batgrbproduct analysis for trigger=177533

batgrbproduct Analysis for Trigger=177533

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 18:51:25 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger177533
======================================================================

  Trigger: 00177533      Segment: 000

  BAT Trigger Time: 159093448.192   [s; MET]
      Trigger Stop: 159093464.576   [s; MET]
               UTC: 2006-01-16T08:37:27.233480    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 84.6992896947215   Dec: -5.4486871468953  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    6.58
     Image Trigger?:     NO
     Rate S/N Ratio:     10.4403065089106  [ if not an image trigger ]
     Image S/N Ratio:    6.58

  Flight Position:   [ source = BAT ]
    RA: 84.6992896947215   Dec: -5.4486871468953  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 84.701028157119   Dec: -5.44075165544001  [deg; J2000]  
        { 05h 38m 48.2s , -05d 26' 26.7" }
         +/- 1.71143086121601 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.628663727296607 [arcmin] (formal 1-sigma fit error)
    SNR: 14.117177230572
 
  Angular difference between Flight and Ground position is 0.487321 arcmin
 
  Partial Coding Fraction: 0.2050781    [ including projection effects ]

  Duration
     T90: 104.831999987364 +/- 27.2568347520558
        Measured from: -29.0480000078678
                   to: 75.783999979496     [s; relative to TRIGTIME]
     T50: 31.055999994278 +/- 6.83722515012333
        Measured from: 5.63999998569489
                   to: 36.6959999799728     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 36.3959999978542     
                   to: 37.3959999978542     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -35.7360000014305     
                   to: 78.6319999992847     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.850017   1.214557   1.082156   0.432063
           0.118445   0.122497   0.106289   0.089990 [error]
 Peak      0.026129   0.060425   0.037927   0.017533
           0.012039   0.012471   0.010513   0.008865 [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 2.77e-07 5.52e-07 8.57e-07 2.92e-06 2.39e-06 4.61e-06   erg/cm2
              Error 5.12e-08 6.21e-08 1.03e-07 7.74e-07 2.59e-07 8.41e-07   erg/cm2
Peak flux Power-law 3.74e-01 3.87e-01 2.83e-01 3.32e-01 1.17e+00 1.38e+00   ph/cm2/s
              Error 1.65e-01 1.09e-01 8.16e-02 1.93e-01 3.09e-01 3.44e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.55e-07 5.75e-07 8.89e-07 1.62e-06 2.33e-06 3.33e-06   erg/cm2
              Error 6.09e-08 5.53e-08 1.17e-07 1.23e-06 2.80e-07 1.37e-06   erg/cm2
Peak flux Cutoff-PL 3.47e-01 4.06e-01 2.97e-01 2.11e-01 1.16e+00 1.26e+00   ph/cm2/s
              Error 1.86e-01 1.30e-01 9.62e-02 2.71e-01 3.11e-01 4.01e-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    1.366    0.172    -      -           2.15e-03 2.15e-04   59.050 57
CPL   0.934    0.657     129.6  -38.0      3.48e-03 3.01e-03   57.860 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.454    0.412    -      -           9.51e-03 2.37e-03   40.460 57
CPL   1.024    1.718     117.0    0.0      1.56e-02 0.00e+00   40.230 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: 65.920000 sec.
T50 in the 50-300 keV band: 25.088000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  114.368  -35.736   78.632
T90   104.832  -29.048   75.784
T50    31.056    5.640   36.696
Peak    1.000   36.396   37.396

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
   84.7010    -5.4408   0.0136    37.9331   127.9743         3.4115524     14.117 TRIG_00177533                 
 
Foreground time interval of the image:
-35.736  66.509 (delta_t = 102.245 [sec])
Background time interval of the image:
-299.192 -35.736 (delta_t = 263.456 [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 16.384000

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 16.384000

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 16.384000

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  -35.736 sec. to   78.632 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.36551     ( -0.173006   0.170991 )
Norm@50keV  : 2.14768E-03    ( -0.000215434   0.000215371 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.05 using 59 PHA bins.
# Reduced chi-squared =          1.036 for     57 degrees of freedom 
# Null hypothesis probability =   4.004280e-01
 
