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
257.6615 -39.0810 0.0305 24.2 146.0 1.4832 6.3 TRIG_01186302
------------------------------------------
Foreground time interval of the image:
0.000 88.000 (delta_t = 88.000 [sec])
Background time interval of the image:
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 0.000 sec. to 88.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.70662 ( -0.275276 0.30059 )
Norm@50keV : 7.74523E-04 ( -0.000166675 0.0001683 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.56 using 59 PHA bins.
# Reduced chi-squared = 1.133 for 57 degrees of freedom
# Null hypothesis probability = 2.293610e-01
Photon flux (15-150 keV) in 88 sec: 0.173622 ( -0.0223944 0.0224128 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.26761e-07 ( -1.06047e-07 1.09465e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 88.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 3.06819E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 91.48 using 59 PHA bins.
# Reduced chi-squared = 1.634 for 56 degrees of freedom
# Null hypothesis probability = 1.936616e-03
Photon flux (15-150 keV) in 88 sec: 0.160030 ( -0.023665 0.023751 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.00724e-07 ( -9.02299e-08 1.07197e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 88.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.578737 ( -3.0281 2.82811 )
beta : -4.34554 ( 4.21914 1.19716 )
Epeak [keV] : 24.5911 ( -6.42758 3.82697 )
Norm@50keV : 0.123334 ( -0.121365 27.6062 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.86 using 59 PHA bins.
# Reduced chi-squared = 1.052 for 55 degrees of freedom
# Null hypothesis probability = 3.702682e-01
Photon flux (15-150 keV) in 88 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] : 6.74719 (-0.757276 0.847284)
R^2/D10^2 : 0.379729 (-0.155371 0.266591)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.78 using 59 PHA bins.
# Reduced chi-squared = 1.031 for 57 degrees of freedom
# Null hypothesis probability = 4.101765e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.349e-07 5.601e-08
25- 50 2.992e-07 6.090e-08
50-150 4.332e-08 1.843e-08
15-150 5.774e-07 9.865e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 24.4704 (-5.63411 8.12562)
Norm : 1.67996 (-0.449054 0.635933)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.670e-07 4.858e-08
25- 50 2.699e-07 5.148e-08
50-150 1.112e-07 5.496e-08
15-150 6.480e-07 1.049e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 62.8540 (-61.1878 -61.1878)
R1^2/D10^2 : 3.44691E-05 (-3.52383e-05 0.490934)
kT2 [keV] : 6.50792 (-6.50534 0.893615)
R2^2/D10^2 : 0.433438 (-0.182671 4.63802)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.483e-07 1.252e-07
25- 50 2.958e-07 1.565e-07
50-150 5.337e-08 3.323e-08
15-150 5.975e-07 2.800e-07
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 88.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.70662 ( -0.275276 0.30059 )
Norm@50keV : 7.74523E-04 ( -0.000166675 0.0001683 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.56 using 59 PHA bins.
# Reduced chi-squared = 1.133 for 57 degrees of freedom
# Null hypothesis probability = 2.293610e-01
Photon flux (15-150 keV) in 88 sec: 0.173622 ( -0.0223944 0.0224128 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.26761e-07 ( -1.06047e-07 1.09465e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 88.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 3.06819E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 91.48 using 59 PHA bins.
# Reduced chi-squared = 1.634 for 56 degrees of freedom
# Null hypothesis probability = 1.936616e-03
Photon flux (15-150 keV) in 88 sec: 0.160030 ( -0.023665 0.023751 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.00724e-07 ( -9.02299e-08 1.07197e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 88.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.578737 ( -3.0281 2.82811 )
beta : -4.34554 ( 4.21914 1.19716 )
Epeak [keV] : 24.5911 ( -6.42758 3.82697 )
Norm@50keV : 0.123334 ( -0.121365 27.6062 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.86 using 59 PHA bins.
# Reduced chi-squared = 1.052 for 55 degrees of freedom
# Null hypothesis probability = 3.702682e-01
Photon flux (15-150 keV) in 88 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] : 6.74719 (-0.757276 0.847284)
R^2/D10^2 : 0.379729 (-0.155371 0.266591)
(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 2.349e-07 5.333e-08
25- 50 2.992e-07 6.367e-08
50-150 4.332e-08 1.840e-08
15-150 5.774e-07 1.145e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 24.4704 (-5.63411 8.12562)
Norm : 1.67996 (-0.449054 0.635933)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.670e-07 4.726e-08
25- 50 2.699e-07 5.302e-08
50-150 1.112e-07 5.328e-08
15-150 6.480e-07 1.145e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 62.8540 (-61.1878 -61.1878)
R1^2/D10^2 : 3.44691E-05 (-3.52383e-05 0.490934)
kT2 [keV] : 6.50792 (-6.50534 0.893615)
R2^2/D10^2 : 0.433438 (-0.182671 4.63802)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.483e-07 1.225e-07
25- 50 2.958e-07 1.641e-07
50-150 5.337e-08 3.347e-08
15-150 5.975e-07 2.996e-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: 2.70662 ( -0.275276 0.30059 )
Norm@50keV : 7.74523E-04 ( -0.000166675 0.0001683 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.56 using 59 PHA bins.
