batgrbproduct Analysis for Trigger=505801

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Wed Oct 19 10:12:34 EDT 2011
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger505801/GCN5_download_cron
======================================================================

  Trigger: 00505801      Segment: 000

  BAT Trigger Time: 340651592   [s; MET]
      Trigger Stop: 340651656   [s; MET]
               UTC: 2011-10-18T17:26:24.519600    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 271.500387190674   Dec: -3.8713557158467  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.53
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    7.53

  Flight Position:   [ source = BAT ]
    RA: 271.500387190674   Dec: -3.8713557158467  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 271.481558798215   Dec: -3.88013472698288  [deg; J2000]  
        { 18h 05m 55.6s , -03d 52' 48.5" }
         +/- 2.04955105827082 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.23674613636685 [arcmin] (formal 1-sigma fit error)
    SNR: 10.9116796137211
 
  Angular difference between Flight and Ground position is 1.244128 arcmin
 
  Partial Coding Fraction: 0.8046875    [ including projection effects ]

  Duration
     T90: 36.5359999537468 +/- 4.21558724832551
        Measured from: -0.583999872207642
                   to: 35.9520000815392     [s; relative to TRIGTIME]
     T50: 24.4319999814034 +/- 14.0117672229288
        Measured from: 4.28000009059906
                   to: 28.7120000720024     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 21.7120000123978     
                   to: 22.7120000123978     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -4.0799999833107     
                   to: 37.2960000038147     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.309583   0.359287   0.124180   0.018191
           0.040323   0.039111   0.033198   0.028692 [error]
 Peak      0.014295   0.028636   0.008238   0.005292
           0.006361   0.006236   0.005113   0.004423 [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 1.03e-07 1.26e-07 1.12e-07 1.71e-07 4.01e-07 5.12e-07   erg/cm2
              Error 1.84e-08 1.81e-08 2.98e-08 8.75e-08 6.87e-08 1.25e-07   erg/cm2
Peak flux Power-law 1.77e-01 1.51e-01 8.82e-02 7.70e-02 4.49e-01 4.93e-01   ph/cm2/s
              Error 8.26e-02 4.82e-02 4.12e-02 7.24e-02 1.43e-01 1.60e-01   ph/cm2/s
 
Fluence   Cutoff-PL 9.96e-08 1.39e-07 9.85e-08 3.59e-08 3.63e-07 3.73e-07   erg/cm2
              Error 1.99e-08 2.59e-08 4.07e-08 1.18e-07 8.03e-08 1.56e-07   erg/cm2
Peak flux Cutoff-PL 1.55e-01 1.94e-01 6.23e-02 2.93e-03 4.15e-01 4.15e-01   ph/cm2/s
              Error 1.27e-01 7.98e-02 5.96e-02 7.85e-02 1.86e-01 1.86e-01   ph/cm2/s
 
Fluence        Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   erg/cm2
              Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   erg/cm2
Peak flux      Band 4.27e-01 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   ph/cm2/s
              Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.175    0.271    -      -           1.03e-03 2.01e-04   52.420 57
CPL   1.314    1.253      29.5    0.0      3.55e-03 0.00e+00   51.030 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.776    0.576    -      -           3.29e-03 1.21e-03   51.010 57
CPL   0.016    1.268      41.6    0.0      4.11e-02 0.00e+00   50.570 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   41.376   -4.080   37.296
T90    36.536   -0.584   35.952
T50    24.432    4.280   28.712
Peak    1.000   21.712   22.712

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  271.4816  -3.8801 0.0176   16.9  -88.7       0.8462    10.9  TRIG_00505801       
------------------------------------------
 
Foreground time interval of the image:
 -4.080  37.296 (delta_t =  41.376 [sec])
Background time interval of the image:
-239.000  -4.080 (delta_t = 234.920 [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   -4.080 sec. to   37.296 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.17529     ( -0.259324   0.282504 )
Norm@50keV  : 1.03420E-03    ( -0.000203799   0.000199049 )
------------------------------------------------------------
# Chi-Squared =          52.42 using 59 PHA bins.
# Reduced chi-squared =         0.9197 for     57 degrees of freedom 
# Null hypothesis probability =   6.472794e-01
 
Photon flux (15-150 keV)    in 41.38 sec: 0.169021 ( -0.0229435  0.0229435 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.01021e-07 ( -6.74142e-08  7.00294e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -4.080 sec. to   37.296 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.31447     ( -1.72527   0.780921 )
Epeak [keV] : 29.4855      (   )
Norm@50keV  : 3.54950E-03    (     )
------------------------------------------------------------
# Chi-Squared =          51.03 using 59 PHA bins.
# Reduced chi-squared =         0.9112 for     56 degrees of freedom 
# Null hypothesis probability =   6.630680e-01
 
Photon flux (15-150 keV)    in 41.38 sec: 0.164348 ( -0.023637  0.023792 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.6305e-07 ( -7.32753e-08  8.73544e-08 ) ergs/cm2
 
Band function
Time interval is from   -4.080 sec. to   37.296 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.619384   ( 0.599664   0.599664 )
beta        : -2.58234    ( 2.57716   0.536828 )
Epeak [keV] : 28.2296      ( -28.1145 13.7775 )
Norm@50keV   : 1.13357E-02    ( -0.0128146   275.222 )
------------------------------------------------------------
# Chi-Squared =          50.40 using 59 PHA bins.
# Reduced chi-squared =         0.9164 for     55 degrees of freedom 
# Null hypothesis probability =   6.507628e-01
 
