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
233.0341 -53.3141 0.0150 10.2 -78.9 0.7046 12.7 TRIG_01340954
------------------------------------------
Foreground time interval of the image:
1.012 20.940 (delta_t = 19.928 [sec])
Background time interval of the image:
-239.648 -226.588 (delta_t = 13.060 [sec])
-224.648 -192.358 (delta_t = 32.290 [sec])
-190.648 -43.318 (delta_t = 147.330 [sec])
-42.648 1.012 (delta_t = 43.660 [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 16.384000
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 16.384000
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 16.384000
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 1.012 sec. to 20.940 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.82669 ( -0.198947 0.206761 )
Norm@50keV : 2.15160E-03 ( -0.000291476 0.000286582 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.39 using 59 PHA bins.
# Reduced chi-squared = 0.7612 for 57 degrees of freedom
# Null hypothesis probability = 9.081443e-01
Photon flux (15-150 keV) in 19.93 sec: 0.299609 ( -0.0349532 0.0349708 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.94461e-07 ( -5.33363e-08 5.44155e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.012 sec. to 20.940 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.642644 ( -1.23776 0.945797 )
Epeak [keV] : 47.9524 ( -9.54458 30.8635 )
Norm@50keV : 1.03127E-02 ( -0.0103133 0.0441349 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.59 using 59 PHA bins.
# Reduced chi-squared = 0.6892 for 56 degrees of freedom
# Null hypothesis probability = 9.632716e-01
Photon flux (15-150 keV) in 19.93 sec: 0.287352 ( -0.03608 0.036193 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.51009e-07 ( -5.71812e-08 6.25085e-08 ) ergs/cm2
Band function
Time interval is from 1.012 sec. to 20.940 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.81624 ( -0.753707 1.13912 )
beta : -2.25085 ( 9.37167 19.3717 )
Epeak [keV] : 32.5781 ( -11.1787 31.3586 )
Norm@50keV : 0.579441 ( -0.559262 59.1598 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.55 using 59 PHA bins.
# Reduced chi-squared = 0.6828 for 55 degrees of freedom
# Null hypothesis probability = 9.653285e-01
Photon flux (15-150 keV) in 19.93 sec: 0.290308 ( 6.70969 -0.035872 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.69634e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.7745 (-1.31014 1.5263)
R^2/D10^2 : 0.109847 (-0.0434357 0.0696513)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.82 using 59 PHA bins.
# Reduced chi-squared = 0.8038 for 57 degrees of freedom
# Null hypothesis probability = 8.557046e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.287e-08 1.097e-08
25- 50 1.455e-07 2.115e-08
50-150 9.389e-08 2.506e-08
15-150 2.923e-07 4.594e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 85.2375 (-26.7226 52.1418)
Norm : 1.39440 (-0.221115 0.272042)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.236e-08 1.187e-08
25- 50 1.209e-07 1.674e-08
50-150 1.779e-07 8.949e-08
15-150 3.712e-07 8.889e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.43674 (-2.97259 2.6223)
R1^2/D10^2 : 0.307031 (-0.179305 0.686687)
kT2 [keV] : 21.3337 (-16.9571 101.916)
R2^2/D10^2 : 4.86354E-03 (-0.00472535 0.028377)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.592e-08 3.293e-08
25- 50 1.315e-07 6.779e-08
50-150 1.641e-07 9.602e-08
15-150 3.615e-07 1.785e-07
Peak spectrum fit
Power-law model
Time interval is from 11.576 sec. to 12.576 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.79251 ( -0.456545 0.505437 )
Norm@50keV : 4.07759E-03 ( -0.0012928 0.0012452 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 79.85 using 59 PHA bins.
# Reduced chi-squared = 1.401 for 57 degrees of freedom
# Null hypothesis probability = 2.458262e-02
Photon flux (15-150 keV) in 1 sec: 0.560259 ( -0.154932 0.1552 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.75491e-08 ( -1.16791e-08 1.2137e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 11.576 sec. to 12.576 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.504833 ( -3.36911 1.68264 )
Epeak [keV] : 53.6889 ( )
Norm@50keV : 1.99304E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 78.58 using 59 PHA bins.
