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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
236.4307 -3.6397 0.0060 31.2072 94.9614 7.9157465 31.790 TRIG_00205851
Foreground time interval of the image:
-82.456 11.957 (delta_t = 94.413 [sec])
Background time interval of the image:
-239.344 -82.456 (delta_t = 156.888 [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 -82.456 sec. to 136.620 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.68100 ( -0.0563754 0.0565556 )
Norm@50keV : 4.13366E-03 ( -0.000119507 0.00011936 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.35 using 59 PHA bins.
# Reduced chi-squared = 1.041 for 57 degrees of freedom
# Null hypothesis probability = 3.898786e-01
Photon flux (15-150 keV) in 219.1 sec: 0.545402 ( -0.0174575 0.0175305 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.39878e-06 ( -2.52254e-07 2.52721e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -82.456 sec. to 136.620 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.55263 ( -0.225666 0.16272 )
Epeak [keV] : 182.819 ( -112.15 -182.827 )
Norm@50keV : 4.75657E-03 ( -0.000708026 0.00129188 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.33 using 59 PHA bins.
# Reduced chi-squared = 1.042 for 56 degrees of freedom
# Null hypothesis probability = 3.897251e-01
Photon flux (15-150 keV) in 219.1 sec: 0.539536 ( -0.019799 0.009967 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.31401e-06 ( -2.92718e-07 2.87722e-07 ) ergs/cm2
Band function
Time interval is from -82.456 sec. to 136.620 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.459672 ( -0.671746 -0.671746 )
beta : -1.71811 ( 1.71423 0.0699246 )
Epeak [keV] : 36.7815 ( -36.7697 159.691 )
Norm@50keV : 2.78506E-02 ( -0.0277998 477.106 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.14 using 59 PHA bins.
# Reduced chi-squared = 1.039 for 55 degrees of freedom
# Null hypothesis probability = 3.956894e-01
Photon flux (15-150 keV) in 219.1 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] : 14.8131 ( )
R^2/D10^2 : 5.84565E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 325.94 using 59 PHA bins.
# Reduced chi-squared = 5.7182 for 57 degrees of freedom
# Null hypothesis probability = 2.382853e-39
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.896e-07 3.648e-08
25- 50 2.315e-06 8.107e-08
50-150 3.438e-06 1.906e-07
15-150 6.343e-06 2.005e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 152.416 ( )
Norm : 2.21033 (-0.0894358 0.0820329)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.32 using 59 PHA bins.
# Reduced chi-squared = 1.093 for 57 degrees of freedom
# Null hypothesis probability = 2.926370e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.222e-06 6.913e-08
25- 50 2.286e-06 1.418e-07
50-150 4.629e-06 1.099e-06
15-150 8.137e-06 1.215e-06
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.82560 (-0.719845 0.803154)
R1^2/D10^2 : 0.658091 (-0.211527 0.336996)
kT2 [keV] : 25.3870 (-2.56259 3.48902)
R2^2/D10^2 : 6.70222E-03 (-0.00251308 0.00331175)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.50 using 59 PHA bins.
# Reduced chi-squared = 1.227 for 55 degrees of freedom
# Null hypothesis probability = 1.200838e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.214e-06 1.238e-07
25- 50 2.302e-06 1.528e-07
50-150 4.652e-06 4.031e-07
15-150 8.167e-06 4.941e-07
Peak spectrum fit
Power-law model
Time interval is from 27.452 sec. to 28.452 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.49841 ( -0.0885831 0.0891434 )
Norm@50keV : 5.25714E-02 ( -0.00259986 0.00259292 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.68 using 59 PHA bins.
# Reduced chi-squared = 0.9593 for 57 degrees of freedom
# Null hypothesis probability = 5.625071e-01
Photon flux (15-150 keV) in 1 sec: 6.56017 ( -0.333336 0.333952 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.98849e-07 ( -2.68248e-08 2.69267e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 27.452 sec. to 28.452 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.31253 ( -0.360116 0.231006 )
Epeak [keV] : 194.982 ( )
Norm@50keV : 6.46111E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.80 using 59 PHA bins.
# Reduced chi-squared = 0.9608 for 56 degrees of freedom
# Null hypothesis probability = 5.584751e-01
Photon flux (15-150 keV) in 1 sec: 6.49121 ( -0.35452 0.35479 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.92983e-07 ( -2.9274e-08 2.9079e-08 ) ergs/cm2
Band function
Time interval is from 27.452 sec. to 28.452 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.28372 ( 1.28346 1.19725 )
beta : -1.69764 ( 1.68588 0.258403 )
Epeak [keV] : 170.274 ( -170.848 -170.848 )
Norm@50keV : 6.68932E-02 ( -0.0130801 4.9321 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.73 using 59 PHA bins.