Photon flux (15-150 keV)    in 41.38 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 8.26601  (-1.17698  1.39036)
R^2/D10^2   : 0.164259  (-0.0759512   0.139116)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared =          57.23 using 59 PHA bins.
# Reduced chi-squared =          1.004 for     57 degrees of freedom 
# Null hypothesis probability =   4.663931e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.595e-08   2.158e-08
25- 50  1.591e-07   3.248e-08
50-150  4.647e-08   1.964e-08
15-150  2.915e-07   6.157e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 46.2312       (-14.2229      25.2311)
Norm        : 1.00382       (-0.222725     0.310455)
------------------------------------------------------------
# Chi-Squared =          51.01 using 59 PHA bins.
# Reduced chi-squared =         0.8949 for     57 degrees of freedom 
# Null hypothesis probability =   6.980464e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.962e-08   1.738e-08
25- 50  1.390e-07   2.443e-08
50-150  1.251e-07   4.895e-08
15-150  3.637e-07   7.171e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.18400        (-3.2524      2.13322)
R1^2/D10^2  : 0.406122        (-0.2534      5.28414)
kT2 [keV]   : 19.2895        (-13.5952      -19.4544)
R2^2/D10^2  : 3.08068E-03    (-0.0029696   0.0714779)
------------------------------------------------------------
# Chi-Squared =          50.79 using 59 PHA bins.
# Reduced chi-squared =         0.9235 for     55 degrees of freedom 
# Null hypothesis probability =   6.360454e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.834e-08   5.504e-08
25- 50  1.399e-07   7.409e-08
50-150  1.334e-07   8.288e-08
15-150  3.716e-07   1.880e-07

Peak spectrum fit

Power-law model
Time interval is from   21.712 sec. to   22.712 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.77588     ( -0.556621   0.595998 )
Norm@50keV  : 3.29120E-03    ( -0.00123596   0.00117844 )
------------------------------------------------------------
# Chi-Squared =          51.01 using 59 PHA bins.
# Reduced chi-squared =         0.8950 for     57 degrees of freedom 
# Null hypothesis probability =   6.979586e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.449350 ( -0.143344  0.143437 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.03286e-08 ( -1.10924e-08  1.16805e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   21.712 sec. to   22.712 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.60974E-02     ( 0.0387997   2.57468 )
Epeak [keV] : 41.5828      (   )
Norm@50keV  : 4.10681E-02    (     )
------------------------------------------------------------
# Chi-Squared =          50.57 using 59 PHA bins.
# Reduced chi-squared =         0.9031 for     56 degrees of freedom 
# Null hypothesis probability =   6.797281e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.414588 ( -0.14851  0.224343 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.27471e-08 ( -9.0227e-09  1.8015e-08 ) ergs/cm2
 
Band function
Time interval is from   21.712 sec. to   22.712 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 2.75699   ( -1.10064   -1.10064 )
beta        : -2.62872    ( 2.53672   1.14934 )
Epeak [keV] : 34.3713      ( -36.4123 34.8459 )
Norm@50keV   : 2.95546    ( -2.89708   46.6941 )
------------------------------------------------------------
# Chi-Squared =          49.57 using 59 PHA bins.
# Reduced chi-squared =         0.9013 for     55 degrees of freedom 
# Null hypothesis probability =   6.813547e-01
 
Photon flux (15-150 keV)    in 1 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 9.79391  (-2.577  3.87227)
R^2/D10^2   : 0.242075  (-0.242074   0.531514)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared =          50.59 using 59 PHA bins.
# Reduced chi-squared =         0.8876 for     57 degrees of freedom 
# Null hypothesis probability =   7.126155e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.694e-09   2.864e-09
25- 50  1.133e-08   6.855e-09
50-150  5.565e-09   3.809e-09
15-150  2.159e-08   1.405e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 87.3475       (-54.677      -87.3491)
Norm        : 2.07719       (-0.790022     1.40261)
------------------------------------------------------------
# Chi-Squared =          50.85 using 59 PHA bins.
# Reduced chi-squared =         0.8921 for     57 degrees of freedom 
# Null hypothesis probability =   7.037376e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.414e-09   3.341e-09
25- 50  9.097e-09   5.730e-09
50-150  1.360e-08   1.177e-08
15-150  2.811e-08   1.864e-08
Double BB
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 199.361        (      )
R1^2/D10^2  : 5.18800E-05        (-2.60791e-05      0.010358)
kT2 [keV]   : 8.60878        (-1.77598      3.23757)
R2^2/D10^2  : 0.359678    (-0.259485   0.838682)
------------------------------------------------------------
# Chi-Squared =          50.55 using 59 PHA bins.
# Chi-Squared =          47.47 using 59 PHA bins.
# Reduced chi-squared =         0.9192 for     55 degrees of freedom 
# Reduced chi-squared =         0.8632 for     55 degrees of freedom 
# Null hypothesis probability =   6.450085e-01
# Null hypothesis probability =   7.545148e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.719e-09   3.930e-06
25- 50  1.092e-08   3.243e-05
50-150  5.992e-09   8.025e-04
15-150  2.163e-08   8.060e-04
Plot creation:
Wed Oct 19 10:31:38 EDT 2011