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
135.7650 -40.3072 0.0497 24.3 -111.2 2.4116 3.9 TRIG_01219563
------------------------------------------
Foreground time interval of the image:
-15.000 72.101 (delta_t = 87.101 [sec])
Background time interval of the image:
-19.799 -15.000 (delta_t = 4.799 [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
Time interval is from -15.000 sec. to 145.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.60315 ( -0.201384 0.217183 )
Norm@50keV : 8.10972E-04 ( -0.000132066 0.000132644 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.97 using 59 PHA bins.
# Reduced chi-squared = 1.087 for 57 degrees of freedom
# Null hypothesis probability = 3.034319e-01
Photon flux (15-150 keV) in 160 sec: 0.169937 ( -0.0159834 0.0159835 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.33689e-06 ( -1.53419e-07 1.58317e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -15.000 sec. to 145.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.219872 ( -2.54937 1.56558 )
Epeak [keV] : 23.3589 ( -14.5336 4.13534 )
Norm@50keV : 3.31588E-02 ( -0.036122 2.12409 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.47 using 59 PHA bins.
# Reduced chi-squared = 0.9549 for 56 degrees of freedom
# Null hypothesis probability = 5.710572e-01
Photon flux (15-150 keV) in 160 sec: 0.160717 ( -0.016558 0.016599 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.11298e-06 ( -1.43133e-07 1.73189e-07 ) ergs/cm2
Band function
Time interval is from -15.000 sec. to 145.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.23811 ( -1.65214 -0.520862 )
beta : -3.67204 ( -1.912 0.670274 )
Epeak [keV] : 24.6680 ( -5.74356 3.51437 )
Norm@50keV : 0.380976 ( -0.366696 100.241 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.32 using 59 PHA bins.
# Reduced chi-squared = 0.9149 for 55 degrees of freedom
# Null hypothesis probability = 6.537981e-01
Photon flux (15-150 keV) in 160 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.17974e-06 ( -1.17862e-06 -1.58955e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 6.60342 (-0.583885 0.641972)
R^2/D10^2 : 0.414245 (-0.13655 0.205011)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.11 using 59 PHA bins.
# Reduced chi-squared = 0.9669 for 57 degrees of freedom
# Null hypothesis probability = 5.461251e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.352e-07 6.208e-08
25- 50 5.309e-07 7.816e-08
50-150 7.091e-08 2.555e-08
15-150 1.037e-06 1.300e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 26.6135 (-5.07601 6.72113)
Norm : 1.52331 (-0.300522 0.391796)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.641e-07 5.728e-08
25- 50 4.947e-07 6.528e-08
50-150 2.302e-07 8.517e-08
15-150 1.189e-06 1.494e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.93180 (-0.973159 0.82046)
R1^2/D10^2 : 0.595884 (-0.22474 0.462889)
kT2 [keV] : 20.7743 (-8.73772 -22.4238)
R2^2/D10^2 : 1.03854E-03 (-0.000829922 0.0235663)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.520e-07 1.212e-07
25- 50 4.959e-07 1.719e-07
50-150 2.606e-07 1.595e-07
15-150 1.208e-06 3.782e-07
Peak spectrum fit
Power-law model
Time interval is from 40.500 sec. to 41.500 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.44964 ( -1.39828 1.5148 )
Norm@50keV : 2.32209E-03 ( -0.00232209 0.00145043 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.09 using 59 PHA bins.
# Reduced chi-squared = 0.8261 for 57 degrees of freedom
# Null hypothesis probability = 8.225304e-01
Photon flux (15-150 keV) in 1 sec: 0.286138 ( -0.18468 0.187956 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.2222e-08 ( -1.48019e-08 1.51423e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 40.500 sec. to 41.500 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.29524 ( -1.29685 -1.29685 )
Epeak [keV] : 259.808 ( -260.662 -260.662 )
Norm@50keV : 2.72917E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.08 using 59 PHA bins.
# Reduced chi-squared = 0.8408 for 56 degrees of freedom
# Null hypothesis probability = 7.962062e-01
Photon flux (15-150 keV) in 1 sec: 0.284007 ( -0.284007 0.095055 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.22311e-08 ( -1.48136e-08 1.50935e-08 ) ergs/cm2
Band function
Time interval is from 40.500 sec. to 41.500 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.44646 ( -0.979928 1.0201 )
beta : -9.37167 ( 9.37167 9.37167 )
Epeak [keV] : 9985.17 ( -447.413 -457.238 )
Norm@50keV : 2.32959E-03 ( -0.00156934 0.305467 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.09 using 59 PHA bins.
