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
293.7264 +21.8917 0.0032 17.5 -122.6 1.9494 59.5 TRIG_01108538
------------------------------------------
Foreground time interval of the image:
-0.168 0.112 (delta_t = 0.280 [sec])
Background time interval of the image:
-239.880 -0.168 (delta_t = 239.712 [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 0.016000
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 0.016000
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 0.016000
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 -0.168 sec. to 0.112 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.03151 ( )
Norm@50keV : 0.230721 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 415.51 using 59 PHA bins.
# Reduced chi-squared = 7.2897 for 57 degrees of freedom
# Null hypothesis probability = 6.433482e-56
Photon flux (15-150 keV) in 0.28 sec: 64.9215 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 7.87646e-07 ( 0 0 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.168 sec. to 0.112 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.264933 ( -0.371015 0.338554 )
Epeak [keV] : 28.0666 ( -2.27126 1.93081 )
Norm@50keV : 7.61603 ( -2.69169 4.72576 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.60 using 59 PHA bins.
# Reduced chi-squared = 1.153 for 56 degrees of freedom
# Null hypothesis probability = 2.015053e-01
Photon flux (15-150 keV) in 0.28 sec: 57.1298 ( -2.472 2.4906 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.55527e-07 ( 0 0 ) ergs/cm2
Band function
Time interval is from -0.168 sec. to 0.112 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.265259 ( -0.340459 0.348059 )
beta : -10.0000 ( 10 10 )
Epeak [keV] : 28.0576 ( -2.2677 1.93193 )
Norm@50keV : 7.61515 ( -2.6847 4.74119 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.60 using 59 PHA bins.
# Reduced chi-squared = 1.175 for 55 degrees of freedom
# Null hypothesis probability = 1.762389e-01
Photon flux (15-150 keV) in 0.28 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 7.58162e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 8.49046 ( )
R^2/D10^2 : 51.0526 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 119.79 using 59 PHA bins.
# Reduced chi-squared = 2.1017 for 57 degrees of freedom
# Null hypothesis probability = 2.310352e-06
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.941e-07 1.149e-08
25- 50 3.756e-07 1.176e-08
50-150 1.195e-07 9.450e-09
15-150 6.892e-07 2.268e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 28.1993 (-1.26545 1.3044)
Norm : 539.023 (-33.2339 35.7559)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.972e-07 1.330e-08
25- 50 3.279e-07 9.800e-09
50-150 1.653e-07 1.113e-08
15-150 7.904e-07 2.506e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.79751 (-0.774885 0.708384)
R1^2/D10^2 : 158.580 (-49.0244 95.5914)
kT2 [keV] : 11.6948 (-1.1074 1.33733)
R2^2/D10^2 : 7.13716 (-3.66011 6.34735)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.461e-07 3.171e-08
25- 50 3.502e-07 5.072e-08
50-150 1.560e-07 4.119e-08
15-150 7.523e-07 1.072e-07
Peak spectrum fit
Power-law model
Time interval is from -0.526 sec. to 0.474 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.74214 ( )
Norm@50keV : 7.89489E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 207.61 using 59 PHA bins.
# Reduced chi-squared = 3.6422 for 57 degrees of freedom
# Null hypothesis probability = 5.468981e-19
Photon flux (15-150 keV) in 1 sec: 18.1229 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 8.5262e-07 ( 0 0 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.526 sec. to 0.474 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.225512 ( -0.462662 0.425614 )
Epeak [keV] : 28.1346 ( -2.52436 2.02052 )
Norm@50keV : 2.29063 ( -0.995628 1.98664 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.93 using 59 PHA bins.
