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Image
Pre-slew 15.0-350.0 keV image (Event data)
 
#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  264.1959    46.3376   0.0165    39.6577    36.8678         2.0400041     11.659 TRIG_00150314                 
 
Foreground time interval of the image:
 -4.556  65.061 (delta_t =  69.617 [sec])
Background time interval of the image:
-299.640  -4.556 (delta_t = 295.084 [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 16.384000
 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 16.384000
 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 16.384000
 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   -4.556 sec. to  175.480 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.74676     ( -0.164045   0.169071 )
Norm@50keV  : 1.14752E-03    ( -0.000120602   0.000118996 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.19 using 59 PHA bins.
# Reduced chi-squared =          1.038 for     57 degrees of freedom 
# Null hypothesis probability =   3.954683e-01
 
Photon flux (15-150 keV)    in 180 sec: 0.154978 ( -0.014751  0.0147645 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.90631e-06 ( -2.06158e-07  2.08834e-07 ) ergs/cm2
 
Cutoff power-law model
 
Time interval is from   -4.556 sec. to  175.480 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.994583     ( -0.802598   0.674512 )
Epeak [keV] : 61.7575      ( -13.8866 110.385 )
Norm@50keV  : 2.90549E-03    ( -0.00161665   0.00483998 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.50 using 59 PHA bins.
# Reduced chi-squared =         0.9911 for     56 degrees of freedom 
# Null hypothesis probability =   4.936525e-01
 
Photon flux (15-150 keV)    in 180 sec: 0.150134 ( -0.015374  0.015369 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.79245e-06 ( -2.24908e-07  2.31071e-07 ) ergs/cm2
 
Band function
 
Time interval is from   -4.556 sec. to  175.480 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.994966   ( -0.645809   0.83132 )
beta        : -10.0000    ( 10   1.77636e-15 )
Epeak [keV] : 61.7567      ( -13.9062 50.0614 )
Norm@50keV   : 2.90388E-03    ( -0.00161502   0.00484754 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.50 using 59 PHA bins.
# Reduced chi-squared =          1.009 for     55 degrees of freedom 
# Null hypothesis probability =   4.556868e-01
 
Photon flux (15-150 keV)    in 180 sec: 0.150793 ( 6.84921  -0.015834 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.79734e-06 ( -1.79608e-06  -2.31343e-07 ) ergs/cm2
 
Single BB
 
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 12.4289  (-1.33884  1.51484)
R^2/D10^2   : 3.32474E-02  (-0.0114822   0.0173556)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          73.81 using 59 PHA bins.
# Reduced chi-squared =          1.295 for     57 degrees of freedom 
# Null hypothesis probability =   6.646144e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.959e-07   3.765e-08
25- 50  6.422e-07   7.947e-08
50-150  6.103e-07   1.339e-07
15-150  1.448e-06   1.764e-07
Thermal bremsstrahlung (OTTB)
 
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 115.127       (-35.417      60.7423)
Norm        : 0.661964       (-0.0773439     0.0985777)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.03 using 59 PHA bins.
# Reduced chi-squared =         0.9830 for     57 degrees of freedom 
# Null hypothesis probability =   5.114059e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.108e-07   4.086e-08
25- 50  5.520e-07   6.687e-08
50-150  9.649e-07   4.132e-07
15-150  1.828e-06   4.372e-07
Double BB
 
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.75817        (-2.23702      2.749)
R1^2/D10^2  : 0.299178        (-0.192918      1.38136)
kT2 [keV]   : 18.4439        (-4.23322      9.69062)
R2^2/D10^2  : 5.99698E-03    (-0.00447561   0.00719174)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.94 using 59 PHA bins.
# Reduced chi-squared =          1.017 for     55 degrees of freedom 
# Null hypothesis probability =   4.392803e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.960e-07   1.622e-07
25- 50  5.466e-07   2.842e-07
50-150  8.688e-07   4.877e-07
15-150  1.711e-06   8.591e-07
Peak spectrum fit
Power-law model
 
