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
123.7493 -35.2759 0.0355 18.7 138.3 0.0611 5.4 TRIG_01434591
------------------------------------------
Foreground time interval of the image:
0.000 1.024 (delta_t = 1.024 [sec])
Background time interval of the image:
-60.064 -8.064 (delta_t = 52.000 [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 1.024000
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 1.024000
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 1.024000
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 0.000 sec. to 1.024 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.11676 ( -0.460389 0.544108 )
Norm@50keV : 2.93010E-03 ( -0.0011664 0.00116759 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.38 using 59 PHA bins.
# Reduced chi-squared = 1.217 for 57 degrees of freedom
# Null hypothesis probability = 1.257701e-01
Photon flux (15-150 keV) in 1.024 sec: 0.464899 ( -0.139401 0.139723 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.79797e-08 ( -9.86739e-09 1.06569e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.66781 ( -5.41731 2.6623 )
Epeak [keV] : 33.4923 ( -7.56785 9.63568 )
Norm@50keV : 0.823822 ( -0.994365 7352.02 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.10 using 59 PHA bins.
# Reduced chi-squared = 1.127 for 56 degrees of freedom
# Null hypothesis probability = 2.398389e-01
Photon flux (15-150 keV) in 1.024 sec: 0.463088 ( -0.129956 0.131675 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.31621e-08 ( -7.23466e-09 8.26511e-09 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.67160 ( 1.10897 1.32147 )
beta : -10.00000 ( 10 1.48109e-10 )
Epeak [keV] : 33.4830 ( -7.6391 9.20682 )
Norm@50keV : 0.832750 ( -0.226884 112.84 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.10 using 59 PHA bins.
# Reduced chi-squared = 1.147 for 55 degrees of freedom
# Null hypothesis probability = 2.118426e-01
Photon flux (15-150 keV) in 1.024 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] : 8.61583 (-1.9689 2.44219)
R^2/D10^2 : 0.444884 (-0.281012 0.763116)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.17 using 59 PHA bins.
# Reduced chi-squared = 1.108 for 57 degrees of freedom
# Null hypothesis probability = 2.675503e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.426e-09 3.585e-09
25- 50 1.274e-08 7.760e-09
50-150 4.246e-09 3.003e-09
15-150 2.341e-08 1.477e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 44.4578 (-20.2618 56.583)
Norm : 2.95619 (-1.13417 1.81307)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.182e-09 2.995e-09
25- 50 9.871e-09 5.681e-09
50-150 8.539e-09 6.608e-09
15-150 2.559e-08 1.500e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.08318E-04 (199.905 -0.000108318)
R1^2/D10^2 : 0.429196 (-0.429196 -0.429196)
kT2 [keV] : 8.61582 (-1.9689 2.44219)
R2^2/D10^2 : 0.444884 (-0.281012 0.763118)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.530e-09 1.055e-06
25- 50 1.253e-08 7.593e-06
50-150 4.622e-09 1.284e-04
15-150 2.368e-08 1.320e-04
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.11676 ( -0.460389 0.544108 )
Norm@50keV : 2.93010E-03 ( -0.0011664 0.00116759 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.38 using 59 PHA bins.
# Reduced chi-squared = 1.217 for 57 degrees of freedom
# Null hypothesis probability = 1.257701e-01
Photon flux (15-150 keV) in 1.024 sec: 0.464899 ( -0.139401 0.139723 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.79797e-08 ( -9.86739e-09 1.06569e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.66781 ( -5.41731 2.6623 )
Epeak [keV] : 33.4923 ( -7.56785 9.63568 )
Norm@50keV : 0.823822 ( -0.994365 7352.02 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.10 using 59 PHA bins.
# Reduced chi-squared = 1.127 for 56 degrees of freedom
# Null hypothesis probability = 2.398389e-01
Photon flux (15-150 keV) in 1.024 sec: 0.463088 ( -0.129956 0.131675 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.31621e-08 ( -7.23466e-09 8.26511e-09 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.67160 ( 1.10897 1.32147 )
beta : -10.00000 ( 10 20 )
Epeak [keV] : 33.4830 ( -7.6391 9.20682 )
Norm@50keV : 0.832750 ( -0.226884 112.84 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.10 using 59 PHA bins.
