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
272.1464 -20.4118 0.0095 10.0 -153.0 0.2738 20.3 TRIG_01155864
------------------------------------------
Foreground time interval of the image:
-0.024 0.096 (delta_t = 0.120 [sec])
Background time interval of the image:
-239.820 -186.040 (delta_t = 53.780 [sec])
-184.820 -81.470 (delta_t = 103.350 [sec])
-80.820 -37.716 (delta_t = 43.104 [sec])
-36.820 -0.024 (delta_t = 36.796 [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 -0.024 sec. to 0.096 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.58957 ( -0.169149 0.181515 )
Norm@50keV : 9.21739E-02 ( -0.0123412 0.0121277 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.13 using 59 PHA bins.
# Reduced chi-squared = 0.9848 for 57 degrees of freedom
# Null hypothesis probability = 5.075851e-01
Photon flux (15-150 keV) in 0.12 sec: 19.1483 ( -1.78482 1.78594 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.13487e-07 ( -1.14494e-08 1.15377e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.024 sec. to 0.096 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.27317 ( -1.0115 0.638435 )
Epeak [keV] : 21.2241 ( )
Norm@50keV : 0.584781 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.62 using 59 PHA bins.
# Reduced chi-squared = 0.8682 for 56 degrees of freedom
# Null hypothesis probability = 7.475971e-01
Photon flux (15-150 keV) in 0.12 sec: 18.7068 ( -1.8105 1.8104 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.07053e-07 ( -1.13334e-08 1.17292e-08 ) ergs/cm2
Band function
Time interval is from -0.024 sec. to 0.096 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.13733 ( -0.564965 1.47758 )
beta : -4.10844 ( 4.03123 1.21775 )
Epeak [keV] : 22.7785 ( -12.2069 6.45539 )
Norm@50keV : 0.706907 ( -0.195191 7.51887 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.44 using 59 PHA bins.
# Reduced chi-squared = 0.8807 for 55 degrees of freedom
# Null hypothesis probability = 7.218457e-01
Photon flux (15-150 keV) in 0.12 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] : 7.96986 (-0.779765 0.823932)
R^2/D10^2 : 21.3404 (-7.22822 11.4652)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.86 using 59 PHA bins.
# Reduced chi-squared = 1.138 for 57 degrees of freedom
# Null hypothesis probability = 2.215317e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.933e-08 4.254e-09
25- 50 5.100e-08 5.964e-09
50-150 1.323e-08 3.605e-09
15-150 9.356e-08 1.087e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 32.1747 (-5.48621 6.78142)
Norm : 146.691 (-25.0587 30.9703)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.707e-08 4.248e-09
25- 50 4.398e-08 4.878e-09
50-150 2.635e-08 7.170e-09
15-150 1.074e-07 1.166e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.91061 (-1.37211 1.71606)
R1^2/D10^2 : 252.808 (-190.873 1939.42)
kT2 [keV] : 10.9030 (-1.90621 3.56697)
R2^2/D10^2 : 4.27143 (-3.3517 6.95194)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.741e-08 1.849e-08
25- 50 4.388e-08 1.985e-08
50-150 2.378e-08 1.361e-08
15-150 1.051e-07 4.643e-08
Peak spectrum fit
Power-law model
Time interval is from -0.462 sec. to 0.538 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.27965 ( -0.223836 0.241945 )
Norm@50keV : 1.44326E-02 ( -0.00246375 0.00240503 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.55 using 59 PHA bins.
# Reduced chi-squared = 1.097 for 57 degrees of freedom
# Null hypothesis probability = 2.856243e-01
Photon flux (15-150 keV) in 1 sec: 2.49397 ( -0.2999 0.299946 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.37416e-07 ( -1.94434e-08 1.98637e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.462 sec. to 0.538 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.46607 ( -1.33584 0.544144 )
Epeak [keV] : 24.9612 ( )
Norm@50keV : 4.56142E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.85 using 59 PHA bins.
