batgrbproduct analysis for trigger=111529

batgrbproduct Analysis for Trigger=111529

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 22:45:38 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger111529
======================================================================

  Trigger: 00111529      Segment: 000

  BAT Trigger Time: 132853476.608   [s; MET]
      Trigger Stop: 132853477.12   [s; MET]
               UTC: 2005-03-18T15:44:37.170860    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 49.6782870708762   Dec: -46.4033764015338  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9
     Image Trigger?:     NO
     Rate S/N Ratio:     16.8226038412607  [ if not an image trigger ]
     Image S/N Ratio:    9

  Flight Position:   [ source = BAT ]
    RA: 49.6782870708762   Dec: -46.4033764015338  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 49.697136532926   Dec: -46.3882537483467  [deg; J2000]  
        { 03h 18m 47.3s , -46d 23' 17.7" }
         +/- 0.988469430717399 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.38173242762334 [arcmin] (formal 1-sigma fit error)
    SNR: 30.9252876040921
 
  Angular difference between Flight and Ground position is 1.196535 arcmin
 
  Partial Coding Fraction: 0.6640625    [ including projection effects ]

  Duration
     T90: 16.1240000128746 +/- 10.9167885364736
        Measured from: 3.48000000417233
                   to: 19.6040000170469     [s; relative to TRIGTIME]
     T50: 8.64800000190735 +/- 1.64450600444055
        Measured from: 7.608000010252
                   to: 16.2560000121593     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 28.5799999982119     
                   to: 29.5799999982119     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.61999998986721     
                   to: 29.7160000056028     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.683020   0.852985   0.445466   0.058110
           0.030310   0.032034   0.028613   0.027508 [error]
 Peak      0.110891   0.158902   0.105551   0.017190
           0.006932   0.007650   0.006727   0.005242 [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 2.29e-07 3.32e-07 3.59e-07 7.23e-07 1.14e-06 1.64e-06   erg/cm2
              Error 1.73e-08 1.60e-08 2.78e-08 1.15e-07 6.38e-08 1.41e-07   erg/cm2
Peak flux Power-law 1.17e+00 1.08e+00 6.94e-01 6.84e-01 3.23e+00 3.63e+00   ph/cm2/s
              Error 1.08e-01 6.42e-02 5.47e-02 1.06e-01 1.89e-01 2.12e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.06e-07 3.61e-07 3.49e-07 2.02e-07 1.04e-06 1.12e-06   erg/cm2
              Error 2.01e-08 2.12e-08 3.23e-08 -------- 7.47e-08 1.38e-07   erg/cm2
Peak flux Cutoff-PL 1.03e+00 1.18e+00 7.24e-01 2.79e-01 3.13e+00 3.21e+00   ph/cm2/s
              Error 1.27e-01 8.11e-02 6.23e-02 1.23e-01 1.95e-01 2.29e-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    1.888    0.092    -      -           4.09e-03 2.30e-04   61.180 57
CPL   1.032    0.429      49.2    7.7      1.22e-02 7.12e-03   46.930 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.642    0.099    -      -           2.48e-02 1.53e-03   72.040 57
CPL   0.806    0.440      67.2   16.3      6.88e-02 3.89e-02   59.290 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: 10.496000 sec.
T50 in the 50-300 keV band: 5.888000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   30.336   -0.620   29.716
T90    16.124    3.480   19.604
T50     8.648    7.608   16.256
Peak    1.000   28.580   29.580

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
   49.6971   -46.3883   0.0062    22.2086   -78.8115         2.0703434     30.925 TRIG_00111529                 
 
Foreground time interval of the image:
 -0.620  29.716 (delta_t =  30.336 [sec])
Background time interval of the image:
-299.608  -0.620 (delta_t = 298.988 [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   -0.620 sec. to   29.716 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.88812     ( -0.0909042   0.0925067 )
Norm@50keV  : 4.09445E-03    ( -0.000230425   0.000228579 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.18 using 59 PHA bins.
# Reduced chi-squared =          1.073 for     57 degrees of freedom 
# Null hypothesis probability =   3.282111e-01
 
Photon flux (15-150 keV)    in 30.34 sec: 0.584655 ( -0.0287639  0.0287938 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.14201e-06 ( -6.35265e-08  6.41096e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.620 sec. to   29.716 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.03216     ( -0.451011   0.407449 )
Epeak [keV] : 49.2346      ( -5.90641 9.4415 )
Norm@50keV  : 1.21698E-02    ( -0.00485666   0.009379 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.93 using 59 PHA bins.
# Reduced chi-squared =         0.8380 for     56 degrees of freedom 
# Null hypothesis probability =   8.008275e-01
 
