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
244.9478 -54.8041 0.0402 43.2 -5.4 0.0893 4.8 TRIG_01404295
------------------------------------------
Foreground time interval of the image:
0.000 1.024 (delta_t = 1.024 [sec])
Background time interval of the image:
-239.320 -55.168 (delta_t = 184.152 [sec])
-54.320 -8.320 (delta_t = 46.000 [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
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 0.000 sec. to 1.024 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.95514 ( -0.792399 0.958789 )
Norm@50keV : 2.64568E-03 ( -0.00166081 0.00215331 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.04 using 59 PHA bins.
# Reduced chi-squared = 1.299 for 57 degrees of freedom
# Null hypothesis probability = 6.410266e-02
Photon flux (15-150 keV) in 1.024 sec: 0.704350 ( -0.249372 0.252236 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.19015e-08 ( -1.32126e-08 1.59121e-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: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 1.25237E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 81.24 using 59 PHA bins.
# Reduced chi-squared = 1.451 for 56 degrees of freedom
# Null hypothesis probability = 1.539935e-02
Photon flux (15-150 keV) in 1.024 sec: 0.777309 0.776633 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 7.12345e-16 ( 0 0 ) 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 : 3.95953 ( 1.15363 1.15363 )
beta : -9.37167 ( 8.85351 5.74751 )
Epeak [keV] : 19.7611 ( -3.80928 4.57161 )
Norm@50keV : 915.171 ( -932.519 6222.76 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.59 using 59 PHA bins.
# Reduced chi-squared = 1.211 for 55 degrees of freedom
# Null hypothesis probability = 1.359856e-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] : 4.57199 (-0.95007 1.22916)
R^2/D10^2 : 10.1051 (-10.0005 20.7584)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.57 using 59 PHA bins.
# Reduced chi-squared = 1.203 for 57 degrees of freedom
# Null hypothesis probability = 1.401938e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.735e-08 1.027e-08
25- 50 9.025e-09 5.965e-09
50-150 2.334e-10 2.894e-10
15-150 2.661e-08 1.648e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.4652 (-5.31287 14.1107)
Norm : 14.4398 (-4.87584 4.87584)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.560e-08 2.192e-08
25- 50 9.583e-09 2.316e-08
50-150 1.357e-09 1.204e-08
15-150 2.654e-08 5.243e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.51718 (-0.9354 1.24309)
R1^2/D10^2 : 10.5539 (-9.89062 20.8641)
kT2 [keV] : 200.000 (-200 -200)
R2^2/D10^2 : 5.83609E-05 (-5.83098e-05 -5.83098e-05)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
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: 2.95514 ( -0.792399 0.958789 )
Norm@50keV : 2.64568E-03 ( -0.00166081 0.00215331 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.04 using 59 PHA bins.
# Reduced chi-squared = 1.299 for 57 degrees of freedom
# Null hypothesis probability = 6.410266e-02
Photon flux (15-150 keV) in 1.024 sec: 0.704350 ( -0.249372 0.252236 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.19015e-08 ( -1.32126e-08 1.59121e-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: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 1.25237E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 81.24 using 59 PHA bins.
# Reduced chi-squared = 1.451 for 56 degrees of freedom
# Null hypothesis probability = 1.539935e-02
Photon flux (15-150 keV) in 1.024 sec: 0.777309 0.776633 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 7.12345e-16 ( 0 0 ) 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 : 3.95953 ( 1.15363 1.15363 )
beta : -9.37167 ( 8.85351 5.74751 )
Epeak [keV] : 19.7611 ( -3.80928 4.57161 )
Norm@50keV : 915.171 ( -932.519 6222.76 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.59 using 59 PHA bins.
# Reduced chi-squared = 1.211 for 55 degrees of freedom
# Null hypothesis probability = 1.359856e-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] : 4.57199 (-0.95007 1.22916)
R^2/D10^2 : 10.1051 (-10.0005 20.7584)
(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 1.735e-08 1.051e-08
25- 50 9.025e-09 6.292e-09
50-150 2.334e-10 2.542e-10
15-150 2.661e-08 1.566e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.4652 (-5.31287 14.1107)
Norm : 14.4398 (-4.87584 4.87584)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.560e-08 2.099e-08
25- 50 9.583e-09 2.058e-08
50-150 1.357e-09 9.533e-09
15-150 2.654e-08 5.688e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.51718 (-0.9354 1.24309)
R1^2/D10^2 : 10.5539 (-9.89062 20.8641)
kT2 [keV] : 200.000 (-200 -200)
R2^2/D10^2 : 5.83609E-05 (-5.83098e-05 -5.83098e-05)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
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: 2.95514 ( -0.792399 0.958789 )
Norm@50keV : 2.64568E-03 ( -0.00166081 0.00215331 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.04 using 59 PHA bins.
# Reduced chi-squared = 1.299 for 57 degrees of freedom
# Null hypothesis probability = 6.410266e-02
Photon flux (15-150 keV) in 1.024 sec: 0.704350 ( -0.249372 0.252236 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.19015e-08 ( -1.32126e-08 1.59121e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 1.25237E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 81.24 using 59 PHA bins.
