batgrbproduct analysis for trigger=154630

batgrbproduct Analysis for Trigger=154630

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 20:20:30 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger154630
======================================================================

  Trigger: 00154630      Segment: 000

  BAT Trigger Time: 148147173.568   [s; MET]
      Trigger Stop: 148147174.08   [s; MET]
               UTC: 2005-09-11T15:59:33.844660    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 13.6918901114025   Dec: -38.8605504101289  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.81
     Image Trigger?:     NO
     Rate S/N Ratio:     18.8414436814168  [ if not an image trigger ]
     Image S/N Ratio:    8.81

  Flight Position:   [ source = BAT ]
    RA: 13.6918901114025   Dec: -38.8605504101289  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 13.714430047257   Dec: -38.860997938466  [deg; J2000]  
        { 00h 54m 51.5s , -38d 51' 39.6" }
         +/- 2.362665357153 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.13727142198295 [arcmin] (formal 1-sigma fit error)
    SNR: 8.90608111901844
 
  Angular difference between Flight and Ground position is 1.053416 arcmin
 
  Partial Coding Fraction: 0.4296875    [ including projection effects ]

  Duration
     T90: 16.2399999797344 +/- 0.879317904925426
        Measured from: -0.751999974250793
                   to: 15.4880000054836     [s; relative to TRIGTIME]
     T50: 13.5280000269413 +/- 1.31090807331145
        Measured from: 0.19200000166893
                   to: 13.7200000286102     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.104000002145767     
                   to: 0.895999997854233     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.995999991893768     
                   to: 15.9680000245571     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.197509   0.222558   0.128693   0.008347
           0.028476   0.029615   0.025997   0.023139 [error]
 Peak      0.059070   0.053135   0.043180   0.010248
           0.008055   0.008053   0.007219   0.005863 [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 5.98e-08 9.07e-08 1.03e-07 2.23e-07 3.20e-07 4.76e-07   erg/cm2
              Error 1.29e-08 1.34e-08 2.52e-08 1.11e-07 5.83e-08 1.37e-07   erg/cm2
Peak flux Power-law 5.37e-01 4.47e-01 2.52e-01 2.11e-01 1.33e+00 1.45e+00   ph/cm2/s
              Error 1.22e-01 6.59e-02 6.07e-02 1.00e-01 1.97e-01 2.18e-01   ph/cm2/s
 
Fluence   Cutoff-PL 5.97e-08 9.12e-08 1.03e-07 2.03e-07 3.18e-07 4.57e-07   erg/cm2
              Error 1.34e-08 1.60e-08 2.61e-08 1.61e-07 6.41e-08 1.78e-07   erg/cm2
Peak flux Cutoff-PL 5.44e-01 4.47e-01 2.49e-01 2.03e-01 1.33e+00 1.45e+00   ph/cm2/s
              Error 1.23e-01 6.59e-02 6.09e-02 1.62e-01 1.96e-01 2.18e-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    1.816    0.277    -      -           2.05e-03 3.66e-04   47.770 57
CPL   1.786    1.054     291.3    0.0      2.14e-03 0.00e+00   47.770 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.824    0.289    -      -           9.56e-03 1.72e-03   55.550 57
CPL   2.152    0.577      61.5    0.0      6.52e-03 0.00e+00   55.600 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   16.964   -0.996   15.968
T90    16.240   -0.752   15.488
T50    13.528    0.192   13.720
Peak    1.000   -0.104    0.896

Click here for the BAT GCN circular template

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
   13.7144   -38.8610   0.0216    28.2734    74.5155         0.5021197      8.906 TRIG_00154630                 
 
Foreground time interval of the image:
 -0.996  15.968 (delta_t =  16.964 [sec])
Background time interval of the image:
-299.568  -0.996 (delta_t = 298.572 [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 0.512000

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 0.512000

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 0.512000

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   -0.996 sec. to   15.968 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.81614     ( -0.268992   0.284863 )
Norm@50keV  : 2.05135E-03    ( -0.000372144   0.000359976 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.77 using 59 PHA bins.
# Reduced chi-squared =         0.8381 for     57 degrees of freedom 
# Null hypothesis probability =   8.031180e-01
 
