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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
282.0313 61.9277 0.0166 15.9611 -38.3848 1.0502762 11.512 TRIG_00454473
Foreground time interval of the image:
-48.864 17.376 (delta_t = 66.240 [sec])
Background time interval of the image:
-234.795 -48.864 (delta_t = 185.931 [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 8.192000
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 8.192000
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 8.192000
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 -48.864 sec. to 17.376 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.86893 ( -0.268998 0.287469 )
Norm@50keV : 7.96516E-04 ( -0.00014629 0.000140808 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.71 using 59 PHA bins.
# Reduced chi-squared = 1.065 for 57 degrees of freedom
# Null hypothesis probability = 3.435935e-01
Photon flux (15-150 keV) in 66.24 sec: 0.112830 ( -0.0156716 0.0156715 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.85044e-07 ( -8.59583e-08 8.91981e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -48.864 sec. to 17.376 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.87225 ( -0.836863 1.1437 )
Epeak [keV] : 852.931 ( )
Norm@50keV : 7.91467E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.71 using 59 PHA bins.
# Reduced chi-squared = 1.084 for 56 degrees of freedom
# Null hypothesis probability = 3.098905e-01
Photon flux (15-150 keV) in 66.24 sec: 0.112781 ( -0.0156661 0.015669 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.83066e-07 ( -9.12893e-08 8.93207e-08 ) ergs/cm2
Band function
Time interval is from -48.864 sec. to 17.376 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.80645 ( -4.80645 -4.80645 )
beta : -1.91313 ( -0.327335 0.288026 )
Epeak [keV] : 18.8388 ( -18.8388 6.34125 )
Norm@50keV : 505.577 ( -70.142 963548 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.40 using 59 PHA bins.
# Reduced chi-squared = 1.098 for 55 degrees of freedom
# Null hypothesis probability = 2.871790e-01
Photon flux (15-150 keV) in 66.24 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] : 9.38139 (-1.61896 2.04274)
R^2/D10^2 : 6.52294E-02 (-0.0340915 0.0691016)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 76.23 using 59 PHA bins.
# Reduced chi-squared = 1.337 for 57 degrees of freedom
# Null hypothesis probability = 4.531644e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.553e-08 1.833e-08
25- 50 1.711e-07 3.474e-08
50-150 7.400e-08 2.994e-08
15-150 3.206e-07 7.038e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 84.4232 (-35.1851 93.4714)
Norm : 0.518046 (-0.100205 0.137647)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.29 using 59 PHA bins.
# Reduced chi-squared = 1.093 for 57 degrees of freedom
# Null hypothesis probability = 2.934420e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.931e-08 1.586e-08
25- 50 1.489e-07 2.785e-08
50-150 2.178e-07 1.296e-07
15-150 4.560e-07 1.546e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.40581 (-2.32928 2.51714)
R1^2/D10^2 : 0.391064 (-0.159597 0.749618)
kT2 [keV] : 22.6227 (-14.6494 111.292)
R2^2/D10^2 : 1.72723E-03 (-0.000581957 0.00496029)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.71 using 59 PHA bins.
# Reduced chi-squared = 1.122 for 55 degrees of freedom
# Null hypothesis probability = 2.488482e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.592e-08 5.597e-08
25- 50 1.246e-07 6.929e-08
50-150 2.238e-07 1.404e-07
15-150 4.443e-07 2.458e-07
Peak spectrum fit
Power-law model
Time interval is from 1.028 sec. to 2.028 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.25195 ( -0.584744 0.574446 )
Norm@50keV : 3.65199E-03 ( -0.00105236 0.00104891 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.35 using 59 PHA bins.
# Reduced chi-squared = 0.8832 for 57 degrees of freedom
# Null hypothesis probability = 7.211345e-01
Photon flux (15-150 keV) in 1 sec: 0.432066 ( -0.127054 0.127565 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.65305e-08 ( -1.19225e-08 1.22308e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.028 sec. to 2.028 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.25027 ( -1.24389 0.57652 )
Epeak [keV] : 9999.35 ( -9999.36 -9999.36 )
Norm@50keV : 3.66751E-03 ( -0.00105854 0.0148699 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.35 using 59 PHA bins.
# Reduced chi-squared = 0.8991 for 56 degrees of freedom
# Null hypothesis probability = 6.877685e-01
Photon flux (15-150 keV) in 1 sec: 0.433082 ( -0.12868 0.126432 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.65959e-08 ( -1.19981e-08 1.20211e-08 ) ergs/cm2
Band function
Time interval is from 1.028 sec. to 2.028 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -3.89981 ( 3.98509 3.89981 )
beta : -1.25191 ( -0.574533 0.585595 )
Epeak [keV] : 627.111 ( -627.111 -627.111 )
Norm@50keV : 0.496357 ( -0.143102 0.142562 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.35 using 59 PHA bins.
# Reduced chi-squared = 0.9154 for 55 degrees of freedom
# Null hypothesis probability = 6.528098e-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] : 23.0123 (-8.67191 15.3597)
R^2/D10^2 : 1.22183E-02 (-0.0121874 0.0431315)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.58 using 59 PHA bins.
# Reduced chi-squared = 0.9575 for 57 degrees of freedom
# Null hypothesis probability = 5.664889e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.172e-09 7.620e-10
25- 50 6.362e-09 3.934e-09
50-150 2.517e-08 1.602e-08
15-150 3.270e-08 2.063e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.359 (-114.378 -199.362)
Norm : 1.77325 (-0.517182 0.518462)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.53 using 59 PHA bins.
