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
255.3223 +1.5840 0.0197 14.8 143.6 0.8637 9.8 TRIG_01515414
------------------------------------------
Foreground time interval of the image:
1.784 48.685 (delta_t = 46.901 [sec])
Background time interval of the image:
-179.216 1.784 (delta_t = 181.000 [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 1.784 sec. to 106.784 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.37179 ( -0.2717 0.268567 )
Norm@50keV : 7.70419E-04 ( -0.000112698 0.000112558 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.18 using 59 PHA bins.
# Reduced chi-squared = 0.8629 for 57 degrees of freedom
# Null hypothesis probability = 7.596941e-01
Photon flux (15-150 keV) in 105 sec: 9.32396E-02 ( -0.0141755 0.0142464 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.86299e-07 ( -1.26185e-07 1.27832e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.784 sec. to 106.784 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.30243 ( -1.12296 1.6756 )
Epeak [keV] : 524.134 ( -524.145 -524.145 )
Norm@50keV : 8.32804E-04 ( -0.000169008 0.00200304 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.17 using 59 PHA bins.
# Reduced chi-squared = 0.8780 for 56 degrees of freedom
# Null hypothesis probability = 7.291114e-01
Photon flux (15-150 keV) in 105 sec: 9.28821E-02 ( -0.0149725 0.0145199 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.82422e-07 ( -1.41076e-07 1.30774e-07 ) ergs/cm2
Band function
Time interval is from 1.784 sec. to 106.784 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.665915 ( 0.871339 0.871339 )
beta : -1.46571 ( 1.44543 0.335936 )
Epeak [keV] : 70.9229 ( -70.2676 447.027 )
Norm@50keV : 2.01550E-03 ( -0.00205828 70731.9 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.98 using 59 PHA bins.
# Reduced chi-squared = 0.8906 for 55 degrees of freedom
# Null hypothesis probability = 7.026155e-01
Photon flux (15-150 keV) in 105 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] : 16.5108 (-3.23421 4.33285)
R^2/D10^2 : 7.56006E-03 (-0.00410414 0.00856928)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.58 using 59 PHA bins.
# Reduced chi-squared = 1.063 for 57 degrees of freedom
# Null hypothesis probability = 3.479854e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.441e-08 1.431e-08
25- 50 1.919e-07 4.735e-08
50-150 3.699e-07 1.117e-07
15-150 6.062e-07 1.373e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-69.3573 -200)
Norm : 0.386625 (-0.056638 0.056638)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.011e-07 5.728e-08
25- 50 1.945e-07 1.099e-07
50-150 4.265e-07 2.397e-07
15-150 7.221e-07 4.010e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.50608 (-3.06892 3.74322)
R1^2/D10^2 : 5.14340E-02 (-0.0350386 0.174272)
kT2 [keV] : 36.9750 (-31.5376 -36.975)
R2^2/D10^2 : 4.16856E-04 (-0.000374173 0.00204649)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.184e-08 4.732e-08
25- 50 1.974e-07 1.063e-07
50-150 5.154e-07 2.876e-07
15-150 7.946e-07 4.027e-07
Peak spectrum fit
Power-law model
Time interval is from 3.784 sec. to 4.784 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.686177 ( -0.389472 0.348147 )
Norm@50keV : 6.31103E-03 ( -0.0014397 0.00136482 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.65 using 59 PHA bins.
# Reduced chi-squared = 0.9413 for 57 degrees of freedom
# Null hypothesis probability = 6.014637e-01
Photon flux (15-150 keV) in 1 sec: 0.730326 ( -0.148171 0.150913 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.75183e-08 ( -1.43135e-08 1.43396e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 3.784 sec. to 4.784 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.412326 ( -2.28152 0.593261 )
Epeak [keV] : 407.267 ( -407.06 -407.06 )
Norm@50keV : 7.85638E-03 ( -0.00244793 0.0298006 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.56 using 59 PHA bins.
