batgrbproduct analysis for trigger=535960

batgrbproduct Analysis for Trigger=535960

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): Mon Jan 13 00:01:32 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger535960
======================================================================

  Trigger: 00535960      Segment: 000

  BAT Trigger Time: 371938326.208   [s; MET]
      Trigger Stop: 371938326.72   [s; MET]
               UTC: 2012-10-14T20:11:56.448420    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 166.630696384298   Dec: -29.1090441328934  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    11.69
     Image Trigger?:     NO
     Rate S/N Ratio:     22.956480566498  [ if not an image trigger ]
     Image S/N Ratio:    11.69

  Flight Position:   [ source = BAT ]
    RA: 166.630696384298   Dec: -29.1090441328934  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 166.650291651359   Dec: -29.1086598526773  [deg; J2000]  
        { 11h 06m 36.1s , -29d 06' 31.2" }
         +/- 1.59548380864483 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.672821436330319 [arcmin] (formal 1-sigma fit error)
    SNR: 15.6052989384844
 
  Angular difference between Flight and Ground position is 1.027478 arcmin
 
  Partial Coding Fraction: 0.7265625    [ including projection effects ]

  Duration
     T90: 80 +/- 22.6274169979695
        Measured from: -15.2080000042915
                   to: 64.7919999957085     [s; relative to TRIGTIME]
     T50: 32 +/- 16
        Measured from: 16.7919999957085
                   to: 48.7919999957085     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 56.2919999957085     
                   to: 57.2919999957085     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -15.2080000042915     
                   to: 64.7919999957085     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.633158   0.700432   0.415270   0.041049
           0.056578   0.057809   0.049917   0.041685 [error]
 Peak      0.032264   0.020570   0.000546   0.002167
           0.006777   0.006779   0.005679   0.004678 [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 2.11e-07 3.08e-07 3.37e-07 6.89e-07 1.07e-06 1.55e-06   erg/cm2
              Error 2.96e-08 2.80e-08 4.99e-08 2.09e-07 1.14e-07 2.57e-07   erg/cm2
Peak flux Power-law 3.55e-01 1.43e-01 3.37e-02 9.64e-03 5.38e-01 5.42e-01   ph/cm2/s
              Error 1.15e-01 6.57e-02 3.67e-02 1.87e-02 1.67e-01 1.70e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.11e-07 3.09e-07 3.37e-07 6.82e-07 1.07e-06 1.54e-06   erg/cm2
              Error 2.94e-08 2.80e-08 4.99e-08 1.66e-07 1.20e-07 3.50e-07   erg/cm2
Peak flux Cutoff-PL 3.58e-01 1.63e-01 1.01e-02 3.44e-05 5.31e-01 5.31e-01   ph/cm2/s
              Error 1.25e-01 8.56e-02 3.24e-02 3.30e-03 1.58e-01 1.58e-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    1.873    0.174    -      -           1.45e-03 1.55e-04   60.350 57
CPL   1.881    0.446    9999.4    0.0      1.45e-03 0.00e+00   60.360 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    3.084    0.902    -      -           1.84e-03 1.36e-03   48.840 57
CPL   1.034    0.000      12.9    0.0      5.82e-02 0.00e+00   48.020 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: 55.040000 sec.
T50 in the 50-300 keV band: 31.232000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   80.000  -15.208   64.792
T90    80.000  -15.208   64.792
T50    32.000   16.792   48.792
Peak    1.000   56.292   57.292

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
  166.6503   -29.1087   0.0123    32.6615   -25.5862         1.9693963     15.605 TRIG_00535960                 
 
Foreground time interval of the image:
-15.208  64.792 (delta_t =  80.000 [sec])
Background time interval of the image:
-239.208 -15.208 (delta_t = 224.000 [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 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  -15.208 sec. to   64.792 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.87324     ( -0.170569   0.176782 )
Norm@50keV  : 1.45097E-03    ( -0.000156937   0.000153687 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.35 using 59 PHA bins.
# Reduced chi-squared =          1.059 for     57 degrees of freedom 
# Null hypothesis probability =   3.555931e-01
 
Photon flux (15-150 keV)    in 80 sec: 0.205904 ( -0.0189543  0.0189748 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.0671e-06 ( -1.13594e-07  1.15154e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -15.208 sec. to   64.792 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.88066     ( -0.222189   0.669891 )
Epeak [keV] : 9999.36      (   )
Norm@50keV  : 1.44567E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.36 using 59 PHA bins.
# Reduced chi-squared =          1.078 for     56 degrees of freedom 
# Null hypothesis probability =   3.212939e-01
 
