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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
319.6798 -34.8652 0.0396 24.5786 121.4265 1.1257401 4.837 TRIG_00655721
Foreground time interval of the image:
-63.000 72.301 (delta_t = 135.301 [sec])
Background time interval of the image:
-239.000 -63.000 (delta_t = 176.000 [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
8 ms binning
From T100_start-3 s to T100_start+3 s
2 ms binning
From T100_start-1 s to T100_start+1 s
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 -63.000 sec. to 113.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.47391 ( -0.393281 0.460319 )
Norm@50keV : 4.22275E-04 ( -0.000137072 0.000136467 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.27 using 59 PHA bins.
# Reduced chi-squared = 0.9346 for 57 degrees of freedom
# Null hypothesis probability = 6.156998e-01
Photon flux (15-150 keV) in 176 sec: 8.16461E-02 ( -0.0148077 0.0148184 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.38084e-07 ( -1.73251e-07 1.85798e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -63.000 sec. to 113.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.92200 ( )
Epeak [keV] : 4.81596 ( )
Norm@50keV : 9.66988E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.51 using 59 PHA bins.
# Reduced chi-squared = 0.9556 for 56 degrees of freedom
# Null hypothesis probability = 5.695194e-01
Photon flux (15-150 keV) in 176 sec: 8.16143E-02 ( -0.0150325 0.0147368 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.38047e-07 ( -2.24724e-07 1.83015e-07 ) ergs/cm2
Band function
Time interval is from -63.000 sec. to 113.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.02476 ( 1.63913 1.63913 )
beta : -2.54053 ( 2.71035 0.615404 )
Epeak [keV] : 16.9610 ( -12.5666 36.2432 )
Norm@50keV : 202.208 ( -202.207 387458 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.98 using 59 PHA bins.
# Reduced chi-squared = 0.9632 for 55 degrees of freedom
# Null hypothesis probability = 5.523458e-01
Photon flux (15-150 keV) in 176 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] : 6.58155 (-1.2505 1.51554)
R^2/D10^2 : 0.197016 (-0.114493 0.287759)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.77 using 59 PHA bins.
# Reduced chi-squared = 1.013 for 57 degrees of freedom
# Null hypothesis probability = 4.466438e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.253e-07 9.337e-08
25- 50 2.730e-07 8.738e-08
50-150 3.600e-08 2.408e-08
15-150 5.343e-07 1.855e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 29.7765 (-11.2242 22.0526)
Norm : 0.655301 (-0.229214 0.404241)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.02 using 59 PHA bins.
# Reduced chi-squared = 0.9478 for 57 degrees of freedom
# Null hypothesis probability = 5.874847e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.338e-07 6.242e-08
25- 50 2.661e-07 7.955e-08
50-150 1.443e-07 9.851e-08
15-150 6.442e-07 1.865e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.62227 (-3.90502 1.67441)
R1^2/D10^2 : 0.347892 (-0.173542 0.337442)
kT2 [keV] : 30.6881 (-29.0465 -30.7686)
R2^2/D10^2 : 2.74156E-04 (-0.000270022 0.132377)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.09 using 59 PHA bins.
# Reduced chi-squared = 0.9652 for 55 degrees of freedom
# Null hypothesis probability = 5.480521e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.398e-07 1.327e-07
25- 50 2.445e-07 1.362e-07
50-150 3.016e-07 1.877e-07
15-150 7.859e-07 3.817e-07
Peak spectrum fit
Power-law model
Time interval is from 40.500 sec. to 41.500 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.21818 ( -2.21558 -2.21558 )
Norm@50keV : 1.07750E-03 ( -0.00107796 0.00154959 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.10 using 59 PHA bins.
# Reduced chi-squared = 0.9842 for 57 degrees of freedom
# Null hypothesis probability = 5.089292e-01
Photon flux (15-150 keV) in 1 sec: 0.179936 ( -0.180259 0.198517 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.02326e-08 ( -1.0113e-08 1.44079e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 40.500 sec. to 41.500 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.58927 ( )
Epeak [keV] : 45.3095 ( )
Norm@50keV : 0.105421 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.42 using 59 PHA bins.
# Reduced chi-squared = 0.9897 for 56 degrees of freedom
# Null hypothesis probability = 4.966656e-01
Photon flux (15-150 keV) in 1 sec: 0.169994 ( -0.169994 0.202402 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.05906e-08 ( -1.05906e-08 1.30276e-08 ) ergs/cm2
Band function
Time interval is from 40.500 sec. to 41.500 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.75671 ( -4.75671 -4.75671 )
beta : -9.37167 ( 9.37167 9.37167 )
Epeak [keV] : 48.9554 ( -48.9554 87.3692 )
Norm@50keV : 2.49721 ( -2.49721 3.41883e+07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.48 using 59 PHA bins.
