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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
358.4903 65.9339 0.0036 25.2695 153.6072 8.2747609 53.778 TRIG_00102861
Foreground time interval of the image:
4.288 117.709 (delta_t = 113.421 [sec])
Background time interval of the image:
-299.392 4.288 (delta_t = 303.680 [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
8 ms binning
From T100_start-3 s to T100_start+3 s
2 ms binning
From T100_start-1 s to T100_start+1 s
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 4.288 sec. to 215.860 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.51866 ( -0.0416085 0.0416417 )
Norm@50keV : 4.44597E-03 ( -9.43075e-05 9.43046e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.49 using 59 PHA bins.
# Reduced chi-squared = 0.7805 for 57 degrees of freedom
# Null hypothesis probability = 8.862311e-01
Photon flux (15-150 keV) in 211.6 sec: 0.557864 ( -0.0132356 0.0132776 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.89801e-06 ( -1.99206e-07 1.99484e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 4.288 sec. to 215.860 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.16954 ( -0.180317 0.173427 )
Epeak [keV] : 129.986 ( -26.3697 71.5235 )
Norm@50keV : 6.40987E-03 ( -0.00104096 0.00129822 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 32.29 using 59 PHA bins.
# Reduced chi-squared = 0.5766 for 56 degrees of freedom
# Null hypothesis probability = 9.953821e-01
Photon flux (15-150 keV) in 211.6 sec: 0.541700 ( -0.015144 0.015223 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.66627e-06 ( -2.30792e-07 2.30157e-07 ) ergs/cm2
Band function
Time interval is from 4.288 sec. to 215.860 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.16952 ( -0.11646 0.140506 )
beta : -10.00000 ( 10 20 )
Epeak [keV] : 129.963 ( -22.8051 71.4061 )
Norm@50keV : 6.40923E-03 ( -0.00104088 0.00074904 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 32.29 using 59 PHA bins.
# Reduced chi-squared = 0.5871 for 55 degrees of freedom
# Null hypothesis probability = 9.937765e-01
Photon flux (15-150 keV) in 211.6 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] : 16.4823 ( )
R^2/D10^2 : 4.34698E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 385.87 using 59 PHA bins.
# Reduced chi-squared = 6.7696 for 57 degrees of freedom
# Null hypothesis probability = 2.323010e-50
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.131e-07 2.201e-08
25- 50 2.214e-06 6.560e-08
50-150 4.249e-06 1.661e-07
15-150 6.976e-06 1.841e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 2.27458 (-0.0481969 0.048196)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.49 using 59 PHA bins.
# Reduced chi-squared = 0.6928 for 57 degrees of freedom
# Null hypothesis probability = 9.626512e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.199e-06 2.888e-08
25- 50 2.306e-06 5.396e-08
50-150 5.057e-06 1.238e-07
15-150 8.561e-06 2.031e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.43998 (-0.690733 0.733057)
R1^2/D10^2 : 0.423422 (-0.113425 0.171247)
kT2 [keV] : 26.2552 (-2.00532 2.53393)
R2^2/D10^2 : 6.86677E-03 (-0.00198794 0.00240865)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.69 using 59 PHA bins.
# Reduced chi-squared = 0.6852 for 55 degrees of freedom
# Null hypothesis probability = 9.640349e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.015e-06 7.406e-08
25- 50 2.284e-06 1.153e-07
50-150 5.258e-06 3.036e-07
15-150 8.556e-06 3.650e-07
Peak spectrum fit
Power-law model
Time interval is from 87.220 sec. to 88.220 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.994284 ( -0.124159 0.122169 )
Norm@50keV : 2.01576E-02 ( -0.00142358 0.00142113 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.95 using 59 PHA bins.
# Reduced chi-squared = 1.017 for 57 degrees of freedom
# Null hypothesis probability = 4.400011e-01
Photon flux (15-150 keV) in 1 sec: 2.32007 ( -0.16571 0.165812 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.1845e-07 ( -1.71431e-08 1.71737e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 87.220 sec. to 88.220 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.553816 ( -0.537164 0.472914 )
Epeak [keV] : 184.811 ( -71.959 -184.811 )
Norm@50keV : 3.19506E-02 ( -0.0120353 0.022774 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.46 using 59 PHA bins.
# Reduced chi-squared = 0.9903 for 56 degrees of freedom
# Null hypothesis probability = 4.953870e-01
Photon flux (15-150 keV) in 1 sec: 2.27855 ( -0.17206 0.17186 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.13125e-07 ( -1.847e-08 1.8347e-08 ) ergs/cm2
Band function
Time interval is from 87.220 sec. to 88.220 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -5 -5 )
beta : -1.06792 ( -0.141277 0.13922 )
Epeak [keV] : 28.6534 ( -28.6534 5.43608 )
Norm@50keV : 623.997 ( -43.6132 2.72593e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.34 using 59 PHA bins.
# Reduced chi-squared = 1.006 for 55 degrees of freedom
# Null hypothesis probability = 4.617255e-01
Photon flux (15-150 keV) in 1 sec: 2.30252 ( ) 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] : 21.5505 (-1.98706 2.2814)
R^2/D10^2 : 8.89365E-02 (-0.0239918 0.0317079)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 80.60 using 59 PHA bins.
# Reduced chi-squared = 1.414 for 57 degrees of freedom
# Null hypothesis probability = 2.150925e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.716e-09 1.153e-09
25- 50 4.030e-08 4.175e-09
50-150 1.397e-07 1.710e-08
15-150 1.877e-07 1.725e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 9.26832 (-0.682356 0.682326)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 109.75 using 59 PHA bins.
