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
   81.3274    32.4885   0.0045    44.8609  -159.5211         6.3778061     43.079 TRIG_00586071                 
 
Foreground time interval of the image:
  0.152  27.624 (delta_t =  27.472 [sec])
Background time interval of the image:
-375.203 -322.332 (delta_t =  52.871 [sec])
-239.504   0.152 (delta_t = 239.656 [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)
 
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    0.152 sec. to   27.624 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.42939     ( -0.0629735   0.0628625 )
Norm@50keV  : 1.57204E-02    ( -0.000552818   0.00055273 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.37 using 59 PHA bins.
# Reduced chi-squared =         0.9188 for     57 degrees of freedom 
# Null hypothesis probability =   6.490061e-01
 
Photon flux (15-150 keV)    in 27.47 sec: 1.92762 ( -0.0749455  0.07517 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.14846e-06 ( -1.51773e-07  1.51915e-07 ) ergs/cm2
 
Cutoff power-law model
 
Time interval is from    0.152 sec. to   27.624 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.16201     ( -0.262499   0.248105 )
Epeak [keV] : 178.253      ( -60.8906 1068.01 )
Norm@50keV  : 2.07227E-02    ( -0.00456411   0.00623632 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.99 using 59 PHA bins.
# Reduced chi-squared =         0.8748 for     56 degrees of freedom 
# Null hypothesis probability =   7.352638e-01
 
Photon flux (15-150 keV)    in 27.47 sec: 1.89603 ( -0.07987  0.08028 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.10119e-06 ( -1.59766e-07  1.59244e-07 ) ergs/cm2
 
Band function
 
Time interval is from    0.152 sec. to   27.624 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.17570   ( -0.0952509   0.164762 )
beta        : -9.35460    ( 9.36969   19.3697 )
Epeak [keV] : 185.374      ( -39.2394 230.127 )
Norm@50keV   : 2.04141E-02    ( -0.000716466   0.00595393 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.00 using 59 PHA bins.
# Reduced chi-squared =         0.8908 for     55 degrees of freedom 
# Null hypothesis probability =   7.020996e-01
 
Photon flux (15-150 keV)    in 27.47 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]    : 18.1653  (  )
R^2/D10^2   : 0.113492  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         210.39 using 59 PHA bins.
# Reduced chi-squared =         3.6910 for     57 degrees of freedom 
# Null hypothesis probability =   1.954641e-19
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.054e-07   1.498e-08
25- 50  9.563e-07   5.109e-08
50-150  2.296e-06   1.303e-07
15-150  3.457e-06   1.456e-07
Thermal bremsstrahlung (OTTB)
 
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (      )
Norm        : 8.06888       (-0.284385     0.28431)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.73 using 59 PHA bins.
# Reduced chi-squared =          1.171 for     57 degrees of freedom 
# Null hypothesis probability =   1.772911e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.521e-07   2.143e-08
25- 50  1.062e-06   4.244e-08
50-150  2.329e-06   9.175e-08
15-150  3.943e-06   1.525e-07
Double BB
 
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.10882        (-1.006      1.14909)
R1^2/D10^2  : 1.68627        (-0.667337      1.24341)
kT2 [keV]   : 27.2590        (-2.68185      3.71996)
R2^2/D10^2  : 2.33083E-02    (-0.00867561   0.0109178)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.63 using 59 PHA bins.
# Reduced chi-squared =         0.9569 for     55 degrees of freedom 
# Null hypothesis probability =   5.656806e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.608e-07   6.991e-08
25- 50  1.005e-06   8.900e-08
50-150  2.619e-06   2.404e-07
15-150  4.085e-06   3.090e-07
Peak spectrum fit
Power-law model
 
Time interval is from    1.692 sec. to    2.692 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.22966     ( -0.0431811   0.0430742 )
Norm@50keV  : 0.325954    ( -0.00835745   0.00835286 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.65 using 59 PHA bins.
# Reduced chi-squared =          1.029 for     57 degrees of freedom 
# Null hypothesis probability =   4.146372e-01
 
Photon flux (15-150 keV)    in 1 sec: 38.4277 ( -1.05287  1.05436 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.2799e-06 ( -8.69858e-08  8.70318e-08 ) ergs/cm2
 
