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Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
314.3622 +19.2961 0.0393 32.0 -112.1 0.1212 4.9 TRIG_00519207
------------------------------------------
Foreground time interval of the image:
0.000 2.048 (delta_t = 2.048 [sec])
Background time interval of the image:
-120.743 -10.944 (delta_t = 109.799 [sec])
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
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)
Flight mask-tagged light curves
Caution: Mask-weight map is always using the same on-axis map
Quad-rate summed light curves (from T0-300 to T0+1000)
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
Time interval is from 0.000 sec. to 2.048 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.91684 ( -0.499018 0.533794 )
Norm@50keV : 3.43416E-03 ( -0.00127284 0.00125075 )
------------------------------------------------------------
# Chi-Squared = 59.87 using 59 PHA bins.
# Reduced chi-squared = 1.050 for 57 degrees of freedom
# Null hypothesis probability = 3.721041e-01
Photon flux (15-150 keV) in 2.048 sec: 0.496433 ( -0.156833 0.157142 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.4639e-08 ( -2.2759e-08 2.4072e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 2.048 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -7.79432 ( )
Epeak [keV] : 30.2983 ( -4.35833 5.98734 )
Norm@50keV : 1.61342E+04 ( )
------------------------------------------------------------
# Chi-Squared = 51.81 using 59 PHA bins.
# Reduced chi-squared = 0.9253 for 56 degrees of freedom
# Null hypothesis probability = 6.339420e-01
Photon flux (15-150 keV) in 2.048 sec: 0.463741 ( -0.137031 0.143022 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.30842e-08 ( -1.28166e-08 1.44763e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 2.048 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99982 ( -10483.1 -10468.1 )
beta : -4.14741 ( 4.16171 1.97486 )
Epeak [keV] : 30.7016 ( -6.75632 5.70786 )
Norm@50keV : 198.882 ( -197.808 723.997 )
------------------------------------------------------------
# Chi-Squared = 51.67 using 59 PHA bins.
# Reduced chi-squared = 0.9395 for 55 degrees of freedom
# Null hypothesis probability = 6.024958e-01
Photon flux (15-150 keV) in 2.048 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] : 8.27935 (-1.74845 2.47612)
R^2/D10^2 : 0.546363 (-0.546365 0.86451)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 54.40 using 59 PHA bins.
# Reduced chi-squared = 0.9544 for 57 degrees of freedom
# Null hypothesis probability = 5.731084e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.421e-08 8.471e-09
25- 50 2.638e-08 1.474e-08
50-150 7.744e-09 6.191e-09
15-150 4.833e-08 2.891e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 57.1247 (-30.0204 -57.1263)
Norm : 2.75628 (-1.13176 1.86425)
------------------------------------------------------------
# Chi-Squared = 58.36 using 59 PHA bins.
# Reduced chi-squared = 1.024 for 57 degrees of freedom
# Null hypothesis probability = 4.252011e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.407e-08 7.847e-09
25- 50 2.108e-08 1.272e-08
50-150 2.302e-08 1.822e-08
15-150 5.817e-08 3.808e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 199.984 ( )
R1^2/D10^2 : 3.23844E-05 (-3.24065e-05 4.73891e-05)
kT2 [keV] : 7.91251 (-1.67816 2.33353)
R2^2/D10^2 : 0.628056 (-0.411129 1.00529)
------------------------------------------------------------
# Chi-Squared = 54.40 using 59 PHA bins.
# Chi-Squared = 53.16 using 59 PHA bins.
# Reduced chi-squared = 0.9892 for 55 degrees of freedom
# Reduced chi-squared = 0.9666 for 55 degrees of freedom
# Null hypothesis probability = 4.973256e-01
# Null hypothesis probability = 5.451585e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.419e-08 7.806e-03
25- 50 2.639e-08 6.506e-02
50-150 7.791e-09 1.713e+00
15-150 4.837e-08 1.805e+00
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 2.048 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.91684 ( -0.499018 0.533794 )
Norm@50keV : 3.43416E-03 ( -0.00127284 0.00125075 )
------------------------------------------------------------
# Chi-Squared = 59.87 using 59 PHA bins.
# Reduced chi-squared = 1.050 for 57 degrees of freedom
# Null hypothesis probability = 3.721041e-01
Photon flux (15-150 keV) in 2.048 sec: 0.496433 ( -0.156833 0.157142 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.4639e-08 ( -2.2759e-08 2.4072e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 2.048 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -7.79432 ( )
Epeak [keV] : 30.2983 ( -4.35833 5.98734 )
Norm@50keV : 1.61342E+04 ( )
