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
  132.1705   -16.3432   0.0109    12.3190   124.3787         0.6975210     17.631 TRIG_00670800                 
 
Foreground time interval of the image:
  0.020  10.941 (delta_t =  10.921 [sec])
Background time interval of the image:
-728.859 -709.246 (delta_t =  19.613 [sec])
-239.360   0.020 (delta_t = 239.380 [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 1.024000
 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 1.024000
 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 1.024000
 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    0.020 sec. to   14.472 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.28512     ( -0.203745   0.218687 )
Norm@50keV  : 2.45111E-03    ( -0.000375634   0.000369281 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.28 using 59 PHA bins.
# Reduced chi-squared =         0.9173 for     57 degrees of freedom 
# Null hypothesis probability =   6.523348e-01
 
Photon flux (15-150 keV)    in 14.45 sec: 0.424883 ( -0.042257  0.042257 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.37627e-07 ( -4.19499e-08  4.32175e-08 ) ergs/cm2
 
Cutoff power-law model
 
Time interval is from    0.020 sec. to   14.472 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.77786     ( -1.09698   0.22099 )
Epeak [keV] : 16.1491      ( -15.6995 23.4895 )
Norm@50keV  : 5.07737E-03    ( -0.00510034   0.0204349 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.24 using 59 PHA bins.
# Reduced chi-squared =         0.9150 for     56 degrees of freedom 
# Null hypothesis probability =   6.552671e-01
 
Photon flux (15-150 keV)    in 14.45 sec: 0.417151 ( -0.043925  0.043803 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.17299e-07 ( -4.92414e-08  5.12268e-08 ) ergs/cm2
 
Band function
 
Time interval is from    0.020 sec. to   14.472 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.320479   ( 0.978149   0.978149 )
beta        : -2.55976    ( 2.52121   0.352962 )
Epeak [keV] : 24.2969      ( -23.2607 8.55892 )
Norm@50keV   : 5.94314E-02    ( -0.0594567   576.607 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.18 using 59 PHA bins.
# Reduced chi-squared =         0.9123 for     55 degrees of freedom 
# Null hypothesis probability =   6.591091e-01
 
Photon flux (15-150 keV)    in 14.45 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]    : 7.70521  (-0.867147  0.983064)
R^2/D10^2   : 0.534616  (-0.206257   0.337076)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.62 using 59 PHA bins.
# Reduced chi-squared =          1.169 for     57 degrees of freedom 
# Null hypothesis probability =   1.798214e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.054e-08   1.383e-08
25- 50  1.319e-07   1.866e-08
50-150  3.057e-08   1.056e-08
15-150  2.430e-07   2.998e-08
Thermal bremsstrahlung (OTTB)
 
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 40.5098       (-9.68354      14.6312)
Norm        : 2.71408       (-0.508582     0.658047)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.75 using 59 PHA bins.
# Reduced chi-squared =         0.9078 for     57 degrees of freedom 
# Null hypothesis probability =   6.718931e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.044e-08   1.183e-08
25- 50  1.196e-07   1.509e-08
50-150  9.384e-08   3.007e-08
15-150  3.039e-07   4.400e-08
Double BB
 
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.47675        (-1.34728      1.30269)
R1^2/D10^2  : 1.68323        (-0.910204      3.13007)
kT2 [keV]   : 18.4420        (-6.44466      16.0864)
R2^2/D10^2  : 9.66246E-03    (-0.00869626   0.0523772)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.15 using 59 PHA bins.
# Reduced chi-squared =         0.9118 for     55 degrees of freedom 
# Null hypothesis probability =   6.600264e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.344e-08   4.193e-08
25- 50  1.126e-07   4.508e-08
50-150  1.145e-07   6.637e-08
15-150  3.206e-07   1.366e-07
Peak spectrum fit
Power-law model
 
Time interval is from    2.172 sec. to    3.172 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.02596     ( -0.185595   0.195725 )
Norm@50keV  : 1.13811E-02    ( -0.00150172   0.0014686 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.30 using 59 PHA bins.
# Reduced chi-squared =          1.146 for     57 degrees of freedom 
# Null hypothesis probability =   2.105032e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.72800 ( -0.17787  0.17791 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.05133e-07 ( -1.28355e-08  1.3065e-08 ) ergs/cm2
 
Cutoff power-law model
 
Time interval is from    2.172 sec. to    3.172 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.43742     ( -1.14861   0.700244 )
Epeak [keV] : 38.1416      (   )
Norm@50keV  : 2.55914E-02    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          63.92 using 59 PHA bins.
# Reduced chi-squared =          1.141 for     56 degrees of freedom 
# Null hypothesis probability =   2.183001e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.69676 ( -0.18444  0.18347 ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 
Band function
 
Time interval is from    2.172 sec. to    3.172 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -4.13566E-02   ( -1.66015   0.0226415 )
beta        : -2.39311    ( -0.764027   0.379183 )
Epeak [keV] : 31.4168      ( -9.1615 11.7146 )
Norm@50keV   : 0.237545    ( -0.266219   839.244 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.01 using 59 PHA bins.
# Reduced chi-squared =          1.109 for     55 degrees of freedom 
# Null hypothesis probability =   2.688578e-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]    : 9.06493  (-0.962727  1.0939)
R^2/D10^2   : 1.19375  (-0.432312   0.66159)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          75.83 using 59 PHA bins.
# Reduced chi-squared =          1.330 for     57 degrees of freedom 
# Null hypothesis probability =   4.835433e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.917e-08   3.130e-09
25- 50  4.120e-08   5.145e-09
50-150  1.607e-08   4.910e-09
15-150  7.644e-08   1.011e-08
Thermal bremsstrahlung (OTTB)
 
