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
261.9381 -16.2022 0.0030 21.8 -136.4 40.6460 65.4 TRIG_01187142
------------------------------------------
Foreground time interval of the image:
-15.699 175.276 (delta_t = 190.975 [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 144.000000
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 144.000000
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 144.000000
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
Time interval is from -75.476 sec. to 175.276 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.69475 ( )
Norm@50keV : 9.67522E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 116.14 using 59 PHA bins.
# Reduced chi-squared = 2.0376 for 57 degrees of freedom
# Null hypothesis probability = 6.276532e-06
Photon flux (15-150 keV) in 250.8 sec: 2.15190 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.57669e-05 ( 0 0 ) ergs/cm2
Cutoff power-law model
Time interval is from -75.476 sec. to 175.276 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.87363 ( -0.191172 0.117003 )
Epeak [keV] : 7.11752 ( )
Norm@50keV : 2.54681E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.16 using 59 PHA bins.
# Reduced chi-squared = 0.9492 for 56 degrees of freedom
# Null hypothesis probability = 5.831382e-01
Photon flux (15-150 keV) in 250.8 sec: 1.95510 ( -0.06644 0.06731 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.38243e-05 ( -6.21934e-07 6.26022e-07 ) ergs/cm2
Band function
Time interval is from -75.476 sec. to 175.276 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.68873 ( -0.307435 0.962302 )
beta : -3.21162 ( 3.21404 0.298125 )
Epeak [keV] : 13.6763 ( -8.75029 10.8261 )
Norm@50keV : 3.27550E-02 ( -0.0106384 0.104943 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.05 using 59 PHA bins.
# Reduced chi-squared = 0.9463 for 55 degrees of freedom
# Null hypothesis probability = 5.882343e-01
Photon flux (15-150 keV) in 250.8 sec: 1.65880 ( 5.3412 -0.06567 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.37768e-05 ( -2.3775e-05 -6.12755e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.72493 ( )
R^2/D10^2 : 0.815350 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 533.94 using 59 PHA bins.
# Reduced chi-squared = 9.3673 for 57 degrees of freedom
# Null hypothesis probability = 1.182411e-78
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.899e-06 1.480e-07
25- 50 9.314e-06 2.107e-07
50-150 4.482e-06 1.718e-07
15-150 1.769e-05 3.662e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 35.9332 (-1.3361 1.41368)
Norm : 13.1228 (-0.601809 0.630257)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.267e-06 2.245e-07
25- 50 9.108e-06 1.806e-07
50-150 6.240e-06 2.132e-07
15-150 2.261e-05 4.239e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.72281 (-0.353668 0.360804)
R1^2/D10^2 : 6.16714 (-1.38525 1.93327)
kT2 [keV] : 15.7685 (-0.981444 1.15858)
R2^2/D10^2 : 6.50161E-02 (-0.0193495 0.0248936)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.109e-06 4.866e-07
25- 50 9.124e-06 3.436e-07
50-150 6.462e-06 3.361e-07
15-150 2.270e-05 8.765e-07
Peak spectrum fit
Power-law model
Time interval is from -22.328 sec. to -21.328 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.53975 ( -0.175419 0.185231 )
Norm@50keV : 1.45022E-02 ( -0.00195303 0.00194125 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.00 using 59 PHA bins.
# Reduced chi-squared = 1.018 for 57 degrees of freedom
# Null hypothesis probability = 4.381751e-01
Photon flux (15-150 keV) in 1 sec: 2.91971 ( -0.256399 0.256495 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.46622e-07 ( -1.46861e-08 1.49432e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -22.328 sec. to -21.328 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.28042 ( -1.12536 0.628327 )
Epeak [keV] : 19.6674 ( )
Norm@50keV : 9.42827E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.04 using 59 PHA bins.
