Estimated redshift from machine learning (Ukwatta et al. 2016) - may take a few minute to calcaulte
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
212.5609 35.2539 0.0094 48.5950 143.7816 19.1008849 20.410 TRIG_00881709
Foreground time interval of the image:
-10.432 16.176 (delta_t = 26.608 [sec])
Background time interval of the image:
-239.376 -10.432 (delta_t = 228.944 [sec])
Lightcurves
Notes:
- 1) The mask-weighted light curves are using the flight position.
- 2) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 3) 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.
- 4) 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.
- 5) 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)
Quad-rate summed light curves (from T0-300s to T0+1000s)
Spectral Evolution
Spectra
Notes:
- 1) The fitting includes the systematic errors.
- 2) When the burst includes telescope slew time periods, the fitting uses an average response file made from multiple 5-s response files through out the slew time plus single time preiod for the non-slew times, and weighted by the total counts in the corresponding time period using addrmf. An average response file is needed becuase a spectral fit using 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.
Time averaged spectrum fit using the average DRM
Power-law model
Time interval is from -10.432 sec. to 16.176 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.62959 ( -0.0647583 0.0650154 )
Norm@50keV : 4.96319E-02 ( -0.00186147 0.00186076 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.91 using 59 PHA bins.
# Reduced chi-squared = 1.314 for 57 degrees of freedom
# Null hypothesis probability = 5.599662e-02
Photon flux (15-150 keV) in 26.61 sec: 6.43801 ( -0.26319 0.264 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.2311e-05 ( -4.78309e-07 4.78796e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -10.432 sec. to 16.176 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.992416 ( -0.296062 0.277909 )
Epeak [keV] : 84.9884 ( -11.8793 25.2435 )
Norm@50keV : 9.91097E-02 ( -0.0252581 0.0365017 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.41 using 59 PHA bins.
# Reduced chi-squared = 1.043 for 56 degrees of freedom
# Null hypothesis probability = 3.869927e-01
Photon flux (15-150 keV) in 26.61 sec: 6.19589 ( -0.27966 0.28085 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.19145e-05 ( -5.13943e-07 5.12777e-07 ) ergs/cm2
Band function
Time interval is from -10.432 sec. to 16.176 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : ( )
beta : ( )
Epeak [keV] : ( )
Norm@50keV : ( )
------------------------------------------------------------
Photon flux (15-150 keV) in 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] : 15.4671 ( )
R^2/D10^2 : 0.633978 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 178.12 using 59 PHA bins.
# Reduced chi-squared = 3.1249 for 57 degrees of freedom
# Null hypothesis probability = 2.170501e-14
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.404e-07 6.293e-08
25- 50 3.433e-06 1.743e-07
50-150 5.664e-06 3.792e-07
15-150 9.937e-06 4.351e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 169.901 (-27.5827 -169.901)
Norm : 26.3076 (-1.16232 1.24425)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.09 using 59 PHA bins.
# Reduced chi-squared = 1.072 for 57 degrees of freedom
# Null hypothesis probability = 3.312694e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.777e-06 1.168e-07
25- 50 3.350e-06 2.555e-07
50-150 6.946e-06 1.748e-06
15-150 1.207e-05 1.952e-06
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.49371 (-1.12974 1.23254)
R1^2/D10^2 : 4.95772 (-1.88119 3.62809)
kT2 [keV] : 24.2201 (-2.7964 4.07309)
R2^2/D10^2 : 9.58168E-02 (-0.044501 0.0626539)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.85 using 59 PHA bins.
# Reduced chi-squared = 1.106 for 55 degrees of freedom
# Null hypothesis probability = 2.736144e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.535e-06 2.370e-07
25- 50 3.453e-06 3.313e-07
50-150 6.854e-06 9.194e-07
15-150 1.184e-05 1.251e-06
Peak spectrum fit
Power-law model
Time interval is from 0.596 sec. to 1.596 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.41128 ( -0.142398 0.144585 )
Norm@50keV : 0.133474 ( -0.0123802 0.0123628 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.27 using 59 PHA bins.
# Reduced chi-squared = 1.250 for 57 degrees of freedom
# Null hypothesis probability = 9.679020e-02
Photon flux (15-150 keV) in 1 sec: 0.329948 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.28695e-06 ( -1.29106e-07 1.29496e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.596 sec. to 1.596 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.581363 ( -0.693857 0.599014 )
Epeak [keV] : 91.9278 ( -21.5056 95.2032 )
Norm@50keV : 0.335973 ( -0.160584 0.37792 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.41 using 59 PHA bins.
# Reduced chi-squared = 1.168 for 56 degrees of freedom
# Null hypothesis probability = 1.824458e-01
Photon flux (15-150 keV) in 1 sec: 16.0037 ( -1.549 1.5506 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.25849e-06 ( -1.36291e-07 1.3518e-07 ) ergs/cm2
Band function
Time interval is from 0.596 sec. to 1.596 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : ( )
beta : ( )
Epeak [keV] : ( )
Norm@50keV : ( )
------------------------------------------------------------
Photon flux (15-150 keV) in 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] : 16.4846 (-1.75801 1.96547)
R^2/D10^2 : 1.44527 (-0.4648 0.678162)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 83.03 using 59 PHA bins.
# Reduced chi-squared = 1.457 for 57 degrees of freedom
# Null hypothesis probability = 1.381011e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.063e-08 1.325e-08
25- 50 3.479e-07 4.365e-08
50-150 6.682e-07 1.174e-07
15-150 1.097e-06 1.322e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-37.64 -200)
Norm : 67.9616 (-6.24081 6.24081)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.96 using 59 PHA bins.
