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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
292.6621 4.1140 0.0093 43.5554 -154.6046 4.1803718 20.810 TRIG_00639278
Foreground time interval of the image:
-40.060 29.477 (delta_t = 69.537 [sec])
Background time interval of the image:
-239.024 -40.060 (delta_t = 198.964 [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)
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 -40.060 sec. to 121.744 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.80811 ( -0.0981782 0.0992844 )
Norm@50keV : 2.55804E-03 ( -0.000151299 0.000150608 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.99 using 59 PHA bins.
# Reduced chi-squared = 0.8596 for 57 degrees of freedom
# Null hypothesis probability = 7.657109e-01
Photon flux (15-150 keV) in 161.8 sec: 0.353606 ( -0.0208688 0.0209264 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.80926e-06 ( -2.28403e-07 2.29352e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -40.060 sec. to 121.744 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.964583 ( -0.4917 0.440443 )
Epeak [keV] : 58.2951 ( -7.75108 15.4471 )
Norm@50keV : 7.03198E-03 ( -0.00284182 0.00554515 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.31 using 59 PHA bins.
# Reduced chi-squared = 0.6662 for 56 degrees of freedom
# Null hypothesis probability = 9.743002e-01
Photon flux (15-150 keV) in 161.8 sec: 0.338093 ( -0.022223 0.022271 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.57138e-06 ( -2.56453e-07 2.5854e-07 ) ergs/cm2
Band function
Time interval is from -40.060 sec. to 121.744 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.830666 ( -0.536089 4.06972 )
beta : -2.50281 ( 2.49973 0.587594 )
Epeak [keV] : 54.7951 ( -24.7901 16.7074 )
Norm@50keV : 8.45443E-03 ( -0.00407668 6.99972 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 36.83 using 59 PHA bins.
# Reduced chi-squared = 0.6696 for 55 degrees of freedom
# Null hypothesis probability = 9.716749e-01
Photon flux (15-150 keV) in 161.8 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.59866e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 12.5955 (-0.805177 0.865282)
R^2/D10^2 : 7.02694E-02 (-0.0157042 0.0200667)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 83.39 using 59 PHA bins.
# Reduced chi-squared = 1.463 for 57 degrees of freedom
# Null hypothesis probability = 1.290542e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.825e-07 3.778e-08
25- 50 1.272e-06 8.009e-08
50-150 1.252e-06 1.452e-07
15-150 2.907e-06 1.845e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 104.330 (-20.6783 24.0445)
Norm : 1.52977 (-0.116868 0.151285)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.81 using 59 PHA bins.
# Reduced chi-squared = 0.6809 for 57 degrees of freedom
# Null hypothesis probability = 9.688215e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.469e-07 6.407e-08
25- 50 1.128e-06 7.944e-08
50-150 1.872e-06 5.267e-07
15-150 3.646e-06 5.922e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.07490 (-1.41049 1.55951)
R1^2/D10^2 : 0.373015 (-0.169641 0.402128)
kT2 [keV] : 21.0032 (-3.72568 7.0338)
R2^2/D10^2 : 7.26795E-03 (-0.00506394 0.00967076)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 36.80 using 59 PHA bins.
# Reduced chi-squared = 0.6690 for 55 degrees of freedom
# Null hypothesis probability = 9.719323e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.886e-07 1.314e-07
25- 50 1.190e-06 2.422e-07
50-150 1.774e-06 6.639e-07
15-150 3.553e-06 8.122e-07
Peak spectrum fit
Power-law model
Time interval is from 1.360 sec. to 2.360 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.39340 ( -0.321422 0.31433 )
Norm@50keV : 1.22969E-02 ( -0.00242018 0.00241424 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.76 using 59 PHA bins.
# Reduced chi-squared = 0.9782 for 57 degrees of freedom
# Null hypothesis probability = 5.217965e-01
Photon flux (15-150 keV) in 1 sec: 1.49537 ( -0.316005 0.320225 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.18981e-07 ( -2.40395e-08 2.41559e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.360 sec. to 2.360 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.120346 ( -1.83043 1.30392 )
Epeak [keV] : 81.2436 ( -23.8389 2908.12 )
Norm@50keV : 4.75528E-02 ( -0.0475526 0.281228 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.99 using 59 PHA bins.
# Reduced chi-squared = 0.9463 for 56 degrees of freedom
# Null hypothesis probability = 5.894798e-01
Photon flux (15-150 keV) in 1 sec: 1.41520 ( -0.31951 0.32823 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.13148e-07 ( -2.54561e-08 2.5346e-08 ) ergs/cm2
Band function
Time interval is from 1.360 sec. to 2.360 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.96934 ( -6.14448 -4.96934 )
beta : -1.92404 ( -0.833299 0.517967 )
Epeak [keV] : 41.2789 ( -13.6404 9.52085 )
Norm@50keV : 60.6525 ( -11.5546 435.645 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.65 using 59 PHA bins.