# Reduced chi-squared = 0.9565 for 56 degrees of freedom
# Null hypothesis probability = 5.675928e-01
Photon flux (15-150 keV) in 1 sec: 0.719682 ( -0.159984 0.158661 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.734e-08 ( -1.45092e-08 1.44279e-08 ) ergs/cm2
Band function
Time interval is from 3.784 sec. to 4.784 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.836957 ( 0.836957 0.836957 )
beta : -0.686178 ( -0.348155 0.389078 )
Epeak [keV] : 14.9580 ( -14.958 -14.958 )
Norm@50keV : 9.24634E-03 ( -0.00431907 131051 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.65 using 59 PHA bins.
# Reduced chi-squared = 0.9755 for 55 degrees of freedom
# Null hypothesis probability = 5.262529e-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] : 31.7071 (-7.01252 11.9102)
R^2/D10^2 : 9.62935E-03 (-0.00562705 0.0105893)
(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 1.463e-09 5.723e-10
25- 50 9.225e-09 3.785e-09
50-150 6.398e-08 2.468e-08
15-150 7.467e-08 2.893e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-41.3388 -200)
Norm : 3.09951 (-0.633738 0.633738)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.726e-09 4.541e-09
25- 50 1.486e-08 8.620e-09
50-150 3.260e-08 1.869e-08
15-150 5.519e-08 3.244e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.16210 (-4.13438 14.1447)
R1^2/D10^2 : 3.33990 (-3.33066 64022.3)
kT2 [keV] : 34.9628 (-8.65005 36.7698)
R2^2/D10^2 : 7.08565E-03 (-0.00632238 0.00548335)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.898e-09 2.787e-09
25- 50 9.504e-09 4.411e-09
50-150 6.424e-08 3.401e-08
15-150 7.865e-08 3.698e-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: 1.32876 ( -0.259142 0.254628 )
Norm@50keV : 1.16428E-03 ( -0.00016917 0.000169079 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.38 using 59 PHA bins.
# Reduced chi-squared = 0.9364 for 57 degrees of freedom
# Null hypothesis probability = 6.118437e-01
Photon flux (15-150 keV) in 46.9 sec: 0.139663 ( -0.0211307 0.0212478 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.35908e-07 ( -8.46053e-08 8.56225e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.566181 ( -1.45153 0.933938 )
Epeak [keV] : 97.0501 ( -35.2608 -97.0453 )
Norm@50keV : 2.73629E-03 ( -0.00168677 0.010649 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.02 using 59 PHA bins.
# Reduced chi-squared = 0.9289 for 56 degrees of freedom
# Null hypothesis probability = 6.262134e-01
Photon flux (15-150 keV) in 46.9 sec: 0.134244 ( -0.022697 0.022661 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.04911e-07 ( -9.71707e-08 9.73363e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.219916 ( 0.202111 4.9647 )
beta : -1.80730 ( 1.80439 0.630339 )
Epeak [keV] : 75.9833 ( -74.4182 261.908 )
Norm@50keV : 4.30544E-03 ( -0.00461682 8.51024 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.62 using 59 PHA bins.
# Reduced chi-squared = 0.9385 for 55 degrees of freedom
# Null hypothesis probability = 6.045724e-01
Photon flux (15-150 keV) in 46.9 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 5.13034e-07 ( 0 0 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 1.82e-07
S(50-100 keV) = 2.81e-07
T90 vs. Hardness ratio plot
T90 = 94 sec.