# Reduced chi-squared = 1.403 for 56 degrees of freedom
# Null hypothesis probability = 2.494864e-02
Photon flux (15-150 keV) in 1 sec: 0.535032 ( -0.160881 0.16026 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.45382e-08 ( -1.1642e-08 1.29116e-08 ) ergs/cm2
Band function
Time interval is from 11.576 sec. to 12.576 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.555731 ( -1.44587 5.28806 )
beta : -9.37164 ( 9.37167 19.3717 )
Epeak [keV] : 54.4802 ( -21.4519 450.763 )
Norm@50keV : 1.85719E-02 ( -0.0185704 1.2042e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 78.58 using 59 PHA bins.
# Reduced chi-squared = 1.429 for 55 degrees of freedom
# Null hypothesis probability = 2.013838e-02
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] : 12.3176 (-3.37945 4.84191)
R^2/D10^2 : 0.126620 (-0.126605 0.287595)
(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 4.070e-09 2.522e-09
25- 50 1.320e-08 7.172e-09
50-150 1.225e-08 8.585e-09
15-150 2.953e-08 1.854e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 97.2774 (-54.5323 -97.2608)
Norm : 2.52478 (-0.795655 1.21155)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.598e-09 4.088e-09
25- 50 1.135e-08 6.785e-09
50-150 1.810e-08 1.422e-08
15-150 3.604e-08 2.441e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.68718 (-2.6595 61.3075)
R1^2/D10^2 : 30.5626 (-44.6733 -44.6733)
kT2 [keV] : 14.1129 (-4.20686 -13.9584)
R2^2/D10^2 : 7.21099E-02 (-0.0749157 0.216252)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.820e-09 2.927e-09
25- 50 1.164e-08 6.830e-09
50-150 1.497e-08 1.002e-08
15-150 3.242e-08 1.852e-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: 1.82669 ( -0.198947 0.206761 )
Norm@50keV : 2.15160E-03 ( -0.000291476 0.000286582 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.39 using 59 PHA bins.
# Reduced chi-squared = 0.7612 for 57 degrees of freedom
# Null hypothesis probability = 9.081443e-01
Photon flux (15-150 keV) in 19.93 sec: 0.299609 ( -0.0349532 0.0349708 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.94461e-07 ( -5.33363e-08 5.44155e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.642644 ( -1.23776 0.945797 )
Epeak [keV] : 47.9524 ( -9.54458 30.8635 )
Norm@50keV : 1.03127E-02 ( -0.0103133 0.0441349 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.59 using 59 PHA bins.
# Reduced chi-squared = 0.6892 for 56 degrees of freedom
# Null hypothesis probability = 9.632716e-01
Photon flux (15-150 keV) in 19.93 sec: 0.287352 ( -0.03608 0.036193 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.51009e-07 ( -5.71812e-08 6.25085e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.81624 ( -0.753707 1.13912 )
beta : -2.25085 ( 9.37167 19.3717 )
Epeak [keV] : 32.5781 ( -11.1787 31.3586 )
Norm@50keV : 0.579441 ( -0.559262 59.1438 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.55 using 59 PHA bins.
# Reduced chi-squared = 0.6828 for 55 degrees of freedom
# Null hypothesis probability = 9.653285e-01
Photon flux (15-150 keV) in 19.93 sec: 0.290308 ( 6.70969 -0.035872 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.69634e-07 ( 0 0 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 1.12e-07
S(50-100 keV) = 1.26e-07
T90 vs. Hardness ratio plot
T90 = 17.7879998683929 sec.