# Reduced chi-squared = 0.9390 for 55 degrees of freedom
# Null hypothesis probability = 6.035148e-01
Photon flux (15-150 keV) in 1 sec: 1.44283 ( ) 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] : 17.2616 (-3.60485 4.85559)
R^2/D10^2 : 0.111201 (-0.0649923 0.144949)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.36 using 59 PHA bins.
# Reduced chi-squared = 0.9711 for 57 degrees of freedom
# Null hypothesis probability = 5.370073e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.719e-09 2.841e-09
25- 50 3.009e-08 1.162e-08
50-150 6.432e-08 2.432e-08
15-150 1.011e-07 3.197e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.357 (-85.6027 -199.362)
Norm : 6.36298 (-1.24283 1.24637)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.44 using 59 PHA bins.
# Reduced chi-squared = 0.9726 for 57 degrees of freedom
# Null hypothesis probability = 5.339047e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.584e-08 9.280e-09
25- 50 3.048e-08 1.719e-08
50-150 6.685e-08 3.841e-08
15-150 1.132e-07 6.485e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.77130 (-3.92563 7.43043)
R1^2/D10^2 : 0.444003 (-0.393374 4.28402)
kT2 [keV] : 27.4294 (-26.7068 -27.5295)
R2^2/D10^2 : 1.55759E-02 (-0.0153327 0.1028)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.19 using 59 PHA bins.
# Reduced chi-squared = 0.9490 for 55 degrees of freedom
# Null hypothesis probability = 5.824938e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.050e-08 6.270e-09
25- 50 3.207e-08 1.771e-08
50-150 7.286e-08 3.879e-08
15-150 1.154e-07 5.820e-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: 1.59092 ( -0.114679 0.114659 )
Norm@50keV : 4.03633E-03 ( -0.000276188 0.000276053 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.82 using 59 PHA bins.
# Reduced chi-squared = 1.085 for 57 degrees of freedom
# Null hypothesis probability = 3.080922e-01
Photon flux (15-150 keV) in 69.54 sec: 0.517240 ( -0.038141 0.0383195 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.62797e-06 ( -1.86789e-07 1.87276e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.494519 ( -0.62361 0.545587 )
Epeak [keV] : 70.6938 ( -10.0361 21.5459 )
Norm@50keV : 1.38033E-02 ( -0.00621095 0.0135203 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.61 using 59 PHA bins.
# Reduced chi-squared = 0.8681 for 56 degrees of freedom
# Null hypothesis probability = 7.478180e-01
Photon flux (15-150 keV) in 69.54 sec: 0.488351 ( -0.040301 0.040536 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.46196e-06 ( -2.04976e-07 2.05463e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.735068 ( -1.71195 4.01173 )
beta : -2.00846 ( 2.00441 0.2625 )
Epeak [keV] : 48.0463 ( -11.8217 39.0574 )
Norm@50keV : 8.04441E-02 ( -0.092379 24.1412 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.75 using 59 PHA bins.
# Reduced chi-squared = 0.8682 for 55 degrees of freedom
# Null hypothesis probability = 7.452882e-01
Photon flux (15-150 keV) in 69.54 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.46939e-06 ( 0 0 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 1.08e-06
S(50-100 keV) = 1.23e-06
T90 vs. Hardness ratio plot
T90 = 130.947999954224 sec.
Hardness ratio (energy fluence ratio) = 1.13889
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.37049
Count Ratio (50-100 keV) / (15-25 keV) = 0.832263
Mask shadow pattern
IMX = -8.589281366023965E-01, IMY = 4.077643457333014E-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:
-239.024000 -40.060000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9869 -15.6329 0.3 23.4 107.5 13.0598 40.1 0.6 Sco X-1
