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
267.3962 -21.3636 0.0627 29.0 -165.0 0.4343 3.1 TRIG_00891843
------------------------------------------
Foreground time interval of the image:
0.000 64.000 (delta_t = 64.000 [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
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
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 64.000000
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 64.000000
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 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.00500 ( -0.685234 0.990198 )
Norm@50keV : 2.74145E-04 ( -0.000174835 0.000207225 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.33 using 59 PHA bins.
# Reduced chi-squared = 0.9883 for 57 degrees of freedom
# Null hypothesis probability = 5.000104e-01
Photon flux (15-150 keV) in 64 sec: 7.57301E-02 ( -0.0269167 0.0272529 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.12299e-07 ( -8.74016e-08 9.91898e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.11539 ( )
Epeak [keV] : 24.5090 ( )
Norm@50keV : 0.914585 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.55 using 59 PHA bins.
# Reduced chi-squared = 0.9383 for 56 degrees of freedom
# Null hypothesis probability = 6.063462e-01
Photon flux (15-150 keV) in 64 sec: 7.52701E-02 ( -0.0262001 0.0264289 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.95203e-07 ( -6.81523e-08 7.42349e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.87118 ( -4.53272 -2.46264 )
beta : -9.37167 ( 9.37164 19.3491 )
Epeak [keV] : 25.8271 ( -7.7861 6.9336 )
Norm@50keV : 14.5471 ( -14.5402 27.8371 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.44 using 59 PHA bins.
# Reduced chi-squared = 0.9535 for 55 degrees of freedom
# Null hypothesis probability = 5.729287e-01
Photon flux (15-150 keV) in 64 sec: 7.52938E-02 ( ) 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] : 6.16433 (-1.5762 1.95427)
R^2/D10^2 : 0.275206 (-0.275206 0.742762)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.59 using 59 PHA bins.
# Reduced chi-squared = 0.9226 for 57 degrees of freedom
# Null hypothesis probability = 6.411231e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.236e-08 5.520e-08
25- 50 9.763e-08 6.557e-08
50-150 9.974e-09 9.075e-09
15-150 2.000e-07 1.220e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 19.5835 (-8.7625 18.1747)
Norm : 0.992179 (-0.537775 1.27724)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.17 using 59 PHA bins.
# Reduced chi-squared = 0.9504 for 57 degrees of freedom
# Null hypothesis probability = 5.818857e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.672e-08 5.936e-08
25- 50 8.333e-08 5.436e-08
50-150 2.408e-08 2.175e-08
15-150 2.041e-07 1.287e-07
Double BB
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.59 using 59 PHA bins.
#Fit statistic : Chi-Squared = 52.48 using 59 PHA bins.
#Fit statistic : Chi-Squared = 52.39 using 59 PHA bins.
#Fit statistic : Chi-Squared = 52.36 using 59 PHA bins.
# Reduced chi-squared = 0.9563 for 55 degrees of freedom
# Reduced chi-squared = 0.9541 for 55 degrees of freedom
# Reduced chi-squared = 0.9525 for 55 degrees of freedom
# Reduced chi-squared = 0.9519 for 55 degrees of freedom
# Null hypothesis probability = 5.670927e-01
# Null hypothesis probability = 5.716192e-01
# Null hypothesis probability = 5.750344e-01
# Null hypothesis probability = 5.763110e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.300e-08 2.305e-02
25- 50 9.690e-08 2.027e-01
50-150 9.708e-09 4.509e+00
15-150 1.996e-07 4.906e+00
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.00500 ( -0.685234 0.990198 )
Norm@50keV : 2.74145E-04 ( -0.000174835 0.000207225 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.33 using 59 PHA bins.
# Reduced chi-squared = 0.9883 for 57 degrees of freedom
# Null hypothesis probability = 5.000104e-01
Photon flux (15-150 keV) in 64 sec: 7.57301E-02 ( -0.0269167 0.0272529 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.12299e-07 ( -8.74016e-08 9.91898e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.11539 ( )
Epeak [keV] : 24.5090 ( )
Norm@50keV : 0.914585 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.55 using 59 PHA bins.
