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
245.1510 -16.3363 0.0112 36.5 172.1 4.5278 17.3 TRIG_01219905
------------------------------------------
Foreground time interval of the image:
-12.699 71.401 (delta_t = 84.100 [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 -63.796 sec. to 110.792 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 5.78904 ( -0.335741 0.340878 )
Norm@50keV : 1.88678E-04 ( -5.0594e-05 6.42939e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.08 using 59 PHA bins.
# Reduced chi-squared = 0.9312 for 57 degrees of freedom
# Null hypothesis probability = 6.229107e-01
Photon flux (15-150 keV) in 174.6 sec: 0.628830 ( -0.0542807 0.0546779 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.33413e-06 ( -2.62899e-07 2.64175e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -63.796 sec. to 110.792 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 2.92022E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 414.25 using 59 PHA bins.
# Reduced chi-squared = 7.3973 for 56 degrees of freedom
# Null hypothesis probability = 4.056422e-56
Photon flux (15-150 keV) in 174.6 sec: 0.607639 ( -0.061231 0.059912 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.17611e-06 ( -2.95598e-07 2.89504e-07 ) ergs/cm2
Band function
Time interval is from -63.796 sec. to 110.792 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 2.43299E-02 ( -3.98347 2.3135 )
beta : -7.66410 ( 7.52361 1.50334 )
Epeak [keV] : 7.38580 ( -2.402 2.22597 )
Norm@50keV : 10.3897 ( -6.08051 67587.3 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.70 using 59 PHA bins.
# Reduced chi-squared = 0.8309 for 55 degrees of freedom
# Null hypothesis probability = 8.098940e-01
Photon flux (15-150 keV) in 174.6 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] : 2.72715 (-0.168937 0.188883)
R^2/D10^2 : 160.597 (-65.2252 107.596)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.97 using 59 PHA bins.
# Reduced chi-squared = 0.8241 for 57 degrees of freedom
# Null hypothesis probability = 8.256656e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.828e-06 5.133e-07
25- 50 2.918e-07 5.736e-08
50-150 2.083e-10 1.226e-10
15-150 3.120e-06 4.417e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 4.88759 (-0.448146 0.530116)
Norm : 154.068 (-53.6907 81.6537)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.865e-06 3.920e-07
25- 50 3.438e-07 6.417e-08
50-150 1.587e-09 9.340e-10
15-150 3.210e-06 3.937e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.79090 (-9.15548 -9.15548)
R1^2/D10^2 : 1.99807E-02 (-0.0163755 197.047)
kT2 [keV] : 2.59274 (-2.61963 0.112426)
R2^2/D10^2 : 227.075 (-96.7055 280.019)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.141e-06 1.000e-01
25- 50 4.668e-07 8.637e-01
50-150 1.888e-09 2.225e+01
15-150 2.610e-06 2.164e+01
Peak spectrum fit
Power-law model
Time interval is from -47.248 sec. to -46.248 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.63837 ( -0.962571 1.42678 )
Norm@50keV : 2.04124E-03 ( -0.00204122 0.00252519 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.68 using 59 PHA bins.
# Reduced chi-squared = 0.7663 for 57 degrees of freedom
# Null hypothesis probability = 9.026373e-01
Photon flux (15-150 keV) in 1 sec: 0.924855 ( -0.28501 0.286086 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.50474e-08 ( -1.34107e-08 1.605e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -47.248 sec. to -46.248 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 1.53204E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.14 using 59 PHA bins.
# Reduced chi-squared = 1.002 for 56 degrees of freedom
# Null hypothesis probability = 4.697655e-01
Photon flux (15-150 keV) in 1 sec: 0.917334 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.5015e-08 ( -1.35147e-08 1.55394e-08 ) ergs/cm2
Band function
Time interval is from -47.248 sec. to -46.248 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -6.76790 ( 4.28481 6.7679 )
beta : -3.63832 ( -1.42873 0.962723 )
Epeak [keV] : 90.3509 ( -90.3509 -90.3509 )
Norm@50keV : 0.277446 ( -0.277431 0.343209 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.68 using 59 PHA bins.
