batgrbproduct Analysis for Trigger=504101

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Tue Sep 27 08:10:22 EDT 2011
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger504101/GCN5_download_cron
======================================================================

  Trigger: 00504101      Segment: 000

  BAT Trigger Time: 338760696   [s; MET]
      Trigger Stop: 338760760   [s; MET]
               UTC: 2011-09-26T20:11:28.594000    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 258.160930132236   Dec: -37.6492068706881  [deg; J2000]

     Catalogged Source?: YES
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    16.08
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    16.08

  Flight Position:   [ source = BAT ]
    RA: 258.160930132236   Dec: -37.6492068706881  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 258.148414737648   Dec: -37.640193134663  [deg; J2000]  
        { 17h 12m 35.6s , -37d 38' 24.7" }
         +/- 1.39171753073932 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.413359159496046 [arcmin] (formal 1-sigma fit error)
    SNR: 18.9690413418876
 
  Angular difference between Flight and Ground position is 0.803760 arcmin
 
  Partial Coding Fraction: 1    [ including projection effects ]

  Duration
     T90: 188.535999953747 +/- 19.2663110410004
        Measured from: -46.6999998688698
                   to: 141.836000084877     [s; relative to TRIGTIME]
     T50: 94.6399999260902 +/- 8.21658443366115
        Measured from: 16.1000001430511
                   to: 110.740000069141     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 117.592000007629     
                   to: 118.592000007629     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -72.5320000052452     
                   to: 174.375999987125     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     4.885673   0.507081   0.059320   0.145698
           0.099219   0.087645   0.074326   0.066151 [error]
 Peak      0.041124   0.005659   0.008003   0.008957
           0.006589   0.005515   0.004777   0.004264 [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 1.47e-06 2.19e-07 1.49e-08 1.07e-09 1.71e-06 1.71e-06   erg/cm2
              Error 1.40e-07 3.85e-08 6.40e-09 7.97e-10 1.44e-07 1.44e-07   erg/cm2
Peak flux Power-law 4.20e-01 7.79e-02 6.99e-03 6.81e-04 5.05e-01 5.06e-01   ph/cm2/s
              Error 1.05e-01 5.46e-02 1.34e-02 3.14e-03 1.36e-01 1.37e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.49e-06 1.34e-07 5.92e-11 1.54e-18 1.63e-06 1.63e-06   erg/cm2
              Error 1.54e-07 4.51e-08 5.70e-10 4.66e-14 1.57e-07 1.57e-07   erg/cm2
Peak flux Cutoff-PL 4.20e-01 7.75e-02 6.91e-03 6.66e-04 5.05e-01 5.05e-01   ph/cm2/s
              Error 1.05e-01 5.63e-02 1.34e-02 3.06e-03 1.36e-01 1.36e-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 0.00e+00 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    5.881    0.374    -      -           6.31e-05 2.21e-05   67.440 57
CPL  -0.710    0.000       8.6    0.0      1.70e+01 0.00e+00   57.220 56
 
The chi2 of BB fit is 56.95 which shows a significant improvement in the fit over a PL.
Check the BB fit.
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    4.477    1.363    -      -           5.34e-04 7.83e-04   68.520 57
CPL   1.844    0.000       1.1    0.0      9.54e-02 0.00e+00   69.200 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  246.908  -72.532  174.376
T90   188.536  -46.700  141.836
T50    94.640   16.100  110.740
Peak    1.000  117.592  118.592

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  258.1484 -37.6402 0.0102    8.4  -48.1       2.2019    19.0  TRIG_00504101       
------------------------------------------
 
Foreground time interval of the image:
-18.499  51.980 (delta_t =  70.479 [sec])
 53.000  72.801 (delta_t =  19.801 [sec])
Background time interval of the image:

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
Multiple GTIs in the spectrum
tstart tstop
-72.532000 -55.879600
-55.000000 51.980000
53.000000 174.376000
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 5.88084     ( -0.369892   0.378295 )
Norm@50keV  : 6.30745E-05    ( -1.90802e-05   2.50823e-05 )
------------------------------------------------------------
# Chi-Squared =          67.44 using 59 PHA bins.
# Reduced chi-squared =          1.183 for     57 degrees of freedom 
# Null hypothesis probability =   1.621864e-01
 
Photon flux (15-150 keV)    in 245 sec: 0.230362 ( -0.0207723  0.0208596 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.70546e-06 ( -1.43851e-07  1.44203e-07 ) ergs/cm2
 
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-72.532000 -55.879600
-55.000000 51.980000
53.000000 174.376000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.710108     (     )
Epeak [keV] : 8.56344      (   )
Norm@50keV  : 16.9608    (     )
------------------------------------------------------------
# Chi-Squared =          57.22 using 59 PHA bins.
# Reduced chi-squared =          1.022 for     56 degrees of freedom 
# Null hypothesis probability =   4.294918e-01
 
Photon flux (15-150 keV)    in 245 sec: 0.223824 ( -0.023529  0.023004 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.62863e-06 ( -1.5837e-07  1.55205e-07 ) ergs/cm2
 