# Reduced chi-squared = 0.9383 for 56 degrees of freedom
# Null hypothesis probability = 6.063462e-01
Photon flux (15-150 keV) in 64 sec: 7.52701E-02 ( -0.0262001 0.0264289 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.95203e-07 ( -6.81523e-08 7.42349e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.87118 ( -4.53272 -2.46264 )
beta : -9.37167 ( 9.37164 19.3491 )
Epeak [keV] : 25.8271 ( -7.7861 6.9336 )
Norm@50keV : 14.5471 ( -14.5402 27.8371 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.44 using 59 PHA bins.
# Reduced chi-squared = 0.9535 for 55 degrees of freedom
# Null hypothesis probability = 5.729287e-01
Photon flux (15-150 keV) in 64 sec: 7.52938E-02 ( ) 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] : 6.16433 (-1.5762 1.95427)
R^2/D10^2 : 0.275206 (-0.275206 0.742762)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.59 using 59 PHA bins.
# Reduced chi-squared = 0.9226 for 57 degrees of freedom
# Null hypothesis probability = 6.411231e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.236e-08 5.690e-08
25- 50 9.763e-08 5.850e-08
50-150 9.974e-09 8.694e-09
15-150 2.000e-07 1.274e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 19.5835 (-8.7625 18.1747)
Norm : 0.992179 (-0.537775 1.27724)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.17 using 59 PHA bins.
# Reduced chi-squared = 0.9504 for 57 degrees of freedom
# Null hypothesis probability = 5.818857e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.672e-08 5.923e-08
25- 50 8.333e-08 5.366e-08
50-150 2.408e-08 2.203e-08
15-150 2.041e-07 1.299e-07
Double BB
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.59 using 59 PHA bins.
#Fit statistic : Chi-Squared = 52.48 using 59 PHA bins.
#Fit statistic : Chi-Squared = 52.39 using 59 PHA bins.
#Fit statistic : Chi-Squared = 52.36 using 59 PHA bins.
# Reduced chi-squared = 0.9563 for 55 degrees of freedom
# Reduced chi-squared = 0.9541 for 55 degrees of freedom
# Reduced chi-squared = 0.9525 for 55 degrees of freedom
# Reduced chi-squared = 0.9519 for 55 degrees of freedom
# Null hypothesis probability = 5.670927e-01
# Null hypothesis probability = 5.716192e-01
# Null hypothesis probability = 5.750344e-01
# Null hypothesis probability = 5.763110e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.300e-08 2.251e-02
25- 50 9.690e-08 2.046e-01
50-150 9.708e-09 5.021e+00
15-150 1.996e-07 4.746e+00
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: 3.00500 ( -0.685234 0.990198 )
Norm@50keV : 2.74145E-04 ( -0.000174835 0.000207225 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.33 using 59 PHA bins.
# Reduced chi-squared = 0.9883 for 57 degrees of freedom
# Null hypothesis probability = 5.000104e-01
Photon flux (15-150 keV) in 64 sec: 7.57301E-02 ( -0.0269167 0.0272529 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.12299e-07 ( -8.74016e-08 9.91898e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.11539 ( )
Epeak [keV] : 24.5090 ( )
Norm@50keV : 0.914585 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.55 using 59 PHA bins.
# Reduced chi-squared = 0.9383 for 56 degrees of freedom
# Null hypothesis probability = 6.063462e-01
Photon flux (15-150 keV) in 64 sec: 7.52701E-02 ( -0.0262001 0.0264289 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.95203e-07 ( -6.81523e-08 7.42349e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.87118 ( -4.53272 -2.46264 )
beta : -9.37167 ( 9.37164 19.3491 )
Epeak [keV] : 25.8271 ( -7.7861 6.9336 )
Norm@50keV : 14.5471 ( -14.5402 27.8371 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.44 using 59 PHA bins.
# Reduced chi-squared = 0.9535 for 55 degrees of freedom
# Null hypothesis probability = 5.729287e-01
Photon flux (15-150 keV) in 64 sec: 7.52938E-02 ( ) 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) = 7.08e-08
S(50-100 keV) = 3.56e-08
T90 vs. Hardness ratio plot
T90 = 64 sec.
