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
251.7531 -45.8839 0.0201 25.2 -81.1 0.0576 9.5 TRIG_01337165
------------------------------------------
Foreground time interval of the image:
0.000 0.060 (delta_t = 0.060 [sec])
Background time interval of the image:
-51.999 0.000 (delta_t = 51.999 [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 0.064000
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 0.064000
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 0.064000
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 0.060 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.24894 ( -0.235284 0.300676 )
Norm@50keV : 1.41990E-02 ( -0.00418651 0.00401123 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 86.25 using 59 PHA bins.
# Reduced chi-squared = 1.513 for 57 degrees of freedom
# Null hypothesis probability = 7.447555e-03
Photon flux (15-150 keV) in 0.06 sec: 4.70735 ( -1.08752 1.08718 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.15936e-08 ( -2.69219e-09 2.69096e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.060 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 3.66910E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 116.71 using 59 PHA bins.
# Reduced chi-squared = 2.0841 for 56 degrees of freedom
# Null hypothesis probability = 3.655235e-06
Photon flux (15-150 keV) in 0.06 sec: 7.08890 ( -1.31787 1.31214 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.08934e-08 ( -3.7401e-09 3.74028e-09 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.060 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.17059 ( -2.58039 -4.17365 )
beta : -10.0000 ( 10 10 )
Epeak [keV] : 33.7847 ( -2.98328 2.7705 )
Norm@50keV : 482.301 ( -481.388 652.952 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.26 using 59 PHA bins.
# Reduced chi-squared = 0.9320 for 55 degrees of freedom
# Null hypothesis probability = 6.182617e-01
Photon flux (15-150 keV) in 0.06 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] : 8.07567 (-0.824705 0.82386)
R^2/D10^2 : 8.70507 (-3.21043 4.94471)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.60 using 59 PHA bins.
# Reduced chi-squared = 0.9404 for 57 degrees of freedom
# Null hypothesis probability = 6.032337e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.202e-09 1.707e-09
25- 50 1.103e-08 2.355e-09
50-150 2.988e-09 1.157e-09
15-150 2.022e-08 4.392e-09
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 25.7501 (-5.24608 5.61298)
Norm : 59.9351 (-16.0717 20.0598)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.711e-09 1.613e-09
25- 50 7.009e-09 1.617e-09
50-150 3.111e-09 1.380e-09
15-150 1.683e-08 3.759e-09
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 200.000 (-200 -200)
R1^2/D10^2 : 5.77771E-06 (-5.7777e-06 -5.7777e-06)
kT2 [keV] : 8.05785 (-0.822882 0.820215)
R2^2/D10^2 : 8.77149 (-3.22776 4.97877)
------------------------------------------------------------
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 -0.468 sec. to 0.532 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.12813 ( -0.667265 0.855573 )
Norm@50keV : 2.89150E-03 ( -0.00161143 0.00155946 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.84 using 59 PHA bins.
# Reduced chi-squared = 1.102 for 57 degrees of freedom
# Null hypothesis probability = 2.772794e-01
Photon flux (15-150 keV) in 1 sec: 0.461482 ( -0.210898 0.21168 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.68984e-08 ( -1.32641e-08 1.39996e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.468 sec. to 0.532 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -4.72262 ( 6.75531 7.99859 )
Epeak [keV] : 38.7693 ( -9.47624 14.8376 )
Norm@50keV : 28.3047 ( -27.843 53007 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.54 using 59 PHA bins.
# Reduced chi-squared = 1.045 for 56 degrees of freedom
# Null hypothesis probability = 3.823630e-01
Photon flux (15-150 keV) in 1 sec: 0.427933 ( -0.192644 0.211438 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.36206e-08 ( -1.02827e-08 1.19612e-08 ) ergs/cm2
Band function
Time interval is from -0.468 sec. to 0.532 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.58922 ( -5.81955 -4.58922 )
beta : -9.37167 ( 9.37167 19.3335 )
Epeak [keV] : 39.1990 ( -8.95707 10.7596 )
Norm@50keV : 22.1914 ( -8.78745 320.592 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.55 using 59 PHA bins.
