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
202.4822 -22.5991 0.0393 30.3 -163.3 0.0889 4.9 TRIG_00989458
------------------------------------------
Foreground time interval of the image:
0.000 2.048 (delta_t = 2.048 [sec])
Background time interval of the image:
-239.776 -11.776 (delta_t = 228.000 [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
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 2.048000
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 2.048000
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 2.048000
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 2.048 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.08962 ( -0.558431 0.627381 )
Norm@50keV : 2.03868E-03 ( -0.000988451 0.000919771 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 76.49 using 59 PHA bins.
# Reduced chi-squared = 1.342 for 57 degrees of freedom
# Null hypothesis probability = 4.344987e-02
Photon flux (15-150 keV) in 2.048 sec: 0.319016 ( -0.113731 0.113727 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.84924e-08 ( -1.55795e-08 1.70288e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 2.048 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -4.10031 ( 4.57768 4.64169 )
Epeak [keV] : 33.1317 ( -6.269 8.23265 )
Norm@50keV : 21.4059 ( -21.0537 519134 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.90 using 59 PHA bins.
# Reduced chi-squared = 1.230 for 56 degrees of freedom
# Null hypothesis probability = 1.154310e-01
Photon flux (15-150 keV) in 2.048 sec: 0.313569 ( -0.101642 0.104853 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.12476e-08 ( -1.02902e-08 1.11553e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 2.048 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.48828 ( -4.54404 -4.48828 )
beta : -9.33928 ( 9.33928 19.2996 )
Epeak [keV] : 33.1739 ( -6.40772 7.33899 )
Norm@50keV : 37.3047 ( -11.4222 616.148 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.93 using 59 PHA bins.
# Reduced chi-squared = 1.253 for 55 degrees of freedom
# Null hypothesis probability = 9.812101e-02
Photon flux (15-150 keV) in 2.048 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] : 8.51595 (-1.9333 2.50035)
R^2/D10^2 : 0.326207 (-0.32618 0.573387)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.73 using 59 PHA bins.
# Reduced chi-squared = 1.223 for 57 degrees of freedom
# Null hypothesis probability = 1.200489e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.141e-09 5.655e-09
25- 50 1.778e-08 1.160e-08
50-150 5.712e-09 4.433e-09
15-150 3.263e-08 2.051e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 42.3878 (-21.1419 73.3193)
Norm : 2.09425 (-0.93456 1.57478)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.11 using 59 PHA bins.
# Reduced chi-squared = 1.300 for 57 degrees of freedom
# Null hypothesis probability = 6.343943e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.003e-08 6.193e-09
25- 50 1.353e-08 8.330e-09
50-150 1.114e-08 9.297e-09
15-150 3.470e-08 2.359e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.54020 (-8.52783 -8.52783)
R1^2/D10^2 : 0.109447 (-0.109151 -0.109151)
kT2 [keV] : 8.49469 (-8.51293 -8.51293)
R2^2/D10^2 : 0.217675 (-0.217231 -0.217231)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.73 using 59 PHA bins.
# