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
272.1531 -20.4069 0.0119 36.6 -60.8 0.7659 16.2 TRIG_00866993
------------------------------------------
Foreground time interval of the image:
-0.196 2.044 (delta_t = 2.240 [sec])
Background time interval of the image:
-239.668 -0.196 (delta_t = 239.472 [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 0.064000
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 0.064000
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 0.064000
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 -0.196 sec. to 2.044 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.38209 ( -0.158589 0.167244 )
Norm@50keV : 1.71310E-02 ( -0.00216982 0.00214851 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 86.17 using 59 PHA bins.
# Reduced chi-squared = 1.512 for 57 degrees of freedom
# Null hypothesis probability = 7.567251e-03
Photon flux (15-150 keV) in 2.24 sec: 3.13678 ( -0.297336 0.297455 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.7281e-07 ( -3.92152e-08 3.96646e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.196 sec. to 2.044 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.387176 ( -1.26664 1.05666 )
Epeak [keV] : 31.2631 ( -4.10263 3.4319 )
Norm@50keV : 0.928690 ( -0.930257 5.07134 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.25 using 59 PHA bins.
# Reduced chi-squared = 1.076 for 56 degrees of freedom
# Null hypothesis probability = 3.246521e-01
Photon flux (15-150 keV) in 2.24 sec: 3.03461 ( -0.29635 0.29702 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.28646e-07 ( -3.45856e-08 3.62477e-08 ) ergs/cm2
Band function
Time interval is from -0.196 sec. to 2.044 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.411705 ( -1.30104 -0.624053 )
beta : -5.12406 ( 4.5413 1.63186 )
Epeak [keV] : 31.2037 ( -5.18993 3.53577 )
Norm@50keV : 0.969199 ( -0.9692 1075.07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.08 using 59 PHA bins.
# Reduced chi-squared = 1.092 for 55 degrees of freedom
# Null hypothesis probability = 2.969954e-01
Photon flux (15-150 keV) in 2.24 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.32297e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 8.27677 (-0.697291 0.745539)
R^2/D10^2 : 3.23368 (-0.974959 1.41311)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.19 using 59 PHA bins.
# Reduced chi-squared = 1.109 for 57 degrees of freedom
# Null hypothesis probability = 2.670307e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.192e-08 1.401e-08
25- 50 1.705e-07 1.876e-08
50-150 5.001e-08 1.308e-08
15-150 3.124e-07 3.282e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 36.4599 (-6.21855 7.98716)
Norm : 22.4463 (-3.56994 4.23234)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.19 using 59 PHA bins.
# Reduced chi-squared = 1.196 for 57 degrees of freedom
# Null hypothesis probability = 1.473000e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.117e-07 1.267e-08
25- 50 1.409e-07 1.427e-08
50-150 9.819e-08 2.788e-08
15-150 3.507e-07 3.707e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.54381 (-2.78768 -5.54381)
R1^2/D10^2 : 7.62755 (-6.26656 54.7558)
kT2 [keV] : 10.5837 (-5.14042 -10.5837)
R2^2/D10^2 : 0.771287 (-0.767796 1.36789)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.70 using 59 PHA bins.
# Reduced chi-squared = 1.085 for 55 degrees of freedom
# Null hypothesis probability = 3.089436e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.018e-07 5.570e-08
25- 50 1.593e-07 8.396e-08
50-150 6.950e-08 3.931e-08
15-150 3.306e-07 1.717e-07
Peak spectrum fit
Power-law model
Time interval is from -0.176 sec. to 0.824 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.54630 ( -0.18133 0.195131 )
Norm@50keV : 2.33215E-02 ( -0.00350575 0.00346993 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.28 using 59 PHA bins.