# Reduced chi-squared = 1.009 for 55 degrees of freedom
# Null hypothesis probability = 4.565219e-01
Photon flux (15-150 keV) in 1 sec: 0.185696 ( 6.8143 -0.185696 ) 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] : 11.7510 (-10.556 24.2457)
R^2/D10^2 : 5.55094E-02 (-0.0556808 23261.9)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.40 using 59 PHA bins.
# Reduced chi-squared = 0.9720 for 57 degrees of freedom
# Null hypothesis probability = 5.352424e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.618e-09 1.254e-09
25- 50 4.967e-09 3.452e-09
50-150 4.065e-09 4.565e-09
15-150 1.065e-08 8.800e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 53.9422 (-52.2789 -52.2789)
Norm : 1.04898 (-1.09623 -1.09623)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.78 using 59 PHA bins.
# Reduced chi-squared = 0.9785 for 57 degrees of freedom
# Null hypothesis probability = 5.210637e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.607e-09 1.993e-09
25- 50 3.843e-09 3.198e-09
50-150 4.001e-09 3.837e-09
15-150 1.045e-08 1.030e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.28710 (-2.00093 -2.00093)
R1^2/D10^2 : 104.112 (-59.4557 8.96232e+10)
kT2 [keV] : 11.6885 (-12.3308 -12.3308)
R2^2/D10^2 : 5.65989E-02 (-0.0431406 -0.0431406)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.40 using 59 PHA bins.
# Reduced chi-squared = 1.007 for 55 degrees of freedom
# Null hypothesis probability = 4.595673e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.640e-09 1.282e-09
25- 50 4.975e-09 4.258e-09
50-150 4.014e-09 3.870e-09
15-150 1.063e-08 9.175e-09
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: 2.44192 ( -0.415655 0.48921 )
Norm@50keV : 4.66181E-04 ( -0.00016037 0.000159862 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.97 using 59 PHA bins.
# Reduced chi-squared = 0.8942 for 57 degrees of freedom
# Null hypothesis probability = 6.994390e-01
Photon flux (15-150 keV) in 135.3 sec: 8.84185E-02 ( -0.0175534 0.0175647 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.21381e-07 ( -1.57987e-07 1.70486e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.91585 ( )
Epeak [keV] : 5.24371 ( )
Norm@50keV : 1.04769E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.91 using 59 PHA bins.
# Reduced chi-squared = 0.9091 for 56 degrees of freedom
# Null hypothesis probability = 6.673568e-01
Photon flux (15-150 keV) in 135.3 sec: 8.73825E-02 ( -0.0186705 0.0183235 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.88866e-07 ( -1.96002e-07 1.98662e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.876263 ( 1.09671 1.09671 )
beta : -2.87773 ( 2.86041 0.779065 )
Epeak [keV] : 20.7162 ( -20.9827 12.6001 )
Norm@50keV : 5.90735E-03 ( -0.00713913 424.524 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.27 using 59 PHA bins.
# Reduced chi-squared = 0.9139 for 55 degrees of freedom
# Null hypothesis probability = 6.557829e-01
Photon flux (15-150 keV) in 135.3 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) = 2.44e-07
S(50-100 keV) = 1.76e-07
T90 vs. Hardness ratio plot
T90 = 160 sec.
