batgrbproduct analysis for trigger=159913

batgrbproduct Analysis for Trigger=159913

Analysis Summary

Notes:

1) No attempt has been made to eliminate the non-significant decimal places.
2) This batgrbproduct analysis is done using the HEASARC data.
3) This batgrbproduct analysis is using the flight position for the mask-weighting calculation.

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Wed Jan 22 19:52:22 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger159913
======================================================================

  Trigger: 00159913      Segment: 000

  BAT Trigger Time: 151133011.136   [s; MET]
      Trigger Stop: 151133015.232   [s; MET]
               UTC: 2005-10-16T05:23:31.350440    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 122.811371428469   Dec: -18.311210933463  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9.72
     Image Trigger?:     NO
     Rate S/N Ratio:     12.4498995979887  [ if not an image trigger ]
     Image S/N Ratio:    9.72

  Flight Position:   [ source = BAT ]
    RA: 122.811371428469   Dec: -18.311210933463  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 122.810984377459   Dec: -18.3000451512477  [deg; J2000]  
        { 08h 11m 14.6s , -18d 18' 00.2" }
         +/- 1.93701677274414 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.849059302469891 [arcmin] (formal 1-sigma fit error)
    SNR: 11.8284499138523
 
  Angular difference between Flight and Ground position is 0.670310 arcmin
 
  Partial Coding Fraction: 0.1777344    [ including projection effects ]

  Duration
     T90: 21 +/- 6.08276253029822
        Measured from: -0.136000007390976
                   to: 20.863999992609     [s; relative to TRIGTIME]
     T50: 7 +/- 5.09901951359278
        Measured from: 1.86399999260902
                   to: 8.86399999260902     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 4.86399999260902     
                   to: 5.86399999260902     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.136000007390976     
                   to: 22.863999992609     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.356641   0.492525   0.347141   0.085864
           0.061624   0.065061   0.056287   0.047652 [error]
 Peak      0.039038   0.055653   0.038189   0.017926
           0.013206   0.013476   0.012262   0.010575 [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 1.46e-07 2.31e-07 2.77e-07 6.45e-07 8.40e-07 1.30e-06   erg/cm2
              Error 3.35e-08 3.36e-08 5.48e-08 2.66e-07 1.31e-07 3.14e-07   erg/cm2
Peak flux Power-law 4.41e-01 4.34e-01 2.99e-01 3.25e-01 1.30e+00 1.50e+00   ph/cm2/s
              Error 2.21e-01 1.32e-01 1.00e-01 2.37e-01 3.70e-01 4.01e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.40e-07 2.39e-07 2.82e-07 4.29e-07 8.27e-07 1.09e-06   erg/cm2
              Error 3.86e-08 4.19e-08 5.92e-08 4.77e-07 1.41e-07 4.36e-07   erg/cm2
Peak flux Cutoff-PL 4.60e-01 4.40e-01 2.93e-01 3.04e-01 1.32e+00 1.50e+00   ph/cm2/s
              Error 2.22e-01 1.33e-01 7.70e-02 3.18e-01 3.70e-01 3.99e-01   ph/cm2/s
 
Fluence        Band -------- -------- -------- -------- -------- --------   erg/cm2
              Error -------- -------- -------- -------- -------- --------   erg/cm2
Peak flux      Band -------- -------- -------- -------- -------- --------   ph/cm2/s
              Error -------- -------- -------- -------- -------- --------   ph/cm2/s

 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.741    0.249    -      -           3.96e-03 5.97e-04   61.250 57
CPL   1.470    0.928      95.6    0.0      5.48e-03 0.00e+00   61.030 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.537    0.513    -      -           1.03e-02 2.80e-03   53.740 57
CPL   1.552    0.518    9999.4    0.0      1.04e-02 1.63e-02   53.740 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: 5.440000 sec.
T50 in the 50-300 keV band: 3.136000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   23.000   -0.136   22.864
T90    21.000   -0.136   20.864
T50     7.000    1.864    8.864
Peak    1.000    4.864    5.864

Click here for the BAT GCN circular template

Special notes of this burst

Image

Pre-slew 15.0-350.0 keV image (Event data)

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  122.8110   -18.3000   0.0163    49.2965     9.1424         1.3786934     11.828 TRIG_00159913                 
 
Foreground time interval of the image:
 -0.136  22.864 (delta_t =  23.000 [sec])
Background time interval of the image:
-299.136  -0.136 (delta_t = 299.000 [sec])

Lightcurves

Notes:

1) The mask-weighted light curves are using the flight position.
2) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
3) For all the mask-weighted lightcurves, the y-axis units are counts/sec/det where a det is 0.4 x 0.4 = 0.16 sq cm.
4) The verticle lines correspond to following: green dotted lines are T50 interval, black dotted lines are T90 interval, blue solid line(s) is a spacecraft slew start time, and orange solid line(s) is a spacecraft slew end time.
5) Time of each bin is in the middle of the bin.

