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
245.3915 -15.8945 0.0149 34.0 159.2 10.3205 13.0 TRIG_01213872
------------------------------------------
Foreground time interval of the image:
-12.099 124.080 (delta_t = 136.179 [sec])
125.000 255.501 (delta_t = 130.501 [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
-106.516000 124.080000
125.000000 788.200000
789.000000 794.910000
802.000000 811.390000
814.000000 854.140000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 6.94973 ( )
Norm@50keV : 4.27484E-05 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 161.24 using 59 PHA bins.
# Reduced chi-squared = 2.8288 for 57 degrees of freedom
# Null hypothesis probability = 6.807589e-12
Photon flux (15-150 keV) in 949.2 sec: 0.463862 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.27175e-05 ( 0 0 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-106.516000 124.080000
125.000000 788.200000
789.000000 794.910000
802.000000 811.390000
814.000000 854.140000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 6.11770E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 772.74 using 59 PHA bins.
# Reduced chi-squared = 13.799 for 56 degrees of freedom
# Null hypothesis probability = 1.108354e-126
Photon flux (15-150 keV) in 949.2 sec: 0.416400 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.15614e-05 ( 0 0 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-106.516000 124.080000
125.000000 788.200000
789.000000 794.910000
802.000000 811.390000
814.000000 854.140000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.01487 ( )
beta : -6.99669 ( )
Epeak [keV] : 9983.82 ( )
Norm@50keV : 5.55770E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 161.33 using 59 PHA bins.
# Reduced chi-squared = 2.9332 for 55 degrees of freedom
# Null hypothesis probability = 2.213682e-12
Photon flux (15-150 keV) in 949.2 sec: 0.254569 ( 6.74543 -0.254569 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.42748e-06 ( -6.42083e-06 -6.42748e-06 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 2.40550 ( )
R^2/D10^2 : 289.177 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 115.78 using 59 PHA bins.
# Reduced chi-squared = 2.0312 for 57 degrees of freedom
# Null hypothesis probability = 6.920590e-06
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.133e-05 1.446e-06
25- 50 7.107e-07 9.914e-08
50-150 1.528e-10 7.998e-11
15-150 1.204e-05 1.433e-06
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 3.89148 ( )
Norm : 288.073 ( )
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.167e-05 1.376e-06
25- 50 7.884e-07 1.184e-07
50-150 9.754e-10 5.292e-10
15-150 1.245e-05 1.547e-06
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.41401 ( )
R1^2/D10^2 : 138.192 ( )
kT2 [keV] : 2.39770 ( )
R2^2/D10^2 : 150.979 ( )
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.133e-05 4.751e+03
25- 50 7.112e-07 3.736e+04
50-150 1.532e-10 1.052e+06
15-150 1.204e-05 9.421e+05
Peak spectrum fit
Power-law model
Time interval is from 702.420 sec. to 703.420 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 5.16646 ( -1.58241 1.98964 )
Norm@50keV : 3.94780E-04 ( -0.000393892 0.00141537 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.16 using 59 PHA bins.
# Reduced chi-squared = 0.8448 for 57 degrees of freedom
# Null hypothesis probability = 7.916516e-01
Photon flux (15-150 keV) in 1 sec: 0.714542 ( -0.197699 0.198044 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.2576e-08 ( -7.3746e-09 9.30688e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 702.420 sec. to 703.420 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.79345 ( )
Epeak [keV] : 1.10495 ( )
Norm@50keV : 0.374902 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.27 using 59 PHA bins.
# Reduced chi-squared = 0.8799 for 56 degrees of freedom
# Null hypothesis probability = 7.255714e-01
Photon flux (15-150 keV) in 1 sec: 0.702688 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.21367e-08 ( -6.9798e-09 9.7529e-09 ) ergs/cm2
Band function
Time interval is from 702.420 sec. to 703.420 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -3.18451 ( 0.999248 3.21818 )
beta : -5.06014 ( 0.934144 -2.12792 )
Epeak [keV] : 373.228 ( -373.228 -373.228 )
Norm@50keV : 1.35762 ( 421.114 -1.4399 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.17 using 59 PHA bins.
