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
358.4273 -28.6315 0.0186 33.8 168.5 0.2079 10.3 TRIG_01344131
------------------------------------------
Foreground time interval of the image:
-0.460 1.200 (delta_t = 1.660 [sec])
Background time interval of the image:
-239.504 -0.460 (delta_t = 239.044 [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 -0.460 sec. to 1.200 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.830902 ( -0.43425 0.391466 )
Norm@50keV : 6.68355E-03 ( -0.00144825 0.00136588 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.52 using 59 PHA bins.
# Reduced chi-squared = 0.7810 for 57 degrees of freedom
# Null hypothesis probability = 8.856711e-01
Photon flux (15-150 keV) in 1.66 sec: 0.767460 ( -0.156177 0.157637 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.27998e-07 ( -2.58766e-08 2.60168e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.460 sec. to 1.200 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.844748 ( -0.458938 0.375512 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 6.75854E-03 ( -0.00131365 0.00626343 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.55 using 59 PHA bins.
# Reduced chi-squared = 0.7955 for 56 degrees of freedom
# Null hypothesis probability = 8.647874e-01
Photon flux (15-150 keV) in 1.66 sec: 0.772311 ( -0.16187 0.15309 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.27856e-07 ( -2.57278e-08 1.26802e-08 ) ergs/cm2
Band function
Time interval is from -0.460 sec. to 1.200 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.832983 ( 0.833388 0.833388 )
beta : -0.831091 ( -0.391351 0.434222 )
Epeak [keV] : 13.8080 ( -13.8035 -13.8035 )
Norm@50keV : 1.01233E-02 ( -0.00484414 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.52 using 59 PHA bins.
# Reduced chi-squared = 0.8094 for 55 degrees of freedom
# Null hypothesis probability = 8.429442e-01
Photon flux (15-150 keV) in 1.66 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] : 30.2776 (-8.95981 17.612)
R^2/D10^2 : 1.06278E-02 (-0.0074059 0.0191781)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.26 using 59 PHA bins.
# Reduced chi-squared = 0.9168 for 57 degrees of freedom
# Null hypothesis probability = 6.532965e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.516e-09 1.258e-09
25- 50 1.558e-08 7.108e-09
50-150 1.005e-07 4.230e-08
15-150 1.186e-07 5.092e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-53.9081 -200)
Norm : 3.19587 (-0.647085 0.647085)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.321e-08 7.791e-09
25- 50 2.541e-08 1.448e-08
50-150 5.573e-08 3.218e-08
15-150 9.435e-08 5.495e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.81945 (-8.39124 8.15997)
R1^2/D10^2 : 0.214274 (-0.197899 0.748194)
kT2 [keV] : 84.1828 (-54.6717 -79.9426)
R2^2/D10^2 : 8.02611E-04 (-0.000721504 0.00416664)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.161e-08 6.472e-09
25- 50 1.448e-08 6.978e-09
50-150 1.063e-07 6.228e-08
15-150 1.324e-07 6.904e-08
Peak spectrum fit
Power-law model
Time interval is from 0.064 sec. to 1.064 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.935847 ( -0.510816 0.451407 )
Norm@50keV : 7.78726E-03 ( -0.00185199 0.00175485 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.19 using 59 PHA bins.
# Reduced chi-squared = 0.8280 for 57 degrees of freedom
# Null hypothesis probability = 8.195694e-01
Photon flux (15-150 keV) in 1 sec: 0.894263 ( -0.206994 0.208287 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.62137e-08 ( -2.03665e-08 2.05433e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.064 sec. to 1.064 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.931783 ( -0.546894 0.426267 )
Epeak [keV] : 1.00000E+04 ( -10000 -10000 )
Norm@50keV : 7.83774E-03 ( -0.00185244 -0.00783771 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.22 using 59 PHA bins.
# Reduced chi-squared = 0.8432 for 56 degrees of freedom
# Null hypothesis probability = 7.921110e-01
Photon flux (15-150 keV) in 1 sec: 0.902722 ( -0.217272 0.200628 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.59292e-08 ( -2.01088e-08 1.95518e-08 ) ergs/cm2
Band function
Time interval is from 0.064 sec. to 1.064 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.855571 ( 0.855491 0.855491 )
beta : -0.936830 ( -0.45067 0.511626 )
Epeak [keV] : 14.4527 ( -14.2046 -14.2046 )
Norm@50keV : 1.15888E-02 ( -0.00549354 1.31324 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.19 using 59 PHA bins.
# Reduced chi-squared = 0.8581 for 55 degrees of freedom
# Null hypothesis probability = 7.637382e-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] : 29.4335 (-11.8855 29.8427)
R^2/D10^2 : 1.27546E-02 (-0.0124033 0.0465494)
(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 1.749e-09 1.099e-09
25- 50 1.070e-08 6.450e-09
50-150 6.597e-08 3.421e-08
15-150 7.843e-08 4.139e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-71.3975 -200)
Norm : 3.71975 (-0.847948 0.847948)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.268e-09 5.560e-09
25- 50 1.783e-08 1.048e-08
50-150 3.910e-08 2.321e-08
15-150 6.620e-08 3.913e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.63089 (-3.62713 6.08368)
R1^2/D10^2 : 0.325977 (-0.250104 1.75321)
kT2 [keV] : 198.517 (-159.732 -198.538)
R2^2/D10^2 : 2.33618E-04 (-8.05282e-05 0.0041799)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.593e-09 4.206e-09
25- 50 1.646e-08 9.515e-09
50-150 6.972e-08 6.405e-08
15-150 9.277e-08 6.485e-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: 0.830902 ( -0.43425 0.391466 )
Norm@50keV : 6.68355E-03 ( -0.00144825 0.00136588 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.52 using 59 PHA bins.
