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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
254.6187 12.3442 0.0190 33.4962 -78.7839 1.5348785 10.102 TRIG_00230662
Foreground time interval of the image:
-42.252 11.269 (delta_t = 53.521 [sec])
Background time interval of the image:
-239.832 -42.252 (delta_t = 197.580 [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)
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 -42.252 sec. to 21.464 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.78299 ( -0.212893 0.221158 )
Norm@50keV : 1.66490E-03 ( -0.000240484 0.000236858 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.13 using 59 PHA bins.
# Reduced chi-squared = 1.266 for 57 degrees of freedom
# Null hypothesis probability = 8.540504e-02
Photon flux (15-150 keV) in 63.72 sec: 0.227922 ( -0.0297287 0.0297621 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.77318e-07 ( -1.42815e-07 1.45163e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -42.252 sec. to 21.464 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.276167 ( -1.49367 1.08018 )
Epeak [keV] : 50.8025 ( -9.25881 23.0345 )
Norm@50keV : 1.12191E-02 ( -0.0112194 0.0636629 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.88 using 59 PHA bins.
# Reduced chi-squared = 1.177 for 56 degrees of freedom
# Null hypothesis probability = 1.720181e-01
Photon flux (15-150 keV) in 63.72 sec: 0.216503 ( -0.030977 0.030868 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.73206e-07 ( -1.47811e-07 1.58727e-07 ) ergs/cm2
Band function
Time interval is from -42.252 sec. to 21.464 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.313383 ( -1.75198 2.10995 )
beta : -2.72730 ( 2.71957 0.745038 )
Epeak [keV] : 45.6213 ( -10.3403 26.4452 )
Norm@50keV : 2.60098E-02 ( -0.0238063 0.543592 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.66 using 59 PHA bins.
# Reduced chi-squared = 1.194 for 55 degrees of freedom
# Null hypothesis probability = 1.538732e-01
Photon flux (15-150 keV) in 63.72 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 8.93418e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 11.8490 (-1.48208 1.73553)
R^2/D10^2 : 6.03539E-02 (-0.02431 0.0391515)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.62 using 59 PHA bins.
# Reduced chi-squared = 1.221 for 57 degrees of freedom
# Null hypothesis probability = 1.218017e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.141e-07 2.638e-08
25- 50 3.536e-07 7.133e-08
50-150 2.960e-07 8.134e-08
15-150 7.637e-07 1.334e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 95.9356 (-32.43 69.2544)
Norm : 1.03275 (-0.171183 0.21015)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.24 using 59 PHA bins.
# Reduced chi-squared = 1.197 for 57 degrees of freedom
# Null hypothesis probability = 1.463032e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.719e-07 3.148e-08
25- 50 2.948e-07 4.330e-08
50-150 4.665e-07 2.078e-07
15-150 9.332e-07 2.638e-07
Double BB
R1^2/D10^2 : 2.96993E-03 ( )
kT2 [keV] : 8.89238 (-7.66646 -9.00482)
R2^2/D10^2 : 0.122065 (-0.0876544 1146.4)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.38 using 59 PHA bins.
#Fit statistic : Chi-Squared = 66.27 using 59 PHA bins.
#Fit statistic : Chi-Squared = 66.25 using 59 PHA bins.
# Reduced chi-squared = 1.207 for 55 degrees of freedom
# Reduced chi-squared = 1.205 for 55 degrees of freedom
# Reduced chi-squared = 1.205 for 55 degrees of freedom
# Null hypothesis probability = 1.398638e-01
# Null hypothesis probability = 1.420207e-01
# Null hypothesis probability = 1.423319e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.501e-07 7.209e-08
25- 50 3.202e-07 1.737e-07
50-150 3.532e-07 1.895e-07
15-150 8.235e-07 4.001e-07
Peak spectrum fit
Power-law model
Time interval is from 0.032 sec. to 1.032 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.45021 ( -0.309906 0.312167 )
Norm@50keV : 1.11285E-02 ( -0.00203781 0.002026 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.86 using 59 PHA bins.
# Reduced chi-squared = 0.9098 for 57 degrees of freedom
# Null hypothesis probability = 6.678792e-01
Photon flux (15-150 keV) in 1 sec: 1.37150 ( -0.252816 0.253603 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.06487e-07 ( -2.11537e-08 2.14578e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.032 sec. to 1.032 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.893000 ( -1.56117 0.829527 )
Epeak [keV] : 102.162 ( -45.1755 -102.161 )
Norm@50keV : 2.09934E-02 ( -0.0116217 0.0942753 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.25 using 59 PHA bins.
