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
244.8102 -15.6466 0.9922 36.2 -122.8 -0.0256 -0.2 TRIG_01192480
------------------------------------------
Foreground time interval of the image:
48.212 71.301 (delta_t = 23.089 [sec])
Background time interval of the image:
-17.799 48.212 (delta_t = 66.011 [sec])
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 48.212 sec. to 94.068 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 5.74281 ( -0.631139 0.701387 )
Norm@50keV : 1.47175E-04 ( -7.79502e-05 0.000130145 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.99 using 59 PHA bins.
# Reduced chi-squared = 0.9122 for 57 degrees of freedom
# Null hypothesis probability = 6.628762e-01
Photon flux (15-150 keV) in 45.86 sec: 0.468460 ( -0.06611 0.0661441 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.54064e-07 ( -9.75043e-08 9.87737e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 48.212 sec. to 94.068 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 3.19724E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 166.80 using 59 PHA bins.
# Reduced chi-squared = 2.9785 for 56 degrees of freedom
# Null hypothesis probability = 6.041159e-13
Photon flux (15-150 keV) in 45.86 sec: 0.479035 ( -0.066339 0.066233 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.46126e-07 ( -8.8973e-08 8.84273e-08 ) ergs/cm2
Band function
Time interval is from 48.212 sec. to 94.068 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -8.29138 ( 8.29138 8.29138 )
beta : -5.75990 ( -0.687773 0.644725 )
Epeak [keV] : 4.41363 ( -4.41363 -4.41363 )
Norm@50keV : 1.96416E-02 ( -0.0103506 0.0179333 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.00 using 59 PHA bins.
# Reduced chi-squared = 0.9454 for 55 degrees of freedom
# Null hypothesis probability = 5.901244e-01
Photon flux (15-150 keV) in 45.86 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] : 2.58007 (-0.290606 0.328172)
R^2/D10^2 : 190.221 (-109.324 276.582)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.44 using 59 PHA bins.
# Reduced chi-squared = 0.7971 for 57 degrees of freedom
# Null hypothesis probability = 8.649290e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.998e-07 2.597e-07
25- 50 5.001e-08 2.441e-08
50-150 2.141e-11 2.133e-11
15-150 6.499e-07 2.875e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 4.63615 (-0.774254 0.9727)
Norm : 146.179 (-73.8737 166.273)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.878e-07 2.058e-07
25- 50 6.230e-08 2.996e-08
50-150 2.175e-10 2.289e-10
15-150 6.504e-07 2.105e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.57021 (-0.318288 0.349528)
R1^2/D10^2 : 195.310 (-113.444 278.83)
kT2 [keV] : 200.000 (-200 -200)
R2^2/D10^2 : 5.83470E-06 (-5.98872e-06 -5.98872e-06)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.989e-07 2.952e-07
25- 50 5.067e-08 2.838e-08
50-150 1.431e-08 2.246e-11
15-150 6.639e-07 3.003e-07
Peak spectrum fit
Power-law model
Time interval is from 65.412 sec. to 66.412 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 4.34549 ( -1.39272 1.93754 )
Norm@50keV : 1.18271E-03 ( -0.00118258 0.00291638 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.01 using 59 PHA bins.
# Reduced chi-squared = 0.8598 for 57 degrees of freedom
# Null hypothesis probability = 7.652488e-01
Photon flux (15-150 keV) in 1 sec: 0.991922 ( -0.362796 0.365995 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.38611e-08 ( -1.44379e-08 1.8361e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 65.412 sec. to 66.412 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 1.52549E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.95 using 59 PHA bins.
# Reduced chi-squared = 1.088 for 56 degrees of freedom
# Null hypothesis probability = 3.026533e-01
Photon flux (15-150 keV) in 1 sec: 0.981126 ( -0.353029 0.372944 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.39199e-08 ( -1.67571e-08 1.82744e-08 ) ergs/cm2
Band function
Time interval is from 65.412 sec. to 66.412 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.48134 ( 1.67771 1.67771 )
beta : -6.78328 ( 4.85312 1.83763 )
Epeak [keV] : 13.3640 ( -6.01147 10.6179 )
Norm@50keV : 6687.32 ( -6687.25 198322 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.28 using 59 PHA bins.
