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
35.4586 -82.7862 0.0045 32.8 -74.3 7.2336 42.6 TRIG_01336720
------------------------------------------
Foreground time interval of the image:
-1.772 9.504 (delta_t = 11.276 [sec])
Background time interval of the image:
-85.279 -1.772 (delta_t = 83.507 [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 -1.772 sec. to 9.504 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.15240 ( -0.0452846 0.0450751 )
Norm@50keV : 4.34089E-02 ( -0.00112511 0.0011238 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.20 using 59 PHA bins.
# Reduced chi-squared = 0.8631 for 57 degrees of freedom
# Null hypothesis probability = 7.591796e-01
Photon flux (15-150 keV) in 11.28 sec: 5.06380 ( -0.139471 0.139712 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.03704e-06 ( -1.33679e-07 1.33797e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -1.772 sec. to 9.504 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.806321 ( -0.192492 0.184605 )
Epeak [keV] : 207.167 ( -52.5314 158.655 )
Norm@50keV : 6.08922E-02 ( -0.00982621 0.0121839 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.63 using 59 PHA bins.
# Reduced chi-squared = 0.6899 for 56 degrees of freedom
# Null hypothesis probability = 9.628872e-01
Photon flux (15-150 keV) in 11.28 sec: 4.97253 ( -0.14635 0.14692 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.98232e-06 ( -1.39037e-07 1.38485e-07 ) ergs/cm2
Band function
Time interval is from -1.772 sec. to 9.504 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.718216 ( -0.260465 0.84583 )
beta : -1.38812 ( 1.38403 0.171731 )
Epeak [keV] : 165.418 ( -109.773 174.009 )
Norm@50keV : 6.77389E-02 ( -0.0163759 0.278814 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.40 using 59 PHA bins.
# Reduced chi-squared = 0.6982 for 55 degrees of freedom
# Null hypothesis probability = 9.565935e-01
Photon flux (15-150 keV) in 11.28 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] : 21.4832 ( )
R^2/D10^2 : 0.188260 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 268.81 using 59 PHA bins.
# Reduced chi-squared = 4.7160 for 57 degrees of freedom
# Null hypothesis probability = 3.157537e-29
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.833e-07 9.193e-09
25- 50 9.557e-07 3.598e-08
50-150 3.293e-06 1.297e-07
15-150 4.432e-06 1.297e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 21.6726 ( )
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.087e-07 1.534e-08
25- 50 1.171e-06 3.158e-08
50-150 2.568e-06 6.994e-08
15-150 4.348e-06 1.179e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.66304 (-1.09197 1.23403)
R1^2/D10^2 : 1.88502 (-0.603501 0.983337)
kT2 [keV] : 32.7042 (-3.03009 4.33459)
R2^2/D10^2 : 4.03636E-02 (-0.0139686 0.0163484)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.763e-07 4.168e-08
25- 50 1.069e-06 8.003e-08
50-150 3.552e-06 2.577e-07
15-150 4.997e-06 2.606e-07
Peak spectrum fit
Power-law model
Time interval is from 0.060 sec. to 1.060 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.08917 ( -0.0745902 0.074147 )
Norm@50keV : 0.108042 ( -0.00478448 0.004782 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.53 using 59 PHA bins.
# Reduced chi-squared = 1.132 for 57 degrees of freedom
# Null hypothesis probability = 2.302657e-01
Photon flux (15-150 keV) in 1 sec: 12.5193 ( -0.569557 0.569908 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.13354e-06 ( -5.44169e-08 5.45134e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.060 sec. to 1.060 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.673371 ( -0.328319 0.306303 )
Epeak [keV] : 182.783 ( -56.2472 317.731 )
Norm@50keV : 0.166487 ( -0.0444419 0.065302 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.06 using 59 PHA bins.
# Reduced chi-squared = 1.055 for 56 degrees of freedom
# Null hypothesis probability = 3.643280e-01
Photon flux (15-150 keV) in 1 sec: 12.3551 ( -0.5814 0.5818 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.11788e-06 ( -5.688e-08 5.661e-08 ) ergs/cm2
Band function
Time interval is from 0.060 sec. to 1.060 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99989 ( -4.99989 -4.99989 )
beta : -1.18134 ( -0.111545 0.0874576 )
Epeak [keV] : 31.0474 ( -31.0474 3.57191 )
Norm@50keV : 2228.91 ( -98.0327 1.87808e+07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.22 using 59 PHA bins.
# Reduced chi-squared = 1.131 for 55 degrees of freedom
# Null hypothesis probability = 2.347811e-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] : 20.6769 ( )
R^2/D10^2 : 0.546667 ( )
(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 4.445e-08 4.175e-09
25- 50 2.262e-07 1.470e-08
50-150 7.199e-07 5.145e-08
15-150 9.906e-07 5.075e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 51.3555 ( )
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.279e-07 6.100e-09
25- 50 2.460e-07 1.230e-08
50-150 5.395e-07 2.540e-08
15-150 9.134e-07 4.500e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.69182 (-2.22847 2.64476)
R1^2/D10^2 : 3.34272 (-1.49373 3.54428)
kT2 [keV] : 35.2533 (-6.82203 17.8178)
R2^2/D10^2 : 7.87977E-02 (-0.0569279 0.0887729)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.702e-08 1.351e-08
25- 50 2.407e-07 3.435e-08
50-150 8.041e-07 2.111e-07
15-150 1.122e-06 2.468e-07
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: 1.15240 ( -0.0452846 0.0450751 )
Norm@50keV : 4.34089E-02 ( -0.00112511 0.0011238 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.20 using 59 PHA bins.
