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
248.2103 +61.6111 0.0198 50.6 -143.8 11.3505 9.6 TRIG_01299088
------------------------------------------
Foreground time interval of the image:
1.672 109.928 (delta_t = 108.256 [sec])
Background time interval of the image:
-17.499 1.672 (delta_t = 19.171 [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 88.000000
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 88.000000
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 88.000000
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 1.672 sec. to 109.928 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.28852 ( -0.123997 0.122012 )
Norm@50keV : 7.12160E-03 ( -0.000483912 0.000481461 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.19 using 59 PHA bins.
# Reduced chi-squared = 1.056 for 57 degrees of freedom
# Null hypothesis probability = 3.611312e-01
Photon flux (15-150 keV) in 108.3 sec: 0.847854 ( -0.0645636 0.0651056 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.64312e-06 ( -5.09286e-07 5.0997e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.672 sec. to 109.928 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.28423 ( -0.325927 0.168438 )
Epeak [keV] : 1.00000E+04 ( -10000 -10000 )
Norm@50keV : 7.15177E-03 ( -0.000484599 0.000467937 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.21 using 59 PHA bins.
# Reduced chi-squared = 1.075 for 56 degrees of freedom
# Null hypothesis probability = 3.261678e-01
Photon flux (15-150 keV) in 108.3 sec: 0.847682 ( -0.06469 0.064026 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.64387e-06 ( -5.07548e-07 5.05414e-07 ) ergs/cm2
Band function
Time interval is from 1.672 sec. to 109.928 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.02703 ( 1.02703 1.02703 )
beta : -1.28851 ( -0.121946 0.124153 )
Epeak [keV] : 42.1316 ( -42.1316 2154.56 )
Norm@50keV : 1.36394E-02 ( -0.00529187 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.19 using 59 PHA bins.
# Reduced chi-squared = 1.094 for 55 degrees of freedom
# Null hypothesis probability = 2.935371e-01
Photon flux (15-150 keV) in 108.3 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] : 21.4322 ( )
R^2/D10^2 : 2.92658E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 119.73 using 59 PHA bins.
# Reduced chi-squared = 2.1005 for 57 degrees of freedom
# Null hypothesis probability = 2.354037e-06
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.726e-07 3.845e-08
25- 50 1.419e-06 1.635e-07
50-150 4.865e-06 4.684e-07
15-150 6.557e-06 5.188e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-13.9863 -200)
Norm : 3.67405 (-0.244343 0.244343)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.913e-07 8.095e-08
25- 50 1.907e-06 1.809e-07
50-150 4.182e-06 9.606e-07
15-150 7.080e-06 1.286e-06
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.44443 (-1.73993 2.0134)
R1^2/D10^2 : 0.433524 (-0.211729 0.505598)
kT2 [keV] : 37.4084 (-7.54961 15.1193)
R2^2/D10^2 : 3.96016E-03 (-0.00241392 0.00413799)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.096e-07 3.169e-07
25- 50 1.748e-06 5.667e-07
50-150 5.140e-06 2.408e-06
15-150 7.597e-06 2.628e-06
Peak spectrum fit
Power-law model
Time interval is from 24.492 sec. to 25.492 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.19259 ( -0.392449 0.496851 )
Norm@50keV : 1.27440E-02 ( -0.00473318 0.00464407 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.00 using 59 PHA bins.
# Reduced chi-squared = 1.123 for 57 degrees of freedom
# Null hypothesis probability = 2.444276e-01
Photon flux (15-150 keV) in 1 sec: 2.09948 ( -0.743465 0.7503 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.19756e-07 ( -4.1887e-08 4.20317e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 24.492 sec. to 25.492 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.18709 ( -3.91655 2.1156 )
Epeak [keV] : 61.6880 ( -17.0542 14.2579 )
Norm@50keV : 0.341297 ( -0.351461 5.48563 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.60 using 59 PHA bins.
# Reduced chi-squared = 0.9928 for 56 degrees of freedom
# Null hypothesis probability = 4.899876e-01
Photon flux (15-150 keV) in 1 sec: 1.99263 ( -0.71528 0.74205 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.50245e-07 ( -4.55e-08 4.587e-08 ) ergs/cm2
Band function
Time interval is from 24.492 sec. to 25.492 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.19990 ( -3.15109 -2.24843 )
beta : -10.0000 ( 10 1.77636e-14 )
Epeak [keV] : 61.9790 ( -17.5701 13.5336 )
Norm@50keV : 0.340657 ( -0.340691 5.12279 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.60 using 59 PHA bins.