Photon flux (15-150 keV)    in 114.4 sec: 0.259574 ( -0.0273083  0.0273929 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.39142e-06 ( -2.58237e-07  2.59656e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -35.736 sec. to   78.632 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.934284     ( -0.785647   0.528767 )
Epeak [keV] : 129.602      ( -53.6888 -129.603 )
Norm@50keV  : 3.48331E-03    ( -0.0013325   0.0046907 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.86 using 59 PHA bins.
# Reduced chi-squared =          1.033 for     56 degrees of freedom 
# Null hypothesis probability =   4.064454e-01
 
Photon flux (15-150 keV)    in 114.4 sec: 0.254903 ( -0.028338  0.028331 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.32934e-06 ( -2.8203e-07  2.78861e-07 ) ergs/cm2

Band function

Time interval is from  -35.736 sec. to   78.632 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.81060   ( -4.8106   -4.8106 )
beta        : -1.47309    ( -0.20946   0.20116 )
Epeak [keV] : 27.6594      ( -8.62731 6.27139 )
Norm@50keV   : 81.4464    ( -8.13088   737214 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.96 using 59 PHA bins.
# Reduced chi-squared =          1.036 for     55 degrees of freedom 
# Null hypothesis probability =   4.021606e-01
 
Photon flux (15-150 keV)    in 114.4 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]    : 16.7087  (-1.99972  2.38207)
R^2/D10^2   : 2.09633E-02  (-0.00780469   0.0118121)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          75.04 using 59 PHA bins.
# Reduced chi-squared =          1.316 for     57 degrees of freedom 
# Null hypothesis probability =   5.488538e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.370e-07   2.831e-08
25- 50  5.977e-07   9.489e-08
50-150  1.185e-06   2.337e-07
15-150  1.919e-06   2.723e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (      )
Norm        : 1.08604       (-0.109355     0.109346)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.46 using 59 PHA bins.
# Reduced chi-squared =          1.078 for     57 degrees of freedom 
# Null hypothesis probability =   3.192848e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.094e-07   9.324e-08
25- 50  5.951e-07   2.143e-07
50-150  1.305e-06   6.319e-07
15-150  2.210e-06   9.589e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.92332        (-4.03571      3.83064)
R1^2/D10^2  : 0.112972        (-0.0610012      0.445349)
kT2 [keV]   : 32.0154        (-34.8887      -34.8889)
R2^2/D10^2  : 1.67558E-03    (-0.00121984   0.00708336)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.27 using 59 PHA bins.
# Reduced chi-squared =          1.059 for     55 degrees of freedom 
# Null hypothesis probability =   3.560151e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.290e-07   1.254e-07
25- 50  6.051e-07   3.181e-07
50-150  1.470e-06   7.890e-07
15-150  2.304e-06   1.187e-06

Peak spectrum fit

Power-law model

Time interval is from   36.396 sec. to   37.396 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.45362     ( -0.416391   0.408154 )
Norm@50keV  : 9.51113E-03    ( -0.00237426   0.00237201 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          40.46 using 59 PHA bins.
# Reduced chi-squared =         0.7098 for     57 degrees of freedom 
# Null hypothesis probability =   9.522617e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.17317 ( -0.307811  0.309782 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.09549e-08 ( -2.38791e-08  2.40557e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   36.396 sec. to   37.396 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.02419     ( -2.04188   1.39394 )
Epeak [keV] : 117.039      ( -117.062 -117.062 )
Norm@50keV  : 1.56430E-02    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          40.23 using 59 PHA bins.
# Reduced chi-squared =         0.7183 for     56 degrees of freedom 
# Null hypothesis probability =   9.445749e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.16150 ( -0.310096  0.31232 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.92765e-08 ( -2.54756e-08  2.48675e-08 ) ergs/cm2

Band function

Time interval is from   36.396 sec. to   37.396 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 5.00000   ( -5   -5 )
beta        : -1.76461    ( -0.826718   0.551521 )
Epeak [keV] : 32.5691      ( -32.5579 54.433 )
Norm@50keV   : 207.956    ( -51.196   5.54196e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          38.93 using 59 PHA bins.
# Reduced chi-squared =         0.7079 for     55 degrees of freedom 
# Null hypothesis probability =   9.503191e-01
 
Photon flux (15-150 keV)    in 1 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.82198e-08 ( 0  0 ) ergs/cm2