# Reduced chi-squared = 0.8561 for 55 degrees of freedom
# Null hypothesis probability = 7.671998e-01
Photon flux (15-150 keV) in 1 sec: 0.279294 ( ) 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] : 19.8517 (-11.755 50.0258)
R^2/D10^2 : 1.26136E-02 (-0.0126004 0.250696)
(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 9.611e-10 6.960e-10
25- 50 4.764e-09 3.253e-09
50-150 1.390e-08 1.107e-08
15-150 1.963e-08 1.501e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-199.363 -199.363)
Norm : 1.18575 (-0.741153 1.30247)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.953e-09 2.139e-09
25- 50 5.680e-09 4.082e-09
50-150 1.246e-08 8.435e-09
15-150 2.109e-08 1.481e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.97405 (-2.93734 36.843)
R1^2/D10^2 : 14.4977 (-21.2664 -21.2664)
kT2 [keV] : 23.4215 (-12.864 -23.0291)
R2^2/D10^2 : 6.72933E-03 (-0.00707075 0.0409499)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.230e-09 2.022e-09
25- 50 3.997e-09 2.459e-09
50-150 1.488e-08 1.107e-08
15-150 2.211e-08 1.365e-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: 2.55703 ( -0.20928 0.226557 )
Norm@50keV : 1.10572E-03 ( -0.00018978 0.00019052 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.29 using 59 PHA bins.
# Reduced chi-squared = 1.163 for 57 degrees of freedom
# Null hypothesis probability = 1.870346e-01
Photon flux (15-150 keV) in 87.1 sec: 0.225030 ( -0.022807 0.0228088 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.7856e-07 ( -1.21787e-07 1.25975e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.119733 ( -2.45148 1.55157 )
Epeak [keV] : 24.3196 ( -12.2114 4.0847 )
Norm@50keV : 4.84760E-02 ( -0.0519156 2.64063 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.14 using 59 PHA bins.
# Reduced chi-squared = 1.020 for 56 degrees of freedom
# Null hypothesis probability = 4.324863e-01
Photon flux (15-150 keV) in 87.1 sec: 0.214334 ( -0.023034 0.023124 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.16877e-07 ( -1.09844e-07 1.29778e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.57111 ( -1.74853 -0.833068 )
beta : -3.54791 ( 3.53725 0.684931 )
Epeak [keV] : 24.8717 ( -4.96172 3.35064 )
Norm@50keV : 0.880424 ( -0.88504 136.942 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.48 using 59 PHA bins.
# Reduced chi-squared = 0.9905 for 55 degrees of freedom
# Null hypothesis probability = 4.944896e-01
Photon flux (15-150 keV) in 87.1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 8.69409e-07 ( -8.68799e-07 -1.23888e-07 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 4.47e-07
S(50-100 keV) = 2.94e-07
T90 vs. Hardness ratio plot
T90 = 144 sec.
Hardness ratio (energy fluence ratio) = 0.657718
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.768866
Count Ratio (50-100 keV) / (15-25 keV) = 0.213011
Mask shadow pattern
IMX = -1.637113721994272E-01, IMY = 4.217453020222796E-01
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:
-19.799400 -15.000000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.5702 -40.5834 2.6 24.6 -111.3 0.1510 4.4 2.6 Vela X-1
170.5181 -60.6413 5.1 44.8 -150.6 0.1149 2.3 6.1 Cen X-3
186.5377 -62.8231 61.5 51.3 -156.6 -0.0139 -0.2 4.6 GX 301-2
111.2867 4.8345 2.3 43.6 -16.6 0.2102 5.0 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-15.000000 72.100600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.3907 -40.6584 7.0 24.8 -111.1 -1.0503 -1.7 8.8 Vela X-1
170.4918 -60.7409 1809.1 44.9 -150.4 0.0054 0.0 8.8 Cen X-3
186.7738 -62.6714 9.5 51.3 -156.8 1.6285 1.2 6.7 GX 301-2
207.3558 -43.1915 3.1 54.8 174.8 7.5081 3.7 ------ UNKNOWN
182.4327 -70.6218 2.3 55.8 -148.4 14.6067 5.1 ------ UNKNOWN
100.4417 -21.8501 2.5 45.1 -58.1 10.2656 4.6 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
132.900610 364.110000
365.000000 455.880000
457.000000 963.094100
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.4989 -40.5874 1.2 0.1 -84.9 10.3408 9.3 2.4 Vela X-1
170.4512 -60.5061 10.0 29.2 -171.2 1.3830 1.1 8.1 Cen X-3
186.6762 -62.8183 4.5 37.2 -172.0 3.9158 2.6 2.9 GX 301-2
141.0142 -20.5358 2.5 20.5 58.4 5.4941 4.6 ------ UNKNOWN
Plot creation:
Tue Mar 12 07:54:37 EDT 2024