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
261.8924 -16.1515 0.0559 49.2 169.4 0.8215 3.4 TRIG_01187203
------------------------------------------
Foreground time interval of the image:
33.000 69.901 (delta_t = 36.901 [sec])
Background time interval of the image:
-60.000 -52.778 (delta_t = 7.222 [sec])
-52.000 3.170 (delta_t = 55.170 [sec])
4.000 15.785 (delta_t = 11.785 [sec])
17.000 33.000 (delta_t = 16.000 [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
Multiple GTIs in the spectrum
tstart tstop
33.000000 92.350000
94.000000 239.000000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.97275 ( -0.0474073 0.0478754 )
Norm@50keV : 1.07824E-02 ( -0.000276382 0.000275352 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 113.80 using 59 PHA bins.
# Reduced chi-squared = 1.9965 for 57 degrees of freedom
# Null hypothesis probability = 1.175608e-05
Photon flux (15-150 keV) in 204.4 sec: 2.90724 ( -0.0857183 0.0866083 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.61538e-05 ( -5.93825e-07 5.95321e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
33.000000 92.350000
94.000000 239.000000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.80670 ( -0.287417 0.194663 )
Epeak [keV] : 7.24366 ( )
Norm@50keV : 4.52847E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.04 using 59 PHA bins.
# Reduced chi-squared = 0.7328 for 56 degrees of freedom
# Null hypothesis probability = 9.330815e-01
Photon flux (15-150 keV) in 204.4 sec: 2.55806 ( -0.10445 0.1064 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.35775e-05 ( -7.5444e-07 7.61799e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
33.000000 92.350000
94.000000 239.000000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.57586 ( -0.207148 0.557554 )
beta : -3.75103 ( -0.91836 0.32566 )
Epeak [keV] : 12.8444 ( -8.12952 7.44231 )
Norm@50keV : 6.21027E-02 ( -0.0213842 0.0728831 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.72 using 59 PHA bins.
# Reduced chi-squared = 0.6857 for 55 degrees of freedom
# Null hypothesis probability = 9.637526e-01
Photon flux (15-150 keV) in 204.4 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.63719e-05 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 8.49013 ( )
R^2/D10^2 : 1.84981 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 292.76 using 59 PHA bins.
# Reduced chi-squared = 5.1361 for 57 degrees of freedom
# Null hypothesis probability = 2.040123e-33
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.133e-06 2.146e-07
25- 50 9.934e-06 2.310e-07
50-150 3.160e-06 1.625e-07
15-150 1.823e-05 4.303e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 27.9033 (-1.10387 1.16452)
Norm : 21.4765 (-1.21228 1.28814)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.593e-06 3.168e-07
25- 50 9.422e-06 2.330e-07
50-150 4.682e-06 2.340e-07
15-150 2.270e-05 5.212e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.30092 (-0.554917 0.553252)
R1^2/D10^2 : 11.1119 (-3.61294 6.65204)
kT2 [keV] : 13.0555 (-1.17441 1.57182)
R2^2/D10^2 : 0.162244 (-0.0756964 0.113935)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.138e-06 6.807e-07
25- 50 9.368e-06 5.161e-07
50-150 4.760e-06 5.366e-07
15-150 2.227e-05 1.355e-06
Peak spectrum fit
Power-law model
Time interval is from 238.000 sec. to 239.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.86025 ( -0.193564 0.209395 )
Norm@50keV : 1.61145E-02 ( -0.00237174 0.00234217 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.54 using 59 PHA bins.
# Reduced chi-squared = 1.045 for 57 degrees of freedom
# Null hypothesis probability = 3.831904e-01
Photon flux (15-150 keV) in 1 sec: 4.01114 ( -0.360066 0.360896 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.82191e-07 ( -1.70517e-08 1.7202e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 238.000 sec. to 239.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 6.26882E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 132.99 using 59 PHA bins.
# Reduced chi-squared = 2.3748 for 56 degrees of freedom
# Null hypothesis probability = 3.306692e-08
Photon flux (15-150 keV) in 1 sec: 3.95560 ( -0.37786 0.3769 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.77072e-07 ( -1.9672e-08 2.0019e-08 ) ergs/cm2
Band function
Time interval is from 238.000 sec. to 239.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.89436 ( 0.84445 0.84445 )
beta : -3.16695 ( 3.15966 0.428924 )
Epeak [keV] : 3.49477 ( -3.50368 6.37453 )
Norm@50keV : 7.04980E-02 ( -0.0224645 26001 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.18 using 59 PHA bins.
