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Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
264.7688 -30.3930 0.0430 2.4 7.4 1.2076 4.5 TRIG_00533120
------------------------------------------
Foreground time interval of the image:
0.000 45.020 (delta_t = 45.020 [sec])
46.000 309.260 (delta_t = 263.260 [sec])
310.000 320.000 (delta_t = 10.000 [sec])
Background time interval of the image:
Lightcurves
Notes:
- 1) All plots contain as much data as has been downloaded to date.
- 2) The mask-weighted light curves are using the flight position.
- 3) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 4) 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.
- 5) 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.
- 6) 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)
The mask-weighted light curves based on cleaned DPHs
Spectra
Notes:
- 1) The fitting includes the systematic errors.
- 2) For long bursts, a spectral fit of 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.
- 4) For short bursts (T90<1sec), the specrtum is also fit with Blackbody, OTTB, and Double Blackbody.
Time averaged spectrum fit using the pre-slew DRM
Power-law model
Multiple GTIs in the spectrum
tstart tstop
0.000000 45.020000
46.000000 309.260000
310.000000 320.000000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.36227 ( -0.534948 0.628629 )
Norm@50keV : 1.44712E-04 ( -6.26449e-05 6.39043e-05 )
------------------------------------------------------------
# Chi-Squared = 40.41 using 59 PHA bins.
# Reduced chi-squared = 0.7090 for 57 degrees of freedom
# Null hypothesis probability = 9.527643e-01
Photon flux (15-150 keV) in 318.3 sec: 2.61960E-02 ( -0.00724473 0.00725166 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.45626e-07 ( -1.50723e-07 1.67586e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
0.000000 45.020000
46.000000 309.260000
310.000000 320.000000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -5.38952 ( )
Epeak [keV] : 24.5112 ( -6.73434 5.36086 )
Norm@50keV : 88.5835 ( )
------------------------------------------------------------
# Chi-Squared = 38.95 using 59 PHA bins.
# Reduced chi-squared = 0.6955 for 56 degrees of freedom
# Null hypothesis probability = 9.596808e-01
Photon flux (15-150 keV) in 318.3 sec: 2.39665E-02 ( -0.0068004 0.007031 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.03003e-07 ( -9.4305e-08 4.18612e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
0.000000 45.020000
46.000000 309.260000
310.000000 320.000000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99760 ( -808.33 -798.33 )
beta : -3.07940 ( 3.0794 0.945031 )
Epeak [keV] : 22.4123 ( -6.86506 6.65692 )
Norm@50keV : 77.1991 ( -77.1992 1083.72 )
------------------------------------------------------------
# Chi-Squared = 37.36 using 59 PHA bins.
# Reduced chi-squared = 0.6793 for 55 degrees of freedom
# Null hypothesis probability = 9.670925e-01
Photon flux (15-150 keV) in 318.3 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] : 6.25061 (-1.42042 1.98008)
R^2/D10^2 : 8.20168E-02 (-0.0820154 0.169828)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 39.01 using 59 PHA bins.
# Reduced chi-squared = 0.6844 for 57 degrees of freedom
# Null hypothesis probability = 9.670995e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.434e-07 8.387e-08
25- 50 1.561e-07 9.748e-08
50-150 1.686e-08 1.461e-08
15-150 3.164e-07 1.884e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 30.0877 (-14.2147 41.9285)
Norm : 0.210676 (-0.0966071 0.202327)
------------------------------------------------------------
# Chi-Squared = 39.71 using 59 PHA bins.
# Reduced chi-squared = 0.6967 for 57 degrees of freedom
# Null hypothesis probability = 9.604451e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.367e-07 5.865e-08
25- 50 1.564e-07 9.312e-08
50-150 8.600e-08 6.929e-08
15-150 3.791e-07 1.948e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.74395 (-5.74395 1.93049)
R1^2/D10^2 : 0.109972 (-0.109997 0.298296)
kT2 [keV] : 38.4460 (-38.4398 -38.4398)
R2^2/D10^2 : 4.36377E-05 (-4.36598e-05 0.000609852)
