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
297.3232 +48.1823 0.2342 3.2 -149.2 -1.1433 -0.8 TRIG_00752193
------------------------------------------
Foreground time interval of the image:
-32.868 18.005 (delta_t = 50.873 [sec])
Background time interval of the image:
-33.195 -32.868 (delta_t = 0.327 [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 -32.868 sec. to 26.372 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.54786 ( -0.276711 0.287357 )
Norm@50keV : 1.27862E-03 ( -0.000248056 0.000243266 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 93.85 using 59 PHA bins.
# Reduced chi-squared = 1.647 for 57 degrees of freedom
# Null hypothesis probability = 1.524149e-03
Photon flux (15-150 keV) in 59.24 sec: 0.161765 ( -0.0273982 0.0274095 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.1325e-07 ( -1.48752e-07 1.55331e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -32.868 sec. to 26.372 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.71363 ( -4.72681 2.08243 )
Epeak [keV] : 43.6821 ( -7.25672 18.1029 )
Norm@50keV : 0.116548 ( -0.127268 62.2914 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 86.84 using 59 PHA bins.
# Reduced chi-squared = 1.551 for 56 degrees of freedom
# Null hypothesis probability = 5.154532e-03
Photon flux (15-150 keV) in 59.24 sec: 0.146168 ( -0.027251 0.02789 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.08769e-07 ( -1.14839e-07 1.65252e-07 ) ergs/cm2
Band function
Time interval is from -32.868 sec. to 26.372 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.71043 ( -2.63915 -2.82466 )
beta : -2.85803 ( 2.84087 0.920474 )
Epeak [keV] : 38.5699 ( -7.96029 10.8305 )
Norm@50keV : 2.35823 ( -2.35778 5.22603 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 84.57 using 59 PHA bins.
# Reduced chi-squared = 1.538 for 55 degrees of freedom
# Null hypothesis probability = 6.356129e-03
Photon flux (15-150 keV) in 59.24 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 5.91033e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 11.2801 (-1.63057 2.01484)
R^2/D10^2 : 5.37566E-02 (-0.0243301 0.0404577)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 86.99 using 59 PHA bins.
# Reduced chi-squared = 1.526 for 57 degrees of freedom
# Null hypothesis probability = 6.420879e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.505e-08 2.600e-08
25- 50 2.483e-07 5.885e-08
50-150 1.819e-07 7.008e-08
15-150 5.152e-07 1.144e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 154.829 (-80.6256 -152.59)
Norm : 0.673080 (-0.115838 0.147716)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 92.15 using 59 PHA bins.
# Reduced chi-squared = 1.617 for 57 degrees of freedom
# Null hypothesis probability = 2.207513e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.021e-07 5.755e-08
25- 50 1.902e-07 1.057e-07
50-150 3.802e-07 2.296e-07
15-150 6.726e-07 3.895e-07
Double BB
R1^2/D10^2 : 1.30363E-05 (-1.30363e-05 -1.30363e-05)
kT2 [keV] : 10.3399 (-1.5874 2.07138)
R2^2/D10^2 : 6.82029E-02 (-0.0321779 0.0497884)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 86.99 using 59 PHA bins.
#Fit statistic : Chi-Squared = 84.88 using 59 PHA bins.
#Fit statistic : Chi-Squared = 84.67 using 59 PHA bins.
# Reduced chi-squared = 1.582 for 55 degrees of freedom
# Reduced chi-squared = 1.543 for 55 degrees of freedom
# Reduced chi-squared = 1.539 for 55 degrees of freedom
# Null hypothesis probability = 3.859489e-03
# Null hypothesis probability = 5.972940e-03
# Null hypothesis probability = 6.232044e-03
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 0.044 sec. to 1.044 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.90710 ( -0.474441 2.20734 )
Norm@50keV : 6.15298E-04 ( -0.000615282 0.00423144 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.12 using 59 PHA bins.
# Reduced chi-squared = 1.020 for 57 degrees of freedom
# Null hypothesis probability = 4.337007e-01
Photon flux (15-150 keV) in 1 sec: 0.475695 0.257698 ( -0.190192 0.400533 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.37972e-15 ( -3.36054e-08 4.99238e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.044 sec. to 1.044 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.720624 ( -5.74738 1.28501 )
Epeak [keV] : 1.00000E+04 ( -10000 -10000 )
Norm@50keV : 2.59408E-03 ( -0.00259543 -0.00259543 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.52 using 59 PHA bins.
# Reduced chi-squared = 1.045 for 56 degrees of freedom
# Null hypothesis probability = 3.828941e-01
Photon flux (15-150 keV) in 1 sec: 0.483828 0.243087 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.76713e-15 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.044 sec. to 1.044 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -6.80268E-02 ( 0.12459 0.12459 )
beta : 1.90759 ( -2.16309 0.475559 )
Epeak [keV] : 13.8493 ( -13.8513 -13.8513 )
Norm@50keV : 1.21927E-03 ( -0.00121967 6163.5 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.12 using 59 PHA bins.
# Reduced chi-squared = 1.057 for 55 degrees of freedom
# Null hypothesis probability = 3.610290e-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] : 200.000 (-200 -200)
R^2/D10^2 : 2.65468E-04 (-8.89989e-05 -0.000265316)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.66 using 59 PHA bins.
