batgrbproduct analysis for trigger=540178

batgrbproduct Analysis for Trigger=540178

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 12 23:10:26 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger540178
======================================================================

  Trigger: 00540178      Segment: 000

  BAT Trigger Time: 376057552   [s; MET]
      Trigger Stop: 376057616   [s; MET]
               UTC: 2012-12-01T12:25:42.064740    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 13.4879874034949   Dec: -42.9520058447332  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9.28
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    9.28

  Flight Position:   [ source = BAT ]
    RA: 13.4879874034949   Dec: -42.9520058447332  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 13.4957664996339   Dec: -42.934956596233  [deg; J2000]  
        { 00h 53m 59.0s , -42d 56' 05.8" }
         +/- 1.59695376852788 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.562566729973271 [arcmin] (formal 1-sigma fit error)
    SNR: 15.5847825220581
 
  Angular difference between Flight and Ground position is 1.078506 arcmin
 
  Partial Coding Fraction: 1    [ including projection effects ]

  Duration
     T90: 38 +/- 8.24621125123532
        Measured from: -23
                   to: 15     [s; relative to TRIGTIME]
     T50: 20 +/- 4.12310562561766
        Measured from: -17
                   to: 3     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -9     
                   to: -8     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -24     
                   to: 22     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.496686   0.529114   0.283573   0.089508
           0.038067   0.039028   0.034503   0.030680 [error]
 Peak      0.031119   0.040714   0.025184   0.008966
           0.005960   0.006368   0.005590   0.004736 [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 1.41e-07 2.08e-07 2.28e-07 4.69e-07 7.20e-07 1.05e-06   erg/cm2
              Error 1.80e-08 1.75e-08 3.30e-08 1.38e-07 7.48e-08 1.71e-07   erg/cm2
Peak flux Power-law 2.73e-01 2.66e-01 1.81e-01 1.93e-01 7.98e-01 9.13e-01   ph/cm2/s
              Error 7.63e-02 4.77e-02 4.48e-02 9.55e-02 1.40e-01 1.68e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.41e-07 2.09e-07 2.28e-07 4.28e-07 7.16e-07 1.00e-06   erg/cm2
              Error 1.92e-08 2.07e-08 3.36e-08 2.62e-07 8.39e-08 2.61e-07   erg/cm2
Peak flux Cutoff-PL 2.61e-01 2.76e-01 1.85e-01 1.30e-01 7.89e-01 8.52e-01   ph/cm2/s
              Error 8.94e-02 5.91e-02 4.92e-02 1.45e-01 1.44e-01 2.03e-01   ph/cm2/s
 
Fluence        Band -------- -------- -------- -------- -------- --------   erg/cm2
              Error -------- -------- -------- -------- -------- --------   erg/cm2
Peak flux      Band -------- -------- -------- 1.32e-01 -------- 8.54e-01   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    1.866    0.166    -      -           1.70e-03 1.76e-04   51.570 57
CPL   1.819    0.621     162.7   -0.0      1.81e-03 1.63e-03   51.560 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.557    0.312    -      -           6.29e-03 1.21e-03   69.320 57
CPL   1.237    1.376     115.2    0.0      9.26e-03 2.92e-02   69.130 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: 23.744000 sec.
T50 in the 50-300 keV band: 13.248000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   46.000  -24.000   22.000
T90    38.000  -23.000   15.000
T50    20.000  -17.000    3.000
Peak    1.000   -9.000   -8.000

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
   13.4958   -42.9350   0.0124     4.2649    -8.1036         0.9970423     15.585 TRIG_00540178                 
 
Foreground time interval of the image:
-13.299  22.000 (delta_t =  35.299 [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

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000

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 64.000000

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 64.000000

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  -24.000 sec. to   22.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.86642     ( -0.162708   0.168672 )
Norm@50keV  : 1.70166E-03    ( -0.000177826   0.000174193 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.57 using 59 PHA bins.
# Reduced chi-squared =         0.9048 for     57 degrees of freedom 
# Null hypothesis probability =   6.780370e-01
 
Photon flux (15-150 keV)    in 46 sec: 0.240799 ( -0.02032  0.0203276 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.19624e-07 ( -7.40586e-08  7.54966e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from  -24.000 sec. to   22.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.81885     ( -0.662252   0.579862 )
Epeak [keV] : 162.659      ( -192.185 -192.239 )
Norm@50keV  : 1.81042E-03    ( -0.000852021   0.00240337 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.56 using 59 PHA bins.
# Reduced chi-squared =         0.9208 for     56 degrees of freedom 
# Null hypothesis probability =   6.433047e-01
 