Single BB

 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 15.3023  (-4.42848  6.82239)
R^2/D10^2   : 0.128320  (-0.0932805   0.303527)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          44.04 using 59 PHA bins.
# Reduced chi-squared =         0.7726 for     57 degrees of freedom 
# Null hypothesis probability =   8.955519e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.269e-09   3.501e-09
25- 50  2.537e-08   1.282e-08
50-150  4.078e-08   2.277e-08
15-150  7.241e-08   3.980e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (-113.135      -199.363)
Norm        : 4.90342       (-1.22138     1.22224)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          40.43 using 59 PHA bins.
# Reduced chi-squared =         0.7093 for     57 degrees of freedom 
# Null hypothesis probability =   9.525529e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.221e-08   7.330e-09
25- 50  2.349e-08   1.427e-08
50-150  5.151e-08   2.956e-08
15-150  8.721e-08   5.260e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.63321        (-4.40942      6.31295)
R1^2/D10^2  : 0.672798        (-0.475526      4.2636)
kT2 [keV]   : 33.7439        (-23.4527      -40.5215)
R2^2/D10^2  : 5.55020E-03    (-0.00314979   0.0712337)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          39.34 using 59 PHA bins.
# Reduced chi-squared =         0.7152 for     55 degrees of freedom 
# Null hypothesis probability =   9.451416e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.046e-08   6.820e-09
25- 50  2.490e-08   1.548e-08
50-150  5.141e-08   3.096e-08
15-150  8.676e-08   4.625e-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: 1.34995     ( -0.174454   0.172185 )
Norm@50keV  : 2.22224E-03    ( -0.000228582   0.000228557 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.15 using 59 PHA bins.
# Reduced chi-squared =          1.090 for     57 degrees of freedom 
# Null hypothesis probability =   2.977157e-01
 
Photon flux (15-150 keV)    in 102.2 sec: 0.267712 ( -0.0288625  0.0289598 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.21818e-06 ( -2.44858e-07  2.46218e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.652869     ( -0.872906   0.712515 )
Epeak [keV] : 101.242      ( -30.9698 7853.67 )
Norm@50keV  : 4.84460E-03    ( -0.00260214   0.00762162 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.40 using 59 PHA bins.
# Reduced chi-squared =          1.061 for     56 degrees of freedom 
# Null hypothesis probability =   3.527416e-01
 
Photon flux (15-150 keV)    in 102.2 sec: 0.260071 ( -0.030078  0.030059 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.1262e-06 ( -2.68653e-07  2.67335e-07 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.281131   ( -0.864223   0.276012 )
beta        : -1.75561    ( 1.7625   0.448797 )
Epeak [keV] : 75.2197      ( -38.6601 251.33 )
Norm@50keV   : 7.96589E-03    ( -0.0081495   31.5947 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.73 using 59 PHA bins.
# Reduced chi-squared =          1.068 for     55 degrees of freedom 
# Null hypothesis probability =   3.403720e-01
 
Photon flux (15-150 keV)    in 102.2 sec: 0.258455 ( 6.74155  -0.030148 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.12703e-06 ( -2.12631e-06  -2.59782e-07 ) ergs/cm2

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

S(25-50 keV)  = 5.52e-07
S(50-100 keV) = 8.57e-07

T90 vs. Hardness ratio plot

T90                                   = 104.831999987364 sec.
Hardness ratio (energy fluence ratio) = 1.55254

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.42886
Count Ratio (50-100 keV) / (15-25 keV) = 1.2731

Mask shadow pattern

IMX = -4.795761723661797E-01, IMY = -6.143969452651807E-01

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 16.384000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 16.384000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 16.384000

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:
-299.192000 -35.736000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6358  22.0173    0.3  28.2   79.4  11.5839  40.3    0.2	Crab                          
 68.2851  -7.1796    2.5  28.3  152.7   1.0351   4.7 ------	UNKNOWN                       
 42.5425 -40.6336    4.6  59.0 -166.2   3.3180   2.5 ------	UNKNOWN                       
  2.0507  42.9137    4.4  50.7  -44.5   2.9019   2.6 ------	UNKNOWN                       
 12.9182   8.6580    4.4  40.9  -93.2   2.5777   2.7 ------	UNKNOWN

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

Time interval of the image:
-35.736000 66.508590
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.7447  21.9106    7.8  28.3   79.6  -0.2498  -1.5    8.8	Crab                          
 84.7010  -5.4408    0.8  37.9  128.0   3.4121  14.1 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
137.108620 302.879200
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6308  22.0205    0.3  27.5   37.9   7.2393  41.3    0.4	Crab                          
 63.9770 -46.5780    2.3  44.8 -119.9   3.1938   5.0 ------	UNKNOWN

Plot creation:
Sun May 31 14:28:06 EDT 2015