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
272.1552 -20.4194 0.0026 30.5 -154.0 15.6800 72.7 TRIG_01159327
------------------------------------------
Foreground time interval of the image:
-0.072 0.496 (delta_t = 0.568 [sec])
Background time interval of the image:
-218.231 -0.072 (delta_t = 218.159 [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 0.032000
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 0.032000
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 0.032000
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 -0.072 sec. to 0.496 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.37684 ( )
Norm@50keV : 0.901915 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 969.11 using 59 PHA bins.
# Reduced chi-squared = 17.002 for 57 degrees of freedom
# Null hypothesis probability = 4.710922e-166
Photon flux (15-150 keV) in 0.568 sec: 330.491 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 7.49112e-06 ( 0 0 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.072 sec. to 0.496 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.331974 ( -0.238754 0.228358 )
Epeak [keV] : 25.2081 ( -1.67934 1.50871 )
Norm@50keV : 37.0102 ( -8.96074 12.5033 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.10 using 59 PHA bins.
# Reduced chi-squared = 0.8589 for 56 degrees of freedom
# Null hypothesis probability = 7.645901e-01
Photon flux (15-150 keV) in 0.568 sec: 255.692 ( -8.869 8.978 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.56801e-06 ( 0 0 ) ergs/cm2
Band function
Time interval is from -0.072 sec. to 0.496 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.276359 ( -0.303184 0.364037 )
beta : -5.93410 ( -1.54098 0.531238 )
Epeak [keV] : 25.3665 ( -1.72526 1.56531 )
Norm@50keV : 40.3197 ( -19.1649 25.0783 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.28 using 59 PHA bins.
# Reduced chi-squared = 0.8233 for 55 degrees of freedom
# Null hypothesis probability = 8.220041e-01
Photon flux (15-150 keV) in 0.568 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] : 8.39504 ( )
R^2/D10^2 : 222.391 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 201.91 using 59 PHA bins.
# Reduced chi-squared = 3.5422 for 57 degrees of freedom
# Null hypothesis probability = 4.438634e-18
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.665e-06 5.907e-08
25- 50 3.162e-06 6.589e-08
50-150 9.707e-07 3.294e-08
15-150 5.798e-06 1.272e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 23.6688 ( )
Norm : 2946.25 ( )
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.954e-06 9.145e-08
25- 50 2.921e-06 5.907e-08
50-150 1.145e-06 3.607e-08
15-150 7.020e-06 1.505e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.24309 (-0.530867 0.480812)
R1^2/D10^2 : 594.650 (-122.857 192.994)
kT2 [keV] : 11.6812 (-0.895984 1.17084)
R2^2/D10^2 : 21.9234 (-11.0435 17.5255)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.206e-06 1.673e-07
25- 50 3.099e-06 1.548e-07
50-150 1.096e-06 1.380e-07
15-150 6.401e-06 3.948e-07
Peak spectrum fit
Power-law model
Time interval is from -0.286 sec. to 0.714 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.31669 ( )
Norm@50keV : 0.531823 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 847.56 using 59 PHA bins.
# Reduced chi-squared = 14.869 for 57 degrees of freedom
# Null hypothesis probability = 2.963120e-141
Photon flux (15-150 keV) in 1 sec: 185.836 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 7.51459e-06 ( 0 0 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.286 sec. to 0.714 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.341120 ( -0.245592 0.234914 )
Epeak [keV] : 25.1766 ( -1.72216 1.53851 )
Norm@50keV : 20.7370 ( -5.17249 7.28609 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.85 using 59 PHA bins.
# Reduced chi-squared = 0.8365 for 56 degrees of freedom
# Null hypothesis probability = 8.032477e-01
Photon flux (15-150 keV) in 1 sec: 145.278 ( -5.072 5.135 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.57102e-06 ( 0 0 ) ergs/cm2
Band function
Time interval is from -0.286 sec. to 0.714 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.303186 ( -0.320288 0.417825 )
beta : -5.66854 ( -1.07391 0.510911 )
Epeak [keV] : 25.2138 ( -1.7351 1.51579 )
Norm@50keV : 22.1348 ( -12.0319 15.9867 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.40 using 59 PHA bins.
