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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
283.0009 -4.2576 0.0074 35.8019 178.0274 2.1497282 25.900 TRIG_00522197
Foreground time interval of the image:
-8.752 17.789 (delta_t = 26.541 [sec])
Background time interval of the image:
-239.112 -8.752 (delta_t = 230.360 [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)
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 -8.752 sec. to 165.552 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.56899 ( -0.102926 0.103266 )
Norm@50keV : 1.71013E-03 ( -9.62951e-05 9.60499e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.83 using 59 PHA bins.
# Reduced chi-squared = 0.7515 for 57 degrees of freedom
# Null hypothesis probability = 9.180779e-01
Photon flux (15-150 keV) in 174.3 sec: 0.217702 ( -0.0129525 0.0130168 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.79872e-06 ( -1.67518e-07 1.68454e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -8.752 sec. to 165.552 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.42630 ( -0.409506 0.232262 )
Epeak [keV] : 209.758 ( -209.758 -209.758 )
Norm@50keV : 2.00504E-03 ( -0.000378964 0.00111746 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.43 using 59 PHA bins.
# Reduced chi-squared = 0.7576 for 56 degrees of freedom
# Null hypothesis probability = 9.097567e-01
Photon flux (15-150 keV) in 174.3 sec: 0.215738 ( -0.013905 0.013914 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.77134e-06 ( -1.84985e-07 1.83625e-07 ) ergs/cm2
Band function
Time interval is from -8.752 sec. to 165.552 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.42672 ( 1.31442 1.31442 )
beta : -8.40360 ( 6.25161 16.2239 )
Epeak [keV] : 210.274 ( -90.3206 -210.274 )
Norm@50keV : 2.00377E-03 ( -0.00011118 0.000384068 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.43 using 59 PHA bins.
# Reduced chi-squared = 0.7714 for 55 degrees of freedom
# Null hypothesis probability = 8.924333e-01
Photon flux (15-150 keV) in 174.3 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] : 15.4739 ( )
R^2/D10^2 : 2.10466E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 120.02 using 59 PHA bins.
# Reduced chi-squared = 2.1056 for 57 degrees of freedom
# Null hypothesis probability = 2.172889e-06
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.829e-07 1.955e-08
25- 50 7.474e-07 5.830e-08
50-150 1.234e-06 1.326e-07
15-150 2.165e-06 1.534e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.278 (-47.4919 -199.287)
Norm : 0.880335 (-0.0488638 0.0528682)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.00 using 59 PHA bins.
# Reduced chi-squared = 0.7544 for 57 degrees of freedom
# Null hypothesis probability = 9.151549e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.821e-07 2.527e-08
25- 50 7.350e-07 5.700e-08
50-150 1.612e-06 3.071e-07
15-150 2.729e-06 3.591e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.77020 (-1.39461 1.57737)
R1^2/D10^2 : 0.256904 (-0.130086 0.346707)
kT2 [keV] : 25.9885 (-4.30184 7.18814)
R2^2/D10^2 : 2.75102E-03 (-0.00159355 0.00265994)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.73 using 59 PHA bins.
# Reduced chi-squared = 0.8314 for 55 degrees of freedom
# Null hypothesis probability = 8.092149e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.732e-07 8.950e-08
25- 50 7.266e-07 1.288e-07
50-150 1.645e-06 3.175e-07
15-150 2.745e-06 5.124e-07
Peak spectrum fit
Power-law model
Time interval is from 0.220 sec. to 1.220 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.17889 ( -0.194741 0.188327 )
Norm@50keV : 1.66312E-02 ( -0.00185211 0.00184041 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.59 using 59 PHA bins.
# Reduced chi-squared = 1.186 for 57 degrees of freedom
# Null hypothesis probability = 1.592105e-01
Photon flux (15-150 keV) in 1 sec: 1.94656 ( -0.231376 0.233057 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.69753e-07 ( -1.89458e-08 1.89855e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.220 sec. to 1.220 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.932817 ( -0.834577 0.411365 )
Epeak [keV] : 254.531 ( -254.531 -254.531 )
Norm@50keV : 2.13101E-02 ( -0.00791177 0.0259825 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.26 using 59 PHA bins.
# Reduced chi-squared = 1.201 for 56 degrees of freedom
# Null hypothesis probability = 1.441080e-01
Photon flux (15-150 keV) in 1 sec: 1.92384 ( -0.24057 0.24175 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.6838e-07 ( -1.9664e-08 1.9508e-08 ) ergs/cm2
Band function
Time interval is from 0.220 sec. to 1.220 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.734337 ( 0.180128 0.180128 )
beta : -1.26389 ( 1.24 0.229443 )
Epeak [keV] : 45.9479 ( -45.9012 180.276 )
Norm@50keV : 0.282137 ( -0.313729 113.528 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.67 using 59 PHA bins.
