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
228.5111 -57.0038 0.0221 21.7 -151.3 1.2103 8.7 TRIG_01218505
------------------------------------------
Foreground time interval of the image:
0.000 64.000 (delta_t = 64.000 [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
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.59555 ( -0.290513 0.327861 )
Norm@50keV : 7.40431E-04 ( -0.000181392 0.000183219 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.34 using 59 PHA bins.
# Reduced chi-squared = 0.8656 for 57 degrees of freedom
# Null hypothesis probability = 7.545883e-01
Photon flux (15-150 keV) in 64 sec: 0.154405 ( -0.0208875 0.0208969 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.87103e-07 ( -8.33696e-08 8.78662e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.51011 ( -1.8748 0.495096 )
Epeak [keV] : 14.9564 ( )
Norm@50keV : 3.87123E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.32 using 59 PHA bins.
# Reduced chi-squared = 0.8450 for 56 degrees of freedom
# Null hypothesis probability = 7.889983e-01
Photon flux (15-150 keV) in 64 sec: 0.150904 ( -0.020846 0.021034 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.41583e-07 ( -8.0905e-08 9.83917e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.51120 ( -3.34157 1.61628 )
beta : -10.0000 ( 10 2.84217e-14 )
Epeak [keV] : 14.9936 ( -9.31432 12.7246 )
Norm@50keV : 3.85046E-03 ( -0.0024367 0.0733776 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.32 using 59 PHA bins.
# Reduced chi-squared = 0.8604 for 55 degrees of freedom
# Null hypothesis probability = 7.595918e-01
Photon flux (15-150 keV) in 64 sec: 0.146905 ( 6.85309 -0.021095 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.40886e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 6.55979 (-0.969574 1.12343)
R^2/D10^2 : 0.382735 (-0.186041 0.376918)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.49 using 59 PHA bins.
# Reduced chi-squared = 0.9385 for 57 degrees of freedom
# Null hypothesis probability = 6.074731e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.575e-07 3.958e-08
25- 50 1.895e-07 4.189e-08
50-150 2.469e-08 1.332e-08
15-150 3.717e-07 7.450e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 27.5168 (-7.533 11.3099)
Norm : 1.34391 (-0.357719 0.537251)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.670e-07 2.858e-08
25- 50 1.816e-07 3.962e-08
50-150 8.855e-08 4.632e-08
15-150 4.372e-07 8.528e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.42053 (-2.03841 1.68848)
R1^2/D10^2 : 1.48475 (-1.04026 21.7306)
kT2 [keV] : 12.1078 (-9.72368 12.4439)
R2^2/D10^2 : 1.71481E-02 (-0.0164626 0.0936553)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.715e-07 9.139e-08
25- 50 1.737e-07 8.858e-08
50-150 9.744e-08 6.134e-08
15-150 4.426e-07 2.255e-07
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.59555 ( -0.290513 0.327861 )
Norm@50keV : 7.40431E-04 ( -0.000181392 0.000183219 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.34 using 59 PHA bins.
# Reduced chi-squared = 0.8656 for 57 degrees of freedom
# Null hypothesis probability = 7.545883e-01
Photon flux (15-150 keV) in 64 sec: 0.154405 ( -0.0208875 0.0208969 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.87103e-07 ( -8.33696e-08 8.78662e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.51011 ( -1.8748 0.495096 )
Epeak [keV] : 14.9564 ( )
Norm@50keV : 3.87123E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.32 using 59 PHA bins.
# Reduced chi-squared = 0.8450 for 56 degrees of freedom
# Null hypothesis probability = 7.889983e-01
Photon flux (15-150 keV) in 64 sec: 0.150904 ( -0.020846 0.021034 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.41583e-07 ( -8.0905e-08 9.83917e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.51120 ( -4.59855 1.61628 )
beta : -10.0000 ( 10 1.42109e-14 )
Epeak [keV] : 14.9936 ( -9.3143 12.7246 )
Norm@50keV : 3.85046E-03 ( -0.0024367 0.0733776 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.32 using 59 PHA bins.
# Reduced chi-squared = 0.8604 for 55 degrees of freedom
# Null hypothesis probability = 7.595918e-01
Photon flux (15-150 keV) in 64 sec: 0.146905 ( 6.85309 -0.021095 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.40886e-07 ( 0 0 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 6.55979 (-0.969574 1.12343)
R^2/D10^2 : 0.382735 (-0.186041 0.376918)
(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 1.575e-07 4.032e-08
25- 50 1.895e-07 5.024e-08
50-150 2.469e-08 1.217e-08
15-150 3.717e-07 7.779e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 27.5168 (-7.533 11.3099)
Norm : 1.34391 (-0.357719 0.537251)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.670e-07 2.963e-08
25- 50 1.816e-07 3.866e-08
50-150 8.855e-08 4.660e-08
15-150 4.372e-07 9.082e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.42053 (-2.03841 1.68848)
R1^2/D10^2 : 1.48475 (-1.04026 21.7306)
kT2 [keV] : 12.1078 (-9.72368 12.4439)
R2^2/D10^2 : 1.71481E-02 (-0.0164626 0.0936553)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.715e-07 9.158e-08
25- 50 1.737e-07 9.075e-08
50-150 9.744e-08 6.394e-08
15-150 4.426e-07 2.295e-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: 2.59555 ( -0.290513 0.327861 )
Norm@50keV : 7.40431E-04 ( -0.000181392 0.000183219 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.34 using 59 PHA bins.
