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Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
170.0895 -61.9346 0.0346 31.7 8.4 0.0686 5.6 TRIG_00340919
------------------------------------------
Foreground time interval of the image:
194.648 195.684 (delta_t = 1.036 [sec])
Background time interval of the image:
-239.000 194.648 (delta_t = 433.648 [sec])
Lightcurves
Notes:
- 1) All plots contain as much data as has been downloaded to date.
- 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 64.000000
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 64.000000
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 64.000000
SN=5 or 10 sec. binning (whichever binning is satisfied first)
SN=5 or 10 sec. binning (T < 200 sec)
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 194.648 sec. to 195.684 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.01719 ( -0.674024 0.79639 )
Norm@50keV : 3.07158E-03 ( -0.00142129 0.00127343 )
------------------------------------------------------------
# Chi-Squared = 51.29 using 59 PHA bins.
# Reduced chi-squared = 0.8998 for 57 degrees of freedom
# Null hypothesis probability = 6.882284e-01
Photon flux (15-150 keV) in 1.036 sec: 0.464468 ( -0.149992 0.150045 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.9376e-08 ( -1.1507e-08 1.23363e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 194.648 sec. to 195.684 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.08103 ( )
Epeak [keV] : 36.0865 ( )
Norm@50keV : 2.59936E-03 ( )
------------------------------------------------------------
# Chi-Squared = 51.10 using 59 PHA bins.
# Reduced chi-squared = 0.9124 for 56 degrees of freedom
# Null hypothesis probability = 6.606164e-01
Photon flux (15-150 keV) in 1.036 sec: 0.464265 ( -0.149942 0.149996 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.93638e-08 ( -1.15049e-08 1.23387e-08 ) ergs/cm2
Band function
Time interval is from 194.648 sec. to 195.684 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.32537 ( 1.32536 1.32536 )
beta : -2.06220 ( 2.06289 0.714208 )
Epeak [keV] : 24.0197 ( -23.99 -23.99 )
Norm@50keV : 1.02740E-02 ( -0.0102979 2037.13 )
------------------------------------------------------------
# Chi-Squared = 51.25 using 59 PHA bins.
# Reduced chi-squared = 0.9318 for 55 degrees of freedom
# Null hypothesis probability = 6.187503e-01
Photon flux (15-150 keV) in 1.036 sec: 0.463016 ( -0.149154 0.149166 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.89482e-08 ( -1.07309e-08 1.11506e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 6.77125 (-2.04236 3.60994)
R^2/D10^2 : 0.962292 (-0.962274 3.50702)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 54.35 using 59 PHA bins.
# Reduced chi-squared = 0.9535 for 57 degrees of freedom
# Null hypothesis probability = 5.750934e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.085e-09 4.424e-09
25- 50 9.090e-09 5.491e-09
50-150 1.334e-09 1.189e-09
15-150 1.751e-08 1.118e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 66.2422 (-47.8652 -66.781)
Norm : 2.27828 (-1.01557 2.57921)
------------------------------------------------------------
# Chi-Squared = 52.47 using 59 PHA bins.
# Reduced chi-squared = 0.9205 for 57 degrees of freedom
# Null hypothesis probability = 6.455974e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.017e-09 3.924e-09
25- 50 9.428e-09 5.983e-09
50-150 1.161e-08 9.350e-09
15-150 2.706e-08 1.788e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.86820 (-1.84994 2.64727)
R1^2/D10^2 : 1.59476 (-1.27172 6.72682)
kT2 [keV] : 68.2533 (-48.9248 -69.1214)
R2^2/D10^2 : 3.80352E-04 (-0.000345974 0.00928431)
------------------------------------------------------------
# Chi-Squared = 48.17 using 59 PHA bins.
# Reduced chi-squared = 0.8758 for 55 degrees of freedom
# Null hypothesis probability = 7.311328e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.473e-09 4.531e-09
25- 50 8.144e-09 5.060e-09
50-150 1.947e-08 1.124e-08
15-150 3.509e-08 1.934e-08
Peak spectrum fit
Power-law model
Time interval is from 194.642 sec. to 195.642 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.13541 ( -0.703129 0.862656 )
Norm@50keV : 2.81332E-03 ( -0.00144333 0.00132837 )