# Reduced chi-squared = 1.212 for 55 degrees of freedom
# Null hypothesis probability = 1.345755e-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] : 21.3992 (-2.82637 3.47393)
R^2/D10^2 : 7.20241E-02 (-0.028364 0.0439741)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 82.20 using 59 PHA bins.
# Reduced chi-squared = 1.442 for 57 degrees of freedom
# Null hypothesis probability = 1.611002e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.180e-09 1.473e-09
25- 50 3.214e-08 5.895e-09
50-150 1.098e-07 1.997e-08
15-150 1.482e-07 2.125e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 8.40430 (-0.930649 0.930424)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 79.33 using 59 PHA bins.
# Reduced chi-squared = 1.392 for 57 degrees of freedom
# Null hypothesis probability = 2.690696e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.094e-08 1.168e-08
25- 50 4.027e-08 2.215e-08
50-150 8.833e-08 4.798e-08
15-150 1.495e-07 8.180e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.68904 (-2.5806 4.74595)
R1^2/D10^2 : 1.15647 (-0.877424 3.77245)
kT2 [keV] : 31.3915 (-7.48704 31.2678)
R2^2/D10^2 : 1.77153E-02 (-0.0154694 0.0277606)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.92 using 59 PHA bins.
# Reduced chi-squared = 1.217 for 55 degrees of freedom
# Null hypothesis probability = 1.300372e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.464e-08 8.077e-09
25- 50 3.624e-08 1.685e-08
50-150 1.184e-07 5.845e-08
15-150 1.693e-07 7.284e-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: 1.23858 ( -0.101643 0.100144 )
Norm@50keV : 5.80596E-03 ( -0.000332102 0.000331237 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.48 using 59 PHA bins.
# Reduced chi-squared = 0.7803 for 57 degrees of freedom
# Null hypothesis probability = 8.864377e-01
Photon flux (15-150 keV) in 26.54 sec: 0.685433 ( -0.0427151 0.042951 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.54681e-06 ( -8.91245e-08 8.92423e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.802338 ( -0.440648 0.398858 )
Epeak [keV] : 162.508 ( -52.9219 785.956 )
Norm@50keV : 8.92056E-03 ( -0.00283869 0.00458135 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.96 using 59 PHA bins.
# Reduced chi-squared = 0.7315 for 56 degrees of freedom
# Null hypothesis probability = 9.342212e-01
Photon flux (15-150 keV) in 26.54 sec: 0.667065 ( -0.045611 0.045853 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.519e-06 ( -9.39569e-08 9.35296e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.802562 ( -0.326052 0.439427 )
beta : -10.0000 ( 10 1.77636e-15 )
Epeak [keV] : 162.539 ( -50.32 784.871 )
Norm@50keV : 8.91816E-03 ( -0.00283356 0.00458545 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.96 using 59 PHA bins.
# Reduced chi-squared = 0.7448 for 55 degrees of freedom
# Null hypothesis probability = 9.203983e-01
Photon flux (15-150 keV) in 26.54 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) = 7.15e-07
S(50-100 keV) = 9.64e-07
T90 vs. Hardness ratio plot
T90 = 164.343999922276 sec.
Hardness ratio (energy fluence ratio) = 1.34825
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.26026
Count Ratio (50-100 keV) / (15-25 keV) = 0.965091
Mask shadow pattern
IMX = -7.208451500834410E-01, IMY = -2.482760794484370E-02
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:
-239.112000 -8.752000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
186.6599 -62.7748 0.9 53.4 1.7 11.0447 12.3 0.3 GX 301-2