------------------------------------------------------------
# Chi-Squared = 37.17 using 59 PHA bins.
# Reduced chi-squared = 0.6759 for 55 degrees of freedom
# Null hypothesis probability = 9.687623e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.465e-07 8.589e-08
25- 50 1.485e-07 8.799e-08
50-150 1.770e-07 1.154e-07
15-150 4.720e-07 2.284e-07
Peak spectrum fit
Power-law model
Time interval is from 310.000 sec. to 320.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.36227 ( -0.534948 0.628629 )
Norm@50keV : 1.44712E-04 ( -6.26449e-05 6.39043e-05 )
------------------------------------------------------------
# Chi-Squared = 40.41 using 59 PHA bins.
# Reduced chi-squared = 0.7090 for 57 degrees of freedom
# Null hypothesis probability = 9.527643e-01
Photon flux (15-150 keV) in 318.3 sec: 2.61960E-02 ( -0.00724473 0.00725166 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.45626e-07 ( -1.50723e-07 1.67586e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 310.000 sec. to 320.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -5.38952 ( )
Epeak [keV] : 24.5112 ( -7.068 6.70975 )
Norm@50keV : 88.5835 ( )
------------------------------------------------------------
# Chi-Squared = 38.95 using 59 PHA bins.
# Reduced chi-squared = 0.6955 for 56 degrees of freedom
# Null hypothesis probability = 9.596808e-01
Photon flux (15-150 keV) in 318.3 sec: 2.39665E-02 ( -0.0068004 0.007031 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.03003e-07 ( -9.4305e-08 4.18612e-07 ) ergs/cm2
Band function
Time interval is from 310.000 sec. to 320.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99760 ( -808.33 -798.33 )
beta : -3.07940 ( 3.0794 0.945031 )
Epeak [keV] : 22.4123 ( -6.86506 6.65692 )
Norm@50keV : 77.1991 ( -77.1992 1075.91 )
------------------------------------------------------------
# Chi-Squared = 37.36 using 59 PHA bins.
# Reduced chi-squared = 0.6793 for 55 degrees of freedom
# Null hypothesis probability = 9.670925e-01
Photon flux (15-150 keV) in 318.3 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] : 6.25061 (-1.42042 1.98008)
R^2/D10^2 : 8.20168E-02 (-0.0820154 0.169828)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 39.01 using 59 PHA bins.
# Reduced chi-squared = 0.6844 for 57 degrees of freedom
# Null hypothesis probability = 9.670995e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.434e-07 8.535e-08
25- 50 1.561e-07 9.885e-08
50-150 1.686e-08 1.435e-08
15-150 3.164e-07 1.907e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 30.0877 (-14.2147 41.9285)
Norm : 0.210676 (-0.0966071 0.202327)
------------------------------------------------------------
# Chi-Squared = 39.71 using 59 PHA bins.
# Reduced chi-squared = 0.6967 for 57 degrees of freedom
# Null hypothesis probability = 9.604451e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.367e-07 6.401e-08
25- 50 1.564e-07 8.032e-08
50-150 8.600e-08 7.105e-08
15-150 3.791e-07 1.911e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.74395 (-5.74395 1.93049)
R1^2/D10^2 : 0.109972 (-0.109997 0.298296)
kT2 [keV] : 38.4460 (-38.4398 -38.4398)
R2^2/D10^2 : 4.36377E-05 (-4.36598e-05 0.00061527)
------------------------------------------------------------
# Chi-Squared = 37.17 using 59 PHA bins.
# Reduced chi-squared = 0.6759 for 55 degrees of freedom
# Null hypothesis probability = 9.687623e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.465e-07 8.941e-08
25- 50 1.485e-07 9.048e-08
50-150 1.770e-07 1.219e-07
15-150 4.720e-07 2.513e-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: 2.36227 ( -0.534948 0.628629 )
Norm@50keV : 1.44712E-04 ( -6.26449e-05 6.39043e-05 )