# Reduced chi-squared = 0.9151 for 56 degrees of freedom
# Null hypothesis probability = 6.550845e-01
Photon flux (15-150 keV) in 1 sec: 1.33979 ( -0.26038 0.26255 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.02849e-07 ( -2.27238e-08 2.2927e-08 ) ergs/cm2
Band function
Time interval is from 0.032 sec. to 1.032 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.940073 ( 0.940073 0.747166 )
beta : -8.51095 ( 7.73927 17.7393 )
Epeak [keV] : 106.305 ( -45.5608 -106.305 )
Norm@50keV : 1.99663E-02 ( -0.00357112 0.0173936 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.25 using 59 PHA bins.
# Reduced chi-squared = 0.9318 for 55 degrees of freedom
# Null hypothesis probability = 6.186989e-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] : 16.2611 (-3.2673 4.22189)
R^2/D10^2 : 0.120175 (-0.0663497 0.142717)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.34 using 59 PHA bins.
# Reduced chi-squared = 0.9884 for 57 degrees of freedom
# Null hypothesis probability = 4.998571e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.546e-09 2.630e-09
25- 50 2.793e-08 7.645e-09
50-150 5.193e-08 1.960e-08
15-150 8.640e-08 2.696e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-94.2513 -199.363)
Norm : 5.66647 (-1.01647 1.01648)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.74 using 59 PHA bins.
# Reduced chi-squared = 0.9078 for 57 degrees of freedom
# Null hypothesis probability = 6.719408e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.411e-08 8.210e-09
25- 50 2.714e-08 1.557e-08
50-150 5.953e-08 3.381e-08
15-150 1.008e-07 5.780e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.31832 (-3.45559 6.64895)
R1^2/D10^2 : 3.04158 (-3.04031 837.671)
kT2 [keV] : 21.2015 (-5.75326 30.7278)
R2^2/D10^2 : 4.19127E-02 (-0.0384203 0.0887115)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.91 using 59 PHA bins.
# Reduced chi-squared = 0.9256 for 55 degrees of freedom
# Null hypothesis probability = 6.316820e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.295e-08 7.530e-09
25- 50 2.546e-08 1.292e-08
50-150 6.184e-08 3.557e-08
15-150 1.003e-07 5.245e-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: 1.70912 ( -0.220804 0.228142 )
Norm@50keV : 1.75820E-03 ( -0.000258899 0.000255668 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 76.61 using 59 PHA bins.
# Reduced chi-squared = 1.344 for 57 degrees of freedom
# Null hypothesis probability = 4.263615e-02
Photon flux (15-150 keV) in 53.52 sec: 0.234257 ( -0.0322251 0.0322748 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.70642e-07 ( -1.32266e-07 1.34289e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.265362 ( -1.39418 1.04249 )
Epeak [keV] : 56.2375 ( -10.8201 30.0009 )
Norm@50keV : 1.02188E-02 ( -0.0102188 0.0442628 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.51 using 59 PHA bins.
# Reduced chi-squared = 1.259 for 56 degrees of freedom
# Null hypothesis probability = 9.188533e-02
Photon flux (15-150 keV) in 53.52 sec: 0.222574 ( -0.033447 0.033409 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.92958e-07 ( -1.35068e-07 1.42561e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.265148 ( -0.782773 1.79046 )
beta : -10.0000 ( 10 3.55271e-15 )
Epeak [keV] : 56.2251 ( -10.8329 29.9833 )
Norm@50keV : 1.02224E-02 ( -0.0102224 0.0443991 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.51 using 59 PHA bins.
# Reduced chi-squared = 1.282 for 55 degrees of freedom
# Null hypothesis probability = 7.768234e-02
Photon flux (15-150 keV) in 53.52 sec: 0.225717 ( 6.77428 -0.03716 ) 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) = 2.73e-07
S(50-100 keV) = 3.18e-07
T90 vs. Hardness ratio plot
T90 = 58.4920000135899 sec.
