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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
276.8075 -55.5562 0.0122 51.1079 14.2302 2.5505097 15.799 TRIG_00598284
Foreground time interval of the image:
-0.196 14.301 (delta_t = 14.497 [sec])
Background time interval of the image:
-239.800 -0.196 (delta_t = 239.604 [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 -0.196 sec. to 120.176 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.55681 ( -0.164168 0.164956 )
Norm@50keV : 2.35195E-03 ( -0.000216091 0.000215592 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.55 using 59 PHA bins.
# Reduced chi-squared = 0.8167 for 57 degrees of freedom
# Null hypothesis probability = 8.370117e-01
Photon flux (15-150 keV) in 120.4 sec: 0.298332 ( -0.0288433 0.029004 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.66327e-06 ( -2.59976e-07 2.61207e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.196 sec. to 120.176 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.55443 ( -0.582068 1.05556 )
Epeak [keV] : 9983.35 ( )
Norm@50keV : 2.35830E-03 ( -0.00147807 0.00251549 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.55 using 59 PHA bins.
# Reduced chi-squared = 0.8312 for 56 degrees of freedom
# Null hypothesis probability = 8.118712e-01
Photon flux (15-150 keV) in 120.4 sec: 0.297573 ( -0.030214 0.029536 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.65138e-06 ( -2.69407e-07 2.72393e-07 ) ergs/cm2
Band function
Time interval is from -0.196 sec. to 120.176 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.29209 ( 1.29209 1.29209 )
beta : -1.55681 ( 1.55681 0.164248 )
Epeak [keV] : 29.3170 ( -29.317 -29.317 )
Norm@50keV : 4.57987E-03 ( -0.0024416 185.115 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.55 using 59 PHA bins.
# Reduced chi-squared = 0.8464 for 55 degrees of freedom
# Null hypothesis probability = 7.842048e-01
Photon flux (15-150 keV) in 120.4 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] : 16.2665 (-1.90896 2.20885)
R^2/D10^2 : 2.44579E-02 (-0.00885025 0.0137146)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 80.90 using 59 PHA bins.
# Reduced chi-squared = 1.419 for 57 degrees of freedom
# Null hypothesis probability = 2.040746e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.605e-07 2.980e-08
25- 50 6.849e-07 9.903e-08
50-150 1.275e-06 2.149e-07
15-150 2.120e-06 2.733e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.357 (-63.9398 -199.361)
Norm : 1.21210 (-0.109991 0.110235)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.23 using 59 PHA bins.
# Reduced chi-squared = 0.8286 for 57 degrees of freedom
# Null hypothesis probability = 8.185942e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.634e-07 4.310e-08
25- 50 6.990e-07 1.696e-07
50-150 1.533e-06 6.656e-07
15-150 2.596e-06 8.205e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.71159 (-1.56859 2.0661)
R1^2/D10^2 : 0.671750 (-0.457242 1.92833)
kT2 [keV] : 24.4800 (-4.55689 8.15926)
R2^2/D10^2 : 4.97031E-03 (-0.00317775 0.00412697)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.74 using 59 PHA bins.
# Reduced chi-squared = 0.8498 for 55 degrees of freedom
# Null hypothesis probability = 7.782515e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.885e-07 1.883e-07
25- 50 6.445e-07 2.035e-07
50-150 1.597e-06 5.491e-07
15-150 2.630e-06 7.754e-07
Peak spectrum fit
Power-law model
Time interval is from 0.004 sec. to 1.004 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.35842 ( -0.124817 0.124748 )
Norm@50keV : 9.04534E-02 ( -0.00710032 0.00710019 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.81 using 59 PHA bins.
# Reduced chi-squared = 1.084 for 57 degrees of freedom
# Null hypothesis probability = 3.083586e-01
Photon flux (15-150 keV) in 1 sec: 10.9161 ( -0.905434 0.907528 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.81784e-07 ( -7.29442e-08 7.30596e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.004 sec. to 1.004 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.529779 ( -0.645502 0.560671 )
Epeak [keV] : 100.377 ( -21.8836 88.1868 )
Norm@50keV : 0.216936 ( -0.09521 0.200754 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.12 using 59 PHA bins.
# Reduced chi-squared = 0.9843 for 56 degrees of freedom
# Null hypothesis probability = 5.080341e-01
Photon flux (15-150 keV) in 1 sec: 10.6409 ( -0.92353 0.9269 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.67389e-07 ( -7.5528e-08 7.5209e-08 ) ergs/cm2
Band function
Time interval is from 0.004 sec. to 1.004 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.534260 ( -0.482887 0.423635 )
beta : -9.35885 ( 9.36933 19.3693 )
Epeak [keV] : 100.796 ( -16.2232 73.9543 )
Norm@50keV : 0.215585 ( -0.0938698 0.0600099 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.12 using 59 PHA bins.
