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
280.3401 -4.9390 0.0028 14.5 -178.6 1.7267 70.2 TRIG_01249878
------------------------------------------
Foreground time interval of the image:
-0.048 0.288 (delta_t = 0.336 [sec])
Background time interval of the image:
-239.400 -0.048 (delta_t = 239.352 [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 0.128000
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 0.128000
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 0.128000
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 -0.048 sec. to 0.288 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.73390 ( )
Norm@50keV : 0.212722 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 207.25 using 59 PHA bins.
# Reduced chi-squared = 3.6360 for 57 degrees of freedom
# Null hypothesis probability = 6.225100e-19
Photon flux (15-150 keV) in 0.336 sec: 48.5620 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 7.69591e-07 ( 0 0 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.048 sec. to 0.288 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.959527 ( -0.312179 0.29193 )
Epeak [keV] : 26.7707 ( -3.83931 2.98757 )
Norm@50keV : 1.86712 ( -0.559177 0.874112 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.52 using 59 PHA bins.
# Reduced chi-squared = 1.027 for 56 degrees of freedom
# Null hypothesis probability = 4.188473e-01
Photon flux (15-150 keV) in 0.336 sec: 42.7860 ( -1.7925 1.8092 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.07596e-07 ( 0 0 ) ergs/cm2
Band function
Time interval is from -0.048 sec. to 0.288 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.966164 ( -0.282744 0.11159 )
beta : -9.37167 ( 9.37167 19.3713 )
Epeak [keV] : 26.7131 ( -3.74637 2.85624 )
Norm@50keV : 1.85037 ( -0.540343 1.29168 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.52 using 59 PHA bins.
# Reduced chi-squared = 1.046 for 55 degrees of freedom
# Null hypothesis probability = 3.821359e-01
Photon flux (15-150 keV) in 0.336 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] : 9.34811 ( )
R^2/D10^2 : 24.6371 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 180.48 using 59 PHA bins.
# Reduced chi-squared = 3.1663 for 57 degrees of freedom
# Null hypothesis probability = 9.524828e-15
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.435e-07 7.123e-09
25- 50 3.232e-07 9.929e-09
50-150 1.383e-07 9.895e-09
15-150 6.050e-07 1.680e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 34.2679 (-1.69845 1.80358)
Norm : 329.629 (-19.5407 20.7966)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.398e-07 1.040e-08
25- 50 2.938e-07 8.921e-09
50-150 1.902e-07 1.137e-08
15-150 7.238e-07 2.100e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.88387 (-0.628645 0.720873)
R1^2/D10^2 : 220.410 (-91.4088 177.932)
kT2 [keV] : 12.2232 (-0.810823 1.07188)
R2^2/D10^2 : 5.68524 (-2.17009 2.6161)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.242e-07 3.066e-08
25- 50 2.952e-07 2.085e-08
50-150 1.804e-07 1.752e-08
15-150 6.999e-07 5.981e-08
Peak spectrum fit
Power-law model
Time interval is from -0.378 sec. to 0.622 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.61883 ( )
Norm@50keV : 7.74680E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 146.77 using 59 PHA bins.
# Reduced chi-squared = 2.5749 for 57 degrees of freedom
# Null hypothesis probability = 7.477290e-10
Photon flux (15-150 keV) in 1 sec: 16.3974 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 8.02115e-07 ( 0 0 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.378 sec. to 0.622 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.05364 ( -0.341475 0.318935 )
Epeak [keV] : 26.4592 ( -4.63159 3.38016 )
Norm@50keV : 0.552071 ( -0.180799 0.294817 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.99 using 59 PHA bins.
# Reduced chi-squared = 0.9998 for 56 degrees of freedom
# Null hypothesis probability = 4.753001e-01
Photon flux (15-150 keV) in 1 sec: 14.7299 ( -0.6353 0.6409 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.30564e-07 ( -2.6771e-08 2.6944e-08 ) ergs/cm2
Band function
Time interval is from -0.378 sec. to 0.622 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.05339 ( -0.0912699 0.0739985 )
beta : -10.00000 ( 10 1.86335e-06 )
Epeak [keV] : 26.4547 ( -1.31745 3.38303 )
Norm@50keV : 0.552248 ( -0.118341 0.295218 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.99 using 59 PHA bins.