Cutoff power-law model
 
Time interval is from    1.692 sec. to    2.692 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.739282     ( -0.189512   0.182245 )
Epeak [keV] : 152.383      ( -26.4766 53.6952 )
Norm@50keV  : 0.532085    ( -0.0864664   0.107242 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          36.28 using 59 PHA bins.
# Reduced chi-squared =         0.6479 for     56 degrees of freedom 
# Null hypothesis probability =   9.810974e-01
 
Photon flux (15-150 keV)    in 1 sec: 37.5933 ( -1.0858  1.0886 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.24085e-06 ( 0  0 ) ergs/cm2
 
Band function
 
Time interval is from    1.692 sec. to    2.692 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.290797   ( -0.616709   1.36193 )
beta        : -1.43564    ( 1.43352   0.11062 )
Epeak [keV] : 85.9866      ( -37.2037 114.54 )
Norm@50keV   : 0.969261    ( -0.553075   6.88336 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          35.84 using 59 PHA bins.
# Reduced chi-squared =         0.6515 for     55 degrees of freedom 
# Null hypothesis probability =   9.788873e-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]    : 20.2574  (  )
R^2/D10^2   : 1.72270  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         271.20 using 59 PHA bins.
# Reduced chi-squared =         4.7579 for     57 degrees of freedom 
# Null hypothesis probability =   1.217851e-29
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.356e-07   6.900e-09
25- 50  6.811e-07   2.495e-08
50-150  2.075e-06   8.100e-08
15-150  2.892e-06   7.950e-08
Thermal bremsstrahlung (OTTB)
 
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (      )
Norm        : 163.902       (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         221.01 using 59 PHA bins.
# Reduced chi-squared =         3.8773 for     57 degrees of freedom 
# Null hypothesis probability =   3.679039e-21
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.081e-07   1.085e-08
25- 50  7.851e-07   2.150e-08
50-150  1.722e-06   4.500e-08
15-150  2.915e-06   7.700e-08
Double BB
 
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 9.14927        (-1.01018      1.09839)
R1^2/D10^2  : 12.8029        (-3.48647      5.32511)
kT2 [keV]   : 32.2967        (-3.00156      4.17875)
R2^2/D10^2  : 0.292162    (-0.101753   0.123894)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          34.87 using 59 PHA bins.
# Reduced chi-squared =         0.6340 for     55 degrees of freedom 
# Null hypothesis probability =   9.844311e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.559e-07   2.615e-08
25- 50  7.478e-07   4.595e-08
50-150  2.245e-06   1.640e-07
15-150  3.249e-06   2.030e-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: 1.42939     ( -0.0629735   0.0628625 )
Norm@50keV  : 1.57204E-02    ( -0.000552818   0.00055273 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.37 using 59 PHA bins.
# Reduced chi-squared =         0.9188 for     57 degrees of freedom 
# Null hypothesis probability =   6.490061e-01
 
Photon flux (15-150 keV)    in 27.47 sec: 1.92762 ( -0.0749455  0.07517 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.14846e-06 ( -1.51773e-07  1.51915e-07 ) ergs/cm2
 
Cutoff power-law model
 
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.16201     ( -0.262499   0.248105 )
Epeak [keV] : 178.253      ( -60.8906 1068.01 )
Norm@50keV  : 2.07227E-02    ( -0.00456411   0.00623632 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.99 using 59 PHA bins.
# Reduced chi-squared =         0.8748 for     56 degrees of freedom 
# Null hypothesis probability =   7.352638e-01
 
Photon flux (15-150 keV)    in 27.47 sec: 1.89603 ( -0.07987  0.08028 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.10119e-06 ( -1.59766e-07  1.59244e-07 ) ergs/cm2
 
Band function
 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.17570   ( -0.0952509   0.164762 )
beta        : -9.35460    ( 9.36969   19.3697 )
Epeak [keV] : 185.374      ( -39.2394 230.023 )
Norm@50keV   : 2.04141E-02    ( -0.000716466   0.00595393 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.00 using 59 PHA bins.
# Reduced chi-squared =         0.8908 for     55 degrees of freedom 
# Null hypothesis probability =   7.020996e-01
 
Photon flux (15-150 keV)    in 27.47 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)  = 9.90e-07
S(50-100 keV) = 1.47e-06
 T90 vs. Hardness ratio plot 
 
T90                                   = 20.432000041008 sec.
Hardness ratio (energy fluence ratio) = 1.48485
 Color vs. Color plot 
 
