batgrbproduct analysis for trigger=444643

batgrbproduct Analysis for Trigger=444643

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): Tue Jan 14 00:29:18 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger444643
======================================================================

  Trigger: 00444643      Segment: 000

  BAT Trigger Time: 318564168   [s; MET]
      Trigger Stop: 318564232   [s; MET]
               UTC: 2011-02-05T02:02:41.367420    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 164.588577929917   Dec: 67.5160714352078  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    10.04
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    10.04

  Flight Position:   [ source = BAT ]
    RA: 164.588577929917   Dec: 67.5160714352078  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 164.604035535156   Dec: 67.5319128004809  [deg; J2000]  
        { 10h 58m 25.0s , +67d 31' 54.9" }
         +/- 2.19279854264686 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.9214186084597 [arcmin] (formal 1-sigma fit error)
    SNR: 9.90780228776275
 
  Angular difference between Flight and Ground position is 1.014461 arcmin
 
  Partial Coding Fraction: 0.2929688    [ including projection effects ]

  Duration
     T90: 249.415999948978 +/- 15.0347185018493
        Measured from: 35.688000023365
                   to: 285.103999972343     [s; relative to TRIGTIME]
     T50: 103.427999913692 +/- 6.25424652328269
        Measured from: 115.276000022888
                   to: 218.703999936581     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 210.439999997616     
                   to: 211.439999997616     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -130.15600001812     
                   to: 377.231999993324     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     8.410523  10.143950   7.020187   1.572839
           0.154099   0.160031   0.141811   0.124900 [error]
 Peak      0.102615   0.143083   0.128223   0.038884
           0.005912   0.006797   0.006422   0.004809 [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 2.56e-06 4.23e-06 5.31e-06 1.33e-05 1.58e-05 2.54e-05   erg/cm2
              Error 1.17e-07 1.08e-07 1.53e-07 8.88e-07 3.64e-07 9.62e-07   erg/cm2
Peak flux Power-law 9.20e-01 1.02e+00 8.01e-01 1.04e+00 3.12e+00 3.78e+00   ph/cm2/s
              Error 8.57e-02 5.72e-02 5.09e-02 1.39e-01 1.62e-01 2.02e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.51e-06 4.25e-06 5.35e-06 1.18e-05 1.57e-05 2.39e-05   erg/cm2
              Error 1.52e-07 1.13e-07 1.62e-07 2.21e-06 4.25e-07 2.38e-06   erg/cm2
Peak flux Cutoff-PL 8.98e-01 1.03e+00 8.10e-01 9.05e-01 3.11e+00 3.64e+00   ph/cm2/s
              Error 1.02e-01 6.37e-02 5.72e-02 2.29e-01 1.66e-01 3.27e-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    1.672    0.045    -      -           3.36e-03 7.48e-05   42.140 57
CPL   1.588    0.153     263.3  -48.3      3.68e-03 5.60e-04   41.460 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.344    0.091    -      -           2.60e-02 1.33e-03   70.560 57
CPL   1.226    0.254     343.7    0.0      2.97e-02 9.13e-03   70.170 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: 252.800000 sec.
T50 in the 50-300 keV band: 99.392000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  507.388 -130.156  377.232
T90   249.416   35.688  285.104
T50   103.428  115.276  218.704
Peak    1.000  210.440  211.440

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
  164.6040    67.5319   0.0194    43.2174   160.0189         2.7603191      9.908 TRIG_00444643                 
 
Foreground time interval of the image:
-70.099  72.101 (delta_t = 142.200 [sec])
Background time interval of the image:

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)

The mask-weighted light curves based on cleaned DPHs

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 -130.156 sec. to  377.232 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.67190     ( -0.0446708   0.0447628 )
Norm@50keV  : 3.36028E-03    ( -7.48361e-05   7.48079e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          42.14 using 59 PHA bins.
# Reduced chi-squared =         0.7393 for     57 degrees of freedom 
# Null hypothesis probability =   9.293805e-01
 