# Reduced chi-squared = 1.011 for 55 degrees of freedom
# Null hypothesis probability = 4.519593e-01
Photon flux (15-150 keV) in 1 sec: 2.07968 ( 4.92032 -0.38901 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.50725e-07 ( -1.50718e-07 -4.5102e-08 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 16.2656 (-3.49195 3.39984)
R^2/D10^2 : 0.210310 (-0.11612 0.287585)
(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 1.146e-08 6.958e-09
25- 50 4.891e-08 2.468e-08
50-150 9.100e-08 5.680e-08
15-150 1.514e-07 7.688e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 68.4351 (-29.5668 53.2085)
Norm : 11.4710 (-4.29465 5.24011)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.936e-08 1.140e-08
25- 50 4.642e-08 2.028e-08
50-150 5.862e-08 4.369e-08
15-150 1.344e-07 6.286e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.79154 (-4.6902 24.936)
R1^2/D10^2 : 5.33486 (-5.46892 51.2842)
kT2 [keV] : 17.1989 (-3.77189 4.52057)
R2^2/D10^2 : 0.156117 (-0.156938 0.26762)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.028e-08 1.147e-08
25- 50 4.827e-08 2.817e-08
50-150 8.895e-08 5.715e-08
15-150 1.575e-07 9.015e-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: 1.28852 ( -0.123997 0.122012 )
Norm@50keV : 7.12160E-03 ( -0.000483912 0.000481461 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.19 using 59 PHA bins.
# Reduced chi-squared = 1.056 for 57 degrees of freedom
# Null hypothesis probability = 3.611312e-01
Photon flux (15-150 keV) in 108.3 sec: 0.847854 ( -0.0645636 0.0651056 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.64312e-06 ( -5.09286e-07 5.0997e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.28423 ( -0.325927 0.168438 )
Epeak [keV] : 1.00000E+04 ( -10000 -10000 )
Norm@50keV : 7.15177E-03 ( -0.000484599 0.000467937 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.21 using 59 PHA bins.
# Reduced chi-squared = 1.075 for 56 degrees of freedom
# Null hypothesis probability = 3.261678e-01
Photon flux (15-150 keV) in 108.3 sec: 0.847682 ( -0.06469 0.064026 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.64387e-06 ( -5.07548e-07 5.05414e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.02703 ( 1.02703 1.02703 )
beta : -1.28851 ( -0.121946 0.124153 )
Epeak [keV] : 42.1316 ( -42.1316 2655.32 )
Norm@50keV : 1.36394E-02 ( -0.00529187 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.19 using 59 PHA bins.
# Reduced chi-squared = 1.094 for 55 degrees of freedom
# Null hypothesis probability = 2.935371e-01
Photon flux (15-150 keV) in 108.3 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) = 1.69e-06
S(50-100 keV) = 2.77e-06
T90 vs. Hardness ratio plot
T90 = 91.0080000162125 sec.