# Reduced chi-squared = 0.7810 for 57 degrees of freedom
# Null hypothesis probability = 8.856711e-01
Photon flux (15-150 keV) in 1.66 sec: 0.767460 ( -0.156177 0.157637 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.27998e-07 ( -2.58766e-08 2.60168e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.844748 ( -0.458938 0.375512 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 6.75854E-03 ( -0.00131365 0.00626343 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.55 using 59 PHA bins.
# Reduced chi-squared = 0.7955 for 56 degrees of freedom
# Null hypothesis probability = 8.647874e-01
Photon flux (15-150 keV) in 1.66 sec: 0.772311 ( -0.16187 0.15309 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.27856e-07 ( -2.57278e-08 1.26802e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.832983 ( 0.833388 0.833388 )
beta : -0.831091 ( -0.391351 0.434222 )
Epeak [keV] : 13.8080 ( -13.8035 -13.8035 )
Norm@50keV : 1.01233E-02 ( -0.00484414 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.52 using 59 PHA bins.
# Reduced chi-squared = 0.8094 for 55 degrees of freedom
# Null hypothesis probability = 8.429442e-01
Photon flux (15-150 keV) in 1.66 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) = 2.11e-08
S(50-100 keV) = 4.75e-08
T90 vs. Hardness ratio plot
T90 = 1.5239999294281 sec.
Hardness ratio (energy fluence ratio) = 2.25118
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.02045
Count Ratio (50-100 keV) / (15-25 keV) = 1.57961
Mask shadow pattern
IMX = -6.565863476528209E-01, IMY = -1.341348175330742E-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:
-239.504000 -0.460000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
255.9925 -37.7697 2.8 48.6 -25.8 3.1330 4.2 4.5 4U 1700-377
256.6221 -36.4539 11.7 48.7 -23.9 -0.7184 -1.0 9.2 GX 349+2
262.9799 -24.6183 12.4 49.1 -6.6 0.5451 0.9 7.8 GX 1+4
264.7607 -44.4840 4.0 40.4 -32.2 1.6350 2.9 2.2 4U 1735-44
270.3680 -24.9985 9.9 43.2 -2.3 0.6491 1.2 6.6 GX 5-1
270.1094 -25.7560 5.4 43.0 -3.4 1.1940 2.1 10.5 GRS 1758-258
274.0342 -13.9596 5.1 46.9 13.2 1.2797 2.3 4.9 GX 17+2
275.8256 -30.3751 4.8 36.4 -6.1 1.0629 2.4 5.2 H1820-303
285.1408 -25.0133 11.0 31.9 9.5 -0.4128 -1.1 8.0 HT1900.1-2455
262.9632 -33.7241 4.8 45.0 -17.7 1.4414 2.4 6.8 GX 354-0
10.9286 -18.8965 2.6 48.7 165.1 4.3928 4.5 ------ UNKNOWN
310.4620 -43.9788 2.5 8.4 -46.7 1.4560 4.6 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-0.460000 1.200000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
255.9637 -37.8381 136.7 48.6 -25.9 0.0031 0.1 1.1 4U 1700-377
256.6030 -36.4304 3.7 48.7 -23.9 0.1094 3.1 8.1 GX 349+2
263.0359 -24.8624 115.7 49.0 -6.9 -0.0032 -0.1 7.2 GX 1+4
264.8604 -44.3542 7.4 40.3 -32.0 0.0400 1.6 7.6 4U 1735-44
270.2537 -24.9283 10.4 43.3 -2.3 0.0269 1.1 9.2 GX 5-1
270.4497 -25.7009 6.1 42.8 -3.1 0.0461 1.9 8.4 GRS 1758-258
274.0258 -14.1580 3.9 46.8 13.0 -0.1006 -2.9 7.4 GX 17+2
275.8578 -30.4467 4.3 36.3 -6.2 0.0539 2.7 5.9 H1820-303
285.1032 -24.8398 8.2 32.0 9.7 0.0281 1.4 6.1 HT1900.1-2455
262.9581 -33.8601 4.3 44.9 -17.9 -0.0736 -2.7 2.2 GX 354-0
343.7911 -7.3676 2.2 38.4 125.4 0.1861 5.3 ------ UNKNOWN
2.5272 -14.9336 2.7 44.8 154.0 0.1650 4.4 ------ UNKNOWN
358.4273 -28.6315 1.1 33.8 168.5 0.2079 10.3 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
124.096600 438.776000
439.496000 484.076000
485.496000 715.395100
720.496000 837.256000
900.496000 962.539400
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
10.0950 -6.3044 3.6 24.9 -178.5 3.0545 3.2 ------ UNKNOWN
19.6477 -44.7621 3.6 23.3 -67.5 3.7457 3.2 ------ UNKNOWN
36.6273 -45.6976 2.3 34.5 -76.8 8.7812 5.0 ------ UNKNOWN
Plot creation:
Fri Aug 22 15:59:44 EDT 2025