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
40.1393 +61.2209 0.0144 40.1 -139.8 0.9516 13.4 TRIG_00894557
------------------------------------------
Foreground time interval of the image:
-0.568 8.777 (delta_t = 9.345 [sec])
Background time interval of the image:
-239.824 -117.685 (delta_t = 122.139 [sec])
-116.824 -0.568 (delta_t = 116.256 [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
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.128000
8 ms binning
From T100_start-3 s to T100_start+3 s
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.128000
2 ms binning
From T100_start-1 s to T100_start+1 s
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.128000
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 -0.568 sec. to 17.128 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.38389 ( -0.195306 0.210192 )
Norm@50keV : 4.31972E-03 ( -0.000684057 0.00067793 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.30 using 59 PHA bins.
# Reduced chi-squared = 1.058 for 57 degrees of freedom
# Null hypothesis probability = 3.574881e-01
Photon flux (15-150 keV) in 17.7 sec: 0.791786 ( -0.0857431 0.0857471 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.43103e-07 ( -9.47642e-08 9.70399e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.568 sec. to 17.128 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.240813 ( -1.64994 1.24244 )
Epeak [keV] : 30.4299 ( -5.6185 4.13376 )
Norm@50keV : 0.195972 ( -0.208217 2.18785 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.73 using 59 PHA bins.
# Reduced chi-squared = 0.7810 for 56 degrees of freedom
# Null hypothesis probability = 8.834021e-01
Photon flux (15-150 keV) in 17.7 sec: 0.759386 ( -0.085125 0.08537 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.43579e-07 ( -8.13386e-08 8.80911e-08 ) ergs/cm2
Band function
Time interval is from -0.568 sec. to 17.128 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.350944 ( -1.44545 2.22061 )
beta : -9.15965 ( 9.9957 19.9936 )
Epeak [keV] : 30.5744 ( -3.52348 3.99981 )
Norm@50keV : 0.230863 ( -0.230863 11.3821 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.73 using 59 PHA bins.
# Reduced chi-squared = 0.7952 for 55 degrees of freedom
# Null hypothesis probability = 8.627947e-01
Photon flux (15-150 keV) in 17.7 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] : 8.07815 (-0.797142 0.871415)
R^2/D10^2 : 0.886558 (-0.304098 0.467992)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.75 using 59 PHA bins.
# Reduced chi-squared = 0.8027 for 57 degrees of freedom
# Null hypothesis probability = 8.572805e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.865e-07 3.287e-08
25- 50 3.319e-07 4.788e-08
50-150 8.998e-08 2.875e-08
15-150 6.084e-07 8.558e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 35.7727 (-7.33553 9.93279)
Norm : 5.68608 (-1.04253 1.29925)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.48 using 59 PHA bins.
# Reduced chi-squared = 0.8506 for 57 degrees of freedom
# Null hypothesis probability = 7.817125e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.218e-07 3.089e-08
25- 50 2.774e-07 3.744e-08
50-150 1.891e-07 6.315e-08
15-150 6.883e-07 1.003e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.05401 (-5.05401 -5.05401)
R1^2/D10^2 : 2.30291 (-2.30291 -2.30291)
kT2 [keV] : 9.89823 (-9.89823 -9.89823)
R2^2/D10^2 : 0.282167 (-0.282167 0.8114)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.72 using 59 PHA bins.
# Reduced chi-squared = 0.7948 for 55 degrees of freedom
# Null hypothesis probability = 8.632275e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.028e-07 1.107e-07
25- 50 3.127e-07 1.668e-07
50-150 1.263e-07 6.862e-08
15-150 6.417e-07 3.384e-07
Peak spectrum fit
Power-law model
Time interval is from 2.804 sec. to 3.804 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.57583 ( -0.210006 0.231459 )
Norm@50keV : 1.79866E-02 ( -0.00325955 0.00321859 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 86.39 using 59 PHA bins.
# Reduced chi-squared = 1.516 for 57 degrees of freedom
# Null hypothesis probability = 7.236690e-03
Photon flux (15-150 keV) in 1 sec: 3.70415 ( -0.439224 0.439234 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.83782e-07 ( -2.5093e-08 2.5509e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 2.804 sec. to 3.804 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.08114 ( -2.87961 1.69172 )
Epeak [keV] : 28.4389 ( -3.02422 2.80636 )
Norm@50keV : 22.2047 ( -24.1601 1891.56 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.56 using 59 PHA bins.
# Reduced chi-squared = 1.153 for 56 degrees of freedom
# Null hypothesis probability = 2.024488e-01
Photon flux (15-150 keV) in 1 sec: 3.59666 ( -0.4337 0.43494 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.58688e-07 ( -1.9824e-08 2.0556e-08 ) ergs/cm2
Band function
Time interval is from 2.804 sec. to 3.804 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 2.57985 ( -1.38381 -1.61787 )
beta : -5.51079 ( 4.94426 1.39986 )
Epeak [keV] : 28.6244 ( -3.11199 2.79866 )
Norm@50keV : 48.0911 ( -48.0829 1045.39 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.18 using 59 PHA bins.
# Reduced chi-squared = 1.167 for 55 degrees of freedom
# Null hypothesis probability = 1.858103e-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] : 7.22254 (-0.668871 0.716036)
R^2/D10^2 : 6.82854 (-2.26585 3.43609)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.69 using 59 PHA bins.
# Reduced chi-squared = 1.135 for 57 degrees of freedom
# Null hypothesis probability = 2.261112e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.905e-08 1.100e-08
25- 50 8.585e-08 1.457e-08
50-150 1.591e-08 6.483e-09
15-150 1.608e-07 2.505e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 27.9642 (-5.59915 7.40848)
Norm : 33.0002 (-6.89984 8.85777)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.68 using 59 PHA bins.