Hardness ratio (energy fluence ratio) = 1.16484
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.31946
Count Ratio (50-100 keV) / (15-25 keV) = 0.679
Mask shadow pattern
IMX = 1.287251865674372E-01, IMY = 6.491500994038034E-01
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:
-239.832000 -42.252000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.4262 35.3874 3.8 39.6 -40.9 1.0504 3.1 3.1 Her X-1
263.1354 -24.7803 5.5 43.6 -139.9 0.8182 2.1 7.2 GX 1+4
268.3782 -1.4613 10.3 23.8 -114.8 0.2318 1.1 0.8 SW J1753.5-0127
270.2836 -25.0808 66.2 40.3 -148.2 0.0493 0.2 0.1 GX 5-1
270.3025 -25.7431 11.1 40.9 -148.7 -0.2985 -1.0 0.0 GRS 1758-258
274.0246 -14.0197 3.4 29.0 -143.9 0.6865 3.4 1.5 GX 17+2
275.9254 -30.3669 15.5 43.1 -158.3 0.2278 0.7 0.0 H1820-303
284.9033 -24.9447 4.5 36.1 -168.6 0.5495 2.6 7.4 HT1900.1-2455
288.7890 10.9394 0.7 0.0 -112.7 2.9526 17.2 0.7 GRS 1915+105
299.5963 35.1998 0.3 26.2 25.6 9.1413 45.6 0.3 Cyg X-1
308.0580 40.8799 3.3 34.4 31.5 0.9854 3.5 5.0 Cyg X-3
326.3373 38.2370 84.3 43.2 49.7 -0.0984 -0.1 9.3 Cyg X-2
262.9766 -33.8534 4.0 51.1 -146.9 1.5317 2.9 1.3 GX 354-0
308.0565 37.6432 1.2 31.8 35.0 2.3478 9.6 ------ UNKNOWN
272.3487 -46.7298 3.5 59.5 -161.6 5.2683 3.4 ------ UNKNOWN
239.8620 39.0264 3.0 51.6 -43.0 4.3146 3.9 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-42.252000 11.268580
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.5704 35.5413 0.0 39.6 -40.6 -0.3227 -2.3 13.1 Her X-1
263.0602 -24.8368 4.3 43.7 -139.9 0.4480 2.6 6.1 GX 1+4
268.4939 -1.3011 0.0 23.6 -114.6 0.1844 2.0 11.8 SW J1753.5-0127
270.2510 -25.0998 21.6 40.3 -148.2 0.0674 0.5 2.2 GX 5-1
270.1367 -25.6175 20.4 40.8 -148.4 0.0740 0.6 11.7 GRS 1758-258
274.1132 -13.8899 5.2 28.8 -143.9 -0.2066 -2.2 10.8 GX 17+2
276.0595 -30.3584 8.8 43.1 -158.5 -0.1716 -1.3 7.0 H1820-303
285.1702 -25.0446 9.9 36.2 -169.1 0.1249 1.2 10.4 HT1900.1-2455
288.9025 10.9573 4.4 0.1 91.6 0.2128 2.6 6.2 GRS 1915+105
299.6252 35.0759 5.3 26.1 25.8 -0.1983 -2.2 7.7 Cyg X-1
308.0423 41.0182 11.1 34.5 31.4 -0.1300 -1.0 5.0 Cyg X-3
326.2758 38.3476 5.0 43.2 49.5 0.7070 2.3 5.1 Cyg X-2
263.1156 -33.7834 9.2 51.0 -147.0 -0.2981 -1.3 7.0 GX 354-0
322.0782 -8.8920 2.5 38.6 125.0 0.9001 4.7 ------ UNKNOWN
295.4029 -34.3871 3.4 45.8 177.8 0.5126 3.4 ------ UNKNOWN
254.6187 12.3441 1.1 33.5 -78.8 1.5349 10.1 ------ UNKNOWN
254.6902 -26.1706 2.1 49.8 -133.4 2.0565 5.5 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
65.468600 923.068610
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9777 -15.6408 0.2 29.6 -157.5 33.8162 51.6 0.1 Sco X-1
254.4393 35.3593 1.1 23.0 3.0 6.2767 10.0 1.4 Her X-1
256.0501 -37.8594 3.1 50.3 -178.0 5.5118 3.7 3.1 4U 1700-377
256.4376 -36.5199 8.0 48.9 -178.5 1.6804 1.4 5.8 GX 349+2
263.1399 -24.7389 4.4 38.0 170.9 2.0206 2.6 7.1 GX 1+4
268.5136 -1.4754 3.3 19.5 137.7 2.1196 3.5 8.8 SW J1753.5-0127
270.4040 -25.2097 6.0 40.6 161.3 2.2369 1.9 10.2 GX 5-1
270.3676 -25.8516 4.2 41.2 161.7 3.1964 2.7 7.4 GRS 1758-258
273.9715 -14.0348 4.8 32.6 146.9 2.2891 2.4 2.0 GX 17+2
275.8673 -30.4044 6.4 47.4 158.3 3.7876 1.8 3.7 H1820-303
285.0582 -24.7726 3.8 47.6 144.9 -6.6419 -3.0 9.0 HT1900.1-2455
288.7777 10.9429 1.8 33.4 92.3 9.6323 6.4 1.2 GRS 1915+105
262.9925 -33.8235 2.6 46.9 173.9 5.3030 4.4 0.7 GX 354-0
236.3853 -44.7693 3.6 59.5 -161.6 14.9484 3.2 ------ UNKNOWN
205.3255 42.0753 5.7 52.0 -42.2 8.0145 2.0 ------ UNKNOWN
208.1355 32.6519 4.2 47.0 -53.2 9.1438 2.8 ------ UNKNOWN
216.2065 -7.5016 4.9 43.1 -112.1 7.5858 2.4 ------ UNKNOWN
Plot creation:
Sun May 31 12:01:25 EDT 2015