batgrbproduct Analysis for Trigger=145675

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Mon Jan  7 13:15:48 EST 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger145675/SDC
======================================================================

  Trigger: 00145675      Segment: 000

  BAT Trigger Time: 142921742.016   [s; MET]
      Trigger Stop: 142921742.528   [s; MET]
               UTC: 2005-07-13T04:29:02.396820    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 320.536539185524   Dec: 77.0721719432608  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    11.32
     Image Trigger?:     NO
     Rate S/N Ratio:     31.2729915422238  [ if not an image trigger ]
     Image S/N Ratio:    11.32

  Flight Position:   [ source = BAT ]
    RA: 320.536539185524   Dec: 77.0721719432608  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 320.573358178001   Dec: 77.0717721918336  [deg; J2000]  
        { 21h 22m 17.6s , +77d 04' 18.4" }
         +/- 1.06217506423059 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.389735418817802 [arcmin] (formal 1-sigma fit error)
    SNR: 27.9058578495964
    RA  =  21h 22m 17.6s  (320.573358 deg.)
    Dec =  77d  4' 18" (77.071772 deg.)
 
  Angular difference between Flight and Ground position is 0.494826 arcmin
 
  Partial Coding Fraction: 0.3046875    [ including projection effects ]

  Duration
     T90: 124.655999958515 +/- 62.2008643083915
        Measured from: -52.5839999914169
                   to: 72.0719999670982     [s; relative to TRIGTIME]
     T50: 10.527999997139 +/- 1.39778107404888
        Measured from: 2.90399998426437
                   to: 13.4319999814034     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.972000002861023     
                   to: 1.97200000286102     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -70.5200000107288     
                   to: 121.592000007629     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     2.281927   2.898965   2.347320   0.636014
           0.093844   0.097314   0.086530   0.075588 [error]
 Peak      0.121688   0.207917   0.171393   0.076686
           0.011360   0.012618   0.011651   0.009656 [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 7.34e-07 1.31e-06 1.78e-06 5.03e-06 5.15e-06 8.86e-06   erg/cm2
              Error 5.74e-08 5.82e-08 8.89e-08 5.77e-07 2.14e-07 6.24e-07   erg/cm2
Peak flux Power-law 1.28e+00 1.48e+00 1.24e+00 1.76e+00 4.64e+00 5.76e+00   ph/cm2/s
              Error 1.70e-01 1.18e-01 9.58e-02 2.95e-01 3.22e-01 3.96e-01   ph/cm2/s
 
Fluence   Cutoff-PL 7.09e-07 1.32e-06 1.81e-06 4.09e-06 5.11e-06 7.90e-06   erg/cm2
              Error 7.33e-08 6.37e-08 9.90e-08 1.35e-06 2.31e-07 1.38e-06   erg/cm2
Peak flux Cutoff-PL 1.27e+00 1.49e+00 1.24e+00 1.75e+00 4.63e+00 5.75e+00   ph/cm2/s
              Error 1.70e-01 1.18e-01 8.94e-02 1.96e-01 3.22e-01 3.95e-01   ph/cm2/s
 
Fluence        Band 7.03e-07 1.32e-06 1.80e-06 4.09e-06 5.10e-06 7.82e-06   erg/cm2
              Error 7.26e-08 6.37e-08 9.91e-08 1.35e-06 1.77e-07 1.38e-06   erg/cm2
Peak flux      Band 1.17e+00 1.55e+00 1.25e+00 1.63e+00 4.57e+00 5.61e+00   ph/cm2/s
              Error 2.36e-01 1.33e-01 9.72e-02 2.62e-01 3.29e-01 4.71e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.552    0.076    -      -           2.85e-03 1.12e-04   69.207 57
CPL   1.374    0.255     190.2 5000.0      3.45e-03 9.30e-04   68.443  0
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.255    0.120    -      -           3.92e-02 2.59e-03   42.097 57
CPL   1.205    0.295     829.2    0.0      4.14e-02 2.60e-03   42.145 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: 65.472000 sec.
T50 in the 50-300 keV band: 8.640000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  192.112  -70.520  121.592
T90   124.656  -52.584   72.072
T50    10.528    2.904   13.432
Peak    1.000    0.972    1.972

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  320.5734 +77.0718 0.0069   33.0  114.3       5.0523    27.9  TRIG_00145675       
------------------------------------------
 