# Reduced chi-squared = 0.8758 for 55 degrees of freedom
# Null hypothesis probability = 7.311638e-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] : 2.50923 (-0.72204 0.971196)
R^2/D10^2 : 328.847 (-329.899 4430.92)
(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 1.853e-08 1.020e-08
25- 50 1.382e-09 8.405e-10
50-150 4.528e-13 5.800e-13
15-150 1.991e-08 1.141e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 4.81130 (-1.89874 3.66537)
Norm : 183.197 (-183.202 1438.4)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.843e-08 1.052e-08
25- 50 2.132e-09 1.351e-09
50-150 9.071e-12 1.099e-11
15-150 2.057e-08 1.210e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.27149 (-0.675975 0.888657)
R1^2/D10^2 : 645.537 (-579.544 12114.7)
kT2 [keV] : 25.1148 (-11.8063 50.6644)
R2^2/D10^2 : 6.42816E-03 (-0.0061189 0.0462112)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.784e-08 1.003e-08
25- 50 4.837e-09 2.807e-09
50-150 1.868e-08 1.345e-08
15-150 4.135e-08 2.363e-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: 5.95533 ( -0.365088 0.371142 )
Norm@50keV : 1.13239E-04 ( -3.31688e-05 4.35782e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.44 using 59 PHA bins.
# Reduced chi-squared = 0.8499 for 57 degrees of freedom
# Null hypothesis probability = 7.829019e-01
Photon flux (15-150 keV) in 266.7 sec: 0.445590 ( -0.0397722 0.0400155 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.57727e-06 ( -2.94325e-07 2.95488e-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 : 2.23063E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 365.57 using 59 PHA bins.
# Reduced chi-squared = 6.5281 for 56 degrees of freedom
# Null hypothesis probability = 5.261944e-47
Photon flux (15-150 keV) in 266.7 sec: 0.430653 ( -0.044801 0.043834 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.41325e-06 ( -3.28468e-07 3.21293e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -7.68165 ( 4.23491 7.68165 )
beta : -5.99719 ( -0.340602 0.39947 )
Epeak [keV] : 409.317 ( -409.317 -409.317 )
Norm@50keV : 1.47922E-02 ( -0.00416246 0.00629746 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.48 using 59 PHA bins.
# Reduced chi-squared = 0.8815 for 55 degrees of freedom
# Null hypothesis probability = 7.202735e-01
Photon flux (15-150 keV) in 266.7 sec: 0.254569 ( 6.74543 -0.254569 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.80595e-06 ( -1.80408e-06 -1.80595e-06 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 9.82e-07
S(50-100 keV) = 3.18e-08
T90 vs. Hardness ratio plot
T90 = 751.12399995327 sec.
Hardness ratio (energy fluence ratio) = 0.0323829
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.0321297
Count Ratio (50-100 keV) / (15-25 keV) = -0.0157799
Mask shadow pattern
IMX = -6.299237109718862E-01, IMY = -2.393040883726813E-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:
-12.099370 117.832000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.5638 -60.6843 4.8 46.9 39.1 -2.2042 -2.4 8.2 Cen X-3
186.6515 -62.9315 22.1 39.0 39.6 -0.3146 -0.5 9.7 GX 301-2
245.1464 -15.5077 0.0 34.4 158.9 0.0639 0.2 12.5 Sco X-1
