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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
76.6117 -84.7042 0.0268 30.3790 -0.1810 0.3303993 7.195 TRIG_00510736
Foreground time interval of the image:
-0.972 11.901 (delta_t = 12.873 [sec])
Background time interval of the image:
-239.000 -0.972 (delta_t = 238.028 [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 -0.972 sec. to 26.260 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.83262 ( -0.317734 0.342637 )
Norm@50keV : 1.34065E-03 ( -0.00028331 0.000271607 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.99 using 59 PHA bins.
# Reduced chi-squared = 0.8595 for 57 degrees of freedom
# Null hypothesis probability = 7.658039e-01
Photon flux (15-150 keV) in 27.23 sec: 0.187127 ( -0.0324712 0.0324879 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.35765e-07 ( -6.94014e-08 7.13843e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.972 sec. to 26.260 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.81782 ( -1.23049 0.674577 )
Epeak [keV] : 535.695 ( )
Norm@50keV : 1.36638E-03 ( -0.00136927 0.00525422 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.99 using 59 PHA bins.
# Reduced chi-squared = 0.8748 for 56 degrees of freedom
# Null hypothesis probability = 7.351641e-01
Photon flux (15-150 keV) in 27.23 sec: 0.187051 ( -0.033477 0.032435 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.34515e-07 ( -7.5569e-08 7.21922e-08 ) ergs/cm2
Band function
Time interval is from -0.972 sec. to 26.260 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -2.90472 ( 3.28998 2.90472 )
beta : -1.83262 ( -0.342637 0.317766 )
Epeak [keV] : 69.6206 ( -69.6206 -69.6206 )
Norm@50keV : 0.182213 ( -0.0385058 0.0369154 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.99 using 59 PHA bins.
# Reduced chi-squared = 0.8908 for 55 degrees of freedom
# Null hypothesis probability = 7.022690e-01
Photon flux (15-150 keV) in 27.23 sec: 0.187319 ( ) 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] : 11.5135 (-2.81118 3.65067)
R^2/D10^2 : 5.04414E-02 (-0.031791 0.0919744)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.04 using 59 PHA bins.
# Reduced chi-squared = 1.071 for 57 degrees of freedom
# Null hypothesis probability = 3.330566e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.833e-08 1.459e-08
25- 50 1.148e-07 3.460e-08
50-150 8.892e-08 3.642e-08
15-150 2.420e-07 6.825e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 98.7582 (-46.1202 -98.7582)
Norm : 0.824985 (-0.17039 0.259663)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.54 using 59 PHA bins.
# Reduced chi-squared = 0.8692 for 57 degrees of freedom
# Null hypothesis probability = 7.480516e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.871e-08 1.430e-08
25- 50 1.013e-07 2.428e-08
50-150 1.629e-07 1.101e-07
15-150 3.229e-07 1.420e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.06167 (-2.10229 2.59334)
R1^2/D10^2 : 0.802845 (-0.63698 8.63746)
kT2 [keV] : 21.1330 (-6.81266 16.732)
R2^2/D10^2 : 4.40826E-03 (-0.00374654 0.00712411)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.45 using 59 PHA bins.
# Reduced chi-squared = 0.8809 for 55 degrees of freedom
# Null hypothesis probability = 7.214459e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.593e-08 3.699e-08
25- 50 8.970e-08 4.858e-08
50-150 1.752e-07 1.055e-07
15-150 3.308e-07 1.754e-07
Peak spectrum fit
Power-law model
Time interval is from 0.120 sec. to 1.120 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.64863 ( -0.317629 0.333418 )
Norm@50keV : 7.41028E-03 ( -0.00151282 0.00147495 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.25 using 59 PHA bins.
# Reduced chi-squared = 0.7587 for 57 degrees of freedom
# Null hypothesis probability = 9.107624e-01
Photon flux (15-150 keV) in 1 sec: 0.967164 ( -0.180306 0.180462 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.8928e-08 ( -1.46914e-08 1.50018e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.120 sec. to 1.120 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.38086 ( -1.49871 0.590239 )
Epeak [keV] : 108.560 ( -108.563 -108.563 )
Norm@50keV : 1.03266E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.10 using 59 PHA bins.
# Reduced chi-squared = 0.7696 for 56 degrees of freedom
# Null hypothesis probability = 8.967816e-01
Photon flux (15-150 keV) in 1 sec: 0.958684 ( -0.184547 0.092076 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.74751e-08 ( -1.63358e-08 1.6061e-08 ) ergs/cm2
Band function
Time interval is from 0.120 sec. to 1.120 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.995187 ( 0.996202 5.99462 )
beta : -1.83808 ( 1.84292 0.493082 )
Epeak [keV] : 59.3419 ( -57.9794 -57.9794 )
Norm@50keV : 1.81908E-02 ( -0.0188201 692.299 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.95 using 59 PHA bins.
# Reduced chi-squared = 0.7809 for 55 degrees of freedom
# Null hypothesis probability = 8.811445e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 6.76739e-08 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 12.4613 (-2.73923 3.69367)
R^2/D10^2 : 0.206563 (-0.125408 0.299944)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.29 using 59 PHA bins.