Count Ratio  (25-50 keV) / (15-25 keV) = 1.57783
Count Ratio (50-100 keV) / (15-25 keV) = 1.44803
 Mask shadow pattern 
 
IMX = -9.322627058378252E-01, IMY = 3.481684036310416E-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:
-375.203410 -322.332200
-239.504000 0.152000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6266  22.0095    0.6  50.4 -171.9  11.9818  18.3    0.5	Crab                          
115.8749  40.4632    2.6  17.7 -179.1   1.1101   4.4 ------	UNKNOWN                       
 Pre-slew background subtracted image of 15-350 keV band 
Time interval of the image:
0.152000 27.624000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6289  21.8250    0.0  50.5 -172.1   0.2378   1.1   11.4	Crab                          
139.2645   9.1754    2.4  39.4  107.9   1.3863   4.8 ------	UNKNOWN                       
157.4625  28.5758    2.2  24.9   65.9   0.5421   5.2 ------	UNKNOWN                       
190.5623  29.8086    2.6  43.8   25.2   0.7146   4.4 ------	UNKNOWN                       
 94.2929   8.5477    2.9  54.2  167.2   1.6855   4.0 ------	UNKNOWN                       
114.4034  45.7126    2.4  16.3 -161.3   0.3633   4.8 ------	UNKNOWN                       
 81.3274  32.4885    0.3  44.9 -159.5   6.3777  43.1 ------	UNKNOWN                       
 70.4680  26.3525    2.2  56.0 -157.6   1.8459   5.3 ------	UNKNOWN                       
 63.3025  37.7057    2.1  53.4 -142.2   2.2706   5.4 ------	UNKNOWN                       
 Post-slew image of 15-350 keV band 
Time interval of the image:
466.896600 722.646000
900.496000 962.567900
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
244.8271 -15.6195    5.0  24.3   63.3   8.4976   2.3    8.9	Sco X-1                       
254.3807  35.3569    6.1  47.4  152.9 -19.7876  -1.9    3.9	Her X-1                       
256.0303 -38.0119  178.0  30.4    9.8   0.2101   0.1   10.3	4U 1700-377                   
256.4524 -36.4299    5.4  28.8   10.6  -6.8057  -2.1    0.9	GX 349+2                      
263.0813 -24.7537   10.0  15.8    9.5   3.1960   1.2    4.0	GX 1+4                        
264.5637 -44.5760    7.1  34.8   -5.2   5.9202   1.6   10.8	4U 1735-44                    
268.2187  -1.4426    6.5   8.6  163.5  -5.1257  -1.8    9.0	SW J1753.5-0127               
270.1483 -24.9517   10.1  15.0  -14.6  -3.2417  -1.1   10.6	GX 5-1                        
270.1354 -25.8238    4.9  15.9  -14.3   6.5279   2.4   10.2	GRS 1758-258                  
273.9523 -13.9625    5.2   6.2  -60.5   6.7260   2.2    5.4	GX 17+2                       
275.9011 -30.2156    5.8  21.2  -27.3   6.0130   2.0    9.2	H1820-303                     
284.9110 -24.7687   10.1  21.1  -54.3   3.6429   1.1   11.4	HT1900.1-2455                 
288.7259  10.8141   20.6  28.5 -147.1  -2.0419  -0.6    9.0	GRS 1915+105                  
299.7056  35.2258   11.2  53.7 -159.7 -10.2409  -1.0    5.8	Cyg X-1                       
262.9925 -33.8340   29.1  24.5    1.5  -1.2851  -0.4    0.2	GX 354-0                      
229.6578  -7.0049    3.3  39.1   80.4  44.0240   3.5 ------	UNKNOWN                       
233.4884 -19.6604    2.8  35.7   59.3  26.2445   4.1 ------	UNKNOWN                       
236.8420 -27.1063    3.2  34.9   45.4  18.5416   3.6 ------	UNKNOWN                       
274.3514 -22.1354    2.8  13.2  -32.8  11.9053   4.1 ------	UNKNOWN                       
259.8167 -66.3876    2.5  56.8   -6.4  56.0883   4.6 ------	UNKNOWN                       
284.8201 -68.5502    3.7  59.5  -17.4  59.9582   3.1 ------	UNKNOWN                       
	UNKNOWN                       
	UNKNOWN                       
Plot creation:
Sat May 30 14:28:29 EDT 2015