Time interval is from    5.472 sec. to    6.472 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.63790     ( -0.639598   0.696792 )
Norm@50keV  : 5.18440E-03    ( -0.00206756   0.00198049 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.28 using 59 PHA bins.
# Reduced chi-squared =         0.8294 for     57 degrees of freedom 
# Null hypothesis probability =   8.172020e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.674278 ( -0.251983  0.253297 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.82767e-08 ( -1.94483e-08  2.00639e-08 ) ergs/cm2
 
Cutoff power-law model
 
Time interval is from    5.472 sec. to    6.472 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.870557     ( -4.15201   1.38407 )
Epeak [keV] : 74.7661      ( -74.8134 -74.8134 )
Norm@50keV  : 1.25512E-02    ( -0.0125446   0.90028 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.00 using 59 PHA bins.
# Reduced chi-squared =         0.8393 for     56 degrees of freedom 
# Null hypothesis probability =   7.986031e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.654005 ( -0.265211  0.261628 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.64511e-08 ( -1.94833e-08  2.08618e-08 ) ergs/cm2
 
Band function
 
Time interval is from    5.472 sec. to    6.472 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.984035   ( -1.68417   3.02735 )
beta        : -9.32450    ( 9.36812   19.3681 )
Epeak [keV] : 81.0265      ( -49.2038 -80.8862 )
Norm@50keV   : 1.08611E-02    ( -0.0108754   0.0343281 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.01 using 59 PHA bins.
# Reduced chi-squared =         0.8547 for     55 degrees of freedom 
# Null hypothesis probability =   7.696752e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.657453 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.65145e-08 ( 0  0 ) ergs/cm2
 
Single BB
 
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 15.4276  (-5.72766  8.55607)
R^2/D10^2   : 6.91879E-02  (-0.0691879   0.288651)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.21 using 59 PHA bins.
# Reduced chi-squared =         0.8459 for     57 degrees of freedom 
# Null hypothesis probability =   7.899172e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.431e-09   2.252e-09
25- 50  1.398e-08   8.730e-09
50-150  2.293e-08   1.595e-08
15-150  4.034e-08   2.585e-08
Thermal bremsstrahlung (OTTB)
 
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 172.222       (-170.136      -170.136)
Norm        : 2.76045       (-1.02785     1.73506)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.09 using 59 PHA bins.
# Reduced chi-squared =         0.8261 for     57 degrees of freedom 
# Null hypothesis probability =   8.224896e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.996e-09   4.229e-09
25- 50  1.322e-08   7.890e-09
50-150  2.754e-08   1.738e-08
15-150  4.775e-08   3.051e-08
Double BB
 
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 3.74266        (-3.74852      16.2996)
R1^2/D10^2  : 7.63702        (-7.55287      -7.55287)
kT2 [keV]   : 18.3210        (-7.26192      -18.329)
R2^2/D10^2  : 3.40413E-02    (-0.0339741   0.190363)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.54 using 59 PHA bins.
# Reduced chi-squared =         0.8462 for     55 degrees of freedom 
# Null hypothesis probability =   7.844706e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.260e-09   4.329e-09
25- 50  1.214e-08   6.990e-09
50-150  2.609e-08   1.718e-08
15-150  4.549e-08   2.618e-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: 1.70180     ( -0.174167   0.179099 )
Norm@50keV  : 2.18789E-03    ( -0.000249237   0.00024663 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.69 using 59 PHA bins.
# Reduced chi-squared =         0.9771 for     57 degrees of freedom 
# Null hypothesis probability =   5.242595e-01
 
Photon flux (15-150 keV)    in 69.62 sec: 0.290759 ( -0.0308898  0.0309261 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.41013e-06 ( -1.66879e-07  1.68962e-07 ) ergs/cm2
 
Cutoff power-law model
 
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.481280     ( -0.993948   0.803924 )
Epeak [keV] : 57.7487      ( -10.2087 26.5913 )
Norm@50keV  : 9.78980E-03    ( -0.00606885   0.0230588 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.35 using 59 PHA bins.
# Reduced chi-squared =         0.8634 for     56 degrees of freedom 
# Null hypothesis probability =   7.563937e-01
 