------------------------------------------------------------
# Chi-Squared = 40.41 using 59 PHA bins.
# Reduced chi-squared = 0.7090 for 57 degrees of freedom
# Null hypothesis probability = 9.527643e-01
Photon flux (15-150 keV) in 318.3 sec: 2.61960E-02 ( -0.00724473 0.00725166 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.45626e-07 ( -1.50723e-07 1.67586e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -5.38952 ( )
Epeak [keV] : 24.5112 ( -7.068 6.70975 )
Norm@50keV : 88.5835 ( )
------------------------------------------------------------
# Chi-Squared = 38.95 using 59 PHA bins.
# Reduced chi-squared = 0.6955 for 56 degrees of freedom
# Null hypothesis probability = 9.596808e-01
Photon flux (15-150 keV) in 318.3 sec: 2.39665E-02 ( -0.0068004 0.007031 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.03003e-07 ( -9.4305e-08 4.18612e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99760 ( -808.33 -798.33 )
beta : -3.07940 ( 3.0794 0.945031 )
Epeak [keV] : 22.4123 ( -6.86506 6.65692 )
Norm@50keV : 77.1991 ( -77.1992 1078.47 )
------------------------------------------------------------
# Chi-Squared = 37.36 using 59 PHA bins.
# Reduced chi-squared = 0.6793 for 55 degrees of freedom
# Null hypothesis probability = 9.670925e-01
Photon flux (15-150 keV) in 318.3 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) = 1.45359e-07
S(50-100 keV) = 1.13086e-07
T90 vs. Hardness ratio plot
T90 = 320 sec.
Hardness ratio (energy fluence ratio) = 0.777977
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.647259
Count Ratio (50-100 keV) / (15-25 keV) = 0.242514
Mask shadow pattern
IMX = 4.129490976246045E-02, IMY = -5.371482916305113E-03
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:
-17.599400 45.020000
46.000000 47.656000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9933 -15.6374 0.6 24.8 -44.1 1.9413 19.0 0.8 Sco X-1
255.9482 -37.9074 2.0 8.8 -121.2 0.5176 5.7 4.2 4U 1700-377
256.6289 -36.5618 4.0 7.7 -115.0 0.2618 2.9 12.5 GX 349+2
262.9188 -24.6921 13.3 8.2 -4.8 0.0809 0.9 5.9 GX 1+4
264.7371 -44.3179 6.7 11.5 -173.2 0.1517 1.7 7.9 4U 1735-44
268.2280 -1.4035 7.2 31.5 13.5 0.1794 1.6 8.9 SW J1753.5-0127
270.2792 -24.9984 2.6 9.2 40.1 0.3809 4.4 4.9 GX 5-1
270.2267 -25.7435 4.0 8.5 42.4 0.2495 2.9 4.1 GRS 1758-258
274.1327 -14.0500 4.6 20.6 33.6 0.2493 2.5 7.4 GX 17+2
275.8761 -30.3776 5.0 9.8 85.6 0.2160 2.3 2.6 H1820-303
285.0235 -25.0713 11.1 19.3 78.5 0.1155 1.0 9.1 HT1900.1-2455
288.7914 10.9651 4.6 49.4 38.6 1.0381 2.5 1.2 GRS 1915+105
262.9888 -33.8345 58.3 1.8 -119.5 -0.0175 -0.2 0.0 GX 354-0