------------------------------------------------------------
# Chi-Squared = 52.48 using 59 PHA bins.
# Reduced chi-squared = 0.9208 for 57 degrees of freedom
# Null hypothesis probability = 6.450027e-01
Photon flux (15-150 keV) in 1 sec: 0.450509 ( -0.151558 0.151559 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.62357e-08 ( -1.09048e-08 1.19291e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 194.642 sec. to 195.642 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.86447 ( )
Epeak [keV] : 25.5396 ( )
Norm@50keV : 3.85360E-03 ( )
------------------------------------------------------------
# Chi-Squared = 52.80 using 59 PHA bins.
# Reduced chi-squared = 0.9428 for 56 degrees of freedom
# Null hypothesis probability = 5.968050e-01
Photon flux (15-150 keV) in 1 sec: 0.450314 ( -0.151509 0.15151 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.62241e-08 ( -1.09015e-08 1.19301e-08 ) ergs/cm2
Band function
Time interval is from 194.642 sec. to 195.642 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.302396 ( 1.51487 1.51487 )
beta : -2.30629 ( 2.21649 0.772811 )
Epeak [keV] : 22.2638 ( -18.0204 -18.0204 )
Norm@50keV : 0.220445 ( -0.220643 948.051 )
------------------------------------------------------------
# Chi-Squared = 52.23 using 59 PHA bins.
# Reduced chi-squared = 0.9497 for 55 degrees of freedom
# Null hypothesis probability = 5.810653e-01
Photon flux (15-150 keV) in 1 sec: 0.461625 ( -0.149394 0.166299 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.72031e-08 ( -1.14625e-08 1.25678e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 6.31605 (-1.88833 3.24354)
R^2/D10^2 : 1.26618 (-1.26616 4.7052)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 54.39 using 59 PHA bins.
# Reduced chi-squared = 0.9542 for 57 degrees of freedom
# Null hypothesis probability = 5.736512e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.199e-09 4.510e-09
25- 50 8.012e-09 4.974e-09
50-150 9.014e-10 8.600e-10
15-150 1.611e-08 9.650e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 45.8444 (-31.0047 -45.9162)
Norm : 2.62874 (-1.35968 4.68249)
------------------------------------------------------------
# Chi-Squared = 53.50 using 59 PHA bins.
# Reduced chi-squared = 0.9386 for 57 degrees of freedom
# Null hypothesis probability = 6.071953e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.290e-09 4.098e-09
25- 50 8.749e-09 5.540e-09
50-150 7.807e-09 6.265e-09
15-150 2.285e-08 1.442e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.69963 (-1.70389 2.62154)
R1^2/D10^2 : 1.83535 (-1.50674 6.74098)
kT2 [keV] : 97.8195 (-49.6181 -67.5629)
R2^2/D10^2 : 1.77751E-04 ( )
------------------------------------------------------------
# Chi-Squared = 49.42 using 59 PHA bins.
# Chi-Squared = 49.39 using 59 PHA bins.
# Reduced chi-squared = 0.8985 for 55 degrees of freedom
# Reduced chi-squared = 0.8981 for 55 degrees of freedom
# Null hypothesis probability = 6.868685e-01
# Null hypothesis probability = 6.878344e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.430e-09 4.361e-09
25- 50 7.374e-09 4.271e-09
50-150 1.708e-08 9.675e-09
15-150 3.188e-08 1.770e-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: 2.01719 ( -0.674024 0.79639 )
Norm@50keV : 3.07158E-03 ( -0.00142129 0.00127343 )
------------------------------------------------------------
# Chi-Squared = 51.29 using 59 PHA bins.
# Reduced chi-squared = 0.8998 for 57 degrees of freedom
# Null hypothesis probability = 6.882284e-01
Photon flux (15-150 keV) in 1.036 sec: 0.464468 ( -0.149992 0.150045 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.9376e-08 ( -1.1507e-08 1.23363e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.08648 ( )
Epeak [keV] : 38.6883 ( )
Norm@50keV : 2.59002E-03 ( )
