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
  292.2712    33.9059   0.0248    11.3888  -173.9397         0.0753820      7.784 TRIG_00650617                 
 
Foreground time interval of the image:
  0.240   1.200 (delta_t =   0.960 [sec])
Background time interval of the image:
-239.952   0.240 (delta_t = 240.192 [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    0.240 sec. to    1.200 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.01826     ( -0.445039   0.517055 )
Norm@50keV  : 3.68008E-03    ( -0.00121558   0.00112565 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.46 using 59 PHA bins.
# Reduced chi-squared =         0.9554 for     57 degrees of freedom 
# Null hypothesis probability =   5.709601e-01
 
Photon flux (15-150 keV)    in 0.96 sec: 0.556700 ( -0.125593  0.125596 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.26132e-08 ( -9.42129e-09  9.92352e-09 ) ergs/cm2
 
Cutoff power-law model
 
Time interval is from    0.240 sec. to    1.200 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.39905     ( -1.43163   0.17423 )
Epeak [keV] : 147.394      (   )
Norm@50keV  : 2.33391E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.07 using 59 PHA bins.
# Reduced chi-squared =         0.9655 for     56 degrees of freedom 
# Null hypothesis probability =   5.483001e-01
 
Photon flux (15-150 keV)    in 0.96 sec: 0.556489 ( -0.125521  0.125512 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.25192e-08 ( -9.44957e-09  9.69821e-09 ) ergs/cm2
 
Band function
 
Time interval is from    0.240 sec. to    1.200 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.98492   ( -4.98492   -4.98492 )
beta        : -2.06150    ( -0.686443   0.470125 )
Epeak [keV] : 18.2273      ( -18.2273 71.8904 )
Norm@50keV   : 4851.13    ( -1092.48   7.78597e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.31 using 59 PHA bins.
# Reduced chi-squared =         0.9874 for     55 degrees of freedom 
# Null hypothesis probability =   5.010653e-01
 
Photon flux (15-150 keV)    in 0.96 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]    : 8.64549  (-2.99332  4.23152)
R^2/D10^2   : 0.430129  (-0.327201   1.83965)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          63.61 using 59 PHA bins.
# Reduced chi-squared =          1.116 for     57 degrees of freedom 
# Null hypothesis probability =   2.550859e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.877e-09   3.438e-09
25- 50  1.172e-08   5.745e-09
50-150  3.947e-09   2.756e-09
15-150  2.154e-08   1.312e-08
Thermal bremsstrahlung (OTTB)
 
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 66.9150       (-36.4574      -66.9492)
Norm        : 2.76068       (-0.894733     1.60493)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.92 using 59 PHA bins.
# Reduced chi-squared =         0.9810 for     57 degrees of freedom 
# Null hypothesis probability =   5.157405e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.765e-09   2.622e-09
25- 50  1.063e-08   4.696e-09
50-150  1.320e-08   9.946e-09
15-150  3.059e-08   1.645e-08
Double BB
 
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 4.35472        (-1.76669      2.90564)
R1^2/D10^2  : 5.46046        (-4.6815      66.007)
kT2 [keV]   : 21.0382        (-9.29108      -21.0393)
R2^2/D10^2  : 1.20186E-02    (-0.0119698   0.0857681)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.08 using 59 PHA bins.
# Reduced chi-squared =         0.9833 for     55 degrees of freedom 
# Null hypothesis probability =   5.096159e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.054e-09   4.540e-09
25- 50  8.202e-09   4.342e-09
50-150  1.643e-08   1.116e-08
15-150  3.269e-08   1.735e-08
Peak spectrum fit
Power-law model
 
Time interval is from    0.220 sec. to    1.220 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.96165     ( -0.449209   0.52015 )
Norm@50keV  : 3.68241E-03    ( -0.00119289   0.0010936 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.13 using 59 PHA bins.
# Reduced chi-squared =          1.020 for     57 degrees of freedom 
# Null hypothesis probability =   4.333085e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.542846 ( -0.122912  0.122911 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.39009e-08 ( -9.81423e-09  1.02668e-08 ) ergs/cm2
 