# Reduced chi-squared = 0.7942 for 55 degrees of freedom
# Null hypothesis probability = 8.641020e-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] : 3.70325 (-1.02529 1.30905)
R^2/D10^2 : 35.8347 (-35.8347 199.271)
(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 2.215e-08 1.260e-08
25- 50 6.382e-09 4.142e-09
50-150 4.780e-11 5.105e-11
15-150 2.858e-08 1.739e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.04688 (-3.96244 10.2762)
Norm : 38.2469 (-38.2465 128.314)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.137e-08 1.229e-08
25- 50 8.000e-09 5.155e-09
50-150 4.130e-10 4.584e-10
15-150 2.978e-08 1.756e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.38295 (-1.06485 1.25467)
R1^2/D10^2 : 54.7534 (-54.7444 488.135)
kT2 [keV] : 20.2373 (-20.5856 -20.5856)
R2^2/D10^2 : 1.06320E-02 (-0.0103809 52.8245)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.163e-08 1.201e-08
25- 50 8.721e-09 4.792e-09
50-150 1.277e-08 9.265e-09
15-150 4.312e-08 2.318e-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: 5.95557 ( -0.427526 0.438902 )
Norm@50keV : 1.55538E-04 ( -5.41181e-05 7.5126e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.18 using 59 PHA bins.
# Reduced chi-squared = 0.6874 for 57 degrees of freedom
# Null hypothesis probability = 9.655762e-01
Photon flux (15-150 keV) in 84.1 sec: 0.612177 ( -0.0601136 0.0602406 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.54976e-06 ( -1.44179e-07 1.44294e-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 : 3.18908E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 282.24 using 59 PHA bins.
# Reduced chi-squared = 5.0400 for 56 degrees of freedom
# Null hypothesis probability = 6.387270e-32
Photon flux (15-150 keV) in 84.1 sec: 0.609579 ( -0.065053 0.064523 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.50585e-06 ( -1.51615e-07 1.49706e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.90209 ( -6.66554 4.16255 )
beta : -7.45181 ( 7.21961 1.19263 )
Epeak [keV] : 11.7507 ( -0.928087 0.49258 )
Norm@50keV : 3.53004E+04 ( -35292 359628 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 32.47 using 59 PHA bins.
# Reduced chi-squared = 0.5904 for 55 degrees of freedom
# Null hypothesis probability = 9.933223e-01
Photon flux (15-150 keV) in 84.1 sec: 0.505886 ( ) 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) = 4.46e-07
S(50-100 keV) = 3.23e-08
T90 vs. Hardness ratio plot
T90 = 157.423999905586 sec.
Hardness ratio (energy fluence ratio) = 0.0724215
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.117384
Count Ratio (50-100 keV) / (15-25 keV) = -0.00537766
Mask shadow pattern
IMX = -7.341650195063706E-01, IMY = -1.016367993997669E-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:
-12.699380 71.400590
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.1039 -60.5993 8.8 33.1 11.3 -0.3046 -1.3 6.4 Cen X-3
186.8953 -62.6365 241.5 25.2 6.6 0.0089 0.0 10.4 GX 301-2
245.0679 -15.7340 3.8 37.1 171.7 -0.7597 -3.0 7.6 Sco X-1
255.9807 -37.6870 16.1 23.9 -147.4 0.1278 0.7 9.4 4U 1700-377
256.2691 -36.4655 8.3 24.9 -149.2 -0.2597 -1.4 8.4 GX 349+2