Hardness ratio (energy fluence ratio) = 1.63905
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.73938
Count Ratio (50-100 keV) / (15-25 keV) = 1.65551
Mask shadow pattern
IMX = -9.837567573317278E-01, IMY = 7.207048505493830E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 88.000000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 88.000000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 88.000000
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:
-17.499400 1.672000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9705 -15.6425 0.4 29.8 5.5 2.1641 29.2 0.5 Sco X-1
254.5663 35.5065 4.1 30.0 -117.4 0.2696 2.8 11.2 Her X-1
255.8079 -37.7729 5.6 53.9 6.0 0.5059 2.1 9.5 4U 1700-377
256.3501 -36.2898 5.4 52.8 4.7 -0.4212 -2.1 9.0 GX 349+2
263.0095 -24.7457 126.9 46.5 -10.1 0.0098 0.1 0.0 GX 1+4
268.4448 -1.2492 0.0 36.8 -43.7 0.0914 0.9 13.0 SW J1753.5-0127
270.2612 -25.2808 0.0 51.5 -15.8 -0.1705 -1.1 12.2 GX 5-1
270.2350 -25.8481 5.8 51.9 -15.3 -0.3201 -2.0 7.3 GRS 1758-258
274.0516 -13.9797 8.2 47.6 -30.6 -0.2105 -1.4 4.3 GX 17+2
275.9896 -30.2938 5.0 58.6 -15.3 -0.8391 -2.3 5.5 H1820-303
263.0211 -33.7077 30.4 53.5 -2.8 -0.0751 -0.4 7.8 GX 354-0
209.8825 -8.5172 2.4 31.5 77.8 0.5835 4.8 ------ UNKNOWN
205.9859 44.8127 2.9 40.5 176.8 0.3988 4.0 ------ UNKNOWN
247.4049 57.7290 2.5 46.8 -142.7 0.7346 4.6 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
1.672000 109.928000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
245.0184 -15.6786 2.2 29.8 5.5 -2.0358 -5.3 3.2 Sco X-1
254.5115 35.4511 4.2 29.9 -117.4 -1.3640 -2.8 7.0 Her X-1
256.0215 -37.7402 22.2 53.9 5.8 -0.6782 -0.5 6.4 4U 1700-377
256.3157 -36.4374 25.4 52.9 4.8 -0.5212 -0.5 5.8 GX 349+2
263.1233 -24.7186 10.2 46.5 -10.2 0.6537 1.1 6.4 GX 1+4
268.2678 -1.5820 5.0 36.8 -43.1 1.2114 2.3 9.8 SW J1753.5-0127
270.3523 -25.1143 11.7 51.4 -16.1 -0.7893 -1.0 4.3 GX 5-1
270.2699 -25.8548 5.6 51.9 -15.3 1.7541 2.0 6.9 GRS 1758-258
274.0066 -14.0712 4.7 47.6 -30.4 1.9194 2.5 2.1 GX 17+2
276.0018 -30.3050 5.5 58.6 -15.3 4.3015 2.1 5.4 H1820-303
262.9999 -33.9897 149.5 53.7 -2.6 -0.0913 -0.1 9.3 GX 354-0
242.5691 36.3310 2.3 25.5 -136.1 1.7856 4.9 ------ UNKNOWN
277.5586 -16.3468 2.5 51.7 -30.2 4.8055 4.6 ------ UNKNOWN
263.5398 34.4950 3.0 35.1 -107.3 2.5935 3.9 ------ UNKNOWN
248.2080 61.6096 1.2 50.6 -143.8 11.5834 9.8 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
755.900620 843.071500
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
255.9573 -37.7093 8.0 31.3 105.6 5.2561 1.4 8.2 4U 1700-377
256.4559 -36.5565 99.7 31.5 107.9 0.4075 0.1 8.1 GX 349+2
262.8764 -24.6135 0.0 34.2 131.8 -5.6391 -1.6 10.7 GX 1+4
264.5774 -44.4232 5.2 22.9 96.6 6.4041 2.2 7.3 4U 1735-44
268.2924 -1.3984 6.9 50.4 158.2 -13.1219 -1.7 5.6 SW J1753.5-0127
270.1320 -25.0564 12.9 29.4 140.4 2.5083 0.9 8.4 GX 5-1
270.3082 -25.8856 11.3 28.7 139.5 -2.7348 -1.0 8.6 GRS 1758-258
273.9776 -13.9165 6.4 36.7 157.3 6.0982 1.8 7.4 GX 17+2
275.9869 -30.2911 8.4 22.1 141.4 -3.2635 -1.4 5.6 H1820-303
284.9097 -25.0942 0.0 22.2 166.6 2.6796 1.2 12.5 HT1900.1-2455
288.8798 10.8297 23.4 56.3 -172.8 4.8855 0.5 8.4 GRS 1915+105
263.1647 -33.8477 5.1 28.2 118.3 -6.2255 -2.3 8.8 GX 354-0
244.0341 -41.0974 2.7 38.2 93.3 27.6217 4.3 ------ UNKNOWN
251.4439 -36.4207 3.8 35.1 104.6 13.7474 3.1 ------ UNKNOWN
100.0631 -81.6340 2.8 53.0 13.7 34.4462 4.1 ------ UNKNOWN
272.3381 -37.2859 3.4 20.0 120.8 8.2534 3.4 ------ UNKNOWN
92.4923 -83.5619 3.2 50.9 13.3 21.3567 3.6 ------ UNKNOWN
16.5428 -62.4288 3.6 46.7 -22.0 13.2192 3.2 ------ UNKNOWN
Plot creation:
Mon Mar 31 10:03:03 EDT 2025