batgrbproduct analysis for trigger=180151

batgrbproduct Analysis for Trigger=180151

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 18:42:02 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger180151
======================================================================

  Trigger: 00180151      Segment: 000

  BAT Trigger Time: 160703736   [s; MET]
      Trigger Stop: 160703816   [s; MET]
               UTC: 2006-02-03T23:55:35.005260    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 103.51409528059   Dec: 71.8235796171824  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.16
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    8.16

  Flight Position:   [ source = BAT ]
    RA: 103.51409528059   Dec: 71.8235796171824  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 103.444578971282   Dec: 71.8402426505928  [deg; J2000]  
        { 06h 53m 46.7s , +71d 50' 24.9" }
         +/- 1.93771969723509 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.956190567123668 [arcmin] (formal 1-sigma fit error)
    SNR: 11.8223205732805
 
  Angular difference between Flight and Ground position is 1.640413 arcmin
 
  Partial Coding Fraction: 0.5078125    [ including projection effects ]

  Duration
     T90: 69.5240000188351 +/- 11.6385608860808
        Measured from: -18.0040000081062
                   to: 51.5200000107288     [s; relative to TRIGTIME]
     T50: 31.772000014782 +/- 11.9828681167701
        Measured from: -3.25200000405312
                   to: 28.5200000107288     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 25.919999986887     
                   to: 26.919999986887     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -22.1680000126362     
                   to: 55.7360000014305     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.387158   0.468165   0.427117   0.166186
           0.061980   0.064218   0.055188   0.046888 [error]
 Peak      0.011803   0.030180   0.019191   0.006762
           0.007252   0.007455   0.006224   0.005314 [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 1.37e-07 2.36e-07 3.12e-07 8.36e-07 9.12e-07 1.52e-06   erg/cm2
              Error 3.04e-08 3.22e-08 5.39e-08 3.11e-07 1.30e-07 3.52e-07   erg/cm2
Peak flux Power-law 1.75e-01 1.87e-01 1.42e-01 1.75e-01 5.70e-01 6.79e-01   ph/cm2/s
              Error 9.43e-02 6.58e-02 4.76e-02 1.18e-01 1.84e-01 2.06e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.34e-07 2.40e-07 3.15e-07 6.87e-07 9.05e-07 1.35e-06   erg/cm2
              Error 3.45e-08 3.80e-08 5.74e-08 5.13e-07 1.39e-07 5.12e-07   erg/cm2
Peak flux Cutoff-PL 1.33e-01 2.29e-01 1.56e-01 3.23e-02 5.46e-01 5.51e-01   ph/cm2/s
              Error 1.00e-01 9.33e-02 7.03e-02 9.95e-02 1.84e-01 2.14e-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    1.601    0.229    -      -           1.25e-03 1.67e-04   58.030 57
CPL   1.467    0.732     197.9    0.0      1.46e-03 0.00e+00   57.980 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.398    0.484    -      -           4.69e-03 1.42e-03   59.570 57
CPL  -0.498    3.266      62.1  -20.5      4.72e-02 8.04e+00   57.720 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: 81.152000 sec.
T50 in the 50-300 keV band: 40.384000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   77.904  -22.168   55.736
T90    69.524  -18.004   51.520
T50    31.772   -3.252   28.520
Peak    1.000   25.920   26.920

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
  103.4446    71.8402   0.0163    43.1515  -167.9841         1.5008103     11.822 TRIG_00180151                 
 
Foreground time interval of the image:
-22.168  55.736 (delta_t =  77.904 [sec])
Background time interval of the image:
-299.000 -22.168 (delta_t = 276.832 [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 80.000000

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 80.000000

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 80.000000

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  -22.168 sec. to   55.736 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.60138     ( -0.227555   0.231438 )
Norm@50keV  : 1.25153E-03    ( -0.00016753   0.000166127 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.03 using 59 PHA bins.
# Reduced chi-squared =          1.018 for     57 degrees of freedom 
# Null hypothesis probability =   4.370189e-01
 
Photon flux (15-150 keV)    in 77.9 sec: 0.160896 ( -0.0215995  0.0216851 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.11625e-07 ( -1.29315e-07  1.30369e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -22.168 sec. to   55.736 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.46749     ( -1.10749   0.35692 )
Epeak [keV] : 197.934      ( -210.897 -210.897 )
Norm@50keV  : 1.46181E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.98 using 59 PHA bins.
# Reduced chi-squared =          1.035 for     56 degrees of freedom 
# Null hypothesis probability =   4.020507e-01
 
