batgrbproduct analysis for trigger=355303

batgrbproduct Analysis for Trigger=355303

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 15:53:56 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger355303
======================================================================

  Trigger: 00355303      Segment: 000

  BAT Trigger Time: 267250968   [s; MET]
      Trigger Stop: 267250976.192   [s; MET]
               UTC: 2009-06-21T04:22:43.155300    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 10.9861581404119   Dec: 61.9679004327154  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.8
     Image Trigger?:     NO
     Rate S/N Ratio:     7.28010988928052  [ if not an image trigger ]
     Image S/N Ratio:    7.8

  Flight Position:   [ source = BAT ]
    RA: 10.9861581404119   Dec: 61.9679004327154  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 10.987544246165   Dec: 61.9386576388914  [deg; J2000]  
        { 00h 43m 57.0s , +61d 56' 19.2" }
         +/- 1.68809163958159 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.622900260053021 [arcmin] (formal 1-sigma fit error)
    SNR: 14.3968315848615
 
  Angular difference between Flight and Ground position is 1.755003 arcmin
 
  Partial Coding Fraction: 0.7734375    [ including projection effects ]

  Duration
     T90: 219.236000001431 +/- 72.378491614085
        Measured from: -1.53999999165535
                   to: 217.696000009775     [s; relative to TRIGTIME]
     T50: 106.532000005245 +/- 60.6811145451002
        Measured from: 77.2759999930859
                   to: 183.807999998331     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 239.847999989986     
                   to: 240.847999989986     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -31.0480000078678     
                   to: 241.747999995947     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.624493   1.946231   1.309509   0.192701
           0.083837   0.086721   0.076380   0.066600 [error]
 Peak      0.093355   0.118441   0.065568   0.022200
           0.006199   0.006481   0.005541   0.004220 [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 4.74e-07 7.84e-07 9.83e-07 2.45e-06 2.93e-06 4.69e-06   erg/cm2
              Error 4.23e-08 4.22e-08 7.50e-08 3.99e-07 1.75e-07 4.59e-07   erg/cm2
Peak flux Power-law 8.80e-01 7.76e-01 4.70e-01 4.30e-01 2.31e+00 2.55e+00   ph/cm2/s
              Error 9.35e-02 5.22e-02 4.51e-02 8.20e-02 1.54e-01 1.71e-01   ph/cm2/s
 
Fluence   Cutoff-PL 4.46e-07 8.12e-07 9.96e-07 1.38e-06 2.83e-06 3.64e-06   erg/cm2
              Error 5.03e-08 5.11e-08 7.95e-08 8.11e-07 2.00e-07 8.20e-07   erg/cm2
Peak flux Cutoff-PL 8.71e-01 7.83e-01 4.71e-01 3.80e-01 2.30e+00 2.50e+00   ph/cm2/s
              Error 1.02e-01 6.18e-02 4.61e-02 1.53e-01 1.59e-01 2.27e-01   ph/cm2/s
 
Fluence        Band 4.44e-07 8.07e-07 9.96e-07 1.47e-06 2.84e-06 3.72e-06   erg/cm2
              Error 4.55e-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    1.674    0.098    -      -           1.16e-03 6.49e-05   70.830 57
CPL   1.299    0.389      90.5  463.2      1.80e-03 8.53e-04   67.860 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.724    0.120    -      -           1.72e-02 1.26e-03   64.970 57
CPL   1.631    0.494     152.5    0.0      1.94e-02 0.00e+00   64.860 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: 188.736000 sec.
T50 in the 50-300 keV band: 98.240000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  272.796  -31.048  241.748
T90   219.236   -1.540  217.696
T50   106.532   77.276  183.808
Peak    1.000  239.848  240.848

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
   10.9875    61.9387   0.0133    27.6519   -35.8055         1.6051573     14.397 TRIG_00355303                 
 
Foreground time interval of the image:
-31.048  50.301 (delta_t =  81.349 [sec])
Background time interval of the image:
-239.000 -31.048 (delta_t = 207.952 [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  -31.048 sec. to  241.748 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.67387     ( -0.0976553   0.0988712 )
Norm@50keV  : 1.15642E-03    ( -6.51433e-05   6.47507e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          70.83 using 59 PHA bins.
# Reduced chi-squared =          1.243 for     57 degrees of freedom 
# Null hypothesis probability =   1.030062e-01
 
Photon flux (15-150 keV)    in 272.8 sec: 0.152210 ( -0.00821267  0.00822468 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.92733e-06 ( -1.74675e-07  1.75968e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -31.048 sec. to  241.748 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.29940     ( -0.406777   0.371635 )
Epeak [keV] : 90.5368      ( -25.149 901.25 )
Norm@50keV  : 1.80080E-03    ( -0.00062587   0.00108082 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.86 using 59 PHA bins.
# Reduced chi-squared =          1.212 for     56 degrees of freedom 
# Null hypothesis probability =   1.331278e-01
 