# Reduced chi-squared = 1.087 for 56 degrees of freedom
# Null hypothesis probability = 3.055649e-01
Photon flux (15-150 keV) in 1 sec: 2.44395 ( -0.30634 0.30663 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.27755e-07 ( -2.0733e-08 2.3126e-08 ) ergs/cm2
Band function
Time interval is from -0.462 sec. to 0.538 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.35484 ( 1.31268 1.31268 )
beta : -2.94025 ( 3.00135 0.843271 )
Epeak [keV] : 26.0474 ( -26.1838 11.2553 )
Norm@50keV : 5.38171E-02 ( -0.0279736 4290.45 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.45 using 59 PHA bins.
# Reduced chi-squared = 1.099 for 55 degrees of freedom
# Null hypothesis probability = 2.853923e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.35422e-07 ( -1.35415e-07 -1.9557e-08 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 8.49527 (-1.1192 1.2546)
R^2/D10^2 : 2.17105 (-0.925635 1.66829)
(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 2.952e-08 6.275e-09
25- 50 5.719e-08 1.095e-08
50-150 1.823e-08 6.840e-09
15-150 1.049e-07 1.853e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 42.3070 (-10.9527 16.9447)
Norm : 15.6718 (-3.24135 4.28771)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.664e-08 5.740e-09
25- 50 4.936e-08 6.685e-09
50-150 4.056e-08 1.354e-08
15-150 1.266e-07 1.905e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.91804 (-1.44197 2.38341)
R1^2/D10^2 : 30.0179 (-24.6133 261.052)
kT2 [keV] : 11.9336 (-2.5612 7.48068)
R2^2/D10^2 : 0.427983 (-0.38658 0.852865)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.756e-08 1.991e-08
25- 50 4.868e-08 2.576e-08
50-150 3.446e-08 2.115e-08
15-150 1.207e-07 6.330e-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: 2.58957 ( -0.169149 0.181515 )
Norm@50keV : 9.21739E-02 ( -0.0123412 0.0121277 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.13 using 59 PHA bins.
# Reduced chi-squared = 0.9848 for 57 degrees of freedom
# Null hypothesis probability = 5.075851e-01
Photon flux (15-150 keV) in 0.12 sec: 19.1483 ( -1.78482 1.78594 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.13487e-07 ( -1.14494e-08 1.15377e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.27317 ( -1.0115 0.638435 )
Epeak [keV] : 21.2241 ( )
Norm@50keV : 0.584781 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.62 using 59 PHA bins.
# Reduced chi-squared = 0.8682 for 56 degrees of freedom
# Null hypothesis probability = 7.475971e-01
Photon flux (15-150 keV) in 0.12 sec: 18.7068 ( -1.8105 1.8104 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.07053e-07 ( -1.13334e-08 1.17292e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.13733 ( -0.564965 1.47758 )
beta : -4.10844 ( 4.03123 1.21775 )
Epeak [keV] : 22.7785 ( -12.2069 6.45539 )
Norm@50keV : 0.706907 ( -0.195191 7.51887 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.44 using 59 PHA bins.
# Reduced chi-squared = 0.8807 for 55 degrees of freedom
# Null hypothesis probability = 7.218457e-01
Photon flux (15-150 keV) in 0.12 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) = 3.79e-08
S(50-100 keV) = 2.52e-08
T90 vs. Hardness ratio plot
T90 = 0.0839999914169312 sec.
