batgrbproduct Analysis for Trigger=321177

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Fri Aug 22 19:39:59 EDT 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger321177/GCN5_download_cron
======================================================================

  Trigger: 00321177      Segment: 000

  BAT Trigger Time: 241103575.736   [s; MET]
      Trigger Stop: 241103575.752   [s; MET]
               UTC: 2008-08-22T13:12:52.697440    [includes UTCF correction] 
       Where From?: (*SHORT BURST*) TDRSS scaled map message

  BAT 
    RA: 75.2646438449587   Dec: 45.2722548248199  [deg; J2000]

     Catalogged Source?: YES
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    17.45
     Image Trigger?:     NO
     Rate S/N Ratio:     117.520211027721  [ if not an image trigger ]
     Image S/N Ratio:    17.45

  Flight Position:   [ source = BAT ]
    RA: 75.2646438449587   Dec: 45.2722548248199  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 75.2766899208677   Dec: 45.2685350372454  [deg; J2000]  
        { 05h 01m 06.4s , +45d 16' 06.7" }
         +/- 1.0119073300246 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.381207991667399 [arcmin] (formal 1-sigma fit error)
    SNR: 29.9071110314566
 
  Angular difference between Flight and Ground position is 0.555465 arcmin
 
  Partial Coding Fraction: 1.015625    [ including projection effects ]

  Duration
     T90: 0.0720000267028809 +/- 0.017888553416166
        Measured from: -0.00399991869926453
                   to: 0.0680001080036163     [s; relative to TRIGTIME]
     T50: 0.0360000133514404 +/- 0.00400000810623169
        Measured from: 0.00400009751319885
                   to: 0.0400001108646393     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.472000002861023     
                   to: 0.527999997138977     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.0279999971389771     
                   to: 0.0800000131130219     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.081947   0.072389   0.025144   0.002117
           0.003844   0.003648   0.002588   0.001301 [error]
 Peak      0.083154   0.072263   0.025278   0.001839
           0.003877   0.003670   0.002609   0.001325 [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 2.80e-08 1.67e-08 6.34e-09 3.21e-09 5.27e-08 5.42e-08   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 Power-law 8.44e+00 2.84e+00 5.38e-01 1.19e-01 1.19e+01 1.19e+01   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   Cutoff-PL 2.15e-08 3.19e-08 1.31e-08 8.84e-10 6.73e-08 6.71e-08   erg/cm2
              Error 2.46e-09 2.32e-09 1.84e-09 3.38e-10 4.25e-09 4.27e-09   erg/cm2
Peak flux Cutoff-PL 8.44e+00 2.84e+00 5.38e-01 1.19e-01 1.19e+01 1.19e+01   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 2.12e-08 3.17e-08 1.31e-08 8.95e-10 6.72e-08 6.15e-08   erg/cm2
              Error 1.82e-09 2.13e-09 1.26e-09 2.20e-10 4.18e-09 3.86e-09   erg/cm2
Peak flux      Band 6.28e+00 5.29e+00 1.14e+00 3.75e-02 1.26e+01 1.27e+01   ph/cm2/s
              Error 8.25e-01 3.33e-01 1.36e-01 9.12e-03 7.95e-01 8.62e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    3.396    0.000    -      -           3.30e-02 0.00e+00  239.859 57
CPL   0.044    0.491      29.6    3.3      2.25e+00 1.49e+00   69.282 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    3.402    0.000    -      -           3.18e-02 0.00e+00  242.556 57
CPL   0.044    0.490      29.5    3.3      2.20e+00 1.45e+00   70.457 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: 0.064000 sec.
T50 in the 50-300 keV band: 0.064000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    0.108   -0.028    0.080
T90     0.072   -0.004    0.068
T50     0.036    0.004    0.040
Peak    1.000   -0.472    0.528

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
   75.2767 +45.2685 0.0064    0.0 -104.2       0.1795    29.9  TRIG_00321177       
------------------------------------------
 