Photon flux (15-150 keV)    in 16.96 sec: 0.284460 ( -0.041949  0.041955 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.20122e-07 ( -5.7498e-08  5.92007e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.996 sec. to   15.968 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.78607     ( -1.13668   0.970581 )
Epeak [keV] : 291.346      (   )
Norm@50keV  : 2.13547E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.77 using 59 PHA bins.
# Reduced chi-squared =         0.8530 for     56 degrees of freedom 
# Null hypothesis probability =   7.751015e-01
 
Photon flux (15-150 keV)    in 16.96 sec: 0.283969 ( -0.042802  0.042296 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.18324e-07 ( -6.76433e-08  6.04929e-08 ) ergs/cm2

Band function

Time interval is from   -0.996 sec. to   15.968 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.95457   ( -4.95457   -4.95457 )
beta        : -1.93214    ( -0.368137   0.31341 )
Epeak [keV] : 22.2035      ( -22.2035 5.89358 )
Norm@50keV   : 576.781    ( -84.6056   2.12021e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.76 using 59 PHA bins.
# Reduced chi-squared =         0.8501 for     55 degrees of freedom 
# Null hypothesis probability =   7.777556e-01
 
Photon flux (15-150 keV)    in 16.96 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]    : 9.61403  (-1.67883  2.22947)
R^2/D10^2   : 0.152830  (-0.0830406   0.164682)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.77 using 59 PHA bins.
# Reduced chi-squared =          1.049 for     57 degrees of freedom 
# Null hypothesis probability =   3.752726e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.808e-08   1.288e-08
25- 50  1.130e-07   2.460e-08
50-150  5.254e-08   2.212e-08
15-150  2.136e-07   4.614e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 93.4879       (-39.9376      -93.4935)
Norm        : 1.27642       (-0.247574     0.343527)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.36 using 59 PHA bins.
# Reduced chi-squared =         0.8485 for     57 degrees of freedom 
# Null hypothesis probability =   7.853341e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.654e-08   1.212e-08
25- 50  9.641e-08   1.945e-08
50-150  1.502e-07   8.889e-08
15-150  3.032e-07   1.048e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.59137        (-1.84418      2.05493)
R1^2/D10^2  : 0.500996        (-0.267969      0.858683)
kT2 [keV]   : 29.3349        (-14.5884      158.417)
R2^2/D10^2  : 1.72281E-03    (-0.00123842   0.00814707)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          45.86 using 59 PHA bins.
# Reduced chi-squared =         0.8339 for     55 degrees of freedom 
# Null hypothesis probability =   8.051098e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.946e-08   3.437e-08
25- 50  9.179e-08   4.974e-08
50-150  1.583e-07   1.042e-07
15-150  3.096e-07   1.732e-07

Peak spectrum fit

Power-law model

Time interval is from   -0.104 sec. to    0.896 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.82404     ( -0.280248   0.297508 )
Norm@50keV  : 9.55824E-03    ( -0.00175029   0.00168187 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.55 using 59 PHA bins.
# Reduced chi-squared =         0.9746 for     57 degrees of freedom 
# Null hypothesis probability =   5.295331e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.32958 ( -0.196534  0.196611 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.79291e-08 ( -1.58584e-08  1.63072e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.104 sec. to    0.896 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.15157     ( -1.08305   0.070025 )
Epeak [keV] : 61.5203      (   )
Norm@50keV  : 6.52059E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.60 using 59 PHA bins.
# Reduced chi-squared =         0.9929 for     56 degrees of freedom 
# Null hypothesis probability =   4.899516e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.33007 ( -0.19643  0.19599 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.72651e-08 ( -1.55161e-08  1.66269e-08 ) ergs/cm2