Photon flux (15-150 keV)    in 77.9 sec: 0.160030 ( -0.022633  0.022269 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.04972e-07 ( -1.41914e-07  1.35507e-07 ) ergs/cm2

Band function

Time interval is from  -22.168 sec. to   55.736 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.27712   ( 1.17687   6.17376 )
beta        : -1.79971    ( 1.79621   0.414075 )
Epeak [keV] : 105.156      ( -95.1377 -95.1377 )
Norm@50keV   : 1.85290E-03    ( -0.00076184   0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.82 using 59 PHA bins.
# Reduced chi-squared =          1.051 for     55 degrees of freedom 
# Null hypothesis probability =   3.715725e-01
 
Photon flux (15-150 keV)    in 77.9 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]    : 14.7184  (-2.04607  2.45764)
R^2/D10^2   : 1.91929E-02  (-0.00824637   0.0137824)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          70.17 using 59 PHA bins.
# Reduced chi-squared =          1.231 for     57 degrees of freedom 
# Null hypothesis probability =   1.130117e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.801e-08   1.652e-08
25- 50  2.655e-07   4.760e-08
50-150  3.881e-07   9.726e-08
15-150  7.216e-07   1.211e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 191.183       (-85.1797      -185.407)
Norm        : 0.652116       (-0.0873674     0.113726)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.12 using 59 PHA bins.
# Reduced chi-squared =          1.020 for     57 degrees of freedom 
# Null hypothesis probability =   4.338145e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.272e-07   7.124e-08
25- 50  2.434e-07   1.315e-07
50-150  5.264e-07   2.896e-07
15-150  8.970e-07   4.880e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 3.80579        (-1.67997      2.56919)
R1^2/D10^2  : 1.76841        (-1.57299      52.7534)
kT2 [keV]   : 18.1284        (-3.2873      5.68371)
R2^2/D10^2  : 8.16377E-03    (-0.00530753   0.00587286)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.20 using 59 PHA bins.
# Reduced chi-squared =          1.058 for     55 degrees of freedom 
# Null hypothesis probability =   3.585128e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.397e-07   6.956e-08
25- 50  2.247e-07   7.525e-08
50-150  4.642e-07   1.791e-07
15-150  8.285e-07   2.759e-07

Peak spectrum fit

Power-law model

Time interval is from   25.920 sec. to   26.920 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.39822     ( -0.500285   0.467908 )
Norm@50keV  : 4.68575E-03    ( -0.00142214   0.00142178 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.57 using 59 PHA bins.
# Reduced chi-squared =          1.045 for     57 degrees of freedom 
# Null hypothesis probability =   3.821454e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.570437 ( -0.183042  0.185957 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.5291e-08 ( -1.41816e-08  1.43341e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   25.920 sec. to   26.920 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.497737     ( -4.43932   2.09329 )
Epeak [keV] : 62.0674      ( -20.7957 -61.8599 )
Norm@50keV  : 4.72159E-02    ( -0.0482708   16.0416 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.72 using 59 PHA bins.
# Reduced chi-squared =          1.031 for     56 degrees of freedom 
# Null hypothesis probability =   4.113029e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.545847 ( -0.180548  0.187228 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.97996e-08 ( -1.48635e-08  1.62381e-08 ) ergs/cm2

Band function

Time interval is from   25.920 sec. to   26.920 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 5.00000   ( -5.48208   -5 )
beta        : -2.07913    ( -1.43763   0.751162 )
Epeak [keV] : 36.7875      ( -11.367 11.4815 )
Norm@50keV   : 55.5184    ( -15.6801   426.976 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.17 using 59 PHA bins.
# Reduced chi-squared =          1.003 for     55 degrees of freedom 
# Null hypothesis probability =   4.681642e-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]    : 14.3797  (-3.87653  6.08693)
R^2/D10^2   : 8.32581E-02  (-0.0832894   0.177883)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.13 using 59 PHA bins.
# Reduced chi-squared =          1.020 for     57 degrees of freedom 
# Null hypothesis probability =   4.333464e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.626e-09   2.344e-09
25- 50  1.384e-08   6.845e-09
50-150  1.910e-08   1.348e-08
15-150  3.658e-08   1.945e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.343       (-124.118      -199.356)
Norm        : 2.42745       (-0.731742     0.843398)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.23 using 59 PHA bins.
# Reduced chi-squared =          1.039 for     57 degrees of freedom 
# Null hypothesis probability =   3.941652e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.045e-09   3.788e-09
25- 50  1.163e-08   7.080e-09
50-150  2.550e-08   1.542e-08
15-150  4.317e-08   2.569e-08