# Reduced chi-squared = 0.9095 for 56 degrees of freedom
# Null hypothesis probability = 6.665621e-01
Photon flux (15-150 keV) in 1 sec: 16.1577 ( -0.7339 0.7386 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.62122e-07 ( -2.9861e-08 3.0103e-08 ) ergs/cm2
Band function
Time interval is from -0.526 sec. to 0.474 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 7.28724E-02 ( -0.534684 0.680955 )
beta : -4.40352 ( 4.40293 0.545713 )
Epeak [keV] : 28.6788 ( -2.27219 1.7922 )
Norm@50keV : 3.56885 ( -1.90323 6.02767 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.08 using 59 PHA bins.
# Reduced chi-squared = 0.8924 for 55 degrees of freedom
# Null hypothesis probability = 6.990326e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 7.68438e-07 ( -7.68431e-07 -3.0421e-08 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 8.32434 (-0.246244 0.251967)
R^2/D10^2 : 15.7569 (-2.0038 2.30323)
(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 2.030e-07 1.175e-08
25- 50 3.803e-07 1.280e-08
50-150 1.136e-07 1.045e-08
15-150 6.969e-07 2.270e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 29.8477 (-1.68267 1.8112)
Norm : 143.571 (-10.1232 10.8824)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.914e-07 1.375e-08
25- 50 3.321e-07 1.100e-08
50-150 1.806e-07 1.520e-08
15-150 8.042e-07 2.715e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.18895 (-1.21828 0.925514)
R1^2/D10^2 : 37.5783 (-12.0182 31.5132)
kT2 [keV] : 12.3666 (-2.14937 3.9379)
R2^2/D10^2 : 1.36492 (-1.10475 3.24122)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.439e-07 3.705e-08
25- 50 3.570e-07 5.530e-08
50-150 1.573e-07 6.104e-08
15-150 7.583e-07 1.363e-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: 3.03151 ( )
Norm@50keV : 0.230721 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 415.51 using 59 PHA bins.
# Reduced chi-squared = 7.2897 for 57 degrees of freedom
# Null hypothesis probability = 6.433482e-56
Photon flux (15-150 keV) in 0.28 sec: 64.9215 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 7.87646e-07 ( 0 0 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.264933 ( -0.371015 0.338554 )
Epeak [keV] : 28.0666 ( -2.27126 1.93081 )
Norm@50keV : 7.61603 ( -2.69169 4.72576 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.60 using 59 PHA bins.
# Reduced chi-squared = 1.153 for 56 degrees of freedom
# Null hypothesis probability = 2.015053e-01
Photon flux (15-150 keV) in 0.28 sec: 57.1298 ( -2.472 2.4906 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.55527e-07 ( 0 0 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.265259 ( -0.340459 0.348059 )
beta : -10.0000 ( 10 10 )
Epeak [keV] : 28.0576 ( -2.2677 1.93193 )
Norm@50keV : 7.61515 ( -2.6847 4.74119 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.60 using 59 PHA bins.
# Reduced chi-squared = 1.175 for 55 degrees of freedom
# Null hypothesis probability = 1.762389e-01
Photon flux (15-150 keV) in 0.28 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 7.58162e-07 ( 0 0 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 2.62e-07
S(50-100 keV) = 1.28e-07
T90 vs. Hardness ratio plot
T90 = 0.111999988555908 sec.