Hardness ratio (energy fluence ratio) = 0.664908
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.79286
Count Ratio (50-100 keV) / (15-25 keV) = 0.240873
Mask shadow pattern
IMX = -1.577341510368630E-01, IMY = 8.043844243067456E-02
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:
-239.820000 -186.040000
-184.820000 -81.470000
-80.820000 -37.715800
-36.820000 -0.024000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9946 -15.6487 1.5 23.8 114.1 6.4440 7.8 1.0 Sco X-1
255.9584 -37.8862 2.1 12.4 36.5 3.1116 5.5 2.9 4U 1700-377
256.5313 -36.3668 4.1 11.1 40.7 1.5871 2.8 5.7 GX 349+2
263.1332 -24.7875 6.4 5.2 139.0 1.0008 1.8 7.2 GX 1+4
264.9355 -44.5225 3.0 15.6 -1.3 2.1173 3.9 9.3 4U 1735-44
268.2224 -1.5913 0.0 27.5 178.6 -1.6883 -2.6 12.1 SW J1753.5-0127
270.1092 -25.2189 0.0 5.0 -143.7 -0.1026 -0.2 12.7 GX 5-1
270.2560 -25.8784 4.1 4.6 -137.2 1.6492 2.9 8.5 GRS 1758-258
274.0166 -14.1864 6.3 16.4 -158.4 1.0562 1.8 9.0 GX 17+2
275.9875 -30.5159 4.3 8.4 -82.7 1.5290 2.7 9.5 H1820-303
284.8609 -24.7833 0.0 16.9 -105.4 0.7622 1.2 12.6 HT1900.1-2455
288.8002 10.9454 195.9 45.4 -153.7 0.0621 0.1 0.1 GRS 1915+105
263.0599 -33.7364 5.5 5.5 25.2 -1.3768 -2.1 6.9 GX 354-0
292.5403 -38.5485 2.7 23.6 -64.6 2.9782 4.3 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-0.024000 0.096000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.8343 -15.7536 6.1 23.9 113.7 0.0342 1.9 10.8 Sco X-1
255.8668 -37.6725 7.2 12.4 37.4 -0.0222 -1.6 11.8 4U 1700-377
256.6089 -36.4853 13.4 11.1 40.0 0.0120 0.9 9.2 GX 349+2
263.1043 -24.9065 4.6 5.1 138.0 0.0354 2.5 11.0 GX 1+4
264.8495 -44.6092 6.3 15.6 -1.1 -0.0272 -1.8 10.6 4U 1735-44
268.3969 -1.5571 10.3 27.5 178.9 -0.0181 -1.1 6.5 SW J1753.5-0127
270.1295 -24.9200 0.0 5.3 -145.7 0.0426 3.1 12.7 GX 5-1
270.1468 -25.5840 0.0 4.8 -140.6 0.0202 1.5 12.7 GRS 1758-258
273.8877 -13.8802 5.8 16.6 -159.2 0.0289 2.0 11.6 GX 17+2
276.0982 -30.4206 9.0 8.5 -83.4 0.0176 1.3 9.5 H1820-303
284.8734 -24.9582 5.5 16.9 -104.8 -0.0335 -2.1 9.1 HT1900.1-2455
288.7772 10.8967 13.6 45.4 -153.7 0.0267 0.8 3.2 GRS 1915+105
262.8091 -33.8265 6.9 5.7 26.5 -0.0229 -1.7 9.0 GX 354-0
248.2925 -17.3434 2.4 20.3 115.8 0.0808 4.9 ------ UNKNOWN
238.7160 -79.5874 2.3 51.9 0.8 0.1846 5.1 ------ UNKNOWN
272.1465 -20.4118 0.6 10.0 -153.0 0.2737 20.3 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
442.380600 556.380000
557.180000 604.310000
605.180000 962.312800
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
288.6530 10.9869 35.2 51.3 -13.1 0.5298 0.3 8.9 GRS 1915+105
299.5729 35.1877 1.1 29.0 8.8 12.4221 10.9 1.2 Cyg X-1
307.9650 40.8620 3.5 21.0 16.9 3.3191 3.3 8.5 Cyg X-3
326.4069 38.2187 0.0 8.0 -12.0 0.1083 0.1 12.7 Cyg X-2
350.6121 34.1175 2.4 13.7 -142.6 4.0916 4.8 ------ UNKNOWN
333.0255 12.3624 2.7 29.3 -74.8 4.7839 4.3 ------ UNKNOWN
16.5007 11.2588 2.4 46.6 -142.0 9.6812 4.9 ------ UNKNOWN
Plot creation:
Fri Feb 24 19:23:58 EST 2023