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Image
Pre-slew 15.0-350.0 keV image (Event data)
 
#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  290.0369    76.9561   0.0079    33.5607   -89.8446         2.1660680     24.229 TRIG_00429969                 
 
Foreground time interval of the image:
 -4.812  12.589 (delta_t =  17.401 [sec])
Background time interval of the image:
-239.512  -4.812 (delta_t = 234.700 [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)
 
 The mask-weighted light curves based on cleaned DPHs 
 
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   -4.812 sec. to  225.256 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.82004     ( -0.0581852   0.0585734 )
Norm@50keV  : 3.08860E-03    ( -9.10623e-05   9.06612e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.93 using 59 PHA bins.
# Reduced chi-squared =         0.9286 for     57 degrees of freedom 
# Null hypothesis probability =   6.283554e-01
 
Photon flux (15-150 keV)    in 230.1 sec: 0.428954 ( -0.0133876  0.0134456 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.53854e-06 ( -1.95273e-07  1.9607e-07 ) ergs/cm2
 
Cutoff power-law model
 
Time interval is from   -4.812 sec. to  225.256 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.81916     ( -0.159541   0.217825 )
Epeak [keV] : 1.00000E+04      (   )
Norm@50keV  : 3.09199E-03    ( -9.13159e-05   8.64675e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.94 using 59 PHA bins.
# Reduced chi-squared =         0.9454 for     56 degrees of freedom 
# Null hypothesis probability =   5.914237e-01
 
Photon flux (15-150 keV)    in 230.1 sec: 0.428696 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.53735e-06 ( -1.87969e-07  1.92203e-07 ) ergs/cm2
 
Band function
 
Time interval is from   -4.812 sec. to  225.256 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 0.456318   ( 1.25416   1.25416 )
beta        : -1.83402    ( -0.072869   0.0612868 )
Epeak [keV] : 24.0761      ( -29.6683 -29.6683 )
Norm@50keV   : 0.191249    ( -0.19097   576.115 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.17 using 59 PHA bins.
# Reduced chi-squared =         0.9485 for     55 degrees of freedom 
# Null hypothesis probability =   5.836169e-01
 
Photon flux (15-150 keV)    in 230.1 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]    : 13.2441  (  )
R^2/D10^2   : 6.53838E-02  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         377.62 using 59 PHA bins.
# Reduced chi-squared =         6.6250 for     57 degrees of freedom 
# Null hypothesis probability =   7.942884e-49
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.594e-07   3.049e-08
25- 50  1.966e-06   6.351e-08
50-150  2.203e-06   1.423e-07
15-150  4.728e-06   1.576e-07
Thermal bremsstrahlung (OTTB)
 
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 119.571       (-21.1282      17.4368)
Norm        : 1.72410       (-0.0646103     0.107969)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          72.52 using 59 PHA bins.
# Reduced chi-squared =          1.272 for     57 degrees of freedom 
# Null hypothesis probability =   8.068597e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.033e-06   6.431e-08
25- 50  1.848e-06   8.790e-08
50-150  3.292e-06   7.777e-07
15-150  6.173e-06   7.961e-07
Double BB
 
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.13045        (-0.571009      0.625682)
R1^2/D10^2  : 0.851836        (-0.265705      0.411976)
kT2 [keV]   : 23.7564        (-2.21676      2.85781)
R2^2/D10^2  : 6.13642E-03    (-0.00210647   0.0027589)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          63.98 using 59 PHA bins.
# Reduced chi-squared =          1.163 for     55 degrees of freedom 
# Null hypothesis probability =   1.903783e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.151e-06   1.004e-07
25- 50  1.839e-06   1.016e-07
50-150  3.409e-06   2.646e-07
15-150  6.399e-06   3.590e-07
Peak spectrum fit
Power-law model
 
Time interval is from  132.408 sec. to  133.408 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.35731     ( -0.110029   0.110395 )
Norm@50keV  : 1.87992E-02    ( -0.00120884   0.00120366 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.53 using 59 PHA bins.
# Reduced chi-squared =          1.027 for     57 degrees of freedom 
# Null hypothesis probability =   4.188469e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.26820 ( -0.144271  0.144348 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.83309e-07 ( -1.33269e-08  1.34216e-08 ) ergs/cm2
 