Photon flux (15-150 keV)    in 272.8 sec: 0.148850 ( -0.008825  0.008828 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.83022e-06 ( -1.99324e-07  2.00181e-07 ) ergs/cm2

Band function

Time interval is from  -31.048 sec. to  241.748 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.29951   ( -0.267506   0.436426 )
beta        : -10.0000    ( 10   1.77636e-15 )
Epeak [keV] : 90.5332      ( -25.1364 895.678 )
Norm@50keV   : 1.80032E-03    ( -0.000625743   0.00108171 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.86 using 59 PHA bins.
# Reduced chi-squared =          1.234 for     55 degrees of freedom 
# Null hypothesis probability =   1.143078e-01
 
Photon flux (15-150 keV)    in 272.8 sec: 0.148229 ( 6.85177  -0.00781 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.83554e-06 ( 0  0 ) ergs/cm2

Single BB

 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 13.4041  (  )
R^2/D10^2   : 2.41476E-02  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         143.74 using 59 PHA bins.
# Reduced chi-squared =         2.5217 for     57 degrees of freedom 
# Null hypothesis probability =   1.938961e-09
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.508e-07   2.361e-08
25- 50  8.923e-07   5.238e-08
50-150  1.031e-06   1.274e-07
15-150  2.174e-06   1.468e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 146.676       (-34.8372      46.3659)
Norm        : 0.622554       (-0.0379895     0.0473884)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          68.01 using 59 PHA bins.
# Reduced chi-squared =          1.193 for     57 degrees of freedom 
# Null hypothesis probability =   1.507389e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.370e-07   3.437e-08
25- 50  8.074e-07   8.539e-08
50-150  1.579e-06   5.332e-07
15-150  2.823e-06   5.762e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.26563        (-1.11482      1.21031)
R1^2/D10^2  : 0.238360        (-0.108553      0.255134)
kT2 [keV]   : 22.3076        (-3.18913      4.65017)
R2^2/D10^2  : 3.06100E-03    (-0.0015696   0.002523)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.88 using 59 PHA bins.
# Reduced chi-squared =          1.234 for     55 degrees of freedom 
# Null hypothesis probability =   1.138790e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.365e-07   8.389e-08
25- 50  8.013e-07   1.229e-07
50-150  1.558e-06   3.596e-07
15-150  2.796e-06   4.864e-07

Peak spectrum fit

Power-law model

Time interval is from  239.848 sec. to  240.848 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.72418     ( -0.118968   0.12098 )
Norm@50keV  : 1.72349E-02    ( -0.00126959   0.00125642 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.97 using 59 PHA bins.
# Reduced chi-squared =          1.140 for     57 degrees of freedom 
# Null hypothesis probability =   2.187415e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.30867 ( -0.154253  0.154339 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.59291e-07 ( -1.22325e-08  1.2347e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from  239.848 sec. to  240.848 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.63073     ( -0.477146   0.511394 )
Epeak [keV] : 152.519      (   )
Norm@50keV  : 1.93853E-02    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.86 using 59 PHA bins.
# Reduced chi-squared =          1.158 for     56 degrees of freedom 
# Null hypothesis probability =   1.951704e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.30012 ( -0.15947  0.15908 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.57963e-07 ( -1.4165e-08  1.339e-08 ) ergs/cm2

Band function

Time interval is from  239.848 sec. to  240.848 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 0.438439   ( -2.04489   -0.607592 )
beta        : -1.90204    ( -0.236947   0.197822 )
Epeak [keV] : 33.5394      ( -9.97893 21.7691 )
Norm@50keV   : 0.513456    ( -0.504757   1216.88 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.70 using 59 PHA bins.
# Reduced chi-squared =          1.104 for     55 degrees of freedom 
# Null hypothesis probability =   2.779689e-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]    : 10.9637  (  )
R^2/D10^2   : 0.759742  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         124.97 using 59 PHA bins.
# Reduced chi-squared =         2.1925 for     57 degrees of freedom 
# Null hypothesis probability =   5.382478e-07
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.907e-08   2.140e-09
25- 50  5.369e-08   4.025e-09
50-150  3.636e-08   5.820e-09
15-150  1.091e-07   8.615e-09

