batgrbproduct Analysis for Trigger=181156

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Mon Dec 31 12:25:22 EST 2007
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger181156/SDC
======================================================================

  Trigger: 00181156      Segment: 000

  BAT Trigger Time: 161366115.776   [s; MET]
      Trigger Stop: 161366117.824   [s; MET]
               UTC: 2006-02-11T15:55:14.766340    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 75.0691948313119   Dec: 14.9576753746448  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9.03
     Image Trigger?:     NO
     Rate S/N Ratio:     12.0415945787923  [ if not an image trigger ]
     Image S/N Ratio:    9.03

  Flight Position:   [ source = BAT ]
    RA: 75.0691948313119   Dec: 14.9576753746448  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 75.0826832160545   Dec: 14.9650415930742  [deg; J2000]  
        { 05h 00m 19.8s , +14d 57' 54.1" }
         +/- 1.91486017043637 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.903381245791206 [arcmin] (formal 1-sigma fit error)
    SNR: 12.02445575944
    RA  =   5h  0m 19.8s  (75.082683 deg.)
    Dec =  14d 57' 54" (14.965042 deg.)
 
  Angular difference between Flight and Ground position is 0.898141 arcmin
 
  Partial Coding Fraction: 0.828125    [ including projection effects ]

  Duration
     T90: 28.7360000312328 +/- 5.01083626545441
        Measured from: -9.85600000619888
                   to: 18.880000025034     [s; relative to TRIGTIME]
     T50: 8.32000002264977 +/- 5.23784381324225
        Measured from: -0.57600000500679
                   to: 7.74400001764297     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 1.77200001478195     
                   to: 2.77200001478195     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -10.7520000040531     
                   to: 21.6319999992847     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.206360   0.281331   0.211070   0.056454
           0.030193   0.030557   0.026555   0.022683 [error]
 Peak      0.021256   0.033133   0.025345   0.009205
           0.005323   0.005555   0.004790   0.003847 [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 6.42e-08 1.16e-07 1.62e-07 4.70e-07 4.65e-07 8.15e-07   erg/cm2
              Error 1.26e-08 1.40e-08 2.61e-08 1.63e-07 6.25e-08 1.84e-07   erg/cm2
Peak flux Power-law 2.23e-01 2.33e-01 1.73e-01 2.07e-01 7.09e-01 8.36e-01   ph/cm2/s
              Error 6.93e-02 4.60e-02 4.00e-02 9.75e-02 1.32e-01 1.58e-01   ph/cm2/s
 
Fluence   Cutoff-PL 6.11e-08 1.21e-07 1.65e-07 2.91e-07 4.54e-07 6.30e-07   erg/cm2
              Error 1.10e-08 1.70e-08 2.83e-08 2.63e-07 6.63e-08 2.75e-07   erg/cm2
Peak flux Cutoff-PL 2.00e-01 2.54e-01 1.82e-01 9.09e-02 6.93e-01 7.27e-01   ph/cm2/s
              Error 7.90e-02 5.98e-02 4.64e-02 1.37e-01 1.35e-01 1.97e-01   ph/cm2/s
 
Fluence        Band 6.05e-08 1.20e-07 1.65e-07 2.91e-07 4.54e-07 6.28e-07   erg/cm2
              Error 1.45e-08 1.71e-08 2.83e-08 2.63e-07 6.75e-08 2.75e-07   erg/cm2
Peak flux      Band 2.00e-01 2.60e-01 1.72e-01 1.65e-01 7.02e-01 7.99e-01   ph/cm2/s
              Error 8.37e-02 6.51e-02 4.55e-02 1.08e-01 1.40e-01 1.88e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.524    0.210    -      -           1.52e-03 1.85e-04   47.783 57
CPL   1.107    0.690     106.4 5000.0      2.46e-03 2.31e-03   47.312 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.431    0.312    -      -           5.78e-03 1.08e-03   44.236 57
CPL   0.697    1.187      84.7 4974.6      1.42e-02 5.38e-02   43.261  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: 2.816000 sec.
T50 in the 50-300 keV band: 1.408000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   32.384  -10.752   21.632
T90    28.736   -9.856   18.880
T50     8.320   -0.576    7.744
Peak    1.000    1.772    2.772

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
   75.0827 +14.9650 0.0160   17.1  121.5       0.7569    12.0  TRIG_00181156       
------------------------------------------
 