# Reduced chi-squared = 0.9294 for 56 degrees of freedom
# Null hypothesis probability = 6.253398e-01
Photon flux (15-150 keV) in 1 sec: 2.82842 ( -0.26123 0.26204 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.31766e-07 ( -1.4787e-08 1.6604e-08 ) ergs/cm2
Band function
Time interval is from -22.328 sec. to -21.328 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.17367 ( )
beta : -8.31700 ( )
Epeak [keV] : 61.0169 ( )
Norm@50keV : 3.81663E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 110.52 using 59 PHA bins.
# Reduced chi-squared = 2.0095 for 55 degrees of freedom
# Null hypothesis probability = 1.338423e-05
Photon flux (15-150 keV) in 1 sec: 2.82761 ( 4.17239 -0.26705 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.38337e-07 ( -1.3833e-07 -1.5554e-08 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.11904 (-0.650387 0.714868)
R^2/D10^2 : 5.11560 (-1.7293 2.63038)
(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 4.237e-08 5.660e-09
25- 50 5.994e-08 7.175e-09
50-150 1.055e-08 3.324e-09
15-150 1.129e-07 1.171e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 30.0395 (-5.28343 6.82513)
Norm : 23.4633 (-4.1795 5.2379)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.779e-08 5.635e-09
25- 50 5.464e-08 5.720e-09
50-150 2.998e-08 8.575e-09
15-150 1.324e-07 1.520e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.15079 (-1.17049 1.10804)
R1^2/D10^2 : 15.3766 (-7.80631 23.9471)
kT2 [keV] : 14.0607 (-4.10319 9.90053)
R2^2/D10^2 : 0.150525 (-0.135996 0.686962)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.834e-08 2.092e-08
25- 50 5.300e-08 2.280e-08
50-150 3.201e-08 1.770e-08
15-150 1.334e-07 5.679e-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: 2.71625 ( )
Norm@50keV : 9.65582E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 116.64 using 59 PHA bins.
# Reduced chi-squared = 2.0464 for 57 degrees of freedom
# Null hypothesis probability = 5.479603e-06
Photon flux (15-150 keV) in 191 sec: 2.17844 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.97324e-05 ( 0 0 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.79134 ( -0.214421 0.196269 )
Epeak [keV] : 10.2877 ( -9.25512 6.76091 )
Norm@50keV : 2.90759E-02 ( -0.00563093 0.00835848 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.67 using 59 PHA bins.
# Reduced chi-squared = 0.7799 for 56 degrees of freedom
# Null hypothesis probability = 8.847428e-01
Photon flux (15-150 keV) in 191 sec: 1.96037 ( -0.06804 0.06895 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.80814e-05 ( -4.86401e-07 4.89991e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.51327 ( -0.190364 0.627841 )
beta : -3.25336 ( -0.598743 0.230627 )
Epeak [keV] : 17.4716 ( -9.78408 6.74219 )
Norm@50keV : 4.24935E-02 ( -0.0152766 0.0626156 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.26 using 59 PHA bins.
# Reduced chi-squared = 0.7321 for 55 degrees of freedom
# Null hypothesis probability = 9.318233e-01
Photon flux (15-150 keV) in 191 sec: 1.65880 ( 5.3412 -0.06567 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.80322e-05 ( -1.80308e-05 -4.78932e-07 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 8.65e-06
S(50-100 keV) = 5.35e-06
T90 vs. Hardness ratio plot
T90 = 215.303999900818 sec.
