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
256.4668 -37.8773 0.0281 24.4 -35.7 5.0853 6.8 TRIG_01209635
------------------------------------------
Foreground time interval of the image:
-83.780 460.401 (delta_t = 544.181 [sec])
Background time interval of the image:
-239.000 -83.780 (delta_t = 155.220 [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
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
Time interval is from -83.780 sec. to 531.184 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.57804 ( )
Norm@50keV : 1.65563E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 124.67 using 59 PHA bins.
# Reduced chi-squared = 2.1872 for 57 degrees of freedom
# Null hypothesis probability = 5.865889e-07
Photon flux (15-150 keV) in 615 sec: 0.341439 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.04106e-05 ( 0 0 ) ergs/cm2
Cutoff power-law model
Time interval is from -83.780 sec. to 531.184 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.06679 ( -0.500128 0.450609 )
Epeak [keV] : 24.0599 ( -6.45719 3.91226 )
Norm@50keV : 1.26205E-02 ( -0.0057491 0.0123023 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 82.72 using 59 PHA bins.
# Reduced chi-squared = 1.477 for 56 degrees of freedom
# Null hypothesis probability = 1.164286e-02
Photon flux (15-150 keV) in 615 sec: 0.309617 ( -0.01501 0.015143 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.13982e-06 ( -4.38495e-07 4.54116e-07 ) ergs/cm2
Band function
Time interval is from -83.780 sec. to 531.184 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.253834 ( -0.833459 1.34054 )
beta : -3.23665 ( -0.287448 0.265537 )
Epeak [keV] : 26.7704 ( -3.92129 2.32061 )
Norm@50keV : 4.37098E-02 ( -0.0469722 0.318691 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.79 using 59 PHA bins.
# Reduced chi-squared = 1.360 for 55 degrees of freedom
# Null hypothesis probability = 3.913990e-02
Photon flux (15-150 keV) in 615 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] : 8.28887 ( )
R^2/D10^2 : 0.289714 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 139.62 using 59 PHA bins.
# Reduced chi-squared = 2.4494 for 57 degrees of freedom
# Null hypothesis probability = 6.959216e-09
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.270e-06 1.436e-07
25- 50 4.221e-06 1.550e-07
50-150 1.244e-06 1.341e-07
15-150 7.735e-06 2.829e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 33.0153 (-2.39642 2.66202)
Norm : 2.41859 (-0.188618 0.206162)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.169e-06 1.633e-07
25- 50 3.810e-06 1.261e-07
50-150 2.357e-06 2.257e-07
15-150 9.336e-06 3.383e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.63886 (-0.961717 0.669141)
R1^2/D10^2 : 0.618664 (-0.153343 0.204028)
kT2 [keV] : 18.4966 (-6.32354 11.9579)
R2^2/D10^2 : 4.04796E-03 (-0.00220288 0.00873484)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.710e-06 2.955e-07
25- 50 3.931e-06 3.890e-07
50-150 2.421e-06 9.917e-07
15-150 9.062e-06 1.516e-06
Peak spectrum fit
Power-law model
Time interval is from 6.740 sec. to 7.740 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.55666 ( -0.420773 0.495854 )
Norm@50keV : 4.57595E-03 ( -0.00159264 0.00159227 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.99 using 59 PHA bins.
# Reduced chi-squared = 0.7892 for 57 degrees of freedom
# Null hypothesis probability = 8.753231e-01
Photon flux (15-150 keV) in 1 sec: 0.931063 ( -0.193282 0.193285 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.64912e-08 ( -1.16033e-08 1.22859e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 6.740 sec. to 7.740 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.50436 ( )
Epeak [keV] : 15.2921 ( )
Norm@50keV : 2.31415E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.36 using 59 PHA bins.
