batgrbproduct Analysis for Trigger=176702

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Sat Dec 29 18:58:29 EST 2007
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger176702/SDC
======================================================================

  Trigger: 00176702      Segment: 000

  BAT Trigger Time: 158572878.72   [s; MET]
      Trigger Stop: 158572879.232   [s; MET]
               UTC: 2006-01-10T08:01:17.773060    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 72.740721621106   Dec: 28.3800293891184  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.92
     Image Trigger?:     NO
     Rate S/N Ratio:     18.5202591774521  [ if not an image trigger ]
     Image S/N Ratio:    7.92

  Flight Position:   [ source = BAT ]
    RA: 72.740721621106   Dec: 28.3800293891184  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 72.7378753849875   Dec: 28.4276505806565  [deg; J2000]  
        { 04h 50m 57.1s , +28d 25' 39.5" }
         +/- 0.780580809320177 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.235075425886241 [arcmin] (formal 1-sigma fit error)
    SNR: 43.3318406398017
    RA  =   4h 50m 57.1s  (72.737875 deg.)
    Dec =  28d 25' 40" (28.427651 deg.)
 
  Angular difference between Flight and Ground position is 2.861217 arcmin
 
  Partial Coding Fraction: 0.921875    [ including projection effects ]

  Duration
     T90: 25 +/- 4.12310562561766
        Measured from: 0.280000001192093
                   to: 25.2800000011921     [s; relative to TRIGTIME]
     T50: 9 +/- 1
        Measured from: 2.28000000119209
                   to: 11.2800000011921     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 1.28000000119209     
                   to: 2.28000000119209     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -1.71999999880791     
                   to: 34.2800000011921     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.847035   0.928844   0.684228   0.139463
           0.032160   0.032793   0.028563   0.023466 [error]
 Peak      0.058067   0.089357   0.073575   0.007065
           0.006021   0.006322   0.005825   0.004523 [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 2.45e-07 4.11e-07 5.23e-07 1.33e-06 1.55e-06 2.52e-06   erg/cm2
              Error 1.99e-08 1.88e-08 2.92e-08 1.70e-07 6.86e-08 1.87e-07   erg/cm2
Peak flux Power-law 5.84e-01 6.35e-01 4.91e-01 6.22e-01 1.94e+00 2.33e+00   ph/cm2/s
              Error 8.12e-02 5.49e-02 4.64e-02 1.20e-01 1.56e-01 1.87e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.44e-07 4.13e-07 5.25e-07 1.23e-06 1.54e-06 2.35e-06   erg/cm2
              Error 2.12e-08 1.99e-08 3.10e-08 3.28e-07 5.54e-08 3.45e-07   erg/cm2
Peak flux Cutoff-PL 4.99e-01 6.84e-01 5.29e-01 2.78e-01 1.89e+00 1.99e+00   ph/cm2/s
              Error 9.77e-02 6.67e-02 5.58e-02 1.52e-01 1.61e-01 2.17e-01   ph/cm2/s
 
Fluence        Band 2.39e-07 4.10e-07 5.22e-07 1.32e-06 1.55e-06 2.38e-06   erg/cm2
              Error 2.30e-08 1.98e-08 3.07e-08 1.69e-07 6.81e-08 2.37e-07   erg/cm2
Peak flux      Band 4.99e-01 6.84e-01 5.29e-01 2.78e-01 1.89e+00 1.99e+00   ph/cm2/s
              Error 9.77e-02 6.67e-02 5.58e-02 1.52e-01 1.61e-01 2.17e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.653    0.083    -      -           4.63e-03 1.94e-04   49.544 57
CPL   1.601    0.209     412.1    0.0      4.89e-03 1.95e-04   49.581 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.372    0.131    -      -           1.61e-02 1.26e-03   53.145 57
CPL   0.538    0.605      90.0   48.6      4.16e-02 3.15e-02   46.253 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: 22.528000 sec.
T50 in the 50-300 keV band: 8.384000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   36.000   -1.720   34.280
T90    25.000    0.280   25.280
T50     9.000    2.280   11.280
Peak    1.000    1.280    2.280

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
   72.7379 +28.4277 0.0044   24.1 -177.5       2.8247    43.3  TRIG_00176702       
------------------------------------------
 
