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Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
166.0990 -23.2643 0.0425 36.9 -178.9 -0.0195 -4.5 TRIG_00578553
------------------------------------------
Foreground time interval of the image:
73.284 73.344 (delta_t = 0.060 [sec])
Background time interval of the image:
-179.000 -13.750 (delta_t = 165.250 [sec])
-13.000 73.284 (delta_t = 86.284 [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 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)
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 73.284 sec. to 73.344 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.318498 ( -0.350651 -0.350651 )
Norm@50keV : 5.00782E-05 ( -5.2683e-05 0.0010398 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.56 using 59 PHA bins.
# Reduced chi-squared = 1.168 for 57 degrees of freedom
# Null hypothesis probability = 1.810412e-01
Photon flux (15-150 keV) in 0.06 sec: 6.42227E-03 ( -0.00642222 0.249073 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.58442e-11 ( -4.58442e-11 6.56616e-10 ) ergs/cm2
Cutoff power-law model
Time interval is from 73.284 sec. to 73.344 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -9.56411 ( )
Epeak [keV] : 82.8983 ( -83.0251 -83.0251 )
Norm@50keV : 0.894905 ( -0.943494 17.6695 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.86 using 59 PHA bins.
# Reduced chi-squared = 1.176 for 56 degrees of freedom
# Null hypothesis probability = 1.724761e-01
Photon flux (15-150 keV) in 0.06 sec: 7.21597E-02 ( -0.0721597 0.281057 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.22763e-10 ( -1.30673e-10 1.69801e-10 ) ergs/cm2
Band function
Time interval is from 73.284 sec. to 73.344 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.05899 ( -2.71866 -2.71866 )
beta : -9.37167 ( 4.24935 4.24935 )
Epeak [keV] : 75.5479 ( -75.7868 -75.7868 )
Norm@50keV : 6.64188E-02 ( -0.0641942 14.3125 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.21 using 59 PHA bins.
# Reduced chi-squared = 1.204 for 55 degrees of freedom
# Null hypothesis probability = 1.431765e-01
Photon flux (15-150 keV) in 0.06 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] : 5.00000 (-5 -5)
R^2/D10^2 : 0.0 (0 0)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.61 using 59 PHA bins.
# Reduced chi-squared = 1.186 for 57 degrees of freedom
# Null hypothesis probability = 1.586617e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.00000 (-7 -7)
Norm : 0.0 (0 0)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.61 using 59 PHA bins.
# Reduced chi-squared = 1.186 for 57 degrees of freedom
# Null hypothesis probability = 1.586617e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Double BB
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.61 using 59 PHA bins.
#Fit statistic : Chi-Squared = 66.65 using 59 PHA bins.
#Fit statistic : Chi-Squared = 66.61 using 59 PHA bins.
#Fit statistic : Chi-Squared = 66.45 using 59 PHA bins.
# Reduced chi-squared = 1.229 for 55 degrees of freedom
# Reduced chi-squared = 1.212 for 55 degrees of freedom
# Reduced chi-squared = 1.211 for 55 degrees of freedom
# Reduced chi-squared = 1.208 for 55 degrees of freedom
# Null hypothesis probability = 1.182196e-01
# Null hypothesis probability = 1.349100e-01
# Null hypothesis probability = 1.356568e-01
# Null hypothesis probability = 1.385240e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Peak spectrum fit
Power-law model
Time interval is from 72.816 sec. to 73.816 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.50000 ( -1.5 -1.5 )
Norm@50keV : 0.0 ( 0 0.00175433 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.01 using 59 PHA bins.
# Reduced chi-squared = 1.000 for 57 degrees of freedom
# Null hypothesis probability = 4.747910e-01
Photon flux (15-150 keV) in 1 sec: 5.15316E-02 ( -0.0515316 0.144234 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.47179e-09 ( -8.47179e-09 2.04091e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 72.816 sec. to 73.816 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 0.0 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.01 using 59 PHA bins.
# Reduced chi-squared = 1.018 for 56 degrees of freedom
# Null hypothesis probability = 4.373751e-01
Photon flux (15-150 keV) in 1 sec: 7.81544E-02 ( -0.0781544 0.128346 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.37938e-09 ( -2.17788e-09 2.83002e-09 ) ergs/cm2
Band function
Time interval is from 72.816 sec. to 73.816 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.999826 ( 0.98395 0.98395 )
beta : 1.09302 ( 2.5 2.5 )
Epeak [keV] : 0.984277 ( -80 -80 )
Norm@50keV : 3.04306E-02 ( -0.0295406 1.52772e+07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.50 using 59 PHA bins.
# Reduced chi-squared = 1.027 for 55 degrees of freedom
# Null hypothesis probability = 4.186561e-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] : 199.321 ( )
R^2/D10^2 : 2.22436E-05 (-3.21552e-05 -3.21552e-05)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.56 using 59 PHA bins.
# Reduced chi-squared = 0.9923 for 57 degrees of freedom
# Null hypothesis probability = 4.914289e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.088e-10 3.436e-10
25- 50 1.965e-10 2.972e-11
50-150 1.882e-12 1.384e-15
15-150 8.072e-10 1.944e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 8.14043 (-8.14483 -8.14483)
Norm : 0.170611 (-0.169812 -0.169812)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.01 using 59 PHA bins.