Hardness ratio (energy fluence ratio) = 1.54396
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.66164
Count Ratio (50-100 keV) / (15-25 keV) = 1.05685
Mask shadow pattern
IMX = -2.132805562602184E-01, IMY = -1.571847199922020E-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:
-179.216000 1.784000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9825 -15.6391 0.4 24.6 -160.9 9.7830 31.9 0.2 Sco X-1
254.2550 35.3646 7.1 28.7 45.9 0.7573 1.6 10.0 Her X-1
255.9788 -37.8395 12.8 48.3 -169.2 0.6967 0.9 0.5 4U 1700-377
256.4546 -36.4178 72.6 47.1 -170.3 -0.1096 -0.2 1.0 GX 349+2
262.9370 -24.8746 21.2 39.2 174.9 -0.2926 -0.5 8.7 GX 1+4
264.8084 -44.4647 22.5 57.0 -173.7 0.7584 0.5 2.9 4U 1735-44
268.4184 -1.5861 5.1 28.0 135.8 -0.9976 -2.2 8.6 SW J1753.5-0127
270.2092 -25.0983 4.2 43.4 167.2 2.2108 2.8 4.2 GX 5-1
270.3604 -25.5950 3.9 43.9 167.6 2.4686 2.9 9.4 GRS 1758-258
273.9348 -14.2107 6.6 38.9 151.2 1.2467 1.7 11.2 GX 17+2
275.9341 -30.3750 20.2 50.8 167.2 0.6898 0.6 0.7 H1820-303
263.0792 -33.8153 12.5 47.0 -178.5 0.7771 0.9 4.6 GX 354-0
267.3161 50.8253 2.9 46.8 46.8 4.3252 3.9 ------ UNKNOWN
270.1727 26.9879 2.8 32.0 77.1 2.8012 4.1 ------ UNKNOWN
254.4682 26.0945 3.2 20.8 57.5 1.3865 3.6 ------ UNKNOWN
250.5729 -48.0327 2.6 57.3 -161.3 6.8053 4.5 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
1.784000 48.684610
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.7774 -15.5637 0.0 24.5 -160.5 -0.1211 -1.3 12.5 Sco X-1
254.4094 35.2565 9.4 28.7 46.2 0.1502 1.2 5.7 Her X-1
256.0312 -37.8329 10.7 48.4 -169.2 0.1973 1.1 2.2 4U 1700-377
256.5491 -36.3734 643.5 47.1 -170.4 -0.0031 -0.0 6.2 GX 349+2
262.9018 -24.6285 6.0 39.0 174.7 0.2811 1.9 9.1 GX 1+4
264.8271 -44.3921 12.2 56.9 -173.8 0.4295 0.9 5.0 4U 1735-44
268.3524 -1.3014 4.8 27.9 135.3 -0.3078 -2.4 9.1 SW J1753.5-0127
270.3426 -24.9289 6.3 43.4 166.9 0.3351 1.8 9.6 GX 5-1
270.2709 -25.7497 11.0 44.0 167.8 0.1948 1.1 1.8 GRS 1758-258
274.1697 -14.1044 0.0 39.0 150.9 -0.3737 -2.1 10.4 GX 17+2
275.9213 -30.4627 10.1 50.8 167.3 -0.3780 -1.1 5.7 H1820-303
263.1431 -33.8489 11.9 47.0 -178.5 -0.1904 -1.0 7.7 GX 354-0
255.3223 1.5840 1.2 14.8 143.6 0.8636 9.8 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
105.884590 662.914000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9885 -15.6383 0.5 20.0 -143.2 5.0260 23.7 0.5 Sco X-1
254.4536 35.3379 33.8 33.7 5.3 0.0937 0.3 0.3 Her X-1
255.8869 -37.9628 10.7 39.6 -174.1 -0.3639 -1.1 8.5 4U 1700-377
256.3453 -36.3348 24.3 37.9 -174.8 0.1587 0.5 6.9 GX 349+2
263.1621 -24.7813 5.1 27.5 171.0 0.5801 2.3 8.6 GX 1+4
264.6114 -44.5139 6.2 46.9 177.5 1.0146 1.9 6.8 4U 1735-44
268.4645 -1.5881 5.1 13.5 110.1 0.5023 2.3 10.0 SW J1753.5-0127
270.2419 -25.0808 6.7 30.3 159.1 0.5103 1.7 2.3 GX 5-1
270.4650 -25.8617 0.0 31.1 159.5 -0.2721 -0.9 11.3 GRS 1758-258
273.8591 -14.0500 3.9 24.1 137.6 0.7587 2.9 8.6 GX 17+2
275.8486 -30.4080 8.4 37.5 156.8 0.5260 1.4 4.7 H1820-303
285.1878 -24.9855 14.4 39.3 141.1 -0.5019 -0.8 9.1 HT1900.1-2455
288.7087 10.9118 72.2 34.4 79.4 0.0817 0.2 5.7 GRS 1915+105
263.1377 -33.8424 97.6 36.2 175.5 0.0336 0.1 7.4 GX 354-0
241.9849 55.1444 3.1 54.6 -2.8 2.2916 3.7 ------ UNKNOWN
213.1070 14.4197 3.7 43.6 -64.1 2.8173 3.1 ------ UNKNOWN
Plot creation:
Wed Oct 7 00:25:46 EDT 2026