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
135.5020 -40.5332 0.0000 36.7 -19.6 0.0639 0.6 TRIG_01125106
------------------------------------------
Foreground time interval of the image:
36.032 72.501 (delta_t = 36.469 [sec])
Background time interval of the image:
-239.000 36.032 (delta_t = 275.032 [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
Multiple GTIs in the spectrum
tstart tstop
36.032000 218.980000
220.000000 323.660000
325.000000 338.070000
340.000000 354.360000
356.000000 356.920000
360.000000 403.970000
405.000000 572.190000
573.000000 719.080000
721.000000 933.356000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.25496 ( -0.144814 0.151091 )
Norm@50keV : 4.64347E-04 ( -5.27714e-05 5.40055e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 106.09 using 59 PHA bins.
# Reduced chi-squared = 1.8612 for 57 degrees of freedom
# Null hypothesis probability = 8.588501e-05
Photon flux (15-150 keV) in 884.6 sec: 0.154644 ( -0.0092565 0.00928155 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.60919e-06 ( -3.41777e-07 3.44238e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
36.032000 218.980000
220.000000 323.660000
325.000000 338.070000
340.000000 354.360000
356.000000 356.920000
360.000000 403.970000
405.000000 572.190000
573.000000 719.080000
721.000000 933.356000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 2.10272E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 374.61 using 59 PHA bins.
# Reduced chi-squared = 6.6894 for 56 degrees of freedom
# Null hypothesis probability = 1.105893e-48
Photon flux (15-150 keV) in 884.6 sec: 0.138792 ( -0.01019 0.010212 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.79307e-06 ( -3.33574e-07 3.42048e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
36.032000 218.980000
220.000000 323.660000
325.000000 338.070000
340.000000 354.360000
356.000000 356.920000
360.000000 403.970000
405.000000 572.190000
573.000000 719.080000
721.000000 933.356000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.366002 ( -1.08619 1.57406 )
beta : -10.0000 ( 10 10 )
Epeak [keV] : 19.8276 ( -2.43751 3.10347 )
Norm@50keV : 0.132911 ( -0.132908 1.26976 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.76 using 59 PHA bins.
# Reduced chi-squared = 1.159 for 55 degrees of freedom
# Null hypothesis probability = 1.955565e-01
Photon flux (15-150 keV) in 884.6 sec: 0.139189 ( 6.86081 -0.010612 ) 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] : 5.74840 (-0.311182 0.3265)
R^2/D10^2 : 0.638128 (-0.150177 0.200318)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.06 using 59 PHA bins.
# Reduced chi-squared = 1.159 for 57 degrees of freedom
# Null hypothesis probability = 1.924535e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.324e-06 2.136e-07
25- 50 2.109e-06 1.871e-07
50-150 1.615e-07 4.604e-08
15-150 4.594e-06 2.840e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 16.7009 (-1.66843 1.90546)
Norm : 2.29550 (-0.356318 0.433777)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.657e-06 2.154e-07
25- 50 2.003e-06 1.592e-07
50-150 4.352e-07 1.171e-07
15-150 5.095e-06 3.384e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.11015 (-1.83982 4.60687)
R1^2/D10^2 : 32.7897 (-36.3981 -36.9677)
kT2 [keV] : 6.07906 (-0.443504 1.29609)
R2^2/D10^2 : 0.462948 (-0.235086 0.200581)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.471e-06 6.847e-07
25- 50 2.116e-06 4.755e-07
50-150 2.030e-07 6.900e-08
15-150 4.791e-06 8.855e-07
Peak spectrum fit
Power-law model
Time interval is from 911.168 sec. to 912.168 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.67517 ( -0.636985 0.863271 )
Norm@50keV : 2.60883E-03 ( -0.00147879 0.00158809 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.75 using 59 PHA bins.
# Reduced chi-squared = 0.6797 for 57 degrees of freedom
# Null hypothesis probability = 9.694037e-01
Photon flux (15-150 keV) in 1 sec: 0.572787 ( -0.183546 0.184194 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.75166e-08 ( -1.07776e-08 1.22053e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 911.168 sec. to 912.168 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.865746 ( )
Epeak [keV] : 19.3008 ( )
Norm@50keV : 4.59417E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.89 using 59 PHA bins.
# Reduced chi-squared = 0.6766 for 56 degrees of freedom
# Null hypothesis probability = 9.696909e-01
Photon flux (15-150 keV) in 1 sec: 0.561308 ( -0.178553 0.181952 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.40796e-08 ( -9.3e-09 1.34116e-08 ) ergs/cm2
Band function
Time interval is from 911.168 sec. to 912.168 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.80118 ( -0.977244 4.3998 )
beta : -3.29939 ( 9.37167 19.3716 )
Epeak [keV] : 21.2814 ( -9.63705 17.3339 )
Norm@50keV : 268.042 ( -268.372 753.281 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.50 using 59 PHA bins.