# Reduced chi-squared = 0.8822 for 57 degrees of freedom
# Null hypothesis probability = 7.231759e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.800e-09 2.685e-09
25- 50 2.235e-08 6.370e-09
50-150 2.138e-08 9.935e-09
15-150 5.053e-08 1.833e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 155.078 (-84.5504 -153.566)
Norm : 3.99224 (-0.786372 1.1056)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.11 using 59 PHA bins.
# Reduced chi-squared = 0.7564 for 57 degrees of freedom
# Null hypothesis probability = 9.131386e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.022e-08 5.840e-09
25- 50 1.904e-08 1.057e-08
50-150 3.810e-08 2.335e-08
15-150 6.736e-08 3.859e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.40161 (-3.86985 4.17392)
R1^2/D10^2 : 0.972233 (-0.733168 1.16926)
kT2 [keV] : 28.4918 (-18.8632 -28.5175)
R2^2/D10^2 : 7.69944E-03 (-0.00761409 0.0185779)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.10 using 59 PHA bins.
# Reduced chi-squared = 0.7837 for 55 degrees of freedom
# Null hypothesis probability = 8.777055e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.004e-08 5.855e-09
25- 50 1.984e-08 1.085e-08
50-150 3.833e-08 2.274e-08
15-150 6.822e-08 3.428e-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: 1.94320 ( -0.382779 0.423302 )
Norm@50keV : 1.59808E-03 ( -0.000431521 0.00040884 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.18 using 59 PHA bins.
# Reduced chi-squared = 0.8101 for 57 degrees of freedom
# Null hypothesis probability = 8.467521e-01
Photon flux (15-150 keV) in 12.87 sec: 0.233664 ( -0.0475493 0.0475531 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.89235e-07 ( -4.71455e-08 4.92102e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.94768 ( -1.36187 1.42591 )
Epeak [keV] : 383.406 ( )
Norm@50keV : 1.58563E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.18 using 59 PHA bins.
# Reduced chi-squared = 0.8246 for 56 degrees of freedom
# Null hypothesis probability = 8.223967e-01
Photon flux (15-150 keV) in 12.87 sec: 0.233640 ( -0.047597 0.047511 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.88199e-07 ( -5.06846e-08 4.93873e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.69329 ( -4.69329 -4.69329 )
beta : -2.07875 ( -0.602708 0.454179 )
Epeak [keV] : 22.0471 ( -22.0471 7.82845 )
Norm@50keV : 328.451 ( -66.6142 2.63587e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.83 using 59 PHA bins.
# Reduced chi-squared = 0.8332 for 55 degrees of freedom
# Null hypothesis probability = 8.062104e-01
Photon flux (15-150 keV) in 12.87 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) = 9.57e-08
S(50-100 keV) = 1.07e-07
T90 vs. Hardness ratio plot
T90 = 25.3719999194145 sec.
Hardness ratio (energy fluence ratio) = 1.11808
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.18439
Count Ratio (50-100 keV) / (15-25 keV) = 0.747285
Mask shadow pattern
IMX = 5.862015600200567E-01, IMY = 1.852211076233686E-03
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:
-239.000000 -0.972000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.2653 -60.6190 1.6 13.3 77.3 1.5193 7.0 1.5 Cen X-3
186.7263 -62.7563 1.3 5.2 75.2 1.8965 9.2 2.1 GX 301-2
171.3987 -24.2229 2.6 42.4 133.3 3.0626 4.4 ------ UNKNOWN
118.3039 -55.7435 2.4 38.8 53.2 2.6672 4.8 ------ UNKNOWN
124.3455 -60.9452 2.8 33.0 49.8 1.5236 4.1 ------ UNKNOWN
202.9550 -66.0706 2.3 3.9 -38.4 0.9405 5.0 ------ UNKNOWN
248.4784 -47.3543 1.9 31.5 -104.3 1.9377 6.0 ------ UNKNOWN
230.2174 -14.6761 2.3 53.0 -149.2 3.9125 5.0 ------ UNKNOWN
238.8153 -28.9058 2.5 42.8 -132.0 2.1561 4.5 ------ UNKNOWN
332.2565 -61.5810 3.2 51.0 -35.2 2.3430 3.6 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-0.972000 11.900600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.2867 -60.6119 1767.6 13.3 77.3 0.0002 0.0 1.1 Cen X-3
186.7170 -62.9384 4.7 5.2 73.2 0.0954 2.4 10.2 GX 301-2
76.6121 -84.7043 1.6 30.4 -0.2 0.3304 7.2 ------ UNKNOWN
211.9591 -62.1576 2.4 6.4 -97.9 0.2003 4.9 ------ UNKNOWN
224.0994 -12.0924 2.3 53.9 -157.2 0.6268 4.9 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
67.300600 833.300650
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.1692 -60.6055 2.0 30.2 171.7 3.3236 5.9 4.4 Cen X-3
186.5867 -62.7756 1.2 29.5 -172.1 5.2455 9.7 1.9 GX 301-2
160.3639 -59.5240 2.2 30.4 161.8 3.3423 5.2 ------ UNKNOWN
280.2776 -57.6510 3.3 37.2 -90.3 4.7286 3.6 ------ UNKNOWN
Plot creation:
Sat May 30 20:46:32 EDT 2015