Photon flux (15-150 keV)    in 46 sec: 0.240244 ( -0.010745  0.020741 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.16133e-07 ( -8.97506e-08  7.81402e-08 ) ergs/cm2

Band function

Time interval is from  -24.000 sec. to   22.000 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.46003   ( 1.46164   6.43705 )
beta        : -1.92986    ( 1.92532   0.217189 )
Epeak [keV] : 42.8705      ( -43.2739 -43.2739 )
Norm@50keV   : 3.14387E-03    ( -0.00139882   0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.43 using 59 PHA bins.
# Reduced chi-squared =         0.9351 for     55 degrees of freedom 
# Null hypothesis probability =   6.119065e-01
 
Photon flux (15-150 keV)    in 46 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]    : 10.4225  (-1.11852  1.28276)
R^2/D10^2   : 9.34573E-02  (-0.032937   0.0501405)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          87.33 using 59 PHA bins.
# Reduced chi-squared =          1.532 for     57 degrees of freedom 
# Null hypothesis probability =   6.005699e-03
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.633e-08   1.509e-08
25- 50  2.537e-07   2.797e-08
50-150  1.490e-07   3.512e-08
15-150  4.991e-07   5.322e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 86.6743       (-23.8621      41.3288)
Norm        : 1.09424       (-0.135017     0.164892)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.33 using 59 PHA bins.
# Reduced chi-squared =         0.9356 for     57 degrees of freedom 
# Null hypothesis probability =   6.134898e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.312e-07   1.764e-08
25- 50  2.200e-07   2.275e-08
50-150  3.272e-07   1.404e-07
15-150  6.784e-07   1.323e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.99464        (-1.57296      1.68266)
R1^2/D10^2  : 0.549147        (-0.310288      1.15976)
kT2 [keV]   : 22.7087        (-6.51349      16.0947)
R2^2/D10^2  : 3.82760E-03    (-0.00314109   0.0102287)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.78 using 59 PHA bins.
# Reduced chi-squared =         0.9779 for     55 degrees of freedom 
# Null hypothesis probability =   5.212082e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.370e-07   5.094e-08
25- 50  2.091e-07   6.021e-08
50-150  3.546e-07   1.851e-07
15-150  7.006e-07   2.468e-07

Peak spectrum fit

Power-law model

Time interval is from   -9.000 sec. to   -8.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.55714     ( -0.30392   0.320078 )
Norm@50keV  : 6.29004E-03    ( -0.00122169   0.00119008 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          69.32 using 59 PHA bins.
# Reduced chi-squared =          1.216 for     57 degrees of freedom 
# Null hypothesis probability =   1.268519e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.797936 ( -0.140249  0.140291 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.91562e-08 ( -1.23703e-08  1.26542e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -9.000 sec. to   -8.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.23740     ( -1.55294   1.19829 )
Epeak [keV] : 115.217      ( -115.202 -115.202 )
Norm@50keV  : 9.26459E-03    ( -0.00926549   0.0492035 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          69.13 using 59 PHA bins.
# Reduced chi-squared =          1.234 for     56 degrees of freedom 
# Null hypothesis probability =   1.118368e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.789386 ( -0.144868  0.142561 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.7764e-08 ( -1.32033e-08  1.08407e-08 ) ergs/cm2