# Reduced chi-squared = 0.6819 for 55 degrees of freedom
# Null hypothesis probability = 9.657937e-01
Photon flux (15-150 keV) in 1 sec: 0.563301 ( 6.4367 -0.180843 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.41884e-08 ( 0 0 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 6.03754 (-1.80632 2.66262)
R^2/D10^2 : 2.08686 (-2.08412 8.12527)
(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 1.020e-08 6.195e-09
25- 50 1.031e-08 6.730e-09
50-150 9.684e-10 9.095e-10
15-150 2.147e-08 1.374e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 24.3921 (-12.4137 31.0991)
Norm : 5.67544 (-2.91947 7.54784)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.023e-08 6.319e-09
25- 50 1.032e-08 6.206e-09
50-150 4.230e-09 3.965e-09
15-150 2.477e-08 1.507e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.64350 (-4.66194 3.53296)
R1^2/D10^2 : 4.89506 (-4.87836 -4.87836)
kT2 [keV] : 11.6304 (-11.7142 -11.7142)
R2^2/D10^2 : 6.10342E-02 (-0.0598768 7.76905)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.051e-08 6.435e-09
25- 50 1.003e-08 6.535e-09
50-150 4.334e-09 4.044e-09
15-150 2.487e-08 1.609e-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: 2.93268 ( -0.544431 0.747274 )
Norm@50keV : 6.92342E-04 ( -0.00034848 0.00036963 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.38 using 59 PHA bins.
# Reduced chi-squared = 1.287 for 57 degrees of freedom
# Null hypothesis probability = 7.088767e-02
Photon flux (15-150 keV) in 36.47 sec: 0.181379 ( -0.0398261 0.0399204 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.94361e-07 ( -8.51235e-08 9.3834e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.91683 ( )
Epeak [keV] : 2.85928 ( )
Norm@50keV : 3.11717E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.97 using 59 PHA bins.
# Reduced chi-squared = 1.321 for 56 degrees of freedom
# Null hypothesis probability = 5.412241e-02
Photon flux (15-150 keV) in 36.47 sec: 0.181081 ( -0.039613 0.039955 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.92444e-07 ( -8.76101e-08 9.50532e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -5.61564 ( 5.61564 5.61564 )
beta : -2.93269 ( -0.745992 0.543628 )
Epeak [keV] : 2.81798 ( -2.81798 -2.81798 )
Norm@50keV : 9.40983E-02 ( -0.0473627 0.0502386 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.38 using 59 PHA bins.
# Reduced chi-squared = 1.334 for 55 degrees of freedom
# Null hypothesis probability = 4.941201e-02
Photon flux (15-150 keV) in 36.47 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.03608e-07 ( 0 0 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 1.82e-06
S(50-100 keV) = 7.62e-07
T90 vs. Hardness ratio plot
T90 = 596.87600004673 sec.
Hardness ratio (energy fluence ratio) = 0.418681
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.669509
Count Ratio (50-100 keV) / (15-25 keV) = 0.0502995
Mask shadow pattern
IMX = 7.011492302781198E-01, IMY = 2.489949129413957E-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 36.032000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.6798 -40.6865 1.5 36.8 -19.7 4.4778 7.5 10.5 Vela X-1
127.0281 -28.5441 2.5 23.0 -14.3 2.0548 4.6 ------ UNKNOWN
136.1304 -56.7246 2.2 51.9 -11.6 4.2657 5.3 ------ UNKNOWN
163.6622 -27.8543 3.0 45.6 -57.8 7.5103 3.9 ------ UNKNOWN
160.8178 22.3486 2.9 48.0 -129.0 8.0747 3.9 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
36.032000 72.500590
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.4247 -40.6102 7.4 36.7 -19.4 0.1696 1.6 5.8 Vela X-1
124.4948 -35.1083 2.3 29.1 -6.7 0.4505 5.0 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
161.000600 218.980000
220.000000 323.660000
325.000000 338.070000
340.000000 354.360000
356.000000 356.920000
360.000000 403.970000
405.000000 572.190000
573.000000 719.080000
721.000000 963.007600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.6460 -40.6755 1.3 0.1 157.4 10.2745 9.1 9.0 Vela X-1
170.3308 -60.4767 5.5 29.0 -1.8 -3.1614 -2.1 8.8 Cen X-3
186.2751 -62.8462 0.0 36.9 -2.5 -2.1614 -1.3 11.4 GX 301-2
110.9840 -68.2107 2.2 30.5 51.3 10.1237 5.2 ------ UNKNOWN
117.5737 7.8652 3.7 51.4 -169.8 12.0650 3.2 ------ UNKNOWN
140.8272 0.4629 2.7 41.4 -138.8 9.0077 4.3 ------ UNKNOWN
192.1672 -28.4503 3.2 47.2 -53.1 18.8711 3.6 ------ UNKNOWN
148.6526 5.8399 2.9 48.0 -129.1 22.3478 3.9 ------ UNKNOWN
188.5656 -26.3216 2.6 45.6 -57.9 24.3454 4.5 ------ UNKNOWN
Plot creation:
Sat Sep 24 13:40:37 EDT 2022