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
298.6025 +35.6672 0.0167 48.8 -171.9 9.7493 11.6 TRIG_01218398
------------------------------------------
Foreground time interval of the image:
-143.460 -141.820 (delta_t = 1.640 [sec])
-141.000 -124.200 (delta_t = 16.800 [sec])
-123.000 -56.240 (delta_t = 66.760 [sec])
-55.000 27.060 (delta_t = 82.060 [sec])
28.000 136.601 (delta_t = 108.601 [sec])
Background time interval of the image:
-240.000 -143.460 (delta_t = 96.540 [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
Multiple GTIs in the spectrum
tstart tstop
-143.460000 -141.820100
-141.000000 -124.200000
-123.000000 -56.239900
-55.000000 27.060000
28.000000 163.344000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.81028 ( -0.114056 0.115359 )
Norm@50keV : 2.57337E-03 ( -0.000172716 0.000171905 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.08 using 59 PHA bins.
# Reduced chi-squared = 0.8786 for 57 degrees of freedom
# Null hypothesis probability = 7.301074e-01
Photon flux (15-150 keV) in 302.6 sec: 0.356028 ( -0.0246473 0.0247366 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.16632e-06 ( -4.86666e-07 4.881e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-143.460000 -141.820100
-141.000000 -124.200000
-123.000000 -56.239900
-55.000000 27.060000
28.000000 163.344000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.53171 ( -0.477591 0.361156 )
Epeak [keV] : 82.7213 ( -26.8752 -82.7228 )
Norm@50keV : 3.57489E-03 ( -0.00120237 0.00262799 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.89 using 59 PHA bins.
# Reduced chi-squared = 0.8730 for 56 degrees of freedom
# Null hypothesis probability = 7.386006e-01
Photon flux (15-150 keV) in 302.6 sec: 0.350959 ( -0.025805 0.02587 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.03772e-06 ( -5.32546e-07 5.29126e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-143.460000 -141.820100
-141.000000 -124.200000
-123.000000 -56.239900
-55.000000 27.060000
28.000000 163.344000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.94337 ( -6.30346 -4.94337 )
beta : -1.89298 ( -0.134583 0.129177 )
Epeak [keV] : 23.5577 ( -4.69877 3.64315 )
Norm@50keV : 463.710 ( -29.6886 1764.95 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.06 using 59 PHA bins.
# Reduced chi-squared = 0.8194 for 55 degrees of freedom
# Null hypothesis probability = 8.280803e-01
Photon flux (15-150 keV) in 302.6 sec: 0.369518 ( 6.63048 -0.039881 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.0569e-06 ( -7.05479e-06 -5.04192e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 12.7782 (-1.03751 1.13984)
R^2/D10^2 : 6.59771E-02 (-0.0182717 0.0250492)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 110.27 using 59 PHA bins.
# Reduced chi-squared = 1.9346 for 57 degrees of freedom
# Null hypothesis probability = 2.963708e-05
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.914e-07 9.002e-08
25- 50 2.337e-06 2.092e-07
50-150 2.388e-06 3.091e-07
15-150 5.417e-06 4.206e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 108.845 (-23.3602 34.4943)
Norm : 1.52719 (-0.140821 0.163323)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.207e-06 1.319e-07
25- 50 2.122e-06 1.560e-07
50-150 3.602e-06 1.024e-06
15-150 6.931e-06 1.145e-06
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.38825 (-1.23269 1.30499)
R1^2/D10^2 : 0.379247 (-0.162023 0.343078)
kT2 [keV] : 27.9056 (-6.11595 11.7255)
R2^2/D10^2 : 2.59325E-03 (-0.00180014 0.0040857)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.161e-06 2.285e-07
25- 50 2.206e-06 4.308e-07
50-150 3.689e-06 1.727e-06
15-150 7.056e-06 1.958e-06
Peak spectrum fit
Power-law model
Time interval is from -24.548 sec. to -23.548 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.11121 ( -0.713592 0.849203 )
Norm@50keV : 6.56927E-03 ( -0.00324139 0.00296738 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.88 using 59 PHA bins.
# Reduced chi-squared = 1.121 for 57 degrees of freedom
# Null hypothesis probability = 2.476701e-01
Photon flux (15-150 keV) in 1 sec: 1.03927 ( -0.410734 0.412914 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.11038e-08 ( -2.56929e-08 2.65715e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -24.548 sec. to -23.548 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.24869 ( -7.61856 0.111094 )
Epeak [keV] : 111.722 ( )
Norm@50keV : 5.46591E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.84 using 59 PHA bins.
