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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
140.3770 -58.1995 0.0118 30.6001 36.7810 3.8008661 16.332 TRIG_00547918
Foreground time interval of the image:
-8.784 147.216 (delta_t = 156.000 [sec])
Background time interval of the image:
-239.784 -8.784 (delta_t = 231.000 [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 2.048000
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 2.048000
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 2.048000
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 -8.784 sec. to 147.216 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.58852 ( -0.164687 0.166595 )
Norm@50keV : 1.34933E-03 ( -0.000127225 0.000126037 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.27 using 59 PHA bins.
# Reduced chi-squared = 1.040 for 57 degrees of freedom
# Null hypothesis probability = 3.928505e-01
Photon flux (15-150 keV) in 156 sec: 0.172785 ( -0.0157467 0.0157782 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.97139e-06 ( -2.00661e-07 2.02805e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -8.784 sec. to 147.216 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.58849 ( -0.244517 0.166278 )
Epeak [keV] : 9999.33 ( -9999.36 -9999.36 )
Norm@50keV : 1.34876E-03 ( -0.000454029 0.00117324 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.27 using 59 PHA bins.
# Reduced chi-squared = 1.058 for 56 degrees of freedom
# Null hypothesis probability = 3.571666e-01
Photon flux (15-150 keV) in 156 sec: 0.172780 ( -0.015806 0.015708 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.96401e-06 ( -2.08853e-07 2.10085e-07 ) ergs/cm2
Band function
Time interval is from -8.784 sec. to 147.216 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.85521 ( -4.85521 -4.85521 )
beta : -1.62851 ( -0.184861 0.175997 )
Epeak [keV] : 21.1519 ( -21.1519 4.82411 )
Norm@50keV : 336.891 ( -29.9102 799550 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.47 using 59 PHA bins.
# Reduced chi-squared = 1.063 for 55 degrees of freedom
# Null hypothesis probability = 3.491584e-01
Photon flux (15-150 keV) in 156 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] : 14.9510 (-1.92994 2.23146)
R^2/D10^2 : 1.86997E-02 (-0.00716759 0.0118069)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 101.71 using 59 PHA bins.
# Reduced chi-squared = 1.7843 for 57 degrees of freedom
# Null hypothesis probability = 2.507742e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.366e-07 2.421e-08
25- 50 5.411e-07 7.511e-08
50-150 8.220e-07 1.679e-07
15-150 1.500e-06 1.752e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 197.832 (-77.771 -197.667)
Norm : 0.698090 (-0.0627795 0.0731879)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.40 using 59 PHA bins.
# Reduced chi-squared = 1.060 for 57 degrees of freedom
# Null hypothesis probability = 3.539679e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.715e-07 6.755e-08
25- 50 5.217e-07 2.291e-07
50-150 1.141e-06 5.692e-07
15-150 1.934e-06 9.248e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.37302 (-1.05942 1.32874)
R1^2/D10^2 : 0.533983 (-0.309495 0.811904)
kT2 [keV] : 24.5368 (-4.34996 6.68641)
R2^2/D10^2 : 2.83949E-03 (-0.00157983 0.00279801)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.12 using 59 PHA bins.
# Reduced chi-squared = 1.002 for 55 degrees of freedom
# Null hypothesis probability = 4.701830e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.147e-07 1.231e-07
25- 50 4.709e-07 1.376e-07
50-150 1.188e-06 3.789e-07
15-150 1.974e-06 5.838e-07
Peak spectrum fit
Power-law model
Time interval is from 1.216 sec. to 2.216 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.65540 ( -0.390416 0.403484 )
Norm@50keV : 6.70068E-03 ( -0.00172869 0.00168683 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.98 using 59 PHA bins.
# Reduced chi-squared = 0.9821 for 57 degrees of freedom
# Null hypothesis probability = 5.133478e-01
Photon flux (15-150 keV) in 1 sec: 0.876505 ( -0.203291 0.203448 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.22859e-08 ( -1.65624e-08 1.72462e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.216 sec. to 2.216 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.04579 ( -2.50797 1.34116 )
Epeak [keV] : 64.9177 ( -53.7035 -64.9797 )
Norm@50keV : 1.52708E-02 ( -0.0152862 0.722311 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.40 using 59 PHA bins.
