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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
276.0327 -5.6675 0.0114 12.3053 20.1469 2.1445387 16.835 TRIG_00535026
Foreground time interval of the image:
-27.728 74.501 (delta_t = 102.229 [sec])
Background time interval of the image:
-239.000 -27.728 (delta_t = 211.272 [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 64.000000
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 64.000000
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 64.000000
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 -27.728 sec. to 142.968 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.35063 ( -0.148763 0.147229 )
Norm@50keV : 1.02672E-03 ( -8.18552e-05 8.18247e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 90.12 using 59 PHA bins.
# Reduced chi-squared = 1.581 for 57 degrees of freedom
# Null hypothesis probability = 3.388242e-03
Photon flux (15-150 keV) in 170.7 sec: 0.123706 ( -0.0103677 0.0104173 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.71149e-06 ( -1.49568e-07 1.50603e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -27.728 sec. to 142.968 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.23707 ( -0.596545 0.204121 )
Epeak [keV] : 326.251 ( -583.181 -583.181 )
Norm@50keV : 1.16416E-03 ( -0.000364864 0.000969197 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 90.17 using 59 PHA bins.
# Reduced chi-squared = 1.610 for 56 degrees of freedom
# Null hypothesis probability = 2.569109e-03
Photon flux (15-150 keV) in 170.7 sec: 0.123250 ( -0.011023 0.010677 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.70384e-06 ( -1.67378e-07 1.56786e-07 ) ergs/cm2
Band function
Time interval is from -27.728 sec. to 142.968 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.93087 ( -4.93087 -4.93087 )
beta : -1.38973 ( -0.162568 0.15865 )
Epeak [keV] : 23.0971 ( -23.0971 5.41418 )
Norm@50keV : 135.975 ( -10.8139 368774 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 89.20 using 59 PHA bins.
# Reduced chi-squared = 1.622 for 55 degrees of freedom
# Null hypothesis probability = 2.413939e-03
Photon flux (15-150 keV) in 170.7 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] : 17.1578 ( )
R^2/D10^2 : 8.83021E-03 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 124.88 using 59 PHA bins.
# Reduced chi-squared = 2.1909 for 57 degrees of freedom
# Null hypothesis probability = 5.525472e-07
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.014e-08 1.579e-08
25- 50 4.018e-07 4.984e-08
50-150 8.469e-07 1.316e-07
15-150 1.339e-06 1.460e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 0.514798 (-0.0412779 0.041273)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 95.93 using 59 PHA bins.
# Reduced chi-squared = 1.683 for 57 degrees of freedom
# Null hypothesis probability = 9.605878e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.188e-07 2.313e-08
25- 50 4.209e-07 5.420e-08
50-150 9.231e-07 4.000e-07
15-150 1.563e-06 5.020e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.22076 (-2.57959 1.4436)
R1^2/D10^2 : 7.14192E-02 (-0.0418653 0.110271)
kT2 [keV] : 33.7548 (-10.2372 40.3472)
R2^2/D10^2 : 7.51450E-04 (-0.000650173 0.00183598)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 91.73 using 59 PHA bins.
# Reduced chi-squared = 1.668 for 55 degrees of freedom
# Null hypothesis probability = 1.384060e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.731e-07 6.737e-08
25- 50 4.155e-07 1.420e-07
50-150 1.122e-06 5.510e-07
15-150 1.711e-06 7.052e-07
Peak spectrum fit
Power-law model
Time interval is from 3.272 sec. to 4.272 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.71097 ( -0.542116 0.574582 )
Norm@50keV : 3.46663E-03 ( -0.00114268 0.0011 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.01 using 59 PHA bins.
# Reduced chi-squared = 0.8247 for 57 degrees of freedom
# Null hypothesis probability = 8.246578e-01
Photon flux (15-150 keV) in 1 sec: 0.462187 ( -0.139742 0.140742 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.20698e-08 ( -1.05953e-08 1.10374e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 3.272 sec. to 4.272 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.20528 ( -2.73202 1.05834 )
Epeak [keV] : 74.3144 ( -74.3092 -74.3092 )
Norm@50keV : 6.39657E-03 ( -0.00639717 0.1773 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.80 using 59 PHA bins.
# Reduced chi-squared = 0.8357 for 56 degrees of freedom
# Null hypothesis probability = 8.045972e-01
Photon flux (15-150 keV) in 1 sec: 0.450767 ( -0.145883 0.146275 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.07112e-08 ( -1.12489e-08 1.1935e-08 ) ergs/cm2
Band function
Time interval is from 3.272 sec. to 4.272 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.21709 ( -0.79019 2.74136 )
beta : -10.0000 ( 10 0 )
Epeak [keV] : 74.8380 ( -49.2925 -74.838 )
Norm@50keV : 6.31078E-03 ( -0.00393767 0.177443 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.80 using 59 PHA bins.
