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
298.5268 +35.6962 0.0073 0.1 88.6 16.7686 26.3 TRIG_01218399
------------------------------------------
Foreground time interval of the image:
-176.499 -143.960 (delta_t = 32.539 [sec])
-143.000 -93.100 (delta_t = 49.900 [sec])
-92.000 -52.990 (delta_t = 39.010 [sec])
-52.000 260.000 (delta_t = 312.000 [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
-190.000000 -143.960000
-143.000000 -93.100000
-92.000000 -52.990000
-52.000000 260.000000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.79418 ( -0.0532187 0.0535079 )
Norm@50keV : 2.36417E-03 ( -6.66066e-05 6.64876e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.58 using 59 PHA bins.
# Reduced chi-squared = 1.045 for 57 degrees of freedom
# Null hypothesis probability = 3.818884e-01
Photon flux (15-150 keV) in 447 sec: 0.325047 ( -0.00979918 0.00983478 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.73092e-06 ( -2.79405e-07 2.79957e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-190.000000 -143.960000
-143.000000 -93.100000
-92.000000 -52.990000
-52.000000 260.000000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.41018 ( -0.230115 0.218821 )
Epeak [keV] : 77.3214 ( -12.2875 35.902 )
Norm@50keV : 3.64663E-03 ( -0.000779753 0.00105681 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.30 using 59 PHA bins.
# Reduced chi-squared = 0.8982 for 56 degrees of freedom
# Null hypothesis probability = 6.894427e-01
Photon flux (15-150 keV) in 447 sec: 0.315018 ( -0.00559 0.011184 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.41212e-06 ( -3.31629e-07 3.3145e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-190.000000 -143.960000
-143.000000 -93.100000
-92.000000 -52.990000
-52.000000 260.000000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.41122 ( -0.216516 0.153949 )
beta : -9.10875 ( 9.26584 19.2658 )
Epeak [keV] : 77.4010 ( -10.1604 18.5985 )
Norm@50keV : 3.64146E-03 ( -0.000748954 0.000796886 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.30 using 59 PHA bins.
# Reduced chi-squared = 0.9146 for 55 degrees of freedom
# Null hypothesis probability = 6.544290e-01
Photon flux (15-150 keV) in 447 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 9.40676e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.5351 ( )
R^2/D10^2 : 4.72609E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 302.14 using 59 PHA bins.
# Reduced chi-squared = 5.3007 for 57 degrees of freedom
# Null hypothesis probability = 4.432146e-35
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.196e-07 4.537e-08
25- 50 2.946e-06 9.968e-08
50-150 3.491e-06 2.016e-07
15-150 7.256e-06 2.302e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 117.275 (-15.2556 13.5707)
Norm : 1.34720 (-0.0500296 0.0689561)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.629e-06 1.044e-07
25- 50 2.862e-06 1.198e-07
50-150 4.851e-06 1.110e-06
15-150 9.342e-06 1.158e-06
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.54425 (-0.681388 0.72973)
R1^2/D10^2 : 0.450396 (-0.140271 0.228304)
kT2 [keV] : 22.1217 (-1.96769 2.55137)
R2^2/D10^2 : 5.95258E-03 (-0.00210186 0.00273146)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.525e-06 1.433e-07
25- 50 2.814e-06 1.678e-07
50-150 4.862e-06 4.345e-07
15-150 9.200e-06 5.722e-07
Peak spectrum fit
Power-law model
Time interval is from 63.000 sec. to 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.06633 ( -0.462648 0.55496 )
Norm@50keV : 3.76138E-03 ( -0.00139767 0.00132407 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.60 using 59 PHA bins.
# Reduced chi-squared = 0.8175 for 57 degrees of freedom
# Null hypothesis probability = 8.357154e-01
Photon flux (15-150 keV) in 1 sec: 0.582120 ( -0.14794 0.147998 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.48422e-08 ( -1.12117e-08 1.1965e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 63.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.84125 ( -2.27721 0.267092 )
Epeak [keV] : 27.9454 ( )
Norm@50keV : 5.15078E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.54 using 59 PHA bins.
# Reduced chi-squared = 0.8310 for 56 degrees of freedom
# Null hypothesis probability = 8.122408e-01
Photon flux (15-150 keV) in 1 sec: 0.578893 ( -0.147634 0.14924 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.39824e-08 ( -1.2235e-08 1.26444e-08 ) ergs/cm2
Band function
Time interval is from 63.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.98693 ( -6.6737 1.98692 )
beta : -9.37162 ( 9.37167 19.3717 )
Epeak [keV] : 7.17164 ( -6.3759 -7.05613 )
Norm@50keV : 4.17630E-03 ( -0.00123427 0.215462 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.57 using 59 PHA bins.
