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
248.3779 -47.6537 0.0189 31.9 -12.3 6.9590 10.2 TRIG_01159437
------------------------------------------
Foreground time interval of the image:
0.000 178.510 (delta_t = 178.510 [sec])
180.000 368.000 (delta_t = 188.000 [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 178.510000
180.000000 368.000000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.10914 ( -0.235022 0.252194 )
Norm@50keV : 5.78420E-04 ( -0.000104359 0.000107382 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.72 using 59 PHA bins.
# Reduced chi-squared = 1.171 for 57 degrees of freedom
# Null hypothesis probability = 1.775300e-01
Photon flux (15-150 keV) in 366.5 sec: 0.172401 ( -0.0149833 0.0150312 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.68358e-06 ( -2.51905e-07 2.57043e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
0.000000 178.510000
180.000000 368.000000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 2.62660E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 163.16 using 59 PHA bins.
# Reduced chi-squared = 2.9135 for 56 degrees of freedom
# Null hypothesis probability = 2.075627e-12
Photon flux (15-150 keV) in 366.5 sec: 0.172409 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.67942e-06 ( -2.90711e-07 2.60886e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
0.000000 178.510000
180.000000 368.000000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.46415 ( )
beta : -8.23982 ( )
Epeak [keV] : 29.1037 ( )
Norm@50keV : 2.19364E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 120.27 using 59 PHA bins.
# Reduced chi-squared = 2.1867 for 55 degrees of freedom
# Null hypothesis probability = 9.013907e-07
Photon flux (15-150 keV) in 366.5 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] : 5.22162 (-0.491768 0.55203)
R^2/D10^2 : 1.10246 (-0.428305 0.71174)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 86.93 using 59 PHA bins.
# Reduced chi-squared = 1.525 for 57 degrees of freedom
# Null hypothesis probability = 6.502055e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.165e-06 1.752e-07
25- 50 8.456e-07 1.307e-07
50-150 4.223e-08 1.783e-08
15-150 2.053e-06 2.653e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 16.9843 (-3.05125 4.00529)
Norm : 2.46858 (-0.642091 0.920185)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.205e-06 1.565e-07
25- 50 9.217e-07 1.261e-07
50-150 2.067e-07 7.786e-08
15-150 2.333e-06 2.379e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.40612 (-0.605079 0.600875)
R1^2/D10^2 : 2.31832 (-1.06923 2.43058)
kT2 [keV] : 20.0727 (-7.35921 15.6856)
R2^2/D10^2 : 1.64794E-03 (-0.001417 0.00879888)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.258e-06 2.505e-07
25- 50 8.053e-07 1.961e-07
50-150 7.111e-07 4.428e-07
15-150 2.774e-06 7.387e-07
Peak spectrum fit
Power-law model
Time interval is from 180.000 sec. to 368.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.10914 ( -0.235022 0.252194 )
Norm@50keV : 5.78420E-04 ( -0.000104359 0.000107382 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.72 using 59 PHA bins.
# Reduced chi-squared = 1.171 for 57 degrees of freedom
# Null hypothesis probability = 1.775300e-01
Photon flux (15-150 keV) in 366.5 sec: 0.172401 ( -0.0149833 0.0150312 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.68358e-06 ( -2.51905e-07 2.57043e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 180.000 sec. to 368.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 2.62660E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 163.16 using 59 PHA bins.
# Reduced chi-squared = 2.9135 for 56 degrees of freedom
# Null hypothesis probability = 2.075627e-12
Photon flux (15-150 keV) in 366.5 sec: 0.172409 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.67942e-06 ( -2.90711e-07 2.60886e-07 ) ergs/cm2
Band function
Time interval is from 180.000 sec. to 368.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.46415 ( )
beta : -8.23982 ( )
Epeak [keV] : 29.1037 ( )
Norm@50keV : 2.19364E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 120.27 using 59 PHA bins.
# Reduced chi-squared = 2.1867 for 55 degrees of freedom
# Null hypothesis probability = 9.013907e-07
Photon flux (15-150 keV) in 366.5 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] : 5.22162 (-0.491768 0.55203)
R^2/D10^2 : 1.10246 (-0.428305 0.71174)
(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 1.165e-06 1.653e-07
25- 50 8.456e-07 1.407e-07
50-150 4.223e-08 1.810e-08
15-150 2.053e-06 2.320e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 16.9843 (-3.05125 4.00529)
Norm : 2.46858 (-0.642091 0.920185)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.205e-06 1.360e-07
25- 50 9.217e-07 1.220e-07
50-150 2.067e-07 7.926e-08
15-150 2.333e-06 2.417e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.40612 (-0.605079 0.600875)
R1^2/D10^2 : 2.31832 (-1.06923 2.43058)
kT2 [keV] : 20.0727 (-7.35921 15.6856)
R2^2/D10^2 : 1.64794E-03 (-0.001417 0.00879888)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.258e-06 2.505e-07
25- 50 8.053e-07 1.730e-07
50-150 7.111e-07 4.119e-07
15-150 2.774e-06 7.632e-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: 3.10914 ( -0.235022 0.252194 )
Norm@50keV : 5.78420E-04 ( -0.000104359 0.000107382 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.72 using 59 PHA bins.