# Reduced chi-squared = 0.9768 for 55 degrees of freedom
# Null hypothesis probability = 5.234282e-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] : 15.9165 ( )
R^2/D10^2 : 0.594370 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 146.73 using 59 PHA bins.
# Reduced chi-squared = 2.5742 for 57 degrees of freedom
# Null hypothesis probability = 7.572516e-10
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.117e-08 3.170e-09
25- 50 1.306e-07 8.100e-09
50-150 2.307e-07 2.220e-08
15-150 3.925e-07 2.345e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 26.8510 (-1.30515 1.30514)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.03 using 59 PHA bins.
# Reduced chi-squared = 0.9830 for 57 degrees of freedom
# Null hypothesis probability = 5.113971e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.686e-08 3.425e-09
25- 50 1.286e-07 7.250e-09
50-150 2.821e-07 1.530e-08
15-150 4.776e-07 2.685e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.26841 (-1.18317 1.4569)
R1^2/D10^2 : 9.34830 (-4.78245 11.4823)
kT2 [keV] : 24.5082 (-3.17393 4.9399)
R2^2/D10^2 : 0.110790 (-0.0544199 0.0749424)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.41 using 59 PHA bins.
# Reduced chi-squared = 1.062 for 55 degrees of freedom
# Null hypothesis probability = 3.511168e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.352e-08 1.430e-08
25- 50 1.224e-07 1.660e-08
50-150 2.991e-07 4.335e-08
15-150 4.850e-07 6.780e-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: 1.55242 ( -0.0771666 0.0772871 )
Norm@50keV : 5.09884E-03 ( -0.000210013 0.000209728 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.41 using 59 PHA bins.
# Reduced chi-squared = 1.077 for 57 degrees of freedom
# Null hypothesis probability = 3.211195e-01
Photon flux (15-150 keV) in 94.41 sec: 0.645936 ( -0.0283959 0.0284856 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.53023e-06 ( -1.99094e-07 1.9973e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.40928 ( -0.311718 0.188366 )
Epeak [keV] : 214.751 ( -214.756 -214.756 )
Norm@50keV : 5.97840E-03 ( -0.00104705 0.00239996 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.72 using 59 PHA bins.
# Reduced chi-squared = 1.084 for 56 degrees of freedom
# Null hypothesis probability = 3.096575e-01
Photon flux (15-150 keV) in 94.41 sec: 0.639631 ( -0.030997 0.030165 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.48102e-06 ( -2.26178e-07 2.18323e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 2.42296E-02 ( 0.848623 0.848623 )
beta : -1.60870 ( 1.59867 0.0982589 )
Epeak [keV] : 37.3805 ( -37.2414 165.845 )
Norm@50keV : 6.04379E-02 ( -0.060174 409.406 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.27 using 59 PHA bins.
# Reduced chi-squared = 1.078 for 55 degrees of freedom
# Null hypothesis probability = 3.228144e-01
Photon flux (15-150 keV) in 94.41 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) = 2.26e-06
S(50-100 keV) = 2.81e-06
T90 vs. Hardness ratio plot
T90 = 109.080000013113 sec.
Hardness ratio (energy fluence ratio) = 1.24336
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.23375
Count Ratio (50-100 keV) / (15-25 keV) = 0.866281
Mask shadow pattern
IMX = -5.239178584497276E-02, IMY = -6.035240817613787E-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:
-239.344000 -82.456000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9781 -15.6278 0.3 23.9 67.1 6.8594 35.8 0.8 Sco X-1
254.3211 35.3424 6.2 43.9 165.2 0.5819 1.9 6.7 Her X-1
255.9455 -37.8894 3.4 32.9 18.0 0.6284 3.4 3.3 4U 1700-377
256.3866 -36.3937 5.3 31.4 18.4 0.3623 2.2 2.9 GX 349+2
262.9669 -24.5953 4.1 18.4 14.4 0.3776 2.8 9.3 GX 1+4
264.7473 -44.5106 9.5 37.9 4.2 0.2643 1.2 3.6 4U 1735-44
268.3036 -1.5047 4.6 5.3 -171.6 0.3654 2.5 5.0 SW J1753.5-0127
270.3350 -25.0962 2.5 18.6 -6.9 0.7062 4.6 2.9 GX 5-1
270.2648 -25.7389 3.3 19.2 -6.4 0.5427 3.6 2.1 GRS 1758-258
273.8524 -14.0349 13.0 9.5 -38.5 0.1252 0.9 8.9 GX 17+2
275.9071 -30.4166 3.0 24.9 -16.3 0.6043 3.8 3.1 H1820-303
285.0994 -24.8645 7.0 24.7 -39.9 0.2632 1.6 4.8 HT1900.1-2455
288.7798 10.9541 1.4 27.5 -129.0 1.3882 8.1 1.2 GRS 1915+105
299.6208 35.1701 1.4 51.6 -145.6 4.0054 8.2 2.4 Cyg X-1
263.0387 -33.8458 3.7 27.5 9.2 0.4696 3.1 2.6 GX 354-0
251.4811 44.0414 2.6 52.8 166.4 2.5274 4.5 ------ UNKNOWN
253.2473 -39.2713 2.4 35.0 20.4 0.9961 4.8 ------ UNKNOWN
289.2056 -24.2070 2.9 27.1 -46.6 0.7304 4.0 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-82.456000 11.956590
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
245.1284 -15.7938 0.0 23.8 66.6 0.1845 1.0 12.6 Sco X-1
254.3420 35.4568 8.5 44.0 165.3 -0.3538 -1.4 8.9 Her X-1
255.8224 -37.9600 44.0 33.0 18.1 -0.0445 -0.3 10.4 4U 1700-377
256.5441 -36.4667 83.6 31.4 18.1 0.0217 0.1 5.9 GX 349+2
263.1481 -24.7875 4.0 18.6 13.7 -0.3561 -2.9 8.0 GX 1+4
264.9118 -44.6026 0.0 38.0 4.0 -0.1689 -0.9 11.7 4U 1735-44
268.5148 -1.3003 0.0 5.5 -169.7 0.0381 0.3 12.7 SW J1753.5-0127
270.1294 -25.1772 6.0 18.6 -6.2 -0.2528 -1.9 10.3 GX 5-1
270.4561 -25.5882 0.0 19.1 -7.0 0.1534 1.2 12.5 GRS 1758-258
274.0191 -13.8866 3.0 9.5 -39.9 0.4754 3.9 9.0 GX 17+2
275.7941 -30.4320 9.4 24.9 -16.0 0.1580 1.2 7.8 H1820-303
284.9257 -24.9459 4.6 24.6 -39.4 0.3365 2.5 6.2 HT1900.1-2455
288.6570 10.8600 5.9 27.3 -129.0 -0.2746 -2.0 9.8 GRS 1915+105
299.6120 35.0867 8.4 51.5 -145.5 -0.5809 -1.4 7.0 Cyg X-1
263.0509 -33.9860 5.3 27.6 9.1 -0.3070 -2.2 9.6 GX 354-0
236.4307 -3.6397 0.4 31.2 95.0 7.9173 31.8 ------ UNKNOWN
271.0559 -42.6712 2.9 36.1 -3.4 0.6795 4.0 ------ UNKNOWN
309.6710 -18.6791 1.7 42.6 -68.7 2.9783 6.6 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
66.956610 962.700700
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9814 -15.6313 0.1 14.6 -19.5 41.8577 81.9 0.5 Sco X-1
254.4296 35.4641 24.5 42.6 -143.3 0.4481 0.5 7.4 Her X-1
256.0316 -37.8175 2.1 38.6 -10.2 3.8914 5.6 2.7 4U 1700-377
256.4971 -36.3853 1.9 37.6 -12.0 4.0038 6.0 3.7 GX 349+2
263.0814 -24.6629 5.2 33.2 -33.2 1.3638 2.2 6.3 GX 1+4
264.8293 -44.3251 7.7 47.7 -12.4 1.6075 1.5 8.4 4U 1735-44
268.3106 -1.4618 9.7 31.9 -78.2 1.1075 1.2 3.5 SW J1753.5-0127
270.2353 -25.0214 2.6 38.9 -38.5 3.7457 4.5 4.4 GX 5-1
270.3915 -25.6288 3.1 39.3 -37.7 3.0498 3.7 8.4 GRS 1758-258
273.8968 -13.9921 3.8 38.4 -57.0 3.0965 3.0 6.9 GX 17+2
275.9481 -30.3265 5.5 45.8 -35.0 2.1694 2.1 2.7 H1820-303
263.1204 -33.7780 8.7 39.1 -21.4 1.0387 1.3 7.4 GX 354-0
236.4629 -3.6669 2.3 0.0 -23.4 2.5251 4.9 ------ UNKNOWN
242.4398 -12.6261 3.2 10.8 -18.1 1.7041 3.6 ------ UNKNOWN
265.4115 4.4208 3.3 30.0 -90.4 2.9733 3.5 ------ UNKNOWN
Plot creation:
Sun May 31 13:41:31 EDT 2015