Cutoff power-law model
 
Time interval is from    0.220 sec. to    1.220 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.95468     ( -0.600287   0.52901 )
Epeak [keV] : 9999.09      (   )
Norm@50keV  : 3.69481E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.14 using 59 PHA bins.
# Reduced chi-squared =          1.038 for     56 degrees of freedom 
# Null hypothesis probability =   3.966102e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.542615 ( -0.122872  0.122873 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.37654e-08 ( -9.6699e-09  1.01945e-08 ) ergs/cm2
 
Band function
 
Time interval is from    0.220 sec. to    1.220 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.99490   ( -4.9949   -4.9949 )
beta        : -1.99311    ( -0.599365   0.468716 )
Epeak [keV] : 17.6798      ( -17.6798 7.19237 )
Norm@50keV   : 5722.82    ( -1294.57   7.1606e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.04 using 59 PHA bins.
# Reduced chi-squared =          1.055 for     55 degrees of freedom 
# Null hypothesis probability =   3.640161e-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]    : 9.82970  (-4.22486  5.44585)
R^2/D10^2   : 0.253552  (-0.196311   1.93996)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          68.99 using 59 PHA bins.
# Reduced chi-squared =          1.210 for     57 degrees of freedom 
# Null hypothesis probability =   1.325505e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.959e-09   2.778e-09
25- 50  1.203e-08   6.222e-09
50-150  5.974e-09   3.803e-09
15-150  2.297e-08   1.270e-08
Thermal bremsstrahlung (OTTB)
 
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 79.8853       (-45.4332      -79.9546)
Norm        : 2.51994       (-0.747934     1.37093)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.73 using 59 PHA bins.
# Reduced chi-squared =          1.048 for     57 degrees of freedom 
# Null hypothesis probability =   3.767711e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.538e-09   3.205e-09
25- 50  1.076e-08   4.026e-09
50-150  1.517e-08   1.229e-08
15-150  3.247e-08   1.994e-08
Double BB
 
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 4.02220        (-1.45218      2.03178)
R1^2/D10^2  : 7.57406        (-6.36249      70.3781)
kT2 [keV]   : 21.2194        (-8.1196      31.5797)
R2^2/D10^2  : 1.23456E-02    (-0.0115346   0.0583413)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.74 using 59 PHA bins.
# Reduced chi-squared =          1.032 for     55 degrees of freedom 
# Null hypothesis probability =   4.101302e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.121e-09   4.576e-09
25- 50  8.004e-09   4.316e-09
50-150  1.820e-08   1.147e-08
15-150  3.432e-08   1.847e-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: 2.01826     ( -0.445039   0.517055 )
Norm@50keV  : 3.68008E-03    ( -0.00121558   0.00112565 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.46 using 59 PHA bins.
# Reduced chi-squared =         0.9554 for     57 degrees of freedom 
# Null hypothesis probability =   5.709601e-01
 
Photon flux (15-150 keV)    in 0.96 sec: 0.556700 ( -0.125593  0.125596 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.26132e-08 ( -9.42129e-09  9.92352e-09 ) ergs/cm2
 
Cutoff power-law model
 
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.39905     ( -1.43163   0.174232 )
Epeak [keV] : 147.394      (   )
Norm@50keV  : 2.33391E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.07 using 59 PHA bins.
# Reduced chi-squared =         0.9655 for     56 degrees of freedom 
# Null hypothesis probability =   5.483001e-01
 
Photon flux (15-150 keV)    in 0.96 sec: 0.556489 ( -0.125521  0.125512 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.25192e-08 ( -9.44957e-09  9.69821e-09 ) ergs/cm2
 
Band function
 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.98492   ( -4.98492   -4.98492 )
beta        : -2.06150    ( -0.686443   0.470125 )
Epeak [keV] : 18.2273      ( -18.2273 95.3662 )
Norm@50keV   : 4851.13    ( -1092.48   7.78597e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.31 using 59 PHA bins.
# Reduced chi-squared =         0.9874 for     55 degrees of freedom 
# Null hypothesis probability =   5.010653e-01
 
Photon flux (15-150 keV)    in 0.96 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)  = 9.87e-09
S(50-100 keV) = 9.75e-09
 T90 vs. Hardness ratio plot 
 
T90                                   = 0.832000017166138 sec.
Hardness ratio (energy fluence ratio) = 0.987842
 Color vs. Color plot 
 