# Reduced chi-squared = 1.065 for 55 degrees of freedom
# Null hypothesis probability = 3.464842e-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] : 10.0770 (-2.828 3.94287)
R^2/D10^2 : 0.252054 (-0.251957 0.629255)
(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 5.226e-09 3.358e-09
25- 50 1.313e-08 8.415e-09
50-150 7.009e-09 5.230e-09
15-150 2.537e-08 1.688e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 49.9002 (-28.7094 132.132)
Norm : 2.80046 (-1.47755 2.65079)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.844e-09 4.366e-09
25- 50 9.823e-09 6.315e-09
50-150 9.519e-09 8.310e-09
15-150 2.619e-08 1.752e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 0.923139 (-0.929316 13.063)
R1^2/D10^2 : 2.19113E+05 (-187323 -187323)
kT2 [keV] : 10.1529 (-2.88578 58.92)
R2^2/D10^2 : 0.242916 (-0.242818 0.631427)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.247e-09 3.462e-09
25- 50 1.302e-08 8.125e-09
50-150 7.098e-09 5.370e-09
15-150 2.536e-08 1.684e-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: 3.24894 ( -0.235284 0.300676 )
Norm@50keV : 1.41990E-02 ( -0.00418651 0.00401123 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 86.25 using 59 PHA bins.
# Reduced chi-squared = 1.513 for 57 degrees of freedom
# Null hypothesis probability = 7.447555e-03
Photon flux (15-150 keV) in 0.06 sec: 4.70735 ( -1.08752 1.08718 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.15936e-08 ( -2.69219e-09 2.69096e-09 ) 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 : 3.66910E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 116.71 using 59 PHA bins.
# Reduced chi-squared = 2.0841 for 56 degrees of freedom
# Null hypothesis probability = 3.655235e-06
Photon flux (15-150 keV) in 0.06 sec: 7.08890 ( -1.31787 1.31214 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.08934e-08 ( -3.7401e-09 3.74028e-09 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.17059 ( -2.58039 -4.17365 )
beta : -10.0000 ( 10 10 )
Epeak [keV] : 33.7847 ( -2.98328 2.7705 )
Norm@50keV : 482.301 ( -481.388 652.952 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.26 using 59 PHA bins.
# Reduced chi-squared = 0.9320 for 55 degrees of freedom
# Null hypothesis probability = 6.182617e-01
Photon flux (15-150 keV) in 0.06 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) = 3.76e-09
S(50-100 keV) = 1.58e-09
T90 vs. Hardness ratio plot
T90 = 0.0479999780654907 sec.
Hardness ratio (energy fluence ratio) = 0.420213
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 2.03656
Count Ratio (50-100 keV) / (15-25 keV) = 0.318792
Mask shadow pattern
IMX = 7.287951959060547E-02, IMY = 4.645271512426729E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.064000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.064000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.064000
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:
-51.999400 0.000000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9947 -15.6228 1.1 41.0 -30.2 1.8935 10.1 1.4 Sco X-1
255.9867 -37.8442 4.5 22.1 -60.8 0.3537 2.6 0.0 4U 1700-377