# Reduced chi-squared = 0.8656 for 57 degrees of freedom
# Null hypothesis probability = 7.545883e-01
Photon flux (15-150 keV) in 64 sec: 0.154405 ( -0.0208875 0.0208969 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.87103e-07 ( -8.33696e-08 8.78662e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.51011 ( -1.8748 0.495096 )
Epeak [keV] : 14.9564 ( )
Norm@50keV : 3.87123E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.32 using 59 PHA bins.
# Reduced chi-squared = 0.8450 for 56 degrees of freedom
# Null hypothesis probability = 7.889983e-01
Photon flux (15-150 keV) in 64 sec: 0.150904 ( -0.020846 0.021034 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.41583e-07 ( -8.0905e-08 9.83917e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.51120 ( -3.34157 1.61628 )
beta : -10.0000 ( 10 3.55271e-15 )
Epeak [keV] : 14.9936 ( -9.31431 12.7246 )
Norm@50keV : 3.85046E-03 ( -0.0024367 0.0733776 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.32 using 59 PHA bins.
# Reduced chi-squared = 0.8604 for 55 degrees of freedom
# Null hypothesis probability = 7.595918e-01
Photon flux (15-150 keV) in 64 sec: 0.146905 ( 6.85309 -0.021095 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.40886e-07 ( 0 0 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 1.63e-07
S(50-100 keV) = 1.08e-07
T90 vs. Hardness ratio plot
T90 = 64 sec.
Hardness ratio (energy fluence ratio) = 0.662577
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.78886
Count Ratio (50-100 keV) / (15-25 keV) = 0.260863
Mask shadow pattern
IMX = -3.489078111370097E-01, IMY = 1.907786894969980E-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 64.000000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.6362 -40.7061 39.8 36.6 34.2 0.0691 0.3 10.3 Vela X-1
170.2724 -60.4756 8.3 7.7 26.9 -0.1736 -1.4 8.9 Cen X-3
187.0783 -62.8387 27.3 1.0 -95.7 -0.0587 -0.4 12.3 GX 301-2
255.8958 -37.7662 7.1 48.0 -153.8 0.5348 1.6 6.4 4U 1700-377
256.4273 -36.4000 3.4 49.4 -154.4 -1.2351 -3.4 1.4 GX 349+2
264.6561 -44.4137 28.7 46.8 -141.2 0.1369 0.4 4.3 4U 1735-44
262.8528 -33.8000 10.9 54.5 -150.8 0.6722 1.1 7.1 GX 354-0
214.1345 -24.5658 2.4 41.9 152.4 1.5077 4.8 ------ UNKNOWN
147.7375 -58.7782 2.7 18.9 15.1 0.5769 4.2 ------ UNKNOWN
186.1310 -61.9809 1.1 0.0 175.8 1.4175 10.1 ------ UNKNOWN
228.5111 -57.0038 1.3 21.7 -151.3 1.2102 8.7 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
527.500590 540.740000
541.000000 558.140000
559.000000 560.510000
562.000000 633.590000
640.000000 652.130500
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.3392 -60.5183 3.0 29.4 32.8 -1.1501 -3.9 6.3 Cen X-3
186.4900 -62.9484 45.1 21.4 30.8 0.0649 0.3 11.6 GX 301-2
244.8684 -15.6161 5.1 43.2 177.7 1.0005 2.3 6.6 Sco X-1
255.9604 -37.7896 8.6 26.4 -150.6 0.3517 1.4 3.5 4U 1700-377
256.3020 -36.5564 5.5 27.5 -151.6 0.5847 2.1 10.3 GX 349+2
262.9843 -24.8782 65.8 40.5 -153.5 0.0729 0.2 8.1 GX 1+4
264.7882 -44.5913 4.4 25.6 -128.9 0.7791 2.6 8.7 4U 1735-44
270.2603 -25.0979 6.2 43.6 -144.8 0.9163 1.9 1.7 GX 5-1
270.3022 -25.8391 8.4 43.0 -144.1 -0.6349 -1.4 5.8 GRS 1758-258
274.0065 -14.0357 133.8 55.0 -148.0 -0.1196 -0.1 0.1 GX 17+2
275.9966 -30.2624 4.6 42.2 -134.3 -1.4729 -2.5 7.3 H1820-303
263.0217 -33.6936 9.4 33.0 -145.7 -0.4178 -1.2 8.6 GX 354-0
136.4415 -57.3426 2.0 46.0 23.0 2.6513 5.7 ------ UNKNOWN
186.1079 -62.0820 0.9 21.7 33.1 3.4093 13.5 ------ UNKNOWN
228.8623 -57.0473 1.5 0.2 -96.1 1.8112 7.7 ------ UNKNOWN
70.3321 -67.2912 2.5 54.7 -15.5 3.0202 4.6 ------ UNKNOWN
Plot creation:
Mon Mar 4 20:14:16 EST 2024