263.0071 -24.7502 9.7 37.4 -156.6 0.2998 1.2 0.3 GX 1+4
264.6100 -44.2849 11.1 25.8 -125.7 0.2100 1.0 11.4 4U 1735-44
270.2911 -25.1338 14.6 41.4 -148.2 0.2301 0.8 3.3 GX 5-1
270.1704 -25.5969 3.5 40.9 -147.9 0.9526 3.4 11.3 GRS 1758-258
274.0745 -14.0830 7.0 52.2 -154.0 -0.9436 -1.6 4.9 GX 17+2
276.0697 -30.2574 0.0 41.3 -137.2 0.4615 1.3 10.0 H1820-303
262.8588 -33.6510 0.0 30.7 -145.9 0.5418 2.6 12.8 GX 354-0
153.9240 -60.1605 2.8 40.9 9.0 1.1260 4.2 ------ UNKNOWN
245.1510 -16.3383 0.6 36.5 172.1 4.6349 18.2 ------ UNKNOWN
125.8349 -65.6462 2.4 49.9 -5.8 1.6994 4.9 ------ UNKNOWN
265.2062 -53.8307 2.7 23.5 -103.3 0.9095 4.3 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-12.699380 71.400590
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.0942 -60.5931 5.7 33.1 11.4 -0.4962 -2.0 6.8 Cen X-3
186.3574 -62.8351 55.8 25.5 6.3 -0.0395 -0.2 9.1 GX 301-2
245.0813 -15.7113 3.9 37.1 171.7 -0.7704 -2.9 7.3 Sco X-1
255.9807 -37.6870 10.8 23.9 -147.4 0.1973 1.1 9.4 4U 1700-377
256.2518 -36.5064 7.4 24.8 -149.2 -0.3004 -1.6 10.2 GX 349+2
263.0080 -24.7501 9.2 37.4 -156.6 0.3168 1.3 0.3 GX 1+4
264.5729 -44.2789 9.0 25.8 -125.7 0.2675 1.3 12.6 4U 1735-44
270.3649 -25.2166 14.8 41.3 -148.1 0.2405 0.8 9.3 GX 5-1
270.1697 -25.6104 4.3 40.9 -147.9 0.8209 2.7 10.7 GRS 1758-258
274.0868 -14.0843 7.3 52.2 -154.0 -0.9352 -1.6 5.5 GX 17+2
276.0697 -30.2574 0.0 41.3 -137.2 0.3710 1.1 10.0 H1820-303
262.8588 -33.6510 0.0 30.7 -145.9 0.5430 2.5 12.8 GX 354-0
153.9127 -60.1512 2.8 40.9 9.0 1.1516 4.2 ------ UNKNOWN
245.1510 -16.3364 0.7 36.5 172.1 4.5279 17.2 ------ UNKNOWN
153.9482 -69.3782 3.9 38.6 -5.0 0.7102 2.9 ------ UNKNOWN
125.8499 -65.6471 2.5 49.9 -5.8 1.6643 4.7 ------ UNKNOWN
251.8232 -47.7886 2.5 16.3 -125.6 0.7953 4.6 ------ UNKNOWN
265.2201 -53.8237 3.0 23.5 -103.3 0.8145 3.8 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
154.500600 205.760000
207.000000 390.150000
391.000000 479.250100
480.000000 663.020000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
245.0836 -15.8057 22.0 0.5 166.2 -0.4920 -0.5 11.6 Sco X-1
254.5469 35.4818 6.1 52.6 -178.3 -5.4836 -1.9 9.4 Her X-1
256.1241 -37.9925 7.5 23.7 -29.8 1.5700 1.5 11.0 4U 1700-377
256.5981 -36.5602 5.1 22.6 -32.4 2.3602 2.3 11.4 GX 349+2
262.8375 -24.8866 9.4 18.6 -67.7 1.4051 1.2 12.6 GX 1+4
264.9187 -44.3601 6.3 32.6 -34.6 -2.1712 -1.8 9.3 4U 1735-44
268.3684 -1.5940 8.1 27.2 -128.4 1.6898 1.4 8.5 SW J1753.5-0127
270.3179 -24.9991 8.3 25.0 -73.5 -1.7133 -1.4 5.1 GX 5-1
270.4681 -25.6563 8.4 25.4 -72.1 1.7101 1.4 10.4 GRS 1758-258
274.0045 -13.9034 5.1 27.9 -99.0 -2.9621 -2.3 8.0 GX 17+2
275.9187 -30.4282 7.8 31.4 -65.7 2.1362 1.5 3.7 H1820-303
284.9031 -24.8199 69.7 38.0 -78.3 0.3989 0.2 9.4 HT1900.1-2455
262.8281 -33.9835 131.3 23.7 -46.7 -0.0987 -0.1 12.0 GX 354-0
214.9536 -29.6803 3.0 30.7 50.9 5.2396 3.8 ------ UNKNOWN
245.1605 -16.3298 0.4 0.0 -126.4 31.3400 33.2 ------ UNKNOWN
236.4469 -70.8231 2.7 54.7 -4.4 8.8887 4.3 ------ UNKNOWN
256.2219 -38.5236 1.8 24.2 -29.4 6.7575 6.6 ------ UNKNOWN
290.2348 -61.4149 2.1 55.2 -32.3 27.6479 5.4 ------ UNKNOWN
Plot creation:
Thu Mar 14 02:09:40 EDT 2024