Photon flux (15-150 keV)    in 69.62 sec: 0.277639 ( -0.032025  0.032049 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.28962e-06 ( -1.76194e-07  1.83484e-07 ) ergs/cm2
 
Band function
 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.481202   ( -0.291785   3.39704 )
beta        : -10.0000    ( 10   0 )
Epeak [keV] : 57.7375      ( -10.2084 26.5898 )
Norm@50keV   : 9.79115E-03    ( -0.00607116   0.023081 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.35 using 59 PHA bins.
# Reduced chi-squared =         0.8791 for     55 degrees of freedom 
# Null hypothesis probability =   7.247993e-01
 
Photon flux (15-150 keV)    in 69.62 sec: 0.281100 ( 6.7189  -0.036331 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.28916e-06 ( -1.28867e-06  -1.76682e-07 ) ergs/cm2
 
 S(25-50 keV) vs. S(50-100 keV) plot 
 
S(25-50 keV)  = 5.26e-07
S(50-100 keV) = 6.27e-07
 T90 vs. Hardness ratio plot 
 
T90                                   = 142.851999998093 sec.
Hardness ratio (energy fluence ratio) = 1.19202
 Color vs. Color plot 
 
Count Ratio  (25-50 keV) / (15-25 keV) = 1.32672
Count Ratio (50-100 keV) / (15-25 keV) = 0.839914
 Mask shadow pattern 
 
IMX = 6.631946392069351E-01, IMY = -4.973582093147902E-01
 TIME vs. PHA plot around the trigger time 
 
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 16.384000
 TIME vs. DetID plot around the trigger time 
 
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 16.384000
 100 us light curve (15-350 keV)
 
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 16.384000
 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:
-299.640000 -4.556000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.6101  35.3557    7.0  30.9   53.9   0.4625   1.6    7.5	Her X-1                       
245.6881  73.3097    2.5  47.6   -3.0   1.5541   4.6 ------	UNKNOWN                       
193.8049 -25.9189    3.6  59.0 -166.1   4.2871   3.2 ------	UNKNOWN                       
193.6253   3.3901    2.5  34.6 -143.3   1.0385   4.6 ------	UNKNOWN                       
 Pre-slew background subtracted image of 15-350 keV band 
Time interval of the image:
-4.556000 65.060620
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.4277  35.3928    6.0  30.7   53.8   0.2464   1.9    3.4	Her X-1                       
264.1959  46.3376    1.0  39.7   36.9   2.0394  11.7 ------	UNKNOWN                       
265.1180  59.1741    2.9  44.2   18.9   0.7380   4.0 ------	UNKNOWN                       
185.5177  -5.4571    2.3  46.6 -143.3   0.8885   4.9 ------	UNKNOWN                       
 Post-slew image of 15-350 keV band 
Time interval of the image:
121.860600 302.377600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.6241  35.3027    4.1  13.2 -175.3   0.3892   2.8    8.5	Her X-1                       
268.3057  -1.4565    7.1  47.9  142.7   0.9728   1.6    3.7	SW J1753.5-0127               
299.6013  35.1970    0.4  28.7   68.2   6.8749  32.3    0.6	Cyg X-1                       
308.0904  40.9787    1.6  31.8   51.7   1.6491   7.3    1.8	Cyg X-3                       
326.0058  38.3233    4.1  45.2   45.2  -1.5135  -2.9    7.8	Cyg X-2                       
239.0385   6.8079    2.1  45.1 -175.2   1.4055   5.4 ------	UNKNOWN                       
235.5188  27.9034    3.2  29.1 -151.1   0.5265   3.6 ------	UNKNOWN                       
213.6398  12.8187    3.5  54.0 -143.2   3.5048   3.4 ------	UNKNOWN                       
Plot creation:
Sun May 31 16:03:47 EDT 2015