batgrbproduct analysis for trigger=153514

batgrbproduct Analysis for Trigger=153514

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 20:27:49 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger153514
======================================================================

  Trigger: 00153514      Segment: 000

  BAT Trigger Time: 147491504   [s; MET]
      Trigger Stop: 147491568   [s; MET]
               UTC: 2005-09-04T01:51:44.290000    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 13.67015365989   Dec: 14.1381730057214  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    13.26
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    13.26

  Flight Position:   [ source = BAT ]
    RA: 13.67015365989   Dec: 14.1381730057214  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 13.7157652137441   Dec: 14.075392814314  [deg; J2000]  
        { 00h 54m 51.8s , +14d 04' 31.4" }
         +/- 1.33850511717752 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.539188828709435 [arcmin] (formal 1-sigma fit error)
    SNR: 20.0554593947411
 
  Angular difference between Flight and Ground position is 4.607977 arcmin
 
  Partial Coding Fraction: 0.5703125    [ including projection effects ]

  Duration
     T90: 181.576000005007 +/- 16.3062554673326
        Measured from: 15.2120000123978
                   to: 196.788000017405     [s; relative to TRIGTIME]
     T50: 88.027999997139 +/- 10.9211036186879
        Measured from: 60.9399999976158
                   to: 148.967999994755     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 27.4399999976158     
                   to: 28.4399999976158     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -13.5160000026226     
                   to: 216.956000000238     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.788991   2.640542   2.517093   0.859196
           0.085057   0.089311   0.080507   0.072677 [error]
 Peak      0.014648   0.029444   0.027253   0.012689
           0.006622   0.006960   0.006522   0.005894 [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 5.15e-07 1.12e-06 1.90e-06 7.43e-06 5.21e-06 1.10e-05   erg/cm2
              Error 3.78e-08 4.75e-08 7.92e-08 7.24e-07 2.00e-07 7.63e-07   erg/cm2
Peak flux Power-law 1.72e-01 2.02e-01 1.71e-01 2.46e-01 6.33e-01 7.91e-01   ph/cm2/s
              Error 8.07e-02 5.98e-02 5.10e-02 1.54e-01 1.67e-01 2.14e-01   ph/cm2/s
 
Fluence   Cutoff-PL 5.03e-07 1.12e-06 1.92e-06 6.45e-06 5.18e-06 9.99e-06   erg/cm2
              Error 4.63e-08 5.04e-08 8.93e-08 1.34e-06 2.16e-07 1.73e-06   erg/cm2
Peak flux Cutoff-PL 1.32e-01 2.33e-01 1.85e-01 5.62e-02 5.93e-01 6.05e-01   ph/cm2/s
              Error 9.77e-02 8.12e-02 6.68e-02 1.15e-01 1.78e-01 2.66e-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    1.233    0.066    -      -           2.25e-03 7.98e-05   55.310 57
CPL   1.134    0.190     485.2    0.0      2.49e-03 5.70e-04   54.810 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.239    0.437    -      -           5.36e-03 1.38e-03   50.550 57
CPL  -0.297    2.438      72.5  -16.8      3.28e-02 3.26e+00   49.310 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: 188.352000 sec.
T50 in the 50-300 keV band: 87.168000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  230.472  -13.516  216.956
T90   181.576   15.212  196.788
T50    88.028   60.940  148.968
Peak    1.000   27.440   28.440

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
   13.7158    14.0754   0.0096    35.0872    13.4001         2.5233754     20.055 TRIG_00153514                 
 
Foreground time interval of the image:
 -2.099  74.301 (delta_t =  76.400 [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)

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  -13.516 sec. to  216.956 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.23274     ( -0.0662291   0.0657686 )
Norm@50keV  : 2.24719E-03    ( -7.9824e-05   7.97929e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.31 using 59 PHA bins.
# Reduced chi-squared =         0.9703 for     57 degrees of freedom 
# Null hypothesis probability =   5.388897e-01
 
Photon flux (15-150 keV)    in 230.5 sec: 0.265054 ( -0.0099868  0.0100062 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.20778e-06 ( -2.0002e-07  2.00522e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -13.516 sec. to  216.956 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.13385     ( -0.251092   0.128835 )
Epeak [keV] : 485.199      ( -485.209 -485.209 )
Norm@50keV  : 2.49447E-03    ( -0.000411199   0.00072879 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.81 using 59 PHA bins.
# Reduced chi-squared =         0.9788 for     56 degrees of freedom 
# Null hypothesis probability =   5.199533e-01
 