# Reduced chi-squared = 0.8779 for 55 degrees of freedom
# Null hypothesis probability = 7.271820e-01
Photon flux (15-150 keV) in 1 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] : 2.86120 (-0.76793 1.062)
R^2/D10^2 : 185.999 (-186.012 1393.09)
(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 2.575e-08 1.498e-08
25- 50 3.172e-09 2.076e-09
50-150 3.445e-12 4.445e-12
15-150 2.893e-08 1.705e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 5.92201 (-2.44812 6.58368)
Norm : 124.180 (-124.18 702.04)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.478e-08 1.489e-08
25- 50 4.491e-09 3.273e-09
50-150 5.119e-11 6.475e-11
15-150 2.933e-08 1.744e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.84103 (-0.760812 0.972321)
R1^2/D10^2 : 193.025 (-163.396 1449.13)
kT2 [keV] : 199.135 (-199.259 -199.259)
R2^2/D10^2 : 8.85212E-05 (-8.05818e-05 0.0249384)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.564e-08 1.479e-08
25- 50 4.025e-09 2.076e-09
50-150 2.341e-08 6.145e-09
15-150 5.307e-08 1.841e-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: 5.85700 ( -0.842923 0.988076 )
Norm@50keV : 1.30490E-04 ( -0.000130455 0.000179402 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.90 using 59 PHA bins.
# Reduced chi-squared = 0.9105 for 57 degrees of freedom
# Null hypothesis probability = 6.664511e-01
Photon flux (15-150 keV) in 23.09 sec: 0.465349 ( -0.0845395 0.0847078 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.25096e-07 ( -6.41179e-08 6.60226e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.33874 ( )
Epeak [keV] : 10.3196 ( )
Norm@50keV : 1269.36 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.17 using 59 PHA bins.
# Reduced chi-squared = 0.8780 for 56 degrees of freedom
# Null hypothesis probability = 7.290864e-01
Photon flux (15-150 keV) in 23.09 sec: 0.478638 ( -0.083166 0.083046 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.23405e-07 ( -5.80298e-08 5.85585e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -8.31180 ( 6.08959 8.3118 )
beta : -5.99395 ( -0.879232 0.968407 )
Epeak [keV] : 447.100 ( -447.1 -447.1 )
Norm@50keV : 1.52600E-02 ( -0.00999099 0.0264937 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.96 using 59 PHA bins.
# Reduced chi-squared = 0.9447 for 55 degrees of freedom
# Null hypothesis probability = 5.915660e-01
Photon flux (15-150 keV) in 23.09 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.2118e-07 ( -3.21018e-07 -5.69307e-08 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 8.95e-08
S(50-100 keV) = 6.69e-09
T90 vs. Hardness ratio plot
T90 = 31.5519999265671 sec.
Hardness ratio (energy fluence ratio) = 0.0747486
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.0488658
Count Ratio (50-100 keV) / (15-25 keV) = -0.00845401
Mask shadow pattern
IMX = -3.966449687910796E-01, IMY = 6.164970427871760E-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:
-17.799410 48.212000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.8311 -15.6331 1.0 36.2 -122.7 3.4906 11.3 8.6 Sco X-1
254.4969 35.3879 14.0 44.1 -38.1 -0.3133 -0.8 3.3 Her X-1
256.0407 -37.7771 16.9 41.3 -161.2 -0.1800 -0.7 4.8 4U 1700-377
256.3066 -36.3340 7.6 40.0 -160.1 0.3910 1.5 8.2 GX 349+2
263.0222 -24.9017 106.2 27.4 -156.1 -0.0215 -0.1 9.4 GX 1+4
