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Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
257.2602 -36.4671 0.0795 0.1 21.2 0.5196 2.4 TRIG_00677582
------------------------------------------
Foreground time interval of the image:
0.000 131.900 (delta_t = 131.900 [sec])
133.000 183.062 (delta_t = 50.062 [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
Multiple GTIs in the spectrum
tstart tstop
0.000000 131.900000
133.000000 183.061900
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.63975 ( -0.675914 0.736259 )
Norm@50keV : 1.91255E-04 ( -8.06552e-05 7.75616e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.73 using 59 PHA bins.
# Reduced chi-squared = 0.8724 for 57 degrees of freedom
# Null hypothesis probability = 7.419525e-01
Photon flux (15-150 keV) in 182 sec: 2.48895E-02 ( -0.00963598 0.0096925 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.24055e-07 ( -1.37662e-07 1.45558e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
0.000000 131.900000
133.000000 183.061900
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.129249 ( -7.12537 2.02626 )
Epeak [keV] : 59.9203 ( -59.9208 -59.9208 )
Norm@50keV : 1.12570E-03 ( -0.00112573 22.7285 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.99 using 59 PHA bins.
# Reduced chi-squared = 0.8748 for 56 degrees of freedom
# Null hypothesis probability = 7.352747e-01
Photon flux (15-150 keV) in 182 sec: 2.30815E-02 ( -0.0105618 0.0103324 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.90534e-07 ( -1.33106e-07 1.57765e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
0.000000 131.900000
133.000000 183.061900
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.277281 ( 0.728086 0.728086 )
beta : -10.0000 ( 10 3.55271e-15 )
Epeak [keV] : 61.0344 ( -39.6651 208.893 )
Norm@50keV : 9.54297E-04 ( -0.000953939 0.549784 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.99 using 59 PHA bins.
# Reduced chi-squared = 0.8908 for 55 degrees of freedom
# Null hypothesis probability = 7.022797e-01
Photon flux (15-150 keV) in 182 sec: 2.38555E-02 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.4265e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.9251 (-4.71288 7.91951)
R^2/D10^2 : 3.67500E-03 (-0.00367524 0.0125731)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.33 using 59 PHA bins.
# Reduced chi-squared = 0.8654 for 57 degrees of freedom
# Null hypothesis probability = 7.549450e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.741e-08 1.799e-08
25- 50 1.014e-07 6.353e-08
50-150 1.291e-07 9.093e-08
15-150 2.579e-07 1.636e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 148.687 (-105.866 -144.884)
Norm : 0.103251 (-0.0409569 0.0718357)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.37 using 59 PHA bins.
# Reduced chi-squared = 0.8661 for 57 degrees of freedom
# Null hypothesis probability = 7.537179e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.830e-08 2.875e-08
25- 50 8.941e-08 5.553e-08
50-150 1.758e-07 1.195e-07
15-150 3.135e-07 2.007e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.86713 (-2.86712 20.2819)
R1^2/D10^2 : 0.879988 (-0.881621 10.5549)
kT2 [keV] : 15.3969 (-5.54208 -15.3964)
R2^2/D10^2 : 2.42691E-03 (-0.00215709 0.0103214)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.55 using 59 PHA bins.
# Reduced chi-squared = 0.8827 for 55 degrees of freedom
# Null hypothesis probability = 7.179185e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.430e-08 2.087e-08
25- 50 9.158e-08 5.480e-08
50-150 1.449e-07 9.528e-08
15-150 2.808e-07 1.618e-07
Peak spectrum fit
Power-law model
Time interval is from 133.000 sec. to 183.062 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.63975 ( -0.675914 0.736259 )
Norm@50keV : 1.91255E-04 ( -8.06552e-05 7.75616e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.73 using 59 PHA bins.
# Reduced chi-squared = 0.8724 for 57 degrees of freedom
# Null hypothesis probability = 7.419525e-01
Photon flux (15-150 keV) in 182 sec: 2.48895E-02 ( -0.00963598 0.0096925 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.24055e-07 ( -1.37662e-07 1.45558e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 133.000 sec. to 183.062 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.129249 ( -7.12537 2.07265 )
Epeak [keV] : 59.9203 ( -59.9208 -59.9208 )
Norm@50keV : 1.12570E-03 ( -0.00112573 22.7285 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.99 using 59 PHA bins.
# Reduced chi-squared = 0.8748 for 56 degrees of freedom
# Null hypothesis probability = 7.352747e-01
Photon flux (15-150 keV) in 182 sec: 2.30815E-02 ( -0.0105618 0.0103324 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.90534e-07 ( -1.33106e-07 1.57765e-07 ) ergs/cm2
Band function
Time interval is from 133.000 sec. to 183.062 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.277281 ( 0.728086 0.728086 )
beta : -10.0000 ( 10 0 )
Epeak [keV] : 61.0344 ( -35.0957 208.892 )
Norm@50keV : 9.54297E-04 ( -0.000953939 0.549784 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.99 using 59 PHA bins.
# Reduced chi-squared = 0.8908 for 55 degrees of freedom
# Null hypothesis probability = 7.022797e-01
Photon flux (15-150 keV) in 182 sec: 2.38555E-02 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.4265e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.9251 (-4.71288 7.91951)
R^2/D10^2 : 3.67500E-03 (-0.00367524 0.0125731)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.33 using 59 PHA bins.