Foreground time interval of the image:
 -0.028   0.080 (delta_t =   0.108 [sec])
Background time interval of the image:
-119.736 -78.466 (delta_t =  41.270 [sec])
-77.736  -0.028 (delta_t =  77.708 [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   -0.028 sec. to    0.080 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 3.39566     (     )
Norm@50keV  : 3.298196E-02    (     )
------------------------------------------------------------
 Chi-Squared =      239.8594     using    59 PHA bins.
 Reduced chi-squared =      4.208060     for     57 degrees of freedom
 Null hypothesis probability = 2.747E-24
 
Photon flux (15-150 keV)    in 0.1080 sec: 12.2679 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.26559e-08 ( 0  0 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.028 sec. to    0.080 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 4.352782E-02     ( -0.513707   0.467578 )
Epeak [keV] : 29.6295      ( -3.61019 3.08031 )
Norm@50keV  : 2.25415    ( -0.971299   2.00359 )
------------------------------------------------------------
 Chi-Squared =      69.28181     using    59 PHA bins.
 Reduced chi-squared =      1.237175     for     56 degrees of freedom
 Null hypothesis probability = 0.109
 
Photon flux (15-150 keV)    in 0.1080 sec: 13.0130 ( -0.8851  0.8905 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.72691e-08 ( -4.2565e-09  4.24958e-09 ) ergs/cm2
 
Band function
Time interval is from   -0.028 sec. to    0.080 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.50189   ( -3.305554E-02   7.319939E-02) )
beta        : -9.35593    (     )
Epeak [keV] : 13.1722      (   )
Norm@50keV   : 0.406076    (     )
------------------------------------------------------------
 Chi-Squared =      98.79076     using    59 PHA bins.
 Reduced chi-squared =      1.796196     for     55 degrees of freedom
 Null hypothesis probability = 2.671E-04
 
Photon flux (15-150 keV)    in 0.1080 sec: 13.0456 ( -0.9172  0.8142 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.71685e-08 ( -4.20984e-09  4.1445e-09 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from   -0.028 sec. to    0.084 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 3.40169     (     )
Norm@50keV  : 3.182993E-02    (     )
------------------------------------------------------------
 Chi-Squared =      242.5557     using    59 PHA bins.
 Reduced chi-squared =      4.255363     for     57 degrees of freedom
 Null hypothesis probability = 9.670E-25
 
Photon flux (15-150 keV)    in 0.1120 sec: 11.8939 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.28898e-08 ( 0  0 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.028 sec. to    0.084 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 4.420604E-02     ( -0.512569   0.467354 )
Epeak [keV] : 29.5385      ( -3.60850 3.07410 )
Norm@50keV  : 2.20317    ( -0.949568   1.95443 )
------------------------------------------------------------
 Chi-Squared =      70.45722     using    59 PHA bins.
 Reduced chi-squared =      1.258165     for     56 degrees of freedom
 Null hypothesis probability = 9.253E-02
 
Photon flux (15-150 keV)    in 0.1120 sec: 11.8949 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.77422e-08 ( -4.28299e-09  4.28142e-09 ) ergs/cm2
 
Band function
Time interval is from   -0.028 sec. to    0.084 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.48967   ( -2.976251E-02   8.630371E-02) )
beta        : -9.27526    ( -0.724736   3.83135 )
Epeak [keV] : 13.4809      ( -3.04380 3.76041 )
Norm@50keV   : 0.398042    ( -0.803044   2.15551 )
------------------------------------------------------------
 Chi-Squared =      99.52627     using    59 PHA bins.
 Reduced chi-squared =      1.809569     for     55 degrees of freedom
 Null hypothesis probability = 2.235E-04
 
Photon flux (15-150 keV)    in 0.1120 sec: 12.5667 ( -0.8121  0.7779 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.59991e-08 ( -4.08173e-09  4.07758e-09 ) ergs/cm2
 
Plot creation:
Fri Aug 22 19:55:32 EDT 2008