batgrbproduct Analysis for Trigger=148522

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Tue Jan  8 14:28:01 EST 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger148522/SDC
======================================================================

  Trigger: 00148522      Segment: 000

  BAT Trigger Time: 144613681.728   [s; MET]
      Trigger Stop: 144613682.24   [s; MET]
               UTC: 2005-08-01T18:28:02.075720    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 204.139119695272   Dec: -21.9501095764615  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    10.25
     Image Trigger?:     NO
     Rate S/N Ratio:     19.672315572906  [ if not an image trigger ]
     Image S/N Ratio:    10.25

  Flight Position:   [ source = BAT ]
    RA: 204.139119695272   Dec: -21.9501095764615  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 204.14480142208   Dec: -21.9342134724728  [deg; J2000]  
        { 13h 36m 34.8s , -21d 56' 03.2" }
         +/- 1.57749244718064 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.655656173616861 [arcmin] (formal 1-sigma fit error)
    SNR: 15.8601747352632
    RA  =  13h 36m 34.8s  (204.144801 deg.)
    Dec = -21d 56'  3" (-21.934213 deg.)
 
  Angular difference between Flight and Ground position is 1.004818 arcmin
 
  Partial Coding Fraction: 0.9765625    [ including projection effects ]

  Duration
     T90: 19.4000000059605 +/- 6.1077082574253
        Measured from: 0.188000023365021
                   to: 19.5880000293255     [s; relative to TRIGTIME]
     T50: 6.91200000047684 +/- 5.20609182613997
        Measured from: 0.880000025033951
                   to: 7.79200002551079     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.0520000159740448     
                   to: 1.05200001597404     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0.0520000159740448     
                   to: 25.688000023365     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.217926   0.234469   0.090510   0.051554
           0.024179   0.024265   0.021908   0.020755 [error]
 Peak      0.045985   0.065555   0.055795   0.008969
           0.005457   0.005693   0.005131   0.004260 [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 6.83e-08 9.31e-08 9.38e-08 1.71e-07 3.10e-07 4.23e-07   erg/cm2
              Error 1.21e-08 1.15e-08 2.14e-08 7.83e-08 4.79e-08 1.01e-07   erg/cm2
Peak flux Power-law 4.38e-01 4.78e-01 3.71e-01 4.72e-01 1.46e+00 1.76e+00   ph/cm2/s
              Error 7.41e-02 4.90e-02 4.17e-02 1.12e-01 1.38e-01 1.66e-01   ph/cm2/s
 
Fluence   Cutoff-PL 6.82e-08 9.32e-08 9.38e-08 1.70e-07 3.10e-07 3.97e-07   erg/cm2
              Error 1.21e-08 1.15e-08 2.14e-08 7.77e-08 4.79e-08 1.36e-07   erg/cm2
Peak flux Cutoff-PL 4.23e-01 4.86e-01 3.78e-01 3.80e-01 1.45e+00 1.67e+00   ph/cm2/s
              Error 8.75e-02 5.57e-02 4.80e-02 1.93e-01 1.40e-01 2.44e-01   ph/cm2/s
 
Fluence        Band 6.68e-08 9.43e-08 9.29e-08 1.61e-07 3.08e-07 4.13e-07   erg/cm2
              Error 1.22e-08 1.37e-08 2.29e-08 1.11e-07 3.87e-08 1.33e-07   erg/cm2
Peak flux      Band 4.30e-01 4.86e-01 3.70e-01 4.60e-01 1.46e+00 1.74e+00   ph/cm2/s
              Error 7.67e-02 4.66e-02 4.03e-02 1.19e-01 1.40e-01 1.74e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.990    0.251    -      -           1.31e-03 2.13e-04   58.854 57
CPL   2.021    0.000      21.2    0.0      1.25e-03 2.44e-03   58.828 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.366    0.162    -      -           1.21e-02 1.12e-03   61.491 57
CPL   1.178    0.506     229.2 5000.0      1.50e-02 1.01e-02   61.202 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: 1.088000 sec.
T50 in the 50-300 keV band: 0.576000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   25.636    0.052   25.688
T90    19.400    0.188   19.588
T50     6.912    0.880    7.792
Peak    1.000    0.052    1.052