Photon flux (15-150 keV)    in 507.4 sec: 0.441991 ( -0.0113069  0.0113565 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.5824e-05 ( -3.6419e-07  3.64593e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from -130.156 sec. to  377.232 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.58775     ( -0.178412   0.126684 )
Epeak [keV] : 263.345      ( -166.691 -263.346 )
Norm@50keV  : 3.67533E-03    ( -0.000372982   0.000746841 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          41.46 using 59 PHA bins.
# Reduced chi-squared =         0.7403 for     56 degrees of freedom 
# Null hypothesis probability =   9.265804e-01
 
Photon flux (15-150 keV)    in 507.4 sec: 0.438519 ( -0.013143  0.013179 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.57224e-05 ( -4.26317e-07  4.23679e-07 ) ergs/cm2

Band function

Time interval is from -130.156 sec. to  377.232 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.19668   ( 1.20239   5.26793 )
beta        : -1.70650    ( 1.70657   0.0656431 )
Epeak [keV] : 60.0243      ( -61.2336 -61.2336 )
Norm@50keV   : 6.49023E-03    ( -0.0029595   0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          40.54 using 59 PHA bins.
# Reduced chi-squared =         0.7371 for     55 degrees of freedom 
# Null hypothesis probability =   9.274872e-01
 
Photon flux (15-150 keV)    in 507.4 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]    : 15.2406  (  )
R^2/D10^2   : 4.24884E-02  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         485.28 using 59 PHA bins.
# Reduced chi-squared =         8.5136 for     57 degrees of freedom 
# Null hypothesis probability =   3.185345e-69
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.046e-06   5.023e-08
25- 50  4.215e-06   1.329e-07
50-150  6.710e-06   3.070e-07
15-150  1.197e-05   3.070e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 163.657       (-18.6075      23.0167)
Norm        : 1.76801       (-0.0510144     0.054167)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.47 using 59 PHA bins.
# Reduced chi-squared =         0.8679 for     57 degrees of freedom 
# Null hypothesis probability =   7.503888e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.286e-06   1.164e-07
25- 50  4.289e-06   2.210e-07
50-150  8.765e-06   1.893e-06
15-150  1.534e-05   2.065e-06

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.22943        (-0.580266      0.612479)
R1^2/D10^2  : 0.432279        (-0.107458      0.15471)
kT2 [keV]   : 26.9964        (-2.23633      2.82805)
R2^2/D10^2  : 4.35014E-03    (-0.00131439   0.00164952)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.80 using 59 PHA bins.
# Reduced chi-squared =         0.9600 for     55 degrees of freedom 
# Null hypothesis probability =   5.592079e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.170e-06   1.707e-07
25- 50  4.348e-06   1.837e-07
50-150  8.916e-06   6.241e-07
15-150  1.543e-05   6.977e-07

Peak spectrum fit

Power-law model

Time interval is from  210.440 sec. to  211.440 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.34395     ( -0.0903612   0.0906578 )
Norm@50keV  : 2.59702E-02    ( -0.00133643   0.00133336 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          70.56 using 59 PHA bins.
# Reduced chi-squared =          1.238 for     57 degrees of freedom 
# Null hypothesis probability =   1.070158e-01
 
Photon flux (15-150 keV)    in 1 sec: 3.12479 ( -0.161566  0.161673 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.53991e-07 ( -1.47615e-08  1.48346e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from  210.440 sec. to  211.440 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.22550     ( -0.344064   0.164665 )
Epeak [keV] : 343.668      ( -343.668 -343.668 )
Norm@50keV  : 2.96585E-02    ( -0.0048217   0.013437 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          70.17 using 59 PHA bins.
# Reduced chi-squared =          1.253 for     56 degrees of freedom 
# Null hypothesis probability =   9.639663e-02
 
Photon flux (15-150 keV)    in 1 sec: 3.10769 ( -0.16775  0.16522 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.52071e-07 ( -1.5878e-08  1.581e-08 ) ergs/cm2

Band function

Time interval is from  210.440 sec. to  211.440 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.134890   ( 0.791439   5.77503 )
beta        : -1.37405    ( 1.37027   0.107125 )
Epeak [keV] : 40.3564      ( -40.3073 267.476 )
Norm@50keV   : 0.195562    ( -0.201091   1705.13 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          69.87 using 59 PHA bins.
# Reduced chi-squared =          1.270 for     55 degrees of freedom 
# Null hypothesis probability =   8.542340e-02
 