------------------------------------------------------------
# Chi-Squared = 51.81 using 59 PHA bins.
# Reduced chi-squared = 0.9253 for 56 degrees of freedom
# Null hypothesis probability = 6.339420e-01
Photon flux (15-150 keV) in 2.048 sec: 0.463741 ( -0.137031 0.143022 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.30842e-08 ( -1.28166e-08 1.44763e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 2.048 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99982 ( -10483.1 -10468.1 )
beta : -4.14741 ( 4.16171 1.97486 )
Epeak [keV] : 30.7016 ( -6.75632 5.70786 )
Norm@50keV : 198.882 ( -197.808 723.997 )
------------------------------------------------------------
# Chi-Squared = 51.67 using 59 PHA bins.
# Reduced chi-squared = 0.9395 for 55 degrees of freedom
# Null hypothesis probability = 6.024958e-01
Photon flux (15-150 keV) in 2.048 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] : 8.27935 (-1.74845 2.47612)
R^2/D10^2 : 0.546363 (-0.546365 0.86451)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 54.40 using 59 PHA bins.
# Reduced chi-squared = 0.9544 for 57 degrees of freedom
# Null hypothesis probability = 5.731084e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.421e-08 8.333e-09
25- 50 2.638e-08 1.616e-08
50-150 7.744e-09 5.843e-09
15-150 4.833e-08 3.033e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 57.1247 (-30.0204 -57.1263)
Norm : 2.75628 (-1.13176 1.86425)
------------------------------------------------------------
# Chi-Squared = 58.36 using 59 PHA bins.
# Reduced chi-squared = 1.024 for 57 degrees of freedom
# Null hypothesis probability = 4.252011e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.407e-08 8.501e-09
25- 50 2.108e-08 1.309e-08
50-150 2.302e-08 1.825e-08
15-150 5.817e-08 3.588e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 199.984 ( )
R1^2/D10^2 : 3.23844E-05 (-3.24065e-05 4.73891e-05)
kT2 [keV] : 7.91251 (-1.67816 2.33353)
R2^2/D10^2 : 0.628056 (-0.411129 1.00529)
------------------------------------------------------------
# Chi-Squared = 54.40 using 59 PHA bins.
# Chi-Squared = 53.16 using 59 PHA bins.
# Reduced chi-squared = 0.9892 for 55 degrees of freedom
# Reduced chi-squared = 0.9666 for 55 degrees of freedom
# Null hypothesis probability = 4.973256e-01
# Null hypothesis probability = 5.451585e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.419e-08 7.627e-03
25- 50 2.639e-08 6.835e-02
50-150 7.791e-09 1.592e+00
15-150 4.837e-08 1.519e+00
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: 1.91684 ( -0.499018 0.533794 )
Norm@50keV : 3.43416E-03 ( -0.00127284 0.00125075 )
------------------------------------------------------------
# Chi-Squared = 59.87 using 59 PHA bins.
# Reduced chi-squared = 1.050 for 57 degrees of freedom
# Null hypothesis probability = 3.721041e-01
Photon flux (15-150 keV) in 2.048 sec: 0.496433 ( -0.156833 0.157142 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.4639e-08 ( -2.2759e-08 2.4072e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -7.79432 ( )
Epeak [keV] : 30.2983 ( -4.35833 5.98734 )
Norm@50keV : 1.61342E+04 ( )
------------------------------------------------------------
# Chi-Squared = 51.81 using 59 PHA bins.
# Reduced chi-squared = 0.9253 for 56 degrees of freedom
# Null hypothesis probability = 6.339420e-01
Photon flux (15-150 keV) in 2.048 sec: 0.463741 ( -0.137031 0.143022 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.30842e-08 ( -1.28166e-08 1.44763e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99982 ( -10483.1 -10468.1 )
beta : -4.14741 ( 4.16171 1.97486 )
Epeak [keV] : 30.7016 ( -6.75632 5.70786 )
Norm@50keV : 198.882 ( -197.808 723.997 )
------------------------------------------------------------
# Chi-Squared = 51.67 using 59 PHA bins.
# Reduced chi-squared = 0.9395 for 55 degrees of freedom
# Null hypothesis probability = 6.024958e-01
Photon flux (15-150 keV) in 2.048 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) = 1.89713e-08
S(50-100 keV) = 2.00766e-08
T90 vs. Hardness ratio plot
T90 = 2.04799997806549 sec.