# Reduced chi-squared = 0.9522 for 57 degrees of freedom
# Null hypothesis probability = 5.778820e-01
Photon flux (15-150 keV) in 1 sec: 4.71450 ( -0.494591 0.49474 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.36232e-07 ( -2.75116e-08 2.78662e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.176 sec. to 0.824 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.132582 ( -1.3316 1.08921 )
Epeak [keV] : 28.1658 ( -7.36923 4.41173 )
Norm@50keV : 0.759023 ( -0.758722 4.61059 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 36.55 using 59 PHA bins.
# Reduced chi-squared = 0.6528 for 56 degrees of freedom
# Null hypothesis probability = 9.794379e-01
Photon flux (15-150 keV) in 1 sec: 4.59946 ( -0.49575 0.4961 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.15886e-07 ( -2.4967e-08 2.6082e-08 ) ergs/cm2
Band function
Time interval is from -0.176 sec. to 0.824 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.151426 ( -1.06583 1.42493 )
beta : -6.10128 ( 6.04445 2.73595 )
Epeak [keV] : 28.1034 ( -7.21397 3.83726 )
Norm@50keV : 0.739694 ( -0.236454 5.71524 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 36.53 using 59 PHA bins.
# Reduced chi-squared = 0.6642 for 55 degrees of freedom
# Null hypothesis probability = 9.740203e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.27936e-07 ( -2.27929e-07 -2.8371e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.92086 (-0.773755 0.821536)
R^2/D10^2 : 5.67390 (-1.92574 3.03135)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.18 using 59 PHA bins.
# Reduced chi-squared = 0.7224 for 57 degrees of freedom
# Null hypothesis probability = 9.432492e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.389e-08 1.027e-08
25- 50 1.099e-07 1.457e-08
50-150 2.793e-08 8.910e-09
15-150 2.017e-07 2.700e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 31.6605 (-5.72114 7.27042)
Norm : 37.4811 (-6.80224 8.43822)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.95 using 59 PHA bins.
# Reduced chi-squared = 0.7009 for 57 degrees of freedom
# Null hypothesis probability = 9.579152e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.833e-08 1.002e-08
25- 50 9.215e-08 1.207e-08
50-150 5.410e-08 1.763e-08
15-150 2.246e-07 2.765e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.12414 (-1.82479 2.22055)
R1^2/D10^2 : 35.1612 (-28.2929 468.549)
kT2 [keV] : 9.63616 (-1.59868 4.8472)
R2^2/D10^2 : 1.96491 (-1.81828 3.08748)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 35.80 using 59 PHA bins.
# Reduced chi-squared = 0.6509 for 55 degrees of freedom
# Null hypothesis probability = 9.791021e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.366e-08 3.805e-08
25- 50 1.010e-07 5.280e-08
50-150 4.067e-08 2.428e-08
15-150 2.153e-07 1.088e-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: 2.38209 ( -0.158589 0.167244 )
Norm@50keV : 1.71310E-02 ( -0.00216982 0.00214851 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 86.17 using 59 PHA bins.
# Reduced chi-squared = 1.512 for 57 degrees of freedom
# Null hypothesis probability = 7.567251e-03
Photon flux (15-150 keV) in 2.24 sec: 3.13678 ( -0.297336 0.297455 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.7281e-07 ( -3.92152e-08 3.96646e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.387176 ( -1.26664 1.05666 )
Epeak [keV] : 31.2631 ( -4.10263 3.4319 )
Norm@50keV : 0.928690 ( -0.930257 5.07134 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.25 using 59 PHA bins.
# Reduced chi-squared = 1.076 for 56 degrees of freedom
# Null hypothesis probability = 3.246521e-01
Photon flux (15-150 keV) in 2.24 sec: 3.03461 ( -0.29635 0.29702 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.28646e-07 ( -3.45856e-08 3.62477e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.411705 ( -1.30104 -0.624053 )
beta : -5.12406 ( 4.5413 1.63186 )
Epeak [keV] : 31.2037 ( -5.18993 3.53577 )
Norm@50keV : 0.969199 ( -0.9692 1075.33 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.08 using 59 PHA bins.
