batgrbproduct Analysis for Trigger=296491

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Fri Dec 14 22:57:11 EST 2007
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger296491/GCN5_download_cron
======================================================================

  Trigger: 00296491      Segment: 000

  BAT Trigger Time: 216571901.632   [s; MET]
      Trigger Stop: 216571902.656   [s; MET]
               UTC: 2007-11-12T14:51:39.275140    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 297.441990896559   Dec: -50.3379015898847  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    6.7
     Image Trigger?:     NO
     Rate S/N Ratio:     14.0356688476182  [ if not an image trigger ]
     Image S/N Ratio:    6.7

  Flight Position:   [ source = BAT ]
    RA: 297.441990896559   Dec: -50.3379015898847  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 297.445785124918   Dec: -50.3464283933739  [deg; J2000]  
        { 19h 49m 47.0s , -50d 20' 47.1" }
         +/- 3.7095342099465 [arcmin] (estimated 90% radius based on SNR)
         +/- 2.44198416250723 [arcmin] (formal 1-sigma fit error)
    SNR: 4.67525151011665
    RA  =  19h 49m 47.0s  (297.445785 deg.)
    Dec = -50d 20' 47" (-50.346428 deg.)
 
  Angular difference between Flight and Ground position is 0.531838 arcmin
 
  Partial Coding Fraction: 0.3945312    [ 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     0.041362   0.031242  -0.004631   0.005836
           0.010002   0.009495   0.008458   0.008916 [error]
 Peak      0.041362   0.031242  -0.004631   0.005836
           0.010002   0.009495   0.008458   0.008916 [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 1.73e-08 1.15e-08 5.03e-09 2.99e-09 3.53e-08 3.69e-08   erg/cm2
              Error 6.06e-09 5.53e-09 5.50e-09 5.99e-09 1.43e-08 1.70e-08   erg/cm2
Peak flux Power-law 5.65e-01 2.12e-01 4.62e-02 1.20e-02 8.31e-01 8.35e-01   ph/cm2/s
              Error 2.02e-01 9.76e-02 4.34e-02 2.27e-02 2.71e-01 2.74e-01   ph/cm2/s
 
Fluence   Cutoff-PL 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   erg/cm2
              Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   erg/cm2
Peak flux Cutoff-PL 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   ph/cm2/s
              Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   ph/cm2/s
 
Fluence        Band 1.64e-08 1.39e-08 2.94e-09 1.01e-10 3.36e-08 3.50e-08   erg/cm2
              Error 6.61e-09 4.42e-09 3.85e-09 4.59e-09 1.11e-08 0.00e+00   erg/cm2
Peak flux      Band 4.89e-01 2.74e-01 1.33e-02 5.09e-05 7.76e-01 7.76e-01   ph/cm2/s
              Error 2.70e-01 1.45e-01 4.87e-02 1.47e-02 2.51e-01 2.51e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    3.201    0.913    -      -           2.60e-03 2.34e-03   63.082 57
CPL   1.083    0.000      14.0    0.0      6.86e-02 0.00e+00   62.000 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    3.201    0.913    -      -           2.60e-03 2.34e-03   63.082 57
CPL   1.083    0.000      14.0    0.0      6.86e-02 0.00e+00   62.000 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    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
  297.4458 -50.3464 0.0412   47.1 -168.9       0.0896     4.7  TRIG_00296491       
------------------------------------------
 
Foreground time interval of the image:
  0.000   1.024 (delta_t =   1.024 [sec])
Background time interval of the image:
-30.731  -5.632 (delta_t =  25.099 [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: 3.20082     ( -0.738074   1.08858 )
Norm@50keV  : 2.598771E-03    ( -2.598771E-03   2.085355E-03) )
------------------------------------------------------------
 Chi-Squared =      63.08225     using    59 PHA bins.
 Reduced chi-squared =      1.106706     for     57 degrees of freedom
 Null hypothesis probability = 0.270
 
Photon flux (15-150 keV)    in 1.024 sec: 0.830793 ( -0.270887  0.271677 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.53049e-08 ( -1.34787e-08  1.51623e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to    1.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.08322     (     )
Epeak [keV] : 13.9884      (   )
Norm@50keV  : 6.861714E-02    (     )
------------------------------------------------------------
 Chi-Squared =      61.99984     using    59 PHA bins.
 Reduced chi-squared =      1.107140     for     56 degrees of freedom
 Null hypothesis probability = 0.271
 
Photon flux (15-150 keV)    in 1.024 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) 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       : -1.64271   ( -8.35729   0.965816 )
beta        : -8.39508    ( -1.60492   18.3951 )
Epeak [keV] : 9.42622      ( -9.40612 48.5859 )
Norm@50keV   : 2.233886E-02    ( -2.952422E-02   671708. )
------------------------------------------------------------
 Chi-Squared =      62.39657     using    59 PHA bins.
 Reduced chi-squared =      1.134483     for     55 degrees of freedom
 Null hypothesis probability = 0.230
 
Photon flux (15-150 keV)    in 1.024 sec: 0.776377 ( -0.250865  0.250983 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.3614e-08 ( -1.1588e-08  1.06692e-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: 3.20082     ( -0.738074   1.08858 )
Norm@50keV  : 2.598771E-03    ( -2.598771E-03   2.085355E-03) )
------------------------------------------------------------
 Chi-Squared =      63.08225     using    59 PHA bins.
 Reduced chi-squared =      1.106706     for     57 degrees of freedom
 Null hypothesis probability = 0.270
 
Photon flux (15-150 keV)    in 1.024 sec: 0.830793 ( -0.270887  0.271677 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.53049e-08 ( -1.34787e-08  1.51623e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to    1.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.08322     (     )
Epeak [keV] : 13.9884      (   )
Norm@50keV  : 6.861714E-02    (     )
------------------------------------------------------------
 Chi-Squared =      61.99984     using    59 PHA bins.
 Reduced chi-squared =      1.107140     for     56 degrees of freedom
 Null hypothesis probability = 0.271
 
Photon flux (15-150 keV)    in 1.024 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) 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       : -1.64271   ( -8.35729   0.965816 )
beta        : -8.39508    ( -1.60492   18.3951 )
Epeak [keV] : 9.42622      ( -9.40612 48.5859 )
Norm@50keV   : 2.233886E-02    ( -2.952422E-02   671708. )
------------------------------------------------------------
 Chi-Squared =      62.39657     using    59 PHA bins.
 Reduced chi-squared =      1.134483     for     55 degrees of freedom
 Null hypothesis probability = 0.230
 
Photon flux (15-150 keV)    in 1.024 sec: 0.776377 ( -0.250865  0.250983 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.3614e-08 ( -1.1588e-08  1.06692e-08 ) ergs/cm2
 
Plot creation:
Fri Dec 14 23:22:05 EST 2007