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Image
Pre-slew 15.0-350.0 keV image (Event data)
 
#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  220.2552    -2.4968   0.0071    48.4160  -164.1737         1.9889316     27.174 TRIG_00565263                 
 
Foreground time interval of the image:
  0.140  10.741 (delta_t =  10.601 [sec])
Background time interval of the image:
-176.459   0.140 (delta_t = 176.599 [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 0.512000
 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 0.512000
 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 0.512000
 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    0.140 sec. to   45.760 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.64546     ( -0.141344   0.143139 )
Norm@50keV  : 3.30444E-03    ( -0.00027469   0.00027368 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.75 using 59 PHA bins.
# Reduced chi-squared =         0.8202 for     57 degrees of freedom 
# Null hypothesis probability =   8.317438e-01
 
Photon flux (15-150 keV)    in 45.62 sec: 0.430836 ( -0.0369092  0.0370341 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.40266e-06 ( -1.22101e-07  1.22648e-07 ) ergs/cm2
 
Cutoff power-law model
 
Time interval is from    0.140 sec. to   45.760 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.16658     ( -0.690248   0.538435 )
Epeak [keV] : 88.5508      ( -26.7605 -88.5573 )
Norm@50keV  : 5.71953E-03    ( -0.0018979   0.0067319 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          44.90 using 59 PHA bins.
# Reduced chi-squared =         0.8018 for     56 degrees of freedom 
# Null hypothesis probability =   8.561503e-01
 
Photon flux (15-150 keV)    in 45.62 sec: 0.420628 ( -0.039  0.039086 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.36217e-06 ( -1.35122e-07  1.33703e-07 ) ergs/cm2
 
Band function
 
Time interval is from    0.140 sec. to   45.760 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.653542   ( -1.06325   2.47619 )
beta        : -1.94581    ( 1.94262   0.33381 )
Epeak [keV] : 59.3052      ( -28.0832 302.02 )
Norm@50keV   : 1.13936E-02    ( -0.00723189   0.342393 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.96 using 59 PHA bins.
# Reduced chi-squared =         0.7993 for     55 degrees of freedom 
# Null hypothesis probability =   8.571612e-01
 
Photon flux (15-150 keV)    in 45.62 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.35783e-06 ( -1.35751e-06  -1.30934e-07 ) ergs/cm2
 
Single BB
 
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 14.0391  (-1.3058  1.47189)
R^2/D10^2   : 6.01446E-02  (-0.0184595   0.0259721)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          70.79 using 59 PHA bins.
# Reduced chi-squared =          1.242 for     57 degrees of freedom 
# Null hypothesis probability =   1.035735e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.142e-07   1.827e-08
25- 50  4.259e-07   4.731e-08
50-150  5.536e-07   9.204e-08
15-150  1.094e-06   1.004e-07
Thermal bremsstrahlung (OTTB)
 
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 157.601       (-47.7316      -157.635)
Norm        : 1.77240       (-0.166985     0.192904)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          44.95 using 59 PHA bins.
# Reduced chi-squared =         0.7886 for     57 degrees of freedom 
# Null hypothesis probability =   8.761178e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.068e-07   2.644e-08
25- 50  3.860e-07   9.336e-08
50-150  7.772e-07   3.320e-07
15-150  1.370e-06   4.489e-07
Double BB
 
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.73 using 59 PHA bins.
#Fit statistic : Chi-Squared =          54.58 using 59 PHA bins.
#Fit statistic : Chi-Squared =          45.45 using 59 PHA bins.
#Fit statistic : Chi-Squared =          45.43 using 59 PHA bins.
# Reduced chi-squared =         0.9951 for     55 degrees of freedom 
# Reduced chi-squared =         0.9924 for     55 degrees of freedom 
# Reduced chi-squared =         0.8264 for     55 degrees of freedom 
# Reduced chi-squared =         0.8260 for     55 degrees of freedom 
# Null hypothesis probability =   4.848975e-01
# Null hypothesis probability =   4.904761e-01
# Null hypothesis probability =   8.171443e-01
# Null hypothesis probability =   8.178165e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.020e-07   7.717e-08
25- 50  3.749e-07   5.458e-08
50-150  6.346e-07   1.072e-07
15-150  1.211e-06   1.626e-07
Peak spectrum fit
Power-law model
 