# Reduced chi-squared = 0.9893 for 56 degrees of freedom
# Null hypothesis probability = 4.974256e-01
Photon flux (15-150 keV) in 1 sec: 0.858739 ( -0.20548 0.105002 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.75708e-08 ( -2.00041e-08 2.0014e-08 ) ergs/cm2
Band function
Time interval is from 1.216 sec. to 2.216 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.24625 ( -6.61627 1.24557 )
beta : -2.24306 ( 9.37167 19.3717 )
Epeak [keV] : 29.3002 ( -33.7629 -67.3623 )
Norm@50keV : 113.372 ( -112.901 62.6494 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.78 using 59 PHA bins.
# Reduced chi-squared = 0.9232 for 55 degrees of freedom
# Null hypothesis probability = 6.365530e-01
Photon flux (15-150 keV) in 1 sec: 0.859830 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 5.65703e-08 ( -5.65633e-08 -1.65544e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.45887 (-2.26988 4.06451)
R^2/D10^2 : 0.517637 (-0.379961 0.958418)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.55 using 59 PHA bins.
# Reduced chi-squared = 1.027 for 57 degrees of freedom
# Null hypothesis probability = 4.183050e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.232e-09 4.233e-09
25- 50 2.117e-08 9.277e-09
50-150 9.385e-09 5.666e-09
15-150 3.979e-08 1.701e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 132.366 (-77.7594 -129.416)
Norm : 3.67472 (-0.932594 1.48851)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.44 using 59 PHA bins.
# Reduced chi-squared = 0.9727 for 57 degrees of freedom
# Null hypothesis probability = 5.336464e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.524e-09 5.600e-09
25- 50 1.732e-08 9.845e-09
50-150 3.238e-08 2.136e-08
15-150 5.922e-08 3.606e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.95527 (-1.83557 2.5657)
R1^2/D10^2 : 1.31658 (-0.901737 2.66466)
kT2 [keV] : 31.7069 (-15.4235 -31.6944)
R2^2/D10^2 : 4.80083E-03 (-0.0045572 0.0146142)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.64 using 59 PHA bins.
# Reduced chi-squared = 0.9389 for 55 degrees of freedom
# Null hypothesis probability = 6.037822e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.089e-08 6.630e-09
25- 50 1.835e-08 1.046e-08
50-150 3.412e-08 2.100e-08
15-150 6.336e-08 3.466e-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: 1.58852 ( -0.164687 0.166595 )
Norm@50keV : 1.34933E-03 ( -0.000127225 0.000126037 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.27 using 59 PHA bins.
# Reduced chi-squared = 1.040 for 57 degrees of freedom
# Null hypothesis probability = 3.928505e-01
Photon flux (15-150 keV) in 156 sec: 0.172785 ( -0.0157467 0.0157782 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.97139e-06 ( -2.00661e-07 2.02805e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.58849 ( -0.244517 0.166278 )
Epeak [keV] : 9999.33 ( -9999.36 -9999.36 )
Norm@50keV : 1.34876E-03 ( -0.000454029 0.00117324 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.27 using 59 PHA bins.
# Reduced chi-squared = 1.058 for 56 degrees of freedom
# Null hypothesis probability = 3.571666e-01
Photon flux (15-150 keV) in 156 sec: 0.172780 ( -0.015806 0.015708 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.96401e-06 ( -2.08853e-07 2.10085e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.85521 ( -4.85521 -4.85521 )
beta : -1.62851 ( -0.184861 0.175997 )
Epeak [keV] : 21.1519 ( -21.1519 4.82411 )
Norm@50keV : 336.891 ( -29.9102 799550 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.47 using 59 PHA bins.
