batgrbproduct Analysis for Trigger=148833

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Tue Jan  8 15:01:57 EST 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger148833/SDC
======================================================================

  Trigger: 00148833      Segment: 000

  BAT Trigger Time: 144789240   [s; MET]
      Trigger Stop: 144789312   [s; MET]
               UTC: 2005-08-03T19:14:00.344280    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 350.649603158297   Dec: 5.80000785143894  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.61
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    7.61

  Flight Position:   [ source = BAT ]
    RA: 350.649603158297   Dec: 5.80000785143894  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 350.64697495923   Dec: 5.78768027466097  [deg; J2000]  
        { 23h 22m 35.3s , +05d 47' 15.6" }
         +/- 1.16062922453245 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.357228227190941 [arcmin] (formal 1-sigma fit error)
    SNR: 24.5866348666573
    RA  =  23h 22m 35.3s  (350.646975 deg.)
    Dec =   5d 47' 16" (5.787680 deg.)
 
  Angular difference between Flight and Ground position is 0.756110 arcmin
 
  Partial Coding Fraction: 0.3828125    [ including projection effects ]

  Duration
     T90: 86.4600000083447 +/- 10.4381272282503
        Measured from: 63.66400000453
                   to: 150.124000012875     [s; relative to TRIGTIME]
     T50: 37.1040000021458 +/- 7.59087162909776
        Measured from: 71.8280000090599
                   to: 108.932000011206     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 147.108000010252     
                   to: 148.108000010252     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 59.5839999914169     
                   to: 165.124000012875     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.897106   1.124569   1.000651   0.259828
           0.062134   0.063440   0.055211   0.045621 [error]
 Peak      0.028670   0.045531   0.035780   0.015853
           0.004626   0.005018   0.004651   0.003726 [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 2.68e-07 5.18e-07 7.77e-07 2.52e-06 2.19e-06 4.08e-06   erg/cm2
              Error 3.17e-08 3.55e-08 5.52e-08 4.11e-07 1.36e-07 4.40e-07   erg/cm2
Peak flux Power-law 3.07e-01 3.43e-01 2.74e-01 3.64e-01 1.06e+00 1.29e+00   ph/cm2/s
              Error 6.95e-02 4.65e-02 3.83e-02 1.10e-01 1.28e-01 1.54e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.62e-07 5.21e-07 7.81e-07 2.32e-06 2.18e-06 3.70e-06   erg/cm2
              Error 3.76e-08 3.69e-08 6.20e-08 7.79e-07 1.33e-07 8.00e-07   erg/cm2
Peak flux Cutoff-PL 3.06e-01 3.43e-01 2.74e-01 3.62e-01 1.06e+00 1.29e+00   ph/cm2/s
              Error 6.95e-02 4.65e-02 3.83e-02 1.09e-01 1.28e-01 1.54e-01   ph/cm2/s
 
Fluence        Band 2.62e-07 5.19e-07 7.80e-07 2.33e-06 2.18e-06 3.77e-06   erg/cm2
              Error 3.72e-08 3.79e-08 6.21e-08 7.79e-07 1.41e-07 8.08e-07   erg/cm2
Peak flux      Band 3.05e-01 3.41e-01 2.77e-01 3.75e-01 1.05e+00 1.30e+00   ph/cm2/s
              Error 5.31e-02 4.46e-02 3.58e-02 1.03e-01 1.26e-01 1.51e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.416    0.110    -      -           2.15e-03 1.26e-04   61.059 57
CPL   1.288    0.304     310.7    0.0      2.46e-03 7.65e-04   61.117 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.322    0.213    -      -           8.83e-03 1.03e-03   49.943 57
CPL   1.312    0.216    9925.0 5000.0      8.87e-03 3.31e-03   49.962  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: 84.480000 sec.
T50 in the 50-300 keV band: 19.648000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  105.540   59.584  165.124
T90    86.460   63.664  150.124
T50    37.104   71.828  108.932
Peak    1.000  147.108  148.108

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  350.6470  +5.7877 0.0078   34.7   39.6       1.9717    24.6  TRIG_00148833       
------------------------------------------
 