# Reduced chi-squared = 1.140 for 56 degrees of freedom
# Null hypothesis probability = 2.202447e-01
Photon flux (15-150 keV) in 1 sec: 1.04138 ( -0.412542 0.40474 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.08712e-08 ( -3.14387e-08 2.65384e-08 ) ergs/cm2
Band function
Time interval is from -24.548 sec. to -23.548 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.554057 ( 1.48352 1.48352 )
beta : -2.79136 ( 2.33881 0.911426 )
Epeak [keV] : 33.1130 ( -28.0326 -28.0326 )
Norm@50keV : 0.313783 ( -0.336296 324.675 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.39 using 59 PHA bins.
# Reduced chi-squared = 1.153 for 55 degrees of freedom
# Null hypothesis probability = 2.045243e-01
Photon flux (15-150 keV) in 1 sec: 0.405318 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.58071e-08 ( -2.58001e-08 -2.5812e-09 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 8.46211 (-2.56059 4.25099)
R^2/D10^2 : 0.945454 (-0.945457 3.17294)
(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 1.272e-08 7.935e-09
25- 50 2.449e-08 1.603e-08
50-150 7.711e-09 5.930e-09
15-150 4.493e-08 2.880e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 52.2996 (-33.1953 -52.2996)
Norm : 5.76223 (-3.09129 7.81026)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.423e-08 9.505e-09
25- 50 2.076e-08 1.362e-08
50-150 2.102e-08 1.634e-08
15-150 5.601e-08 3.791e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.74654 (-1.62729 10.8761)
R1^2/D10^2 : 1.26629 (-1577.99 -1577.99)
kT2 [keV] : 200.000 (-200 -200)
R2^2/D10^2 : 9.05369E-05 (-8.31481e-05 0.000933859)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.361e-08 7.955e-09
25- 50 2.386e-08 1.566e-08
50-150 8.181e-09 6.900e-09
15-150 4.565e-08 2.869e-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: 1.78781 ( -0.11738 0.118615 )
Norm@50keV : 2.63109E-03 ( -0.00018129 0.00018051 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.22 using 59 PHA bins.
# Reduced chi-squared = 0.8284 for 57 degrees of freedom
# Null hypothesis probability = 8.189303e-01
Photon flux (15-150 keV) in 275.9 sec: 0.360861 ( -0.0258061 0.0259019 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.68594e-06 ( -4.68269e-07 4.69642e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.52033 ( -0.490679 0.395797 )
Epeak [keV] : 88.7711 ( -30.8502 -88.773 )
Norm@50keV : 3.60292E-03 ( -0.000948854 0.00272673 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.17 using 59 PHA bins.
# Reduced chi-squared = 0.8245 for 56 degrees of freedom
# Null hypothesis probability = 8.225374e-01
Photon flux (15-150 keV) in 275.9 sec: 0.355970 ( -0.026985 0.027054 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.57288e-06 ( -5.10967e-07 5.0749e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.94821 ( -7.94604 -4.94821 )
beta : -1.86818 ( -0.137806 0.132311 )
Epeak [keV] : 23.5362 ( -4.79233 3.85466 )
Norm@50keV : 472.129 ( -31.1981 1845.57 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.44 using 59 PHA bins.
# Reduced chi-squared = 0.7716 for 55 degrees of freedom
# Null hypothesis probability = 8.922722e-01
Photon flux (15-150 keV) in 275.9 sec: 0.385604 ( 6.6144 -0.044042 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.58852e-06 ( -6.58659e-06 -4.8368e-07 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 2.03e-06
S(50-100 keV) = 2.31e-06
T90 vs. Hardness ratio plot
T90 = 217.90399992466 sec.