Double BB

R1^2/D10^2  : 0.149619        (      )
kT2 [keV]   : 200.000        (      )
R2^2/D10^2  : 5.24246E-05    (-5.24185e-05   -5.24185e-05)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.42 using 59 PHA bins.
#Fit statistic : Chi-Squared =          56.38 using 59 PHA bins.
#Fit statistic : Chi-Squared =          56.28 using 59 PHA bins.
# Reduced chi-squared =          1.026 for     55 degrees of freedom 
# Reduced chi-squared =          1.025 for     55 degrees of freedom 
# Reduced chi-squared =          1.023 for     55 degrees of freedom 
# Null hypothesis probability =   4.217658e-01
# Null hypothesis probability =   4.229155e-01
# Null hypothesis probability =   4.267428e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.607e-09   2.951e-09
25- 50  1.401e-08   9.240e-09
50-150  2.561e-08   1.180e-08
15-150  4.423e-08   2.325e-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: 1.60138     ( -0.227555   0.231438 )
Norm@50keV  : 1.25153E-03    ( -0.00016753   0.000166127 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.03 using 59 PHA bins.
# Reduced chi-squared =          1.018 for     57 degrees of freedom 
# Null hypothesis probability =   4.370189e-01
 
Photon flux (15-150 keV)    in 77.9 sec: 0.160896 ( -0.0215995  0.0216851 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.11625e-07 ( -1.29315e-07  1.30369e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.46749     ( -1.10749   0.35692 )
Epeak [keV] : 197.934      ( -210.897 -210.897 )
Norm@50keV  : 1.46181E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.98 using 59 PHA bins.
# Reduced chi-squared =          1.035 for     56 degrees of freedom 
# Null hypothesis probability =   4.020507e-01
 
Photon flux (15-150 keV)    in 77.9 sec: 0.160030 ( -0.022633  0.022281 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.04972e-07 ( -1.41914e-07  1.35507e-07 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.27712   ( 1.17687   6.17379 )
beta        : -1.79971    ( 1.79621   0.414075 )
Epeak [keV] : 105.156      ( -95.1377 -95.1377 )
Norm@50keV   : 1.85290E-03    ( -0.00076184   0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.82 using 59 PHA bins.
# Reduced chi-squared =          1.051 for     55 degrees of freedom 
# Null hypothesis probability =   3.715725e-01
 
Photon flux (15-150 keV)    in 77.9 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)  = 2.36e-07
S(50-100 keV) = 3.12e-07

T90 vs. Hardness ratio plot

T90                                   = 69.5240000188351 sec.
Hardness ratio (energy fluence ratio) = 1.32203

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.20923
Count Ratio (50-100 keV) / (15-25 keV) = 1.10321

Mask shadow pattern

IMX = -9.169292814534188E-01, IMY = 1.951650647949089E-01

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 80.000000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 80.000000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 80.000000

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:
-299.000000 -22.168000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
158.5521   9.1502    2.9  40.7   71.5   2.8750   4.0 ------	UNKNOWN                       
 73.9008  73.0586    2.3  51.2 -162.8   2.0403   5.1 ------	UNKNOWN                       
 60.6138  66.0694    3.2  59.1 -166.1   4.2229   3.6 ------	UNKNOWN

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

Time interval of the image:
-22.168000 55.736000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
103.8192  64.8346    2.5  44.1 -178.1   0.6644   4.6 ------	UNKNOWN                       
103.4432  71.8390    0.9  43.2 -168.0   1.6167  12.8 ------	UNKNOWN                       
230.6096  55.4271    2.4  33.0  -87.9   0.7177   4.8 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:

Plot creation:
Sun May 31 14:21:02 EDT 2015