batgrbproduct analysis for trigger=338633

batgrbproduct Analysis for Trigger=338633

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): Sun Jan 19 19:28:26 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger338633
======================================================================

  Trigger: 00338633      Segment: 000

  BAT Trigger Time: 252362176   [s; MET]
      Trigger Stop: 252362240   [s; MET]
               UTC: 2008-12-30T20:36:12.623340    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 37.3152367645834   Dec: -25.1417564760223  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    16.75
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    16.75

  Flight Position:   [ source = BAT ]
    RA: 37.3152367645834   Dec: -25.1417564760223  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 37.3288399927385   Dec: -25.1448324239261  [deg; J2000]  
        { 02h 29m 18.9s , -25d 08' 41.4" }
         +/- 1.41449278620275 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.746061551724216 [arcmin] (formal 1-sigma fit error)
    SNR: 18.5342266712082
 
  Angular difference between Flight and Ground position is 0.761559 arcmin
 
  Partial Coding Fraction: 1    [ including projection effects ]

  Duration
     T90: 60.6920000314713 +/- 13.4261312506135
        Measured from: -0.904000014066696
                   to: 59.7880000174046     [s; relative to TRIGTIME]
     T50: 21.4160000085831 +/- 3.70535829583426
        Measured from: 31.1319999992847
                   to: 52.5480000078678     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 46.6279999911785     
                   to: 47.6279999911785     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -14.4320000112057     
                   to: 62.4280000030994     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.570028   0.637352   0.330430   0.042289
           0.041498   0.043259   0.037976   0.033052 [error]
 Peak      0.026244   0.032503   0.026378   0.006827
           0.004949   0.005239   0.004540   0.003777 [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 1.76e-07 2.52e-07 2.67e-07 5.25e-07 8.58e-07 1.22e-06   erg/cm2
              Error 2.11e-08 2.01e-08 3.67e-08 1.46e-07 8.33e-08 1.83e-07   erg/cm2
Peak flux Power-law 2.22e-01 2.33e-01 1.73e-01 2.07e-01 7.07e-01 8.34e-01   ph/cm2/s
              Error 6.30e-02 4.14e-02 3.71e-02 9.11e-02 1.19e-01 1.45e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.68e-07 2.64e-07 2.64e-07 2.53e-07 8.21e-07 9.50e-07   erg/cm2
              Error 2.39e-08 2.65e-08 3.98e-08 2.46e-07 9.70e-08 2.77e-07   erg/cm2
Peak flux Cutoff-PL 2.17e-01 2.37e-01 1.75e-01 1.66e-01 7.03e-01 7.95e-01   ph/cm2/s
              Error 7.08e-02 4.91e-02 4.01e-02 1.53e-01 1.22e-01 1.81e-01   ph/cm2/s
 
Fluence        Band 1.66e-07 2.64e-07 2.59e-07 2.98e-07 8.25e-07 1.06e-06   erg/cm2
              Error 2.44e-08 -------- -------- -------- -------- --------   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    1.914    0.156    -      -           1.21e-03 1.20e-04   43.100 57
CPL   1.487    0.639      52.2   -2.3      2.11e-03 2.04e-03   41.590 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.431    0.289    -      -           5.76e-03 9.91e-04   56.840 57
CPL   1.265    0.000     213.9    0.0      7.05e-03 0.00e+00   56.770 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: 30.208000 sec.
T50 in the 50-300 keV band: 14.912000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   76.860  -14.432   62.428
T90    60.692   -0.904   59.788
T50    21.416   31.132   52.548
Peak    1.000   46.628   47.628

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
   37.3288   -25.1448   0.0103    18.4624   -14.1208         1.6045877     18.534 TRIG_00338633                 
 
Foreground time interval of the image:
-14.432  62.428 (delta_t =  76.860 [sec])
Background time interval of the image:
-263.899 -14.432 (delta_t = 249.467 [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

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)

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  -14.432 sec. to   62.428 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.91432     ( -0.152891   0.159018 )
Norm@50keV  : 1.21458E-03    ( -0.000120747   0.000118532 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.10 using 59 PHA bins.
# Reduced chi-squared =         0.7562 for     57 degrees of freedom 
# Null hypothesis probability =   9.133322e-01
 