# Reduced chi-squared = 1.451 for 56 degrees of freedom
# Null hypothesis probability = 1.539935e-02
Photon flux (15-150 keV) in 1.024 sec: 0.777309 0.776633 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 7.12345e-16 ( 0 0 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.95953 ( 1.15363 1.15363 )
beta : -9.37167 ( 8.85351 5.74751 )
Epeak [keV] : 19.7611 ( -3.80928 4.57161 )
Norm@50keV : 915.171 ( -932.519 6222.76 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.59 using 59 PHA bins.
# Reduced chi-squared = 1.211 for 55 degrees of freedom
# Null hypothesis probability = 1.359856e-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) = 1.07e-08
S(50-100 keV) = 5.50e-09
T90 vs. Hardness ratio plot
T90 = 1.0239999294281 sec.
Hardness ratio (energy fluence ratio) = 0.514019
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.248168
Count Ratio (50-100 keV) / (15-25 keV) = 0.00945169
Mask shadow pattern
IMX = 9.337969050607864E-01, IMY = 8.892400256863661E-02
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:
-239.320000 -55.167700
-54.320000 -8.320000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.5751 -40.5569 4.3 26.5 145.7 1.7194 2.7 2.1 Vela X-1
170.3363 -60.8312 0.0 10.9 50.7 -0.5310 -1.1 12.5 Cen X-3
186.8394 -62.6501 11.8 15.3 20.4 0.4782 1.0 8.8 GX 301-2
256.0384 -37.9256 23.7 58.9 -18.0 -1.5700 -0.5 5.5 4U 1700-377
108.7940 -37.9250 2.2 45.1 129.2 12.2215 5.2 ------ UNKNOWN
338.1429 -83.1389 2.7 46.7 46.4 7.4827 4.2 ------ UNKNOWN
311.1753 -81.1142 2.9 47.1 40.8 6.3908 4.1 ------ UNKNOWN
144.5402 -31.9548 2.6 26.7 170.9 2.4656 4.4 ------ UNKNOWN
266.2316 -49.6244 3.1 56.9 -1.8 8.4973 3.7 ------ UNKNOWN
162.2982 -13.2530 2.4 37.4 -145.7 3.5303 4.8 ------ UNKNOWN
162.4707 2.6306 2.3 53.1 -142.3 11.1532 5.0 ------ 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] [']
135.7603 -40.6312 0.0 26.3 145.7 0.0114 0.8 11.5 Vela X-1
170.3363 -60.8312 0.0 10.9 50.7 0.0191 1.7 12.5 Cen X-3
187.0155 -62.6923 9.6 15.4 20.3 0.0134 1.2 10.9 GX 301-2
255.7754 -37.7827 7.2 58.9 -18.3 0.1233 1.6 10.7 4U 1700-377
219.8611 -73.6804 2.5 31.3 24.6 0.0679 4.6 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
109.780600 519.260000
520.680000 747.400000
748.680000 962.778900
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.4221 -60.5082 210.7 38.1 -165.0 0.0930 0.1 7.6 Cen X-3
186.8281 -62.8223 4.0 30.0 -164.4 4.3276 2.9 5.6 GX 301-2
245.0101 -15.6332 0.8 39.2 -35.3 28.7372 13.6 1.8 Sco X-1
255.8107 -37.9417 6.7 18.4 -7.5 2.1422 1.7 10.2 4U 1700-377
256.3765 -36.5555 66.0 19.9 -7.6 -0.2281 -0.2 8.4 GX 349+2
263.1272 -24.8144 4.5 32.9 -4.0 3.8733 2.6 7.6 GX 1+4
264.7811 -44.3372 10.4 16.5 23.2 1.3111 1.1 7.0 4U 1735-44
268.4472 -1.4774 8.0 56.7 -6.9 5.6977 1.4 5.0 SW J1753.5-0127
270.3829 -25.0286 5.3 35.2 7.0 3.8892 2.2 6.2 GX 5-1
270.1270 -25.8372 11.8 34.4 7.3 -1.6822 -1.0 11.0 GRS 1758-258
273.9364 -13.8918 21.3 46.7 4.8 1.3550 0.5 9.6 GX 17+2
275.9218 -30.3589 5.3 32.9 19.3 4.2561 2.1 0.5 H1820-303
284.9673 -24.9084 24.4 41.9 25.5 1.5494 0.5 3.8 HT1900.1-2455
263.1186 -33.8552 204.8 24.5 3.2 -0.0808 -0.1 6.6 GX 354-0
282.5592 -16.1807 3.5 48.2 16.4 8.3127 3.3 ------ UNKNOWN
276.3629 -4.1252 2.9 56.7 3.1 14.1397 4.0 ------ UNKNOWN
203.1440 -44.4409 3.3 28.5 -121.5 5.6657 3.6 ------ UNKNOWN
Plot creation:
Thu Oct 16 19:22:42 EDT 2025