# Reduced chi-squared = 0.7890 for 55 degrees of freedom
# Null hypothesis probability = 8.709044e-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] : 8.37680 ( )
R^2/D10^2 : 127.628 ( )
(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 1.672e-06 6.350e-08
25- 50 3.165e-06 6.750e-08
50-150 9.648e-07 3.390e-08
15-150 5.802e-06 1.165e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 23.8665 (-0.551446 0.565617)
Norm : 1653.66 (-70.9787 74.0575)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.936e-06 9.250e-08
25- 50 2.919e-06 6.100e-08
50-150 1.159e-06 4.000e-08
15-150 7.014e-06 1.365e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.24469 (-0.548604 0.492943)
R1^2/D10^2 : 338.891 (-71.149 113.212)
kT2 [keV] : 11.7488 (-0.95963 1.29023)
R2^2/D10^2 : 12.0878 (-6.39359 10.409)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.208e-06 1.505e-07
25- 50 3.097e-06 1.850e-07
50-150 1.101e-06 1.403e-07
15-150 6.406e-06 4.470e-07
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: 3.37684 ( )
Norm@50keV : 0.901915 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 969.11 using 59 PHA bins.
# Reduced chi-squared = 17.002 for 57 degrees of freedom
# Null hypothesis probability = 4.710922e-166
Photon flux (15-150 keV) in 0.568 sec: 330.491 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 7.49112e-06 ( 0 0 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.331974 ( -0.238754 0.228358 )
Epeak [keV] : 25.2081 ( -1.67934 1.50871 )
Norm@50keV : 37.0102 ( -8.96074 12.5033 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.10 using 59 PHA bins.
# Reduced chi-squared = 0.8589 for 56 degrees of freedom
# Null hypothesis probability = 7.645901e-01
Photon flux (15-150 keV) in 0.568 sec: 255.692 ( -8.869 8.978 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.56801e-06 ( 0 0 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.276359 ( -0.303184 0.364037 )
beta : -5.93410 ( -1.54098 0.531238 )
Epeak [keV] : 25.3665 ( -1.72526 1.56189 )
Norm@50keV : 40.3197 ( -19.1649 25.0783 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.28 using 59 PHA bins.
# Reduced chi-squared = 0.8233 for 55 degrees of freedom
# Null hypothesis probability = 8.220041e-01
Photon flux (15-150 keV) in 0.568 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) = 2.38e-06
S(50-100 keV) = 9.16e-07
T90 vs. Hardness ratio plot
T90 = 0.447999954223633 sec.
Hardness ratio (energy fluence ratio) = 0.384874
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.974426
Count Ratio (50-100 keV) / (15-25 keV) = 0.188125
Mask shadow pattern
IMX = -5.302697819416252E-01, IMY = 2.589647467369287E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.032000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.032000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.032000
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:
-218.231400 -0.072000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.1186 -60.6063 8.2 47.5 27.2 1.0107 1.4 5.9 Cen X-3
186.6793 -62.9037 5.3 39.3 26.7 1.1791 2.2 8.0 GX 301-2
244.9664 -15.6487 0.8 30.9 153.2 6.3025 13.6 0.9 Sco X-1