Foreground time interval of the image:
 59.584  85.205 (delta_t =  25.621 [sec])
Background time interval of the image:
-299.000  59.584 (delta_t = 358.584 [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   59.584 sec. to  165.124 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.41643     ( -0.109978   0.109563 )
Norm@50keV  : 2.152102E-03    ( -1.258356E-04   1.258354E-04) )
------------------------------------------------------------
 Chi-Squared =      61.05930     using    59 PHA bins.
 Reduced chi-squared =      1.071216     for     57 degrees of freedom
 Null hypothesis probability = 0.332
 
Photon flux (15-150 keV)    in 105.5 sec: 0.263080 ( -0.016782  0.016879 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.18679e-06 ( -1.36158e-07  1.36211e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   59.584 sec. to  165.124 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.28805     ( -0.371678   0.236569 )
Epeak [keV] : 310.675      (   )
Norm@50keV  : 2.463775E-03    ( -1.215194E-04   1.409037E-03) )
------------------------------------------------------------
 Chi-Squared =      61.11712     using    59 PHA bins.
 Reduced chi-squared =      1.091377     for     56 degrees of freedom
 Null hypothesis probability = 0.297
 
Photon flux (15-150 keV)    in 105.5 sec: 0.262142 ( -0.008518  0.016947 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.18091e-06 ( -1.28288e-07  1.36802e-07 ) ergs/cm2
 
Band function
Time interval is from   59.584 sec. to  165.124 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.13351   ( -8.86649   3.44666 )
beta        : -1.41481    ( -0.111316   0.108567 )
Epeak [keV] : 53.8383      ( -9877.00 1.48047 )
Norm@50keV   : 3.834058E-03    ( -2.555442E-04   123.458 )
------------------------------------------------------------
 Chi-Squared =      61.06918     using    59 PHA bins.
 Reduced chi-squared =      1.110349     for     55 degrees of freedom
 Null hypothesis probability = 0.267
 
Photon flux (15-150 keV)    in 105.5 sec: 0.262144 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.18017e-06 ( -1.42246e-07  1.4041e-07 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from  147.108 sec. to  148.108 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.32241     ( -0.214249   0.211816 )
Norm@50keV  : 8.831178E-03    ( -1.027970E-03   1.027376E-03) )
------------------------------------------------------------
 Chi-Squared =      49.94267     using    59 PHA bins.
 Reduced chi-squared =     0.8761871     for     57 degrees of freedom
 Null hypothesis probability = 0.735
 
Photon flux (15-150 keV)    in 1.000 sec: 1.05805 ( -0.127891  0.12832 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.67849e-08 ( -1.11561e-08  1.12579e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  147.108 sec. to  148.108 sec.
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.31162     ( -0.210879   0.220471 )
Epeak [keV] : 9925.02      ( -9925.01 74.9775 )
Norm@50keV  : 8.869861E-03    ( -1.030424E-03   5.599545E-03) )
------------------------------------------------------------
 Chi-Squared =      49.96205     using    59 PHA bins.
 but latest trial   1.10038     gives Chi-Squared =   1.02229
 Reduced chi-squared =     0.8921794     for     56 degrees of freedom
 Null hypothesis probability = 0.702
 
Photon flux (15-150 keV)    in 1.000 sec: 1.05774 ( -0.127859  0.12827 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.68187e-08 ( -1.11827e-08  1.1265e-08 ) ergs/cm2
 
Band function
Time interval is from  147.108 sec. to  148.108 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.952037   ( -10.9882   4.01185 )
beta        : -1.32997    ( -0.229879   0.220467 )
Epeak [keV] : 68.7802      ( -25.7219 764.725 )
Norm@50keV   : 1.682997E-02    ( -23.7033   1198.34 )
------------------------------------------------------------
 Chi-Squared =      49.90762     using    59 PHA bins.
 Reduced chi-squared =     0.9074113     for     55 degrees of freedom
 Null hypothesis probability = 0.669
 
Photon flux (15-150 keV)    in 1.000 sec: 1.05403 ( -0.124163  0.12765 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.70931e-08 ( -1.09103e-08  1.08351e-08 ) ergs/cm2
 
Plot creation:
Tue Jan  8 15:15:06 EST 2008