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
300.1098 +34.4695 0.0216 0.4 -76.5 3.4427 8.9 TRIG_01218501
------------------------------------------
Foreground time interval of the image:
-179.404 -176.886 (delta_t = 2.518 [sec])
-119.000 -56.160 (delta_t = 62.840 [sec])
-55.000 -44.060 (delta_t = 10.940 [sec])
-43.000 11.060 (delta_t = 54.060 [sec])
12.000 71.901 (delta_t = 59.901 [sec])
Background time interval of the image:
-239.000 -211.865 (delta_t = 27.135 [sec])
-191.000 -179.404 (delta_t = 11.596 [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
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
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 64.000000
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 64.000000
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
Multiple GTIs in the spectrum
tstart tstop
-179.404000 -176.885700
-119.000000 -56.160000
-55.000000 -44.060000
-43.000000 11.060000
12.000000 270.912000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.78929 ( -0.0555674 0.055859 )
Norm@50keV : 2.56055E-03 ( -7.52518e-05 7.50983e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.21 using 59 PHA bins.
# Reduced chi-squared = 0.7230 for 57 degrees of freedom
# Null hypothesis probability = 9.428080e-01
Photon flux (15-150 keV) in 389.3 sec: 0.351385 ( -0.0109582 0.0109967 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.18051e-06 ( -2.7549e-07 2.76115e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-179.404000 -176.885700
-119.000000 -56.160000
-55.000000 -44.060000
-43.000000 11.060000
12.000000 270.912000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.54034 ( -0.228919 0.217481 )
Epeak [keV] : 92.0614 ( -22.4658 231.405 )
Norm@50keV : 3.40142E-03 ( -0.000728744 0.000990729 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.37 using 59 PHA bins.
# Reduced chi-squared = 0.6673 for 56 degrees of freedom
# Null hypothesis probability = 9.738373e-01
Photon flux (15-150 keV) in 389.3 sec: 0.344465 ( -0.012348 0.012398 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.97815e-06 ( -3.27868e-07 3.2709e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-179.404000 -176.885700
-119.000000 -56.160000
-55.000000 -44.060000
-43.000000 11.060000
12.000000 270.912000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.778337 ( -0.558385 2.83374 )
beta : -1.88961 ( 1.88944 0.0953433 )
Epeak [keV] : 42.5014 ( -18.9469 46.176 )
Norm@50keV : 1.05907E-02 ( -0.00699339 0.796918 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 34.58 using 59 PHA bins.
# Reduced chi-squared = 0.6288 for 55 degrees of freedom
# Null hypothesis probability = 9.858369e-01
Photon flux (15-150 keV) in 389.3 sec: 0.339572 ( 6.66043 -0.013457 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.95705e-06 ( -8.95433e-06 -3.09805e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.2238 ( )
R^2/D10^2 : 5.54762E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 302.06 using 59 PHA bins.
# Reduced chi-squared = 5.2993 for 57 degrees of freedom
# Null hypothesis probability = 4.575690e-35
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.007e-07 4.496e-08
25- 50 2.808e-06 9.869e-08
50-150 3.136e-06 1.970e-07
15-150 6.745e-06 2.277e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 108.626 (-10.9367 22.7728)
Norm : 1.51074 (-0.080474 0.0574067)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.536e-06 9.635e-08
25- 50 2.699e-06 1.187e-07
50-150 4.578e-06 1.053e-06
15-150 8.814e-06 1.111e-06
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.10331 (-0.631399 0.654861)
R1^2/D10^2 : 0.389203 (-0.102591 0.153931)
kT2 [keV] : 25.3054 (-2.65158 3.48656)
R2^2/D10^2 : 3.82157E-03 (-0.00144774 0.00202787)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.411e-06 1.201e-07
25- 50 2.695e-06 1.553e-07
50-150 4.756e-06 5.022e-07
15-150 8.861e-06 7.105e-07
Peak spectrum fit
Power-law model
Time interval is from 222.952 sec. to 223.952 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.86078 ( -0.379142 0.419755 )
Norm@50keV : 4.89984E-03 ( -0.00137524 0.00132071 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.42 using 59 PHA bins.