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  204.1448 -21.9342 0.0121   19.7 -176.2       0.4637    15.9  TRIG_00148522       
------------------------------------------
 
Foreground time interval of the image:
  0.052   9.973 (delta_t =   9.921 [sec])
Background time interval of the image:
-299.728   0.052 (delta_t = 299.780 [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    0.052 sec. to   25.688 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.99035     ( -0.243324   0.259008 )
Norm@50keV  : 1.312967E-03    ( -2.167338E-04   2.096394E-04) )
------------------------------------------------------------
 Chi-Squared =      58.85387     using    59 PHA bins.
 Reduced chi-squared =      1.032524     for     57 degrees of freedom
 Null hypothesis probability = 0.407
 
Photon flux (15-150 keV)    in 25.64 sec: 0.196076 ( -0.023924  0.023929 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.10288e-07 ( -4.71032e-08  4.86852e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.052 sec. to   25.688 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.02050     (     )
Epeak [keV] : 21.2287      (   )
Norm@50keV  : 1.248038E-03    ( -1.180529E-03   3.694588E-03) )
------------------------------------------------------------
 Chi-Squared =      58.82843     using    59 PHA bins.
 Reduced chi-squared =      1.050508     for     56 degrees of freedom
 Null hypothesis probability = 0.372
 
Photon flux (15-150 keV)    in 25.64 sec: 0.196006 ( -0.023917  0.02392 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.10257e-07 ( -4.71032e-08  4.86801e-08 ) ergs/cm2
 
Band function
Time interval is from    0.052 sec. to   25.688 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.45385   ( -8.54615   4.79134 )
beta        : -2.01101    ( -7.98899   0.263877 )
Epeak [keV] : 25.2968      ( -25.1968 110.847 )
Norm@50keV   : 3.328615E-03    ( -3.328615E-03   3364.42 )
------------------------------------------------------------
 Chi-Squared =      58.85179     using    59 PHA bins.
 Reduced chi-squared =      1.070032     for     55 degrees of freedom
 Null hypothesis probability = 0.336
 
Photon flux (15-150 keV)    in 25.64 sec: 0.195925 ( -0.023775  21.379 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.07652e-07 ( -2.81194e-08  4.92288e-08 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    0.052 sec. to    1.052 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.36561     ( -0.162698   0.162296 )
Norm@50keV  : 1.211083E-02    ( -1.118526E-03   1.114786E-03) )
------------------------------------------------------------
 Chi-Squared =      61.49062     using    59 PHA bins.
 Reduced chi-squared =      1.078783     for     57 degrees of freedom
 Null hypothesis probability = 0.318
 
Photon flux (15-150 keV)    in 1.000 sec: 1.46377 ( -0.13751  0.13771 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.17887e-07 ( -1.2079e-08  1.216e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.052 sec. to    1.052 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.17787     ( -0.672754   0.339157 )
Epeak [keV] : 229.173      ( -229.163 9770.83 )
Norm@50keV  : 1.498440E-02    ( -3.890286E-03   1.628594E-02) )
------------------------------------------------------------
 Chi-Squared =      61.20158     using    59 PHA bins.
 Reduced chi-squared =      1.092885     for     56 degrees of freedom
 Null hypothesis probability = 0.295
 
Photon flux (15-150 keV)    in 1.000 sec: 1.45358 ( -0.14083  0.13968 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.16667e-07 ( -1.2786e-08  1.2642e-08 ) ergs/cm2
 
Band function
Time interval is from    0.052 sec. to    1.052 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.923763   ( -9.07624   4.03756 )
beta        : -1.38459    ( -8.61541   0.174883 )
Epeak [keV] : 68.2738      ( -68.1738 9814.61 )
Norm@50keV   : 2.473768E-02    ( -31.2000   744.260 )
------------------------------------------------------------
 Chi-Squared =      61.27223     using    59 PHA bins.
 Reduced chi-squared =      1.114040     for     55 degrees of freedom
 Null hypothesis probability = 0.261
 
Photon flux (15-150 keV)    in 1.000 sec: 1.46104 ( -0.1445  0.13634 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.16463e-07 ( -1.2906e-08  1.2867e-08 ) ergs/cm2
 
Plot creation:
Tue Jan  8 14:42:20 EST 2008