255.9798 -37.8487 0.5 8.7 -171.3 7.5386 21.4 0.4 4U 1700-377
256.6225 -36.4220 26.6 10.2 -171.3 0.1455 0.4 9.0 GX 349+2
263.0123 -24.7674 100.7 23.1 -167.1 0.0421 0.1 1.3 GX 1+4
264.5405 -44.3796 5.1 9.2 -109.5 0.8320 2.3 9.7 4U 1735-44
268.4403 -1.3598 9.4 47.0 -170.9 0.9164 1.2 7.1 SW J1753.5-0127
270.3272 -25.0192 3.3 25.7 -152.3 1.2894 3.5 4.3 GX 5-1
270.1497 -25.5828 0.0 25.1 -151.9 0.4566 1.3 12.7 GRS 1758-258
273.8825 -14.1569 10.1 36.9 -156.5 0.5708 1.1 10.2 GX 17+2
275.8980 -30.5100 19.7 24.3 -135.1 0.2373 0.6 8.7 H1820-303
284.8914 -24.7857 17.2 33.9 -131.2 -0.3775 -0.7 11.3 HT1900.1-2455
263.0644 -33.8065 18.1 14.9 -154.7 -0.2443 -0.6 4.1 GX 354-0
254.1045 -19.5802 2.8 26.5 171.0 1.6066 4.1 ------ UNKNOWN
248.4901 -47.3661 2.2 2.6 42.9 1.8775 5.3 ------ UNKNOWN
194.4147 -84.4063 2.7 41.2 -6.9 2.2276 4.3 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-0.072000 0.496000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.5659 -60.7053 8.1 47.2 27.2 0.6198 1.4 8.9 Cen X-3
186.5157 -62.7601 29.6 39.4 26.9 0.1201 0.4 3.9 GX 301-2
245.0198 -15.7838 4.1 30.7 153.3 -0.6639 -2.8 8.9 Sco X-1
255.8640 -37.6719 35.0 8.9 -172.3 0.0590 0.3 11.9 4U 1700-377
256.3677 -36.5430 26.5 10.1 -172.2 -0.0804 -0.4 7.9 GX 349+2
262.9717 -24.7043 48.1 23.1 -167.2 0.0411 0.2 3.2 GX 1+4
264.5508 -44.2890 0.0 9.2 -110.0 0.0977 0.5 12.7 4U 1735-44
268.3152 -1.4783 4.3 46.8 -171.0 -0.8586 -2.7 3.5 SW J1753.5-0127
270.1665 -25.1864 6.3 25.5 -152.4 0.3413 1.8 9.1 GX 5-1
270.2860 -25.8819 5.0 25.0 -151.3 0.4338 2.3 8.4 GRS 1758-258
274.1377 -14.0898 9.7 37.0 -156.2 -0.3019 -1.2 8.3 GX 17+2
275.9390 -30.5109 5.2 24.3 -135.0 -0.4709 -2.2 8.7 H1820-303
285.0028 -25.0570 7.6 33.8 -130.8 0.4288 1.5 8.4 HT1900.1-2455
262.9871 -33.8315 27.9 14.9 -154.8 -0.0695 -0.4 0.2 GX 354-0
238.0537 -20.5053 2.9 27.8 137.7 0.9352 3.9 ------ UNKNOWN
158.9627 -66.8564 2.6 49.6 17.0 1.8916 4.4 ------ UNKNOWN
145.0273 -71.6117 2.2 51.7 8.6 2.6111 5.3 ------ UNKNOWN
215.9415 -80.3806 2.8 36.6 -4.6 0.9783 4.2 ------ UNKNOWN
272.1552 -20.4194 0.2 30.5 -154.0 15.6804 72.7 ------ UNKNOWN
326.3966 -60.3260 2.5 44.3 -57.1 3.2867 4.5 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
960.568590 962.663700
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.4365 35.3055 24.5 33.6 103.0 -0.0163 -0.5 2.4 Her X-1
263.0668 -24.8913 8.9 50.9 8.0 -0.0651 -1.3 9.3 GX 1+4
268.5344 -1.3591 0.0 28.6 23.0 0.0397 1.7 11.4 SW J1753.5-0127
270.3757 -25.1350 9.2 48.1 0.1 -0.0508 -1.3 6.0 GX 5-1
270.3963 -25.7331 32.3 48.6 -0.3 -0.0147 -0.4 5.1 GRS 1758-258
274.0736 -14.2030 7.6 36.6 1.6 0.0411 1.5 10.7 GX 17+2
275.8134 -30.3595 3.3 51.5 -8.1 0.1615 3.5 5.8 H1820-303
285.0875 -24.8768 5.7 44.7 -17.8 -0.0696 -2.0 3.8 HT1900.1-2455
288.8621 11.0817 5.3 8.6 -25.9 -0.0423 -2.2 9.0 GRS 1915+105
299.7293 35.1105 2.2 18.5 -170.9 0.1001 5.1 8.7 Cyg X-1
308.0784 40.9612 3.0 27.2 -167.7 0.0855 3.8 1.5 Cyg X-3
326.1352 38.2850 9.2 37.6 -149.7 0.0373 1.2 2.8 Cyg X-2
312.8799 50.7689 2.7 36.7 -175.7 0.1142 4.3 ------ UNKNOWN
Plot creation:
Sat Mar 11 14:26:10 EST 2023