# Reduced chi-squared = 1.245 for 57 degrees of freedom
# Null hypothesis probability = 1.011595e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.692e-07 2.045e-08
25- 50 3.255e-07 8.345e-08
50-150 7.139e-07 3.161e-07
15-150 1.209e-06 3.660e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.69855 (-2.69523 3.17274)
R1^2/D10^2 : 7.31415 (-4.1348 10.6601)
kT2 [keV] : 27.4657 (-6.73449 19.6443)
R2^2/D10^2 : 0.178100 (-0.152428 0.210884)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.38 using 59 PHA bins.
# Reduced chi-squared = 1.171 for 55 degrees of freedom
# Null hypothesis probability = 1.811690e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.279e-07 5.535e-08
25- 50 3.445e-07 1.551e-07
50-150 7.947e-07 3.955e-07
15-150 1.267e-06 5.575e-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: 1.62959 ( -0.0647583 0.0650154 )
Norm@50keV : 4.96319E-02 ( -0.00186147 0.00186076 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.91 using 59 PHA bins.
# Reduced chi-squared = 1.314 for 57 degrees of freedom
# Null hypothesis probability = 5.599662e-02
Photon flux (15-150 keV) in 26.61 sec: 6.43778 ( -0.263161 0.26397 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.23091e-05 ( -4.78094e-07 4.79124e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.992417 ( -0.296062 0.277908 )
Epeak [keV] : 84.9884 ( -11.8793 25.2435 )
Norm@50keV : 9.91096E-02 ( -0.025258 0.0365017 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.41 using 59 PHA bins.
# Reduced chi-squared = 1.043 for 56 degrees of freedom
# Null hypothesis probability = 3.869927e-01
Photon flux (15-150 keV) in 26.61 sec: 6.19514 ( -0.27956 0.28073 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.19188e-05 ( -5.15223e-07 5.13014e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : ( )
beta : ( )
Epeak [keV] : ( )
Norm@50keV : ( )
------------------------------------------------------------
Photon flux (15-150 keV) in 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) = 3.25e-06
S(50-100 keV) = 4.18e-06
T90 vs. Hardness ratio plot
T90 = 19.5199999809265 sec.
Hardness ratio (energy fluence ratio) = 1.28615
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.5564
Count Ratio (50-100 keV) / (15-25 keV) = 1.25337
Mask shadow pattern
IMX = -9.149408666892626E-01, IMY = -6.700877383759765E-01
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:
-239.376000 -10.432000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9688 -15.6495 0.4 17.7 -93.9 8.3201 27.4 0.8 Sco X-1
254.4111 35.3644 4.8 53.2 -172.5 1.8549 2.4 2.6 Her X-1
255.9537 -37.9719 62.5 37.0 -59.0 -0.0842 -0.2 7.8 4U 1700-377
256.4864 -36.2966 13.6 36.3 -61.7 0.4157 0.8 8.0 GX 349+2
263.0381 -24.7972 4.9 36.4 -83.4 1.3836 2.4 3.5 GX 1+4
264.7427 -44.4464 56.9 46.1 -57.1 0.2305 0.2 0.2 4U 1735-44
268.2151 -1.5209 0.0 41.7 -120.7 -0.4356 -0.6 10.0 SW J1753.5-0127
263.0922 -33.8895 10.7 39.7 -69.6 0.7715 1.1 6.1 GX 354-0
247.8508 -47.8162 1.7 40.4 -41.4 2.8313 6.7 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-10.432000 16.176000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.7946 -15.7181 14.8 17.6 -93.6 0.0791 0.8 11.7 Sco X-1
254.3396 35.3187 8.1 53.2 -172.5 -0.5898 -1.4 6.0 Her X-1
255.8090 -37.8169 29.1 36.8 -59.1 -0.0574 -0.4 8.6 4U 1700-377
256.2443 -36.5028 59.6 36.3 -61.2 0.0279 0.2 10.4 GX 349+2
263.0836 -24.8760 4.7 36.5 -83.3 -0.4382 -2.4 8.8 GX 1+4
264.8413 -44.4441 9.3 46.2 -57.2 -0.4224 -1.2 4.2 4U 1735-44
268.3645 -1.3746 5.8 41.9 -120.8 -0.4476 -2.0 4.7 SW J1753.5-0127
262.8331 -33.7540 3.0 39.4 -69.6 0.8569 3.8 9.2 GX 354-0
212.5609 35.2539 0.6 48.6 143.8 19.0855 19.9 ------ UNKNOWN
232.6764 8.8602 2.5 20.8 174.9 0.4841 4.6 ------ UNKNOWN
251.4604 37.0044 2.9 53.4 -176.1 1.9245 4.0 ------ UNKNOWN
228.0262 -44.5381 2.4 33.3 -21.0 0.5227 4.9 ------ UNKNOWN
268.2604 3.8103 2.4 43.4 -128.1 0.9440 4.9 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
82.124600 879.924600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.5101 35.3745 2.5 34.0 -131.4 4.0061 4.7 3.2 Her X-1
181.4229 48.3333 3.4 26.4 100.6 3.1227 3.4 ------ UNKNOWN
295.3801 63.7254 2.4 55.8 -176.6 11.0465 4.8 ------ UNKNOWN
272.0972 41.4374 2.9 46.2 -145.1 5.3102 3.9 ------ UNKNOWN
Plot creation:
Thu Mar 21 14:35:14 EDT 2019