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Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
75.0967 +45.0978 0.0536 51.3 -164.7 0.6732 3.6 TRIG_00678197
------------------------------------------
Foreground time interval of the image:
0.000 64.000 (delta_t = 64.000 [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 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.62806 ( -0.537913 0.697654 )
Norm@50keV : 5.94228E-04 ( -0.000299744 0.000319491 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.55 using 59 PHA bins.
# Reduced chi-squared = 1.045 for 57 degrees of freedom
# Null hypothesis probability = 3.828552e-01
Photon flux (15-150 keV) in 64 sec: 0.126749 ( -0.0451387 0.0452131 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.95508e-07 ( -1.54265e-07 1.68091e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -10.0000 ( )
Epeak [keV] : 32.4247 ( )
Norm@50keV : 5.81328E+04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.44 using 59 PHA bins.
# Reduced chi-squared = 0.8293 for 56 degrees of freedom
# Null hypothesis probability = 8.149954e-01
Photon flux (15-150 keV) in 64 sec: 0.118950 0.117724 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.26584e-17 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -3.99495 -5 )
beta : -9.37167 ( 9.37167 19.3041 )
Epeak [keV] : 32.0823 ( -4.91013 5.52944 )
Norm@50keV : 40.8846 ( -11.7007 79.7494 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.91 using 59 PHA bins.
# Reduced chi-squared = 0.8711 for 55 degrees of freedom
# Null hypothesis probability = 7.399513e-01
Photon flux (15-150 keV) in 64 sec: 0.133176 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.92114e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.99754 (-1.68808 2.12285)
R^2/D10^2 : 0.171559 (-0.108851 0.280746)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.98 using 59 PHA bins.
# Reduced chi-squared = 0.8768 for 57 degrees of freedom
# Null hypothesis probability = 7.335776e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.270e-07 7.846e-08
25- 50 2.221e-07 1.343e-07
50-150 5.826e-08 4.614e-08
15-150 4.073e-07 2.483e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 29.4882 (-11.9997 22.5998)
Norm : 1.14103 (-0.494558 0.878443)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.88 using 59 PHA bins.
# Reduced chi-squared = 0.9628 for 57 degrees of freedom
# Null hypothesis probability = 5.550935e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.473e-07 9.104e-08
25- 50 1.667e-07 1.055e-07
50-150 8.925e-08 7.307e-08
15-150 4.033e-07 2.467e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.99245 (-7.99388 -7.99388)
R1^2/D10^2 : 5.10039E-02 (-0.051134 -0.051134)
kT2 [keV] : 8.00211 (-7.99607 -7.99607)
R2^2/D10^2 : 0.120395 (-0.120567 -0.120567)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.98 using 59 PHA bins.
# Reduced chi-squared = 0.9087 for 55 degrees of freedom
# Null hypothesis probability = 6.664526e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.269e-07 1.063e+01
25- 50 2.221e-07 8.685e+01
50-150 5.830e-08 2.118e+03
15-150 4.073e-07 2.164e+03
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.62806 ( -0.537913 0.697654 )
Norm@50keV : 5.94228E-04 ( -0.000299744 0.000319491 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.55 using 59 PHA bins.
# Reduced chi-squared = 1.045 for 57 degrees of freedom
# Null hypothesis probability = 3.828552e-01
Photon flux (15-150 keV) in 64 sec: 0.126749 ( -0.0451387 0.0452131 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.95508e-07 ( -1.54265e-07 1.68091e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -10.0000 ( )
Epeak [keV] : 32.4247 ( )
Norm@50keV : 5.81328E+04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.44 using 59 PHA bins.
# Reduced chi-squared = 0.8293 for 56 degrees of freedom
# Null hypothesis probability = 8.149954e-01
Photon flux (15-150 keV) in 64 sec: 0.118950 0.117724 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.26584e-17 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -3.99495 -5 )
beta : -9.37167 ( 9.37167 19.3041 )
Epeak [keV] : 32.0823 ( -4.91013 5.52944 )
Norm@50keV : 40.8846 ( -11.7007 79.7494 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.91 using 59 PHA bins.
# Reduced chi-squared = 0.8711 for 55 degrees of freedom
# Null hypothesis probability = 7.399513e-01
Photon flux (15-150 keV) in 64 sec: 0.133176 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.92114e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.99754 (-1.68808 2.12285)
R^2/D10^2 : 0.171559 (-0.108851 0.280746)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.98 using 59 PHA bins.
