batgrbproduct Analysis for Trigger=586998

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Tue Feb 18 05:33:46 EST 2014
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger586998/GCN5_download_cron
======================================================================

  Trigger: 00586998      Segment: 000

  BAT Trigger Time: 414375036.224   [s; MET]
      Trigger Stop: 414375037.248   [s; MET]
               UTC: 2014-02-18T00:10:24.565820    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 266.12964477407   Dec: -28.7397154083901  [deg; J2000]

     Catalogged Source?: YES
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    16.41
     Image Trigger?:     NO
     Rate S/N Ratio:     30.9515750810843  [ if not an image trigger ]
     Image S/N Ratio:    16.41

  Flight Position:   [ source = BAT ]
    RA: 266.12964477407   Dec: -28.7397154083901  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 266.133049919437   Dec: -28.7442590795864  [deg; J2000]  
        { 17h 44m 31.9s , -28d 44' 39.3" }
         +/- 1.12968168278388 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.451752048026331 [arcmin] (formal 1-sigma fit error)
    SNR: 25.554467004518
 
  Angular difference between Flight and Ground position is 0.326208 arcmin
 
  Partial Coding Fraction: 1    [ including projection effects ]

  Duration
     T90: 12.4679999947548 +/- 2.23896586640093
        Measured from: -0.851999878883362
                   to: 11.6160001158714     [s; relative to TRIGTIME]
     T50: 4.92799997329712 +/- 1.04712367451868
        Measured from: 0.620000123977661
                   to: 5.54800009727478     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.0320000052452087     
                   to: 1.03200000524521     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -1.51199996471405     
                   to: 16.2200000286102     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.054505   0.444446   0.008020   0.010329
           0.034494   0.029273   0.022443   0.018852 [error]
 Peak      0.177997   0.090773   0.003348  -0.004997
           0.009746   0.007852   0.005391   0.004376 [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 3.25e-07 1.66e-07 5.21e-08 2.10e-08 5.55e-07 5.64e-07   erg/cm2
              Error 2.72e-08 1.59e-08 1.11e-08 7.89e-09 3.99e-08 4.17e-08   erg/cm2
Peak flux Power-law 1.85e+00 5.91e-01 1.05e-01 2.16e-02 2.56e+00 2.57e+00   ph/cm2/s
              Error 1.99e-01 7.22e-02 2.76e-02 9.75e-03 2.38e-01 2.38e-01   ph/cm2/s
 
Fluence   Cutoff-PL 3.11e-07 1.73e-07 1.28e-08 4.51e-11 4.97e-07 4.97e-07   erg/cm2
              Error 3.00e-08 1.94e-08 9.86e-09 2.87e-10 3.94e-08 3.94e-08   erg/cm2
Peak flux Cutoff-PL 1.74e+00 6.78e-01 2.53e-02 2.43e-05 2.45e+00 2.45e+00   ph/cm2/s
              Error 2.25e-01 9.37e-02 2.13e-02 2.42e-04 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    3.669    0.196    -      -           1.79e-03 2.89e-04   65.140 57
CPL   1.000    0.000      50.0    0.0      9.22e-03 0.00e+00  332.780 56
 
The chi2 of BB fit is 49.28 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    3.497    0.242    -      -           6.35e-03 1.32e-03   78.930 57
CPL   1.000    0.000      50.0    0.0      3.08e-02 0.00e+00  230.120 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   17.732   -1.512   16.220
T90    12.468   -0.852   11.616
T50     4.928    0.620    5.548
Peak    1.000    0.032    1.032

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  266.1330 -28.7443 0.0075    0.4  127.9       1.3957    25.6  TRIG_00586998       
------------------------------------------
 
Foreground time interval of the image:
 -1.512  16.220 (delta_t =  17.732 [sec])
Background time interval of the image:
-119.224  -1.512 (delta_t = 117.712 [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   -1.512 sec. to   16.220 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 3.66877     ( -0.191681   0.201053 )
Norm@50keV  : 1.78655E-03    ( -0.000281245   0.000297727 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.14 using 59 PHA bins.
# Reduced chi-squared =          1.143 for     57 degrees of freedom 
# Null hypothesis probability =   2.146660e-01
 
Photon flux (15-150 keV)    in 17.73 sec: 0.830205 ( -0.0594288  0.0595569 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.5474e-07 ( -3.98349e-08  4.00102e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -1.512 sec. to   16.220 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.00000     (     )
Epeak [keV] : 50.0000      (   )
Norm@50keV  : 9.22242E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         332.78 using 59 PHA bins.
# Reduced chi-squared =         5.9425 for     56 degrees of freedom 
# Null hypothesis probability =   5.588549e-41
 
Photon flux (15-150 keV)    in 17.73 sec: 0.780298 ( -0.063354  0.063125 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.96699e-07 ( -3.9045e-08  3.97897e-08 ) ergs/cm2
 