Foreground time interval of the image:
-10.752  21.632 (delta_t =  32.384 [sec])
Background time interval of the image:
-299.776 -10.752 (delta_t = 289.024 [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  -10.752 sec. to   21.632 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.52361     ( -0.208707   0.211835 )
Norm@50keV  : 1.519182E-03    ( -1.856264E-04   1.836644E-04) )
------------------------------------------------------------
 Chi-Squared =      47.78332     using    59 PHA bins.
 Reduced chi-squared =     0.8383038     for     57 degrees of freedom
 Null hypothesis probability = 0.803
 
Photon flux (15-150 keV)    in 32.38 sec: 0.190884 ( -0.022477  0.022503 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.64938e-07 ( -6.2121e-08  6.29435e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  -10.752 sec. to   21.632 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.10742     ( -0.772322   0.606979 )
Epeak [keV] : 106.418      ( -106.408 9893.58 )
Norm@50keV  : 2.461707E-03    ( -1.108008E-03   3.507115E-03) )
------------------------------------------------------------
 Chi-Squared =      47.31231     using    59 PHA bins.
 Reduced chi-squared =     0.8448626     for     56 degrees of freedom
 Null hypothesis probability = 0.789
 
Photon flux (15-150 keV)    in 32.38 sec: 0.188455 ( -0.02328  0.023118 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.54463e-07 ( -6.74961e-08  6.50514e-08 ) ergs/cm2
 
Band function
Time interval is from  -10.752 sec. to   21.632 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.13496   ( -0.578416   0.424744 )
beta        : -6.83798    ( -3.16202   6.90343 )
Epeak [keV] : 110.451      ( -110.351 9889.55 )
Norm@50keV   : 2.399222E-03    ( -1.044889E-03   3.537152E-03) )
------------------------------------------------------------
 Chi-Squared =      47.28289     using    59 PHA bins.
 Reduced chi-squared =     0.8596888     for     55 degrees of freedom
 Null hypothesis probability = 0.761
 
Photon flux (15-150 keV)    in 32.38 sec: 0.188447 ( -0.02325  0.023186 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.54139e-07 ( -6.75253e-08  6.75188e-08 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    1.792 sec. to    2.752 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.43090     ( -0.311764   0.312179 )
Norm@50keV  : 5.777598E-03    ( -1.089224E-03   1.080223E-03) )
------------------------------------------------------------
 Chi-Squared =      44.23584     using    59 PHA bins.
 Reduced chi-squared =     0.7760673     for     57 degrees of freedom
 Null hypothesis probability = 0.892
 
Photon flux (15-150 keV)    in 0.9600 sec: 0.708702 ( -0.131906  0.132135 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.32812e-08 ( -1.09864e-08  1.11641e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    1.792 sec. to    2.752 sec.
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.696593     ( -1.66823   0.704865 )
Epeak [keV] : 84.6831      ( -33.9877 9915.32 )
Norm@50keV  : 1.415001E-02    ( -1.415001E-02   9.352683E-02) )
------------------------------------------------------------
 Chi-Squared =      43.26051     using    59 PHA bins.
 but latest trial   1.84788     gives Chi-Squared =   5.70622
 Reduced chi-squared =     0.7725092     for     56 degrees of freedom
 Null hypothesis probability = 0.893
 
Photon flux (15-150 keV)    in 0.9600 sec: 0.693315 ( -0.135291  0.135037 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.01901e-08 ( -1.23747e-08  1.23799e-08 ) ergs/cm2
 
Band function
Time interval is from    1.792 sec. to    2.752 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 0.788535   ( -10.7885   4.21147 )
beta        : -1.70547    ( -0.764426   0.461261 )
Epeak [keV] : 41.6733      ( -41.5733 543.947 )
Norm@50keV   : 0.156527    ( -76.6229   18.7920 )
------------------------------------------------------------
 Chi-Squared =      42.15955     using    59 PHA bins.
 Reduced chi-squared =     0.7665373     for     55 degrees of freedom
 Null hypothesis probability = 0.898
 
Photon flux (15-150 keV)    in 0.9600 sec: 0.701706 ( -0.140333  0.140006 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.01669e-08 ( -1.2303e-08  1.24333e-08 ) ergs/cm2
 
Plot creation:
Mon Dec 31 12:35:08 EST 2007