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
248.7673 +26.6004 0.0141 15.3 63.1 4.2449 13.6 TRIG_01516528
------------------------------------------
Foreground time interval of the image:
-9.280 33.381 (delta_t = 42.661 [sec])
Background time interval of the image:
-119.920 -9.280 (delta_t = 110.640 [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 -9.280 sec. to 76.448 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.43470 ( -0.165699 0.1712 )
Norm@50keV : 3.70930E-03 ( -0.000376917 0.000369627 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.40 using 59 PHA bins.
# Reduced chi-squared = 0.8667 for 57 degrees of freedom
# Null hypothesis probability = 7.525997e-01
Photon flux (15-150 keV) in 85.73 sec: 0.455411 ( -0.0400195 0.0400385 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.05174e-06 ( -3.59911e-07 3.69232e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -9.280 sec. to 76.448 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.43942 ( -0.171625 0.167704 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 3.70732E-03 ( -0.00200828 0.00362152 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.41 using 59 PHA bins.
# Reduced chi-squared = 0.8823 for 56 degrees of freedom
# Null hypothesis probability = 7.207724e-01
Photon flux (15-150 keV) in 85.73 sec: 0.455211 ( -0.039895 0.039763 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.0311e-06 ( -3.86368e-07 3.89746e-07 ) ergs/cm2
Band function
Time interval is from -9.280 sec. to 76.448 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.99566 ( -3.99562 -3.99562 )
beta : -1.48089 ( -0.240061 0.181571 )
Epeak [keV] : 22.7985 ( -22.7966 85.4881 )
Norm@50keV : 107.670 ( -107.697 341576 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.90 using 59 PHA bins.
# Reduced chi-squared = 0.8890 for 55 degrees of freedom
# Null hypothesis probability = 7.056568e-01
Photon flux (15-150 keV) in 85.73 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] : 12.9812 (-1.79 2.12311)
R^2/D10^2 : 8.27708E-02 (-0.0325178 0.0537423)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 84.95 using 59 PHA bins.
# Reduced chi-squared = 1.490 for 57 degrees of freedom
# Null hypothesis probability = 9.592452e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.536e-07 4.505e-08
25- 50 8.721e-07 1.055e-07
50-150 9.283e-07 2.241e-07
15-150 2.054e-06 2.799e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-55.9143 -200)
Norm : 1.83220 (-0.160855 0.160855)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.919e-07 1.286e-07
25- 50 7.538e-07 4.044e-07
50-150 1.653e-06 8.743e-07
15-150 2.799e-06 1.483e-06
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.60892 (-1.4626 1.72005)
R1^2/D10^2 : 0.597236 (-0.316053 0.470959)
kT2 [keV] : 29.7008 (-7.85193 18.9837)
R2^2/D10^2 : 4.22100E-03 (-0.00321591 0.00449355)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.874e-07 1.367e-07
25- 50 7.206e-07 2.591e-07
50-150 1.986e-06 1.079e-06
15-150 3.094e-06 1.259e-06
Peak spectrum fit
Power-law model
Time interval is from 0.260 sec. to 1.260 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.831760 ( -0.185612 0.182122 )
Norm@50keV : 3.12026E-02 ( -0.00337388 0.00336745 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.26 using 59 PHA bins.
# Reduced chi-squared = 0.8115 for 57 degrees of freedom
# Null hypothesis probability = 8.447117e-01
Photon flux (15-150 keV) in 1 sec: 3.58294 ( -0.385749 0.385799 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.59851e-07 ( -4.49562e-08 4.54281e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.260 sec. to 1.260 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.249804 ( -0.904125 0.709725 )
Epeak [keV] : 167.237 ( )
Norm@50keV : 5.79713E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.55 using 59 PHA bins.
