Estimated redshift from machine learning (Ukwatta et al. 2016) - may take a few minutes to calcaulte
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
307.7526 +40.9974 0.0500 1.4 -48.2 0.0143 3.8 TRIG_01016013
------------------------------------------
Foreground time interval of the image:
-115.160 -115.080 (delta_t = 0.080 [sec])
Background time interval of the image:
-239.000 -115.160 (delta_t = 123.840 [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
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 -115.160 sec. to -115.080 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.78607 ( -0.655893 1.03468 )
Norm@50keV : 4.41733E-03 ( -0.00302641 0.00340001 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 47.32 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.16e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 0.08 sec: 1.04428 ( -0.490948 0.492095 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.893e-09 ( -2.00614e-09 2.25452e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from -115.160 sec. to -115.080 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -8.44127 ( )
Epeak [keV] : 27.6416 ( )
Norm@50keV : 2.64072E+05 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared 40.87 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 9.36e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 0.08 sec: 1.12423 ( -0.438524 0.47155 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.78178e-09 ( -1.45662e-09 1.68717e-09 ) ergs/cm2
Band function
Time interval is from -115.160 sec. to -115.080 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -5.54344 -5 )
beta : -9.35543 ( 9.33453 6.1826 )
Epeak [keV] : 27.5526 ( -5.43881 7.00018 )
Norm@50keV : 1005.45 ( -383.537 3570.38 )
------------------------------------------------------------
Photon flux (15-150 keV) in 0.08 sec: 8.53803E-02 ( 6.91462 -0.0175186 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.9008e-10 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 6.90198 (-1.89293 2.79777)
R^2/D10^2 : 2.66997 (-2.6726 7.44007)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 42.12 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 9.30e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.611e-09 1.016e-09
25- 50 2.146e-09 1.442e-09
50-150 3.378e-10 2.984e-10
15-150 4.094e-09 2.670e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 25.8776 (-12.9322 28.1556)
Norm : 10.9520 (-5.96124 13.533)
------------------------------------------------------------
#Fit statistic : Chi-Squared 44.48 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.86e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.640e-09 1.055e-09
25- 50 1.718e-09 1.170e-09
50-150 7.681e-10 7.280e-10
15-150 4.127e-09 2.692e-09
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.96905 (-6.96435 -6.96435)
R1^2/D10^2 : 2.47526 (-2.49042 -2.49042)
kT2 [keV] : 6.74830 (-7.02284 -7.02284)
R2^2/D10^2 : 0.104293 (-0.127235 -0.127235)
------------------------------------------------------------
#Fit statistic : Chi-Squared 42.12 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.99e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.597e-09 1.730e-03
25- 50 2.163e-09 1.394e-02
50-150 3.514e-10 3.156e-01
15-150 4.111e-09 3.383e-01
Peak spectrum fit
Power-law model
Time interval is from -115.612 sec. to -114.612 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.18694 ( -1.56676 3.88786 )
Norm@50keV : 5.91712E-04 ( -0.000593779 0.00131435 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 51.84 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 6.69e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 0.186986 ( -0.135013 0.144115 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.80005e-09 ( -7.81812e-09 9.88751e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from -115.612 sec. to -114.612 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -9.99319 ( 9.99379 12.0329 )
Epeak [keV] : 20.7780 ( -6.43372 9.05761 )
Norm@50keV : 1.61197E+07 ( -1.61649e+07 1.5257e+09 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 50.83 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 6.70e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 0.190029 0.189789 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 4.19987e-17 ( 0 0 ) ergs/cm2
Band function
Time interval is from -115.612 sec. to -114.612 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.41637 ( 9.41637 9.41637 )
beta : -3.20376 ( -3.87877 1.57294 )
Epeak [keV] : 12.3752 ( -12.3752 -12.3752 )
Norm@50keV : 7.90925E-02 ( -0.0808266 0.178515 )
------------------------------------------------------------
Photon flux (15-150 keV) in 1 sec: 8.53803E-02 ( 6.91462 -0.0175186 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.626e-09 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 4.95120 (-2.58439 4.46574)
