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
244.7937 -15.9990 0.0051 28.2 -55.6 14.3382 37.9 TRIG_00868849
------------------------------------------
Foreground time interval of the image:
-16.799 45.870 (delta_t = 62.669 [sec])
47.000 221.540 (delta_t = 174.540 [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
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 88.000000
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 88.000000
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 88.000000
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
-49.564000 45.870000
47.000000 221.540000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 6.49459 ( -0.309458 0.311515 )
Norm@50keV : 1.03085E-04 ( -2.57241e-05 3.24197e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.44 using 59 PHA bins.
# Reduced chi-squared = 1.271 for 57 degrees of freedom
# Null hypothesis probability = 8.161100e-02
Photon flux (15-150 keV) in 270 sec: 0.700245 ( -0.0582565 0.0586928 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.55387e-06 ( -4.28433e-07 4.31017e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-49.564000 45.870000
47.000000 221.540000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 1.91735E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 544.39 using 59 PHA bins.
# Reduced chi-squared = 9.7212 for 56 degrees of freedom
# Null hypothesis probability = 3.451815e-81
Photon flux (15-150 keV) in 270 sec: 0.660677 ( -0.070635 0.068624 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.23417e-06 ( -5.11488e-07 4.9734e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-49.564000 45.870000
47.000000 221.540000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.50184 ( -3.20741 3.7064 )
beta : -10.0000 ( 10 10 )
Epeak [keV] : 9.29441 ( -0.877441 2.96074 )
Norm@50keV : 338.458 ( -338.414 121703 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.83 using 59 PHA bins.
# Reduced chi-squared = 0.9605 for 55 degrees of freedom
# Null hypothesis probability = 5.581279e-01
Photon flux (15-150 keV) in 270 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] : 2.50085 (-0.131428 0.144586)
R^2/D10^2 : 329.712 (-125.38 197.933)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.45 using 59 PHA bins.
# Reduced chi-squared = 0.9202 for 57 degrees of freedom
# Null hypothesis probability = 6.461904e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.895e-06 7.330e-07
25- 50 3.604e-07 6.384e-08
50-150 1.142e-10 6.580e-11
15-150 5.256e-06 7.519e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 4.19428 (-0.312503 0.357874)
Norm : 314.176 (-103.826 152.956)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.92 using 59 PHA bins.
# Reduced chi-squared = 0.9634 for 57 degrees of freedom
# Null hypothesis probability = 5.536890e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.999e-06 6.251e-07
25- 50 4.127e-07 7.709e-08
50-150 8.137e-10 4.471e-10
15-150 5.413e-06 6.574e-07
Double BB
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.45 using 59 PHA bins.
#Fit statistic : Chi-Squared = 52.32 using 59 PHA bins.
#Fit statistic : Chi-Squared = 52.29 using 59 PHA bins.
#Fit statistic : Chi-Squared = 52.28 using 59 PHA bins.
# Reduced chi-squared = 0.9537 for 55 degrees of freedom
# Reduced chi-squared = 0.9513 for 55 degrees of freedom
# Reduced chi-squared = 0.9507 for 55 degrees of freedom
# Reduced chi-squared = 0.9505 for 55 degrees of freedom
# Null hypothesis probability = 5.724792e-01
# Null hypothesis probability = 5.775294e-01
# Null hypothesis probability = 5.788406e-01
# Null hypothesis probability = 5.792334e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.895e-06 5.524e+01
25- 50 3.610e-07 4.784e+02
50-150 1.165e-10 9.335e+03
15-150 5.256e-06 1.179e+04
Peak spectrum fit
Power-law model
Time interval is from 47.592 sec. to 48.592 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 4.48078 ( -0.94386 1.22361 )
Norm@50keV : 1.08012E-03 ( -0.00108012 0.00155709 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.36 using 59 PHA bins.
# Reduced chi-squared = 0.9361 for 57 degrees of freedom
# Null hypothesis probability = 6.125943e-01
Photon flux (15-150 keV) in 1 sec: 1.02482 ( -0.25639 0.257585 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.44503e-08 ( -1.00757e-08 1.12947e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 47.592 sec. to 48.592 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 1.38922E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 81.90 using 59 PHA bins.
# Reduced chi-squared = 1.463 for 56 degrees of freedom
# Null hypothesis probability = 1.359880e-02
Photon flux (15-150 keV) in 1 sec: 1.02337 1.01551 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.06554e-15 ( 0 0 ) ergs/cm2
Band function
Time interval is from 47.592 sec. to 48.592 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.75910 ( 1.78083 1.78083 )
beta : -5.94403 ( 5.79078 14.5017 )
Epeak [keV] : 1.78747 ( -1.90943 4.1341 )
Norm@50keV : 0.210105 ( -0.211875 4.27814e+07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.95 using 59 PHA bins.
# Reduced chi-squared = 0.9627 for 55 degrees of freedom
# Null hypothesis probability = 5.533652e-01
Photon flux (15-150 keV) in 1 sec: 1.16856 ( 5.83144 -0.724514 ) 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] : 3.12123 (-0.671355 0.816323)
R^2/D10^2 : 113.246 (-113.246 424.981)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.96 using 59 PHA bins.