# Reduced chi-squared = 1.058 for 55 degrees of freedom
# Null hypothesis probability = 3.591299e-01
Photon flux (15-150 keV) in 1 sec: 2.53604 ( 4.46396 -0.52406 ) 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] : 6.55127 (-0.63553 0.689567)
R^2/D10^2 : 9.36898 (-3.40179 5.55299)
(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 5.999e-08 9.065e-09
25- 50 7.200e-08 8.405e-09
50-150 9.331e-09 3.331e-09
15-150 1.413e-07 1.530e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 24.0302 (-4.26754 5.35926)
Norm : 38.4546 (-8.0556 10.8324)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.860e-08 7.990e-09
25- 50 6.852e-08 6.670e-09
50-150 2.747e-08 8.025e-09
15-150 1.646e-07 1.570e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.05566 (-1.77211 1.00128)
R1^2/D10^2 : 25.8031 (-13.6198 129.588)
kT2 [keV] : 16.9651 (-7.79918 13.4862)
R2^2/D10^2 : 7.32667E-02 (-0.0653273 0.248317)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.988e-08 2.160e-08
25- 50 6.299e-08 1.639e-08
50-150 4.087e-08 2.392e-08
15-150 1.737e-07 5.257e-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: 2.69447 ( -0.106915 0.110713 )
Norm@50keV : 1.09516E-02 ( -0.000782475 0.000774907 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.21 using 59 PHA bins.
# Reduced chi-squared = 1.144 for 57 degrees of freedom
# Null hypothesis probability = 2.129421e-01
Photon flux (15-150 keV) in 36.9 sec: 2.43530 ( -0.130395 0.131016 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.29077e-06 ( -2.19536e-07 2.20185e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.95434 ( -0.558947 0.0380555 )
Epeak [keV] : 2.40739 ( -1.82162 15.9122 )
Norm@50keV : 2.99793E-02 ( -0.00431683 0.0344302 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.75 using 59 PHA bins.
# Reduced chi-squared = 1.031 for 56 degrees of freedom
# Null hypothesis probability = 4.104877e-01
Photon flux (15-150 keV) in 36.9 sec: 2.33555 ( -0.14388 0.14434 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.04162e-06 ( -2.59481e-07 2.64942e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.64384 ( -0.286138 6.23921 )
beta : -3.15546 ( 3.15394 0.425831 )
Epeak [keV] : 12.2578 ( -7.59894 10.3183 )
Norm@50keV : 4.83880E-02 ( -0.0212287 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.76 using 59 PHA bins.
# Reduced chi-squared = 1.032 for 55 degrees of freedom
# Null hypothesis probability = 4.091254e-01
Photon flux (15-150 keV) in 36.9 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.95559e-06 ( 0 0 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 8.73e-06
S(50-100 keV) = 4.45e-06
T90 vs. Hardness ratio plot
T90 = 186 sec.
