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Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
306.0183 +33.8819 0.0253 29.4 6.4 2.1624 7.6 TRIG_00668097
------------------------------------------
Foreground time interval of the image:
0.000 320.000 (delta_t = 320.000 [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 320.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.99153 ( -0.339167 0.375008 )
Norm@50keV : 3.34125E-04 ( -8.31221e-05 7.95456e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.98 using 59 PHA bins.
# Reduced chi-squared = 1.140 for 57 degrees of freedom
# Null hypothesis probability = 2.185373e-01
Photon flux (15-150 keV) in 320 sec: 4.99245E-02 ( -0.0092448 0.00924486 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.85584e-07 ( -2.23808e-07 2.32777e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 320.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.88413 ( -1.75977 0.266878 )
Epeak [keV] : 43.3610 ( )
Norm@50keV : 3.87582E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.96 using 59 PHA bins.
# Reduced chi-squared = 1.160 for 56 degrees of freedom
# Null hypothesis probability = 1.927757e-01
Photon flux (15-150 keV) in 320 sec: 4.97578E-02 ( -0.0094327 0.0093603 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.7335e-07 ( -2.67261e-07 2.42707e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 320.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.93517 ( 1.93517 1.76815 )
beta : -8.80807 ( 7.88017 17.8802 )
Epeak [keV] : 40.4661 ( -40.4661 -40.4661 )
Norm@50keV : 3.63873E-04 ( -6.73669e-05 0.000164171 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.97 using 59 PHA bins.
# Reduced chi-squared = 1.181 for 55 degrees of freedom
# Null hypothesis probability = 1.682798e-01
Photon flux (15-150 keV) in 320 sec: 4.92218E-02 ( ) 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] : 8.76606 (-1.81591 2.33051)
R^2/D10^2 : 3.83689E-02 (-0.0229961 0.0564354)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.43 using 59 PHA bins.
# Reduced chi-squared = 1.253 for 57 degrees of freedom
# Null hypothesis probability = 9.464050e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.811e-07 6.787e-08
25- 50 3.692e-07 1.191e-07
50-150 1.299e-07 7.541e-08
15-150 6.802e-07 2.243e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 64.6055 (-28.7923 78.5886)
Norm : 0.253726 (-0.0689522 0.102437)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.38 using 59 PHA bins.
# Reduced chi-squared = 1.147 for 57 degrees of freedom
# Null hypothesis probability = 2.086326e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.063e-07 5.578e-08
25- 50 3.210e-07 8.848e-08
50-150 3.877e-07 2.180e-07
15-150 9.150e-07 3.597e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.50995 (-2.50165 2.40797)
R1^2/D10^2 : 0.101826 (-0.0674609 0.431097)
kT2 [keV] : 31.2546 (-19.0217 -32.1614)
R2^2/D10^2 : 2.10295E-04 (-0.000199797 0.000834427)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.10 using 59 PHA bins.
# Reduced chi-squared = 1.166 for 55 degrees of freedom
# Null hypothesis probability = 1.875154e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.145e-07 1.255e-07
25- 50 3.051e-07 1.690e-07
50-150 4.571e-07 2.810e-07
15-150 9.766e-07 5.451e-07
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 320.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.99153 ( -0.339167 0.375008 )
Norm@50keV : 3.34125E-04 ( -8.31221e-05 7.95456e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.98 using 59 PHA bins.
# Reduced chi-squared = 1.140 for 57 degrees of freedom
# Null hypothesis probability = 2.185373e-01
Photon flux (15-150 keV) in 320 sec: 4.99245E-02 ( -0.0092448 0.00924486 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.85584e-07 ( -2.23808e-07 2.32777e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 320.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.88413 ( -1.75977 0.266878 )
Epeak [keV] : 43.3610 ( )
Norm@50keV : 3.87582E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.96 using 59 PHA bins.
# Reduced chi-squared = 1.160 for 56 degrees of freedom
# Null hypothesis probability = 1.927757e-01
Photon flux (15-150 keV) in 320 sec: 4.97578E-02 ( -0.0094327 0.0093603 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.7335e-07 ( -2.67261e-07 2.42707e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 320.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.93517 ( 1.93517 1.76815 )
beta : -8.80807 ( 7.88017 17.8802 )
Epeak [keV] : 40.4661 ( -40.4661 -40.4661 )
Norm@50keV : 3.63873E-04 ( -6.73669e-05 0.000164171 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.97 using 59 PHA bins.
# Reduced chi-squared = 1.181 for 55 degrees of freedom
# Null hypothesis probability = 1.682798e-01
Photon flux (15-150 keV) in 320 sec: 4.92218E-02 ( ) 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] : 8.76606 (-1.81591 2.33051)
R^2/D10^2 : 3.83689E-02 (-0.0229961 0.0564354)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.43 using 59 PHA bins.
# Reduced chi-squared = 1.253 for 57 degrees of freedom
# Null hypothesis probability = 9.464050e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.811e-07 6.115e-08
25- 50 3.692e-07 1.293e-07
50-150 1.299e-07 7.384e-08
15-150 6.802e-07 2.216e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 64.6055 (-28.7923 78.5886)
Norm : 0.253726 (-0.0689522 0.102437)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.38 using 59 PHA bins.