Photon flux (15-150 keV)    in 30.34 sec: 0.557858 ( -0.030965  0.031039 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.04442e-06 ( -7.35957e-08  7.5847e-08 ) ergs/cm2

Band function

Time interval is from   -0.620 sec. to   29.716 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.03193   ( -0.370381   0.433407 )
beta        : -10.0000    ( 10   1.77636e-15 )
Epeak [keV] : 49.2255      ( -5.9025 9.43185 )
Norm@50keV   : 1.21722E-02    ( -0.0048599   0.00938317 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.93 using 59 PHA bins.
# Reduced chi-squared =         0.8532 for     55 degrees of freedom 
# Null hypothesis probability =   7.723355e-01
 
Photon flux (15-150 keV)    in 30.34 sec: 0.558633 (    ) 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]    : 11.0085  (-0.629848  0.671565)
R^2/D10^2   : 0.187185  (-0.0377861   0.0471632)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         104.35 using 59 PHA bins.
# Reduced chi-squared =         1.8307 for     57 degrees of freedom 
# Null hypothesis probability =   1.320117e-04
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.438e-07   1.204e-08
25- 50  4.071e-07   2.078e-08
50-150  2.788e-07   3.606e-08
15-150  8.297e-07   4.688e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 80.6714       (-12.4901      16.4361)
Norm        : 2.72278       (-0.205426     0.22753)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.01 using 59 PHA bins.
# Reduced chi-squared =         0.8422 for     57 degrees of freedom 
# Null hypothesis probability =   7.961177e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.145e-07   1.478e-08
25- 50  3.538e-07   1.654e-08
50-150  5.022e-07   6.053e-08
15-150  1.070e-06   7.024e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.48931        (-1.01335      1.06518)
R1^2/D10^2  : 0.883055        (-0.334872      0.653487)
kT2 [keV]   : 19.3321        (-3.05249      4.66454)
R2^2/D10^2  : 1.50669E-02    (-0.00884715   0.0162106)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.46 using 59 PHA bins.
# Reduced chi-squared =         0.7901 for     55 degrees of freedom 
# Null hypothesis probability =   8.695011e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.997e-07   5.470e-08
25- 50  3.583e-07   7.788e-08
50-150  4.721e-07   2.088e-07
15-150  1.030e-06   2.966e-07

Peak spectrum fit

Power-law model

Time interval is from   28.580 sec. to   29.580 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.64235     ( -0.0978626   0.0992584 )
Norm@50keV  : 2.48139E-02    ( -0.00153675   0.00152783 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          72.04 using 59 PHA bins.
# Reduced chi-squared =          1.264 for     57 degrees of freedom 
# Null hypothesis probability =   8.656552e-02
 
Photon flux (15-150 keV)    in 1 sec: 3.23196 ( -0.188473  0.18858 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.30959e-07 ( -1.52161e-08  1.53242e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   28.580 sec. to   29.580 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.805755     ( -0.462061   0.418565 )
Epeak [keV] : 67.2495      ( -10.1553 22.4428 )
Norm@50keV  : 6.87665E-02    ( -0.0269682   0.0507474 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.29 using 59 PHA bins.
# Reduced chi-squared =          1.059 for     56 degrees of freedom 
# Null hypothesis probability =   3.564918e-01
 
Photon flux (15-150 keV)    in 1 sec: 3.12569 ( -0.19509  0.19517 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.16194e-07 ( -1.6615e-08  1.6838e-08 ) ergs/cm2