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 122.634       (-31.6515      49.6163)
Norm        : 9.75420       (-0.81194     0.98022)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.37 using 59 PHA bins.
# Reduced chi-squared =          1.164 for     57 degrees of freedom 
# Null hypothesis probability =   1.853147e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.538e-08   2.410e-09
25- 50  4.558e-08   4.390e-09
50-150  8.221e-08   2.905e-08
15-150  1.532e-07   3.120e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.50774        (-0.899983      0.950634)
R1^2/D10^2  : 2.47821        (-0.842422      1.39374)
kT2 [keV]   : 35.5939        (-8.98857      19.1674)
R2^2/D10^2  : 8.54216E-03    (-0.0059282   0.013464)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.43 using 59 PHA bins.
# Reduced chi-squared =         0.9896 for     55 degrees of freedom 
# Null hypothesis probability =   4.963296e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.551e-08   4.165e-09
25- 50  4.746e-08   7.865e-09
50-150  8.973e-08   4.227e-08
15-150  1.627e-07   4.813e-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: 1.65152     ( -0.157685   0.161094 )
Norm@50keV  : 1.37895E-03    ( -0.000131807   0.000130256 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.18 using 59 PHA bins.
# Reduced chi-squared =         0.9857 for     57 degrees of freedom 
# Null hypothesis probability =   5.056945e-01
 
Photon flux (15-150 keV)    in 81.35 sec: 0.180148 ( -0.0159964  0.0160108 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.04313e-06 ( -1.05887e-07  1.07149e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.38101     ( -0.62275   0.402763 )
Epeak [keV] : 109.874      ( -52.1274 -109.875 )
Norm@50keV  : 1.91021E-03    ( -0.000652693   0.00205868 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.50 using 59 PHA bins.
# Reduced chi-squared =         0.9910 for     56 degrees of freedom 
# Null hypothesis probability =   4.938933e-01
 
Photon flux (15-150 keV)    in 81.35 sec: 0.177889 ( -0.016637  0.016622 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.01999e-06 ( -1.16404e-07  1.17087e-07 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.38057   ( -0.437655   0.455201 )
beta        : -10.0000    ( 10   1.77636e-15 )
Epeak [keV] : 109.724      ( -48.4729 -109.724 )
Norm@50keV   : 1.91108E-03    ( -0.000644142   0.00205856 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.50 using 59 PHA bins.
# Reduced chi-squared =          1.009 for     55 degrees of freedom 
# Null hypothesis probability =   4.559270e-01
 
Photon flux (15-150 keV)    in 81.35 sec: 0.176921 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.02162e-06 ( 0  0 ) ergs/cm2

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

S(25-50 keV)  = 7.84e-07
S(50-100 keV) = 9.83e-07

T90 vs. Hardness ratio plot

T90                                   = 219.236000001431 sec.
Hardness ratio (energy fluence ratio) = 1.25383

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.19805
Count Ratio (50-100 keV) / (15-25 keV) = 0.806103

Mask shadow pattern

IMX = 4.249211462681622E-01, IMY = 3.065245283774237E-01

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:
-239.000000 -31.048000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
299.5872  35.1902    1.0  43.2   56.8   7.6772  11.4    0.7	Cyg X-1                       
308.1806  40.8171    9.0  37.9   45.9   0.4348   1.3    8.7	Cyg X-3                       
325.9966  38.3656    5.6  42.1   25.2   0.6642   2.1    8.7	Cyg X-2

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

Time interval of the image:
-31.048000 50.300590
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
299.6188  35.0393    0.0  43.4   56.8  -0.2717  -0.7    9.8	Cyg X-1                       
308.3499  40.9395   12.1  37.8   45.7  -0.1984  -1.0   10.9	Cyg X-3                       
326.1502  38.3125   29.2  42.1   25.0  -0.0802  -0.4    1.1	Cyg X-2                       
211.9308  45.4121    1.9  44.2  157.5   1.3109   6.0 ------	UNKNOWN                       
 10.9875  61.9387    0.8  27.7  -35.8   1.6052  14.4 ------	UNKNOWN                       
 21.4427  42.2899    2.1  48.2  -34.5   1.4186   5.6 ------	UNKNOWN                       
102.4835  65.4538    2.3  36.0 -108.5   0.9990   5.0 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
101.300590 243.052300
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
326.0197  38.3361    8.8  36.1   72.5   0.3967   1.3    7.2	Cyg X-2                       
303.9098  46.8567    2.2  39.7  101.9   2.5083   5.4 ------	UNKNOWN                       
  3.5399   7.5728    2.5  54.7   11.3   2.9676   4.7  501.3	UNKNOWN                       
 10.9918  61.9355    0.4   0.0    0.3   3.5612  29.5 ------	UNKNOWN

Plot creation:
Sun May 31 03:45:05 EDT 2015