# Reduced chi-squared = 1.000 for 57 degrees of freedom
# Null hypothesis probability = 4.748248e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.671e-11 0.000e+00
25- 50 2.449e-11 0.000e+00
50-150 9.128e-13 0.000e+00
15-150 1.021e-10 0.000e+00
Double BB
#Fit statistic : Chi-Squared = 56.65 using 59 PHA bins.
#Fit statistic : Chi-Squared = 56.52 using 59 PHA bins.
#Fit statistic : Chi-Squared = 56.48 using 59 PHA bins.
# Reduced chi-squared = 1.036 for 55 degrees of freedom
# Reduced chi-squared = 1.031 for 55 degrees of freedom
# Reduced chi-squared = 1.030 for 55 degrees of freedom
# Reduced chi-squared = 1.028 for 55 degrees of freedom
# Reduced chi-squared = 1.027 for 55 degrees of freedom
# Null hypothesis probability = 4.018790e-01
# Null hypothesis probability = 4.120823e-01
# Null hypothesis probability = 4.132986e-01
# Null hypothesis probability = 4.181137e-01
# Null hypothesis probability = 4.193200e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+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: 0.318498 ( -0.350651 -0.350651 )
Norm@50keV : 5.00782E-05 ( -5.2683e-05 0.0010398 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.56 using 59 PHA bins.
# Reduced chi-squared = 1.168 for 57 degrees of freedom
# Null hypothesis probability = 1.810412e-01
Photon flux (15-150 keV) in 0.06 sec: 6.42227E-03 ( -0.00642222 0.249073 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.58442e-11 ( -4.58442e-11 6.56616e-10 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -9.56411 ( )
Epeak [keV] : 82.8983 ( -83.0251 -83.0251 )
Norm@50keV : 0.894905 ( -0.943494 17.6695 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.86 using 59 PHA bins.
# Reduced chi-squared = 1.176 for 56 degrees of freedom
# Null hypothesis probability = 1.724761e-01
Photon flux (15-150 keV) in 0.06 sec: 7.21597E-02 ( -0.0721597 0.281057 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.22763e-10 ( -1.30673e-10 1.69801e-10 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.05899 ( -2.71866 -2.71866 )
beta : -9.37167 ( 4.24935 4.24935 )
Epeak [keV] : 75.5479 ( -75.7868 -75.7868 )
Norm@50keV : 6.64188E-02 ( -0.0641942 14.3125 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.21 using 59 PHA bins.
# Reduced chi-squared = 1.204 for 55 degrees of freedom
# Null hypothesis probability = 1.431765e-01
Photon flux (15-150 keV) in 0.06 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) = 5.24434e-12
S(50-100 keV) = 1.6388e-11
T90 vs. Hardness ratio plot
T90 = 0.0559999942779541 sec.
Hardness ratio (energy fluence ratio) = 3.12489
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.38958
Count Ratio (50-100 keV) / (15-25 keV) = 0.572232
Mask shadow pattern
IMX = -7.494125274180470E-01, IMY = 1.397405495469132E-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:
-179.000000 -13.750000
-13.000000 73.284000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.5109 -40.4603 4.7 28.9 124.0 1.1091 2.5 5.7 Vela X-1
170.3808 -60.6561 1.4 0.7 -12.0 2.3559 8.5 2.8 Cen X-3
186.8469 -62.8957 5.1 8.5 -56.1 0.6773 2.3 9.2 GX 301-2
114.2018 -38.9750 3.6 40.2 102.7 3.5449 3.2 ------ UNKNOWN
59.7035 -65.4930 3.4 44.2 40.9 3.1477 3.4 ------ UNKNOWN
356.8153 -63.9462 3.3 55.9 10.6 6.9469 3.5 ------ UNKNOWN
293.0667 -82.0440 4.7 34.9 -4.7 0.9107 2.5 ------ UNKNOWN
183.7932 -3.2299 2.9 57.8 -156.6 6.2240 4.0 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
73.284000 73.344000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.2716 -40.6395 0.0 28.8 123.4 0.0012 0.3 12.8 Vela X-1
170.4939 -60.4605 7.6 0.5 -25.0 0.0049 1.5 11.1 Cen X-3
186.6667 -62.9244 4.7 8.5 -55.8 0.0069 2.4 9.3 GX 301-2
0.5563 -68.8567 2.1 50.9 11.9 0.0523 5.5 ------ UNKNOWN
340.5842 -75.1220 2.2 44.7 3.5 0.0275 5.2 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
133.400590 716.750000
720.000000 963.047700
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.5786 -40.6289 3.1 30.9 35.0 3.2434 3.7 5.0 Vela X-1
170.2138 -60.6047 1.8 37.4 -17.0 4.8086 6.5 3.2 Cen X-3
186.7282 -62.7596 80.7 41.9 -27.6 0.1304 0.1 2.1 GX 301-2
122.7931 -64.1835 3.4 49.7 9.4 4.7462 3.4 ------ UNKNOWN
Plot creation:
Sun Nov 24 21:03:45 EST 2013