# Reduced chi-squared = 1.018 for 55 degrees of freedom
# Null hypothesis probability = 4.375628e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 7.32132e-07 ( -7.32125e-07 -2.6539e-08 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.27898 ( )
R^2/D10^2 : 8.74342 ( )
(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 1.488e-07 8.850e-09
25- 50 3.315e-07 1.095e-08
50-150 1.387e-07 1.060e-08
15-150 6.190e-07 1.780e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 35.7560 (-2.04252 2.20236)
Norm : 108.847 (-6.91331 7.39433)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.399e-07 1.205e-08
25- 50 2.999e-07 9.700e-09
50-150 2.043e-07 1.510e-08
15-150 7.441e-07 2.355e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.92352 (-0.693716 0.813871)
R1^2/D10^2 : 72.9188 (-31.9556 65.423)
kT2 [keV] : 12.4012 (-0.959266 1.36864)
R2^2/D10^2 : 1.84498 (-0.819885 1.00655)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.268e-07 3.275e-08
25- 50 3.013e-07 2.845e-08
50-150 1.897e-07 2.015e-08
15-150 7.178e-07 6.975e-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: 2.73390 ( )
Norm@50keV : 0.212722 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 207.25 using 59 PHA bins.
# Reduced chi-squared = 3.6360 for 57 degrees of freedom
# Null hypothesis probability = 6.225100e-19
Photon flux (15-150 keV) in 0.336 sec: 48.5620 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 7.69591e-07 ( 0 0 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.959527 ( -0.312179 0.29193 )
Epeak [keV] : 26.7707 ( -3.83931 2.98757 )
Norm@50keV : 1.86712 ( -0.559177 0.874112 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.52 using 59 PHA bins.
# Reduced chi-squared = 1.027 for 56 degrees of freedom
# Null hypothesis probability = 4.188473e-01
Photon flux (15-150 keV) in 0.336 sec: 42.7860 ( -1.7925 1.8092 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.07596e-07 ( 0 0 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.966164 ( -0.282744 0.11159 )
beta : -9.37167 ( 9.37167 19.3713 )
Epeak [keV] : 26.7131 ( -3.74637 2.85624 )
Norm@50keV : 1.85037 ( -0.540343 1.29168 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.52 using 59 PHA bins.
# Reduced chi-squared = 1.046 for 55 degrees of freedom
# Null hypothesis probability = 3.821359e-01
Photon flux (15-150 keV) in 0.336 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) = 2.59e-07
S(50-100 keV) = 1.56e-07
T90 vs. Hardness ratio plot
T90 = 0.143999934196472 sec.
Hardness ratio (energy fluence ratio) = 0.602317
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.922977
Count Ratio (50-100 keV) / (15-25 keV) = 0.278136
Mask shadow pattern
IMX = -2.585815842452477E-01, IMY = 6.190485788638520E-03
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.128000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.128000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.128000
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:
-239.400000 -0.048000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9886 -15.6336 1.5 48.2 -148.1 8.4829 7.7 0.7 Sco X-1
254.4741 35.2786 5.2 41.1 -72.0 3.7201 2.2 3.9 Her X-1
256.0958 -37.7323 8.6 54.0 -178.4 2.0540 1.4 8.5 4U 1700-377
256.4212 -36.2849 19.7 52.8 -177.5 0.7598 0.6 8.3 GX 349+2
262.9818 -24.7478 82.7 40.3 -173.2 -0.0847 -0.1 1.5 GX 1+4
264.6300 -44.4089 4.3 56.0 170.6 4.7649 2.6 5.4 4U 1735-44
268.2509 -1.4130 4.0 21.4 -143.3 -1.1537 -2.9 7.4 SW J1753.5-0127
270.2960 -25.0518 5.3 36.8 177.7 1.3573 2.2 1.8 GX 5-1
270.2290 -25.6253 5.4 37.3 177.4 1.3300 2.1 8.1 GRS 1758-258
274.0573 -14.0081 2.0 25.5 -177.1 2.5598 5.7 3.4 GX 17+2
276.0934 -30.3654 8.1 39.5 166.6 1.0804 1.4 8.7 H1820-303
284.8156 -24.9856 0.0 32.7 155.7 -0.5374 -0.9 12.6 HT1900.1-2455
288.8564 10.7415 0.0 3.4 -8.9 -1.0220 -2.3 12.7 GRS 1915+105
299.6029 35.2164 0.7 29.7 -9.2 7.4357 16.4 1.1 Cyg X-1
308.1065 41.0441 6.3 38.1 -3.9 1.0151 1.8 5.5 Cyg X-3
326.3684 38.3561 50.9 46.5 13.4 0.1463 0.2 9.5 Cyg X-2
262.9238 -33.8115 8.4 47.6 179.0 1.4928 1.4 3.5 GX 354-0
334.8809 15.5434 2.5 46.8 46.6 5.2826 4.7 ------ UNKNOWN
318.3484 -2.1794 3.2 32.1 77.4 2.7503 3.6 ------ UNKNOWN
321.3995 38.0713 3.3 43.1 10.6 2.1694 3.5 ------ UNKNOWN
316.5218 33.4958 2.1 37.2 12.6 3.1305 5.5 ------ UNKNOWN
UNKNOWN
UNKNOWN
UNKNOWN
UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-0.048000 0.288000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.8867 -15.5490 7.4 48.3 -147.9 0.1070 1.6 7.7 Sco X-1
254.3703 35.3182 6.9 41.2 -72.0 0.1658 1.7 4.5 Her X-1
255.8581 -37.8325 6.4 54.2 -178.3 -0.1887 -1.8 6.1 4U 1700-377
256.4139 -36.2929 4.3 52.8 -177.5 -0.2178 -2.7 7.9 GX 349+2
262.9979 -24.7399 5.2 40.3 -173.2 -0.0848 -2.2 0.7 GX 1+4
264.8361 -44.5057 3.7 56.0 170.4 0.5543 3.1 5.2 4U 1735-44
268.3222 -1.5012 4.3 21.3 -143.6 -0.0755 -2.7 4.0 SW J1753.5-0127
270.4117 -25.0481 7.3 36.7 177.6 0.0569 1.6 7.2 GX 5-1
270.0994 -25.8070 0.0 37.5 177.4 0.0481 1.3 11.6 GRS 1758-258
273.8969 -13.9482 4.0 25.5 -176.7 0.0814 2.9 8.3 GX 17+2
276.0269 -30.4465 6.8 39.6 166.7 -0.0738 -1.7 7.1 H1820-303
285.1940 -24.9406 53.0 32.6 155.0 -0.0083 -0.2 8.7 HT1900.1-2455
288.9209 11.0500 17.3 3.7 -9.7 -0.0168 -0.7 9.6 GRS 1915+105
299.6237 35.0124 5.1 29.5 -9.0 0.0658 2.3 11.5 Cyg X-1
308.1106 41.1405 0.0 38.2 -4.0 0.0838 2.2 11.3 Cyg X-3
326.0306 38.3406 9.2 46.3 13.2 0.0716 1.3 6.7 Cyg X-2
262.9114 -33.7510 6.1 47.5 179.0 -0.1040 -1.9 6.3 GX 354-0
291.4254 -43.3792 2.1 51.1 147.4 0.7872 5.5 ------ UNKNOWN
280.3401 -4.9389 0.2 14.5 -178.6 1.7264 70.2 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
329.000600 407.200000
408.600000 469.390000
470.600000 493.460000
494.600000 962.700600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
3.8177 -9.3714 3.4 32.1 77.4 5.0373 3.3 ------ UNKNOWN
15.0363 39.4957 3.0 31.9 -177.0 3.5614 3.9 ------ UNKNOWN
59.6622 53.1680 2.5 49.3 -132.3 19.0144 4.7 ------ UNKNOWN
Plot creation:
Thu Aug 22 18:26:57 EDT 2024