# Reduced chi-squared = 0.7921 for 56 degrees of freedom
# Null hypothesis probability = 8.693296e-01
Photon flux (15-150 keV) in 1 sec: 0.906244 ( -0.196513 0.199946 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.13767e-08 ( -1.19741e-08 1.58232e-08 ) ergs/cm2
Band function
Time interval is from 6.740 sec. to 7.740 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.897059 ( 0.336304 0.336304 )
beta : -3.22428 ( 3.11679 0.852844 )
Epeak [keV] : 23.2592 ( -21.4942 8.96456 )
Norm@50keV : 1.36381 ( -1.27286 1018.38 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.44 using 59 PHA bins.
# Reduced chi-squared = 0.7899 for 55 degrees of freedom
# Null hypothesis probability = 8.698148e-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] : 6.45499 (-1.24683 1.60506)
R^2/D10^2 : 2.49118 (-1.53618 3.90816)
(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 1.521e-08 6.053e-09
25- 50 1.771e-08 8.085e-09
50-150 2.168e-09 1.545e-09
15-150 3.508e-08 1.533e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 27.6967 (-10.5354 20.6263)
Norm : 8.04227 (-3.1026 5.66467)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.568e-08 4.833e-09
25- 50 1.711e-08 5.577e-09
50-150 8.418e-09 5.440e-09
15-150 4.121e-08 1.364e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.55631 (-5.649 1.78603)
R1^2/D10^2 : 4.20779 (-3.98274 -3.98274)
kT2 [keV] : 21.1663 (-23.045 -23.045)
R2^2/D10^2 : 7.28900E-03 (-0.0058721 3.26178)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.594e-08 9.885e-09
25- 50 1.604e-08 9.080e-09
50-150 1.146e-08 8.595e-09
15-150 4.345e-08 2.382e-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: 2.59587 ( )
Norm@50keV : 1.75480E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 137.85 using 59 PHA bins.
# Reduced chi-squared = 2.4185 for 57 degrees of freedom
# Null hypothesis probability = 1.194314e-08
Photon flux (15-150 keV) in 544.2 sec: 0.366006 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 9.8171e-06 ( 0 0 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.07284 ( -0.489444 0.441883 )
Epeak [keV] : 23.7046 ( -6.34369 3.89587 )
Norm@50keV : 1.35907E-02 ( -0.00610317 0.0128613 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 93.30 using 59 PHA bins.
# Reduced chi-squared = 1.666 for 56 degrees of freedom
# Null hypothesis probability = 1.296656e-03
Photon flux (15-150 keV) in 544.2 sec: 0.331436 ( -0.015866 0.016014 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.6192e-06 ( -4.04395e-07 4.18e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.47708E-02 ( -0.955092 1.30424 )
beta : -3.22579 ( -0.574977 0.243402 )
Epeak [keV] : 26.7560 ( -3.8913 2.14277 )
Norm@50keV : 6.10389E-02 ( -0.0616352 0.418866 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 85.40 using 59 PHA bins.
# Reduced chi-squared = 1.553 for 55 degrees of freedom
# Null hypothesis probability = 5.366270e-03
Photon flux (15-150 keV) in 544.2 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) = 3.48e-06
S(50-100 keV) = 2.33e-06
T90 vs. Hardness ratio plot
T90 = 526.68799996376 sec.