Band function

Time interval is from   -0.104 sec. to    0.896 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.33105   ( 1.32259   1.32259 )
beta        : -1.84679    ( 1.84779   0.299987 )
Epeak [keV] : 34.1940      ( -33.6744 -33.6744 )
Norm@50keV   : 2.22998E-02    ( -0.0234379   2.30159e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.48 using 59 PHA bins.
# Reduced chi-squared =          1.009 for     55 degrees of freedom 
# Null hypothesis probability =   4.566782e-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]    : 10.1497  (-2.31179  3.1809)
R^2/D10^2   : 0.563262  (-0.556757   0.93506)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          74.31 using 59 PHA bins.
# Reduced chi-squared =          1.304 for     57 degrees of freedom 
# Null hypothesis probability =   6.154080e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.188e-08   3.288e-09
25- 50  3.015e-08   7.225e-09
50-150  1.642e-08   6.683e-09
15-150  5.845e-08   1.407e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 99.7783       (-44.3511      -99.7848)
Norm        : 5.82859       (-1.03646     1.60729)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.26 using 59 PHA bins.
# Reduced chi-squared =          1.005 for     57 degrees of freedom 
# Null hypothesis probability =   4.653613e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.523e-08   3.115e-09
25- 50  2.633e-08   5.025e-09
50-150  4.262e-08   2.454e-08
15-150  8.418e-08   2.836e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.50394        (-1.4231      1.842)
R1^2/D10^2  : 4.59074        (-3.04979      10.6026)
kT2 [keV]   : 25.9221        (-8.83837      30.2408)
R2^2/D10^2  : 1.48998E-02    (-0.0133032   0.0504545)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.04 using 59 PHA bins.
# Reduced chi-squared =         0.9826 for     55 degrees of freedom 
# Null hypothesis probability =   5.112055e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.785e-08   9.789e-09
25- 50  2.312e-08   1.269e-08
50-150  4.964e-08   2.937e-08
15-150  9.061e-08   4.796e-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: 1.81614     ( -0.268992   0.284863 )
Norm@50keV  : 2.05135E-03    ( -0.000372144   0.000359976 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.77 using 59 PHA bins.
# Reduced chi-squared =         0.8381 for     57 degrees of freedom 
# Null hypothesis probability =   8.031180e-01
 
Photon flux (15-150 keV)    in 16.96 sec: 0.284460 ( -0.041949  0.041955 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.20122e-07 ( -5.7498e-08  5.92007e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.78607     ( -1.13668   0.970581 )
Epeak [keV] : 291.346      (   )
Norm@50keV  : 2.13547E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.77 using 59 PHA bins.
# Reduced chi-squared =         0.8530 for     56 degrees of freedom 
# Null hypothesis probability =   7.751015e-01
 
Photon flux (15-150 keV)    in 16.96 sec: 0.283969 ( -0.042802  0.042296 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.18324e-07 ( -6.76433e-08  6.04929e-08 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.95457   ( -4.95457   -4.95457 )
beta        : -1.93214    ( -0.368137   0.31341 )
Epeak [keV] : 22.2035      ( -22.2035 5.89358 )
Norm@50keV   : 576.781    ( -84.6056   2.12021e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.76 using 59 PHA bins.
# Reduced chi-squared =         0.8501 for     55 degrees of freedom 
# Null hypothesis probability =   7.777556e-01
 
Photon flux (15-150 keV)    in 16.96 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)  = 9.07e-08
S(50-100 keV) = 1.03e-07

T90 vs. Hardness ratio plot

T90                                   = 16.2399999797344 sec.
Hardness ratio (energy fluence ratio) = 1.13561

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.12682
Count Ratio (50-100 keV) / (15-25 keV) = 0.65158

Mask shadow pattern

IMX = 1.435927784720583E-01, IMY = -5.183233407212076E-01

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.512000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.512000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.512000

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:
-299.568000 -0.996000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 21.4235 -19.9665    2.6  35.7  110.3   1.7990   4.5 ------	UNKNOWN                       
 63.7768  -4.1497    2.7  43.3 -178.2   1.2638   4.3 ------	UNKNOWN                       
205.1200 -82.5609    2.4  50.7  -20.9   1.8943   4.9 ------	UNKNOWN                       
109.7701 -51.5030    3.8  37.9  -76.5   1.4753   3.1 ------	UNKNOWN

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

Time interval of the image:
-0.996000 15.968000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 13.7144 -38.8610    1.3  28.3   74.5   0.5021   8.9 ------	UNKNOWN                       
 64.3792 -17.9195    3.1  30.2 -171.1   0.1542   3.8 ------	UNKNOWN                       
 81.2058  -2.8818    2.2  50.5 -156.3   0.4581   5.1 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:

Plot creation:
Sun May 31 15:41:22 EDT 2015