# Reduced chi-squared = 0.8654 for 57 degrees of freedom
# Null hypothesis probability = 7.549450e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.741e-08 1.789e-08
25- 50 1.014e-07 6.338e-08
50-150 1.291e-07 9.300e-08
15-150 2.579e-07 1.696e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 148.687 (-105.866 -144.884)
Norm : 0.103251 (-0.0409569 0.0718357)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.37 using 59 PHA bins.
# Reduced chi-squared = 0.8661 for 57 degrees of freedom
# Null hypothesis probability = 7.537179e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.830e-08 2.907e-08
25- 50 8.941e-08 5.414e-08
50-150 1.758e-07 1.158e-07
15-150 3.135e-07 1.972e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.86713 (-2.86712 20.2819)
R1^2/D10^2 : 0.879988 (-0.881621 10.3267)
kT2 [keV] : 15.3969 (-5.54208 -15.3964)
R2^2/D10^2 : 2.42691E-03 (-0.00242691 0.0103637)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.55 using 59 PHA bins.
# Reduced chi-squared = 0.8827 for 55 degrees of freedom
# Null hypothesis probability = 7.179185e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.430e-08 1.978e-08
25- 50 9.158e-08 6.074e-08
50-150 1.449e-07 1.022e-07
15-150 2.808e-07 1.671e-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: 1.63975 ( -0.675914 0.736259 )
Norm@50keV : 1.91255E-04 ( -8.06552e-05 7.75616e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.73 using 59 PHA bins.
# Reduced chi-squared = 0.8724 for 57 degrees of freedom
# Null hypothesis probability = 7.419525e-01
Photon flux (15-150 keV) in 182 sec: 2.48895E-02 ( -0.00963598 0.0096925 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.24055e-07 ( -1.37662e-07 1.45558e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.129249 ( -7.12537 2.07742 )
Epeak [keV] : 59.9203 ( -59.9208 -59.9208 )
Norm@50keV : 1.12570E-03 ( -0.00112573 22.7285 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.99 using 59 PHA bins.
# Reduced chi-squared = 0.8748 for 56 degrees of freedom
# Null hypothesis probability = 7.352747e-01
Photon flux (15-150 keV) in 182 sec: 2.30815E-02 ( -0.0105618 0.0103324 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.90534e-07 ( -1.33106e-07 1.57765e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.277281 ( 0.728086 0.728086 )
beta : -10.0000 ( 10 20 )
Epeak [keV] : 61.0344 ( -33.8664 208.904 )
Norm@50keV : 9.54297E-04 ( -0.000953939 0.549784 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.99 using 59 PHA bins.
# Reduced chi-squared = 0.8908 for 55 degrees of freedom
# Null hypothesis probability = 7.022797e-01
Photon flux (15-150 keV) in 182 sec: 2.38555E-02 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.4265e-07 ( 0 0 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 8.55e-08
S(50-100 keV) = 1.10e-07
T90 vs. Hardness ratio plot
T90 = 376 sec.
Hardness ratio (energy fluence ratio) = 1.28655
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.71648
Count Ratio (50-100 keV) / (15-25 keV) = 0.898261
Mask shadow pattern
IMX = 1.390876195112353E-03, IMY = -5.396509300375115E-04
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 131.900000
133.000000 183.061900
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
186.4915 -62.7469 4.0 49.6 27.6 2.3345 2.9 4.7 GX 301-2
244.9720 -15.6489 0.2 23.5 141.8 14.2037 60.0 0.7 Sco X-1
255.9568 -37.7606 4.2 1.7 30.8 0.5930 2.7 5.2 4U 1700-377
256.6429 -36.2939 14.1 0.5 93.1 0.1727 0.8 12.7 GX 349+2
262.9717 -24.7070 4.4 12.7 -162.9 0.5862 2.7 3.1 GX 1+4
264.7280 -44.3005 4.3 9.7 -40.3 0.5625 2.7 9.0 4U 1735-44
268.3688 -1.4525 101.8 36.4 -168.2 0.0293 0.1 0.0 SW J1753.5-0127
270.1230 -25.1528 3.7 15.7 -139.2 0.6649 3.2 9.8 GX 5-1
270.1950 -25.8122 2.3 15.3 -137.3 1.0797 5.1 7.1 GRS 1758-258
274.0763 -14.1203 3.9 26.8 -148.8 0.6461 2.9 6.5 GX 17+2
275.8467 -30.3407 5.8 16.6 -113.1 0.4324 2.0 4.4 H1820-303
284.8893 -25.0176 40.7 26.2 -115.0 0.0762 0.3 9.9 HT1900.1-2455
288.7534 10.9966 22.0 55.9 -148.8 0.8064 0.5 4.1 GRS 1915+105
263.0547 -33.8001 8.4 5.4 -124.2 0.2682 1.4 3.9 GX 354-0
205.4697 -45.7706 2.4 39.5 52.6 2.4716 4.9 ------ UNKNOWN
241.0860 -11.4421 2.2 28.9 138.5 1.4787 5.2 ------ UNKNOWN
266.5809 -32.2534 1.7 8.7 -122.8 1.3223 6.9 ------ UNKNOWN
323.8684 -82.1149 2.6 50.8 -16.4 2.2417 4.5 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
Plot creation:
Fri Mar 4 20:16:33 EST 2016