# Reduced chi-squared = 0.9040 for 57 degrees of freedom
# Null hypothesis probability = 6.796505e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.415e-09 2.759e-09
25- 50 8.494e-09 5.225e-09
50-150 1.863e-08 1.129e-08
15-150 3.154e-08 1.934e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.36259 (-3.48026 4.48074)
R1^2/D10^2 : 1.24163 (-1.13241 314.021)
kT2 [keV] : 32.9866 (-13.3787 58.2439)
R2^2/D10^2 : 3.64568E-03 (-0.00331148 0.00688708)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.72 using 59 PHA bins.
# Reduced chi-squared = 0.8858 for 55 degrees of freedom
# Null hypothesis probability = 7.118595e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.548e-09 2.869e-09
25- 50 6.805e-09 3.649e-09
50-150 2.771e-08 1.742e-08
15-150 3.906e-08 2.187e-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: 1.86893 ( -0.268998 0.287469 )
Norm@50keV : 7.96516E-04 ( -0.00014629 0.000140808 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.71 using 59 PHA bins.
# Reduced chi-squared = 1.065 for 57 degrees of freedom
# Null hypothesis probability = 3.435935e-01
Photon flux (15-150 keV) in 66.24 sec: 0.112830 ( -0.0156716 0.0156715 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.85044e-07 ( -8.59583e-08 8.91981e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.87225 ( -0.836863 1.1437 )
Epeak [keV] : 852.931 ( )
Norm@50keV : 7.91467E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.71 using 59 PHA bins.
# Reduced chi-squared = 1.084 for 56 degrees of freedom
# Null hypothesis probability = 3.098905e-01
Photon flux (15-150 keV) in 66.24 sec: 0.112781 ( -0.0156661 0.015669 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.83066e-07 ( -9.12893e-08 8.93207e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.80645 ( -4.80645 -4.80645 )
beta : -1.91313 ( -0.327335 0.288026 )
Epeak [keV] : 18.8388 ( -18.8388 6.34125 )
Norm@50keV : 505.577 ( -70.142 963548 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.40 using 59 PHA bins.
# Reduced chi-squared = 1.098 for 55 degrees of freedom
# Null hypothesis probability = 2.871790e-01
Photon flux (15-150 keV) in 66.24 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) = 1.40e-07
S(50-100 keV) = 1.53e-07
T90 vs. Hardness ratio plot
T90 = 55.7280000448227 sec.
Hardness ratio (energy fluence ratio) = 1.09286
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.1362
Count Ratio (50-100 keV) / (15-25 keV) = 0.598002
Mask shadow pattern
IMX = 2.241918560127483E-01, IMY = 1.775956978590825E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 8.192000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 8.192000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 8.192000
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:
-234.795400 -48.864000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.4688 35.4925 9.3 22.2 73.3 0.2514 1.2 9.0 Her X-1
299.5766 35.1908 0.7 39.0 4.1 4.2328 16.6 0.9 Cyg X-1
308.0822 40.9489 3.1 39.2 -9.9 0.8910 3.7 1.3 Cyg X-3
326.2625 38.5218 0.0 50.7 -21.8 -0.2783 -0.7 12.7 Cyg X-2
229.4101 21.3184 3.0 39.6 113.3 2.5035 3.8 ------ UNKNOWN
186.5151 49.1619 2.4 38.0 -173.6 1.1739 4.8 ------ UNKNOWN
307.9839 37.5681 2.5 41.6 -6.2 1.2557 4.7 ------ UNKNOWN
159.2817 46.5741 4.2 53.1 -158.8 1.2844 2.8 ------ UNKNOWN
344.3127 50.6594 3.1 50.6 -44.7 3.1240 3.7 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-48.864000 17.376000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.4343 35.3444 69.7 22.3 73.5 0.0202 0.2 1.1 Her X-1
299.6110 35.0193 7.6 39.1 4.2 -0.2309 -1.5 11.0 Cyg X-1
308.1278 41.1507 0.0 39.1 -10.2 -0.3043 -2.2 11.9 Cyg X-3
326.3078 38.3148 5.5 50.8 -21.7 -0.4846 -2.1 6.4 Cyg X-2
260.5288 24.8397 2.3 33.4 64.9 1.0474 5.1 ------ UNKNOWN
297.3678 18.3983 2.4 51.8 19.8 1.9218 4.8 ------ UNKNOWN
282.0312 61.9277 1.0 16.0 -38.4 1.0504 11.5 ------ UNKNOWN
316.5259 38.4889 2.6 45.5 -14.3 0.7585 4.5 ------ UNKNOWN
146.8463 64.5937 2.1 45.2 -135.5 1.2421 5.6 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
417.904620 962.437300
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.4696 35.3290 18.8 31.7 104.0 0.4588 0.6 1.0 Her X-1
299.5756 35.1851 0.5 28.9 27.5 10.8137 24.2 1.2 Cyg X-1
308.0802 40.9418 1.4 26.2 9.3 3.1863 8.0 1.5 Cyg X-3
326.2086 38.3033 10.9 35.7 -11.3 0.5115 1.0 2.1 Cyg X-2
195.0475 39.8459 2.5 54.3 167.3 8.7778 4.7 ------ UNKNOWN
249.8494 55.3593 3.4 17.8 141.1 1.4152 3.4 ------ UNKNOWN
326.9327 40.7509 2.9 34.0 -14.6 1.8236 3.9 ------ UNKNOWN
141.4894 59.0790 3.5 55.2 -145.3 12.3317 3.4 ------ UNKNOWN
140.7748 59.2445 7.2 55.2 -144.8 5.6084 1.7 ------ UNKNOWN
Plot creation:
Sat May 30 22:13:19 EDT 2015