# Reduced chi-squared = 1.092 for 55 degrees of freedom
# Null hypothesis probability = 2.969954e-01
Photon flux (15-150 keV) in 2.24 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.32297e-07 ( 0 0 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 1.22e-07
S(50-100 keV) = 9.36e-08
T90 vs. Hardness ratio plot
T90 = 1.90400004386902 sec.
Hardness ratio (energy fluence ratio) = 0.767213
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.04237
Count Ratio (50-100 keV) / (15-25 keV) = 0.248729
Mask shadow pattern
IMX = 3.629490446022527E-01, IMY = 6.481876366556062E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.064000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.064000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.064000
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:
-239.668000 -0.196000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
264.7270 -44.5694 5.9 38.4 -102.2 1.3567 2.0 7.2 4U 1735-44
268.2515 -1.5174 6.2 50.3 -40.8 -1.6774 -1.9 8.0 SW J1753.5-0127
270.1154 -25.2201 0.0 36.5 -69.4 0.7951 1.7 12.5 GX 5-1
270.3060 -25.7940 6.8 36.2 -70.3 0.7993 1.7 3.1 GRS 1758-258
274.0808 -14.0113 7.1 38.2 -50.1 0.6352 1.6 4.6 GX 17+2
275.9180 -30.2361 7.0 30.2 -75.8 0.5335 1.7 7.9 H1820-303
285.0851 -24.7714 9.0 23.9 -59.1 -0.3596 -1.3 9.3 HT1900.1-2455
288.8215 11.0085 3.0 47.5 -9.0 1.5526 3.8 4.0 GRS 1915+105
262.8651 -33.7913 3.8 40.5 -85.3 2.9651 3.0 6.7 GX 354-0
20.9122 -51.4994 2.2 53.7 155.1 6.9168 5.2 ------ UNKNOWN
4.4204 -44.9577 2.8 43.1 145.5 2.6226 4.1 ------ UNKNOWN
8.9478 -50.2501 3.1 46.2 153.0 2.3445 3.8 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-0.196000 2.044000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
264.6873 -44.3265 6.0 38.4 -101.8 -0.1560 -1.9 7.8 4U 1735-44
268.3692 -1.3159 8.6 50.4 -40.5 0.1399 1.3 8.2 SW J1753.5-0127
270.4321 -25.1909 12.2 36.3 -69.2 -0.0480 -0.9 10.5 GX 5-1
270.4672 -25.7124 13.1 36.1 -70.0 0.0454 0.9 9.1 GRS 1758-258
274.1478 -14.1394 0.0 38.0 -50.2 0.0928 2.3 10.3 GX 17+2
275.7967 -30.5079 3.8 30.3 -76.3 0.1110 3.0 10.7 H1820-303
284.8725 -24.9164 5.5 24.1 -59.7 -0.0500 -2.1 8.9 HT1900.1-2455
288.9177 10.8957 5.3 47.3 -9.0 0.0773 2.2 7.6 GRS 1915+105
263.0342 -33.9524 94.9 40.3 -85.6 -0.0122 -0.1 7.4 GX 354-0
319.4872 -0.4713 2.3 31.8 37.3 0.1336 4.9 ------ UNKNOWN
298.8516 -8.2922 2.6 25.8 -7.7 0.0845 4.3 ------ UNKNOWN
272.1531 -20.4069 0.7 36.6 -60.8 0.7658 16.2 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
210.832600 783.532570
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
330.8829 -28.1535 2.7 45.8 30.8 4.5410 4.4 ------ UNKNOWN
304.5087 -37.1638 2.4 52.1 0.1 4.9366 4.9 ------ UNKNOWN
287.1591 -38.7019 2.9 59.4 -14.0 10.7718 4.0 ------ UNKNOWN
91.7340 -64.5039 3.1 32.3 -128.3 2.2087 3.8 ------ UNKNOWN
256.5494 -67.6521 3.2 47.2 -53.4 7.3562 3.6 ------ UNKNOWN
Plot creation:
Mon Oct 15 08:22:12 EDT 2018