batgrbproduct Analysis for Trigger=412982

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Tue May 10 13:31:48 EDT 2011
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger412982/SDC
======================================================================

  Trigger: 00412982      Segment: 000

  BAT Trigger Time: 288285352   [s; MET]
      Trigger Stop: 288285416   [s; MET]
               UTC: 2010-02-19T15:15:46.455360    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 154.220640694763   Dec: -12.559076333116  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.44
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    7.44

  Flight Position:   [ source = BAT ]
    RA: 154.220640694763   Dec: -12.559076333116  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 154.195075053118   Dec: -12.5707911558948  [deg; J2000]  
        { 10h 16m 46.8s , -12d 34' 14.8" }
         +/- 2.1590552232775 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.0776577745162 [arcmin] (formal 1-sigma fit error)
    SNR: 10.1297502098704
 
  Angular difference between Flight and Ground position is 1.653984 arcmin
 
  Partial Coding Fraction: 0.7109375    [ including projection effects ]

  Duration
     T90: 22.1719999313354 +/- 6.64771150189809
        Measured from: 20.1240000128746
                   to: 42.2959999442101     [s; relative to TRIGTIME]
     T50: 11.7119999527931 +/- 4.22362307038684
        Measured from: 22.7799999713898
                   to: 34.4919999241829     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 31.8920000195503     
                   to: 32.8920000195503     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 13.3040000200272     
                   to: 43.2760000228882     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.128514   0.241406   0.191405   0.049529
           0.030509   0.030513   0.027179   0.023686 [error]
 Peak      0.013997   0.019870   0.012879   0.006153
           0.005537   0.005570   0.004939   0.004187 [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 4.30e-08 9.23e-08 1.56e-07 6.03e-07 4.28e-07 8.94e-07   erg/cm2
              Error 1.15e-08 1.48e-08 2.63e-08 2.31e-07 6.64e-08 2.47e-07   erg/cm2
Peak flux Power-law 1.28e-01 1.33e-01 9.73e-02 1.14e-01 4.03e-01 4.73e-01   ph/cm2/s
              Error 7.21e-02 4.66e-02 4.08e-02 1.05e-01 1.32e-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 1.28e-01 1.33e-01 9.74e-02 1.14e-01 4.04e-01 4.70e-01   ph/cm2/s
              Error 7.21e-02 3.90e-02 4.12e-02 1.06e-01 1.32e-01 1.58e-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    1.244    0.250    -      -           1.43e-03 2.00e-04   57.180 57
CPL   2.027    0.000      10.2    0.0      4.45e-04 0.00e+00   56.750 56
 
The chi2 of BB fit is  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    1.451    0.610    -      -           3.27e-03 1.10e-03   84.340 57
CPL   1.456    0.613    9999.3    0.0      3.26e-03 4.84e-02   84.340 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: 18.240000 sec.
T50 in the 50-300 keV band: 6.144000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   29.972   13.304   43.276
T90    22.172   20.124   42.296
T50    11.712   22.780   34.492
Peak    1.000   31.892   32.892

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  154.1951 -12.5708 0.0190   25.4   32.3       0.5836    10.1  TRIG_00412982       
------------------------------------------
 
Foreground time interval of the image:
 13.304  43.276 (delta_t =  29.972 [sec])
Background time interval of the image:
-239.000  13.304 (delta_t = 252.304 [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   13.304 sec. to   43.276 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.24432     ( -0.252019   0.247228 )
Norm@50keV  : 1.42587E-03    ( -0.000199618   0.000199612 )
------------------------------------------------------------
# Chi-Squared =          57.18 using 59 PHA bins.
# Reduced chi-squared =          1.003 for     57 degrees of freedom 
# Null hypothesis probability =   4.685590e-01
 
Photon flux (15-150 keV)    in 29.97 sec: 0.168486 ( -0.0244045  0.0245109 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.2831e-07 ( -6.60982e-08  6.68004e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   13.304 sec. to   43.276 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.02718     (     )
Epeak [keV] : 10.1843      (   )
Norm@50keV  : 4.44555E-04    (     )
------------------------------------------------------------
# Chi-Squared =          56.75 using 59 PHA bins.
# Reduced chi-squared =          1.013 for     56 degrees of freedom 
# Null hypothesis probability =   4.469256e-01
 
Photon flux (15-150 keV)    in 29.97 sec: 0.167065 ( -0.025244  0.025189 ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 
Band function
Time interval is from   13.304 sec. to   43.276 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.37339E-02   ( 0.706443   5.67062 )
beta        : -1.36963    ( 1.30035   0.290435 )
Epeak [keV] : 57.3303      ( -56.8136 501.024 )
Norm@50keV   : 8.06576E-03    ( -0.00829953   223.85 )
------------------------------------------------------------
# Chi-Squared =          56.62 using 59 PHA bins.
# Reduced chi-squared =          1.030 for     55 degrees of freedom 
# Null hypothesis probability =   4.141571e-01
 
Photon flux (15-150 keV)    in 29.97 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]    :   (  )
R^2/D10^2   :   (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25     
25- 50     
50-150     
15-150     
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    :        (      )
Norm        :        (     )
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25     
25- 50     
50-150     
15-150     
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   :         (      )
R1^2/D10^2  :         (      )
kT2 [keV]   :         (      )
R2^2/D10^2  :     (   )
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25     
25- 50     
50-150     
15-150     

Peak spectrum fit

Power-law model
Time interval is from   31.892 sec. to   32.892 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.45119     ( -0.61418   0.606345 )
Norm@50keV  : 3.26798E-03    ( -0.0011117   0.00108094 )
------------------------------------------------------------
# Chi-Squared =          84.34 using 59 PHA bins.
# Reduced chi-squared =          1.480 for     57 degrees of freedom 
# Null hypothesis probability =   1.077819e-02
 
Photon flux (15-150 keV)    in 1 sec: 0.402851 ( -0.132105  0.132521 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.12652e-08 ( -1.13957e-08  1.18327e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   31.892 sec. to   32.892 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.45649     ( -0.624793   0.602205 )
Epeak [keV] : 9999.34      ( -9979.6 -9979.6 )
Norm@50keV  : 3.26424E-03    ( -0.00327507   0.0935178 )
------------------------------------------------------------
# Chi-Squared =          84.34 using 59 PHA bins.
# Reduced chi-squared =          1.506 for     56 degrees of freedom 
# Null hypothesis probability =   8.505072e-03
 
Photon flux (15-150 keV)    in 1 sec: 0.403639 ( -0.132801  0.131411 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.12952e-08 ( -1.27868e-08  1.17533e-08 ) ergs/cm2
 
Band function
Time interval is from   31.892 sec. to   32.892 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.99943   ( -3348.64   -3348.64 )
beta        : -1.73065    ( -1.52095   0.808242 )
Epeak [keV] : 28.9085      ( -28.9085 13.9639 )
Norm@50keV   : 148.523    ( -148.524   2.76875e+06 )
------------------------------------------------------------
# Chi-Squared =          83.71 using 59 PHA bins.
# Reduced chi-squared =          1.522 for     55 degrees of freedom 
# Null hypothesis probability =   7.557472e-03
 
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]    :   (  )
R^2/D10^2   :   (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25     
25- 50     
50-150     
15-150     
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    :        (      )
Norm        :        (     )
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25     
25- 50     
50-150     
15-150     
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   :         (      )
R1^2/D10^2  :         (      )
kT2 [keV]   :         (      )
R2^2/D10^2  :     (   )
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25     
25- 50     
50-150     
15-150     
Plot creation:
Thu May 26 14:15:14 EDT 2011