batgrbproduct Analysis for Trigger=518792

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Wed Mar 28 12:14:45 EDT 2012
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger518792/GCN5_download_cron
======================================================================

  Trigger: 00518792      Segment: 000

  BAT Trigger Time: 354596787.072   [s; MET]
      Trigger Stop: 354596788.48   [s; MET]
               UTC: 2012-03-28T03:06:19.032840    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 241.549796791991   Dec: -39.3402511024914  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    6.57
     Image Trigger?:     NO
     Rate S/N Ratio:     13.1909059582729  [ if not an image trigger ]
     Image S/N Ratio:    6.57

  Flight Position:   [ source = BAT ]
    RA: 241.549796791991   Dec: -39.3402511024914  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 241.607527845859   Dec: -39.3224849165837  [deg; J2000]  
        { 16h 06m 25.8s , -39d 19' 20.9" }
         +/- 1.77400877399045 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.729268120563321 [arcmin] (formal 1-sigma fit error)
    SNR: 13.4111891973426
 
  Angular difference between Flight and Ground position is 2.883541 arcmin
 
  Partial Coding Fraction: 1.015625    [ including projection effects ]

  Duration
     T90: 24.1719999909401 +/- 6.76263765547588
        Measured from: -15.9039999246597
                   to: 8.26800006628036     [s; relative to TRIGTIME]
     T50: 12.3599999547005 +/- 2.96982153933694
        Measured from: -10.8999999165535
                   to: 1.46000003814697     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.107999980449677     
                   to: 1.10799998044968     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -17.272000014782     
                   to: 20.6119999885559     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.300645   0.385908   0.185568   0.065618
           0.038048   0.033101   0.027731   0.023923 [error]
 Peak      0.028897   0.031704   0.032004   0.006989
           0.006375   0.005851   0.004905   0.004076 [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 9.32e-08 1.37e-07 1.50e-07 3.07e-07 4.74e-07 6.87e-07   erg/cm2
              Error 1.52e-08 1.49e-08 2.58e-08 1.07e-07 6.02e-08 1.33e-07   erg/cm2
Peak flux Power-law 2.26e-01 2.42e-01 1.83e-01 2.26e-01 7.37e-01 8.78e-01   ph/cm2/s
              Error 7.52e-02 4.81e-02 4.00e-02 1.06e-01 1.35e-01 1.58e-01   ph/cm2/s
 
Fluence   Cutoff-PL 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 Cutoff-PL 2.21e-01 2.44e-01 1.85e-01 2.00e-01 7.33e-01 8.49e-01   ph/cm2/s
              Error 8.69e-02 5.15e-02 4.42e-02 1.73e-01 1.40e-01 2.01e-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 8.26e-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    1.870    0.198    -      -           1.36e-03 1.72e-04   78.270 57
CPL   0.873    1.055      46.2   35.3      5.17e-03 1.31e-02   74.840 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.400    0.326    -      -           6.06e-03 1.07e-03   63.110 57
CPL   1.180    0.000     199.7    0.0      7.70e-03 0.00e+00   63.110 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: 18.624000 sec.
T50 in the 50-300 keV band: 13.760000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   37.884  -17.272   20.612
T90    24.172  -15.904    8.268
T50    12.360  -10.900    1.460
Peak    1.000    0.108    1.108

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  241.6075 -39.3225 0.0144   10.8    2.1       0.9223    13.4  TRIG_00518792       
------------------------------------------
 
Foreground time interval of the image:
-17.272  20.612 (delta_t =  37.884 [sec])
Background time interval of the image:
-239.072 -17.272 (delta_t = 221.800 [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  -17.272 sec. to   20.612 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.87027     ( -0.19467   0.200961 )
Norm@50keV  : 1.36045E-03    ( -0.00017384   0.000171012 )
------------------------------------------------------------
# Chi-Squared =          78.27 using 59 PHA bins.
# Reduced chi-squared =          1.373 for     57 degrees of freedom 
# Null hypothesis probability =   3.228863e-02
 
Photon flux (15-150 keV)    in 37.88 sec: 0.192821 ( -0.0211978  0.0212191 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.73758e-07 ( -5.95799e-08  6.07902e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  -17.272 sec. to   20.612 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.873244     ( -1.18867   0.921199 )
Epeak [keV] : 46.1752      ( -10.3005 60.26 )
Norm@50keV  : 5.17116E-03    ( -0.00517396   0.0209944 )
------------------------------------------------------------
# Chi-Squared =          74.84 using 59 PHA bins.
# Reduced chi-squared =          1.336 for     56 degrees of freedom 
# Null hypothesis probability =   4.708985e-02
 
Photon flux (15-150 keV)    in 37.88 sec: 0.184639 ( -0.022344  0.022446 ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 
Band function
Time interval is from  -17.272 sec. to   20.612 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 2.49110   ( -2.05561   -1.20171 )
beta        : -2.33243    ( -0.488638   0.375452 )
Epeak [keV] : 31.3654      ( -7.53183 9.19358 )
Norm@50keV   : 1.16904    ( -1.12077   29.2985 )
------------------------------------------------------------
# Chi-Squared =          71.08 using 59 PHA bins.
# Reduced chi-squared =          1.292 for     55 degrees of freedom 
# Null hypothesis probability =   7.112415e-02
 