Hardness ratio (energy fluence ratio) = 0.618497
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.859079
Count Ratio (50-100 keV) / (15-25 keV) = 0.267674
Mask shadow pattern
IMX = -2.898683398350924E-01, IMY = 2.761847285970451E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 144.000000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 144.000000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 144.000000
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:
-119.000000 78.840000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
245.1280 -15.6615 6.7 34.9 -117.9 1.3455 1.7 8.7 Sco X-1
254.4371 35.4795 5.6 45.3 -33.6 -1.9929 -2.1 8.3 Her X-1
256.0871 -37.7823 6.3 39.7 -157.5 1.2206 1.8 6.0 4U 1700-377
256.4690 -36.3211 423.0 38.4 -156.5 -0.0172 -0.0 6.3 GX 349+2
263.1391 -24.9208 0.0 25.8 -152.1 1.4096 2.9 12.7 GX 1+4
264.5626 -44.5527 4.1 42.6 -170.9 2.0049 2.8 9.9 4U 1735-44
268.5012 -1.4316 7.8 10.3 -82.7 0.6867 1.5 8.1 SW J1753.5-0127
270.2946 -25.0447 5.1 22.7 -166.0 -1.0502 -2.3 2.1 GX 5-1
270.4024 -25.9005 92.5 23.4 -167.0 -0.0569 -0.1 10.9 GRS 1758-258
273.8502 -14.0622 3.9 11.3 -161.7 -1.3293 -2.9 9.2 GX 17+2
275.9526 -30.4496 26.7 26.8 179.3 -0.2149 -0.4 5.2 H1820-303
284.9950 -24.7700 5.1 21.9 158.4 -1.0639 -2.2 9.3 HT1900.1-2455
288.6659 11.1123 0.0 18.0 28.3 0.3911 0.9 12.7 GRS 1915+105
299.4871 35.3798 10.5 43.8 19.2 1.0052 1.1 11.8 Cyg X-1
308.1503 41.0644 4.8 52.4 22.4 -5.1141 -2.4 6.9 Cyg X-3
262.9790 -33.6805 4.9 33.2 -161.6 1.2961 2.3 9.3 GX 354-0
290.9478 14.5128 3.1 22.1 28.0 1.9627 3.7 ------ UNKNOWN
261.3380 -17.6569 0.3 21.8 -136.4 19.8513 38.9 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-15.699380 175.276000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9849 -15.6413 1.8 36.1 -119.4 6.8748 6.3 0.3 Sco X-1
254.5797 35.3673 10.0 44.0 -34.6 1.3317 1.1 6.2 Her X-1
256.0254 -37.8009 29.2 41.3 -157.8 0.3364 0.4 3.2 4U 1700-377
256.4768 -36.2811 4.3 39.9 -156.8 -2.3383 -2.7 8.7 GX 349+2
262.9899 -24.7414 52.1 27.3 -152.5 0.1439 0.2 1.1 GX 1+4
264.9098 -44.3373 35.7 43.9 -171.1 -0.2877 -0.3 9.8 4U 1735-44
268.5021 -1.6148 0.0 10.5 -92.3 1.0817 1.8 12.6 SW J1753.5-0127
270.4326 -25.1147 5.2 24.3 -166.5 -1.2925 -2.2 8.3 GX 5-1
270.4341 -25.9128 0.0 25.1 -167.2 1.1978 2.0 12.4 GRS 1758-258
274.1640 -13.9777 4.7 12.7 -163.8 1.4258 2.4 9.9 GX 17+2
275.8816 -30.4798 17.7 28.4 -180.0 0.4243 0.7 7.1 H1820-303
285.2058 -24.7787 0.0 23.3 160.0 -1.2934 -2.0 12.6 HT1900.1-2455
288.6374 10.8163 0.0 16.2 30.6 -0.9389 -1.7 12.3 GRS 1915+105
299.5995 35.1930 1.3 42.1 19.8 9.8609 9.0 0.7 Cyg X-1
307.9973 40.9630 3.7 50.6 22.7 6.8593 3.1 5.2 Cyg X-3
262.8633 -33.6568 0.0 34.8 -161.7 1.9344 2.7 12.4 GX 354-0
299.3543 49.0844 3.1 54.3 10.7 9.2668 3.8 ------ UNKNOWN
261.9381 -16.2022 0.2 21.8 -136.4 40.6411 65.4 ------ UNKNOWN
247.6029 -18.2359 2.6 34.7 -125.2 3.9597 4.4 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
Plot creation:
Sat Aug 26 12:40:29 EDT 2023