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

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000

8 ms binning

From T100_start-3 s to T100_start+3 s

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000

2 ms binning

From T100_start-1 s to T100_start+1 s

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000

SN=5 or 10 sec. binning (whichever binning is satisfied first)

SN=5 or 10 sec. binning (T < 200 sec)

Quad-rate summed light curves (from T0-300s to T0+1000s)

Spectral Evolution

Spectra

Notes:

1) The fitting includes the systematic errors.
2) When the burst includes telescope slew time periods, the fitting uses an average response file made from multiple 5-s response files through out the slew time plus single time preiod for the non-slew times, and weighted by the total counts in the corresponding time period using addrmf. An average response file is needed becuase a spectral fit using the pre-slew DRM will introduce some errors in both a spectral shape and a normalization if the PHA file contains a lot of the slew/post-slew time interval.
3) For fits to more complicated models (e.g. a power-law over a cutoff power-law), the BAT team has decided to require a chi-square improvement of more than 6 for each extra dof.

Time averaged spectrum fit using the average DRM

Power-law model

Time interval is from   -0.136 sec. to   22.864 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.74139     ( -0.244267   0.253292 )
Norm@50keV  : 3.95786E-03    ( -0.000601214   0.000592003 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.25 using 59 PHA bins.
# Reduced chi-squared =          1.075 for     57 degrees of freedom 
# Null hypothesis probability =   3.259861e-01
 
Photon flux (15-150 keV)    in 23 sec: 0.533479 ( -0.0782926  0.0785101 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.40404e-07 ( -1.30605e-07  1.31764e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.136 sec. to   22.864 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.47048     ( -1.15599   0.699778 )
Epeak [keV] : 95.5582      (   )
Norm@50keV  : 5.47603E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.03 using 59 PHA bins.
# Reduced chi-squared =          1.090 for     56 degrees of freedom 
# Null hypothesis probability =   2.998826e-01
 
Photon flux (15-150 keV)    in 23 sec: 0.528085 ( -0.080938  0.080697 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.27064e-07 ( -1.41441e-07  1.3975e-07 ) ergs/cm2

Band function

Time interval is from   -0.136 sec. to   22.864 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.97725   ( -4.97725   -4.97725 )
beta        : -1.77858    ( -0.281155   0.258425 )
Epeak [keV] : 20.4406      ( -20.4406 8.29237 )
Norm@50keV   : 1789.25    ( -253.148   3.72504e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.89 using 59 PHA bins.
# Reduced chi-squared =          1.107 for     55 degrees of freedom 
# Null hypothesis probability =   2.722782e-01
 
Photon flux (15-150 keV)    in 23 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]    : 13.2875  (-2.20744  2.62597)
R^2/D10^2   : 8.92950E-02  (-0.043419   0.084986)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          73.29 using 59 PHA bins.
# Reduced chi-squared =          1.286 for     57 degrees of freedom 
# Null hypothesis probability =   7.188359e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.686e-08   1.932e-08
25- 50  2.710e-07   6.133e-08
50-150  3.063e-07   9.046e-08
15-150  6.541e-07   1.266e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 99.9928       (-38.5652      -109.363)
Norm        : 2.38279       (-0.470608     0.459966)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.48 using 59 PHA bins.
# Reduced chi-squared =          1.079 for     57 degrees of freedom 
# Null hypothesis probability =   3.186647e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.432e-07   2.861e-08
25- 50  2.477e-07   4.170e-08
50-150  4.014e-07   1.959e-07
15-150  7.923e-07   2.268e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.94109        (-2.68893      4.33558)
R1^2/D10^2  : 1.07625        (-0.868654      12.6106)
kT2 [keV]   : 21.2590        (-6.29881      57.0479)
R2^2/D10^2  : 1.23115E-02    (-0.0120545   0.0179066)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.79 using 59 PHA bins.
# Reduced chi-squared =          1.123 for     55 degrees of freedom 
# Null hypothesis probability =   2.465504e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.385e-07   7.888e-08
25- 50  2.363e-07   1.176e-07
50-150  4.298e-07   2.449e-07
15-150  8.045e-07   4.252e-07

Peak spectrum fit

Power-law model

Time interval is from    4.864 sec. to    5.864 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.53702     ( -0.515542   0.509492 )
Norm@50keV  : 1.03460E-02    ( -0.00281931   0.00278498 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.74 using 59 PHA bins.
# Reduced chi-squared =         0.9427 for     57 degrees of freedom 
# Null hypothesis probability =   5.983070e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.30487 ( -0.368854  0.370756 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.75822e-08 ( -2.81251e-08  2.84497e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    4.864 sec. to    5.864 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.55223     ( -0.534918   0.501922 )
Epeak [keV] : 9999.35      ( -9999.36 -9999.36 )
Norm@50keV  : 1.03533E-02    ( -0.00275985   0.0297401 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.74 using 59 PHA bins.
# Reduced chi-squared =         0.9597 for     56 degrees of freedom 
# Null hypothesis probability =   5.607727e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.31545 ( -0.379692  0.36069 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.74431e-08 ( -2.79289e-08  2.78399e-08 ) ergs/cm2