255.9917 -37.7952 2.5 10.4 25.0 1.1162 4.6 2.9 4U 1700-377
256.4968 -36.2818 5.1 9.1 30.3 0.5497 2.3 9.0 GX 349+2
262.9154 -24.6565 6.5 6.0 145.9 0.4309 1.8 7.4 GX 1+4
264.7059 -44.4174 21.5 14.0 -16.8 0.1219 0.5 2.5 4U 1735-44
268.4588 -1.5575 3.2 29.0 170.4 -1.0027 -3.6 8.3 SW J1753.5-0127
270.2784 -25.0855 1.9 7.2 -153.4 1.3110 6.0 0.5 GX 5-1
270.3315 -25.8849 3.7 6.6 -148.5 0.6703 3.2 8.7 GRS 1758-258
273.8826 -14.0083 2.9 18.4 -168.1 0.9594 4.0 7.4 GX 17+2
275.8645 -30.3427 4.5 9.5 -104.5 0.6215 2.6 3.5 H1820-303
284.9300 -24.7593 8.0 18.7 -119.7 0.3635 1.4 11.3 HT1900.1-2455
288.7896 10.9902 1.9 47.3 -164.3 3.1375 6.1 2.7 GRS 1915+105
263.1825 -33.8249 2.8 3.7 4.4 0.9484 4.0 9.7 GX 354-0
196.2693 -53.7559 2.6 53.5 26.0 5.6288 4.5 ------ UNKNOWN
227.0527 -33.9812 2.7 32.0 56.3 1.6543 4.3 ------ UNKNOWN
279.0921 -75.9508 3.5 46.1 -21.9 1.3665 3.3 ------ UNKNOWN
299.7600 16.6969 3.9 57.8 -156.7 5.2576 3.0 ------ UNKNOWN
312.7452 -30.9809 2.8 40.9 -93.6 5.2329 4.1 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-40.060000 29.476600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
245.1040 -15.7337 5.3 23.2 107.5 0.3394 2.2 9.1 Sco X-1
256.0048 -37.8718 8.4 10.5 24.7 -0.1612 -1.4 1.9 4U 1700-377
256.2896 -36.5278 3.5 9.4 29.7 0.4045 3.3 9.4 GX 349+2
262.9578 -24.5733 5.8 6.0 146.5 -0.2198 -2.0 10.7 GX 1+4
264.7998 -44.5547 89.1 14.2 -17.1 0.0154 0.1 6.7 4U 1735-44
268.3164 -1.4973 4.4 29.1 170.1 0.3604 2.6 4.1 SW J1753.5-0127
270.1962 -24.9842 6.2 7.2 -154.4 -0.2006 -1.9 7.4 GX 5-1
270.4993 -25.6348 3.3 6.9 -149.1 0.3801 3.6 12.5 GRS 1758-258
273.8981 -13.8554 0.0 18.5 -168.3 0.1365 1.2 12.5 GX 17+2
275.8938 -30.2102 6.8 9.6 -105.3 -0.1947 -1.7 9.5 H1820-303
284.8608 -25.0066 2.5 18.5 -119.1 -0.5629 -4.6 10.8 HT1900.1-2455
288.8922 10.8039 3.8 47.2 -164.1 0.7138 3.0 10.1 GRS 1915+105
263.0155 -33.6841 24.0 3.7 7.2 0.0527 0.5 9.1 GX 354-0
222.5562 -31.0596 2.6 36.1 60.7 1.2420 4.5 ------ UNKNOWN
233.3586 -16.6165 2.5 31.8 91.3 0.9644 4.6 ------ UNKNOWN
197.8762 -59.0153 2.1 52.6 19.5 3.0511 5.4 ------ UNKNOWN
198.0371 -68.9618 2.3 53.6 7.1 2.1122 4.9 ------ UNKNOWN
292.6621 4.1140 0.6 43.6 -154.6 4.1799 20.8 ------ UNKNOWN
293.2387 -58.6631 2.1 34.3 -43.2 0.8694 5.5 ------ UNKNOWN
303.4782 -25.9569 2.6 34.2 -104.8 0.9131 4.4 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
95.876670 963.066000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.5950 35.3281 5.7 47.0 152.0 4.1941 2.0 6.8 Her X-1
263.0601 -24.8682 5.5 40.8 58.7 4.0182 2.1 7.9 GX 1+4
268.3528 -1.5501 5.4 24.9 92.7 1.8300 2.2 5.9 SW J1753.5-0127
270.2047 -25.1111 3.2 36.5 51.0 4.4192 3.6 4.7 GX 5-1
270.2647 -25.8766 6.1 37.0 50.1 2.3213 1.9 8.3 GRS 1758-258
273.9934 -14.0657 1.9 25.9 60.6 4.9550 6.1 1.9 GX 17+2
275.7733 -30.3838 18.7 38.1 39.3 0.7205 0.6 7.9 H1820-303
284.8863 -24.9389 19.7 30.0 29.6 0.4304 0.6 8.2 HT1900.1-2455
288.7704 10.9288 0.7 7.8 166.3 10.3986 17.1 1.9 GRS 1915+105
299.5892 35.2026 0.3 31.7 -153.7 25.2905 33.2 0.1 Cyg X-1
308.0686 40.9977 2.1 39.4 -146.1 5.9052 5.6 3.3 Cyg X-3
326.3189 38.4300 0.0 46.0 -127.4 2.1734 0.6 9.5 Cyg X-2
277.3568 -23.7932 2.5 31.6 42.8 4.0094 4.7 ------ UNKNOWN
266.9074 20.3081 2.7 29.8 140.4 3.6974 4.3 ------ UNKNOWN
261.6930 49.2225 2.3 52.2 170.3 10.0334 4.9 ------ UNKNOWN
290.1034 -3.3755 2.4 7.9 34.1 2.6800 4.9 ------ UNKNOWN
307.5034 0.4943 2.7 15.3 -61.3 2.5023 4.2 ------ UNKNOWN
315.5469 -12.9513 3.7 28.4 -37.4 1.9524 3.1 ------ UNKNOWN
323.7427 -11.1717 2.9 34.5 -48.0 3.6743 3.9 ------ UNKNOWN
325.4218 43.8638 3.0 49.1 -133.5 11.9296 3.9 ------ UNKNOWN
Plot creation:
Thu May 28 12:54:50 EDT 2015