256.4385 -36.4253 45.2 22.0 -56.9 -0.0331 -0.3 0.2 GX 349+2
263.2151 -24.8139 0.0 22.1 -21.9 -0.1173 -1.0 12.0 GX 1+4
264.7289 -44.5194 4.6 16.0 -82.8 0.3061 2.5 4.2 4U 1735-44
268.1928 -1.4098 88.0 39.3 12.1 0.0231 0.1 10.8 SW J1753.5-0127
270.2860 -25.0621 6.9 17.4 -8.7 0.1787 1.7 1.0 GX 5-1
270.1520 -25.7957 4.8 16.9 -10.6 -0.2563 -2.4 8.7 GRS 1758-258
274.0541 -14.1544 5.4 25.4 14.4 0.2660 2.1 7.6 GX 17+2
275.9935 -30.1872 4.8 10.2 -5.7 0.2712 2.4 11.4 H1820-303
284.8845 -24.8390 5.9 13.1 40.8 -0.2175 -1.9 9.6 HT1900.1-2455
262.7600 -33.7662 0.0 17.8 -45.3 -0.0806 -0.7 12.1 GX 354-0
326.1496 -18.2003 2.9 41.5 111.3 1.9400 4.0 ------ UNKNOWN
356.3771 -45.4860 2.6 52.6 160.6 2.2616 4.4 ------ UNKNOWN
26.1148 -69.3094 2.8 58.9 -166.1 2.7443 4.2 ------ UNKNOWN
234.0177 -49.7619 2.8 37.3 -87.3 1.2867 4.2 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
0.000000 0.060000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.8890 -15.6450 4.4 41.1 -30.3 0.0211 2.6 5.2 Sco X-1
256.1537 -37.8006 48.3 22.0 -60.7 -0.0012 -0.2 8.3 4U 1700-377
256.2956 -36.5487 25.8 22.1 -57.3 0.0023 0.4 10.1 GX 349+2
263.0474 -24.8947 4.3 22.1 -22.3 -0.0119 -2.7 9.2 GX 1+4
264.9617 -44.4309 9.3 15.8 -82.7 0.0059 1.2 9.4 4U 1735-44
268.2936 -1.5515 5.7 39.2 12.2 -0.0124 -2.0 7.4 SW J1753.5-0127
270.0658 -25.0227 0.0 17.6 -9.1 0.0010 0.3 12.3 GX 5-1
270.3564 -25.5397 0.0 17.0 -9.5 -0.0034 -0.9 12.5 GRS 1758-258
274.1747 -14.0335 26.0 25.5 14.8 -0.0019 -0.4 9.8 GX 17+2
276.1538 -30.3994 56.6 10.0 -5.9 0.0008 0.2 12.0 H1820-303
285.2172 -24.8885 5.9 13.1 42.1 -0.0078 -1.9 10.0 HT1900.1-2455
262.9023 -34.0345 0.0 17.6 -46.0 -0.0056 -1.3 12.7 GX 354-0
331.3972 -23.2978 2.5 42.7 121.8 0.0509 4.6 ------ UNKNOWN
310.8519 -48.2972 2.3 21.9 164.6 0.0207 5.1 ------ UNKNOWN
250.1475 -8.6637 2.5 42.3 -17.4 0.0283 4.6 ------ UNKNOWN
251.7532 -45.8839 1.2 25.2 -81.1 0.0576 9.5 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
-239.200000 -203.260000
-119.200000 302.826800
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9861 -15.6317 0.9 41.0 -30.2 14.3708 13.5 0.6 Sco X-1
255.9002 -37.8072 5.2 22.2 -60.8 1.9397 2.2 4.7 4U 1700-377
256.3330 -36.3033 7.8 22.1 -56.7 1.2069 1.5 8.7 GX 349+2
262.9853 -24.7447 188.6 22.3 -22.1 0.0405 0.1 1.3 GX 1+4
264.6366 -44.6448 0.0 16.1 -83.2 1.2863 1.8 12.5 4U 1735-44
268.3359 -1.6108 307.3 39.1 12.2 0.0395 0.0 9.7 SW J1753.5-0127
270.2703 -25.1254 4.7 17.4 -8.9 1.5595 2.5 2.9 GX 5-1
270.1991 -25.8696 9.4 16.8 -10.6 -0.7903 -1.2 9.4 GRS 1758-258
273.9070 -14.1347 4.9 25.4 14.1 1.7364 2.4 8.2 GX 17+2
275.9962 -30.2763 4.4 10.2 -6.0 1.8516 2.7 6.6 H1820-303
285.0094 -25.1259 0.0 12.8 41.3 -0.3386 -0.5 12.4 HT1900.1-2455
262.9486 -33.9632 7.8 17.6 -45.7 1.0505 1.5 8.0 GX 354-0
275.7277 13.5269 2.3 52.0 27.4 8.8264 5.1 ------ UNKNOWN
261.1376 3.8407 2.2 46.9 5.5 5.6574 5.1 ------ UNKNOWN
26.1729 -69.3249 2.7 58.9 -166.0 17.8179 4.4 ------ UNKNOWN
237.6027 -0.4271 2.2 56.8 -22.4 14.6801 5.2 ------ UNKNOWN
235.0275 -21.6566 2.8 45.0 -45.5 6.2670 4.2 ------ UNKNOWN
Plot creation:
Sun Jul 27 16:08:28 EDT 2025