Cutoff power-law model
 
Time interval is from  132.408 sec. to  133.408 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.13407     ( -0.463186   0.279029 )
Epeak [keV] : 195.175      ( -195.186 -195.186 )
Norm@50keV  : 2.43818E-02    ( -0.00653031   0.0168671 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.73 using 59 PHA bins.
# Reduced chi-squared =          1.031 for     56 degrees of freedom 
# Null hypothesis probability =   4.110003e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.24654 ( -0.15026  0.14977 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.80032e-07 ( -1.496e-08  1.4819e-08 ) ergs/cm2
 
Band function
 
Time interval is from  132.408 sec. to  133.408 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.878833   ( 0.879154   0.879154 )
beta        : -1.52873    ( 1.52971   0.244594 )
Epeak [keV] : 102.280      ( -102.783 -102.783 )
Norm@50keV   : 3.43780E-02    ( -0.0152706   814.258 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.95 using 59 PHA bins.
# Reduced chi-squared =          1.035 for     55 degrees of freedom 
# Null hypothesis probability =   4.022875e-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]    : 15.7602  (-1.26965  1.40485)
R^2/D10^2   : 0.221817  (-0.0560774   0.0736777)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         108.63 using 59 PHA bins.
# Reduced chi-squared =         1.9058 for     57 degrees of freedom 
# Null hypothesis probability =   4.522150e-05
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.143e-08   1.432e-09
25- 50  4.747e-08   3.840e-09
50-150  8.193e-08   1.065e-08
15-150  1.408e-07   1.285e-08
Thermal bremsstrahlung (OTTB)
 
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (      )
Norm        : 9.25318       (-0.590123     0.590128)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.72 using 59 PHA bins.
# Reduced chi-squared =          1.153 for     57 degrees of freedom 
# Null hypothesis probability =   2.004993e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.318e-08   1.555e-09
25- 50  4.458e-08   4.030e-09
50-150  9.778e-08   2.484e-08
15-150  1.655e-07   3.240e-08
Double BB
 
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.36282        (-2.30878      2.56977)
R1^2/D10^2  : 1.24057        (-0.645358      1.53889)
kT2 [keV]   : 32.4354        (-9.4511      37.0012)
R2^2/D10^2  : 1.50149E-02    (-0.0130328   0.035682)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.77 using 59 PHA bins.
# Reduced chi-squared =          1.105 for     55 degrees of freedom 
# Null hypothesis probability =   2.758247e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.854e-08   3.970e-09
25- 50  4.551e-08   1.016e-08
50-150  1.167e-07   5.296e-08
15-150  1.807e-07   6.159e-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: 1.49037     ( -0.0989238   0.0993594 )
Norm@50keV  : 8.53432E-03    ( -0.00051303   0.00051212 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          79.43 using 59 PHA bins.
# Reduced chi-squared =          1.393 for     57 degrees of freedom 
# Null hypothesis probability =   2.646608e-02
 
Photon flux (15-150 keV)    in 17.4 sec: 1.06268 ( -0.064613  0.0646947 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.41096e-06 ( -9.18153e-08  9.22482e-08 ) ergs/cm2
 
Cutoff power-law model
 
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.661901     ( -0.466934   0.421514 )
Epeak [keV] : 82.2200      ( -13.7481 33.4239 )
Norm@50keV  : 2.19981E-02    ( -0.00823619   0.0148786 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.09 using 59 PHA bins.
# Reduced chi-squared =          1.198 for     56 degrees of freedom 
# Null hypothesis probability =   1.473175e-01
 
Photon flux (15-150 keV)    in 17.4 sec: 1.02512 ( -0.067284  0.0673 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.33884e-06 ( -9.88111e-08  9.93731e-08 ) ergs/cm2
 
Band function
 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.661697   ( -0.332171   0.563343 )
beta        : -10.0000    ( 10   5.32907e-15 )
Epeak [keV] : 82.1976      ( -13.7192 33.4279 )
Norm@50keV   : 2.20031E-02    ( -0.00823399   0.0148906 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.09 using 59 PHA bins.
# Reduced chi-squared =          1.220 for     55 degrees of freedom 
# Null hypothesis probability =   1.270606e-01
 
