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Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
190.5957 -35.5339 0.0444 14.6 -84.5 1.1756 4.3 TRIG_00572489
------------------------------------------
Foreground time interval of the image:
0.000 376.000 (delta_t = 376.000 [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)
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 376.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.96163 ( -0.306626 0.336472 )
Norm@50keV : 2.50319E-04 ( -5.81733e-05 5.66001e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.53 using 59 PHA bins.
# Reduced chi-squared = 0.9918 for 57 degrees of freedom
# Null hypothesis probability = 4.925973e-01
Photon flux (15-150 keV) in 376 sec: 3.69007E-02 ( -0.00660541 0.00660548 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.66582e-07 ( -1.879e-07 1.96269e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 376.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.757773 ( -1.67012 1.20377 )
Epeak [keV] : 42.6898 ( -29.6319 69.872 )
Norm@50keV : 1.25728E-03 ( -0.00125728 0.0113204 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.58 using 59 PHA bins.
# Reduced chi-squared = 0.9568 for 56 degrees of freedom
# Null hypothesis probability = 5.670543e-01
Photon flux (15-150 keV) in 376 sec: 3.57973E-02 ( -0.0065912 0.0066325 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.86133e-07 ( -1.82608e-07 2.0498e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 376.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.758475 ( -0.858841 1.53924 )
beta : -10.0000 ( 10 0 )
Epeak [keV] : 42.6885 ( -16.7214 70.3029 )
Norm@50keV : 1.25593E-03 ( -0.00125593 0.0114049 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.58 using 59 PHA bins.
# Reduced chi-squared = 0.9742 for 55 degrees of freedom
# Null hypothesis probability = 5.290630e-01
Photon flux (15-150 keV) in 376 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] : 10.1029 (-2.04229 2.55894)
R^2/D10^2 : 1.70769E-02 (-0.00976122 0.0229178)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.23 using 59 PHA bins.
# Reduced chi-squared = 1.022 for 57 degrees of freedom
# Null hypothesis probability = 4.298022e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.339e-07 4.465e-08
25- 50 3.378e-07 1.065e-07
50-150 1.816e-07 7.637e-08
15-150 6.534e-07 2.022e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 66.8014 (-26.4763 60.6529)
Norm : 0.187667 (-0.0453896 0.0604699)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.09 using 59 PHA bins.
# Reduced chi-squared = 0.9489 for 57 degrees of freedom
# Null hypothesis probability = 5.850661e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.801e-07 4.976e-08
25- 50 2.828e-07 7.877e-08
50-150 3.507e-07 2.185e-07
15-150 8.136e-07 2.899e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.52843 (-2.50106 3.21259)
R1^2/D10^2 : 0.101168 (-0.0811201 0.218881)
kT2 [keV] : 16.4998 (-13.3544 12.5513)
R2^2/D10^2 : 1.89527E-03 (-0.00181531 0.00918712)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.67 using 59 PHA bins.
# Reduced chi-squared = 0.9576 for 55 degrees of freedom
# Null hypothesis probability = 5.641430e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.758e-07 1.036e-07
25- 50 2.849e-07 1.445e-07
50-150 3.382e-07 1.874e-07
15-150 7.990e-07 4.108e-07
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 376.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.96163 ( -0.306626 0.336472 )
Norm@50keV : 2.50319E-04 ( -5.81733e-05 5.66001e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.53 using 59 PHA bins.
# Reduced chi-squared = 0.9918 for 57 degrees of freedom
# Null hypothesis probability = 4.925973e-01
Photon flux (15-150 keV) in 376 sec: 3.69007E-02 ( -0.00660541 0.00660548 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.66582e-07 ( -1.879e-07 1.96269e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 376.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.757773 ( -1.67012 1.20377 )
Epeak [keV] : 42.6898 ( -29.6319 69.872 )
Norm@50keV : 1.25728E-03 ( -0.00125728 0.0113204 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.58 using 59 PHA bins.
# Reduced chi-squared = 0.9568 for 56 degrees of freedom
# Null hypothesis probability = 5.670543e-01
Photon flux (15-150 keV) in 376 sec: 3.57973E-02 ( -0.0065912 0.0066325 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.86133e-07 ( -1.82608e-07 2.0498e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 376.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.758475 ( -0.858841 1.53924 )
beta : -10.0000 ( 10 1.77636e-15 )
Epeak [keV] : 42.6885 ( -16.7217 70.3031 )
Norm@50keV : 1.25593E-03 ( -0.00125593 0.0114049 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.58 using 59 PHA bins.
# Reduced chi-squared = 0.9742 for 55 degrees of freedom
# Null hypothesis probability = 5.290630e-01
Photon flux (15-150 keV) in 376 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] : 10.1029 (-2.04229 2.55894)
R^2/D10^2 : 1.70769E-02 (-0.00976122 0.0229178)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.23 using 59 PHA bins.
# Reduced chi-squared = 1.022 for 57 degrees of freedom
# Null hypothesis probability = 4.298022e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.339e-07 4.845e-08
25- 50 3.378e-07 1.004e-07
50-150 1.816e-07 8.118e-08
15-150 6.534e-07 1.901e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 66.8014 (-26.4763 60.6529)
Norm : 0.187667 (-0.0453896 0.0604699)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.09 using 59 PHA bins.