Band function
Multiple GTIs in the spectrum
tstart tstop
-72.532000 -55.879600
-55.000000 51.980000
53.000000 174.376000
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -9.08364   ( 0.40871   7.79437 )
beta        : -5.88086    ( -0.97535   -0.226664 )
Epeak [keV] : 369.075      ( -369.075 -369.075 )
Norm@50keV   : 8.57218E-03    ( -0.00259272   0.0034096 )
------------------------------------------------------------
# Chi-Squared =          67.44 using 59 PHA bins.
# Reduced chi-squared =          1.226 for     55 degrees of freedom 
# Null hypothesis probability =   1.210904e-01
 
Photon flux (15-150 keV)    in 245 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]    : 2.64173  (-0.173507  0.193037)
R^2/D10^2   : 75.2910  (-31.8396   54.5039)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared =          56.95 using 59 PHA bins.
# Reduced chi-squared =         0.9992 for     57 degrees of freedom 
# Null hypothesis probability =   4.768533e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.496e-06   2.501e-07
25- 50  1.368e-07   2.923e-08
50-150  7.308e-11   4.807e-11
15-150  1.633e-06   2.791e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 4.67730       (-0.454156      0.533817)
Norm        : 67.6710       (-24.7189     39.2598)
------------------------------------------------------------
# Chi-Squared =          58.63 using 59 PHA bins.
# Reduced chi-squared =          1.029 for     57 degrees of freedom 
# Null hypothesis probability =   4.155884e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.503e-06   2.092e-07
25- 50  1.627e-07   3.736e-08
50-150  5.957e-10   3.788e-10
15-150  1.666e-06   2.522e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 2.63119        (-0.175054      0.191533)
R1^2/D10^2  : 77.4148        (-30.1777      57.1593)
kT2 [keV]   : 165.716        (-101.623      -101.623)
R2^2/D10^2  : 4.03525E-06    (-3.69247e-06   0.0025774)
------------------------------------------------------------
# Chi-Squared =          53.50 using 59 PHA bins.
# Reduced chi-squared =         0.9728 for     55 degrees of freedom 
# Null hypothesis probability =   5.320112e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.498e-06   2.788e-07
25- 50  1.434e-07   3.379e-08
50-150  2.042e-07   1.796e-07
15-150  1.845e-06   3.810e-07

Peak spectrum fit

Power-law model
Time interval is from  117.592 sec. to  118.592 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 4.47706     ( -1.15765   1.5674 )
Norm@50keV  : 5.34441E-04    ( -0.00053438   0.00103195 )
------------------------------------------------------------
# Chi-Squared =          68.52 using 59 PHA bins.
# Reduced chi-squared =          1.202 for     57 degrees of freedom 
# Null hypothesis probability =   1.411959e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.505353 ( -0.136094  0.136446 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.6995e-08 ( -5.52271e-09  6.62238e-09 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  117.592 sec. to  118.592 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.84413     (     )
Epeak [keV] : 1.14770      (   )
Norm@50keV  : 9.53922E-02    (     )
------------------------------------------------------------
# Chi-Squared =          69.20 using 59 PHA bins.
# Reduced chi-squared =          1.236 for     56 degrees of freedom 
# Null hypothesis probability =   1.106610e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.504532 ( -0.135545  0.136701 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.70036e-08 ( -5.5383e-09  6.5451e-09 ) ergs/cm2
 
Band function
Time interval is from  117.592 sec. to  118.592 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -9.76567   ( 21.9999   21.9999 )
beta        : -4.47714    ( -1.56743   1.15882 )
Epeak [keV] : 2.04971      ( -2.04971 -2.04971 )
Norm@50keV   : 7.26324E-02    ( -0.0726285   0.140258 )
------------------------------------------------------------
# Chi-Squared =          68.52 using 59 PHA bins.
# Reduced chi-squared =          1.246 for     55 degrees of freedom 
# Null hypothesis probability =   1.041048e-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]    : 2.96506  (-0.7733  1.01226)
R^2/D10^2   : 74.4684  (-74.5141   505.422)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared =          69.81 using 59 PHA bins.
# Reduced chi-squared =          1.225 for     57 degrees of freedom 
# Null hypothesis probability =   1.187352e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.294e-08   7.575e-09
25- 50  1.810e-09   1.227e-09
50-150  2.650e-12   3.086e-12
15-150  1.475e-08   8.705e-09
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 6.32145       (-2.46146      4.73161)
Norm        : 52.6629       (-52.6669     227.264)
------------------------------------------------------------
# Chi-Squared =          69.28 using 59 PHA bins.
# Reduced chi-squared =          1.215 for     57 degrees of freedom 
# Null hypothesis probability =   1.275436e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.269e-08   7.165e-09
25- 50  2.611e-09   1.713e-09
50-150  3.905e-11   4.459e-11
15-150  1.534e-08   8.870e-09
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 2.87417        (-0.746059      0.76805)
R1^2/D10^2  : 89.1579        (-73.0383      644.087)
kT2 [keV]   : 197.968        (-116.558      -116.559)
R2^2/D10^2  : 7.11238E-05    (-4.44595e-05   0.00471434)
------------------------------------------------------------
# Chi-Squared =          62.48 using 59 PHA bins.
# Reduced chi-squared =          1.136 for     55 degrees of freedom 
# Null hypothesis probability =   2.277934e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.280e-08   7.290e-09
25- 50  2.359e-09   1.059e-09
50-150  1.866e-08   3.246e-09
15-150  3.382e-08   8.830e-09
Plot creation:
Tue Sep 27 08:32:41 EDT 2011