batgrbproduct Analysis for Trigger=160672

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Wed Jan  9 17:08:22 EST 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger160672/SDC
======================================================================

  Trigger: 00160672      Segment: 000

  BAT Trigger Time: 151630313.472   [s; MET]
      Trigger Stop: 151630314.496   [s; MET]
               UTC: 2005-10-21T23:31:53.676000    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 126.037109457011   Dec: -45.5194340356682  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    6.77
     Image Trigger?:     NO
     Rate S/N Ratio:     12.8062484748657  [ if not an image trigger ]
     Image S/N Ratio:    6.77

  Flight Position:   [ source = BAT ]
    RA: 126.037109457011   Dec: -45.5194340356682  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 126.064324164865   Dec: -45.5330407816398  [deg; J2000]  
        { 08h 24m 15.4s , -45d 31' 58.9" }
         +/- 1.31530998733956 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.420589774427041 [arcmin] (formal 1-sigma fit error)
    SNR: 20.5626087288393
    RA  =   8h 24m 15.4s  (126.064324 deg.)
    Dec = -45d 31' 59" (-45.533041 deg.)
 
  Angular difference between Flight and Ground position is 1.405412 arcmin
 
  Partial Coding Fraction: 0.8828125    [ including projection effects ]

  Duration
     T90: 46.4159999787807 +/- 11.5088167840115
        Measured from: -3.13600000739098
                   to: 43.2799999713898     [s; relative to TRIGTIME]
     T50: 19.1839999854565 +/- 5.72149351346549
        Measured from: 0.879999995231628
                   to: 20.0639999806881     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.668000012636185     
                   to: 0.331999987363815     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -4.64000001549721     
                   to: 54.6719999909401     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.382616   0.542222   0.423473   0.080533
           0.038315   0.039340   0.035398   0.032604 [error]
 Peak      0.027793   0.035511   0.023935   0.008910
           0.005291   0.005713   0.005179   0.004637 [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 1.28e-07 2.28e-07 3.10e-07 8.69e-07 8.97e-07 1.54e-06   erg/cm2
              Error 1.75e-08 1.92e-08 3.44e-08 2.04e-07 8.26e-08 2.32e-07   erg/cm2
Peak flux Power-law 2.40e-01 2.55e-01 1.93e-01 2.37e-01 7.78e-01 9.25e-01   ph/cm2/s
              Error 7.82e-02 4.88e-02 4.38e-02 1.17e-01 1.37e-01 1.67e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.08e-07 2.52e-07 3.25e-07 2.49e-07 8.34e-07 9.34e-07   erg/cm2
              Error 2.16e-08 2.48e-08 4.00e-08 1.96e-07 9.07e-08 2.12e-07   erg/cm2
Peak flux Cutoff-PL 2.40e-01 2.55e-01 1.93e-01 2.35e-01 7.78e-01 9.23e-01   ph/cm2/s
              Error 7.82e-02 4.88e-02 4.38e-02 1.17e-01 1.37e-01 1.66e-01   ph/cm2/s
 
Fluence        Band 1.07e-07 2.51e-07 3.25e-07 2.49e-07 8.33e-07 9.31e-07   erg/cm2
              Error 2.14e-08 2.47e-08 3.99e-08 1.94e-07 9.05e-08 2.12e-07   erg/cm2
Peak flux      Band 2.29e-01 2.52e-01 1.94e-01 2.42e-01 7.77e-01 9.35e-01   ph/cm2/s
              Error 5.20e-02 4.36e-02 3.70e-02 9.05e-02 1.34e-01 1.61e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.558    0.143    -      -           1.61e-03 1.36e-04   59.083 57
CPL   0.538    0.708      70.6   26.0      5.30e-03 6.29e-03   51.350 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.405    0.337    -      -           6.38e-03 1.13e-03   47.254 57
CPL   1.402    0.340    9987.8 5000.0      6.40e-03 1.13e-03   47.263 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: 12.928000 sec.
T50 in the 50-300 keV band: 6.720000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   59.312   -4.640   54.672
T90    46.416   -3.136   43.280
T50    19.184    0.880   20.064
Peak    1.000   -0.668    0.332

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  126.0643 -45.5330 0.0094   27.3  -18.7       0.9743    20.6  TRIG_00160672       
------------------------------------------
 