Photon flux (15-150 keV)    in 230.5 sec: 0.263502 ( -0.010618  0.010355 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.17643e-06 ( -2.17131e-07  2.14088e-07 ) ergs/cm2

Band function

Time interval is from  -13.516 sec. to  216.956 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.99824   ( -14.9917   -4.99824 )
beta        : -1.28415    ( -0.0778606   0.0723913 )
Epeak [keV] : 25.8264      ( -3.72766 2.81784 )
Norm@50keV   : 152.665    ( -5.39664   240.796 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.79 using 59 PHA bins.
# Reduced chi-squared =         0.8872 for     55 degrees of freedom 
# Null hypothesis probability =   7.093134e-01
 
Photon flux (15-150 keV)    in 230.5 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]    : 19.4718  (  )
R^2/D10^2   : 1.28256E-02  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         216.92 using 59 PHA bins.
# Reduced chi-squared =         3.8056 for     57 degrees of freedom 
# Null hypothesis probability =   1.711369e-20
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.183e-07   1.608e-08
25- 50  1.068e-06   5.981e-08
50-150  2.990e-06   1.821e-07
15-150  4.276e-06   1.856e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (      )
Norm        : 1.11597       (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         125.32 using 59 PHA bins.
# Reduced chi-squared =         2.1986 for     57 degrees of freedom 
# Null hypothesis probability =   4.873190e-07
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.405e-07   2.524e-08
25- 50  1.232e-06   4.783e-08
50-150  2.702e-06   1.060e-07
15-150  4.575e-06   1.683e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.67631        (-0.939828      1.0727)
R1^2/D10^2  : 0.173667        (-0.0600628      0.0971704)
kT2 [keV]   : 32.4623        (-3.81226      5.50388)
R2^2/D10^2  : 2.07027E-03    (-0.000808358   0.00105779)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.56 using 59 PHA bins.
# Reduced chi-squared =         0.9193 for     55 degrees of freedom 
# Null hypothesis probability =   6.447138e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.878e-07   6.062e-08
25- 50  1.148e-06   9.704e-08
50-150  3.577e-06   4.034e-07
15-150  5.213e-06   4.990e-07

Peak spectrum fit

Power-law model

Time interval is from   27.440 sec. to   28.440 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.23922     ( -0.445951   0.428356 )
Norm@50keV  : 5.36306E-03    ( -0.00138334   0.00138204 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.55 using 59 PHA bins.
# Reduced chi-squared =         0.8868 for     57 degrees of freedom 
# Null hypothesis probability =   7.141369e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.633215 ( -0.166987  0.167868 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.38252e-08 ( -1.50918e-08  1.54404e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   27.440 sec. to   28.440 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.296824     ( -2.31866   2.55677 )
Epeak [keV] : 72.4788      ( -38.5023 -72.0082 )
Norm@50keV  : 3.28447E-02    ( -0.0340321   6.48723 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.31 using 59 PHA bins.
# Reduced chi-squared =         0.8806 for     56 degrees of freedom 
# Null hypothesis probability =   7.241132e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.593380 ( -0.176549  0.180175 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.66761e-08 ( -1.70471e-08  1.90193e-08 ) ergs/cm2

Band function

Time interval is from   27.440 sec. to   28.440 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 1.28885   ( -4.51041   -4.51041 )
beta        : -2.02556    ( -3.50297   0.713131 )
Epeak [keV] : 57.1710      ( -37.5356 93.283 )
Norm@50keV   : 0.122821    ( -0.130468   19.4825 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.45 using 59 PHA bins.
# Reduced chi-squared =         0.8808 for     55 degrees of freedom 
# Null hypothesis probability =   7.214860e-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]    : 15.7172  (-3.8192  5.83519)
R^2/D10^2   : 6.66603E-02  (-0.0442383   0.107463)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.71 using 59 PHA bins.
# Reduced chi-squared =         0.8722 for     57 degrees of freedom 
# Null hypothesis probability =   7.423595e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.418e-09   1.863e-09
25- 50  1.416e-08   7.714e-09
50-150  2.428e-08   1.542e-08
15-150  4.186e-08   1.783e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (-101.519      -199.363)
Norm        : 2.63516       (-0.686458     0.686458)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.44 using 59 PHA bins.
# Reduced chi-squared =         0.9025 for     57 degrees of freedom 
# Null hypothesis probability =   6.827980e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.562e-09   4.050e-09
25- 50  1.262e-08   7.485e-09
50-150  2.768e-08   1.685e-08
15-150  4.687e-08   2.864e-08