Count Ratio  (25-50 keV) / (15-25 keV) = 0.884803
Count Ratio (50-100 keV) / (15-25 keV) = 0.612209
 Mask shadow pattern 
 
IMX = -2.003064599409896E-01, IMY = 2.126625601115743E-02
 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:
-239.952000 0.240000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.3794  35.3516    7.3  42.0 -160.8   0.4858   1.6    3.9	Her X-1                       
268.5665  -1.5668    0.0  49.9  144.5   0.7346   0.7   13.7	SW J1753.5-0127               
288.9254  11.0331   10.6  27.6  130.3   0.2533   1.1    9.1	GRS 1915+105                  
299.5951  35.1990    0.4   5.4 -161.9   5.0082  26.0    0.3	Cyg X-1                       
308.1174  40.9593    0.8   7.3  -75.4   2.3934  14.0    0.5	Cyg X-3                       
326.1711  38.3207   22.4  16.9  -19.3   0.0976   0.5    0.1	Cyg X-2                       
350.9669  20.4716    2.7  41.8    8.7   1.2571   4.2 ------	UNKNOWN                       
286.7703  25.5346    2.9  18.6  160.5   0.7340   4.0 ------	UNKNOWN                       
 13.0748  50.9553    2.7  50.5  -39.3   3.4248   4.2 ------	UNKNOWN                       
 Pre-slew background subtracted image of 15-350 keV band 
Time interval of the image:
0.240000 1.200000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.3808  35.2409    4.1  42.1 -161.0  -0.0438  -2.8    7.2	Her X-1                       
268.4225  -1.4427   35.9  49.9  144.8  -0.0181  -0.3    3.3	SW J1753.5-0127               
288.7835  10.8360    4.7  27.9  130.3  -0.0326  -2.4    6.6	GRS 1915+105                  
299.5878  35.3413  667.5   5.5 -160.5   0.0002   0.0    8.4	Cyg X-1                       
307.9153  40.8459    6.9   7.2  -76.4   0.0154   1.7   10.9	Cyg X-3                       
326.3286  38.1511    0.0  17.0  -18.6   0.0093   1.0   12.6	Cyg X-2                       
292.2713  33.9059    1.5  11.4 -173.9   0.0754   7.8 ------	UNKNOWN                       
  2.9587  29.4664    2.6  48.1   -9.3   0.0811   4.4 ------	UNKNOWN                       
 Post-slew image of 15-350 keV band 
Time interval of the image:
53.948590 962.101700
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.4879  35.5537    0.0  30.9 -148.2   0.1678   0.3   12.8	Her X-1                       
268.2710  -1.3509    4.5  41.9  145.4   3.7626   2.5    8.4	SW J1753.5-0127               
288.9653  10.9108    5.2  23.2  116.2   1.4399   2.2   10.1	GRS 1915+105                  
299.5989  35.1961    0.3   6.1    3.7  19.1278  38.7    0.5	Cyg X-1                       
308.1252  40.9347    0.7  14.4  -16.0   9.7508  17.2    1.3	Cyg X-3                       
326.1144  38.4246    4.8  27.5   -1.4   1.3434   2.4    6.7	Cyg X-2                       
323.5758  13.2799    2.7  35.1   46.3   3.8765   4.2 ------	UNKNOWN                       
252.2547  -1.4847    2.8  51.6  163.0   9.0978   4.2 ------	UNKNOWN                       
289.3801  23.2356    3.3  11.0  122.1   1.7998   3.5 ------	UNKNOWN                       
260.3519  25.5745    2.7  28.8 -170.3   2.3398   4.2 ------	UNKNOWN                       
338.1437  50.0677    3.1  37.0  -22.2   2.6185   3.7 ------	UNKNOWN                       
313.6700  54.6779    2.8  25.6  -42.9   2.3484   4.1 ------	UNKNOWN                       
231.5749  15.0234    4.7  57.6 -165.4   6.8582   2.4 ------	UNKNOWN                       
256.9583  48.4477    2.8  29.9 -122.4   2.9166   4.1 ------	UNKNOWN                       
Plot creation:
Sun Aug 30 19:05:12 EDT 2015