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
229.7111 -57.3288 0.0235 29.3 -157.3 0.8057 8.2 TRIG_01218701
------------------------------------------
Foreground time interval of the image:
0.000 32.000 (delta_t = 32.000 [sec])
32.000 53.790 (delta_t = 21.790 [sec])
55.000 56.190 (delta_t = 1.190 [sec])
61.000 64.000 (delta_t = 3.000 [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
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
Multiple GTIs in the spectrum
tstart tstop
0.000000 32.000000
32.000000 53.790000
55.000000 56.190000
61.000000 64.000000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.57936 ( -0.372339 0.433218 )
Norm@50keV : 5.03589E-04 ( -0.000158375 0.000160356 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.26 using 59 PHA bins.
# Reduced chi-squared = 0.9870 for 57 degrees of freedom
# Null hypothesis probability = 5.027553e-01
Photon flux (15-150 keV) in 57.98 sec: 0.103941 ( -0.0180529 0.0180625 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.98653e-07 ( -6.58119e-08 7.01726e-08 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
0.000000 32.000000
32.000000 53.790000
55.000000 56.190000
61.000000 64.000000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.16899 ( -2.87207 0.829449 )
Epeak [keV] : 18.4398 ( )
Norm@50keV : 4.60253E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.39 using 59 PHA bins.
# Reduced chi-squared = 0.9891 for 56 degrees of freedom
# Null hypothesis probability = 4.979515e-01
Photon flux (15-150 keV) in 57.98 sec: 0.100737 ( -0.0179099 0.017508 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.60095e-07 ( -5.77904e-08 9.55047e-08 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
0.000000 32.000000
32.000000 53.790000
55.000000 56.190000
61.000000 64.000000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.32221 ( 1.32249 1.32249 )
beta : -3.50903 ( 3.52489 1.22987 )
Epeak [keV] : 17.0656 ( -16.9988 9.17675 )
Norm@50keV : 3.57532E-03 ( -0.0017891 312.635 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.11 using 59 PHA bins.
# Reduced chi-squared = 1.002 for 55 degrees of freedom
# Null hypothesis probability = 4.704750e-01
Photon flux (15-150 keV) in 57.98 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] : 6.72541 (-1.20427 1.36594)
R^2/D10^2 : 0.234819 (-0.12731 0.309771)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.07 using 59 PHA bins.
# Reduced chi-squared = 1.019 for 57 degrees of freedom
# Null hypothesis probability = 4.354932e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.472e-08 2.977e-08
25- 50 1.199e-07 4.223e-08
50-150 1.715e-08 1.024e-08
15-150 2.318e-07 6.126e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 26.4657 (-8.65956 14.8996)
Norm : 0.937044 (-0.310276 0.509087)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.031e-07 2.421e-08
25- 50 1.095e-07 3.027e-08
50-150 5.056e-08 3.166e-08
15-150 2.632e-07 7.300e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.16688 (-2.9477 -3.19797)
R1^2/D10^2 : 3.24141 (-3.0722 -3.18513)
kT2 [keV] : 8.60992 (-2.3141 -8.63544)
R2^2/D10^2 : 6.50741E-02 (-0.0637377 0.227688)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.019e-07 5.120e-08
25- 50 1.138e-07 6.227e-08
50-150 3.501e-08 2.399e-08
15-150 2.507e-07 1.303e-07
Peak spectrum fit
Power-law model
Time interval is from 61.000 sec. to 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.57936 ( -0.372339 0.433218 )
Norm@50keV : 5.03589E-04 ( -0.000158375 0.000160356 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.26 using 59 PHA bins.
# Reduced chi-squared = 0.9870 for 57 degrees of freedom
# Null hypothesis probability = 5.027553e-01
Photon flux (15-150 keV) in 57.98 sec: 0.103941 ( -0.0180529 0.0180625 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.98653e-07 ( -6.58119e-08 7.01726e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 61.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.16899 ( -2.87207 0.829449 )
Epeak [keV] : 18.4398 ( )
Norm@50keV : 4.60253E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.39 using 59 PHA bins.
# Reduced chi-squared = 0.9891 for 56 degrees of freedom
# Null hypothesis probability = 4.979515e-01
Photon flux (15-150 keV) in 57.98 sec: 0.100737 ( -0.0179099 0.017508 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.60095e-07 ( -5.77904e-08 9.55047e-08 ) ergs/cm2
Band function
Time interval is from 61.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.32221 ( 1.32249 1.32249 )
beta : -3.50903 ( 3.52489 1.22987 )
Epeak [keV] : 17.0656 ( -16.9988 9.17675 )
Norm@50keV : 3.57532E-03 ( -0.0017891 312.637 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.11 using 59 PHA bins.
# Reduced chi-squared = 1.002 for 55 degrees of freedom
# Null hypothesis probability = 4.704750e-01
Photon flux (15-150 keV) in 57.98 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 6.72541 (-1.20427 1.36594)
R^2/D10^2 : 0.234819 (-0.12731 0.309771)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.472e-08 2.850e-08
25- 50 1.199e-07 4.236e-08
50-150 1.715e-08 1.088e-08
15-150 2.318e-07 6.444e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 26.4657 (-8.65956 14.8996)
Norm : 0.937044 (-0.310276 0.509087)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.031e-07 2.438e-08
25- 50 1.095e-07 2.951e-08
50-150 5.056e-08 3.040e-08
15-150 2.632e-07 7.627e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.16688 (-3.19699 -3.19797)
R1^2/D10^2 : 3.24141 (-3.0722 -3.18513)
kT2 [keV] : 8.60992 (-2.3141 -8.63544)
R2^2/D10^2 : 6.50741E-02 (-0.0637377 0.227688)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.019e-07 5.210e-08
25- 50 1.138e-07 6.181e-08
50-150 3.501e-08 2.498e-08
15-150 2.507e-07 1.325e-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: 2.57936 ( -0.372339 0.433218 )
Norm@50keV : 5.03589E-04 ( -0.000158375 0.000160356 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.26 using 59 PHA bins.