# Reduced chi-squared = 0.8509 for 55 degrees of freedom
# Null hypothesis probability = 7.763854e-01
Photon flux (15-150 keV) in 1 sec: 0.448344 ( 6.55166 -0.14333 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.05094e-08 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.1228 (-4.69068 7.43753)
R^2/D10^2 : 7.91658E-02 (-0.0784025 0.325037)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.55 using 59 PHA bins.
# Reduced chi-squared = 0.8693 for 57 degrees of freedom
# Null hypothesis probability = 7.478287e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.891e-09 1.846e-09
25- 50 1.006e-08 6.115e-09
50-150 1.101e-08 7.610e-09
15-150 2.396e-08 1.445e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 136.082 (-88.5612 -132.513)
Norm : 1.90153 (-0.618124 1.10241)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.82 using 59 PHA bins.
# Reduced chi-squared = 0.8215 for 57 degrees of freedom
# Null hypothesis probability = 8.297530e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.920e-09 2.958e-09
25- 50 8.986e-09 5.250e-09
50-150 1.701e-08 1.106e-08
15-150 3.092e-08 1.911e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.17103 (-5.04076 7.04457)
R1^2/D10^2 : 0.823619 (-0.77128 260.117)
kT2 [keV] : 22.4441 (-22.4988 -22.4991)
R2^2/D10^2 : 8.91005E-03 (-0.00881273 0.106044)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.41 using 59 PHA bins.
# Reduced chi-squared = 0.8438 for 55 degrees of freedom
# Null hypothesis probability = 7.885540e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.158e-09 3.286e-09
25- 50 8.995e-09 4.728e-09
50-150 1.705e-08 1.064e-08
15-150 3.120e-08 1.644e-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: 1.36805 ( -0.150897 0.149786 )
Norm@50keV : 1.34954E-03 ( -0.000106631 0.000106569 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.75 using 59 PHA bins.
# Reduced chi-squared = 1.189 for 57 degrees of freedom
# Null hypothesis probability = 1.560134e-01
Photon flux (15-150 keV) in 102.2 sec: 0.163196 ( -0.0135985 0.0136696 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.3417e-06 ( -1.16477e-07 1.17283e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.36472 ( -0.447345 0.184509 )
Epeak [keV] : 1.00000E+04 ( )
Norm@50keV : 1.35458E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.75 using 59 PHA bins.
# Reduced chi-squared = 1.210 for 56 degrees of freedom
# Null hypothesis probability = 1.349474e-01
Photon flux (15-150 keV) in 102.2 sec: 0.163291 ( -0.013757 0.013297 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.34145e-06 ( -1.19349e-07 1.16263e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.03462 ( 1.03367 1.03367 )
beta : -1.36919 ( 1.369 0.151757 )
Epeak [keV] : 55.5555 ( -55.0563 -55.0563 )
Norm@50keV : 2.59569E-03 ( -0.00108163 114763 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.74 using 59 PHA bins.
# Reduced chi-squared = 1.232 for 55 degrees of freedom
# Null hypothesis probability = 1.162101e-01
Photon flux (15-150 keV) in 102.2 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) = 3.92e-07
S(50-100 keV) = 6.14e-07
T90 vs. Hardness ratio plot
T90 = 147.823999941349 sec.
Hardness ratio (energy fluence ratio) = 1.56633
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.2836
Count Ratio (50-100 keV) / (15-25 keV) = 1.02702
Mask shadow pattern
IMX = 2.047849142613579E-01, IMY = -7.513075084194860E-02
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
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 -27.728000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9848 -15.6401 0.2 28.1 -77.8 14.3572 46.4 0.3 Sco X-1
254.3488 35.3609 9.2 56.5 -7.4 1.1874 1.3 5.4 Her X-1