# Reduced chi-squared = 1.133 for 57 degrees of freedom
# Null hypothesis probability = 2.293610e-01
Photon flux (15-150 keV) in 88 sec: 0.173622 ( -0.0223944 0.0224128 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.26761e-07 ( -1.06047e-07 1.09465e-07 ) 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 : 3.06819E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 91.48 using 59 PHA bins.
# Reduced chi-squared = 1.634 for 56 degrees of freedom
# Null hypothesis probability = 1.936616e-03
Photon flux (15-150 keV) in 88 sec: 0.160030 ( -0.023665 0.023751 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.00724e-07 ( -9.02299e-08 1.07197e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.578737 ( -3.0281 2.82811 )
beta : -4.34554 ( 4.21914 1.19716 )
Epeak [keV] : 24.5911 ( -6.42758 3.82697 )
Norm@50keV : 0.123334 ( -0.121365 27.6062 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.86 using 59 PHA bins.
# Reduced chi-squared = 1.052 for 55 degrees of freedom
# Null hypothesis probability = 3.702682e-01
Photon flux (15-150 keV) in 88 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) = 2.44e-07
S(50-100 keV) = 1.50e-07
T90 vs. Hardness ratio plot
T90 = 88 sec.
Hardness ratio (energy fluence ratio) = 0.614754
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.828653
Count Ratio (50-100 keV) / (15-25 keV) = 0.113048
Mask shadow pattern
IMX = -3.728179678700713E-01, IMY = -2.513389062577012E-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:
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
0.000000 88.000000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
245.1600 -15.5189 0.0 1.9 -13.5 -0.3212 -1.5 12.7 Sco X-1
254.3907 35.4049 6.5 53.5 -0.8 -1.1172 -1.8 5.0 Her X-1
256.1893 -37.7053 0.0 22.4 146.9 0.1929 0.8 12.7 4U 1700-377
256.2725 -36.3149 7.0 21.3 144.9 -0.3800 -1.6 10.2 GX 349+2
263.1104 -24.6067 4.1 18.1 106.4 -0.6853 -2.8 10.0 GX 1+4
264.6045 -44.5987 3.4 31.7 143.3 1.0642 3.4 10.7 4U 1735-44
268.2287 -1.3862 4.4 27.7 47.1 -0.7279 -2.6 9.3 SW J1753.5-0127
270.3811 -25.0467 3.5 24.6 102.4 -0.9302 -3.3 5.6 GX 5-1
270.1403 -25.6496 9.2 24.5 103.9 0.3413 1.3 10.4 GRS 1758-258
274.1593 -14.0639 10.4 28.0 77.3 0.3453 1.1 9.1 GX 17+2
275.7541 -30.2492 0.0 30.6 110.5 0.1785 0.5 11.3 H1820-303
285.1486 -24.9860 47.9 37.8 98.5 -0.1325 -0.2 7.3 HT1900.1-2455
263.0014 -33.8391 347.9 22.9 129.3 0.0087 0.0 0.7 GX 354-0
257.6616 -39.0811 1.8 24.2 146.0 1.4821 6.3 ------ UNKNOWN
253.0381 1.7394 2.8 20.6 12.5 0.8737 4.1 ------ UNKNOWN
245.2539 -17.3976 0.2 0.0 -82.2 11.3305 54.9 ------ UNKNOWN
216.4409 -52.6779 2.9 41.9 -164.0 1.2588 4.0 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
181.000000 243.081400
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
186.5592 -62.8223 7.6 47.5 -142.4 0.5276 1.5 4.1 GX 301-2
245.1053 -15.7913 0.0 25.8 -27.0 -0.0211 -0.1 11.6 Sco X-1
256.0201 -37.9938 7.2 1.7 -47.8 -0.2436 -1.6 9.1 4U 1700-377
256.5264 -36.2719 4.9 3.0 -15.9 0.3709 2.4 10.1 GX 349+2
263.1617 -24.6653 7.3 15.2 21.2 0.2347 1.6 9.6 GX 1+4
264.5281 -44.4191 18.3 7.4 139.9 0.0876 0.6 9.4 4U 1735-44
268.3525 -1.4643 8.6 38.9 18.9 0.3700 1.3 1.2 SW J1753.5-0127
270.2979 -25.1326 5.6 17.6 42.8 -0.3157 -2.1 3.3 GX 5-1
270.1183 -25.6426 10.2 17.1 43.3 -0.1798 -1.2 11.6 GRS 1758-258
274.0531 -14.0017 26.1 29.0 36.2 0.0963 0.4 3.4 GX 17+2
275.9459 -30.2496 16.1 17.4 66.7 -0.1185 -0.7 7.1 H1820-303
285.0198 -25.0644 12.9 27.0 68.5 0.2150 0.9 8.7 HT1900.1-2455
262.9722 -33.6859 120.7 6.9 41.8 -0.0138 -0.1 9.0 GX 354-0
309.4924 -80.5282 3.8 45.5 171.2 0.9017 3.1 ------ UNKNOWN
257.6420 -39.0993 1.4 0.0 130.1 1.1940 8.0 ------ UNKNOWN
245.2448 -17.4036 0.3 24.2 -28.3 6.8011 45.3 ------ UNKNOWN
246.2782 10.7883 2.7 51.0 -12.7 1.4473 4.2 ------ UNKNOWN
129.2788 -78.1650 3.4 58.8 -167.5 2.9249 3.4 ------ UNKNOWN
Plot creation:
Mon Aug 21 20:23:19 EDT 2023