------------------------------------------------------------
# Chi-Squared = 51.09 using 59 PHA bins.
# Reduced chi-squared = 0.9124 for 56 degrees of freedom
# Null hypothesis probability = 6.607687e-01
Photon flux (15-150 keV) in 1.036 sec: 0.464265 ( -0.149942 0.149996 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.93638e-08 ( -1.15049e-08 1.23387e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.32537 ( 1.32536 1.32536 )
beta : -2.06220 ( 2.06289 0.714208 )
Epeak [keV] : 24.0197 ( -23.99 -23.99 )
Norm@50keV : 1.02740E-02 ( -0.0102979 2037.13 )
------------------------------------------------------------
# Chi-Squared = 51.25 using 59 PHA bins.
# Reduced chi-squared = 0.9318 for 55 degrees of freedom
# Null hypothesis probability = 6.187503e-01
Photon flux (15-150 keV) in 1.036 sec: 0.463016 ( -0.149154 0.149166 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.89482e-08 ( -1.07309e-08 1.11506e-08 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 8.88758e-09
S(50-100 keV) = 8.78189e-09
T90 vs. Hardness ratio plot
T90 = 0.919999986886978 sec.
Hardness ratio (energy fluence ratio) = 0.988108
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.574562
Count Ratio (50-100 keV) / (15-25 keV) = 0.46672
Mask shadow pattern
IMX = 6.109938645193879E-01, IMY = -8.996194494712741E-02
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
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 194.648000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.3830 -60.6169 2.2 31.1 10.7 1.7889 5.3 2.0 Cen X-3
186.6867 -62.7772 0.9 25.7 -1.8 3.8992 12.8 0.9 GX 301-2
244.9827 -15.6526 0.5 39.1 -148.4 11.6673 24.0 0.8 Sco X-1
255.9618 -37.8965 3.0 34.5 -108.0 2.0418 3.9 3.4 4U 1700-377
256.4224 -36.4729 21.1 35.4 -110.1 0.2997 0.6 3.1 GX 349+2
264.9164 -44.3104 0.0 39.0 -94.3 0.4199 0.3 11.2 4U 1735-44
171.5135 -20.7268 3.5 39.0 82.4 4.2721 3.3 ------ UNKNOWN
161.3707 -49.0242 3.3 35.0 32.9 1.5304 3.5 ------ UNKNOWN
201.3876 -43.0095 1.7 7.2 46.4 1.8417 6.7 ------ UNKNOWN
170.2193 -61.9688 1.5 31.7 8.3 2.7778 7.7 ------ UNKNOWN
239.5302 -28.3967 2.7 26.7 -137.4 1.2376 4.2 ------ UNKNOWN
249.9408 -6.1672 2.6 49.5 -151.8 3.1240 4.4 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
194.648000 195.684000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.5444 -60.5173 3.3 31.0 10.8 0.0412 3.5 9.3 Cen X-3
186.8909 -62.8553 8.7 25.7 -2.1 0.0129 1.3 8.2 GX 301-2
245.0107 -15.6560 5.6 39.1 -148.3 0.0293 2.0 2.0 Sco X-1
255.9147 -37.7885 12.6 34.5 -108.2 -0.0153 -0.9 4.8 4U 1700-377
256.4193 -36.5448 6.0 35.4 -110.0 0.0341 1.9 7.3 GX 349+2
264.7809 -44.5351 6.0 38.9 -94.0 -0.0628 -2.0 5.4 4U 1735-44
208.9378 -14.1119 2.2 27.3 148.6 0.0605 5.1 ------ UNKNOWN
170.0925 -61.9345 2.0 31.7 8.4 0.0702 5.7 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
437.400590 478.590000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
299.6003 35.1995 963.2 58.6 -20.6 0.0263 0.0 0.5 Cyg X-1
308.1058 41.0631 4.3 55.8 -10.5 3.1227 2.7 6.6 Cyg X-3
326.2769 38.3915 16.8 44.1 0.0 -0.4051 -0.7 6.5 Cyg X-2
358.0528 37.0200 2.7 37.8 37.5 2.8963 4.3 ------ UNKNOWN
327.1094 33.5189 3.4 39.8 -3.5 1.7287 3.4 ------ UNKNOWN
317.5415 13.8665 2.9 35.0 -38.4 1.9524 4.0 ------ UNKNOWN
Plot creation:
Wed Feb 17 00:07:41 EST 2010