Hardness ratio (energy fluence ratio) = 0.502825
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.911955
Count Ratio (50-100 keV) / (15-25 keV) = -0.147443
Mask shadow pattern
IMX = -5.348354359546735E-01, IMY = 1.428585746816185E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
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 64.000000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.2679 -60.6108 3.4 47.1 33.9 -1.3553 -3.4 1.6 Cen X-3
186.6767 -62.7590 1.4 39.0 34.8 2.2695 8.1 0.9 GX 301-2
244.9722 -15.6372 0.8 34.3 153.5 3.5083 14.7 0.5 Sco X-1
255.8860 -37.6821 4.0 11.1 172.8 0.3661 2.9 10.8 4U 1700-377
256.3849 -36.4094 3.9 12.4 174.6 0.3872 2.9 2.6 GX 349+2
263.0856 -24.8725 4.2 24.6 -171.7 0.3767 2.7 8.7 GX 1+4
264.5288 -44.5947 0.0 7.4 -129.4 0.0842 0.7 12.6 4U 1735-44
268.3877 -1.5594 5.3 48.5 -170.9 0.7248 2.2 6.5 SW J1753.5-0127
270.2628 -25.2266 5.3 26.2 -156.9 0.3430 2.2 8.9 GX 5-1
270.2638 -25.8678 5.9 25.6 -156.4 0.3141 2.0 7.8 GRS 1758-258
274.0453 -14.0159 11.7 37.9 -158.2 0.2240 1.0 2.6 GX 17+2
275.9490 -30.5112 5.4 23.9 -140.5 0.3365 2.2 8.7 H1820-303
284.9213 -25.0684 0.0 32.9 -133.5 0.5055 2.5 10.8 HT1900.1-2455
262.8863 -33.7814 3.6 15.9 -165.7 0.4809 3.2 6.0 GX 354-0
75.0036 -77.7034 2.7 53.5 -8.2 1.3567 4.3 ------ UNKNOWN
354.9993 -83.2406 2.6 42.7 -17.8 0.9571 4.5 ------ UNKNOWN
293.1699 -37.4771 2.3 29.2 -106.6 1.0790 5.1 ------ UNKNOWN
285.3794 1.8187 3.0 56.8 -151.7 3.0732 3.8 ------ UNKNOWN
290.3183 -4.3021 2.7 53.3 -143.1 3.4481 4.2 ------ UNKNOWN
294.9437 -10.5192 2.1 50.3 -134.0 4.4694 5.4 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
949.500600 963.090000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
256.1734 -37.8921 8.0 37.2 98.8 -0.2130 -1.4 9.3 4U 1700-377
256.2487 -36.5151 6.4 37.4 101.1 0.2803 1.8 10.6 GX 349+2
263.1710 -24.8454 0.0 35.3 123.0 0.2268 1.9 10.7 GX 1+4
264.9407 -44.3132 0.0 30.4 87.7 -0.0812 -0.9 11.8 4U 1735-44
268.2764 -1.4143 3.3 46.0 156.4 0.5011 3.5 6.0 SW J1753.5-0127
270.2842 -25.0792 7.0 29.4 127.8 0.1260 1.6 0.0 GX 5-1
270.3025 -25.7431 2700.0 29.1 126.6 0.0002 0.0 0.0 GRS 1758-258
274.1553 -14.0847 4.6 32.8 149.4 0.2139 2.5 9.2 GX 17+2
275.7641 -30.4062 8.4 22.9 120.7 -0.0866 -1.4 8.7 H1820-303
284.9567 -25.1050 10.5 17.9 144.8 0.0604 1.1 11.9 HT1900.1-2455
288.8027 10.9495 2.9 47.3 -170.6 0.4173 4.1 0.3 GRS 1915+105
262.9966 -33.8454 1963.8 32.6 107.6 0.0005 0.0 0.7 GX 354-0
338.8800 -10.4980 2.6 40.8 -89.2 0.8778 4.5 ------ UNKNOWN
Plot creation:
Wed Mar 6 17:43:51 EST 2019