R^2/D10^2 : 1.84549 (-1.84549 80.1696)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 51.05 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 6.97e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.315e-09 2.959e-09
25- 50 2.750e-09 2.046e-09
50-150 1.066e-10 1.434e-10
15-150 7.172e-09 4.815e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 14.5833 (-14.6843 69.6889)
Norm : 3.64104 (-3.63139 63.6989)
------------------------------------------------------------
#Fit statistic : Chi-Squared 51.36 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 6.86e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.091e-09 2.759e-09
25- 50 2.712e-09 2.263e-09
50-150 4.511e-10 6.250e-10
15-150 7.254e-09 5.235e-09
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.12064E-04 (5.15641 -0.000112064)
R1^2/D10^2 : 12.9463 (-12.9463 -12.9463)
kT2 [keV] : 4.95121 (-2.58439 4.46573)
R2^2/D10^2 : 1.84548 (-1.84549 80.1712)
------------------------------------------------------------
#Fit statistic : Chi-Squared 51.05 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 6.26e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.342e-09 4.227e-06
25- 50 2.639e-09 3.845e-05
50-150 1.236e-10 4.627e-04
15-150 7.105e-09 4.991e-04
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: 2.78607 ( -0.655893 1.03468 )
Norm@50keV : 4.41733E-03 ( -0.00302641 0.00340001 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 47.32 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.16e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 0.08 sec: 1.04428 ( -0.490948 0.492095 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.893e-09 ( -2.00614e-09 2.25452e-09 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -8.44127 ( )
Epeak [keV] : 27.6416 ( )
Norm@50keV : 2.64072E+05 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared 40.87 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 9.36e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 0.08 sec: 1.12423 ( -0.438524 0.47155 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.78178e-09 ( -1.45662e-09 1.68717e-09 ) ergs/cm2
Band function
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -5.54344 -5 )
beta : -9.35543 ( 9.33453 19.2581 )
Epeak [keV] : 27.5526 ( -5.43881 7.00018 )
Norm@50keV : 1005.45 ( -383.537 3570.38 )
------------------------------------------------------------
Photon flux (15-150 keV) in 0.08 sec: 8.53803E-02 ( 6.91462 -0.0175186 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.9008e-10 ( 0 0 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 1.31e-09
S(50-100 keV) = 7.74e-10
T90 vs. Hardness ratio plot
T90 = 0.0640000104904175 sec.
Hardness ratio (energy fluence ratio) = 0.59084
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.31888
Count Ratio (50-100 keV) / (15-25 keV) = 0.476149
Mask shadow pattern
IMX = 1.639911731029169E-02, IMY = 1.836322048521403E-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:
-239.000000 -115.160000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.4656 35.4155 4.0 42.7 -11.9 -1.3023 -2.9 4.4 Her X-1
288.8034 10.9712 4.6 35.6 -75.8 -1.7824 -2.5 1.6 GRS 1915+105
299.3669 35.0999 0.0 10.2 -58.7 1.1599 3.5 12.5 Cyg X-1
307.8765 40.9127 4.8 1.4 -53.2 0.7360 2.4 10.9 Cyg X-3
326.2211 38.4714 4.6 13.2 166.0 0.7123 2.5 9.3 Cyg X-2
316.1424 -2.8360 2.7 44.9 -121.8 5.8783 4.3 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-115.160000 -115.080000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.3617 35.2219 3.6 42.9 -12.1 0.0197 3.2 8.6 Her X-1
288.9276 10.9535 10.3 35.6 -76.0 0.0086 1.1 7.6 GRS 1915+105
299.4119 35.0890 7.4 10.2 -58.9 0.0061 1.6 11.1 Cyg X-1
307.9044 40.9668 4.5 1.3 -51.7 0.0095 2.6 9.4 Cyg X-3
326.1293 38.2348 6.7 13.2 167.0 0.0065 1.7 5.6 Cyg X-2
245.8940 38.5699 2.1 47.6 -3.8 0.0421 5.6 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
84.000600 143.760000
145.000000 663.110000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.4014 35.3906 89.4 41.6 -10.9 0.1349 0.1 4.0 Her X-1
288.8892 10.9411 4.6 34.4 -76.9 4.0415 2.5 5.4 GRS 1915+105
299.8148 35.3039 0.0 8.5 -61.4 -1.5189 -2.0 12.6 Cyg X-1
307.9007 40.9592 2.5 0.2 -164.6 3.2334 4.7 9.5 Cyg X-3
326.2870 38.1850 5.1 14.6 164.4 -1.5018 -2.3 9.8 Cyg X-2
225.0402 66.0120 3.4 50.3 37.4 8.9500 3.4 ------ UNKNOWN
299.2770 61.1898 4.1 20.8 57.5 2.2498 2.9 ------ UNKNOWN
310.8320 31.2082 2.9 10.2 -126.3 2.5159 3.9 ------ UNKNOWN
307.0718 23.9811 2.4 17.1 -109.0 3.6202 4.9 ------ UNKNOWN
347.7133 1.3083 3.9 53.7 -163.9 6.0376 3.0 ------ UNKNOWN
271.6215 15.3453 2.6 40.4 -49.8 6.4194 4.4 ------ UNKNOWN
321.0487 -5.3253 2.1 48.0 -129.0 16.4071 5.4 ------ UNKNOWN
299.7017 0.5230 4.2 41.2 -98.8 8.8879 2.8 ------ UNKNOWN
Plot creation:
Wed Jan 6 16:37:14 EST 2021