Time interval is from    2.084 sec. to    3.084 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.33568     ( -0.115636   0.115231 )
Norm@50keV  : 4.19178E-02    ( -0.0030472   0.00304719 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.39 using 59 PHA bins.
# Reduced chi-squared =         0.9893 for     57 degrees of freedom 
# Null hypothesis probability =   4.979451e-01
 
Photon flux (15-150 keV)    in 1 sec: 5.03525 ( -0.384238  0.385151 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.10738e-07 ( -3.16565e-08  3.1727e-08 ) ergs/cm2
 
Cutoff power-law model
 
Time interval is from    2.084 sec. to    3.084 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.207019     ( -0.656401   0.568719 )
Epeak [keV] : 85.6728      ( -14.3274 34.0318 )
Norm@50keV  : 0.143942    ( -0.0655772   0.145645 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.55 using 59 PHA bins.
# Reduced chi-squared =         0.7777 for     56 degrees of freedom 
# Null hypothesis probability =   8.873401e-01
 
Photon flux (15-150 keV)    in 1 sec: 4.85861 ( -0.39354  0.39442 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.93026e-07 ( -3.4199e-08  3.3942e-08 ) ergs/cm2
 
Band function
 
Time interval is from    2.084 sec. to    3.084 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 0.532516   ( -0.980901   3.99887 )
beta        : -1.93691    ( -1.00886   0.383986 )
Epeak [keV] : 64.2185      ( -21.3719 28.09 )
Norm@50keV   : 0.378001    ( -0.439967   112.341 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          40.66 using 59 PHA bins.
# Reduced chi-squared =         0.7393 for     55 degrees of freedom 
# Null hypothesis probability =   9.255293e-01
 
Photon flux (15-150 keV)    in 1 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.94766e-07 ( -3.94759e-07  -3.332e-08 ) ergs/cm2
 
Single BB
 
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 17.0729  (-1.31465  1.45934)
R^2/D10^2   : 0.403028  (-0.10107   0.130453)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.30 using 59 PHA bins.
# Reduced chi-squared =          1.023 for     57 degrees of freedom 
# Null hypothesis probability =   4.272216e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.390e-08   3.190e-09
25- 50  1.061e-07   1.041e-08
50-150  2.211e-07   2.865e-08
15-150  3.511e-07   3.130e-08
Thermal bremsstrahlung (OTTB)
 
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (      )
Norm        : 21.2660       (-1.55349     1.55329)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.12 using 59 PHA bins.
# Reduced chi-squared =          1.072 for     57 degrees of freedom 
# Null hypothesis probability =   3.304082e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.295e-08   4.770e-09
25- 50  1.019e-07   9.410e-09
50-150  2.234e-07   4.885e-08
15-150  3.782e-07   5.920e-08
Double BB
 
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 12.5762        (-3.06831      2.64109)
R1^2/D10^2  : 0.872536        (-0.35835      0.787216)
kT2 [keV]   : 47.2914        (-21.3278      -46.2485)
R2^2/D10^2  : 7.52063E-03    (   )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          40.26 using 59 PHA bins.
#Fit statistic : Chi-Squared =          40.24 using 59 PHA bins.
# Reduced chi-squared =         0.7321 for     55 degrees of freedom 
# Reduced chi-squared =         0.7317 for     55 degrees of freedom 
# Null hypothesis probability =   9.318328e-01
# Null hypothesis probability =   9.321581e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.145e-08   8.770e-09
25- 50  1.107e-07   3.171e-08
50-150  2.536e-07   1.159e-07
15-150  3.957e-07   1.569e-07
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: 1.53357     ( -0.10157   0.101833 )
Norm@50keV  : 1.24633E-02    ( -0.000751355   0.000751057 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.60 using 59 PHA bins.
# Reduced chi-squared =         0.8876 for     57 degrees of freedom 
# Null hypothesis probability =   7.125208e-01
 
Photon flux (15-150 keV)    in 10.6 sec: 1.57038 ( -0.1012  0.101529 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.2467e-06 ( -7.89146e-08  7.90858e-08 ) ergs/cm2
 
Cutoff power-law model
 
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.846474     ( -0.485624   0.437055 )
Epeak [keV] : 89.5289      ( -17.7433 62.1486 )
Norm@50keV  : 2.65302E-02    ( -0.00994182   0.0181302 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.03 using 59 PHA bins.
# Reduced chi-squared =         0.7684 for     56 degrees of freedom 
# Null hypothesis probability =   8.982001e-01
 