# Reduced chi-squared = 1.9254 for 57 degrees of freedom
# Null hypothesis probability = 3.395341e-05
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.308e-08 2.135e-09
25- 50 4.440e-08 9.175e-09
50-150 9.738e-08 3.260e-08
15-150 1.649e-07 4.477e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.03564 (-2.42259 3.31065)
R1^2/D10^2 : 0.940115 (-0.577958 2.05492)
kT2 [keV] : 31.5282 (-5.97063 13.2848)
R2^2/D10^2 : 2.34605E-02 (-0.0157524 0.0238014)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.40 using 59 PHA bins.
# Reduced chi-squared = 0.9892 for 55 degrees of freedom
# Null hypothesis probability = 4.973439e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.455e-08 6.700e-09
25- 50 4.168e-08 1.399e-08
50-150 1.582e-07 5.759e-08
15-150 2.144e-07 7.806e-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: 1.44014 ( -0.0501887 0.0502052 )
Norm@50keV : 4.78771E-03 ( -0.000125507 0.000125497 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.27 using 59 PHA bins.
# Reduced chi-squared = 0.6539 for 57 degrees of freedom
# Null hypothesis probability = 9.799728e-01
Photon flux (15-150 keV) in 113.4 sec: 0.588590 ( -0.0166677 0.0167076 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.20496e-06 ( -1.47214e-07 1.47524e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.11209 ( -0.213082 0.203255 )
Epeak [keV] : 146.375 ( -37.0485 140.414 )
Norm@50keV : 6.78963E-03 ( -0.00129033 0.00168136 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 29.49 using 59 PHA bins.
# Reduced chi-squared = 0.5267 for 56 degrees of freedom
# Null hypothesis probability = 9.986503e-01
Photon flux (15-150 keV) in 113.4 sec: 0.574497 ( -0.01856 0.018617 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.07871e-06 ( -1.67843e-07 1.67288e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.11206 ( -0.354044 2.98711 )
beta : -3.86070 ( 3.99192 13.9919 )
Epeak [keV] : 146.347 ( -103.975 137.818 )
Norm@50keV : 6.78907E-03 ( -0.000878773 0.00120318 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 29.49 using 59 PHA bins.
# Reduced chi-squared = 0.5362 for 55 degrees of freedom
# Null hypothesis probability = 9.981020e-01
Photon flux (15-150 keV) in 113.4 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) = 2.22e-06
S(50-100 keV) = 3.10e-06
T90 vs. Hardness ratio plot
T90 = 166.648000016809 sec.
Hardness ratio (energy fluence ratio) = 1.3964
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.37577
Count Ratio (50-100 keV) / (15-25 keV) = 1.05133
Mask shadow pattern
IMX = -4.228447235908394E-01, IMY = -2.098357256255445E-01
TIME vs. PHA plot around the trigger time
TIME vs. DetID plot around the trigger time
100 us light curve (15-350 keV)
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:
-299.392000 4.288000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.4590 35.3065 3.4 38.2 -26.1 0.8892 3.4 2.2 Her X-1
299.5950 35.2006 0.3 29.9 -92.7 11.7362 39.9 0.2 Cyg X-1
308.2012 40.9257 2.2 25.2 -109.1 1.1847 5.2 4.4 Cyg X-3
326.3468 38.3251 2.9 32.3 -135.0 0.8724 4.0 8.2 Cyg X-2
241.3418 43.9171 2.9 36.0 -4.3 0.8887 4.0 ------ UNKNOWN
278.1359 59.6893 3.0 9.4 -21.6 0.6306 3.9 ------ UNKNOWN
338.4175 24.8380 2.4 48.8 -141.2 2.4543 4.7 ------ UNKNOWN
293.6725 24.0881 2.4 40.9 -83.3 3.4830 4.7 ------ UNKNOWN
270.2844 20.6117 2.9 47.3 -53.0 3.4587 4.1 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
4.288000 117.708590
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.3783 35.4179 5.6 38.1 -25.9 -0.3788 -2.1 6.0 Her X-1
299.6049 35.2033 13.0 29.9 -92.8 -0.1972 -0.9 0.7 Cyg X-1
308.1191 41.0665 6.4 25.1 -109.0 -0.3107 -1.8 6.8 Cyg X-3
326.0874 38.2325 3.7 32.3 -134.6 0.5263 3.1 6.7 Cyg X-2
358.4903 65.9339 0.2 25.3 153.6 8.2749 53.8 ------ UNKNOWN
234.4756 40.7647 3.1 41.5 -0.5 0.7468 3.8 ------ UNKNOWN
306.7369 33.9491 2.6 31.8 -103.8 0.9773 4.5 ------ UNKNOWN
310.0259 24.1834 2.7 41.9 -105.9 2.5199 4.4 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
162.508600 302.662400
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
308.1802 41.0904 3.8 37.2 -70.3 0.9305 3.0 8.9 Cyg X-3
326.0632 38.1967 6.8 33.3 -93.9 -0.4456 -1.7 9.1 Cyg X-2
157.2989 75.2305 2.5 38.2 44.8 1.3995 4.6 ------ UNKNOWN
53.7256 53.1764 0.9 29.6 124.5 2.6551 12.1 ------ UNKNOWN
28.8242 48.8436 3.0 23.3 158.6 0.5898 3.8 ------ UNKNOWN
30.6657 16.1871 3.6 54.2 177.0 1.7669 3.2 ------ UNKNOWN
358.4589 65.9543 0.7 0.0 107.4 2.2767 17.3 ------ UNKNOWN
22.8678 30.9563 3.2 38.0 -179.0 0.7488 3.6 ------ UNKNOWN
Plot creation:
Sun May 31 17:44:30 EDT 2015