# Reduced chi-squared = 0.8631 for 57 degrees of freedom
# Null hypothesis probability = 7.591796e-01
Photon flux (15-150 keV) in 11.28 sec: 5.06380 ( -0.139471 0.139712 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.03704e-06 ( -1.33679e-07 1.33797e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.806321 ( -0.192492 0.184605 )
Epeak [keV] : 207.167 ( -52.5314 158.655 )
Norm@50keV : 6.08922E-02 ( -0.00982621 0.0121839 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.63 using 59 PHA bins.
# Reduced chi-squared = 0.6899 for 56 degrees of freedom
# Null hypothesis probability = 9.628872e-01
Photon flux (15-150 keV) in 11.28 sec: 4.97253 ( -0.14635 0.14692 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.98232e-06 ( -1.39037e-07 1.38485e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.718216 ( -0.260465 1.05405 )
beta : -1.38812 ( 1.38403 0.171826 )
Epeak [keV] : 165.418 ( -109.773 174.009 )
Norm@50keV : 6.77389E-02 ( -0.0163759 0.278814 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.40 using 59 PHA bins.
# Reduced chi-squared = 0.6982 for 55 degrees of freedom
# Null hypothesis probability = 9.565935e-01
Photon flux (15-150 keV) in 11.28 sec: 0.344738 ( ) 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) = 1.03e-06
S(50-100 keV) = 1.85e-06
T90 vs. Hardness ratio plot
T90 = 9.58399999141693 sec.
Hardness ratio (energy fluence ratio) = 1.79612
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.80743
Count Ratio (50-100 keV) / (15-25 keV) = 1.86082
Mask shadow pattern
IMX = 1.742698898567920E-01, IMY = 6.193650373237246E-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:
-85.279400 -1.772000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
255.9625 -37.8670 6.3 43.8 26.9 0.5544 1.8 1.8 4U 1700-377
256.5472 -36.3582 19.5 44.6 28.9 0.1797 0.6 6.7 GX 349+2
264.7783 -44.3232 13.9 34.6 26.5 0.1739 0.8 7.8 4U 1735-44
270.4869 -25.5927 0.0 45.5 51.6 1.0762 1.8 13.4 GRS 1758-258
276.0722 -30.3325 3.7 38.7 53.6 1.0600 3.1 7.9 H1820-303
284.9878 -24.8404 11.5 39.3 68.9 0.5294 1.0 5.5 HT1900.1-2455
262.8680 -33.7112 38.4 43.1 37.0 0.0965 0.3 9.6 GX 354-0
10.6018 -21.8056 2.7 52.0 -170.2 1.7294 4.2 ------ UNKNOWN
206.4122 -55.7605 2.1 54.7 -21.0 2.6531 5.5 ------ UNKNOWN
46.8257 -81.2335 2.2 34.5 -76.8 1.4118 5.2 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-1.772000 9.504000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
255.9817 -37.8608 56.0 43.8 27.0 -0.0302 -0.2 1.0 4U 1700-377
256.5495 -36.3933 13.2 44.6 28.9 -0.1289 -0.9 5.8 GX 349+2
264.9342 -44.3392 36.0 34.5 26.6 0.0321 0.3 10.6 4U 1735-44
270.1957 -25.8423 26.1 45.4 51.1 0.1082 0.4 8.3 GRS 1758-258
276.0223 -30.2261 139.0 38.9 53.7 0.0116 0.1 9.8 H1820-303
285.0204 -24.9866 5.9 39.1 68.8 0.3570 2.0 4.1 HT1900.1-2455
262.8873 -33.7043 496.2 43.1 37.0 -0.0032 -0.0 9.3 GX 354-0
334.1958 -11.5178 2.9 46.8 141.9 0.7984 4.0 ------ UNKNOWN
227.0102 -56.5505 2.5 46.0 -11.2 0.5791 4.7 ------ UNKNOWN
35.4586 -82.7862 0.3 32.8 -74.3 7.2332 42.6 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
204.920600 288.060000
289.520000 293.290000
294.520000 588.020600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
256.0024 -37.7411 5.7 50.4 20.5 2.1436 2.0 6.2 4U 1700-377
256.4338 -36.3271 6.0 51.0 22.2 2.3256 1.9 5.8 GX 349+2
264.6846 -44.3389 3.7 41.3 18.0 2.5815 3.1 7.1 4U 1735-44
276.0944 -30.2826 3.6 42.4 43.1 -3.9883 -3.2 10.1 H1820-303
285.1762 -25.0319 0.0 40.5 57.4 0.8996 0.6 10.1 HT1900.1-2455
262.8669 -33.9486 6.2 48.5 28.9 1.9627 1.9 9.1 GX 354-0
232.2283 -57.1351 2.7 51.9 -11.6 4.4448 4.2 ------ UNKNOWN
25.3754 -75.7534 2.8 34.4 -76.9 3.6648 4.1 ------ UNKNOWN
Plot creation:
Sat Jul 26 04:44:53 EDT 2025