264.6144 -44.3655 8.8 44.0 -174.2 -0.3733 -1.3 7.5 4U 1735-44
268.2012 -1.5426 5.3 10.8 -95.3 0.4053 2.2 11.4 SW J1753.5-0127
270.1256 -25.1030 4.3 24.4 -169.2 0.4669 2.7 8.7 GX 5-1
270.4229 -25.9104 12.1 25.0 -170.5 -0.1679 -1.0 12.0 GRS 1758-258
273.8955 -13.9688 10.8 12.7 -165.9 0.1900 1.1 7.6 GX 17+2
275.7584 -30.4178 19.6 28.3 176.9 -0.1191 -0.6 9.1 H1820-303
285.0727 -24.8115 6.4 23.3 156.9 -0.3414 -1.8 6.8 HT1900.1-2455
288.6447 10.9204 175.2 16.3 26.7 0.0117 0.1 9.2 GRS 1915+105
299.4605 35.2604 2.2 42.1 16.1 1.9574 5.3 7.3 Cyg X-1
308.1233 41.0635 4.4 50.8 19.2 1.6239 2.6 6.7 Cyg X-3
263.1298 -33.8864 7.4 34.9 -165.7 0.3397 1.6 7.7 GX 354-0
308.4185 37.4573 2.7 48.2 22.5 2.1556 4.3 ------ UNKNOWN
275.2256 -58.6367 2.8 56.4 173.3 3.4237 4.1 ------ UNKNOWN
293.6455 44.0950 2.1 48.2 5.0 2.1105 5.5 ------ UNKNOWN
261.7529 -16.1644 0.4 21.9 -139.3 6.4023 31.7 ------ UNKNOWN
251.6307 -30.0246 2.8 38.0 -148.7 1.0105 4.2 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
48.212000 71.300600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.8488 -15.6579 3.3 36.2 -122.8 -0.4645 -3.5 7.6 Sco X-1
254.4907 35.4823 6.5 44.2 -38.1 0.2904 1.8 8.5 Her X-1
255.8296 -37.8649 12.0 41.4 -161.0 -0.1087 -1.0 7.5 4U 1700-377
256.5113 -36.3965 7.3 39.9 -160.4 0.1712 1.6 4.0 GX 349+2
262.8672 -24.8631 7.6 27.4 -155.8 -0.1281 -1.5 10.5 GX 1+4
264.7577 -44.3726 5.3 43.9 -174.4 0.2587 2.2 4.7 4U 1735-44
268.2106 -1.4851 4.6 10.8 -95.0 -0.1889 -2.5 9.6 SW J1753.5-0127
270.4438 -25.0504 4.8 24.2 -169.8 -0.1822 -2.4 8.8 GX 5-1
270.4778 -25.6364 8.0 24.8 -170.4 0.1149 1.5 11.4 GRS 1758-258
273.8628 -13.9780 3.7 12.8 -165.8 -0.2331 -3.1 9.0 GX 17+2
276.1047 -30.2417 1255.0 28.1 176.3 0.0008 0.0 12.0 H1820-303
284.9328 -24.8998 4.7 23.3 157.3 0.1941 2.4 5.8 HT1900.1-2455
288.8571 11.0510 3.7 16.5 27.0 0.2434 3.1 7.2 GRS 1915+105
299.7351 35.2122 8.3 42.2 16.4 0.2112 1.4 7.1 Cyg X-1
308.0695 41.0430 4.1 50.8 19.2 -0.9681 -2.8 5.7 Cyg X-3
262.8461 -33.7915 9.7 34.9 -165.2 -0.1099 -1.2 7.6 GX 354-0
Post-slew image of 15-350 keV band
Time interval of the image:
149.100590 238.410000
240.000000 243.100100
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.8282 -15.5976 0.7 0.1 80.9 4.4201 16.4 9.1 Sco X-1
254.4243 35.4455 15.0 51.9 2.4 0.5650 0.8 6.4 Her X-1
255.8223 -37.7172 4.3 24.2 150.6 0.7924 2.7 10.9 4U 1700-377
256.2699 -36.3180 15.8 23.1 148.2 0.2105 0.7 10.2 GX 349+2
262.8504 -24.6362 27.3 19.2 113.3 -0.1351 -0.4 10.9 GX 1+4
264.5628 -44.3225 0.0 33.3 146.1 -0.2217 -0.5 10.9 4U 1735-44
268.5125 -1.4387 8.0 27.4 53.5 -0.5380 -1.4 8.7 SW J1753.5-0127
270.3560 -25.0238 9.2 25.7 108.0 -0.4679 -1.2 5.1 GX 5-1
270.4070 -25.8740 8.6 26.0 109.8 0.4892 1.4 9.7 GRS 1758-258
273.9732 -14.1682 7.6 28.3 83.4 -0.6906 -1.5 8.1 GX 17+2
276.0897 -30.2121 0.0 32.2 114.9 0.5359 1.1 12.6 H1820-303
285.0259 -25.0430 28.4 38.8 103.1 0.3077 0.4 7.4 HT1900.1-2455
262.9494 -33.6931 3.7 24.4 133.4 0.9877 3.2 8.7 GX 354-0
261.6922 -16.1575 0.4 16.3 86.7 8.6905 30.1 ------ UNKNOWN
251.2801 -26.1910 2.5 12.2 143.5 1.1439 4.6 ------ UNKNOWN
215.2595 25.3590 3.1 50.0 -43.1 4.1915 3.7 ------ UNKNOWN
211.2348 17.9928 2.9 47.1 -53.4 4.7555 3.9 ------ UNKNOWN
198.7605 -24.0053 4.3 43.9 -116.2 3.2646 2.7 ------ UNKNOWN
Plot creation:
Tue Sep 19 01:35:41 EDT 2023