Hardness ratio (energy fluence ratio) = 1.125
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.26372
Count Ratio (50-100 keV) / (15-25 keV) = 0.626483
Mask shadow pattern
IMX = 3.469272219396027E-02, IMY = 1.762589345956470E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 16.384000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 16.384000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 16.384000
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:
-239.648000 -226.588000
-224.648000 -192.358000
-190.648000 -43.318000
-42.648000 1.012000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.4967 -60.7358 11.8 41.0 -117.1 1.2172 1.0 8.6 Cen X-3
187.0581 -62.7657 0.0 32.9 -115.6 0.5096 0.8 11.0 GX 301-2
244.9921 -15.6253 0.9 38.3 7.7 9.1946 12.8 1.2 Sco X-1
256.0326 -37.8618 2.0 16.4 32.3 2.3006 5.9 2.4 4U 1700-377
256.3414 -36.4166 11.1 17.8 32.1 0.4164 1.0 4.6 GX 349+2
262.9782 -24.7143 19.7 30.6 39.0 -0.3343 -0.6 2.5 GX 1+4
264.7033 -44.4459 7.1 13.2 67.1 0.7116 1.6 1.7 4U 1735-44
270.2264 -25.2522 21.7 32.2 51.4 0.3793 0.5 10.8 GX 5-1
270.4913 -25.7503 4.2 31.8 52.1 1.9386 2.8 10.2 GRS 1758-258
273.8582 -14.0727 8.3 43.8 50.0 -1.9871 -1.4 8.9 GX 17+2
275.8979 -30.2662 4.8 29.9 64.4 1.8657 2.4 6.2 H1820-303
284.9812 -25.0629 6.0 38.6 71.7 -3.0707 -1.9 9.0 HT1900.1-2455
262.9598 -34.0015 3.4 21.7 45.5 1.4746 3.4 10.1 GX 354-0
250.6811 -18.7386 2.2 35.0 16.6 3.0245 5.2 ------ UNKNOWN
159.9351 -61.8733 2.6 44.8 -122.2 7.9099 4.4 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
1.012000 20.940000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.1904 -60.7659 4.5 41.1 -117.2 -0.4295 -2.5 9.3 Cen X-3
186.8036 -62.8243 21.0 33.0 -115.8 0.0494 0.5 5.2 GX 301-2
244.8706 -15.7072 92.7 38.2 7.5 -0.0105 -0.1 7.5 Sco X-1
255.9792 -37.7286 3.3 16.5 32.1 0.1933 3.5 6.9 4U 1700-377
256.4116 -36.3554 7.5 17.9 32.2 -0.0863 -1.5 4.2 GX 349+2
262.9263 -24.7903 4.0 30.5 39.0 -0.2299 -2.9 5.2 GX 1+4
264.6492 -44.6463 0.0 13.1 67.6 -0.1463 -2.6 12.4 4U 1735-44
270.0952 -25.0065 7.3 32.3 51.0 0.1483 1.6 11.2 GX 5-1
270.2519 -25.7267 4.4 31.7 51.7 -0.2385 -2.7 2.9 GRS 1758-258
273.8483 -13.9581 13.0 43.9 49.9 0.1935 0.9 10.3 GX 17+2
275.9233 -30.2561 8.6 29.9 64.5 -0.1211 -1.3 6.7 H1820-303
285.0541 -25.0554 6.8 38.6 71.8 0.3295 1.7 8.2 HT1900.1-2455
262.8124 -33.8652 8.4 21.8 45.0 0.0895 1.4 9.0 GX 354-0
233.0341 -53.3141 0.9 10.2 -78.9 0.7046 12.7 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
110.852600 962.415100
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.2614 -60.6298 2.5 33.6 -134.8 8.7170 4.7 1.7 Cen X-3
186.4226 -62.6822 8.5 25.8 -136.7 2.0032 1.3 8.3 GX 301-2
245.0063 -15.6547 1.0 38.8 11.8 28.9218 12.0 1.8 Sco X-1
256.0861 -37.8459 2.5 22.1 48.3 7.0006 4.6 4.7 4U 1700-377
256.3135 -36.3583 12.4 23.4 46.4 1.5015 0.9 7.1 GX 349+2
262.9778 -24.7607 109.1 36.3 43.2 -0.3071 -0.1 1.9 GX 1+4
264.8861 -44.4602 4.8 22.5 73.1 4.2230 2.4 6.2 4U 1735-44
270.4219 -25.1872 6.6 39.6 52.9 6.2016 1.7 9.9 GX 5-1
270.3769 -25.6702 5.8 39.1 53.2 7.2191 2.0 5.9 GRS 1758-258
275.9011 -30.5036 21.3 38.3 64.1 -2.4933 -0.5 8.3 H1820-303
263.0344 -33.9665 21.2 28.7 53.0 1.1186 0.5 8.2 GX 354-0
260.9497 -51.9205 2.4 16.9 89.9 7.5359 4.8 ------ UNKNOWN
158.9920 -48.5866 2.7 44.8 -122.2 26.9183 4.2 ------ UNKNOWN
Plot creation:
Sun Aug 10 19:59:50 EDT 2025