Hardness ratio (energy fluence ratio) = 1.05826
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.15304
Count Ratio (50-100 keV) / (15-25 keV) = 0.251686
Mask shadow pattern
IMX = -2.357680772984377E-01, IMY = 5.796907805786634E-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:
-120.743400 -10.944000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.3877 35.2841 11.8 46.6 157.0 0.3049 1.0 4.9 Her X-1
262.8124 -24.6277 0.0 35.0 57.4 0.1416 0.6 12.8 GX 1+4
268.4005 -1.5905 3.7 19.6 98.9 0.4338 3.1 8.5 SW J1753.5-0127
270.1540 -25.0097 7.5 30.8 47.8 0.2810 1.5 8.2 GX 5-1
270.3619 -25.8440 6.3 31.3 46.6 0.3352 1.8 6.9 GRS 1758-258
274.0880 -14.0809 3.5 20.0 57.7 0.4204 3.3 5.5 GX 17+2
275.9446 -30.3634 3.5 32.9 34.4 0.5884 3.3 1.0 H1820-303
285.0075 -24.9065 16.1 25.6 21.2 0.0925 0.7 1.8 HT1900.1-2455
288.7989 10.9149 0.9 10.4 -159.5 1.5047 12.5 1.8 GRS 1915+105
299.5786 35.2167 1.0 36.3 -148.4 1.9965 11.5 1.1 Cyg X-1
308.0378 40.9353 2.3 44.3 -142.8 1.3308 5.0 3.4 Cyg X-3
262.9056 -33.8253 9.3 41.6 47.1 -0.4197 -1.2 4.2 GX 354-0
260.0611 25.2729 2.7 36.5 150.1 0.8953 4.3 ------ UNKNOWN
262.7258 35.1045 2.8 41.7 163.8 0.9112 4.1 ------ UNKNOWN
262.4036 53.4410 2.4 56.9 177.5 3.5120 4.9 ------ UNKNOWN
335.4139 -31.4724 2.4 55.2 -34.8 3.4517 4.8 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
0.000000 2.048000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.3417 35.2722 4.5 46.6 157.0 -0.1068 -2.6 7.1 Her X-1
262.9720 -24.6163 37.6 34.8 57.3 -0.0094 -0.3 8.0 GX 1+4
268.4739 -1.4250 31.2 19.5 99.4 0.0064 0.4 6.6 SW J1753.5-0127
270.4659 -25.1447 4.9 30.7 47.2 -0.0521 -2.3 10.6 GX 5-1
270.2430 -25.7042 6.9 31.3 46.9 -0.0374 -1.7 4.0 GRS 1758-258
273.9672 -14.0515 10.4 20.1 58.0 0.0189 1.1 2.4 GX 17+2
276.0323 -30.2106 132.7 32.8 34.3 0.0020 0.1 10.9 H1820-303
285.1755 -25.0438 4.2 25.7 20.8 -0.0442 -2.7 10.6 HT1900.1-2455
288.7416 11.0856 11.2 10.6 -159.9 0.0151 1.0 9.0 GRS 1915+105
299.5996 35.1765 1.1 36.3 -148.4 0.2113 10.4 1.6 Cyg X-1
307.9922 40.8184 0.0 44.2 -142.8 -0.0673 -2.2 9.7 Cyg X-3
263.0915 -33.8922 7.8 41.6 46.9 -0.0637 -1.5 6.2 GX 354-0
268.9880 -8.2418 2.5 20.8 79.8 0.0842 4.6 ------ UNKNOWN
314.3622 19.2963 2.4 32.0 -112.1 0.1212 4.9 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
89.556600 962.149800
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
288.8060 10.9539 0.6 25.9 69.5 12.3130 19.3 0.7 GRS 1915+105
299.5912 35.1894 0.4 20.6 138.3 16.8350 30.5 0.7 Cyg X-1
308.1322 40.9533 0.8 22.3 162.1 7.2031 14.5 1.0 Cyg X-3
326.0500 38.3120 2.4 21.6 -159.8 2.5182 4.8 5.8 Cyg X-2
289.5588 -13.6681 3.0 41.0 32.8 3.5487 3.9 ------ UNKNOWN
10.1532 48.3516 2.9 53.2 -142.2 12.7722 4.0 ------ UNKNOWN
345.1614 -23.1202 4.0 52.0 -42.3 9.8953 2.9 ------ UNKNOWN
5.5290 37.3639 3.4 47.9 -128.9 8.4580 3.4 ------ UNKNOWN
Plot creation:
Tue Apr 3 08:10:49 EDT 2012