# Reduced chi-squared = 0.9489 for 57 degrees of freedom
# Null hypothesis probability = 5.850661e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.801e-07 4.582e-08
25- 50 2.828e-07 7.800e-08
50-150 3.507e-07 2.198e-07
15-150 8.136e-07 3.148e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.52843 (-2.50106 3.21259)
R1^2/D10^2 : 0.101168 (-0.0811201 0.236581)
kT2 [keV] : 16.4998 (-13.3544 12.5513)
R2^2/D10^2 : 1.89527E-03 (-0.00181531 0.00918712)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.67 using 59 PHA bins.
# Reduced chi-squared = 0.9576 for 55 degrees of freedom
# Null hypothesis probability = 5.641430e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.758e-07 9.949e-08
25- 50 2.849e-07 1.493e-07
50-150 3.382e-07 1.983e-07
15-150 7.990e-07 4.241e-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: 1.96163 ( -0.306626 0.336472 )
Norm@50keV : 2.50319E-04 ( -5.81733e-05 5.66001e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.53 using 59 PHA bins.
# Reduced chi-squared = 0.9918 for 57 degrees of freedom
# Null hypothesis probability = 4.925973e-01
Photon flux (15-150 keV) in 376 sec: 3.69007E-02 ( -0.00660541 0.00660548 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.66582e-07 ( -1.879e-07 1.96269e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.757773 ( -1.67012 1.20377 )
Epeak [keV] : 42.6898 ( -29.6319 69.872 )
Norm@50keV : 1.25728E-03 ( -0.00125728 0.0113204 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.58 using 59 PHA bins.
# Reduced chi-squared = 0.9568 for 56 degrees of freedom
# Null hypothesis probability = 5.670543e-01
Photon flux (15-150 keV) in 376 sec: 3.57973E-02 ( -0.0065912 0.0066325 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.86133e-07 ( -1.82608e-07 2.0498e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.758475 ( -0.858841 1.53924 )
beta : -10.0000 ( 10 1.06581e-14 )
Epeak [keV] : 42.6885 ( -16.721 70.3027 )
Norm@50keV : 1.25593E-03 ( -0.00125593 0.0114049 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.58 using 59 PHA bins.
# Reduced chi-squared = 0.9742 for 55 degrees of freedom
# Null hypothesis probability = 5.290630e-01
Photon flux (15-150 keV) in 376 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) = 2.57843e-07
S(50-100 keV) = 2.64824e-07
T90 vs. Hardness ratio plot
T90 = 376 sec.
Hardness ratio (energy fluence ratio) = 1.02707
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.27033
Count Ratio (50-100 keV) / (15-25 keV) = 0.666452
Mask shadow pattern
IMX = 2.476872011122637E-02, IMY = 2.595720980826888E-01
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:
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
0.000000 376.000000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.5628 -40.5204 1.8 42.6 -167.7 3.1106 6.5 2.6 Vela X-1
170.0293 -60.7697 0.0 18.5 156.9 0.5965 2.1 12.2 Cen X-3
187.0179 -62.8061 5.9 14.2 131.5 0.5548 2.0 10.1 GX 301-2
244.9845 -15.6315 0.7 51.9 1.0 14.5230 17.4 0.6 Sco X-1
255.9849 -37.8432 0.6 43.5 32.0 13.0769 18.8 0.1 4U 1700-377
256.2996 -36.3669 4.8 44.6 30.5 1.8735 2.4 7.4 GX 349+2
264.6134 -44.3446 188.2 45.3 44.9 -0.0647 -0.1 8.4 4U 1735-44
263.0829 -33.9635 6.0 50.4 32.6 2.6382 1.9 9.0 GX 354-0
278.6805 -82.1567 2.4 40.0 101.9 5.6018 4.7 ------ UNKNOWN
121.2571 -31.0494 3.7 57.6 -167.3 4.4039 3.1 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
-239.000000 963.064000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.5516 -40.5396 1.4 42.6 -167.8 9.5169 8.2 1.4 Vela X-1
170.1946 -60.7680 4.0 18.4 156.8 1.9199 2.9 9.4 Cen X-3
187.0053 -62.7875 21.1 14.2 131.6 0.3583 0.5 9.6 GX 301-2
244.9839 -15.6326 0.6 51.9 1.0 38.3437 21.1 0.5 Sco X-1
255.9780 -37.8405 1.0 43.5 32.0 17.2905 11.3 0.5 4U 1700-377
256.6005 -36.3805 4.5 44.8 30.7 -4.5252 -2.6 8.4 GX 349+2
264.8424 -44.4620 159.5 45.4 45.1 -0.1725 -0.1 4.3 4U 1735-44
262.8808 -33.7603 6.6 50.4 32.2 5.1401 1.7 7.0 GX 354-0
190.6877 -35.5091 2.4 14.6 -84.2 3.1102 4.9 ------ UNKNOWN
186.3258 -9.2619 2.2 41.1 -81.0 16.5567 5.2 ------ UNKNOWN
Plot creation:
Fri Oct 18 18:19:02 EDT 2013