255.8601 -37.7431 10.2 11.1 177.8 -0.2761 -1.1 8.5 4U 1700-377
256.2474 -36.5299 72.2 12.3 179.2 -0.0394 -0.2 11.1 GX 349+2
262.8537 -24.5972 25.5 24.8 -167.2 0.1194 0.4 12.3 GX 1+4
264.9659 -44.5778 12.9 7.6 -123.0 -0.2530 -0.9 12.2 4U 1735-44
268.2994 -1.4335 15.4 48.6 -166.0 -0.4411 -0.7 4.3 SW J1753.5-0127
270.1527 -25.2139 3.8 26.2 -152.1 0.8223 3.0 10.8 GX 5-1
270.1728 -25.8979 0.0 25.5 -151.4 -0.3935 -1.5 11.6 GRS 1758-258
273.9081 -14.1843 0.0 37.7 -153.2 -0.4799 -1.3 10.5 GX 17+2
276.0619 -30.4923 10.5 23.9 -135.2 -0.3234 -1.1 10.3 H1820-303
284.9631 -24.9465 7.9 33.0 -128.5 0.5175 1.5 4.3 HT1900.1-2455
262.9284 -33.9852 13.8 15.8 -160.3 -0.2279 -0.8 9.5 GX 354-0
245.3874 -15.9009 0.9 34.0 159.2 5.1852 13.8 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-12.099370 124.080000
125.000000 255.500580
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.2543 -60.5013 23.2 47.1 39.2 0.8009 0.5 7.5 Cen X-3
186.6296 -62.7698 19.1 39.0 39.9 -0.7489 -0.6 0.7 GX 301-2
244.9914 -15.4938 12.7 34.4 158.7 0.7406 0.9 8.8 Sco X-1
255.8052 -37.7594 15.8 11.0 177.5 -0.3557 -0.7 10.0 4U 1700-377
256.2530 -36.4272 37.3 12.4 179.2 -0.1584 -0.3 8.8 GX 349+2
262.8501 -24.5972 0.0 24.8 -167.2 0.6521 1.2 12.4 GX 1+4
264.7267 -44.4624 32.9 7.6 -124.5 0.1958 0.3 1.0 4U 1735-44
268.3660 -1.3994 8.8 48.6 -165.9 -1.5860 -1.3 3.2 SW J1753.5-0127
270.1555 -25.2303 4.8 26.1 -152.0 1.3243 2.4 11.5 GX 5-1
270.1728 -25.8979 0.0 25.5 -151.4 -0.4919 -0.9 11.6 GRS 1758-258
274.0346 -14.0818 119.6 37.9 -153.0 0.0724 0.1 3.2 GX 17+2
275.8224 -30.2337 22.8 24.0 -136.0 0.2836 0.5 9.6 H1820-303
285.0179 -24.9606 8.3 33.0 -128.4 1.0146 1.4 2.6 HT1900.1-2455
263.1659 -33.8703 17.3 15.9 -159.7 0.3537 0.7 9.1 GX 354-0
235.1136 -19.7092 2.5 33.5 140.2 3.6527 4.6 ------ UNKNOWN
245.3909 -15.8946 0.9 34.0 159.2 10.2387 13.0 ------ UNKNOWN
7.6221 -64.2259 2.0 55.2 -32.3 15.1531 5.7 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
327.900600 788.200000
789.000000 794.910000
802.000000 811.390000
814.000000 903.200000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.8608 -15.7353 3.6 0.5 97.5 -12.1671 -3.2 8.9 Sco X-1
254.5809 35.3642 10.4 52.0 178.5 12.5418 1.1 6.2 Her X-1
255.9843 -37.8524 7.0 23.9 -32.1 -6.5053 -1.7 0.5 4U 1700-377
256.5578 -36.2832 185.3 22.7 -34.9 -0.2385 -0.1 10.3 GX 349+2
263.1888 -24.6133 0.0 18.8 -70.6 -4.9048 -1.1 12.6 GX 1+4
264.9206 -44.5383 7.7 33.0 -37.0 7.4480 1.5 9.3 4U 1735-44
268.3091 -1.2976 4.6 26.9 -131.7 11.6510 2.5 9.9 SW J1753.5-0127
270.1254 -24.9880 14.1 24.8 -75.6 4.1668 0.8 10.2 GX 5-1
270.2198 -25.8793 11.1 25.2 -73.6 5.3938 1.0 9.3 GRS 1758-258
273.8466 -14.1573 0.0 27.5 -100.9 -15.2932 -2.7 11.8 GX 17+2
276.0839 -30.4835 95.8 31.6 -68.1 0.8186 0.1 10.8 H1820-303
285.0017 -25.0433 12.6 38.1 -80.6 12.0445 0.9 7.6 HT1900.1-2455
263.1460 -33.9794 0.0 24.1 -49.3 4.3716 1.0 11.7 GX 354-0
213.5894 -18.0676 3.2 30.5 70.2 21.0905 3.6 ------ UNKNOWN
218.3312 -35.6392 2.3 31.2 34.6 26.3770 5.0 ------ UNKNOWN
289.4603 -41.4565 3.2 45.6 -57.9 64.0406 3.6 ------ UNKNOWN
Plot creation:
Fri Feb 9 14:56:29 EST 2024