Hardness ratio (energy fluence ratio) = 0.721311
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.728188
Count Ratio (50-100 keV) / (15-25 keV) = 0.224797
Mask shadow pattern
IMX = -2.384817959365511E-01, IMY = -3.902897601720814E-01
TIME vs. PHA plot around the trigger time
TIME vs. DetID plot around the trigger time
100 us light curve (15-350 keV)
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 -63.000000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9595 -15.6451 1.0 44.2 -56.8 7.6467 11.7 1.2 Sco X-1
255.9126 -37.7211 4.6 27.7 -87.7 0.6553 2.5 8.2 4U 1700-377
256.2820 -36.4144 9.5 27.5 -84.8 0.3109 1.2 7.4 GX 349+2
263.0035 -24.8059 4.5 25.0 -55.8 0.5696 2.6 3.6 GX 1+4
264.5365 -44.3998 3.7 22.2 -105.7 0.6675 3.1 9.3 4U 1735-44
268.3690 -1.4535 7.8 38.0 -16.1 0.3537 1.5 0.1 SW J1753.5-0127
270.2673 -25.0972 1.7 19.1 -47.8 1.2488 6.6 1.4 GX 5-1
270.4033 -25.7463 8.9 18.6 -49.3 0.2464 1.3 5.5 GRS 1758-258
273.9094 -14.1497 5.8 24.4 -19.8 0.3600 2.0 8.8 GX 17+2
275.8080 -30.3263 5.7 12.4 -57.4 0.3790 2.0 6.5 H1820-303
284.9138 -25.0587 6.4 9.7 -7.2 -0.3196 -1.8 10.6 HT1900.1-2455
288.7808 10.9479 1.4 44.7 18.9 3.1683 8.2 1.0 GRS 1915+105
263.0357 -33.7383 3.2 22.2 -77.1 0.7413 3.6 6.2 GX 354-0
279.4192 19.1567 2.5 53.8 8.1 3.3723 4.7 ------ UNKNOWN
7.8115 -70.8961 3.1 54.4 177.2 3.0218 3.7 ------ UNKNOWN
355.1735 -84.0264 2.8 53.9 -166.4 2.3590 4.1 ------ UNKNOWN
230.0509 -86.2935 2.5 54.4 -155.7 3.0100 4.7 ------ UNKNOWN
251.7490 -46.4958 2.7 31.4 -105.0 1.2135 4.3 ------ UNKNOWN
238.7231 -39.1850 5.1 40.9 -92.5 1.8103 2.3 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-63.000000 72.300600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.8287 -15.6798 5.8 44.3 -56.9 -1.2883 -2.0 9.0 Sco X-1
256.1766 -37.9435 4.0 27.5 -88.2 0.6905 2.9 10.8 4U 1700-377
256.6226 -36.5528 0.0 27.2 -85.1 0.3206 1.3 11.9 GX 349+2
263.0676 -24.8791 27.3 24.9 -55.8 -0.0907 -0.4 8.6 GX 1+4
264.5818 -44.3162 7.4 22.2 -105.6 -0.3238 -1.6 10.6 4U 1735-44
268.2555 -1.5130 19.8 38.0 -16.3 0.1424 0.6 7.7 SW J1753.5-0127
270.2080 -25.1456 4.4 19.1 -48.0 -0.4825 -2.6 5.7 GX 5-1
270.1678 -25.8563 5.1 18.8 -50.0 0.4171 2.3 10.0 GRS 1758-258
274.1111 -13.8540 0.0 24.5 -19.1 0.0803 0.4 12.5 GX 17+2
275.9524 -30.3781 143.8 12.2 -57.4 0.0140 0.1 1.6 H1820-303
285.1558 -24.9537 10.7 9.7 -5.7 -0.1820 -1.1 6.8 HT1900.1-2455
288.9587 10.8572 20.0 44.6 19.1 -0.2141 -0.6 10.8 GRS 1915+105
263.0934 -33.6849 4.0 22.2 -77.0 -0.6006 -2.9 10.4 GX 354-0
Post-slew image of 15-350 keV band
Time interval of the image:
117.900620 854.800600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
270.3142 -25.1341 16.8 43.4 -52.6 1.2018 0.7 3.7 GX 5-1
270.1995 -25.6446 4.9 43.3 -53.4 4.1792 2.4 8.1 GRS 1758-258
273.9022 -13.9572 27.6 46.1 -36.5 0.4042 0.4 7.7 GX 17+2
276.0727 -30.2598 6.8 36.8 -57.0 1.2445 1.7 10.0 H1820-303
285.0432 -24.9132 18.3 31.5 -42.8 0.3545 0.6 0.6 HT1900.1-2455
288.8140 10.9610 2.3 54.4 0.0 7.6989 5.0 1.3 GRS 1915+105
316.7387 -17.8869 3.3 17.2 28.8 1.5695 3.5 ------ UNKNOWN
303.0519 -18.9774 4.0 21.7 -8.8 1.2558 2.9 ------ UNKNOWN
46.6961 -66.0949 3.5 57.3 -170.4 7.8857 3.3 ------ UNKNOWN
49.9097 -70.1026 5.4 57.6 -165.4 5.0552 2.1 ------ UNKNOWN
266.9358 -43.9238 2.3 41.1 -80.8 11.2210 4.9 ------ UNKNOWN
266.3183 -27.4138 2.6 45.8 -57.7 10.2653 4.5 ------ UNKNOWN
Plot creation:
Sun Nov 1 14:43:12 EST 2015