Band function
Time interval is from   -1.512 sec. to   16.220 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.574361   ( -1.1215   2.97055 )
beta        : -9.37167    ( 9.37167   19.344 )
Epeak [keV] : 12.5534      ( -5.71595 5.28542 )
Norm@50keV   : 0.304459    ( -0.338972   29.7317 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          45.19 using 59 PHA bins.
# Reduced chi-squared =         0.8217 for     55 degrees of freedom 
# Null hypothesis probability =   8.244631e-01
 
Photon flux (15-150 keV)    in 17.73 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]    : 4.70909  (-0.308149  0.331005)
R^2/D10^2   : 8.83598  (-2.68044   3.91836)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.28 using 59 PHA bins.
# Reduced chi-squared =         0.8646 for     57 degrees of freedom 
# Null hypothesis probability =   7.564745e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.979e-07   3.360e-08
25- 50  1.673e-07   2.003e-08
50-150  5.046e-09   1.933e-09
15-150  4.703e-07   4.335e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 12.1029       (-1.33553      1.62496)
Norm        : 19.6115       (-4.03992     5.31942)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.32 using 59 PHA bins.
# Reduced chi-squared =         0.8126 for     57 degrees of freedom 
# Null hypothesis probability =   8.430631e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.170e-07   2.970e-08
25- 50  1.731e-07   2.019e-08
50-150  1.925e-08   6.647e-09
15-150  5.094e-07   4.335e-08
Double BB
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.06142        (-2.3102      8.10433)
R1^2/D10^2  : 1.49202        (-16.5138      21821.3)
kT2 [keV]   : 3.36960        (      )
R2^2/D10^2  : 27.4094    (-20.4235   18535)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          45.03 using 59 PHA bins.
#Fit statistic : Chi-Squared =          44.98 using 59 PHA bins.
# Reduced chi-squared =         0.8187 for     55 degrees of freedom 
# Reduced chi-squared =         0.8179 for     55 degrees of freedom 
# Null hypothesis probability =   8.290520e-01
# Null hypothesis probability =   8.303599e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.121e-07   1.673e-07
25- 50  1.724e-07   8.505e-08
50-150  1.405e-08   8.596e-09
15-150  4.985e-07   2.571e-07

Peak spectrum fit

Power-law model
Time interval is from    0.032 sec. to    1.032 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 3.49712     ( -0.233156   0.251692 )
Norm@50keV  : 6.35450E-03    ( -0.00128083   0.00135839 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          78.93 using 59 PHA bins.
# Reduced chi-squared =          1.385 for     57 degrees of freedom 
# Null hypothesis probability =   2.882267e-02
 
Photon flux (15-150 keV)    in 1 sec: 2.56401 ( -0.238022  0.238106 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.98143e-08 ( -9.94076e-09  1.00753e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.032 sec. to    1.032 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.00000     (     )
Epeak [keV] : 50.0000      (   )
Norm@50keV  : 3.07935E-02    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         230.12 using 59 PHA bins.
# Reduced chi-squared =         4.1093 for     56 degrees of freedom 
# Null hypothesis probability =   5.655036e-23
 
Photon flux (15-150 keV)    in 1 sec: 2.44524 ( -0.2441  0.24338 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.9958e-08 ( -8.8083e-09  8.9976e-09 ) ergs/cm2
 
Band function
Time interval is from    0.032 sec. to    1.032 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 0.632979   ( -2.16709   2.06924 )
beta        : -8.12204    ( 9.80009   19.7789 )
Epeak [keV] : 17.7092      ( -6.85773 1.74774 )
Norm@50keV   : 5.77575    ( -3.35913   164.686 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.95 using 59 PHA bins.
# Reduced chi-squared =          1.126 for     55 degrees of freedom 
# Null hypothesis probability =   2.420250e-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]    : 5.05009  (-0.40583  0.429495)
R^2/D10^2   : 20.4230  (-6.86463   10.8)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.82 using 59 PHA bins.
# Reduced chi-squared =          1.102 for     57 degrees of freedom 
# Null hypothesis probability =   2.776614e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.168e-08   6.960e-09
25- 50  3.459e-08   5.445e-09
50-150  1.476e-09   6.790e-10
15-150  8.775e-08   1.016e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 13.3328       (-1.85316      2.29141)
Norm        : 52.8568       (-11.1898     16.8492)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.97 using 59 PHA bins.
# Reduced chi-squared =          1.140 for     57 degrees of freedom 
# Null hypothesis probability =   2.189305e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.504e-08   7.760e-09
25- 50  3.347e-08   5.125e-09
50-150  4.638e-09   1.863e-09
15-150  9.315e-08   1.083e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 2.09075        (-1.85537      191.537)
R1^2/D10^2  : 593.318        (-1721.36      -1721.36)
kT2 [keV]   : 5.43177        (-0.561741      -5.36647)
R2^2/D10^2  : 13.0981    (-14.2147   11.7011)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.77 using 59 PHA bins.
# Reduced chi-squared =          1.105 for     55 degrees of freedom 
# Null hypothesis probability =   2.758140e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.187e-08   2.663e-08
25- 50  3.522e-08   1.974e-08
50-150  2.090e-09   1.424e-09
15-150  8.918e-08   4.590e-08
Plot creation:
Tue Feb 18 05:39:25 EST 2014