# Reduced chi-squared = 0.9870 for 57 degrees of freedom
# Null hypothesis probability = 5.027553e-01
Photon flux (15-150 keV) in 57.98 sec: 0.103941 ( -0.0180529 0.0180625 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.98653e-07 ( -6.58119e-08 7.01726e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.16899 ( -2.87207 0.829449 )
Epeak [keV] : 18.4398 ( )
Norm@50keV : 4.60253E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.39 using 59 PHA bins.
# Reduced chi-squared = 0.9891 for 56 degrees of freedom
# Null hypothesis probability = 4.979515e-01
Photon flux (15-150 keV) in 57.98 sec: 0.100737 ( -0.0179099 0.017507 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.60095e-07 ( -5.77904e-08 9.55047e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.32221 ( 1.32249 1.32249 )
beta : -3.50903 ( 3.52489 1.22987 )
Epeak [keV] : 17.0656 ( -16.9988 9.17675 )
Norm@50keV : 3.57532E-03 ( -0.0017891 312.608 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.11 using 59 PHA bins.
# Reduced chi-squared = 1.002 for 55 degrees of freedom
# Null hypothesis probability = 4.704750e-01
Photon flux (15-150 keV) in 57.98 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) = 9.97e-08
S(50-100 keV) = 6.68e-08
T90 vs. Hardness ratio plot
T90 = 64 sec.
Hardness ratio (energy fluence ratio) = 0.67001
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.8384
Count Ratio (50-100 keV) / (15-25 keV) = 0.112405
Mask shadow pattern
IMX = -5.179702671674051E-01, IMY = 2.165537824673080E-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:
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
0.000000 32.000000
32.000000 53.790000
55.000000 56.190000
61.000000 64.000000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.4826 -40.6858 6.9 29.8 34.0 0.1757 1.7 8.1 Vela X-1
169.9905 -60.5000 3.6 1.5 90.1 0.2693 3.2 12.1 Cen X-3
186.5789 -62.7990 1.1 7.6 -162.4 0.8068 10.2 2.7 GX 301-2
255.9551 -37.8729 11.4 55.3 -158.8 -0.3712 -1.0 2.3 4U 1700-377
256.5114 -36.4914 9.4 56.7 -159.3 -0.4874 -1.2 5.5 GX 349+2
264.9087 -44.6209 3.7 53.6 -147.3 1.2329 3.1 12.5 4U 1735-44
203.6859 -29.7765 2.4 38.9 144.1 0.7904 4.8 ------ UNKNOWN
95.6489 -29.8467 2.4 56.8 2.4 2.2876 4.9 ------ UNKNOWN
161.9623 -62.2822 2.2 3.9 -3.1 0.4330 5.3 ------ UNKNOWN
229.7109 -57.3289 1.4 29.3 -157.3 0.8059 8.2 ------ UNKNOWN
257.1731 -59.8169 2.6 39.1 -138.2 0.6071 4.4 ------ UNKNOWN
65.4781 -65.9628 2.3 40.7 -48.4 0.8706 5.1 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
140.900620 148.400000
151.000000 151.630000
183.000000 190.230000
191.000000 191.020000
193.000000 199.110000
200.000000 200.060000
204.000000 214.043800
216.000000 230.870000
232.000000 243.052900
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.3966 -60.4947 5.9 29.7 33.1 0.3818 1.9 8.1 Cen X-3
186.6727 -62.7709 1.0 21.7 32.1 1.7458 11.2 0.4 GX 301-2
244.9374 -15.6429 1.4 43.3 176.1 2.2303 8.5 2.4 Sco X-1
255.9110 -37.8044 2.6 26.0 -153.0 0.6453 4.5 4.3 4U 1700-377
256.6127 -36.2951 0.0 27.6 -153.7 0.2876 1.8 11.5 GX 349+2
263.1022 -24.7648 6.8 40.4 -155.1 0.3785 1.7 5.2 GX 1+4
264.5403 -44.4481 5.1 25.1 -131.5 0.3584 2.3 8.7 4U 1735-44
270.2338 -25.0684 2.5 43.3 -146.4 1.2439 4.6 2.8 GX 5-1
270.1277 -25.5908 4.4 42.8 -146.2 -0.6782 -2.6 13.1 GRS 1758-258
274.0597 -14.1424 9.7 54.6 -149.3 0.7479 1.2 7.1 GX 17+2
276.0038 -30.3931 3.3 41.6 -135.8 0.9496 3.5 4.4 H1820-303
262.8690 -33.8898 4.4 32.4 -147.7 0.4913 2.6 6.8 GX 354-0
229.8457 -57.3753 1.9 0.1 -105.6 0.8711 6.2 ------ UNKNOWN
35.5355 -66.9836 1.9 55.2 -32.3 4.6513 6.1 ------ UNKNOWN
Plot creation:
Tue Mar 5 19:49:01 EST 2024