batgrbproduct Analysis for Trigger=515976

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Fri Feb 24 18:23:10 EST 2012
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger515976/GCN5_download_cron
======================================================================

  Trigger: 00515976      Segment: 000

  BAT Trigger Time: 351751204.416   [s; MET]
      Trigger Stop: 351751208.512   [s; MET]
               UTC: 2012-02-24T04:39:56.492380    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 40.9754640993993   Dec: -17.7926294691115  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.8
     Image Trigger?:     NO
     Rate S/N Ratio:     9.8488578017961  [ if not an image trigger ]
     Image S/N Ratio:    7.8

  Flight Position:   [ source = BAT ]
    RA: 40.9754640993993   Dec: -17.7926294691115  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 40.9380572321283   Dec: -17.7787550117379  [deg; J2000]  
        { 02h 43m 45.1s , -17d 46' 43.5" }
         +/- 2.3689325477731 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.21345333661909 [arcmin] (formal 1-sigma fit error)
    SNR: 8.87244062102768
 
  Angular difference between Flight and Ground position is 2.293551 arcmin
 
  Partial Coding Fraction: 0.296875    [ including projection effects ]

  Duration
     T90: 8.12800002098083 +/- 2.10520116432153
        Measured from: -0.631999909877777
                   to: 7.49600011110306     [s; relative to TRIGTIME]
     T50: 3.58400005102158 +/- 1.8822964763074
        Measured from: 0.456000089645386
                   to: 4.04000014066696     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.244000017642975     
                   to: 1.24400001764297     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -1.0799999833107     
                   to: 8.26399999856949     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.172574   0.214521   0.049482   0.033634
           0.028082   0.029066   0.025846   0.024049 [error]
 Peak      0.035665   0.050076   0.010385   0.016834
           0.009608   0.010297   0.008411   0.007872 [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 6.54e-08 7.64e-08 6.42e-08 9.13e-08 2.39e-07 2.97e-07   erg/cm2
              Error 1.45e-08 1.45e-08 2.32e-08 6.31e-08 5.37e-08 9.38e-08   erg/cm2
Peak flux Power-law 4.00e-01 2.95e-01 1.45e-01 1.01e-01 8.87e-01 9.40e-01   ph/cm2/s
              Error 1.47e-01 8.34e-02 6.54e-02 8.55e-02 2.49e-01 2.67e-01   ph/cm2/s
 
Fluence   Cutoff-PL 6.18e-08 8.64e-08 5.71e-08 1.67e-08 2.22e-07 0.00e+00   erg/cm2
              Error 1.64e-08 2.12e-08 2.79e-08 7.15e-08 9.88e-08 0.00e+00   erg/cm2
Peak flux Cutoff-PL 3.70e-01 3.90e-01 8.83e-02 2.19e-03 8.50e-01 8.50e-01   ph/cm2/s
              Error 1.63e-01 1.36e-01 9.72e-02 3.99e-02 2.44e-01 2.44e-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    2.250    0.360    -      -           2.70e-03 7.15e-04   48.110 57
CPL   1.187    1.709      29.2    0.0      1.20e-02 0.00e+00   46.830 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.029    0.493    -      -           5.83e-03 2.07e-03   59.320 57
CPL  -0.414    4.899      34.2    0.0      2.23e-01 1.49e+04   57.200 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    9.344   -1.080    8.264
T90     8.128   -0.632    7.496
T50     3.584    0.456    4.040
Peak    1.000    0.244    1.244

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
   40.9381 -17.7788 0.0216   35.6 -113.5       0.5200     8.9  TRIG_00515976       
------------------------------------------
 
Foreground time interval of the image:
 -1.080   8.264 (delta_t =   9.344 [sec])
Background time interval of the image:
-239.416  -1.080 (delta_t = 238.336 [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   -1.080 sec. to    8.264 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.24996     ( -0.335215   0.385102 )
Norm@50keV  : 2.69756E-03    ( -0.000726362   0.000704396 )
------------------------------------------------------------
# Chi-Squared =          48.11 using 59 PHA bins.
# Reduced chi-squared =         0.8439 for     57 degrees of freedom 
# Null hypothesis probability =   7.931822e-01
 
Photon flux (15-150 keV)    in 9.344 sec: 0.458652 ( -0.0800691  0.0800833 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.38791e-07 ( -5.23284e-08  5.50681e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -1.080 sec. to    8.264 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.18722     ( -2.20574   1.21306 )
Epeak [keV] : 29.2194      (   )
Norm@50keV  : 1.20275E-02    (     )
------------------------------------------------------------
# Chi-Squared =          46.83 using 59 PHA bins.
# Reduced chi-squared =         0.8363 for     56 degrees of freedom 
# Null hypothesis probability =   8.036785e-01
 
Photon flux (15-150 keV)    in 9.344 sec: 0.446411 ( -0.040611  0.081699 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.22043e-07 ( -5.08678e-08  1.46747e-07 ) ergs/cm2
 
Band function
Time interval is from   -1.080 sec. to    8.264 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.23268   ( 1.23271   1.57062 )
beta        : -9.37163    ( 9.99997   20 )
Epeak [keV] : 29.0266      ( -9.98605 20.3213 )
Norm@50keV   : 1.12279E-02    ( -0.0112318   1.99753e+06 )
------------------------------------------------------------
# Chi-Squared =          46.83 using 59 PHA bins.
# Reduced chi-squared =         0.8515 for     55 degrees of freedom 
# Null hypothesis probability =   7.753052e-01
 