# Reduced chi-squared = 1.171 for 57 degrees of freedom
# Null hypothesis probability = 1.775300e-01
Photon flux (15-150 keV) in 366.5 sec: 0.172401 ( -0.0149833 0.0150312 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.68358e-06 ( -2.51905e-07 2.57043e-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 : 2.62660E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 163.16 using 59 PHA bins.
# Reduced chi-squared = 2.9135 for 56 degrees of freedom
# Null hypothesis probability = 2.075627e-12
Photon flux (15-150 keV) in 366.5 sec: 0.172409 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.67942e-06 ( -2.90711e-07 2.60886e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.46415 ( )
beta : -8.23982 ( )
Epeak [keV] : 29.1037 ( )
Norm@50keV : 2.19364E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 120.27 using 59 PHA bins.
# Reduced chi-squared = 2.1867 for 55 degrees of freedom
# Null hypothesis probability = 9.013907e-07
Photon flux (15-150 keV) in 366.5 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) = 8.86e-07
S(50-100 keV) = 4.11e-07
T90 vs. Hardness ratio plot
T90 = 368 sec.
Hardness ratio (energy fluence ratio) = 0.463883
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.568676
Count Ratio (50-100 keV) / (15-25 keV) = 0.167474
Mask shadow pattern
IMX = 6.074008469338011E-01, IMY = 1.321910423810511E-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 178.510000
180.000000 368.000000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
245.0501 -15.8013 0.3 0.1 167.5 21.0258 36.4 10.5 Sco X-1
254.5697 35.3294 4.9 52.0 -178.2 5.2473 2.4 5.5 Her X-1
255.9471 -37.9906 4.6 24.1 -29.4 1.6815 2.5 9.0 4U 1700-377
256.6087 -36.3484 5.6 22.9 -32.5 -1.3801 -2.1 9.5 GX 349+2
262.8673 -24.6783 4.6 18.8 -67.4 -1.7160 -2.5 8.7 GX 1+4
264.6585 -44.3134 40.8 32.9 -34.3 -0.2156 -0.3 9.0 4U 1735-44
268.3175 -1.5871 8.5 27.0 -127.7 -0.9576 -1.4 8.6 SW J1753.5-0127
270.1216 -24.9487 0.0 25.1 -72.9 -2.2175 -2.9 11.8 GX 5-1
270.3479 -25.8780 10.7 25.6 -70.9 0.8060 1.1 8.5 GRS 1758-258
273.9293 -13.9015 4.9 27.9 -98.3 -2.1055 -2.4 9.2 GX 17+2
275.8246 -30.2760 23.5 31.6 -65.5 -0.4442 -0.5 7.5 H1820-303
284.9787 -24.9192 11.2 38.3 -77.8 -1.5452 -1.0 3.1 HT1900.1-2455
263.1373 -33.9713 9.8 24.3 -46.7 0.8762 1.2 11.0 GX 354-0
211.3876 5.2779 2.3 39.5 111.7 9.4587 5.1 ------ UNKNOWN
245.4001 14.3629 2.6 30.3 172.6 3.0441 4.5 ------ UNKNOWN
252.3726 39.2913 3.9 55.6 178.8 9.9012 3.0 ------ UNKNOWN
248.3779 -47.6537 1.1 31.9 -12.3 6.9588 10.2 ------ UNKNOWN
284.8184 -36.2569 2.5 40.7 -60.3 6.6171 4.5 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
661.600600 723.010800
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.6320 35.2820 6.6 37.5 109.9 0.5658 1.8 9.3 Her X-1
263.1110 -24.8072 9.0 49.5 16.8 0.3767 1.3 6.7 GX 1+4
268.2628 -1.5074 6.4 28.8 36.3 -0.2889 -1.8 7.1 SW J1753.5-0127
270.1875 -24.9993 6.1 46.2 9.4 0.4546 1.9 7.1 GX 5-1
270.3284 -25.7136 5.2 46.7 8.7 -0.5591 -2.2 2.3 GRS 1758-258
274.0630 -13.9238 5.4 34.7 12.7 -0.3693 -2.1 7.5 GX 17+2
275.8020 -30.3728 6.3 49.1 0.3 -0.4453 -1.8 6.4 H1820-303
285.1693 -24.9204 3.7 41.8 -9.2 0.5777 3.1 7.3 HT1900.1-2455
288.6603 10.8904 5.7 6.0 6.3 0.2661 2.1 8.8 GRS 1915+105
299.6855 35.0103 0.0 20.1 -176.5 0.6390 4.9 12.4 Cyg X-1
308.2126 40.8024 10.5 28.5 -169.5 -0.1598 -1.1 10.1 Cyg X-3
326.2476 38.1732 7.7 37.7 -149.5 0.3082 1.5 9.6 Cyg X-2
277.8696 29.6503 2.9 17.9 122.5 0.5668 4.0 ------ UNKNOWN
299.0374 -5.3479 2.6 23.1 -37.7 0.6513 4.5 ------ UNKNOWN
Plot creation:
Sun Mar 12 20:56:33 EDT 2023