Foreground time interval of the image:
-70.520   9.485 (delta_t =  80.005 [sec])
Background time interval of the image:
-244.315 -70.520 (delta_t = 173.795 [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  -70.520 sec. to  121.592 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.55245     ( -7.589149E-02   7.599115E-02) )
Norm@50keV  : 2.850216E-03    ( -1.116386E-04   1.115783E-04) )
------------------------------------------------------------
 Chi-Squared =      69.20692     using    59 PHA bins.
 Reduced chi-squared =      1.214157     for     57 degrees of freedom
 Null hypothesis probability = 0.129
 
Photon flux (15-150 keV)    in 192.1 sec: 0.361077 ( -0.015574  0.015639 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.15285e-06 ( -2.13385e-07  2.1423e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  -70.520 sec. to  121.592 sec.
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.37405     ( -0.280955   0.228609 )
Epeak [keV] : 190.170      ( -190.160 9809.83 )
Norm@50keV  : 3.447382E-03    ( -6.850173E-04   1.175174E-03) )
------------------------------------------------------------
 Chi-Squared =      68.44308     using    59 PHA bins.
 but latest trial   1.60116     gives Chi-Squared =   1.95474
 Reduced chi-squared =      1.222198     for     56 degrees of freedom
 Null hypothesis probability = 0.123
 
Photon flux (15-150 keV)    in 192.1 sec: 0.357209 ( -0.017079  0.020376 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.10515e-06 ( -2.36264e-07  2.24968e-07 ) ergs/cm2
 
Band function
Time interval is from  -70.520 sec. to  121.592 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.14757   ( -8.85243   2.74995 )
beta        : -1.56348    ( -8.08478   0.426703 )
Epeak [keV] : 58.7476      ( -209.256 9776.27 )
Norm@50keV   : 5.460228E-03    ( -6.066663E-04   61344.8 )
------------------------------------------------------------
 Chi-Squared =      69.06757     using    59 PHA bins.
 Reduced chi-squared =      1.255774     for     55 degrees of freedom
 Null hypothesis probability = 9.615E-02
 
Photon flux (15-150 keV)    in 192.1 sec: 0.357228 ( -0.017075  0.016599 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.10022e-06 ( -2.35745e-07  1.17777e-07 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    0.968 sec. to    1.976 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.25505     ( -0.121021   0.119902 )
Norm@50keV  : 3.916584E-02    ( -2.592277E-03   2.592169E-03) )
------------------------------------------------------------
 Chi-Squared =      42.09719     using    59 PHA bins.
 Reduced chi-squared =     0.7385473     for     57 degrees of freedom
 Null hypothesis probability = 0.930
 
Photon flux (15-150 keV)    in 1.008 sec: 4.63610 ( -0.3214  0.3222 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.94598e-07 ( -2.86695e-08  2.87774e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.968 sec. to    1.976 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.20530     ( -0.423162   0.167401 )
Epeak [keV] : 829.201      (   )
Norm@50keV  : 4.138603E-02    ( -2.603710E-03   2.603643E-03) )
------------------------------------------------------------
 Chi-Squared =      42.14500     using    59 PHA bins.
 Reduced chi-squared =     0.7525892     for     56 degrees of freedom
 Null hypothesis probability = 0.915
 
Photon flux (15-150 keV)    in 1.008 sec: 4.63473 ( -0.32125  0.3221 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.94689e-07 ( -2.86766e-08  2.88006e-08 ) ergs/cm2
 
Band function
Time interval is from    0.968 sec. to    1.976 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.433490   ( -9.56651   3.84728 )
beta        : -1.34140    ( -0.237827   0.183513 )
Epeak [keV] : 69.0413      ( -68.9413 9437.06 )
Norm@50keV   : 0.122644    ( -0.122644   1147.33 )
------------------------------------------------------------
 Chi-Squared =      41.14033     using    59 PHA bins.
 Reduced chi-squared =     0.7480059     for     55 degrees of freedom
 Null hypothesis probability = 0.917
 
Photon flux (15-150 keV)    in 1.008 sec: 4.57234 ( -0.33865  0.31983 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.89591e-07 ( -2.9982e-08  4.11879e-08 ) ergs/cm2
 
Plot creation:
Mon Jan  7 13:33:48 EST 2008