Photon flux (15-150 keV)    in 9.344 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]    : 9.01701  (-1.55811  1.78138)
R^2/D10^2   : 0.322573  (-0.164542   0.352959)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared =          50.58 using 59 PHA bins.
# Reduced chi-squared =         0.8874 for     57 degrees of freedom 
# Null hypothesis probability =   7.130874e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.776e-08   1.443e-08
25- 50  1.018e-07   2.987e-08
50-150  3.906e-08   1.883e-08
15-150  1.886e-07   5.387e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 43.8301       (-15.767      30.4642)
Norm        : 2.82524       (-0.764974     1.15467)
------------------------------------------------------------
# Chi-Squared =          46.87 using 59 PHA bins.
# Reduced chi-squared =         0.8223 for     57 degrees of freedom 
# Null hypothesis probability =   8.284520e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.238e-08   1.456e-08
25- 50  8.525e-08   2.252e-08
50-150  7.268e-08   3.952e-08
15-150  2.203e-07   6.190e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 2.65365        (-1.1985      1.87462)
R1^2/D10^2  : 38.3293        (-36.0498      3571.79)
kT2 [keV]   : 10.8275        (-2.15897      3.26202)
R2^2/D10^2  : 0.136445    (-0.0931016   0.208007)
------------------------------------------------------------
# Chi-Squared =          44.11 using 59 PHA bins.
# Reduced chi-squared =         0.8020 for     55 degrees of freedom 
# Null hypothesis probability =   8.534951e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.110e-08   3.150e-08
25- 50  8.902e-08   5.195e-08
50-150  5.641e-08   3.719e-08
15-150  2.065e-07   1.083e-07

Peak spectrum fit

Power-law model
Time interval is from    0.244 sec. to    1.244 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.02873     ( -0.461919   0.523218 )
Norm@50keV  : 5.83172E-03    ( -0.00210736   0.00203566 )
------------------------------------------------------------
# Chi-Squared =          59.32 using 59 PHA bins.
# Reduced chi-squared =          1.041 for     57 degrees of freedom 
# Null hypothesis probability =   3.909617e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.886512 ( -0.248856  0.248863 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.38749e-08 ( -1.76226e-08  1.85569e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.244 sec. to    1.244 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.414265     ( -7.25692   2.54077 )
Epeak [keV] : 34.1767      ( -34.0987 -34.0987 )
Norm@50keV  : 0.222928    ( -0.264754   29771.1 )
------------------------------------------------------------
# Chi-Squared =          57.20 using 59 PHA bins.
# Reduced chi-squared =          1.021 for     56 degrees of freedom 
# Null hypothesis probability =   4.302867e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.849749 ( -0.241751  0.245851 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.24199e-08 ( -1.42999e-08  4.68674e-08 ) ergs/cm2
 
Band function
Time interval is from    0.244 sec. to    1.244 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.99685   ( -617.429   -607.429 )
beta        : -2.74011    ( -1.96606   0.810272 )
Epeak [keV] : 26.9111      ( -8.07637 7.70646 )
Norm@50keV   : 718.366    ( -718.358   6715.27 )
------------------------------------------------------------
# Chi-Squared =          55.57 using 59 PHA bins.
# Reduced chi-squared =          1.010 for     55 degrees of freedom 
# Null hypothesis probability =   4.529744e-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]    : 8.52162  (-2.03869  2.74761)
R^2/D10^2   : 0.829637  (-0.559369   1.58956)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared =          57.34 using 59 PHA bins.
# Reduced chi-squared =          1.006 for     57 degrees of freedom 
# Null hypothesis probability =   4.624692e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.137e-08   6.732e-09
25- 50  2.215e-08   1.331e-08
50-150  7.128e-09   5.380e-09
15-150  4.065e-08   2.493e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 52.3534       (-25.8786      92.9659)
Norm        : 5.03902       (-1.9243     3.18597)
------------------------------------------------------------
# Chi-Squared =          58.21 using 59 PHA bins.
# Reduced chi-squared =          1.021 for     57 degrees of freedom 
# Null hypothesis probability =   4.306510e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.245e-08   6.014e-09
25- 50  1.817e-08   8.319e-09
50-150  1.841e-08   1.294e-08
15-150  4.902e-08   2.609e-08
Double BB
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.91753        (-8.28157      2.23191)
R1^2/D10^2  : 1.05615        (-0.497567      2.29412)
kT2 [keV]   : 200.000        (      )
R2^2/D10^2  : 5.93069E-05    (-5.93069e-05   7.11553e-05)
------------------------------------------------------------
# Chi-Squared =          55.61 using 59 PHA bins.
# Chi-Squared =          55.52 using 59 PHA bins.
# Reduced chi-squared =          1.011 for     55 degrees of freedom 
# Reduced chi-squared =          1.009 for     55 degrees of freedom 
# Null hypothesis probability =   4.517795e-01
# Null hypothesis probability =   4.551667e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.127e-08   6.665e-09
25- 50  2.146e-08   1.325e-08
50-150  2.015e-08   5.735e-09
15-150  5.288e-08   2.444e-08
Plot creation:
Fri Feb 24 18:45:37 EST 2012