Foreground time interval of the image:
 -1.720  34.280 (delta_t =  36.000 [sec])
Background time interval of the image:
-299.720 -20.391 (delta_t = 279.329 [sec])
-19.720  -1.720 (delta_t =  18.000 [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   -1.720 sec. to   34.280 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.65287     ( -8.246851E-02   8.300734E-02) )
Norm@50keV  : 4.625744E-03    ( -1.947186E-04   1.942567E-04) )
------------------------------------------------------------
 Chi-Squared =      49.54436     using    59 PHA bins.
 Reduced chi-squared =     0.8691994     for     57 degrees of freedom
 Null hypothesis probability = 0.748
 
Photon flux (15-150 keV)    in 36.00 sec: 0.604581 ( -0.027521  0.027649 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.54835e-06 ( -6.84144e-08  6.88104e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -1.720 sec. to   34.280 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.60129     ( -0.283842   0.133849 )
Epeak [keV] : 412.139      (   )
Norm@50keV  : 4.888154E-03    ( -1.968876E-04   1.935461E-04) )
------------------------------------------------------------
 Chi-Squared =      49.58107     using    59 PHA bins.
 Reduced chi-squared =     0.8853762     for     56 degrees of freedom
 Null hypothesis probability = 0.715
 
Photon flux (15-150 keV)    in 36.00 sec: 0.604256 ( -0.027505  0.027634 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.54322e-06 ( -3.62916e-08  7.45704e-08 ) ergs/cm2
 
Band function
Time interval is from   -1.720 sec. to   34.280 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.41932   ( -8.58068   4.33107 )
beta        : -1.65287    ( -8.301926E-02   8.250427E-02) )
Epeak [keV] : 23.5286      ( -23.4286 9976.47 )
Norm@50keV   : 8.618905E-03    ( -3.992009E-03   26.9795 )
------------------------------------------------------------
 Chi-Squared =      49.54436     using    59 PHA bins.
 Reduced chi-squared =     0.9008065     for     55 degrees of freedom
 Null hypothesis probability = 0.682
 
Photon flux (15-150 keV)    in 36.00 sec: 0.604225 ( -0.031008  0.027666 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.54683e-06 ( -6.74676e-08  6.87996e-08 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    1.280 sec. to    2.280 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.37164     ( -0.131333   0.131176 )
Norm@50keV  : 1.605721E-02    ( -1.262809E-03   1.261400E-03) )
------------------------------------------------------------
 Chi-Squared =      53.14547     using    59 PHA bins.
 Reduced chi-squared =     0.9323767     for     57 degrees of freedom
 Null hypothesis probability = 0.620
 
Photon flux (15-150 keV)    in 1.000 sec: 1.94325 ( -0.1554  0.15562 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.56148e-07 ( -1.3567e-08  1.3532e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    1.280 sec. to    2.280 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.537555     ( -0.649179   0.560665 )
Epeak [keV] : 90.0428      ( -20.0185 77.2561 )
Norm@50keV  : 4.159649E-02    ( -1.929379E-02   4.374585E-02) )
------------------------------------------------------------
 Chi-Squared =      46.25278     using    59 PHA bins.
 Reduced chi-squared =     0.8259425     for     56 degrees of freedom
 Null hypothesis probability = 0.820
 
Photon flux (15-150 keV)    in 1.000 sec: 1.88694 ( -0.16076  0.16043 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.48335e-07 ( -1.465e-08  1.4911e-08 ) ergs/cm2
 
Band function
Time interval is from    1.280 sec. to    2.280 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.537919   ( -0.560286   0.649702 )
beta        : -8.97897    ( -1.02103   7.50050 )
Epeak [keV] : 90.0615      ( -20.0742 76.8046 )
Norm@50keV   : 4.157408E-02    ( -1.926957E-02   4.379903E-02) )
------------------------------------------------------------
 Chi-Squared =      46.25278     using    59 PHA bins.
 Reduced chi-squared =     0.8409597     for     55 degrees of freedom
 Null hypothesis probability = 0.793
 
Photon flux (15-150 keV)    in 1.000 sec: 1.88688 ( -0.16074  0.16057 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.4836e-07 ( -1.475e-08  1.4768e-08 ) ergs/cm2
 
Plot creation:
Sat Dec 29 19:12:45 EST 2007