Band function

Time interval is from   28.580 sec. to   29.580 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.805706   ( -0.334712   0.535564 )
beta        : -10.0000    ( 10   1.06581e-13 )
Epeak [keV] : 67.2365      ( -8.7993 22.4386 )
Norm@50keV   : 6.87683E-02    ( -0.0269732   0.0508306 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.29 using 59 PHA bins.
# Reduced chi-squared =          1.078 for     55 degrees of freedom 
# Null hypothesis probability =   3.219727e-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]    : 13.2333  (-0.916496  0.98619)
R^2/D10^2   : 0.566471  (-0.129368   0.167264)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         105.29 using 59 PHA bins.
# Reduced chi-squared =         1.8472 for     57 degrees of freedom 
# Null hypothesis probability =   1.046514e-04
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.103e-08   2.250e-09
25- 50  7.382e-08   5.300e-09
50-150  8.258e-08   1.096e-08
15-150  1.774e-07   1.230e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 143.427       (      )
Norm        : 13.5160       (-0.876861     1.03626)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.70 using 59 PHA bins.
# Reduced chi-squared =          1.100 for     57 degrees of freedom 
# Null hypothesis probability =   2.812929e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.469e-08   2.955e-09
25- 50  6.394e-08   7.350e-09
50-150  1.242e-07   4.139e-08
15-150  2.228e-07   5.035e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.66038        (-1.23547      1.41651)
R1^2/D10^2  : 3.82134        (-1.72783      3.80248)
kT2 [keV]   : 20.9562        (-3.09331      4.85785)
R2^2/D10^2  : 8.08031E-02    (-0.0461167   0.0747997)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.16 using 59 PHA bins.
# Reduced chi-squared =          1.021 for     55 degrees of freedom 
# Null hypothesis probability =   4.313107e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.250e-08   8.580e-09
25- 50  6.645e-08   1.342e-08
50-150  1.172e-07   3.494e-08
15-150  2.161e-07   5.795e-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: 1.88812     ( -0.0909042   0.0925067 )
Norm@50keV  : 4.09445E-03    ( -0.000230425   0.000228579 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.18 using 59 PHA bins.
# Reduced chi-squared =          1.073 for     57 degrees of freedom 
# Null hypothesis probability =   3.282111e-01
 
Photon flux (15-150 keV)    in 30.34 sec: 0.584655 ( -0.0287639  0.0287938 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.14201e-06 ( -6.35265e-08  6.41096e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.03216     ( -0.451011   0.407449 )
Epeak [keV] : 49.2346      ( -5.90641 9.4415 )
Norm@50keV  : 1.21698E-02    ( -0.00485666   0.009379 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.93 using 59 PHA bins.
# Reduced chi-squared =         0.8380 for     56 degrees of freedom 
# Null hypothesis probability =   8.008275e-01
 
Photon flux (15-150 keV)    in 30.34 sec: 0.557858 ( -0.030965  0.031039 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.04442e-06 ( -7.35957e-08  7.5847e-08 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.03193   ( -0.370381   0.433407 )
beta        : -10.0000    ( 10   5.32907e-15 )
Epeak [keV] : 49.2255      ( -5.9025 9.43185 )
Norm@50keV   : 1.21722E-02    ( -0.0048599   0.00938317 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.93 using 59 PHA bins.
# Reduced chi-squared =         0.8532 for     55 degrees of freedom 
# Null hypothesis probability =   7.723355e-01
 
Photon flux (15-150 keV)    in 30.34 sec: 0.558633 (    ) 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)  = 3.32e-07
S(50-100 keV) = 3.59e-07

T90 vs. Hardness ratio plot

T90                                   = 16.1240000128746 sec.
Hardness ratio (energy fluence ratio) = 1.08133

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.24884
Count Ratio (50-100 keV) / (15-25 keV) = 0.652201

Mask shadow pattern

IMX = 7.921960456349829E-02, IMY = 4.005086390093962E-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:
-299.608000 -0.620000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.5424 -40.5595    0.9  38.1   81.6   7.5343  12.6    0.7	Vela X-1                      
170.3066 -60.6232   34.1  42.1  127.3   0.2147   0.3    0.3	Cen X-3                       
186.5540 -62.7816    2.4  46.5  136.8   3.7866   4.8    2.9	GX 301-2                      
 63.8756 -12.6890    2.3  47.0  -29.3   1.8503   5.1 ------	UNKNOWN

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

Time interval of the image:
-0.620000 29.716000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.5420 -40.5869    5.6  38.1   81.6  -0.3632  -2.1    2.0	Vela X-1                      
170.0651 -60.5847   17.0  42.1  127.1  -0.1256  -0.7    7.7	Cen X-3                       
186.7491 -62.7819   27.6  46.6  136.9   0.0974   0.4    2.6	GX 301-2                      
 49.6972 -46.3883    0.4  22.2  -78.8   2.0700  30.9 ------	UNKNOWN                       
 41.9572 -41.8623    2.0  29.3  -80.3   0.4443   5.7 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:

Plot creation:
Sun May 31 17:19:35 EDT 2015