# Reduced chi-squared = 1.002 for 55 degrees of freedom
# Null hypothesis probability = 4.699402e-01
Photon flux (15-150 keV) in 1 sec: 10.6499 ( ) 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] : 18.0892 (-1.50325 1.68157)
R^2/D10^2 : 0.715220 (-0.192071 0.252959)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.90 using 59 PHA bins.
# Reduced chi-squared = 1.297 for 57 degrees of freedom
# Null hypothesis probability = 6.548150e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.678e-08 6.530e-09
25- 50 2.172e-07 2.310e-08
50-150 5.165e-07 6.285e-08
15-150 7.804e-07 7.485e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 46.1264 (-3.64005 3.6396)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.30 using 59 PHA bins.
# Reduced chi-squared = 1.163 for 57 degrees of freedom
# Null hypothesis probability = 1.868199e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.149e-07 1.135e-08
25- 50 2.210e-07 2.560e-08
50-150 4.847e-07 1.247e-07
15-150 8.206e-07 1.568e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.09990 (-1.83276 7.80313)
R1^2/D10^2 : 23.1071 (-21.4387 82.0504)
kT2 [keV] : 21.6522 (-2.75802 21.8367)
R2^2/D10^2 : 0.347249 (-0.325196 0.24958)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.73 using 59 PHA bins.
# Reduced chi-squared = 1.031 for 55 degrees of freedom
# Null hypothesis probability = 4.103861e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.113e-08 3.790e-08
25- 50 2.006e-07 4.760e-08
50-150 5.583e-07 9.870e-08
15-150 8.501e-07 1.681e-07
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: 1.67656 ( -0.179166 0.181631 )
Norm@50keV : 1.20506E-02 ( -0.00124635 0.00124183 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.36 using 59 PHA bins.
# Reduced chi-squared = 0.8485 for 57 degrees of freedom
# Null hypothesis probability = 7.853647e-01
Photon flux (15-150 keV) in 14.5 sec: 1.58757 ( -0.174066 0.175008 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.62101e-06 ( -1.73536e-07 1.74362e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.55229 ( -0.750752 0.301613 )
Epeak [keV] : 190.668 ( -190.668 -190.668 )
Norm@50keV : 1.38453E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.27 using 59 PHA bins.
# Reduced chi-squared = 0.8619 for 56 degrees of freedom
# Null hypothesis probability = 7.591777e-01
Photon flux (15-150 keV) in 14.5 sec: 1.57715 ( -0.18242 0.18154 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.61211e-06 ( -1.82799e-07 1.80148e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.42348 ( 1.44421 1.44421 )
beta : -1.77584 ( 1.77136 0.270279 )
Epeak [keV] : 107.782 ( -120.475 -120.475 )
Norm@50keV : 1.62853E-02 ( -0.00455728 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.26 using 59 PHA bins.
# Reduced chi-squared = 0.8775 for 55 degrees of freedom
# Null hypothesis probability = 7.279556e-01
Photon flux (15-150 keV) in 14.5 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) = 6.77e-07
S(50-100 keV) = 9.20e-07
T90 vs. Hardness ratio plot
T90 = 111.103999972343 sec.
Hardness ratio (energy fluence ratio) = 1.35894
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.31986
Count Ratio (50-100 keV) / (15-25 keV) = 1.1147
Mask shadow pattern
IMX = 1.201626225300685E+00, IMY = -3.047330864359771E-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:
-239.800000 -0.196000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