Hardness ratio (energy fluence ratio) = 0.66954
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.938943
Count Ratio (50-100 keV) / (15-25 keV) = 0.257065
Mask shadow pattern
IMX = 3.676563418217733E-01, IMY = 2.641401115414274E-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:
-239.000000 -83.780000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
245.1447 -15.6216 0.9 0.1 80.4 4.3745 13.1 9.6 Sco X-1
254.5170 35.4848 30.1 51.9 175.8 -0.3911 -0.4 9.0 Her X-1
256.1741 -37.8245 1.4 24.2 -35.3 2.6985 8.2 9.0 4U 1700-377
256.3904 -36.2722 4.1 22.9 -37.4 -0.8946 -2.8 9.3 GX 349+2
263.1734 -24.7565 4.2 19.1 -72.4 0.9827 2.7 9.0 GX 1+4
264.5801 -44.3117 0.0 33.0 -39.6 -0.3226 -0.8 10.8 4U 1735-44
268.4533 -1.6189 5.6 26.8 -133.0 0.7833 2.1 11.2 SW J1753.5-0127
270.1033 -25.2052 0.0 25.1 -77.4 -0.6281 -1.6 12.4 GX 5-1
270.3068 -25.7196 6.5 25.5 -76.4 0.7444 1.9 1.4 GRS 1758-258
274.1531 -14.1177 14.1 28.0 -103.1 0.3249 0.8 9.9 GX 17+2
275.7471 -30.4386 8.0 31.6 -70.5 0.6933 1.5 10.2 H1820-303
285.1992 -25.0324 0.0 38.5 -83.1 1.8648 2.4 11.1 HT1900.1-2455
263.0740 -33.9620 6.3 24.4 -51.8 -0.6762 -1.8 8.7 GX 354-0
212.1161 -12.5151 2.8 32.2 77.4 3.2158 4.1 ------ UNKNOWN
253.2239 -68.0705 2.4 52.7 -17.6 3.7699 4.8 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-83.780000 460.400600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
245.1267 -15.6919 2.1 0.1 45.7 -3.3549 -5.4 9.1 Sco X-1
254.5881 35.3703 5.0 51.8 175.9 4.9072 2.3 6.6 Her X-1
255.8571 -37.6857 3.3 24.0 -34.8 -2.5749 -3.5 11.3 4U 1700-377
256.5771 -36.5826 0.0 23.3 -37.4 0.8008 1.1 11.8 GX 349+2
263.0608 -24.7359 8.0 19.0 -72.4 -1.0340 -1.4 2.9 GX 1+4
264.8057 -44.3085 8.1 33.1 -39.8 1.1670 1.4 8.9 4U 1735-44
268.4195 -1.6051 5.5 26.8 -133.1 -1.6080 -2.1 9.7 SW J1753.5-0127
270.4357 -24.9621 103.9 25.4 -78.2 -0.0863 -0.1 10.8 GX 5-1
270.2930 -25.8666 9.5 25.5 -76.1 -0.9293 -1.2 7.4 GRS 1758-258
273.9078 -14.1451 9.1 27.7 -103.1 -1.1032 -1.3 8.7 GX 17+2
275.7486 -30.4215 22.3 31.6 -70.5 -0.4917 -0.5 9.7 H1820-303
284.8690 -25.0257 4.0 38.2 -83.0 5.0020 2.9 11.1 HT1900.1-2455
263.1470 -33.9366 6.0 24.4 -51.9 1.3853 1.9 10.0 GX 354-0
218.9060 -22.9804 2.0 25.9 55.6 4.8723 5.8 ------ UNKNOWN
244.5947 -34.2946 2.5 18.7 -12.2 2.7989 4.6 ------ UNKNOWN
242.8365 -43.9482 2.1 28.4 -10.2 3.8069 5.4 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
610.700600 623.700600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.4075 35.1459 3.4 39.8 18.0 -0.2430 -3.4 12.0 Her X-1
268.2833 -1.4153 38.6 51.4 -35.1 -0.0413 -0.3 5.6 SW J1753.5-0127
288.6781 10.8613 363.0 30.3 -52.3 0.0017 0.0 8.7 GRS 1915+105
299.7853 35.1519 4.2 4.5 -27.3 0.1172 2.8 10.0 Cyg X-1
308.3205 40.8122 0.0 4.4 139.2 -0.0412 -1.0 12.7 Cyg X-3
325.9590 38.2002 20.8 17.0 177.6 -0.0236 -0.6 12.4 Cyg X-2
303.9463 56.9552 2.7 19.3 95.3 0.2404 4.2 ------ UNKNOWN
Plot creation:
Sat Jan 20 00:51:30 EST 2024