Photon flux (15-150 keV)    in 76.86 sec: 0.175374 ( -0.0140814  0.0140875 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.58411e-07 ( -8.25961e-08  8.40549e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from  -14.432 sec. to   62.428 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.48688     ( -0.689562   0.588988 )
Epeak [keV] : 52.1641      ( -47.5681 -52.1641 )
Norm@50keV  : 2.10617E-03    ( -0.00109238   0.00299553 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          41.59 using 59 PHA bins.
# Reduced chi-squared =         0.7427 for     56 degrees of freedom 
# Null hypothesis probability =   9.243762e-01
 
Photon flux (15-150 keV)    in 76.86 sec: 0.171744 ( -0.014916  0.014903 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.20788e-07 ( -9.57291e-08  9.82348e-08 ) ergs/cm2

Band function

Time interval is from  -14.432 sec. to   62.428 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.48665   ( 1.58667   0.637846 )
beta        : -10.0000    ( 10   3.55271e-15 )
Epeak [keV] : 52.1356      ( -29.1887 -52.1356 )
Norm@50keV   : 2.10666E-03    ( -0.00101142   0.00299017 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          41.59 using 59 PHA bins.
# Reduced chi-squared =         0.7562 for     55 degrees of freedom 
# Null hypothesis probability =   9.090881e-01
 
Photon flux (15-150 keV)    in 76.86 sec: 0.171350 ( 6.82865  -0.01366 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.245e-07 ( 0  0 ) ergs/cm2

Single BB

 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 10.5344  (-0.998376  1.12291)
R^2/D10^2   : 6.60982E-02  (-0.0210116   0.0303727)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          71.12 using 59 PHA bins.
# Reduced chi-squared =          1.248 for     57 degrees of freedom 
# Null hypothesis probability =   9.880182e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.166e-07   1.710e-08
25- 50  3.116e-07   2.682e-08
50-150  1.887e-07   3.758e-08
15-150  6.169e-07   6.076e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 78.7484       (-19.1896      30.3231)
Norm        : 0.822225       (-0.0991588     0.118278)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          41.83 using 59 PHA bins.
# Reduced chi-squared =         0.7339 for     57 degrees of freedom 
# Null hypothesis probability =   9.340881e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.638e-07   1.910e-08
25- 50  2.686e-07   2.340e-08
50-150  3.752e-07   8.566e-08
15-150  8.076e-07   1.062e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.94272        (-2.16774      1.92065)
R1^2/D10^2  : 0.383976        (-0.229005      1.81226)
kT2 [keV]   : 19.6270        (-5.64944      11.1968)
R2^2/D10^2  : 4.56540E-03    (-0.0037081   0.00535737)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          44.08 using 59 PHA bins.
# Reduced chi-squared =         0.8015 for     55 degrees of freedom 
# Null hypothesis probability =   8.541647e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.628e-07   6.900e-08
25- 50  2.625e-07   8.439e-08
50-150  3.794e-07   2.037e-07
15-150  8.047e-07   3.186e-07

Peak spectrum fit

Power-law model

Time interval is from   46.628 sec. to   47.628 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.43109     ( -0.288864   0.290112 )
Norm@50keV  : 5.76227E-03    ( -0.00099621   0.000986198 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.84 using 59 PHA bins.
# Reduced chi-squared =         0.9972 for     57 degrees of freedom 
# Null hypothesis probability =   4.810769e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.706860 ( -0.119136  0.119229 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.53369e-08 ( -1.05536e-08  1.07419e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   46.628 sec. to   47.628 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.26525     (     )
Epeak [keV] : 213.932      (   )
Norm@50keV  : 7.04955E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.77 using 59 PHA bins.
# Reduced chi-squared =          1.014 for     56 degrees of freedom 
# Null hypothesis probability =   4.460756e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.702895 ( -0.122113  0.121531 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.45651e-08 ( -1.18763e-08  1.13931e-08 ) ergs/cm2