Band function

Time interval is from   -9.000 sec. to   -8.000 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.21720   ( 1.06204   1.06204 )
beta        : -4.94335    ( 3.58981   13.5898 )
Epeak [keV] : 108.941      ( -108.941 -108.941 )
Norm@50keV   : 9.55459E-03    ( -0.0041591   0.00556933 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          69.13 using 59 PHA bins.
# Reduced chi-squared =          1.257 for     55 degrees of freedom 
# Null hypothesis probability =   9.528221e-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]    : 14.0358  (-2.69746  3.45206)
R^2/D10^2   : 0.115607  (-0.0624146   0.128239)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          75.35 using 59 PHA bins.
# Reduced chi-squared =          1.322 for     57 degrees of freedom 
# Null hypothesis probability =   5.224127e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.810e-09   1.565e-09
25- 50  1.793e-08   4.675e-09
50-150  2.329e-08   8.840e-09
15-150  4.604e-08   1.337e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 198.538       (-113.333      -198.448)
Norm        : 3.26020       (-0.572279     0.663273)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          69.15 using 59 PHA bins.
# Reduced chi-squared =          1.213 for     57 degrees of freedom 
# Null hypothesis probability =   1.298169e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.123e-09   4.733e-09
25- 50  1.562e-08   8.865e-09
50-150  3.421e-08   1.915e-08
15-150  5.795e-08   3.244e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 2.50996        (-1.82745      3.67877)
R1^2/D10^2  : 78.2437        (-77.5873      1.94379e+08)
kT2 [keV]   : 16.5390        (-3.66659      6.98823)
R2^2/D10^2  : 6.04406E-02    (-0.0452411   0.0660291)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          68.05 using 59 PHA bins.
# Reduced chi-squared =          1.237 for     55 degrees of freedom 
# Null hypothesis probability =   1.111839e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.809e-09   3.435e-09
25- 50  1.501e-08   6.798e-09
50-150  2.840e-08   1.358e-08
15-150  5.121e-08   1.979e-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: 2.03841     ( -0.198958   0.210815 )
Norm@50keV  : 1.47712E-03    ( -0.000207396   0.000202482 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.22 using 59 PHA bins.
# Reduced chi-squared =         0.9864 for     57 degrees of freedom 
# Null hypothesis probability =   5.042094e-01
 
Photon flux (15-150 keV)    in 35.3 sec: 0.225574 ( -0.022868  0.0228684 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.81979e-07 ( -6.14305e-08  6.32156e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.78228     ( -0.942494   0.330137 )
Epeak [keV] : 33.9236      (   )
Norm@50keV  : 2.09876E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.92 using 59 PHA bins.
# Reduced chi-squared =         0.9986 for     56 degrees of freedom 
# Null hypothesis probability =   4.778295e-01
 
Photon flux (15-150 keV)    in 35.3 sec: 0.223072 ( -0.024038  0.023923 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.66377e-07 ( -7.50796e-08  7.52419e-08 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.50427   ( 1.50526   1.50526 )
beta        : -2.21554    ( 2.22504   0.365824 )
Epeak [keV] : 32.1338      ( -32.5047 -32.5047 )
Norm@50keV   : 3.23672E-03    ( -0.00178733   624.777 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.70 using 59 PHA bins.
# Reduced chi-squared =          1.013 for     55 degrees of freedom 
# Null hypothesis probability =   4.481505e-01
 
Photon flux (15-150 keV)    in 35.3 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.6746e-07 ( 0  0 ) ergs/cm2

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

S(25-50 keV)  = 2.08e-07
S(50-100 keV) = 2.28e-07

T90 vs. Hardness ratio plot

T90                                   = 38 sec.
Hardness ratio (energy fluence ratio) = 1.09615

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.06529
Count Ratio (50-100 keV) / (15-25 keV) = 0.57093

Mask shadow pattern

IMX = 7.382999173426451E-02, IMY = 1.051230636761357E-02

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000

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:
-13.299410 22.000000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
358.2150   6.7825    2.5  55.6   12.9   1.8500   4.5  420.7	UNKNOWN                       
 13.4958 -42.9350    0.7   4.3   -8.1   0.9966  15.6 ------	UNKNOWN                       
 77.5932 -75.6707    3.2  38.4 -163.7   0.3195   3.6 ------	UNKNOWN                       
297.5637 -71.0213    2.0  44.0 -116.1   1.6617   5.9 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
98.100590 783.134500
841.000000 963.045000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 46.3074 -39.0197    2.7  24.9  132.6   2.4767   4.3 ------	UNKNOWN                       
 93.9648 -60.6710    2.8  49.2 -179.2   4.7527   4.1 ------	UNKNOWN                       
328.6000  -7.1483    2.8  53.2  -20.6   5.4168   4.1 ------	UNKNOWN                       
326.2264 -17.3049    3.8  47.4  -31.9   3.0920   3.0 ------	UNKNOWN                       
136.5981 -72.5642    3.4  58.0 -156.8  12.8993   3.4 ------	UNKNOWN                       
322.4760  -4.8042    3.9  58.9  -24.3  11.9153   3.0 ------	UNKNOWN                       
164.1372 -80.6959    6.7  55.3 -145.1   7.4174   1.8 ------	UNKNOWN                       
302.4707 -73.0039    4.1  43.8 -116.1   6.4404   2.8 ------	UNKNOWN

Plot creation:
Sat May 30 17:48:25 EDT 2015