# Reduced chi-squared = 0.8768 for 57 degrees of freedom
# Null hypothesis probability = 7.335776e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.270e-07 7.904e-08
25- 50 2.221e-07 1.360e-07
50-150 5.826e-08 4.214e-08
15-150 4.073e-07 2.563e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 29.4882 (-11.9997 22.5998)
Norm : 1.14103 (-0.494558 0.878443)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.88 using 59 PHA bins.
# Reduced chi-squared = 0.9628 for 57 degrees of freedom
# Null hypothesis probability = 5.550935e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.473e-07 8.345e-08
25- 50 1.667e-07 1.024e-07
50-150 8.925e-08 7.312e-08
15-150 4.033e-07 2.469e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.99245 (-7.99388 -7.99388)
R1^2/D10^2 : 5.10039E-02 (-0.051134 -0.051134)
kT2 [keV] : 8.00211 (-7.99607 -7.99607)
R2^2/D10^2 : 0.120395 (-0.120567 -0.120567)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.98 using 59 PHA bins.
# Reduced chi-squared = 0.9087 for 55 degrees of freedom
# Null hypothesis probability = 6.664526e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.269e-07 1.057e+01
25- 50 2.221e-07 8.867e+01
50-150 5.830e-08 2.032e+03
15-150 4.073e-07 2.417e+03
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: 2.62806 ( -0.537913 0.697654 )
Norm@50keV : 5.94228E-04 ( -0.000299744 0.000319491 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.55 using 59 PHA bins.
# Reduced chi-squared = 1.045 for 57 degrees of freedom
# Null hypothesis probability = 3.828552e-01
Photon flux (15-150 keV) in 64 sec: 0.126749 ( -0.0451387 0.0452131 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.95508e-07 ( -1.54265e-07 1.68091e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -10.0000 ( )
Epeak [keV] : 32.4247 ( )
Norm@50keV : 5.81328E+04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.44 using 59 PHA bins.
# Reduced chi-squared = 0.8293 for 56 degrees of freedom
# Null hypothesis probability = 8.149954e-01
Photon flux (15-150 keV) in 64 sec: 0.118950 0.117724 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.26584e-17 ( 0 0 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -3.99495 -5 )
beta : -9.37167 ( 9.37167 19.3041 )
Epeak [keV] : 32.0823 ( -4.91013 5.52944 )
Norm@50keV : 40.8846 ( -11.7007 79.7494 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.91 using 59 PHA bins.
# Reduced chi-squared = 0.8711 for 55 degrees of freedom
# Null hypothesis probability = 7.399513e-01
Photon flux (15-150 keV) in 64 sec: 0.133176 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.92114e-07 ( 0 0 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 1.33e-07
S(50-100 keV) = 8.64e-08
T90 vs. Hardness ratio plot
T90 = 64 sec.
Hardness ratio (energy fluence ratio) = 0.649624
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.95848
Count Ratio (50-100 keV) / (15-25 keV) = -0.0349377
Mask shadow pattern
IMX = -1.203357175406024E+00, IMY = 3.291725126380255E-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 64.000000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.4774 35.3351 323.6 49.6 -0.5 -0.0064 -0.0 1.1 Her X-1
194.6629 43.9421 2.5 34.7 67.3 0.7505 4.6 ------ UNKNOWN
108.6929 35.5067 2.0 54.5 161.3 2.4787 5.8 ------ UNKNOWN
91.5537 46.3564 2.5 47.3 -179.0 0.7407 4.6 ------ UNKNOWN
349.2918 59.6850 3.1 40.8 -93.5 1.3920 3.8 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
567.200600 963.078700
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
299.5970 35.1977 0.4 38.0 -6.5 11.7493 27.8 0.4 Cyg X-1
308.1561 40.9420 1.5 29.3 -9.6 2.3211 7.6 2.2 Cyg X-3
326.2201 38.3665 2.5 23.9 -39.2 1.3658 4.5 3.5 Cyg X-2
35.0809 71.1330 2.9 23.3 140.2 1.3457 3.9 ------ UNKNOWN
70.7554 40.3236 3.3 54.2 171.3 5.1467 3.5 ------ UNKNOWN
327.3722 63.1368 2.7 9.6 45.2 1.1792 4.3 ------ UNKNOWN
320.1217 59.1675 2.5 12.9 23.5 1.1710 4.6 ------ UNKNOWN
351.5681 18.3173 3.3 40.9 -87.5 5.8045 3.5 ------ UNKNOWN
Plot creation:
Tue Mar 8 13:14:01 EST 2016