244.9752 -15.6435 0.3 27.8 100.5 18.7592 43.6 0.3 Sco X-1
255.9871 -37.8480 1.1 7.9 43.9 2.7467 10.8 0.2 4U 1700-377
256.4585 -36.4681 4.1 7.5 54.1 0.6896 2.8 2.9 GX 349+2
262.8383 -24.7094 8.3 11.9 134.7 0.3451 1.4 9.6 GX 1+4
264.4923 -44.4514 6.1 8.2 -25.9 0.4406 1.9 10.7 4U 1735-44
268.3704 -1.4587 22.5 35.0 152.2 0.2290 0.5 0.4 SW J1753.5-0127
270.2600 -24.9910 2.9 12.0 167.7 0.9451 3.9 5.5 GX 5-1
270.2286 -25.7325 4.4 11.3 168.7 0.6397 2.6 4.0 GRS 1758-258
273.9861 -14.1953 8.4 23.4 168.2 0.3510 1.4 9.6 GX 17+2
275.9359 -30.2456 4.8 10.5 -155.1 0.6117 2.4 7.3 H1820-303
285.0482 -24.9167 3.5 20.1 -151.6 0.8230 3.3 0.7 HT1900.1-2455
288.7744 10.9877 4.2 52.1 176.8 2.1608 2.7 2.9 GRS 1915+105
262.9128 -33.8688 5.2 3.4 103.7 -0.4880 -2.2 4.3 GX 354-0
248.4980 -47.3751 0.8 16.9 11.5 3.7855 14.9 ------ UNKNOWN
303.8122 -14.8485 3.6 40.1 -144.7 1.1972 3.2 ------ UNKNOWN
313.3851 -14.2450 4.2 47.8 -137.1 2.1924 2.8 ------ UNKNOWN
315.0062 -50.7487 4.2 37.7 -84.0 2.1232 2.8 ------ UNKNOWN
323.1573 -64.3985 4.3 43.8 -64.1 3.5256 2.7 ------ UNKNOWN
317.0733 -19.0599 3.2 48.0 -129.1 4.2553 3.6 ------ UNKNOWN
317.9627 -29.1741 4.5 43.9 -116.1 3.3808 2.6 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-8.752000 17.788600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
186.6304 -62.8068 3.8 53.4 1.7 -0.6305 -3.1 2.3 GX 301-2
244.9806 -15.6738 4.6 27.7 100.5 0.2644 2.5 2.0 Sco X-1
256.1851 -37.8858 9.9 7.8 43.5 0.0699 1.2 9.7 4U 1700-377
256.2104 -36.4129 6.4 7.7 54.4 0.1122 1.8 10.9 GX 349+2
263.1990 -24.7558 8.0 11.8 136.2 0.0880 1.4 10.4 GX 1+4
264.5432 -44.3961 12.3 8.1 -26.1 -0.0565 -0.9 9.1 4U 1735-44
268.3182 -1.5895 3.4 34.8 152.2 -0.3473 -3.4 8.7 SW J1753.5-0127
270.2096 -24.9037 13.8 12.1 167.3 -0.0523 -0.8 11.3 GX 5-1
270.2444 -25.5405 0.0 11.5 168.4 0.0567 0.9 12.6 GRS 1758-258
273.9349 -13.9677 19.9 23.6 167.9 -0.0384 -0.6 5.8 GX 17+2
276.0344 -30.5102 7.9 10.4 -153.7 0.0867 1.4 10.3 H1820-303
285.0315 -24.9223 13.0 20.1 -151.6 -0.0512 -0.9 0.3 HT1900.1-2455
288.6746 10.9168 6.2 52.0 176.7 -0.3736 -1.9 7.5 GRS 1915+105
262.9135 -33.9729 7.4 3.3 102.5 -0.0954 -1.6 9.1 GX 354-0
263.4266 13.8357 2.2 50.2 144.7 1.7190 5.2 ------ UNKNOWN
283.0009 -4.2576 0.4 35.8 178.0 2.1499 25.9 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
88.988600 962.946300
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9902 -15.6422 0.6 39.1 90.9 62.2163 20.0 0.6 Sco X-1
254.6130 35.3101 4.6 47.7 168.9 -4.0187 -2.5 7.9 Her X-1
255.9469 -37.7882 5.2 41.6 53.3 4.8908 2.2 3.8 4U 1700-377
256.5101 -36.3936 3.8 40.3 54.3 6.4059 3.0 4.0 GX 349+2
263.0065 -24.8193 4.1 28.1 61.7 2.6042 2.8 4.4 GX 1+4
264.8835 -44.3575 5.4 43.1 39.6 4.0519 2.1 8.2 4U 1735-44
268.4231 -1.4525 3.1 14.8 121.1 2.2514 3.8 3.3 SW J1753.5-0127
270.2144 -25.1285 4.1 24.2 49.8 2.0967 2.8 4.8 GX 5-1
270.3377 -25.6821 3.2 24.6 48.9 2.8811 3.9 4.1 GRS 1758-258
274.0456 -14.1461 3.5 13.3 61.8 1.9032 3.3 7.0 GX 17+2
276.0309 -30.3741 3.8 26.9 34.0 2.1585 3.0 5.5 H1820-303
284.9224 -25.0415 8.5 20.9 15.7 0.8217 1.4 9.5 HT1900.1-2455
288.8135 10.9318 0.6 16.3 -138.7 11.7450 19.6 1.2 GRS 1915+105
299.5758 35.2054 0.8 42.4 -139.2 18.2812 14.6 0.7 Cyg X-1
263.1061 -33.6903 2171.5 34.8 50.4 -0.0059 -0.0 10.4 GX 354-0
286.7575 53.5928 3.9 57.9 -156.8 12.7890 3.0 ------ UNKNOWN
300.7652 48.7532 5.8 55.2 -145.3 10.3581 2.0 ------ UNKNOWN
310.8451 36.0527 3.8 48.0 -128.9 8.9128 3.0 ------ UNKNOWN
Plot creation:
Sat May 30 19:33:17 EDT 2015