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]    : 17.2232  (  )
R^2/D10^2   : 0.225758  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         166.74 using 59 PHA bins.
# Reduced chi-squared =         2.9252 for     57 degrees of freedom 
# Null hypothesis probability =   1.078111e-12
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.359e-08   1.455e-09
25- 50  6.075e-08   4.295e-09
50-150  1.292e-07   1.260e-08
15-150  2.035e-07   1.345e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (      )
Norm        : 12.7558       (-0.662823     0.662845)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          85.86 using 59 PHA bins.
# Reduced chi-squared =          1.506 for     57 degrees of freedom 
# Null hypothesis probability =   8.032076e-03
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.200e-08   1.850e-09
25- 50  6.155e-08   3.755e-09
50-150  1.350e-07   9.750e-09
15-150  2.285e-07   1.790e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.70080        (-1.05799      1.22933)
R1^2/D10^2  : 3.39864        (-1.47347      2.90953)
kT2 [keV]   : 28.2261        (-3.77479      5.59194)
R2^2/D10^2  : 3.63481E-02    (-0.0164705   0.023427)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.75 using 59 PHA bins.
# Reduced chi-squared =          1.232 for     55 degrees of freedom 
# Null hypothesis probability =   1.160821e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.808e-08   5.820e-09
25- 50  5.762e-08   8.540e-09
50-150  1.665e-07   2.685e-08
15-150  2.522e-07   4.090e-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: 1.62847     ( -0.21224   0.216533 )
Norm@50keV  : 1.37334E-03    ( -0.000174928   0.000173066 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.42 using 59 PHA bins.
# Reduced chi-squared =         0.9548 for     57 degrees of freedom 
# Null hypothesis probability =   5.722938e-01
 
Photon flux (15-150 keV)    in 142.2 sec: 0.178072 ( -0.0221173  0.0221642 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.82037e-06 ( -2.45147e-07  2.47694e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.41589     ( -0.961443   0.42036 )
Epeak [keV] : 133.976      ( -134.042 -134.042 )
Norm@50keV  : 1.77114E-03    ( -0.00131032   0.00373345 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.23 using 59 PHA bins.
# Reduced chi-squared =         0.9684 for     56 degrees of freedom 
# Null hypothesis probability =   5.420760e-01
 
Photon flux (15-150 keV)    in 142.2 sec: 0.176495 ( -0.023009  0.02286 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.79225e-06 ( -2.73593e-07  2.6708e-07 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.02742   ( 1.02048   1.02048 )
beta        : -1.78895    ( 1.7895   0.352255 )
Epeak [keV] : 64.8800      ( -63.8079 -63.8079 )
Norm@50keV   : 3.05570E-03    ( -0.00194607   0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.92 using 59 PHA bins.
# Reduced chi-squared =         0.9803 for     55 degrees of freedom 
# Null hypothesis probability =   5.159867e-01
 
Photon flux (15-150 keV)    in 142.2 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.78349e-06 ( 0  0 ) ergs/cm2

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

S(25-50 keV)  = 4.23e-06
S(50-100 keV) = 5.31e-06

T90 vs. Hardness ratio plot

T90                                   = 249.415999948978 sec.
Hardness ratio (energy fluence ratio) = 1.25532

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.2061
Count Ratio (50-100 keV) / (15-25 keV) = 0.834691

Mask shadow pattern

IMX = -8.830734206158953E-01, IMY = -3.210823008819084E-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:

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

Time interval of the image:
-70.099400 72.100590
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
164.6040  67.5319    1.2  43.2  160.0   2.7606   9.9 ------	UNKNOWN                       
224.4769  68.4620    2.1  44.2 -168.6   1.0187   5.4 ------	UNKNOWN                       
208.9218 -17.0861    2.9  47.4  -23.8   0.9375   4.0 ------	UNKNOWN                       
227.6408  -5.8971    3.1  47.0  -53.1   2.0315   3.7 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
144.100620 963.064900
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
100.3056  64.2813    3.7  25.3  172.2   1.3325   3.1 ------	UNKNOWN                       
164.6177  67.5279    0.2   0.0 -158.5  19.4882  48.2 ------	UNKNOWN                       
227.7389  25.3580    3.0  56.5  -16.6   6.3797   3.8 ------	UNKNOWN

Plot creation:
Sat May 30 23:03:43 EDT 2015