309.4994 -35.6928 2.3 36.8 114.1 1.1928 5.0 ------ UNKNOWN
306.7448 -55.0159 2.8 36.7 146.9 0.6990 4.1 ------ UNKNOWN
275.2900 -70.1293 3.2 37.8 -179.0 0.4579 3.6 ------ UNKNOWN
253.0975 16.0290 2.0 50.1 -7.8 1.1687 5.8 ------ UNKNOWN
236.9037 -7.9061 2.6 35.8 -45.4 0.6140 4.5 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
0.000000 45.020000
46.000000 309.260000
310.000000 320.000000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9774 -15.6348 0.3 24.8 -44.1 9.9285 34.8 0.3 Sco X-1
255.9652 -37.8528 1.0 8.8 -121.0 2.7173 11.3 1.1 4U 1700-377
256.2564 -36.5765 0.0 7.9 -114.1 0.4351 1.8 12.6 GX 349+2
262.8593 -24.7625 3.1 8.2 -5.3 0.9567 3.7 8.2 GX 1+4
264.7907 -44.5386 5.3 11.8 -173.4 0.5873 2.2 5.7 4U 1735-44
268.5119 -1.5221 5.1 31.5 14.1 0.6938 2.3 9.6 SW J1753.5-0127
270.2931 -25.0712 2.7 9.1 40.4 1.0427 4.3 0.7 GX 5-1
270.2584 -25.8036 3.3 8.5 42.8 0.8374 3.5 4.3 GRS 1758-258
273.9836 -14.0829 2.5 20.5 33.2 1.3185 4.7 3.1 GX 17+2
275.8514 -30.3921 3.3 9.8 85.6 0.8953 3.5 4.1 H1820-303
284.9439 -24.9514 9.6 19.3 78.1 0.3901 1.2 5.3 HT1900.1-2455
288.8655 10.9373 3.2 49.4 38.7 4.4141 3.6 4.0 GRS 1915+105
262.8324 -33.7745 4.1 1.9 -115.7 0.7710 2.8 8.6 GX 354-0
242.3514 -44.3546 2.7 20.9 -123.3 1.1562 4.3 ------ UNKNOWN
206.1742 -67.0183 2.2 48.0 -146.5 3.3778 5.2 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
364.100600 517.400590
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
245.0019 -15.6354 0.5 23.4 -56.2 4.9691 25.7 1.3 Sco X-1
256.0213 -37.8598 1.2 10.4 -139.0 1.6132 9.5 1.9 4U 1700-377
256.3838 -36.2784 4.2 9.2 -133.0 0.4602 2.7 9.0 GX 349+2
262.9944 -24.7403 3.2 5.9 -17.3 0.5617 3.5 0.9 GX 1+4
264.5353 -44.5975 0.0 14.2 180.0 0.0642 0.4 12.5 4U 1735-44
268.3019 -1.5282 4.6 29.1 6.3 0.4675 2.5 6.0 SW J1753.5-0127
270.1150 -24.9605 19.2 7.2 41.2 0.0929 0.6 11.6 GX 5-1
270.2270 -25.8943 5.5 6.6 47.1 0.3276 2.1 9.9 GRS 1758-258
274.0186 -14.0862 3.9 18.4 28.6 0.4797 3.0 3.1 GX 17+2
275.8892 -30.3471 3.7 9.5 91.6 0.4552 3.1 2.2 H1820-303
285.0727 -24.8400 29.4 18.8 76.8 0.0780 0.4 5.2 HT1900.1-2455
288.7886 10.9590 3.1 47.3 32.0 1.9396 3.7 1.0 GRS 1915+105
262.9097 -33.9825 3.6 3.9 -157.1 0.5004 3.2 9.7 GX 354-0
308.9240 -26.1245 2.5 38.8 94.0 3.1552 4.6 ------ UNKNOWN
217.1803 -75.5230 2.7 50.6 -167.0 1.7180 4.3 ------ UNKNOWN
216.2937 -75.6287 3.0 50.8 -167.0 1.7450 4.4 ------ UNKNOWN
209.2173 -72.7750 3.0 51.1 -162.6 1.5781 3.8 ------ UNKNOWN
210.9353 -69.9123 2.8 49.5 -159.5 1.5700 4.1 ------ UNKNOWN
Plot creation:
Mon Sep 10 15:12:01 EDT 2012