Photon flux (15-150 keV)    in 80 sec: 0.205917 ( -0.019307  0.018887 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.06658e-06 ( -1.24984e-07  1.14232e-07 ) ergs/cm2

Band function

Time interval is from  -15.208 sec. to   64.792 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.33396   ( 1.33397   6.12881 )
beta        : -1.93331    ( 1.93326   0.223875 )
Epeak [keV] : 38.1432      ( -38.118 128.569 )
Norm@50keV   : 3.33506E-03    ( -0.00203327   0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.14 using 59 PHA bins.
# Reduced chi-squared =          1.093 for     55 degrees of freedom 
# Null hypothesis probability =   2.950535e-01
 
Photon flux (15-150 keV)    in 80 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]    : 10.5445  (-1.22376  1.42221)
R^2/D10^2   : 7.68757E-02  (-0.0291828   0.0461265)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          94.73 using 59 PHA bins.
# Reduced chi-squared =          1.662 for     57 degrees of freedom 
# Null hypothesis probability =   1.254625e-03
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.415e-07   2.592e-08
25- 50  3.785e-07   4.652e-08
50-150  2.298e-07   6.100e-08
15-150  7.498e-07   9.276e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 88.8670       (-25.4354      45.3662)
Norm        : 0.928848       (-0.124022     0.152204)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.69 using 59 PHA bins.
# Reduced chi-squared =          1.100 for     57 degrees of freedom 
# Null hypothesis probability =   2.816021e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.938e-07   2.768e-08
25- 50  3.269e-07   3.512e-08
50-150  4.939e-07   2.002e-07
15-150  1.015e-06   2.280e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.70117        (-1.54248      1.63699)
R1^2/D10^2  : 0.334966        (-0.175011      0.515587)
kT2 [keV]   : 28.4222        (-9.72283      34.2088)
R2^2/D10^2  : 1.42164E-03    (-0.00123034   0.00547381)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.44 using 59 PHA bins.
# Reduced chi-squared =          1.117 for     55 degrees of freedom 
# Null hypothesis probability =   2.564396e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.992e-07   6.012e-08
25- 50  3.212e-07   9.724e-08
50-150  5.534e-07   2.836e-07
15-150  1.074e-06   3.876e-07

Peak spectrum fit

Power-law model

Time interval is from   56.292 sec. to   57.292 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 3.08398     ( -0.736815   1.06665 )
Norm@50keV  : 1.83896E-03    ( -0.00121822   0.00150606 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.84 using 59 PHA bins.
# Reduced chi-squared =         0.8569 for     57 degrees of freedom 
# Null hypothesis probability =   7.705869e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.537930 ( -0.166353  0.167661 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.29931e-08 ( -8.93034e-09  1.05443e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   56.292 sec. to   57.292 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.03388     (     )
Epeak [keV] : 12.8538      (   )
Norm@50keV  : 5.82260E-02    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.02 using 59 PHA bins.
# Reduced chi-squared =         0.8574 for     56 degrees of freedom 
# Null hypothesis probability =   7.672470e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.530912 ( -0.157431  0.159168 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.0338e-08 ( -6.7951e-09  6.2335e-09 ) ergs/cm2

Band function

Time interval is from   56.292 sec. to   57.292 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 0.386741   ( 1.65283   1.65283 )
beta        : -9.01027    ( 5.27573   2.81264 )
Epeak [keV] : 19.0402      ( -14.3738 13.4059 )
Norm@50keV   : 0.595751    ( -0.595755   9305.36 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.90 using 59 PHA bins.
# Reduced chi-squared =         0.8708 for     55 degrees of freedom 
# Null hypothesis probability =   7.404072e-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]    : 5.45749  (-1.55514  1.77865)
R^2/D10^2   : 3.15507  (-3.15506   11.6841)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.08 using 59 PHA bins.
# Reduced chi-squared =         0.8436 for     57 degrees of freedom 
# Null hypothesis probability =   7.938229e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.075e-08   6.430e-09
25- 50  8.664e-09   5.525e-09
50-150  5.291e-10   5.150e-10
15-150  1.995e-08   1.173e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 16.1734       (-7.40002      15.1985)
Norm        : 8.68512       (-4.73856     13.5734)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.11 using 59 PHA bins.
# Reduced chi-squared =         0.8440 for     57 degrees of freedom 
# Null hypothesis probability =   7.931678e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.099e-08   6.320e-09
25- 50  8.042e-09   5.052e-09
50-150  1.644e-09   1.500e-09
15-150  2.067e-08   1.272e-08