Band function

Time interval is from   46.628 sec. to   47.628 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.96436   ( -4.96436   -4.96436 )
beta        : -1.54520    ( -0.432045   0.331187 )
Epeak [keV] : 25.0862      ( -25.0862 8.21554 )
Norm@50keV   : 547.847    ( -90.7182   2.88396e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.71 using 59 PHA bins.
# Reduced chi-squared =          1.013 for     55 degrees of freedom 
# Null hypothesis probability =   4.477866e-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]    : 14.9517  (-3.01028  3.92353)
R^2/D10^2   : 8.21993E-02  (-0.045409   0.0975795)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.54 using 59 PHA bins.
# Reduced chi-squared =          1.150 for     57 degrees of freedom 
# Null hypothesis probability =   2.047507e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.849e-09   1.384e-09
25- 50  1.525e-08   4.630e-09
50-150  2.317e-08   8.315e-09
15-150  4.227e-08   1.211e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (-89.45      -199.363)
Norm        : 2.90577       (-0.484809     0.484809)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.19 using 59 PHA bins.
# Reduced chi-squared =          1.003 for     57 degrees of freedom 
# Null hypothesis probability =   4.680412e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.236e-09   4.199e-09
25- 50  1.392e-08   7.815e-09
50-150  3.053e-08   1.723e-08
15-150  5.168e-08   2.890e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.46738        (-2.61162      5.62967)
R1^2/D10^2  : 0.951794        (-0.801081      5.41855)
kT2 [keV]   : 25.8149        (-9.08511      -25.8805)
R2^2/D10^2  : 1.00614E-02    (-0.00990527   0.0380211)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.52 using 59 PHA bins.
# Reduced chi-squared =          1.028 for     55 degrees of freedom 
# Null hypothesis probability =   4.179752e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.991e-09   3.991e-09
25- 50  1.343e-08   7.370e-09
50-150  3.329e-08   1.923e-08
15-150  5.371e-08   2.774e-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: 1.91432     ( -0.152891   0.159018 )
Norm@50keV  : 1.21458E-03    ( -0.000120747   0.000118532 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.10 using 59 PHA bins.
# Reduced chi-squared =         0.7562 for     57 degrees of freedom 
# Null hypothesis probability =   9.133322e-01
 
Photon flux (15-150 keV)    in 76.86 sec: 0.175374 ( -0.0140814  0.0140875 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.58411e-07 ( -8.25961e-08  8.40549e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.48688     ( -0.689562   0.588988 )
Epeak [keV] : 52.1641      ( -34.2968 -52.1641 )
Norm@50keV  : 2.10617E-03    ( -0.00109238   0.00299553 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          41.59 using 59 PHA bins.
# Reduced chi-squared =         0.7427 for     56 degrees of freedom 
# Null hypothesis probability =   9.243762e-01
 
Photon flux (15-150 keV)    in 76.86 sec: 0.171744 ( -0.014916  0.014903 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.20788e-07 ( -9.57291e-08  9.82348e-08 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.48665   ( 1.58667   0.637846 )
beta        : -10.0000    ( 10   1.06581e-14 )
Epeak [keV] : 52.1356      ( -30.5034 -52.1356 )
Norm@50keV   : 2.10666E-03    ( -0.00101142   0.00299017 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          41.59 using 59 PHA bins.
# Reduced chi-squared =         0.7562 for     55 degrees of freedom 
# Null hypothesis probability =   9.090881e-01
 
Photon flux (15-150 keV)    in 76.86 sec: 0.171350 ( 6.82865  -0.01366 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.245e-07 ( 0  0 ) ergs/cm2

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

S(25-50 keV)  = 2.52e-07
S(50-100 keV) = 2.67e-07

T90 vs. Hardness ratio plot

T90                                   = 60.6920000314713 sec.
Hardness ratio (energy fluence ratio) = 1.05952

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.11811
Count Ratio (50-100 keV) / (15-25 keV) = 0.579673

Mask shadow pattern

IMX = 3.237772217447339E-01, IMY = 8.145229681387896E-02

TIME vs. PHA plot around the trigger time

TIME vs. DetID plot around the trigger time

100 us light curve (15-350 keV)

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:
-263.899410 -14.432000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
126.8207 -44.5284    2.4  53.9  161.1   4.9071   4.7 ------	UNKNOWN                       
 21.8153   0.5255    2.3  47.9   -6.3   1.6255   5.0 ------	UNKNOWN

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

Time interval of the image:
-14.432000 62.428000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
136.7863 -60.2387    2.1  55.0 -178.2   1.9253   5.4 ------	UNKNOWN                       
 37.3288 -25.1449    0.6  18.5  -14.1   1.6051  18.5 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
113.300600 789.700590
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 45.8204   8.6484    2.4  34.8   48.0   2.7793   4.7 ------	UNKNOWN                       
 30.2910  24.4842    3.2  50.1   24.8   4.8447   3.7 ------	UNKNOWN

Plot creation:
Sun May 31 05:09:44 EDT 2015