Photon flux (15-150 keV)    in 10.6 sec: 1.51897 ( -0.10566  0.10604 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.20618e-06 ( -8.4694e-08  8.41852e-08 ) ergs/cm2
 
Band function
 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.846411   ( -0.317989   0.454926 )
beta        : -10.0000    ( 10   3.55271e-15 )
Epeak [keV] : 89.5111      ( -13.5644 62.1365 )
Norm@50keV   : 2.65307E-02    ( -0.00993818   0.0181505 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.03 using 59 PHA bins.
# Reduced chi-squared =         0.7823 for     55 degrees of freedom 
# Null hypothesis probability =   8.793858e-01
 
Photon flux (15-150 keV)    in 10.6 sec: 1.52327 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.20525e-06 ( -1.20518e-06  -8.27118e-08 ) ergs/cm2
 
 S(25-50 keV) vs. S(50-100 keV) plot 
 
S(25-50 keV)  = 3.71e-07
S(50-100 keV) = 4.74e-07
 T90 vs. Hardness ratio plot 
 
T90                                   = 43.5719999074936 sec.
Hardness ratio (energy fluence ratio) = 1.27763
 Color vs. Color plot 
 
Count Ratio  (25-50 keV) / (15-25 keV) = 1.48254
Count Ratio (50-100 keV) / (15-25 keV) = 1.03717
 Mask shadow pattern 
 
IMX = -1.084240024452158E+00, IMY = 3.073460639511227E-01
 TIME vs. PHA plot around the trigger time 
 
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.512000
 TIME vs. DetID plot around the trigger time 
 
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.512000
 100 us light curve (15-350 keV)
 
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.512000
 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:
-176.459390 0.140000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
244.9709 -15.6435    1.6  53.9  160.7   5.4327   7.2    0.5	Sco X-1                       
254.4403  35.2967    0.9   5.3   96.3   1.4428  12.5    2.9	Her X-1                       
268.2035  -1.4397   18.5  43.4  127.3  -0.3675  -0.6    9.9	SW J1753.5-0127               
299.4916  35.0793    6.6  40.3   54.4   0.7115   1.7    8.8	Cyg X-1                       
308.1693  40.9890    7.4  45.0   43.0   0.6965   1.5    3.5	Cyg X-3                       
 Pre-slew background subtracted image of 15-350 keV band 
Time interval of the image:
0.140000 10.740590
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
244.8434 -15.7381    8.5  54.0  160.9  -0.2693  -1.4    9.8	Sco X-1                       
254.4039  35.2763    7.5   5.3   96.7   0.0437   1.5    4.8	Her X-1                       
268.4650  -1.5017    5.2  43.6  127.0  -0.3341  -2.2    6.5	SW J1753.5-0127               
299.5898  35.2008   27.8  40.4   54.2   0.0412   0.4    0.1	Cyg X-1                       
308.0246  40.7695   29.3  45.0   43.3   0.0437   0.4   11.7	Cyg X-3                       
260.2502   7.9378    2.9  31.9  134.3   0.2046   4.0 ------	UNKNOWN                       
220.2552  -2.4968    0.4  48.4 -164.2   1.9890  27.2 ------	UNKNOWN                       
199.2534  67.7489    3.0  40.1  -50.3   0.2421   3.8 ------	UNKNOWN                       
169.3358  77.9475    2.9  50.7  -39.2   0.4843   4.0 ------	UNKNOWN                       
 Post-slew image of 15-350 keV band 
Time interval of the image:
74.340610 671.240600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
244.9786 -15.6468    0.3  27.7  102.6  26.0873  44.6    0.4	Sco X-1                       
254.5006  35.3162    2.5  49.5   19.8   5.0309   4.6    2.6	Her X-1                       
250.2507 -22.9690    2.5  35.6  110.4   4.0476   4.6 ------	UNKNOWN                       
243.5672  -5.0752    2.5  23.4   79.8   2.2583   4.7 ------	UNKNOWN                       
224.6453 -39.6817    2.9  37.4  157.1   2.7445   4.0 ------	UNKNOWN                       
236.9861  32.4791    2.9  38.4    5.7   2.1202   3.9 ------	UNKNOWN                       
173.1245 -43.9840    6.9  58.7 -159.3   6.0185   1.7 ------	UNKNOWN                       
192.1268  41.3406    4.3  50.7  -44.6   6.0552   2.7 ------	UNKNOWN                       
Plot creation:
Sat May 30 16:00:14 EDT 2015