Photon flux (15-150 keV)    in 17.4 sec: 1.03308 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.34028e-06 ( -1.34016e-06  -1.00887e-07 ) ergs/cm2
 
 S(25-50 keV) vs. S(50-100 keV) plot 
 
S(25-50 keV)  = 1.85e-06
S(50-100 keV) = 2.10e-06
 T90 vs. Hardness ratio plot 
 
T90                                   = 173.695999920368 sec.
Hardness ratio (energy fluence ratio) = 1.13514
 Color vs. Color plot 
 
Count Ratio  (25-50 keV) / (15-25 keV) = 1.08757
Count Ratio (50-100 keV) / (15-25 keV) = 0.673829
 Mask shadow pattern 
 
IMX = 1.799276477557046E-03, IMY = 6.634084591647635E-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:
-239.512000 -4.812000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.2453  35.3246    6.0  41.3 -166.1  -0.5375  -1.9   10.4	Her X-1                       
288.7811  10.9822    1.8  37.0  129.3   2.3459   6.4    2.4	GRS 1915+105                  
299.6042  35.1932    1.3  11.0  134.8   1.3851   8.9    0.8	Cyg X-1                       
308.1168  40.9554    1.0   3.3   92.2   1.7907  11.3    0.3	Cyg X-3                       
326.1105  38.1791    5.8  15.0   24.5   0.3139   2.0    9.0	Cyg X-2                       
355.2530  23.6718    2.2  43.7   19.3   1.6050   5.2 ------	UNKNOWN                       
249.6695  16.8112    2.8  55.6  177.1   3.1543   4.1 ------	UNKNOWN                       
322.3736  85.1195    1.8  41.1  -80.8   4.9496   6.6 ------	UNKNOWN                       
 Pre-slew background subtracted image of 15-350 keV band 
Time interval of the image:
-4.812000 12.588600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.4577  35.3433   75.9  41.2 -166.2  -0.0088  -0.2    0.1	Her X-1                       
288.8136  10.9414  617.2  37.0  129.2   0.0016   0.0    0.9	GRS 1915+105                  
299.5655  35.3493    7.0  10.8  135.3  -0.0689  -1.7    8.9	Cyg X-1                       
307.9186  41.0858    9.9   3.1   94.8  -0.0503  -1.2   11.8	Cyg X-3                       
325.9985  38.4653    3.9  14.8   23.7   0.1182   3.0   11.9	Cyg X-2                       
345.7868  22.8302    2.1  37.7   29.1   0.3770   5.4 ------	UNKNOWN                       
307.6508  27.2070    2.6  17.0   97.5   0.2088   4.5 ------	UNKNOWN                       
247.9353  19.4221    2.1  55.1 -179.2   0.8354   5.4 ------	UNKNOWN                       
346.1072  49.3254    2.2  26.5  -17.6   0.2251   5.2 ------	UNKNOWN                       
290.0369  76.9561    0.5  33.6  -89.8   2.1659  24.2 ------	UNKNOWN                       
 Post-slew image of 15-350 keV band 
Time interval of the image:
67.188590 962.577800
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.5498  35.4591   11.4  44.4  146.7  -1.3659  -1.0    8.3	Her X-1                       
308.0843  40.9593    2.4  36.8   81.1   7.6307   4.8    1.2	Cyg X-3                       
326.1620  38.3020   62.1  41.7   60.0  -0.3186  -0.2    1.3	Cyg X-2                       
 13.7517  48.9977    3.0  41.3    5.3   2.6982   3.8 ------	UNKNOWN                       
290.0246  76.9472    0.6   0.0 -132.0   9.5330  19.1 ------	UNKNOWN                       
 19.4178  65.2541    1.8  27.6  -11.6   3.4470   6.6 ------	UNKNOWN                       
187.3517  45.7875    2.7  48.4 -141.3   5.6971   4.2 ------	UNKNOWN                       
116.7763  61.9160    2.7  41.1  -80.7   9.5928   4.3 ------	UNKNOWN                       
Plot creation:
Sun May 31 00:47:09 EDT 2015