Hardness ratio (energy fluence ratio) = 1.13793
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.33768
Count Ratio (50-100 keV) / (15-25 keV) = 0.837439
Mask shadow pattern
IMX = -1.131723976547176E+00, IMY = 1.601553144991916E-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:
-240.000000 -143.460000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9795 -15.6402 402.3 33.0 61.3 -0.0098 -0.0 0.0 Sco X-1
256.0218 -38.0228 18.9 35.1 17.1 -0.1595 -0.6 10.8 4U 1700-377
256.6406 -36.3386 0.0 33.5 18.4 0.3037 1.3 11.1 GX 349+2
262.8146 -24.8382 0.0 21.4 27.2 0.0528 0.3 12.0 GX 1+4
264.7964 -44.5414 7.8 37.2 1.8 -0.3977 -1.5 5.9 4U 1735-44
268.4735 -1.6317 0.0 12.3 113.4 -0.4577 -2.5 12.5 SW J1753.5-0127
270.3041 -25.0235 5.1 17.5 10.4 0.3883 2.3 3.5 GX 5-1
270.1090 -25.8330 4.0 18.3 9.7 -0.5209 -2.9 11.8 GRS 1758-258
274.1041 -14.2145 32.0 6.4 24.2 0.0662 0.4 12.1 GX 17+2
275.9571 -30.2195 9.8 21.1 -8.7 0.2234 1.2 9.0 H1820-303
285.0236 -24.9295 5.9 17.0 -35.7 -0.3851 -1.9 0.9 HT1900.1-2455
288.7808 10.8284 6.7 22.6 -166.1 -0.3298 -1.7 7.1 GRS 1915+105
299.5903 35.2016 225.8 48.8 -170.7 0.0234 0.1 0.0 Cyg X-1
308.1842 40.9338 7.2 57.2 -167.4 1.3419 1.6 3.5 Cyg X-3
263.1459 -33.8644 9.3 28.3 13.0 -0.2684 -1.2 8.0 GX 354-0
243.9740 -15.0602 1.4 33.9 62.6 2.9652 8.1 ------ UNKNOWN
298.8769 35.5681 1.3 48.8 -171.6 3.9497 8.6 ------ UNKNOWN
306.9968 4.2067 3.2 31.7 -127.9 0.9594 3.6 ------ UNKNOWN
308.5287 -59.4555 2.2 55.2 -32.3 5.5329 5.3 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-143.460000 -141.820100
-141.000000 -124.200000
-123.000000 -56.239900
-55.000000 27.060000
28.000000 136.600600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
245.0628 -15.6449 285.3 33.0 61.3 -0.0301 -0.0 4.8 Sco X-1
256.1176 -37.9274 6.2 34.9 17.1 1.0174 1.8 8.0 4U 1700-377
256.5528 -36.4694 15.9 33.6 18.3 -0.3841 -0.7 6.3 GX 349+2
263.1096 -24.9331 102.8 21.3 26.5 -0.0475 -0.1 12.5 GX 1+4
264.8849 -44.5073 14.5 37.1 1.7 0.4211 0.8 7.0 4U 1735-44
268.4934 -1.5599 4.3 12.3 113.7 1.0605 2.7 9.9 SW J1753.5-0127
270.3007 -25.0637 4.4 17.6 10.3 -1.1221 -2.6 1.3 GX 5-1
270.4139 -25.6170 9.3 18.0 9.2 -0.5393 -1.3 9.7 GRS 1758-258
273.8882 -13.9817 6.3 6.4 26.9 0.7081 1.8 7.6 GX 17+2
275.9700 -30.4853 6.2 21.4 -8.8 0.8210 1.8 7.5 H1820-303
284.9156 -24.7490 0.0 16.8 -35.6 0.2147 0.5 12.2 HT1900.1-2455
288.6270 10.8365 0.0 22.6 -166.4 -0.3981 -1.0 12.0 GRS 1915+105
299.4840 35.2605 5.9 48.8 -170.8 -1.7208 -1.9 6.3 Cyg X-1
307.9659 40.8677 17.7 57.1 -167.5 1.3950 0.7 8.3 Cyg X-3
263.1443 -33.8683 4.8 28.3 13.0 1.0823 2.4 8.0 GX 354-0
243.7182 -14.9636 1.0 34.2 62.8 8.8240 11.0 ------ UNKNOWN
259.6950 19.7175 2.7 34.2 133.8 2.9098 4.3 ------ UNKNOWN
298.6039 35.6667 1.0 48.8 -171.9 9.8160 11.6 ------ UNKNOWN
286.4350 -23.7976 2.3 16.6 -41.4 1.9770 5.1 ------ UNKNOWN
302.9638 -25.8534 2.2 28.8 -65.6 2.7967 5.3 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
231.500590 303.089700
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.2871 35.4141 10.9 35.8 67.9 0.3527 1.1 9.4 Her X-1
268.3866 -1.3903 4.7 46.6 8.8 0.6154 2.4 3.9 SW J1753.5-0127
274.0634 -14.1093 13.2 54.9 -5.6 -0.3598 -0.9 5.5 GX 17+2
288.6951 10.9736 7.6 26.3 -12.5 -0.2134 -1.5 6.3 GRS 1915+105
299.3343 35.1669 0.0 0.7 -85.6 0.1793 1.3 12.7 Cyg X-1
308.3162 41.0155 6.3 9.3 -163.4 -0.2385 -1.8 10.1 Cyg X-3
326.0212 38.2364 3.9 22.0 -140.1 -0.4363 -2.9 8.7 Cyg X-2
246.9753 62.4492 3.2 41.4 111.7 2.3902 3.6 ------ UNKNOWN
15.2798 74.6279 2.2 52.3 163.9 2.7077 5.2 ------ UNKNOWN
298.5951 35.6661 0.6 0.1 94.5 2.8734 20.8 ------ UNKNOWN
332.6399 27.4889 2.2 29.9 -119.0 0.9939 5.3 ------ UNKNOWN
Plot creation:
Sun Mar 3 19:04:58 EST 2024