batgrbproduct Analysis for Trigger=315710

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Thu Jul  3 00:33:07 EDT 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger315710/GCN5_download_cron
======================================================================

  Trigger: 00315710      Segment: 000

  BAT Trigger Time: 236692246.592   [s; MET]
      Trigger Stop: 236692247.104   [s; MET]
               UTC: 2008-07-02T11:50:43.681940    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 312.852867899564   Dec: 72.3078003909001  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    6.6
     Image Trigger?:     NO
     Rate S/N Ratio:     13.0384048104053  [ if not an image trigger ]
     Image S/N Ratio:    6.6

  Flight Position:   [ source = BAT ]
    RA: 312.852867899564   Dec: 72.3078003909001  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 313.086117260721   Dec: 72.2871417253539  [deg; J2000]  
        { 20h 52m 20.7s , +72d 17' 13.7" }
         +/- 3.20198581756443 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.21229276330512 [arcmin] (formal 1-sigma fit error)
    SNR: 5.76886877337146
 
  Angular difference between Flight and Ground position is 4.432361 arcmin
 
  Partial Coding Fraction: 0.8125    [ including projection effects ]

  Duration
     T90: 0.511999994516373 +/- 
        Measured from: 0
                   to: 0.511999994516373     [s; relative to TRIGTIME]
     T50: 0.511999994516373 +/- 
        Measured from: 0
                   to: 0.511999994516373     [s; relative to TRIGTIME]

    WARNING: battblocks failed.  Used TDRSS fore/background intervals

  Fluence
     Peak Flux  (peak 0.511999994516373 second)
        Measured from: -1.49011611938477e-08     
                   to: 0.511999979615211     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0     
                   to: 0.511999994516373     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.009296   0.020661   0.015981   0.001183
           0.004304   0.004667   0.004230   0.003598 [error]
 Peak      0.009296   0.020661   0.015981   0.001183
           0.004304   0.004667   0.004230   0.003598 [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 3.08e-09 6.64e-09 1.12e-08 4.36e-08 3.09e-08 6.55e-08   erg/cm2
              Error 1.48e-09 2.03e-09 3.90e-09 4.25e-08 9.89e-09 3.60e-08   erg/cm2
Peak flux Power-law 1.93e-01 2.27e-01 1.92e-01 2.74e-01 7.10e-01 8.86e-01   ph/cm2/s
              Error 9.41e-02 7.11e-02 6.47e-02 1.91e-01 2.03e-01 2.70e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.62e-09 7.47e-09 1.19e-08 1.11e-08 2.84e-08 3.30e-08   erg/cm2
              Error 1.67e-09 2.62e-09 4.69e-09 3.56e-08 1.06e-08 3.89e-08   erg/cm2
Peak flux Cutoff-PL 1.61e-01 2.52e-01 2.08e-01 9.36e-02 6.84e-01 7.14e-01   ph/cm2/s
              Error 1.06e-01 8.90e-02 7.76e-02 2.22e-01 2.07e-01 3.07e-01   ph/cm2/s
 
Fluence        Band 2.63e-09 7.75e-09 1.11e-08 2.85e-08 2.94e-08 4.69e-08   erg/cm2
              Error 1.66e-09 2.57e-09 4.73e-09 3.76e-08 7.77e-09 4.83e-08   erg/cm2
Peak flux      Band 1.61e-01 2.52e-01 2.08e-01 9.31e-02 6.84e-01 7.13e-01   ph/cm2/s
              Error 1.06e-01 8.90e-02 7.76e-02 2.14e-01 2.07e-01 3.07e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.243    0.471    -      -           6.01e-03 1.72e-03   55.620 57
CPL   0.164    1.924      84.6 4990.2      2.12e-02 2.53e-01   54.558  0
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.243    0.471    -      -           6.01e-03 1.72e-03   55.620 57
CPL   0.164    1.924      84.6 4990.2      2.12e-02 2.53e-01   54.558  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    0.512    0.000    0.512
T90     0.512    0.000    0.512
T50     0.512    0.000    0.512
Peak    0.512   -0.000    0.512

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  313.0861 +72.2871 0.0334   17.1  -98.2       0.0493     5.8  TRIG_00315710       
------------------------------------------
 