# Reduced chi-squared = 1.328 for 57 degrees of freedom
# Null hypothesis probability = 4.958023e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.468e-08 8.935e-09
25- 50 7.101e-08 1.107e-08
50-150 3.539e-08 1.398e-08
15-150 1.711e-07 2.460e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 200.000 (-200 -200)
R1^2/D10^2 : 1.12114E-04 (-7.21762e-05 0.000272654)
kT2 [keV] : 7.03340 (-0.635944 0.699781)
R2^2/D10^2 : 7.48534 (-2.49417 3.80598)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.69 using 59 PHA bins.
#Fit statistic : Chi-Squared = 58.37 using 59 PHA bins.
# Reduced chi-squared = 1.176 for 55 degrees of freedom
# Reduced chi-squared = 1.061 for 55 degrees of freedom
# Null hypothesis probability = 1.743591e-01
# Null hypothesis probability = 3.525593e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.904e-08 1.247e+00
25- 50 8.586e-08 9.580e+00
50-150 1.592e-08 2.374e+02
15-150 1.608e-07 2.396e+02
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: 2.44478 ( -0.201691 0.217498 )
Norm@50keV : 5.55685E-03 ( -0.000942036 0.000938971 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 90.11 using 59 PHA bins.
# Reduced chi-squared = 1.581 for 57 degrees of freedom
# Null hypothesis probability = 3.400251e-03
Photon flux (15-150 keV) in 9.345 sec: 1.05574 ( -0.120487 0.120489 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.11799e-07 ( -6.86959e-08 7.04877e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.05752 ( -2.23394 1.43078 )
Epeak [keV] : 29.7390 ( -3.66117 3.29797 )
Norm@50keV : 1.03449 ( -1.41863 36.1561 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.82 using 59 PHA bins.
# Reduced chi-squared = 1.175 for 56 degrees of freedom
# Null hypothesis probability = 1.734753e-01
Photon flux (15-150 keV) in 9.345 sec: 1.02154 ( -0.118085 0.11831 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.39622e-07 ( -5.55775e-08 5.87333e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.24596 ( -0.91397 4.04533 )
beta : -10.0000 ( 10 10 )
Epeak [keV] : 29.9026 ( -3.68794 3.20334 )
Norm@50keV : 1.36921 ( -1.36979 36.0035 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.77 using 59 PHA bins.
# Reduced chi-squared = 1.196 for 55 degrees of freedom
# Null hypothesis probability = 1.517749e-01
Photon flux (15-150 keV) in 9.345 sec: ( ) 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) = 2.43e-07
S(50-100 keV) = 1.86e-07
T90 vs. Hardness ratio plot
T90 = 16.5639998912811 sec.
Hardness ratio (energy fluence ratio) = 0.765432
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.1011
Count Ratio (50-100 keV) / (15-25 keV) = 0.292593
Mask shadow pattern
IMX = -6.443540563718642E-01, IMY = 5.443169945274297E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.128000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.128000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.128000
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:
-239.824000 -117.684700
-116.824000 -0.568000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.2201 35.4370 0.0 39.6 31.7 -0.5205 -0.9 12.9 Her X-1
299.5714 35.2114 0.6 39.6 -27.5 7.8950 20.2 1.1 Cyg X-1
308.0346 40.9119 5.0 35.4 -40.2 0.9007 2.3 4.2 Cyg X-3
325.9139 38.3095 64.5 41.9 -60.1 0.1342 0.2 12.2 Cyg X-2
165.2184 54.6304 3.9 44.2 131.0 3.5848 3.0 ------ UNKNOWN
220.2717 49.8512 2.8 33.7 79.5 2.3548 4.1 ------ UNKNOWN
229.9572 51.2937 3.0 29.7 70.2 1.8709 3.9 ------ UNKNOWN
257.0894 25.3711 3.0 49.1 26.0 3.2004 3.8 ------ UNKNOWN
260.6096 19.7853 3.1 54.3 21.0 4.9793 3.7 ------ UNKNOWN
122.9910 50.7220 3.9 54.8 161.8 6.4591 3.5 ------ UNKNOWN
122.9729 50.8749 4.1 54.7 161.8 7.0539 3.8 ------ UNKNOWN
83.0072 52.5767 3.1 53.8 -167.9 3.0058 3.8 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-0.568000 8.776600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.6275 35.3498 3.1 39.6 31.2 -0.3070 -3.7 8.3 Her X-1
299.4355 35.1068 6.6 39.6 -27.3 -0.1157 -1.7 9.5 Cyg X-1
308.1652 40.8706 9.1 35.4 -40.3 -0.0784 -1.3 5.5 Cyg X-3
325.9889 38.2704 4.6 41.9 -60.2 0.3072 2.5 9.1 Cyg X-2
40.1393 61.2209 0.9 40.1 -139.8 0.9510 13.3 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
68.976590 717.376000
718.176000 962.266000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
83.6467 22.0146 0.9 49.3 171.3 31.2970 12.3 0.7 Crab
308.0878 41.0465 8.2 55.8 -17.1 -5.0064 -1.4 5.7 Cyg X-3
326.3386 38.3048 6.0 49.6 -33.4 4.5459 1.9 7.9 Cyg X-2
93.6694 20.5445 2.9 54.9 161.6 18.2177 3.9 ------ UNKNOWN
301.2106 65.8295 2.3 39.7 9.3 6.5724 4.9 ------ UNKNOWN
Plot creation:
Sun Mar 24 18:48:16 EDT 2019