Double BB

------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 12.7889        (-12.736      5.98503)
R1^2/D10^2  : 0.115576        (-0.114354      0.295115)
kT2 [keV]   : 200.000        (      )
R2^2/D10^2  : 7.10493E-05    (-7.10283e-05   -7.10283e-05)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.81 using 59 PHA bins.
#Fit statistic : Chi-Squared =          47.64 using 59 PHA bins.
# Reduced chi-squared =         0.8693 for     55 degrees of freedom 
# Reduced chi-squared =         0.8663 for     55 degrees of freedom 
# Null hypothesis probability =   7.432232e-01
# Null hypothesis probability =   7.488779e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.060e-09   2.487e-09
25- 50  1.426e-08   9.560e-09
50-150  3.286e-08   1.813e-08
15-150  5.118e-08   2.783e-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: 1.24920     ( -0.145772   0.14348 )
Norm@50keV  : 1.94214E-03    ( -0.000155881   0.000155876 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          68.81 using 59 PHA bins.
# Reduced chi-squared =          1.207 for     57 degrees of freedom 
# Null hypothesis probability =   1.358943e-01
 
Photon flux (15-150 keV)    in 76.4 sec: 0.229673 ( -0.019253  0.0193093 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.48527e-06 ( -1.30769e-07  1.3151e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.23443     ( -0.495209   0.145386 )
Epeak [keV] : 9945.65      ( -9999.36 -9999.36 )
Norm@50keV  : 1.97329E-03    ( -0.000156547   0.000186082 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          68.88 using 59 PHA bins.
# Reduced chi-squared =          1.230 for     56 degrees of freedom 
# Null hypothesis probability =   1.157635e-01
 
Photon flux (15-150 keV)    in 76.4 sec: 0.229689 ( -0.019635  0.019199 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.48514e-06 ( -1.35832e-07  1.30957e-07 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.99611   ( -4.64704   -4.99611 )
beta        : -1.35474    ( -0.181773   0.166838 )
Epeak [keV] : 26.6460      ( -5.24501 4.17216 )
Norm@50keV   : 115.317    ( -9.20029   317.447 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          63.85 using 59 PHA bins.
# Reduced chi-squared =          1.161 for     55 degrees of freedom 
# Null hypothesis probability =   1.935813e-01
 
Photon flux (15-150 keV)    in 76.4 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)  = 1.12e-06
S(50-100 keV) = 1.90e-06

T90 vs. Hardness ratio plot

T90                                   = 181.576000005007 sec.
Hardness ratio (energy fluence ratio) = 1.69643

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.476
Count Ratio (50-100 keV) / (15-25 keV) = 1.40699

Mask shadow pattern

IMX = 6.833533355773687E-01, IMY = -1.627988033229366E-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:
-2.099400 74.300600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
288.7955  10.8728    2.8  47.6 -172.9   0.6872   4.2    4.4	GRS 1915+105                  
299.5854  35.2000    0.7  36.8 -136.7   2.3163  17.4    0.3	Cyg X-1                       
308.2152  40.9710    2.9  32.8 -122.7   0.5350   4.0    4.9	Cyg X-3                       
326.3915  38.2172    0.0  21.0 -104.7   0.2653   2.5   12.1	Cyg X-2                       
 13.7161  14.0749    0.6  35.1   13.4   2.5524  20.3 ------	UNKNOWN                       
 36.4604  15.8808    2.6  56.1    3.8   2.0484   4.4 ------	UNKNOWN                       
 37.8899  45.0399    3.4  55.6  -31.7   1.5633   3.4 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
148.500600 303.075500
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
326.2902  38.1973    3.4  48.2  162.3   1.1709   3.4    9.3	Cyg X-2                       
 13.7231  14.0769    0.4   0.1  -52.5   3.2787  26.0 ------	UNKNOWN                       
343.8673  63.9474    2.4  54.0 -162.5   1.6834   4.8 ------	UNKNOWN                       
 61.8225   4.4621    3.2  48.4  -50.2   2.2575   3.6 ------	UNKNOWN                       
 38.2510  59.0498    2.7  48.5 -130.2   2.5322   4.3 ------	UNKNOWN

Plot creation:
Sun May 31 15:46:31 EDT 2015