Hardness ratio (energy fluence ratio) = 0.509737
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.83788
Count Ratio (50-100 keV) / (15-25 keV) = 0.225441
Mask shadow pattern
IMX = -1.137316820376665E+00, IMY = -2.121550937404745E-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:
-60.000000 -52.778300
-52.000000 3.170200
4.000000 15.785400
17.000000 33.000000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9011 -15.6365 3.8 54.7 -171.0 2.4539 3.1 4.5 Sco X-1
254.5408 35.2453 8.0 16.1 -97.6 0.3242 1.5 7.1 Her X-1
268.3830 -1.2993 6.0 33.4 163.9 0.5998 1.9 9.2 SW J1753.5-0127
274.0368 -14.1958 0.0 46.0 153.9 -1.3468 -1.9 9.7 GX 17+2
288.7385 11.1246 74.9 25.0 116.9 0.0437 0.2 11.3 GRS 1915+105
299.6167 35.2046 0.7 22.1 48.7 3.7597 16.5 1.3 Cyg X-1
308.0616 40.9472 4.1 29.2 36.6 0.7813 2.8 2.2 Cyg X-3
326.2267 38.2010 83.9 43.2 41.0 0.0689 0.1 7.7 Cyg X-2
261.9262 -16.2129 0.4 49.2 169.4 18.5966 27.4 ------ UNKNOWN
342.7731 68.8503 2.4 53.2 -0.3 2.3487 4.8 ------ UNKNOWN
233.9621 12.9040 2.9 40.7 -133.7 1.3600 3.9 ------ UNKNOWN
233.0862 17.6231 2.4 39.0 -126.7 1.6278 4.9 ------ UNKNOWN
225.9151 11.4674 2.6 48.1 -129.2 3.9813 4.4 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
33.000000 69.900600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
245.0651 -15.5622 8.4 54.6 -171.1 0.3925 1.4 6.8 Sco X-1
254.3846 35.3567 5.7 16.2 -97.2 0.2037 2.0 3.7 Her X-1
268.2963 -1.5839 6.2 33.7 164.0 -0.2021 -1.9 9.0 SW J1753.5-0127
273.8968 -14.0361 6.9 45.8 154.1 -0.4079 -1.7 6.3 GX 17+2
288.9681 11.0127 10.1 25.2 116.6 -0.1294 -1.2 10.8 GRS 1915+105
299.6362 35.1679 179.6 22.1 48.8 0.0062 0.1 3.0 Cyg X-1
308.2995 40.9045 5.0 29.4 36.7 0.2700 2.3 9.1 Cyg X-3
326.3727 38.2981 5.4 43.3 40.8 -0.5186 -2.1 9.6 Cyg X-2
244.6405 14.1148 3.6 31.6 -142.5 0.3442 3.2 ------ UNKNOWN
235.5682 -11.4676 2.8 56.4 -159.0 1.4788 4.2 ------ UNKNOWN
236.0004 24.5492 2.5 33.6 -118.0 0.6197 4.7 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
142.400600 243.091200
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
245.1276 -15.5651 0.0 43.9 -130.3 0.2343 0.3 9.7 Sco X-1
254.4856 35.3522 9.8 40.6 -49.6 0.6938 1.2 1.5 Her X-1
255.9842 -37.8417 17.1 50.5 -162.4 -0.5819 -0.7 0.2 4U 1700-377
256.5731 -36.3995 10.4 49.1 -161.7 -0.7822 -1.1 6.8 GX 349+2
263.1346 -24.8186 80.2 36.4 -158.1 0.0595 0.1 8.1 GX 1+4
264.6304 -44.5569 376.2 52.9 -173.9 0.0286 0.0 8.0 4U 1735-44
268.4999 -1.4870 17.2 17.0 -124.5 0.2200 0.7 8.2 SW J1753.5-0127
270.3016 -25.0449 7.1 33.2 -168.0 0.6085 1.6 2.3 GX 5-1
270.1821 -25.8675 39.3 34.0 -168.5 0.1123 0.3 9.9 GRS 1758-258
274.1244 -14.1800 5.3 21.9 -164.4 0.7304 2.2 11.0 GX 17+2
275.9612 -30.2202 7.5 36.4 -179.3 -0.6491 -1.5 9.0 H1820-303
285.0971 -24.8947 5.9 30.3 167.0 0.7275 2.0 3.7 HT1900.1-2455
288.8200 10.9923 6.6 7.3 27.9 -0.5552 -1.7 3.1 GRS 1915+105
299.5919 35.1963 1.0 33.1 12.3 4.8367 11.9 0.3 Cyg X-1
308.1309 41.0484 27.6 41.7 16.2 0.2431 0.4 5.8 Cyg X-3
326.1566 38.5063 17.9 50.4 31.5 1.2376 0.6 11.1 Cyg X-2
263.0302 -33.6938 13.1 43.9 -165.7 -0.4587 -0.9 8.7 GX 354-0
321.6376 -5.1678 3.0 38.9 93.8 3.6080 3.8 ------ UNKNOWN
319.8477 49.9319 2.9 53.7 16.5 5.5664 4.0 ------ UNKNOWN
314.9344 53.4059 2.9 54.2 10.8 6.0091 4.0 ------ UNKNOWN
261.9340 -16.2137 0.2 30.8 -146.1 24.0508 59.1 ------ UNKNOWN
UNKNOWN
UNKNOWN
Plot creation:
Sat Aug 26 16:11:01 EDT 2023