# Reduced chi-squared = 1.147 for 57 degrees of freedom
# Null hypothesis probability = 2.086326e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.063e-07 5.304e-08
25- 50 3.210e-07 9.658e-08
50-150 3.877e-07 2.253e-07
15-150 9.150e-07 2.957e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.50995 (-2.50165 2.40797)
R1^2/D10^2 : 0.101826 (-0.0674609 0.431097)
kT2 [keV] : 31.2546 (-19.0254 -32.1614)
R2^2/D10^2 : 2.10295E-04 (-0.000199797 0.000834427)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.10 using 59 PHA bins.
# Reduced chi-squared = 1.166 for 55 degrees of freedom
# Null hypothesis probability = 1.875154e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.145e-07 1.271e-07
25- 50 3.051e-07 1.701e-07
50-150 4.571e-07 2.918e-07
15-150 9.766e-07 5.205e-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: 1.99153 ( -0.339167 0.375008 )
Norm@50keV : 3.34125E-04 ( -8.31221e-05 7.95456e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.98 using 59 PHA bins.
# Reduced chi-squared = 1.140 for 57 degrees of freedom
# Null hypothesis probability = 2.185373e-01
Photon flux (15-150 keV) in 320 sec: 4.99245E-02 ( -0.0092448 0.00924486 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.85584e-07 ( -2.23808e-07 2.32777e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.88413 ( -1.75977 0.266878 )
Epeak [keV] : 43.3610 ( )
Norm@50keV : 3.87582E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.96 using 59 PHA bins.
# Reduced chi-squared = 1.160 for 56 degrees of freedom
# Null hypothesis probability = 1.927757e-01
Photon flux (15-150 keV) in 320 sec: 4.97578E-02 ( -0.0094327 0.0093603 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.7335e-07 ( -2.67261e-07 2.42707e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.93517 ( 1.93517 1.76815 )
beta : -8.80807 ( 7.88017 17.8802 )
Epeak [keV] : 40.4661 ( -40.4661 -40.4661 )
Norm@50keV : 3.63873E-04 ( -6.73669e-05 0.000164171 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.97 using 59 PHA bins.
# Reduced chi-squared = 1.181 for 55 degrees of freedom
# Null hypothesis probability = 1.682798e-01
Photon flux (15-150 keV) in 320 sec: 4.92218E-02 ( ) 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) = 2.96e-07
S(50-100 keV) = 2.98e-07
T90 vs. Hardness ratio plot
T90 = 320 sec.
Hardness ratio (energy fluence ratio) = 1.00676
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.833727
Count Ratio (50-100 keV) / (15-25 keV) = 0.412352
Mask shadow pattern
IMX = 5.597849545526488E-01, IMY = -6.253624457557976E-02
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 320.000000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
288.8254 11.0107 3.0 36.8 -44.0 1.5489 3.8 4.2 GRS 1915+105
299.5842 35.2033 0.4 34.2 1.5 8.8754 28.8 0.3 Cyg X-1
308.2209 41.0489 3.7 33.9 17.5 1.1831 3.1 7.6 Cyg X-3
326.1869 38.3351 24.7 27.2 42.1 -0.1577 -0.5 1.1 Cyg X-2
357.0522 -5.1939 2.8 34.6 158.9 1.7613 4.2 358.2 UNKNOWN
326.5663 25.9276 2.4 14.8 43.1 1.2395 4.8 ------ UNKNOWN
306.0183 33.8819 1.5 29.4 6.4 2.1624 7.6 ------ UNKNOWN
295.5958 33.2992 3.1 35.8 -4.5 1.2371 3.7 ------ UNKNOWN
341.4217 -37.6099 2.7 50.7 -153.0 3.3126 4.3 ------ UNKNOWN
269.1590 17.5535 2.8 55.6 -33.8 6.4143 4.1 ------ UNKNOWN
274.7120 9.3878 2.9 50.8 -44.5 5.8601 4.0 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
768.200600 963.075100
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
82.2689 -7.1257 2.5 40.5 131.0 2.4174 4.6 ------ UNKNOWN
75.6644 -5.8384 2.4 34.0 128.1 1.6524 4.9 ------ UNKNOWN
72.9781 -14.1175 2.7 31.6 143.6 1.1499 4.3 ------ UNKNOWN
64.0588 -50.6601 3.0 47.0 -160.6 1.4566 3.8 ------ UNKNOWN
34.3261 -43.9777 2.5 37.0 -132.6 1.3357 4.6 ------ UNKNOWN
40.8237 -49.6263 2.7 42.1 -140.5 1.3801 4.3 ------ UNKNOWN
62.8342 -63.2555 3.6 57.8 -152.3 3.3479 3.2 ------ UNKNOWN
351.4534 2.7757 2.4 51.0 -41.3 4.3303 4.9 539.0 UNKNOWN
351.1959 0.4994 4.0 50.8 -44.3 2.7383 2.9 529.1 UNKNOWN
Plot creation:
Thu Dec 24 13:26:07 EST 2015