batgrbproduct Analysis for Trigger=276784

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Thu Dec 13 18:52:48 EST 2007
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger276784/GCN5_download_cron
======================================================================

  Trigger: 00276784      Segment: 000

  BAT Trigger Time: 199029864   [s; MET]
      Trigger Stop: 199030504   [s; MET]
               UTC: 2007-04-23T14:04:22.090840    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 315.901272562351   Dec: 45.7411322969335  [deg; J2000]

     Catalogged Source?: YES
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    7.44
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    7.44

  Flight Position:   [ source = BAT ]
    RA: 315.901272562351   Dec: 45.7411322969335  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 316.089915268731   Dec: 45.7207644587167  [deg; J2000]  
        { 21h 04m 21.6s , +45d 43' 14.8" }
         +/- 5.59803450839939 [arcmin] (estimated 90% radius based on SNR)
         +/- 4.48026482721205 [arcmin] (formal 1-sigma fit error)
    SNR: 2.5971446297161
    RA  =  21h  4m 21.6s  (316.089915 deg.)
    Dec =  45d 43' 15" (45.720764 deg.)
 
  Angular difference between Flight and Ground position is 7.994634 arcmin
 
  Partial Coding Fraction: 0.8046875    [ including projection effects ]

  Duration
     T90: 640 +/- 
        Measured from: 0
                   to: 640     [s; relative to TRIGTIME]
     T50: 640 +/- 
        Measured from: 0
                   to: 640     [s; relative to TRIGTIME]

    WARNING: battblocks failed.  Used TDRSS fore/background intervals

  Fluence
     Peak Flux  (peak 640 second)
        Measured from: 0     
                   to: 640     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0     
                   to: 640     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.057538   0.038159   0.039033   0.005345
           0.030973   0.030921   0.027468   0.024044 [error]
 Peak      0.057538   0.038159   0.039033   0.005345
           0.030973   0.030921   0.027468   0.024044 [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 7.75e-09 1.88e-08 3.60e-08 1.69e-07 9.75e-08 2.36e-07   erg/cm2
              Error 1.07e-08 1.70e-08 3.05e-08 9.27e-07 6.63e-08 9.35e-07   erg/cm2
Peak flux Power-law 7.51e-03 9.83e-03 9.44e-03 1.61e-02 3.21e-02 4.29e-02   ph/cm2/s
              Error 1.05e-02 9.08e-03 7.91e-03 6.58e-02 2.26e-02 6.03e-02   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 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      Band 7.49e-03 4.29e-02 0.00e+00 0.00e+00 0.00e+00 0.00e+00   ph/cm2/s
              Error 4.72e-02 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.059    2.744    -      -           2.78e-04 2.31e-04   43.462 57
CPL   0.975    0.000     528.9    0.0      3.13e-04 0.00e+00   43.493 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.059    2.744    -      -           2.78e-04 2.31e-04   43.462 57
CPL   0.975    0.000     528.9    0.0      3.13e-04 0.00e+00   43.493 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  640.000    0.000  640.000
T90   640.000    0.000  640.000
T50   640.000    0.000  640.000
Peak  640.000    0.000  640.000

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  316.0899 +45.7208 0.0737   29.2  177.8       0.1558     2.6  TRIG_00276784       
------------------------------------------
 
Foreground time interval of the image:
  0.000  33.090 (delta_t =  33.090 [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
Time interval is from    0.000 sec. to   33.090 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.05918     ( -4.05918   1.42869 )
Norm@50keV  : 2.780280E-04    ( -2.780280E-04   1.838730E-04) )
------------------------------------------------------------
 Chi-Squared =      43.46194     using    59 PHA bins.
 Reduced chi-squared =     0.7624903     for     57 degrees of freedom
 Null hypothesis probability = 0.907
 
Photon flux (15-150 keV)    in 33.09 sec: 3.213451E-02 ( -0.0222842  0.0228467 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.75033e-08 ( -6.55258e-08  6.71264e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to   33.090 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.975245     (     )
Epeak [keV] : 528.918      (   )
Norm@50keV  : 3.125240E-04    (     )
------------------------------------------------------------
 Chi-Squared =      43.49251     using    59 PHA bins.
 Reduced chi-squared =     0.7766520     for     56 degrees of freedom
 Null hypothesis probability = 0.889
 
Photon flux (15-150 keV)    in 33.09 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to   33.090 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.804962   ( -9.19504   5.80496 )
beta        : -1.06238    ( -8.93762   11.0624 )
Epeak [keV] : 86.0078      ( -85.9078 9913.99 )
Norm@50keV   : 4.653296E-04    ( -4.653296E-04   104.449 )
------------------------------------------------------------
 Chi-Squared =      43.46098     using    59 PHA bins.
 Reduced chi-squared =     0.7901996     for     55 degrees of freedom
 Null hypothesis probability = 0.869
 
Photon flux (15-150 keV)    in 33.09 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    0.000 sec. to   33.090 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.05918     ( -4.05918   1.42869 )
Norm@50keV  : 2.780280E-04    ( -2.780280E-04   1.838730E-04) )
------------------------------------------------------------
 Chi-Squared =      43.46194     using    59 PHA bins.
 Reduced chi-squared =     0.7624903     for     57 degrees of freedom
 Null hypothesis probability = 0.907
 
Photon flux (15-150 keV)    in 33.09 sec: 3.213451E-02 ( -0.0222842  0.0228467 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.75033e-08 ( -6.55258e-08  6.71264e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to   33.090 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.975245     (     )
Epeak [keV] : 528.918      (   )
Norm@50keV  : 3.125240E-04    (     )
------------------------------------------------------------
 Chi-Squared =      43.49251     using    59 PHA bins.
 Reduced chi-squared =     0.7766520     for     56 degrees of freedom
 Null hypothesis probability = 0.889
 
Photon flux (15-150 keV)    in 33.09 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to   33.090 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.804962   ( -9.19504   5.80496 )
beta        : -1.06238    ( -8.93762   11.0624 )
Epeak [keV] : 86.0078      ( -85.9078 9913.99 )
Norm@50keV   : 4.653296E-04    ( -4.653296E-04   104.449 )
------------------------------------------------------------
 Chi-Squared =      43.46098     using    59 PHA bins.
 Reduced chi-squared =     0.7901996     for     55 degrees of freedom
 Null hypothesis probability = 0.869
 
Photon flux (15-150 keV)    in 33.09 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 
Plot creation:
Thu Dec 13 18:56:17 EST 2007