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 60.5369       (-16.1262      25.6931)
Norm        : 9.06189       (-1.49862     1.76296)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          63.87 using 59 PHA bins.
# Reduced chi-squared =          1.121 for     57 degrees of freedom 
# Null hypothesis probability =   2.477730e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.281e-08   3.130e-09
25- 50  3.481e-08   3.785e-09
50-150  3.990e-08   1.081e-08
15-150  9.751e-08   1.241e-08
Double BB
 
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.40848        (-1.48446      1.3596)
R1^2/D10^2  : 2.27172        (-1.01797      2.47863)
kT2 [keV]   : 35.6686        (-17.6297      -35.7003)
R2^2/D10^2  : 4.09927E-03    (-0.00399364   0.0438433)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.03 using 59 PHA bins.
# Reduced chi-squared =          1.091 for     55 degrees of freedom 
# Null hypothesis probability =   2.984281e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.189e-08   5.305e-09
25- 50  3.707e-08   1.051e-08
50-150  4.603e-08   2.351e-08
15-150  1.050e-07   3.515e-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: 2.32134     ( -0.189276   0.202365 )
Norm@50keV  : 3.04028E-03    ( -0.000435309   0.000429414 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.28 using 59 PHA bins.
# Reduced chi-squared =         0.8119 for     57 degrees of freedom 
# Null hypothesis probability =   8.441659e-01
 
Photon flux (15-150 keV)    in 10.92 sec: 0.537694 ( -0.0498342  0.0498349 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.18542e-07 ( -3.65124e-08  3.7557e-08 ) ergs/cm2
 
Cutoff power-law model
 
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.51247     ( -1.12313   0.607575 )
Epeak [keV] : 21.8782      (   )
Norm@50keV  : 9.78032E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.62 using 59 PHA bins.
# Reduced chi-squared =         0.7790 for     56 degrees of freedom 
# Null hypothesis probability =   8.857762e-01
 
Photon flux (15-150 keV)    in 10.92 sec: 0.522987 ( -0.051559  0.051837 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.91192e-07 ( -4.09544e-08  4.59142e-08 ) ergs/cm2
 
Band function
 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 0.330937   ( -4.08797   0.626511 )
beta        : -2.72007    ( 9.37162   19.3716 )
Epeak [keV] : 25.3258      ( -21.2186 11.3995 )
Norm@50keV   : 0.216930    ( -0.204134   479.577 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          42.03 using 59 PHA bins.
# Reduced chi-squared =         0.7642 for     55 degrees of freedom 
# Null hypothesis probability =   9.005510e-01
 
Photon flux (15-150 keV)    in 10.92 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)  = 1.09e-07
S(50-100 keV) = 8.93e-08
 T90 vs. Hardness ratio plot 
 
T90                                   = 11.5359999537468 sec.
Hardness ratio (energy fluence ratio) = 0.819266
 Color vs. Color plot 
 
Count Ratio  (25-50 keV) / (15-25 keV) = 0.886587
Count Ratio (50-100 keV) / (15-25 keV) = 0.358511
 Mask shadow pattern 
 
IMX = -1.233120555355369E-01, IMY = -1.802365736885335E-01
 TIME vs. PHA plot around the trigger time 
 
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
 TIME vs. DetID plot around the trigger time 
 
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
 100 us light curve (15-350 keV)
 
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
 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:
-728.859370 -709.246000
-239.360000 0.020000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.4825 -40.5198    1.9  13.0  -87.0   1.4148   6.1    3.0	Vela X-1                      
 87.7110 -15.2716    3.4  40.9   32.8   1.7018   3.4 ------	UNKNOWN                       
178.1922  -0.4007    3.5  54.1 -179.4   3.2221   3.3 ------	UNKNOWN                       
113.0676 -43.6030    2.6  20.2  -30.0   1.0636   4.4 ------	UNKNOWN                       
188.2774 -11.3236    3.2  57.1 -161.7   4.3225   3.6 ------	UNKNOWN                       
190.7842 -12.5442    3.4  58.8 -159.2   6.2800   3.4 ------	UNKNOWN                       
 Pre-slew background subtracted image of 15-350 keV band 
Time interval of the image:
0.020000 10.940600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.4177 -40.6336    6.7  13.1  -86.6  -0.0744  -1.7    6.9	Vela X-1                      
159.4470   2.1045    2.5  41.8  161.2   0.3792   4.6 ------	UNKNOWN                       
132.1712 -16.3427    0.7  12.3  124.4   0.6954  17.6 ------	UNKNOWN                       
168.6909  -7.9452    2.2  42.1 -178.4   0.3491   5.2 ------	UNKNOWN                       
 69.3943 -51.7204    2.8  49.9  -22.2   0.3701   4.2 ------	UNKNOWN                       
140.2822 -68.2415    2.1  40.3  -73.0   0.7187   5.5 ------	UNKNOWN                       
 Post-slew image of 15-350 keV band 
Time interval of the image:
44.140620 838.585900
840.640000 962.680000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.4329 -40.5418    1.8  24.3  -76.0   4.7432   6.5    4.4	Vela X-1                      
 92.4733  -4.0935    2.8  40.9   33.0   4.4669   4.1 ------	UNKNOWN                       
 79.2750 -18.5847    3.1  50.3    9.1   5.3358   3.8 ------	UNKNOWN                       
164.3697  -3.6151    2.8  34.1 -178.5   3.0126   4.2 ------	UNKNOWN                       
159.9292 -32.0413    2.9  29.6 -123.0   2.9901   3.9 ------	UNKNOWN                       
170.4299 -44.4805    3.3  42.7 -110.7  10.1817   3.5 ------	UNKNOWN                       
Plot creation:
Fri Mar 18 11:53:50 EDT 2016