# Reduced chi-squared = 0.8466 for 55 degrees of freedom
# Null hypothesis probability = 7.837614e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.38228e-08 ( 0 0 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.66789 (-2.18683 3.66967)
R^2/D10^2 : 0.740176 (-0.73697 2.10114)
(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 7.612e-09 4.681e-09
25- 50 1.236e-08 7.540e-09
50-150 2.817e-09 2.230e-09
15-150 2.279e-08 1.340e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 57.5866 (-31.3041 114.178)
Norm : 3.12216 (-1.10576 2.04183)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.792e-09 3.445e-09
25- 50 1.171e-08 6.322e-09
50-150 1.287e-08 1.009e-08
15-150 3.237e-08 1.681e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.25486 (-2.13079 2.6733)
R1^2/D10^2 : 2.61774 (-2.07541 20.3424)
kT2 [keV] : 21.3897 (-10.6397 57.57)
R2^2/D10^2 : 1.04660E-02 (-0.0101881 0.135473)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.633e-09 5.245e-09
25- 50 1.037e-08 5.510e-09
50-150 1.622e-08 1.138e-08
15-150 3.522e-08 1.789e-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: 1.79354 ( -0.0536146 0.0539166 )
Norm@50keV : 2.36565E-03 ( -6.74498e-05 6.73249e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.74 using 59 PHA bins.
# Reduced chi-squared = 1.066 for 57 degrees of freedom
# Null hypothesis probability = 3.428303e-01
Photon flux (15-150 keV) in 433.4 sec: 0.325169 ( -0.00987978 0.00991455 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.44093e-06 ( -2.74414e-07 2.74986e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.37629 ( -0.23441 0.2227 )
Epeak [keV] : 75.0709 ( -11.1312 29.1926 )
Norm@50keV : 3.79203E-03 ( -0.000825302 0.00112586 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.09 using 59 PHA bins.
# Reduced chi-squared = 0.8945 for 56 degrees of freedom
# Null hypothesis probability = 6.969451e-01
Photon flux (15-150 keV) in 433.4 sec: 0.314402 ( -0.011205 0.011258 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.10547e-06 ( -3.25527e-07 3.25613e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.38565 ( -0.210986 0.174279 )
beta : -9.37131 ( 9.37164 19.3716 )
Epeak [keV] : 75.8763 ( -9.8673 15.6397 )
Norm@50keV : 3.74727E-03 ( -0.000782153 0.000335221 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.10 using 59 PHA bins.
# Reduced chi-squared = 0.9109 for 55 degrees of freedom
# Null hypothesis probability = 6.619807e-01
Photon flux (15-150 keV) in 433.4 sec: 0.314613 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 9.0998e-06 ( 0 0 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 2.73e-06
S(50-100 keV) = 3.15e-06
T90 vs. Hardness ratio plot
T90 = 390 sec.
Hardness ratio (energy fluence ratio) = 1.15385
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.21434
Count Ratio (50-100 keV) / (15-25 keV) = 0.742127
Mask shadow pattern
IMX = 5.221821885309541E-05, IMY = -2.071865378227748E-03
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:
-119.000000 -110.270000
-109.000000 -95.636000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.2915 35.2444 7.1 35.8 67.6 -0.2502 -1.6 10.0 Her X-1
268.3639 -1.3121 8.4 46.5 8.9 0.1661 1.4 8.4 SW J1753.5-0127
274.0659 -14.0347 8.8 54.8 -5.5 0.2678 1.3 3.5 GX 17+2
288.7665 10.7915 5.6 26.4 -12.8 -0.1338 -2.1 9.4 GRS 1915+105
299.5309 35.1760 5.6 0.9 -93.1 0.1240 2.0 3.3 Cyg X-1
308.2237 41.0118 8.1 9.2 -163.6 0.0931 1.4 6.2 Cyg X-3
326.1069 38.1441 5.0 22.0 -139.8 -0.1605 -2.3 11.1 Cyg X-2
298.5840 35.6597 0.7 0.1 85.1 0.9904 16.8 ------ UNKNOWN
354.1916 55.5310 2.3 42.2 -171.1 0.4822 5.0 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-176.499410 -143.960000
-143.000000 -93.100000
-92.000000 -52.990000
-52.000000 260.000000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.2978 35.2432 25.3 35.8 67.6 -0.7614 -0.5 9.8 Her X-1
268.2332 -1.5098 8.7 46.7 8.9 -1.3830 -1.3 8.8 SW J1753.5-0127
274.0844 -14.0790 12.2 54.9 -5.6 -1.5671 -0.9 5.2 GX 17+2
288.6474 10.9272 4.6 26.3 -12.5 -1.6136 -2.5 9.0 GRS 1915+105
299.8465 35.2357 0.0 1.1 -103.4 -0.7120 -1.1 12.7 Cyg X-1
308.3876 40.9681 0.0 9.3 -163.0 -1.1036 -1.8 12.6 Cyg X-3
326.0329 38.2238 3.4 22.0 -140.1 -2.3945 -3.4 8.8 Cyg X-2
246.9780 62.5143 3.1 41.5 111.8 12.3248 3.8 ------ UNKNOWN
252.6768 6.4463 3.0 51.2 31.4 7.5993 3.8 ------ UNKNOWN
334.1227 65.1442 2.4 36.2 169.3 4.1682 4.7 ------ UNKNOWN
298.5268 35.6962 0.4 0.1 88.6 16.7675 26.4 ------ UNKNOWN
296.2139 -19.4907 1.8 55.2 -32.3 23.8774 6.5 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
Plot creation:
Sun Mar 3 20:49:04 EST 2024