# Reduced chi-squared = 1.063 for 55 degrees of freedom
# Null hypothesis probability = 3.491584e-01
Photon flux (15-150 keV) in 156 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) = 5.08e-07
S(50-100 keV) = 6.76e-07
T90 vs. Hardness ratio plot
T90 = 121 sec.
Hardness ratio (energy fluence ratio) = 1.33071
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.0585
Count Ratio (50-100 keV) / (15-25 keV) = 0.934034
Mask shadow pattern
IMX = 4.736715253089596E-01, IMY = -3.541063402407680E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 2.048000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 2.048000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 2.048000
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:
-239.784000 -8.784000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.3020 -60.5941 1.9 16.4 51.9 1.2528 6.0 1.8 Cen X-3
186.5448 -62.7814 2.5 8.5 54.9 0.8013 4.6 3.1 GX 301-2
244.9453 -15.6425 1.1 55.2 -164.6 7.3948 10.9 2.0 Sco X-1
255.9605 -37.8568 2.3 39.5 -139.2 1.6267 5.0 1.4 4U 1700-377
256.4265 -36.4576 3.5 40.8 -139.8 1.0891 3.3 2.1 GX 349+2
264.5199 -44.3536 119.4 37.9 -124.7 0.0309 0.1 11.2 4U 1735-44
262.9347 -33.9669 8.4 45.7 -135.1 -0.6903 -1.4 8.4 GX 354-0
121.1635 -43.7172 2.0 49.3 38.6 5.3844 5.9 ------ UNKNOWN
118.1265 -59.9082 3.0 38.1 21.2 1.1040 3.9 ------ UNKNOWN
4.0902 -64.5759 4.2 50.8 -44.5 2.5921 2.8 ------ UNKNOWN
8.8072 -63.6135 2.9 52.1 -42.2 3.7976 3.9 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-8.784000 147.216000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.2759 -60.7232 7.5 16.4 51.5 0.2572 1.5 6.1 Cen X-3
186.5646 -62.9519 4.4 8.4 53.8 -0.4187 -2.6 11.2 GX 301-2
244.8971 -15.7739 0.0 55.1 -164.6 -0.6370 -1.2 9.3 Sco X-1
255.9606 -37.8399 5.8 39.5 -139.2 -0.5062 -2.0 1.3 4U 1700-377
256.6465 -36.5459 46.7 40.9 -139.5 -0.0695 -0.2 12.6 GX 349+2
264.6347 -44.5570 4.9 37.8 -124.4 0.6953 2.3 7.9 4U 1735-44
263.0879 -33.7005 0.0 46.0 -135.2 -0.8633 -1.9 9.4 GX 354-0
140.3770 -58.1995 0.7 30.6 36.8 3.8012 16.3 ------ UNKNOWN
231.5410 -11.3717 1.9 55.5 178.7 4.4420 6.1 ------ UNKNOWN
31.8628 -58.5220 1.9 57.7 -28.9 5.8498 5.9 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
741.516600 962.280800
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.3276 35.2399 3.3 29.5 37.1 0.8099 3.5 8.9 Her X-1
268.2597 -1.4059 4.7 48.7 -19.5 0.9121 2.5 7.1 SW J1753.5-0127
288.7713 10.9437 0.9 31.7 -46.2 3.1371 12.8 1.6 GRS 1915+105
299.5922 35.1936 0.6 9.8 -94.6 3.5052 20.0 0.5 Cyg X-1
308.0982 40.9481 1.9 12.6 -139.1 1.0120 5.9 0.6 Cyg X-3
326.0399 38.2839 3.8 26.6 -143.4 0.5934 3.1 6.6 Cyg X-2
8.5090 82.5186 2.5 46.2 139.1 3.3067 4.6 ------ UNKNOWN
290.4565 37.7391 3.0 4.9 -42.7 0.6083 3.8 ------ UNKNOWN
3.1001 42.6941 3.1 51.1 -167.2 1.7961 3.7 ------ UNKNOWN
332.2138 16.0059 2.6 43.8 -116.3 3.4440 4.4 ------ UNKNOWN
Plot creation:
Sat May 30 17:27:19 EDT 2015