Double BB

R1^2/D10^2  : 3.55624        (      )
kT2 [keV]   : 198.343        (      )
R2^2/D10^2  : 3.17097E-05    (-3.1738e-05   0.00162916)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.39 using 59 PHA bins.
#Fit statistic : Chi-Squared =          47.26 using 59 PHA bins.
#Fit statistic : Chi-Squared =          46.91 using 59 PHA bins.
# Reduced chi-squared =         0.8617 for     55 degrees of freedom 
# Reduced chi-squared =         0.8592 for     55 degrees of freedom 
# Reduced chi-squared =         0.8529 for     55 degrees of freedom 
# Null hypothesis probability =   7.571772e-01
# Null hypothesis probability =   7.617081e-01
# Null hypothesis probability =   7.728551e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.065e-08   5.425e-09
25- 50  8.915e-09   5.685e-09
50-150  9.370e-10   6.735e-10
15-150  2.050e-08   1.111e-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: 1.87324     ( -0.170569   0.176782 )
Norm@50keV  : 1.45097E-03    ( -0.000156937   0.000153687 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.35 using 59 PHA bins.
# Reduced chi-squared =          1.059 for     57 degrees of freedom 
# Null hypothesis probability =   3.555931e-01
 
Photon flux (15-150 keV)    in 80 sec: 0.205904 ( -0.0189543  0.0189748 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.0671e-06 ( -1.13594e-07  1.15154e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.88066     ( -0.222189   0.669891 )
Epeak [keV] : 9999.36      (   )
Norm@50keV  : 1.44567E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.36 using 59 PHA bins.
# Reduced chi-squared =          1.078 for     56 degrees of freedom 
# Null hypothesis probability =   3.212939e-01
 
Photon flux (15-150 keV)    in 80 sec: 0.205917 ( -0.019307  0.018887 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.06658e-06 ( -1.24984e-07  1.14232e-07 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.33396   ( 1.33397   6.12881 )
beta        : -1.93331    ( 1.93326   0.223875 )
Epeak [keV] : 38.1432      ( -38.118 128.569 )
Norm@50keV   : 3.33506E-03    ( -0.00203327   0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.14 using 59 PHA bins.
# Reduced chi-squared =          1.093 for     55 degrees of freedom 
# Null hypothesis probability =   2.950535e-01
 
Photon flux (15-150 keV)    in 80 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)  = 3.08e-07
S(50-100 keV) = 3.37e-07

T90 vs. Hardness ratio plot

T90                                   = 80 sec.
Hardness ratio (energy fluence ratio) = 1.09416

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.10625
Count Ratio (50-100 keV) / (15-25 keV) = 0.655871

Mask shadow pattern

IMX = 5.781785104130348E-01, IMY = 2.768453301559334E-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:
-239.208000 -15.208000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.5255 -40.5553    0.8  43.3   17.1   4.7404  14.2    0.1	Vela X-1                      
123.5147  32.8737    2.8  42.0  142.9   1.7610   4.1 ------	UNKNOWN                       
158.4024  33.8467    2.5  34.2 -170.8   0.9993   4.6 ------	UNKNOWN                       
174.1599 -53.0036    2.3  56.5  -16.8   3.2558   5.0 ------	UNKNOWN                       
192.5811   8.4050    2.9  41.6 -103.2   3.9943   3.9 ------	UNKNOWN

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

Time interval of the image:
-15.208000 64.792000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.5114 -40.5577    2.3  43.3   17.1  -1.0818  -5.1    0.8	Vela X-1                      
123.4322  36.8297    2.7  44.9  146.8   1.2082   4.3 ------	UNKNOWN                       
164.2670  27.1290    2.6  29.5 -157.5   0.5089   4.4 ------	UNKNOWN                       
166.6503 -29.1087    0.7  32.7  -25.6   1.9697  15.6 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:

Plot creation:
Sat May 30 18:08:58 EDT 2015