     4.7  TRIG_00306721       
------------------------------------------
 
Foreground time interval of the image:
  0.000   1.024 (delta_t =   1.024 [sec])
Background time interval of the image:
-21.515 -10.816 (delta_t =  10.699 [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    0.000 sec. to    1.024 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.171128     ( -2.82887   1.10244 )
Norm@50keV  : 1.502643E-03    ( -1.502643E-03   1.374733E-03) )
------------------------------------------------------------
 Chi-Squared =      46.44625     using    59 PHA bins.
 Reduced chi-squared =     0.8148466     for     57 degrees of freedom
 Null hypothesis probability = 0.840
 
Photon flux (15-150 keV)    in 1.024 sec: 0.216754 ( -0.216754  0.130401 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.06392e-08 ( -1.57122e-08  1.57372e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to    1.024 sec.
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.43966     ( -1.56034   6.33645 )
Epeak [keV] : 220.900      ( -220.890 9779.10 )
Norm@50keV  : 3.314648E-03    ( -3.314648E-03   1.853102E-02) )
------------------------------------------------------------
 Chi-Squared =      46.32592     using    59 PHA bins.
 but latest trial   3.14997     gives Chi-Squared =   1.82767
 Reduced chi-squared =     0.8272486     for     56 degrees of freedom
 Null hypothesis probability = 0.818
 
Photon flux (15-150 keV)    in 1.024 sec: 0.216827 ( -0.216827  0.130297 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.12827e-08 ( -3.12827e-08  1.64575e-08 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to    1.024 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.234788   ( -14.9999   5.817413E-05) )
beta        : 0.170896    ( -0.735985   9.82921 )
Epeak [keV] : 26.3395      ( -26.2410 9973.66 )
Norm@50keV   : 2.089464E-03    ( -4.48996   14962.1 )
------------------------------------------------------------
 Chi-Squared =      46.44625     using    59 PHA bins.
 Reduced chi-squared =     0.8444773     for     55 degrees of freedom
 Null hypothesis probability = 0.787
 
Photon flux (15-150 keV)    in 1.024 sec: 0.215007 ( -0.215007  0.129281 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.1283e-08 ( -3.1283e-08  1.64588e-08 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    0.000 sec. to    1.024 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.171128     ( -2.82887   1.10244 )
Norm@50keV  : 1.502643E-03    ( -1.502643E-03   1.374733E-03) )
------------------------------------------------------------
 Chi-Squared =      46.44625     using    59 PHA bins.
 Reduced chi-squared =     0.8148466     for     57 degrees of freedom
 Null hypothesis probability = 0.840
 
Photon flux (15-150 keV)    in 1.024 sec: 0.216754 ( -0.216754  0.130401 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.06392e-08 ( -1.57122e-08  1.57372e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to    1.024 sec.
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.43966     ( -1.56034   6.33645 )
Epeak [keV] : 220.900      ( -220.890 9779.10 )
Norm@50keV  : 3.314648E-03    ( -3.314648E-03   1.853102E-02) )
------------------------------------------------------------
 Chi-Squared =      46.32592     using    59 PHA bins.
 but latest trial   3.14997     gives Chi-Squared =   1.82767
 Reduced chi-squared =     0.8272486     for     56 degrees of freedom
 Null hypothesis probability = 0.818
 
Photon flux (15-150 keV)    in 1.024 sec: 0.216827 ( -0.216827  0.130297 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.12827e-08 ( -3.12827e-08  1.64575e-08 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to    1.024 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.234788   ( -14.9999   5.817413E-05) )
beta        : 0.170896    ( -0.735985   9.82921 )
Epeak [keV] : 26.3395      ( -26.2410 9973.66 )
Norm@50keV   : 2.089464E-03    ( -4.48996   14962.1 )
------------------------------------------------------------
 Chi-Squared =      46.44625     using    59 PHA bins.
 Reduced chi-squared =     0.8444773     for     55 degrees of freedom
 Null hypothesis probability = 0.787
 
Photon flux (15-150 keV)    in 1.024 sec: 0.215007 ( -0.215007  0.129281 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.1283e-08 ( -3.1283e-08  1.64588e-08 ) ergs/cm2
 
Plot creation:
Wed Mar 19 09:48:23 EDT 2008