# Reduced chi-squared = 0.7956 for 56 degrees of freedom
# Null hypothesis probability = 8.646830e-01
Photon flux (15-150 keV) in 1 sec: 3.51837 ( -0.39832 0.39619 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.47437e-07 ( -5.0121e-08 4.915e-08 ) ergs/cm2
Band function
Time interval is from 0.260 sec. to 1.260 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.967864 ( 0.967696 0.967696 )
beta : -0.831760 ( -0.182143 0.18571 )
Epeak [keV] : 15.3470 ( -15.3465 -15.3465 )
Norm@50keV : 4.34170E-02 ( -0.0155773 789625 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.26 using 59 PHA bins.
# Reduced chi-squared = 0.8410 for 55 degrees of freedom
# Null hypothesis probability = 7.933312e-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] : 22.2188 (-3.08717 3.81126)
R^2/D10^2 : 0.130681 (-0.0489854 0.0740071)
(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 1.189e-08 2.655e-09
25- 50 6.321e-08 9.420e-09
50-150 2.332e-07 4.265e-08
15-150 3.083e-07 4.860e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-21.5482 -200)
Norm : 12.9981 (-1.51595 1.51595)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.234e-08 1.790e-08
25- 50 6.222e-08 3.428e-08
50-150 1.365e-07 7.600e-08
15-150 2.310e-07 1.285e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 12.3050 (-5.62794 6.45)
R1^2/D10^2 : 0.452954 (-0.271651 1.36502)
kT2 [keV] : 46.9207 (-27.4173 -49.7786)
R2^2/D10^2 : 1.08268E-02 (-0.00819763 0.0628861)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.726e-08 9.645e-09
25- 50 6.654e-08 3.687e-08
50-150 2.665e-07 1.363e-07
15-150 3.503e-07 1.741e-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: 1.29625 ( -0.166192 0.169397 )
Norm@50keV : 5.38773E-03 ( -0.000511017 0.000504383 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.57 using 59 PHA bins.
# Reduced chi-squared = 1.010 for 57 degrees of freedom
# Null hypothesis probability = 4.538012e-01
Photon flux (15-150 keV) in 42.66 sec: 0.642328 ( -0.0564474 0.0564515 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.27333e-06 ( -2.59767e-07 2.6471e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.29452 ( -0.194321 0.16905 )
Epeak [keV] : 9999.23 ( -9999.35 -9999.35 )
Norm@50keV : 5.40770E-03 ( -0.005408 0.00225383 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.60 using 59 PHA bins.
# Reduced chi-squared = 1.029 for 56 degrees of freedom
# Null hypothesis probability = 4.157973e-01
Photon flux (15-150 keV) in 42.66 sec: 0.641907 ( -0.056379 0.056414 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.25463e-06 ( -1.21705e-07 2.7607e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.642946 ( 0.935783 5.70506 )
beta : -1.31618 ( -0.240662 0.176422 )
Epeak [keV] : 52.4944 ( -52.0035 -52.0035 )
Norm@50keV : 1.64345E-02 ( -0.0168935 399749 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.48 using 59 PHA bins.
# Reduced chi-squared = 1.045 for 55 degrees of freedom
# Null hypothesis probability = 3.833069e-01
Photon flux (15-150 keV) in 42.66 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) = 7.30e-07
S(50-100 keV) = 1.08e-06
T90 vs. Hardness ratio plot
T90 = 71.5040000677109 sec.