255.9327 -37.7232 4.0 25.6 -132.6 0.6991 2.9 7.7 4U 1700-377
256.4825 -36.5650 2.8 24.4 -131.4 0.9814 4.1 8.8 GX 349+2
263.0305 -24.7297 23.4 12.6 -113.0 -0.1185 -0.5 1.5 GX 1+4
264.6690 -44.5771 16.4 27.9 -153.1 0.1723 0.7 8.3 4U 1735-44
268.4906 -1.3300 3.4 17.5 -7.6 0.6828 3.4 10.4 SW J1753.5-0127
270.2284 -25.0146 2.3 8.1 -140.6 1.0363 5.1 4.9 GX 5-1
270.3556 -25.6826 6.6 8.6 -143.4 0.3678 1.8 4.6 GRS 1758-258
274.0632 -14.0969 1.7 3.8 8.4 1.4732 6.8 4.9 GX 17+2
276.0276 -30.1934 4.3 12.4 -174.8 0.5679 2.7 11.7 H1820-303
285.1489 -24.7347 0.0 12.2 138.3 -0.2982 -1.3 12.7 HT1900.1-2455
288.8620 10.9128 3.1 32.2 39.7 1.2206 3.7 4.2 GRS 1915+105
262.9891 -33.8347 71.8 18.9 -137.7 -0.0371 -0.2 0.0 GX 354-0
311.9258 -43.3143 2.8 40.6 149.1 1.7906 4.2 ------ UNKNOWN
266.3075 -26.3993 0.6 11.3 -128.4 4.1098 19.3 ------ UNKNOWN
257.9996 -41.5350 2.4 27.5 -140.8 1.1933 4.9 ------ UNKNOWN
240.7500 25.1020 2.2 54.0 -26.1 3.8604 5.3 ------ UNKNOWN
237.8392 -24.5752 2.7 34.6 -95.5 1.8577 4.3 ------ UNKNOWN
232.7300 10.6781 2.2 50.0 -46.3 5.4235 5.1 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-27.728000 74.500590
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9474 -15.5573 5.5 28.2 -77.6 -0.4228 -2.1 5.3 Sco X-1
254.5095 35.2169 216.3 56.3 -7.3 0.0291 0.1 7.9 Her X-1
255.8831 -37.9869 7.3 25.8 -132.9 0.2655 1.6 9.9 4U 1700-377
256.5510 -36.5639 5.6 24.4 -131.5 -0.3370 -2.0 10.1 GX 349+2
263.1961 -24.8707 7.8 12.5 -113.9 0.1960 1.5 12.7 GX 1+4
264.5771 -44.5657 7.0 27.9 -153.0 -0.2537 -1.6 9.9 4U 1735-44
268.4633 -1.2804 5.5 17.5 -7.7 -0.2698 -2.1 11.8 SW J1753.5-0127
270.0912 -24.9591 0.0 8.1 -139.7 0.2806 2.2 12.7 GX 5-1
270.4119 -25.8770 7.0 8.8 -144.3 0.2185 1.7 10.0 GRS 1758-258
273.9557 -13.8934 8.4 4.0 7.1 0.1729 1.4 9.1 GX 17+2
276.0516 -30.1887 0.0 12.4 -174.9 -0.1826 -1.4 12.5 H1820-303
285.1811 -24.8407 5.5 12.3 138.6 0.2897 2.1 9.2 HT1900.1-2455
288.7030 10.7890 0.0 32.0 39.6 0.2913 1.4 10.9 GRS 1915+105
262.9977 -33.6869 6.9 18.8 -137.4 0.2338 1.7 8.9 GX 354-0
276.0326 -5.6675 0.7 12.3 20.1 2.1447 16.8 ------ UNKNOWN
257.4081 31.3336 2.1 51.8 -6.3 1.8016 5.4 ------ UNKNOWN
260.9506 -65.0455 2.3 48.0 -160.4 1.3800 5.1 ------ UNKNOWN
242.4937 -25.2199 2.4 30.4 -97.5 1.0620 4.8 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
110.300580 963.014400
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9821 -15.6376 0.3 32.1 -107.1 53.3118 46.0 0.2 Sco X-1
254.5883 35.5218 5.6 45.8 -21.0 -2.8320 -2.1 12.5 Her X-1
255.9040 -37.8352 2.3 37.0 -149.6 4.1299 5.0 3.9 4U 1700-377
256.5129 -36.5156 3.5 35.7 -149.0 2.5839 3.3 6.7 GX 349+2
262.9655 -24.7785 5.0 22.9 -144.6 1.6424 2.3 3.1 GX 1+4
264.8723 -44.3759 30.4 39.9 -164.0 0.3265 0.4 7.1 4U 1735-44
268.3239 -1.4594 4.0 8.8 -58.1 1.6477 2.9 2.7 SW J1753.5-0127
270.3060 -25.0576 2.0 20.2 -161.3 3.6318 5.7 1.8 GX 5-1
270.2449 -25.6898 3.1 20.8 -161.6 2.3880 3.8 4.5 GRS 1758-258
273.9866 -14.0712 1.5 8.6 -163.2 4.8873 7.9 2.4 GX 17+2
276.0200 -30.2914 4.1 24.6 -176.4 1.9893 2.8 6.7 H1820-303
284.8769 -24.8872 47.2 21.0 160.6 -0.1826 -0.2 8.9 HT1900.1-2455
288.8308 10.8912 1.7 20.9 41.1 4.8371 6.7 3.8 GRS 1915+105
299.4305 35.3052 43.9 46.5 30.1 -0.5154 -0.3 10.0 Cyg X-1
263.0652 -33.9862 16.5 30.8 -155.1 0.4825 0.7 9.9 GX 354-0
290.7098 33.1168 3.7 41.2 22.3 3.4756 3.1 ------ UNKNOWN
288.7455 40.9086 3.7 48.0 16.5 4.7167 3.1 ------ UNKNOWN
266.2903 -26.4080 0.5 22.7 -153.4 16.0981 22.6 ------ UNKNOWN
266.5957 -32.2195 1.4 28.0 -159.3 5.6586 8.2 ------ UNKNOWN
239.9101 -52.4275 2.8 55.4 -150.6 11.2572 4.1 ------ UNKNOWN
235.2715 15.9230 2.5 45.8 -57.7 11.9831 4.5 ------ UNKNOWN
Plot creation:
Sat May 30 18:13:00 EDT 2015