Hardness ratio (energy fluence ratio) = 0.48855
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.973112
Count Ratio (50-100 keV) / (15-25 keV) = 0.232234
Mask shadow pattern
IMX = -1.700441619695643E-01, IMY = 2.663493240192547E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.016000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.016000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.016000
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:
-239.880000 -0.168000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.3392 35.4575 6.4 41.1 171.8 1.4078 1.8 9.0 Her X-1
263.0841 -24.5825 0.0 37.8 66.8 -2.0475 -1.6 10.6 GX 1+4
268.3183 -1.6547 0.0 19.0 98.3 -0.9384 -1.8 12.5 SW J1753.5-0127
270.1086 -25.0207 3.5 34.7 57.3 2.8777 3.3 10.2 GX 5-1
270.2298 -25.7569 4.5 35.3 56.6 2.3244 2.6 4.0 GRS 1758-258
273.8340 -14.0507 4.3 23.4 62.1 1.3519 2.6 10.0 GX 17+2
275.9290 -30.3358 4.5 37.7 45.8 2.2259 2.6 1.9 H1820-303
285.0416 -24.9179 164.8 31.1 33.1 0.0401 0.1 0.3 HT1900.1-2455
288.8069 10.8691 4.2 5.6 -115.1 1.0433 2.7 4.6 GRS 1915+105
299.5883 35.1985 0.6 31.7 -126.1 11.2457 20.6 0.2 Cyg X-1
307.9117 40.9320 14.5 40.0 -121.7 0.6961 0.8 9.1 Cyg X-3
318.3283 -12.8669 2.6 37.6 -27.5 2.4705 4.5 ------ UNKNOWN
289.1837 41.8514 2.7 35.8 -143.6 2.3663 4.3 ------ UNKNOWN
304.4999 45.0619 2.3 42.2 -128.2 4.5142 5.1 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-0.168000 0.112000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.4601 35.3362 46.1 40.9 171.8 -0.0133 -0.2 0.4 Her X-1
263.0841 -24.5825 0.0 37.8 66.8 -0.0766 -1.0 10.6 GX 1+4
268.1669 -1.4145 0.0 19.1 99.1 -0.0401 -1.1 12.3 SW J1753.5-0127
270.1010 -25.0580 13.7 34.7 57.3 -0.0551 -0.8 10.0 GX 5-1
270.2392 -25.9115 0.0 35.4 56.4 -0.0635 -0.9 10.7 GRS 1758-258
273.8344 -13.9682 8.9 23.3 62.3 0.0503 1.3 10.8 GX 17+2
276.1000 -30.3708 5.2 37.7 45.6 -0.1430 -2.2 9.1 H1820-303
284.9040 -24.8791 6.2 31.1 33.4 0.0790 1.9 7.6 HT1900.1-2455
288.6392 11.0252 4.9 5.7 -117.4 -0.0713 -2.3 10.5 GRS 1915+105
299.5409 35.0379 8.1 31.6 -126.0 0.0616 1.4 10.1 Cyg X-1
308.0645 40.8130 7.2 40.0 -121.4 -0.1092 -1.6 8.6 Cyg X-3
244.0105 17.9222 2.6 42.3 141.9 0.3286 4.5 ------ UNKNOWN
254.5723 37.4742 3.0 42.2 174.3 0.2074 3.9 ------ UNKNOWN
319.7618 -38.1008 2.2 54.4 -0.8 0.6024 5.3 ------ UNKNOWN
248.9906 48.6176 2.8 52.6 -177.9 0.3632 4.1 ------ UNKNOWN
293.7264 21.8917 0.2 17.5 -122.6 1.9493 59.5 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
209.320600 719.280000
720.120000 902.620000
904.120000 962.171200
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
285.0428 -24.9809 16.1 37.4 96.9 -2.0812 -0.7 3.6 HT1900.1-2455
288.9136 10.9816 306.6 43.0 153.8 0.1312 0.0 7.1 GRS 1915+105
299.5314 35.1825 2.5 55.0 -175.3 19.3764 4.6 3.1 Cyg X-1
308.0580 40.9214 13.7 57.6 -165.1 5.1632 0.8 3.0 Cyg X-3
326.2069 38.3023 5.4 53.3 -148.7 8.8122 2.1 2.0 Cyg X-2
285.2176 5.1604 2.6 43.0 143.7 16.9140 4.4 ------ UNKNOWN
335.2126 -51.6005 2.3 37.9 16.9 9.2836 5.1 ------ UNKNOWN
358.2199 7.2506 2.3 40.9 -91.7 25.2496 5.0 447.9 UNKNOWN
Plot creation:
Tue May 31 20:17:26 EDT 2022