# Reduced chi-squared = 1.029 for 57 degrees of freedom
# Null hypothesis probability = 4.144678e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.413e-10 3.692e-10
25- 50 3.558e-09 2.835e-09
50-150 6.954e-08 6.700e-08
15-150 7.354e-08 7.665e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.359 (-104.246 -199.362)
Norm : 1.49905 (-0.858696 0.861877)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.47 using 59 PHA bins.
# Reduced chi-squared = 1.307 for 57 degrees of freedom
# Null hypothesis probability = 5.998283e-02
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
R1^2/D10^2 : 1.11234E-02 (-0.00540084 -0.00540084)
kT2 [keV] : 200.000 (-200 -200)
R2^2/D10^2 : 2.49037E-04 (-0.000252524 -0.000252524)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.93 using 59 PHA bins.
#Fit statistic : Chi-Squared = 58.66 using 59 PHA bins.
#Fit statistic : Chi-Squared = 58.47 using 59 PHA bins.
# Reduced chi-squared = 1.071 for 55 degrees of freedom
# Reduced chi-squared = 1.067 for 55 degrees of freedom
# Reduced chi-squared = 1.063 for 55 degrees of freedom
# Null hypothesis probability = 3.339470e-01
# Null hypothesis probability = 3.428870e-01
# Null hypothesis probability = 3.491888e-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: 1.48320 ( -0.292532 0.301385 )
Norm@50keV : 1.28762E-03 ( -0.000257565 0.000253059 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 94.68 using 59 PHA bins.
# Reduced chi-squared = 1.661 for 57 degrees of freedom
# Null hypothesis probability = 1.269237e-03
Photon flux (15-150 keV) in 50.87 sec: 0.160029 ( -0.0288211 0.0288239 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.23076e-07 ( -1.35969e-07 1.41727e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.41872 ( -6.10519 2.22455 )
Epeak [keV] : 46.7583 ( -8.6145 25.2201 )
Norm@50keV : 6.63229E-02 ( -0.0980565 347.811 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 88.53 using 59 PHA bins.
# Reduced chi-squared = 1.581 for 56 degrees of freedom
# Null hypothesis probability = 3.640812e-03
Photon flux (15-150 keV) in 50.87 sec: 0.144118 ( -0.029988 0.030035 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.46864e-07 ( -1.06238e-07 1.60915e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.82463 ( -4.28822 -4.82463 )
beta : -2.79292 ( -2.07237 0.817527 )
Epeak [keV] : 38.7321 ( -6.021 5.24897 )
Norm@50keV : 9.62877 ( -1.64654 22.8108 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 85.64 using 59 PHA bins.
# Reduced chi-squared = 1.557 for 55 degrees of freedom
# Null hypothesis probability = 5.111864e-03
Photon flux (15-150 keV) in 50.87 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 5.17445e-07 ( 0 0 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 1.81e-07
S(50-100 keV) = 2.47e-07
T90 vs. Hardness ratio plot
T90 = 43.067999958992 sec.
Hardness ratio (energy fluence ratio) = 1.36464
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 2.1813
Count Ratio (50-100 keV) / (15-25 keV) = 0.891891
Mask shadow pattern
IMX = -4.817493736064501E-02, IMY = 2.867311593975619E-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:
-33.195400 -32.868000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.3695 35.2131 3.7 33.5 115.1 -0.0550 -3.1 8.9 Her X-1
288.8816 11.0633 60.9 34.4 40.6 0.0027 0.2 8.6 GRS 1915+105
299.6323 35.3289 6.0 9.7 13.1 0.0178 1.9 7.9 Cyg X-1
308.3261 40.9349 6.4 9.2 -42.7 0.0165 1.8 9.8 Cyg X-3
326.2064 38.2821 7.2 22.8 -57.1 -0.0178 -1.6 2.9 Cyg X-2
313.3154 -8.7654 3.1 55.6 6.8 0.1672 3.7 ------ UNKNOWN
230.7802 73.4051 2.2 40.8 -176.9 0.0749 5.2 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-32.868000 18.004600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.3328 35.2545 2.8 33.6 115.0 11.4007 4.1 8.1 Her X-1
288.8137 10.9040 8.9 34.8 40.8 -2.8764 -1.3 2.7 GRS 1915+105
299.4690 35.1838 4.3 10.0 14.9 3.8080 2.7 6.0 Cyg X-1
307.9756 40.7894 8.7 9.1 -39.6 1.8840 1.3 11.5 Cyg X-3
325.9977 38.2015 28.3 22.6 -56.1 -0.7019 -0.4 10.9 Cyg X-2
320.8477 0.0471 2.0 49.7 -5.4 17.2701 5.7 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
34.504600 122.594000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.4918 35.1365 0.0 34.3 110.2 -2.2434 -1.4 12.5 Her X-1
288.8366 11.1138 0.0 37.8 40.6 2.2466 1.5 10.3 GRS 1915+105
299.5863 35.1758 29.0 13.1 19.5 0.2933 0.4 1.6 Cyg X-1
307.9835 40.9761 11.3 10.3 -22.9 0.7963 1.0 5.9 Cyg X-3
326.0015 38.1673 6.8 22.8 -48.1 1.4870 1.7 12.3 Cyg X-2
303.9667 42.0217 4.7 7.6 -11.7 1.8957 2.5 ------ UNKNOWN
216.8152 77.1968 3.0 41.4 -172.9 4.1953 3.9 ------ UNKNOWN
Plot creation:
Thu May 11 06:29:36 EDT 2017