# Reduced chi-squared = 1.147 for 55 degrees of freedom
# Null hypothesis probability = 2.118426e-01
Photon flux (15-150 keV) in 1.024 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] : 8.61583 (-1.9689 2.44219)
R^2/D10^2 : 0.444884 (-0.281012 0.763116)
(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 6.426e-09 3.867e-09
25- 50 1.274e-08 6.975e-09
50-150 4.246e-09 3.303e-09
15-150 2.341e-08 1.260e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 44.4578 (-20.2618 56.583)
Norm : 2.95619 (-1.13417 1.81307)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.182e-09 3.284e-09
25- 50 9.871e-09 5.837e-09
50-150 8.539e-09 6.266e-09
15-150 2.559e-08 1.458e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.08318E-04 (199.905 -0.000108318)
R1^2/D10^2 : 0.429196 (-0.429196 -0.429196)
kT2 [keV] : 8.61582 (-1.9689 2.44219)
R2^2/D10^2 : 0.444884 (-0.281012 0.763118)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.530e-09 1.265e-06
25- 50 1.253e-08 7.910e-06
50-150 4.622e-09 1.570e-04
15-150 2.368e-08 1.598e-04
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: 2.11676 ( -0.460389 0.544108 )
Norm@50keV : 2.93010E-03 ( -0.0011664 0.00116759 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.38 using 59 PHA bins.
# Reduced chi-squared = 1.217 for 57 degrees of freedom
# Null hypothesis probability = 1.257701e-01
Photon flux (15-150 keV) in 1.024 sec: 0.464899 ( -0.139401 0.139723 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.79797e-08 ( -9.86739e-09 1.06569e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.66781 ( -5.41731 2.6623 )
Epeak [keV] : 33.4923 ( -7.56785 9.63568 )
Norm@50keV : 0.823822 ( -0.994365 7352.02 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.10 using 59 PHA bins.
# Reduced chi-squared = 1.127 for 56 degrees of freedom
# Null hypothesis probability = 2.398389e-01
Photon flux (15-150 keV) in 1.024 sec: 0.463088 ( -0.129956 0.131675 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.31621e-08 ( -7.23466e-09 8.26511e-09 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.67160 ( 1.10897 1.32147 )
beta : -10.00000 ( 10 1.07998e-09 )
Epeak [keV] : 33.4830 ( -7.6391 9.20682 )
Norm@50keV : 0.832750 ( -0.226884 112.84 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.10 using 59 PHA bins.
# Reduced chi-squared = 1.147 for 55 degrees of freedom
# Null hypothesis probability = 2.118426e-01
Photon flux (15-150 keV) in 1.024 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) = 8.68e-09
S(50-100 keV) = 8.03e-09
T90 vs. Hardness ratio plot
T90 = 1.02400004863739 sec.
Hardness ratio (energy fluence ratio) = 0.925115
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.3849
Count Ratio (50-100 keV) / (15-25 keV) = 0.202291
Mask shadow pattern
IMX = -2.529594281384006E-01, IMY = -2.252608541450744E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
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:
-60.064000 -8.064000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.4301 -40.7335 9.1 21.6 168.5 0.1213 1.3 11.6 Vela X-1
170.2352 -60.4794 3.4 36.2 -136.3 -0.4714 -3.4 8.9 Cen X-3
186.8901 -62.8350 10.7 43.1 -129.4 0.2396 1.1 7.5 GX 301-2
139.7770 -19.8464 1.9 39.4 144.7 1.3392 5.9 ------ UNKNOWN
53.9149 -17.0143 2.4 53.6 19.5 2.0204 4.7 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
0.000000 1.024000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.7815 -40.6298 6.8 21.9 168.7 -0.0188 -1.7 12.4 Vela X-1
170.6660 -60.5899 0.0 36.4 -136.1 -0.0148 -1.0 10.5 Cen X-3
186.7437 -62.6863 172.6 43.1 -129.6 0.0017 0.1 5.6 GX 301-2
57.1526 -20.1994 2.0 49.1 19.8 0.1830 5.8 ------ UNKNOWN
127.4577 -30.2867 2.2 24.6 137.8 0.0686 5.2 ------ UNKNOWN
123.7493 -35.2759 2.1 18.7 138.3 0.0611 5.4 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
69.436600 242.966000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.4154 -40.4464 5.3 10.6 -133.0 0.4826 2.2 8.3 Vela X-1
170.3206 -60.7955 8.5 39.0 -110.1 0.8584 1.3 10.4 Cen X-3
164.8032 -4.7468 2.5 48.6 165.0 3.4167 4.7 ------ UNKNOWN
56.6639 -27.1447 2.6 56.9 2.3 4.4787 4.5 ------ UNKNOWN
152.1363 -53.7116 2.3 27.1 -114.0 1.3309 5.1 ------ UNKNOWN
142.1761 -63.8333 3.1 30.7 -91.7 1.3111 3.7 ------ UNKNOWN
187.7315 -48.5772 2.1 48.0 -129.0 5.5320 5.5 ------ UNKNOWN
Plot creation:
Mon Jan 12 10:16:52 EST 2026