# Reduced chi-squared = 0.9548 for 57 degrees of freedom
# Null hypothesis probability = 5.723995e-01
Photon flux (15-150 keV) in 1 sec: 0.691761 ( -0.153071 0.153072 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.50479e-08 ( -1.21108e-08 1.26993e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 222.952 sec. to 223.952 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.996981 ( )
Epeak [keV] : 46.6968 ( )
Norm@50keV : 1.60233E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.70 using 59 PHA bins.
# Reduced chi-squared = 0.9589 for 56 degrees of freedom
# Null hypothesis probability = 5.624193e-01
Photon flux (15-150 keV) in 1 sec: 0.674738 ( -0.156646 0.156855 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.09034e-08 ( -1.2815e-08 1.50016e-08 ) ergs/cm2
Band function
Time interval is from 222.952 sec. to 223.952 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.36607 ( -3.24044 -3.24044 )
beta : -2.21031 ( 2.22843 0.667357 )
Epeak [keV] : 30.4653 ( -28.3285 72.1328 )
Norm@50keV : 0.848144 ( -0.845908 199.912 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.31 using 59 PHA bins.
# Reduced chi-squared = 0.9693 for 55 degrees of freedom
# Null hypothesis probability = 5.394310e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 4.16137e-08 ( 0 0 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.97080 (-2.21398 2.9082)
R^2/D10^2 : 0.338913 (-0.210629 0.530113)
(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 6.855e-09 3.163e-09
25- 50 1.697e-08 6.387e-09
50-150 8.784e-09 4.746e-09
15-150 3.261e-08 1.272e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 78.6265 (-39.1443 -78.6265)
Norm : 3.30241 (-0.918399 1.35986)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.559e-09 2.736e-09
25- 50 1.403e-08 6.061e-09
50-150 1.958e-08 1.571e-08
15-150 4.217e-08 2.601e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.32504 (-7.45207 3.89656)
R1^2/D10^2 : 0.832245 (-0.77742 -0.77742)
kT2 [keV] : 24.7558 (-26.9907 171.697)
R2^2/D10^2 : 6.27573E-03 (-0.00445883 0.404632)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.173e-09 5.095e-09
25- 50 1.499e-08 8.665e-09
50-150 1.943e-08 1.244e-08
15-150 4.260e-08 2.203e-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: 1.74341 ( -0.068289 0.0687699 )
Norm@50keV : 2.63976E-03 ( -9.72327e-05 9.69303e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.78 using 59 PHA bins.
# Reduced chi-squared = 0.9085 for 57 degrees of freedom
# Null hypothesis probability = 6.705249e-01
Photon flux (15-150 keV) in 190.3 sec: 0.356077 ( -0.0134307 0.0134692 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.63712e-06 ( -1.7687e-07 1.77492e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.60721 ( -0.273025 0.21898 )
Epeak [keV] : 143.046 ( )
Norm@50keV : 3.08865E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.99 using 59 PHA bins.
# Reduced chi-squared = 0.9105 for 56 degrees of freedom
# Null hypothesis probability = 6.645981e-01
Photon flux (15-150 keV) in 190.3 sec: 0.352528 ( -0.014893 0.007468 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.58201e-06 ( -2.07446e-07 2.0149e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.15291 ( 1.14778 1.14778 )
beta : -1.79222 ( 1.7927 0.0986522 )
Epeak [keV] : 47.5431 ( -47.1484 -47.1484 )
Norm@50keV : 6.24785E-03 ( -0.00380355 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.45 using 59 PHA bins.
# Reduced chi-squared = 0.9173 for 55 degrees of freedom
# Null hypothesis probability = 6.489390e-01
Photon flux (15-150 keV) in 190.3 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 2.57e-06
S(50-100 keV) = 2.98e-06
T90 vs. Hardness ratio plot
T90 = 336.111999988556 sec.