Band function

Time interval is from    4.864 sec. to    5.864 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.88941   ( -4.88941   -4.88941 )
beta        : -1.67407    ( -0.809921   0.589672 )
Epeak [keV] : 26.2771      ( -26.2771 11.4424 )
Norm@50keV   : 707.571    ( -187.468   9.67883e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.28 using 59 PHA bins.
# Reduced chi-squared =         0.9687 for     55 degrees of freedom 
# Null hypothesis probability =   5.407574e-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]    : 14.0533  (  )
R^2/D10^2   : 0.172822  (-0.173925   1.51754)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.60 using 59 PHA bins.
# Reduced chi-squared =          1.081 for     57 degrees of freedom 
# Null hypothesis probability =   3.150032e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.994e-09   5.225e-09
25- 50  2.795e-08   1.723e-08
50-150  3.097e-08   2.105e-08
15-150  6.691e-08   4.172e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.360       (-199.362      -199.362)
Norm        : 5.30308       (-1.4237     1.86839)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.31 using 59 PHA bins.
# Reduced chi-squared =         0.9527 for     57 degrees of freedom 
# Null hypothesis probability =   5.767690e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.320e-08   7.770e-09
25- 50  2.540e-08   1.536e-08
50-150  5.571e-08   3.283e-08
15-150  9.432e-08   5.695e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.21178        (-2.57      4.52487)
R1^2/D10^2  : 1.70958        (-1.37532      7.86328)
kT2 [keV]   : 60.0200        (-38.7879      -61.5659)
R2^2/D10^2  : 1.57424E-03    (-0.00142497   0.0250174)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.46 using 59 PHA bins.
# Reduced chi-squared =         0.9355 for     55 degrees of freedom 
# Null hypothesis probability =   6.108626e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.525e-08   9.680e-09
25- 50  2.536e-08   1.472e-08
50-150  6.163e-08   3.566e-08
15-150  1.022e-07   5.455e-08

Pre-slew spectrum (Pre-slew PHA with pre-slew DRM)

Power-law model

 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.74139     ( -0.244267   0.253292 )
Norm@50keV  : 3.95786E-03    ( -0.000601214   0.000592003 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.25 using 59 PHA bins.
# Reduced chi-squared =          1.075 for     57 degrees of freedom 
# Null hypothesis probability =   3.259861e-01
 
Photon flux (15-150 keV)    in 23 sec: 0.533479 ( -0.0782926  0.0785101 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.40404e-07 ( -1.30605e-07  1.31764e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.47048     ( -1.15599   0.699778 )
Epeak [keV] : 95.5582      ( -95.5265 -95.5689 )
Norm@50keV  : 5.47603E-03    ( -0.00547564   0.0158481 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.03 using 59 PHA bins.
# Reduced chi-squared =          1.090 for     56 degrees of freedom 
# Null hypothesis probability =   2.998826e-01
 
Photon flux (15-150 keV)    in 23 sec: 0.528085 ( -0.080938  0.080697 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.27064e-07 ( -1.41441e-07  1.3975e-07 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.97725   ( -4.97725   -4.97725 )
beta        : -1.77858    ( -0.281155   0.258425 )
Epeak [keV] : 20.4406      ( -20.4406 8.29237 )
Norm@50keV   : 1789.25    ( -253.148   3.72504e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.89 using 59 PHA bins.
# Reduced chi-squared =          1.107 for     55 degrees of freedom 
# Null hypothesis probability =   2.722782e-01
 
Photon flux (15-150 keV)    in 23 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

S(25-50 keV) vs. S(50-100 keV) plot

S(25-50 keV)  = 2.31e-07
S(50-100 keV) = 2.77e-07

T90 vs. Hardness ratio plot

T90                                   = 21 sec.
Hardness ratio (energy fluence ratio) = 1.19913

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.38101
Count Ratio (50-100 keV) / (15-25 keV) = 0.973363

Mask shadow pattern

IMX = 1.147696424446239E+00, IMY = -1.847015406516966E-01

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000

Spacecraft aspect plot

Bright source in the pre-burst/pre-slew/post-slew images

Pre-burst image of 15-350 keV band

Time interval of the image:
-299.136000 -0.136000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
102.0885  23.9264    2.4  34.6   79.1   1.8934   4.8 ------	UNKNOWN                       
203.4970  73.7761    3.2  55.8 -175.6   2.6041   3.7 ------	UNKNOWN                       
213.4538  72.3449    2.6  58.3 -173.2   4.8480   4.3 ------	UNKNOWN

Pre-slew background subtracted image of 15-350 keV band

Time interval of the image:
-0.136000 22.864000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
122.8110 -18.3000    1.0  49.3    9.1   1.3787  11.8 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
101.364620 302.882300
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.5612 -40.5966    1.6  24.8  -28.6   1.0322   7.3    2.9	Vela X-1                      
170.3267 -60.5528   71.2  53.9  -31.7   0.1093   0.2    4.2	Cen X-3                       
 83.3213 -50.1723    2.4  44.7   30.4   1.7771   4.9 ------	UNKNOWN                       
129.3115  32.8308    3.0  51.5 -178.0   1.3981   3.9 ------	UNKNOWN

Plot creation:
Sun May 31 15:22:52 EDT 2015