Foreground time interval of the image:
 -4.640  14.429 (delta_t =  19.069 [sec])
Background time interval of the image:
-299.472  -4.640 (delta_t = 294.832 [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   -4.640 sec. to   54.672 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.55781     ( -0.141801   0.143526 )
Norm@50keV  : 1.608008E-03    ( -1.363675E-04   1.353556E-04) )
------------------------------------------------------------
 Chi-Squared =      59.08289     using    59 PHA bins.
 Reduced chi-squared =      1.036542     for     57 degrees of freedom
 Null hypothesis probability = 0.399
 
Photon flux (15-150 keV)    in 59.31 sec: 0.204025 ( -0.016892  0.016916 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.96951e-07 ( -8.23579e-08  8.28976e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -4.640 sec. to   54.672 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.537622     ( -0.764781   0.650788 )
Epeak [keV] : 70.6297      ( -12.6929 39.2895 )
Norm@50keV  : 5.297191E-03    ( -5.297191E-03   7.292272E-03) )
------------------------------------------------------------
 Chi-Squared =      51.35028     using    59 PHA bins.
 Reduced chi-squared =     0.9169693     for     56 degrees of freedom
 Null hypothesis probability = 0.651
 
Photon flux (15-150 keV)    in 59.31 sec: 0.194833 ( -0.017981  0.017894 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.33922e-07 ( -8.96233e-08  9.18178e-08 ) ergs/cm2
 
Band function
Time interval is from   -4.640 sec. to   54.672 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.544130   ( -0.644972   0.526391 )
beta        : -9.13351    ( -0.866491   7.26664 )
Epeak [keV] : 70.7604      ( -12.8374 39.1646 )
Norm@50keV   : 5.257438E-03    ( -5.257438E-03   7.337620E-03) )
------------------------------------------------------------
 Chi-Squared =      51.35079     using    59 PHA bins.
 Reduced chi-squared =     0.9336507     for     55 degrees of freedom
 Null hypothesis probability = 0.615
 
Photon flux (15-150 keV)    in 59.31 sec: 0.194877 ( -0.017998  0.017871 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.33448e-07 ( -8.95047e-08  9.15924e-08 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from   -0.672 sec. to    0.336 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.40514     ( -0.334731   0.340261 )
Norm@50keV  : 6.382161E-03    ( -1.134662E-03   1.119184E-03) )
------------------------------------------------------------
 Chi-Squared =      47.25362     using    59 PHA bins.
 Reduced chi-squared =     0.8290109     for     57 degrees of freedom
 Null hypothesis probability = 0.818
 
Photon flux (15-150 keV)    in 1.008 sec: 0.778133 ( -0.136662  0.137072 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.21314e-08 ( -1.24524e-08  1.25693e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.672 sec. to    0.336 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.40234     ( -0.336849   0.342227 )
Epeak [keV] : 9987.83      ( -9987.82 12.1660 )
Norm@50keV  : 6.404708E-03    ( -1.142778E-03   1.125559E-03) )
------------------------------------------------------------
 Chi-Squared =      47.26278     using    59 PHA bins.
 Reduced chi-squared =     0.8439781     for     56 degrees of freedom
 Null hypothesis probability = 0.791
 
Photon flux (15-150 keV)    in 1.008 sec: 0.777849 ( -0.136619  0.137027 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.20972e-08 ( -1.24178e-08  1.2615e-08 ) ergs/cm2
 
Band function
Time interval is from   -0.672 sec. to    0.336 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.14207   ( -8.85793   3.08768 )
beta        : -1.40498    ( -8.59502   0.334575 )
Epeak [keV] : 32.4940      ( -32.3940 9967.51 )
Norm@50keV   : 1.269157E-02    ( -1.269157E-02   114.153 )
------------------------------------------------------------
 Chi-Squared =      47.25363     using    59 PHA bins.
 Reduced chi-squared =     0.8591568     for     55 degrees of freedom
 Null hypothesis probability = 0.762
 
Photon flux (15-150 keV)    in 1.008 sec: 0.776821 ( -0.134002  0.13355 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.20339e-08 ( -1.24074e-08  1.26178e-08 ) ergs/cm2
 
Plot creation:
Wed Jan  9 17:18:40 EST 2008