Hardness ratio (energy fluence ratio) = 1.15953
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.20033
Count Ratio (50-100 keV) / (15-25 keV) = 0.728273
Mask shadow pattern
IMX = 1.452060198270648E-03, IMY = 6.056994435157240E-03
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
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:
-239.000000 -211.864800
-191.000000 -179.404000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.6334 35.2919 9.5 36.7 69.4 -0.2785 -1.2 9.1 Her X-1
268.2814 -1.3838 6.1 46.7 11.2 -0.3281 -1.9 6.6 SW J1753.5-0127
274.0030 -14.1110 6.4 54.7 -3.6 0.5233 1.8 4.5 GX 17+2
288.9573 11.0242 131.3 25.7 -9.6 0.0084 0.1 10.5 GRS 1915+105
299.4901 35.3470 13.1 0.7 121.3 -0.0776 -0.9 10.0 Cyg X-1
308.2578 40.8678 11.5 9.0 -169.9 0.0901 1.0 8.4 Cyg X-3
326.2312 38.5017 21.9 21.5 -142.7 -0.0501 -0.5 11.2 Cyg X-2
270.9338 0.6880 2.7 43.4 9.8 0.6711 4.3 ------ UNKNOWN
299.9415 34.6766 0.7 0.1 -93.4 1.4495 16.4 ------ UNKNOWN
305.3912 32.5382 2.2 5.1 -101.0 0.4412 5.1 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-179.404000 -176.885700
-119.000000 -56.160000
-55.000000 -44.060000
-43.000000 11.060000
12.000000 71.900600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.6326 35.2827 6.5 36.7 69.4 1.6707 1.8 9.3 Her X-1
268.3163 -1.3305 13.3 46.6 11.2 0.7255 0.9 8.0 SW J1753.5-0127
274.0152 -14.0380 5.6 54.6 -3.6 -2.9328 -2.1 0.6 GX 17+2
288.8651 11.0804 5.0 25.7 -9.3 -0.9711 -2.3 9.0 GRS 1915+105
299.6367 34.9929 0.0 0.3 114.6 -0.3711 -1.0 12.7 Cyg X-1
307.9528 40.9086 77.6 8.9 -171.1 0.0585 0.1 7.6 Cyg X-3
325.9488 38.3592 18.9 21.2 -142.3 -0.2502 -0.6 10.7 Cyg X-2
257.4871 -0.6303 2.6 53.0 22.6 9.4030 4.4 ------ UNKNOWN
301.9094 68.5314 3.0 33.8 146.6 2.2155 3.8 ------ UNKNOWN
319.4583 66.5713 2.3 33.8 159.1 2.7016 5.0 ------ UNKNOWN
300.1085 34.4793 1.7 0.3 -77.4 2.7746 7.2 ------ UNKNOWN
356.9609 41.7684 2.2 44.6 -151.6 4.1495 5.3 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
76.800620 171.300600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.2786 35.3582 7.4 37.1 69.8 -0.7522 -1.6 8.8 Her X-1
268.2814 -1.5125 3.2 46.8 11.3 -1.1614 -3.6 6.3 SW J1753.5-0127
274.0957 -14.0619 27.1 54.5 -3.5 0.2098 0.4 5.4 GX 17+2
288.9730 10.9662 4.1 25.7 -9.2 -0.5150 -2.8 10.4 GRS 1915+105
299.6373 35.0972 7.3 0.6 113.6 -0.2767 -1.6 6.7 Cyg X-1
308.2375 40.8366 5.9 9.0 -171.2 0.3151 2.0 9.0 Cyg X-3
326.3766 38.3522 8.5 21.5 -142.7 -0.2454 -1.4 9.8 Cyg X-2
262.3167 22.9302 2.8 34.8 45.7 1.2552 4.2 ------ UNKNOWN
300.0223 34.6180 0.6 0.0 164.5 3.9746 23.5 ------ UNKNOWN
340.2649 56.8312 2.6 35.0 -176.9 0.9846 4.4 ------ UNKNOWN
305.6128 32.4632 2.2 5.1 -101.9 0.9502 5.2 ------ UNKNOWN
Plot creation:
Mon Mar 4 19:56:17 EST 2024