Hardness ratio (energy fluence ratio) = 1.47945
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.26887
Count Ratio (50-100 keV) / (15-25 keV) = 0.955082
Mask shadow pattern
IMX = 1.237456974964544E-01, IMY = -2.436557892518454E-01
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:
-119.920000 -9.280000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9610 -15.7183 2.2 31.5 -168.6 6.9510 5.3 4.8 Sco X-1
254.5740 35.5113 0.0 25.3 56.9 0.8024 0.5 11.6 Her X-1
256.0460 -37.8882 5.7 55.5 -173.0 -7.8052 -2.0 3.9 4U 1700-377
256.3624 -36.4960 7.8 54.3 -173.9 5.3448 1.5 5.6 GX 349+2
262.8802 -24.7164 7.3 46.5 172.5 4.0602 1.6 7.2 GX 1+4
268.4183 -1.5803 8.0 34.3 140.5 -2.7007 -1.4 8.2 SW J1753.5-0127
270.3109 -25.1236 4.3 51.0 165.7 9.9914 2.7 3.0 GX 5-1
270.2733 -25.7698 5.0 51.4 166.3 -8.8888 -2.3 2.3 GRS 1758-258
273.8772 -14.0058 12.9 45.8 151.8 2.9428 0.9 7.7 GX 17+2
263.0930 -33.8106 8.5 54.3 178.5 6.0871 1.4 5.4 GX 354-0
278.5432 -16.5257 2.6 50.9 150.8 19.9007 4.4 ------ UNKNOWN
227.3638 38.4616 2.2 25.3 4.2 6.0488 5.3 ------ UNKNOWN
230.1481 -24.1661 2.7 39.9 -144.5 7.6281 4.3 ------ UNKNOWN
212.8072 -23.5031 3.0 45.8 -122.7 19.6800 3.9 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-9.280000 33.380590
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9269 -15.7713 4.9 31.5 -168.5 0.8352 2.3 8.4 Sco X-1
254.6158 35.2318 5.9 25.1 57.4 -0.7569 -2.0 10.2 Her X-1
256.0745 -37.8205 64.9 55.5 -173.1 0.1871 0.2 4.4 4U 1700-377
256.5590 -36.4151 4.8 54.3 -174.2 -2.3222 -2.4 6.0 GX 349+2
262.9671 -24.9217 4.9 46.7 172.5 1.5697 2.4 10.8 GX 1+4
268.3684 -1.4502 284.7 34.2 140.3 0.0194 0.0 0.1 SW J1753.5-0127
270.3690 -25.0782 4.8 51.0 165.6 2.4424 2.4 4.6 GX 5-1
270.2306 -25.8513 5.2 51.5 166.4 -2.3651 -2.2 7.6 GRS 1758-258
273.9835 -14.1391 11.8 45.9 151.8 0.8310 1.0 6.3 GX 17+2
262.8585 -33.8164 72.5 54.2 178.7 -0.1693 -0.2 6.6 GX 354-0
248.7673 26.6004 0.8 15.3 63.1 4.2455 13.6 ------ UNKNOWN
255.7927 -27.5486 2.5 45.9 -177.9 2.6129 4.6 ------ UNKNOWN
241.3287 -34.4687 2.7 49.6 -159.4 2.8930 4.3 ------ UNKNOWN
191.2227 24.4671 2.7 44.9 -46.1 3.0080 4.2 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
82.380590 218.818600
221.080000 472.054400
474.080000 476.508900
481.080000 485.417800
519.080000 520.949300
523.080000 530.021100
533.080000 556.380000
557.080000 573.258500
574.080000 574.211300
575.080000 576.648900
581.080000 582.650000
586.080000 587.377000
603.080000 619.208200
620.080000 621.710000
623.080000 624.911900
626.080000 662.151700
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.8745 -15.6460 4.0 42.4 -148.7 17.2769 2.9 6.1 Sco X-1
254.6553 35.3449 6.2 10.1 54.4 -6.4116 -1.8 9.7 Her X-1
262.8996 -24.7598 7.3 53.2 -170.3 15.2949 1.6 6.0 GX 1+4
268.2857 -1.5986 15.5 33.9 169.0 -3.5436 -0.7 10.1 SW J1753.5-0127
270.3677 -25.0456 62.9 55.7 -178.1 2.3273 0.2 5.0 GX 5-1
270.3073 -25.7487 23.1 56.3 -177.7 6.9772 0.5 0.4 GRS 1758-258
274.0002 -14.0384 3.5 47.5 171.6 28.9307 3.3 0.4 GX 17+2
288.7632 11.0235 10.0 40.7 130.5 13.0547 1.2 5.1 GRS 1915+105
269.5580 -20.6914 3.0 51.4 -179.4 36.6911 3.9 ------ UNKNOWN
Plot creation:
Sun Oct 11 19:32:08 EDT 2026