245.0185 -15.5481 1.0 37.3 81.2 8.2223 11.3 6.0 Sco X-1
254.4440 35.4139 2.9 47.3 160.9 2.5486 3.9 4.3 Her X-1
256.0467 -37.7470 1.2 40.4 42.3 5.2208 10.0 6.5 4U 1700-377
256.4653 -36.4078 5.8 39.1 43.3 0.9450 2.0 1.7 GX 349+2
262.9656 -24.8885 7.4 26.9 50.1 0.4649 1.6 8.9 GX 1+4
264.6541 -44.3550 6.3 42.4 28.7 0.8393 1.8 6.9 4U 1735-44
268.3678 -1.4734 7.4 13.3 114.1 0.3503 1.6 1.3 SW J1753.5-0127
270.3326 -25.0275 2.6 23.0 37.1 1.0874 4.4 4.1 GX 5-1
270.4489 -25.7466 4.2 23.6 36.0 0.6893 2.8 7.9 GRS 1758-258
274.1001 -13.9288 2.9 11.7 47.6 0.8769 4.0 8.5 GX 17+2
275.9258 -30.3615 11.3 26.3 21.5 0.2406 1.0 0.3 H1820-303
285.1716 -24.9622 14.8 20.7 1.0 0.1712 0.8 7.8 HT1900.1-2455
288.8222 11.0269 1.1 17.3 -143.4 2.5000 10.3 5.1 GRS 1915+105
299.6301 35.2796 0.8 43.4 -147.1 6.3977 14.3 5.1 Cyg X-1
308.1484 40.8270 32.8 51.6 -143.2 0.3652 0.4 7.7 Cyg X-3
262.8173 -33.8036 5.5 33.9 39.1 -0.7765 -2.1 8.8 GX 354-0
251.4174 -8.9725 2.4 30.0 90.9 1.9994 4.8 ------ UNKNOWN
309.1816 44.7055 9.6 55.3 -145.1 1.8582 1.2 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-0.196000 14.300730
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.8321 -15.7173 4.3 37.5 81.0 0.4005 2.7 9.7 Sco X-1
254.5610 35.4731 12.3 47.2 161.1 -0.1135 -0.9 9.3 Her X-1
255.8226 -37.8679 7.7 40.6 42.4 -0.1732 -1.5 7.9 4U 1700-377
256.5127 -36.3734 7.4 39.1 43.3 0.1641 1.5 4.8 GX 349+2
262.8248 -24.6139 5.3 26.8 50.7 0.1257 2.2 12.8 GX 1+4
264.5278 -44.2996 0.0 42.4 28.8 -0.1098 -1.2 12.9 4U 1735-44
268.2333 -1.5508 8.9 13.4 113.6 0.0571 1.3 10.0 SW J1753.5-0127
270.1207 -25.0616 10.0 23.1 37.5 -0.0553 -1.2 8.9 GX 5-1
270.4302 -25.5850 0.0 23.4 36.2 0.0259 0.5 11.7 GRS 1758-258
274.0078 -14.1862 6.6 12.0 47.2 -0.0765 -1.7 9.0 GX 17+2
275.7837 -30.4405 5.4 26.4 21.7 -0.1079 -2.1 8.5 H1820-303
284.9187 -24.9485 5.0 20.7 1.6 -0.0995 -2.3 6.6 HT1900.1-2455
288.6995 10.7800 11.6 17.0 -143.4 0.0431 1.0 11.5 GRS 1915+105
299.5344 35.2021 17.0 43.3 -147.1 0.0543 0.7 2.7 Cyg X-1
307.9570 40.9336 10.5 51.6 -143.4 0.1739 1.1 7.0 Cyg X-3
262.9519 -33.8700 6.4 33.9 38.9 0.1336 1.8 2.8 GX 354-0
276.8075 -55.5562 0.7 51.1 14.2 2.5505 15.8 ------ UNKNOWN
295.6500 34.0154 2.5 40.9 -150.7 0.3036 4.7 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
86.700590 962.234000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.6770 -60.5833 7.0 50.0 15.9 2.8106 1.7 10.9 Cen X-3
186.5134 -62.7928 4.5 42.8 20.2 2.9657 2.5 4.2 GX 301-2
255.9754 -37.8345 0.4 22.6 111.2 22.7705 30.1 0.8 4U 1700-377
256.4569 -36.4925 3.4 23.6 113.8 2.6884 3.4 4.3 GX 349+2
262.9999 -24.6710 5.1 32.6 134.3 2.3564 2.3 4.5 GX 1+4
264.7140 -44.6084 8.9 13.4 118.2 0.8495 1.3 9.6 4U 1735-44
270.3266 -25.0501 4.2 31.0 146.6 2.4592 2.7 2.9 GX 5-1
270.3533 -25.7905 2.2 30.2 146.4 4.7888 5.2 4.0 GRS 1758-258
274.0276 -14.0898 5.0 41.6 153.9 3.6029 2.3 3.4 GX 17+2
275.7394 -30.3838 6.8 25.3 155.9 1.2808 1.7 9.7 H1820-303
285.0031 -24.8830 5.0 31.4 172.4 1.7400 2.3 2.9 HT1900.1-2455
263.1737 -33.7577 7.2 23.8 129.0 1.1613 1.6 10.3 GX 354-0
266.1693 -28.7477 1.9 28.0 137.8 4.8197 5.9 ------ UNKNOWN
256.7784 -45.0019 2.6 16.5 99.7 2.8512 4.5 ------ UNKNOWN
277.3329 -23.8112 2.9 31.9 158.9 3.7237 4.0 ------ UNKNOWN
278.5908 -32.3578 3.2 23.3 161.9 2.4480 3.6 ------ UNKNOWN
181.3127 -73.4057 2.7 39.1 4.7 3.9804 4.2 ------ UNKNOWN
322.7008 -15.5385 4.0 53.2 -142.2 14.9497 2.9 ------ UNKNOWN
Plot creation:
Sat May 30 13:37:48 EDT 2015