Photon flux (15-150 keV)    in 37.88 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]    : 10.2284  (-1.22235  1.43019)
R^2/D10^2   : 8.33471E-02  (-0.0330873   0.0530795)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared =          84.09 using 59 PHA bins.
# Reduced chi-squared =          1.475 for     57 degrees of freedom 
# Null hypothesis probability =   1.130936e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.776e-08   1.320e-08
25- 50  1.739e-07   2.307e-08
50-150  9.685e-08   2.868e-08
15-150  3.385e-07   4.798e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 78.1291       (-23.3171      43.5012)
Norm        : 0.915424       (-0.143831     0.182348)
------------------------------------------------------------
# Chi-Squared =          75.28 using 59 PHA bins.
# Reduced chi-squared =          1.321 for     57 degrees of freedom 
# Null hypothesis probability =   5.279122e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.984e-08   1.438e-08
25- 50  1.470e-07   1.881e-08
50-150  2.043e-07   8.460e-08
15-150  4.411e-07   8.148e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.30161        (-1.90578      2.26311)
R1^2/D10^2  : 0.228279        (-0.103798      0.207397)
kT2 [keV]   : 23.9236        (-9.75722      -24.3624)
R2^2/D10^2  : 1.94351E-03    (-0.00182783   0.00535833)
------------------------------------------------------------
# Chi-Squared =          72.03 using 59 PHA bins.
# Reduced chi-squared =          1.310 for     55 degrees of freedom 
# Null hypothesis probability =   6.142278e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.470e-08   3.656e-08
25- 50  1.561e-07   7.579e-08
50-150  1.992e-07   1.098e-07
15-150  4.400e-07   1.910e-07

Peak spectrum fit

Power-law model
Time interval is from    0.108 sec. to    1.108 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.39989     ( -0.325854   0.325558 )
Norm@50keV  : 6.05529E-03    ( -0.00107493   0.00107096 )
------------------------------------------------------------
# Chi-Squared =          63.11 using 59 PHA bins.
# Reduced chi-squared =          1.107 for     57 degrees of freedom 
# Null hypothesis probability =   2.693438e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.737404 ( -0.134143  0.134971 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.8511e-08 ( -1.14123e-08  1.15896e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.108 sec. to    1.108 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.17962     (     )
Epeak [keV] : 199.745      (   )
Norm@50keV  : 7.70351E-03    (     )
------------------------------------------------------------
# Chi-Squared =          63.11 using 59 PHA bins.
# Reduced chi-squared =          1.127 for     56 degrees of freedom 
# Null hypothesis probability =   2.396607e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.732902 ( -0.141301  0.137903 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.00301e-07 ( -4.70558e-08  5.1878e-08 ) ergs/cm2
 
Band function
Time interval is from    0.108 sec. to    1.108 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.21529   ( 1.21586   0.941146 )
beta        : -9.37165    ( 9.99998   20 )
Epeak [keV] : 235.100      ( -235.355 -235.355 )
Norm@50keV   : 7.36588E-03    ( -0.00236044   0.00911655 )
------------------------------------------------------------
# Chi-Squared =          63.09 using 59 PHA bins.
# Reduced chi-squared =          1.147 for     55 degrees of freedom 
# Null hypothesis probability =   2.120365e-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]    : 18.6741  (-4.05216  5.30293)
R^2/D10^2   : 3.95901E-02  (-0.0223712   0.0511276)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared =          71.26 using 59 PHA bins.
# Reduced chi-squared =          1.250 for     57 degrees of freedom 
# Null hypothesis probability =   9.684978e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.730e-09   1.239e-09
25- 50  1.297e-08   4.772e-09
50-150  3.313e-08   1.151e-08
15-150  4.883e-08   1.467e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.361       (-85.0307      -199.871)
Norm        : 3.04444       (-0.536405     0.537873)
------------------------------------------------------------
# Chi-Squared =          63.95 using 59 PHA bins.
# Reduced chi-squared =          1.122 for     57 degrees of freedom 
# Null hypothesis probability =   2.458233e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.581e-09   4.168e-09
25- 50  1.458e-08   7.950e-09
50-150  3.198e-08   1.786e-08
15-150  5.415e-08   2.999e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.56266        (-2.30041      2.94722)
R1^2/D10^2  : 1.69157        (-1.3971      6.26359)
kT2 [keV]   : 26.0379        (-6.91206      14.3318)
R2^2/D10^2  : 1.14220E-02    (-0.00867071   0.0160815)
------------------------------------------------------------
# Chi-Squared =          61.00 using 59 PHA bins.
# Reduced chi-squared =          1.109 for     55 degrees of freedom 
# Null hypothesis probability =   2.691604e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.503e-09   4.344e-09
25- 50  1.283e-08   6.935e-09
50-150  3.838e-08   2.321e-08
15-150  5.871e-08   3.172e-08
Plot creation:
Wed Mar 28 12:29:48 EDT 2012