Foreground time interval of the image:
  0.000   0.512 (delta_t =   0.512 [sec])
Background time interval of the image:
-239.592  -6.592 (delta_t = 233.000 [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    0.512 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.24270     ( -0.476687   0.464548 )
Norm@50keV  : 6.010517E-03    ( -1.720254E-03   1.712049E-03) )
------------------------------------------------------------
 Chi-Squared =      55.61976     using    59 PHA bins.
 Reduced chi-squared =     0.9757853     for     57 degrees of freedom
 Null hypothesis probability = 0.527
 
Photon flux (15-150 keV)    in 0.5120 sec: 0.710050 ( -0.20316  0.20364 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.08727e-08 ( -9.74925e-09  1.00288e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to    0.512 sec.
Parameters  : value       lower 90%   higher 90%
Photon index: 0.164403     ( -2.70333   1.14467 )
Epeak [keV] : 84.5551      ( -64.9082 9915.45 )
Norm@50keV  : 2.124553E-02    ( -1.655595E-02   0.488502 )
------------------------------------------------------------
 Chi-Squared =      54.55761     using    59 PHA bins.
 but latest trial   1.92469     gives Chi-Squared =   6.49387
 but latest trial   32.4605     gives Chi-Squared =   2.36921
 Reduced chi-squared =     0.9742430     for     56 degrees of freedom
 Null hypothesis probability = 0.530
 
Photon flux (15-150 keV)    in 0.5120 sec: 0.684394 ( -0.206353  0.20749 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.83731e-08 ( -1.02506e-08  1.08782e-08 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to    0.512 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.161072   ( -1.43790   2.35129 )
beta        : -8.88589    ( -1.11411   8.01107 )
Epeak [keV] : 84.3990      ( -46.3798 9915.60 )
Norm@50keV   : 2.133816E-02    ( -1.664768E-02   0.491884 )
------------------------------------------------------------
 Chi-Squared =      54.55760     using    59 PHA bins.
 Reduced chi-squared =     0.9919564     for     55 degrees of freedom
 Null hypothesis probability = 0.491
 
Photon flux (15-150 keV)    in 0.5120 sec: 0.684055 ( -0.206566  0.208207 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.93866e-08 ( -1.02572e-08  5.28881e-09 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    0.000 sec. to    0.512 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.24270     ( -0.476687   0.464548 )
Norm@50keV  : 6.010517E-03    ( -1.720254E-03   1.712049E-03) )
------------------------------------------------------------
 Chi-Squared =      55.61976     using    59 PHA bins.
 Reduced chi-squared =     0.9757853     for     57 degrees of freedom
 Null hypothesis probability = 0.527
 
Photon flux (15-150 keV)    in 0.5120 sec: 0.710050 ( -0.20316  0.20364 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.08727e-08 ( -9.74925e-09  1.00288e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to    0.512 sec.
Parameters  : value       lower 90%   higher 90%
Photon index: 0.164403     ( -2.70333   1.14467 )
Epeak [keV] : 84.5551      ( -64.9082 9915.45 )
Norm@50keV  : 2.124553E-02    ( -1.655595E-02   0.488502 )
------------------------------------------------------------
 Chi-Squared =      54.55761     using    59 PHA bins.
 but latest trial   1.92469     gives Chi-Squared =   6.49387
 but latest trial   32.4605     gives Chi-Squared =   2.36921
 Reduced chi-squared =     0.9742430     for     56 degrees of freedom
 Null hypothesis probability = 0.530
 
Photon flux (15-150 keV)    in 0.5120 sec: 0.684394 ( -0.206353  0.20749 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.83731e-08 ( -1.02506e-08  1.08782e-08 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to    0.512 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.161072   ( -1.43790   2.35129 )
beta        : -8.88589    ( -1.11411   8.01107 )
Epeak [keV] : 84.3990      ( -46.3798 9915.60 )
Norm@50keV   : 2.133816E-02    ( -1.664768E-02   0.491884 )
------------------------------------------------------------
 Chi-Squared =      54.55760     using    59 PHA bins.
 Reduced chi-squared =     0.9919564     for     55 degrees of freedom
 Null hypothesis probability = 0.491
 
Photon flux (15-150 keV)    in 0.5120 sec: 0.684055 ( -0.206566  0.208207 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.93866e-08 ( -1.02572e-08  5.28881e-09 ) ergs/cm2
 
Plot creation:
Thu Jul  3 01:00:52 EDT 2008