# Reduced chi-squared = 0.9291 for 57 degrees of freedom
# Null hypothesis probability = 6.273682e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.697e-08 1.527e-08
25- 50 4.504e-09 2.937e-09
50-150 9.943e-12 1.151e-11
15-150 3.148e-08 1.857e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 6.57377 (-2.1521 3.60191)
Norm : 97.4950 (-97.495 242.195)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.02 using 59 PHA bins.
# Reduced chi-squared = 0.9301 for 57 degrees of freedom
# Null hypothesis probability = 6.252182e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.614e-08 1.487e-08
25- 50 5.791e-09 3.725e-09
50-150 1.011e-10 1.206e-10
15-150 3.203e-08 1.861e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.02868 (-0.683252 0.80709)
R1^2/D10^2 : 133.115 (-133.128 569.69)
kT2 [keV] : 29.7889 (-29.7525 -29.7525)
R2^2/D10^2 : 2.20061E-03 (-0.00220615 0.154785)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.24 using 59 PHA bins.
# Reduced chi-squared = 0.9317 for 55 degrees of freedom
# Null hypothesis probability = 6.189952e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.670e-08 1.532e-08
25- 50 5.863e-09 3.152e-09
50-150 1.187e-08 8.900e-09
15-150 4.443e-08 2.374e-08
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: 6.46757 ( -0.31542 0.317427 )
Norm@50keV : 1.07358E-04 ( -2.73097e-05 3.46256e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.15 using 59 PHA bins.
# Reduced chi-squared = 1.266 for 57 degrees of freedom
# Null hypothesis probability = 8.519692e-02
Photon flux (15-150 keV) in 237.2 sec: 0.709403 ( -0.0595884 0.0600055 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.94844e-06 ( -3.85507e-07 3.87713e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 2.00331E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 527.18 using 59 PHA bins.
# Reduced chi-squared = 9.4139 for 56 degrees of freedom
# Null hypothesis probability = 7.938390e-78
Photon flux (15-150 keV) in 237.2 sec: 0.674161 ( -0.071727 0.069667 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.68892e-06 ( -4.56942e-07 4.44133e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.03321 ( -2.44074 1.79337 )
beta : -10.0000 ( 10 10 )
Epeak [keV] : 11.1494 ( -0.572055 0.956522 )
Norm@50keV : 6366.34 ( -2965.14 127200 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.68 using 59 PHA bins.
# Reduced chi-squared = 0.9760 for 55 degrees of freedom
# Null hypothesis probability = 5.252057e-01
Photon flux (15-150 keV) in 237.2 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) = 5.34e-07
S(50-100 keV) = 2.37e-08
T90 vs. Hardness ratio plot
T90 = 209.799999952316 sec.
Hardness ratio (energy fluence ratio) = 0.044382
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.0591442
Count Ratio (50-100 keV) / (15-25 keV) = -0.00805811
Mask shadow pattern
IMX = 3.029747333064975E-01, IMY = 4.426486533736473E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 88.000000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 88.000000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 88.000000
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:
-16.799410 45.870000
47.000000 221.540000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.3895 -60.7142 207.6 54.9 -166.9 0.0591 0.1 5.9 Cen X-3
186.5427 -62.7761 4.3 47.0 -166.8 -1.8341 -2.7 3.1 GX 301-2
244.8842 -15.5189 15.0 28.6 -55.0 -0.2901 -0.8 9.1 Sco X-1
256.0117 -38.0204 6.2 4.2 -69.8 0.5573 1.9 10.6 4U 1700-377
256.3563 -36.2264 3.9 5.5 -54.6 -0.8510 -2.9 12.4 GX 349+2
262.9306 -24.8498 13.4 16.4 -13.8 -0.2453 -0.9 7.6 GX 1+4
264.5445 -44.4009 14.8 4.8 112.5 0.2403 0.8 9.0 4U 1735-44
268.5018 -1.4352 7.2 40.3 -10.3 0.7097 1.6 8.1 SW J1753.5-0127
270.3319 -25.0052 245.9 18.2 8.1 -0.0141 -0.0 5.1 GX 5-1
270.2515 -25.7341 12.1 17.5 8.9 0.2872 1.0 2.8 GRS 1758-258
273.9896 -13.9926 4.6 29.7 4.9 -0.8780 -2.5 2.8 GX 17+2
275.7831 -30.2522 13.4 16.8 31.5 -0.2546 -0.9 10.1 H1820-303
284.8692 -25.0072 77.5 26.2 36.5 0.0597 0.1 10.5 HT1900.1-2455
263.2000 -33.7430 7.9 7.7 -2.7 -0.4297 -1.5 11.9 GX 354-0
296.8867 -16.2817 2.3 40.3 39.6 3.3179 5.0 ------ UNKNOWN
273.9447 10.3655 2.2 53.0 -6.2 3.4561 5.2 ------ UNKNOWN
211.1341 -41.8962 3.1 36.0 -131.7 1.7106 3.7 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
Plot creation:
Sat Oct 27 10:11:57 EDT 2018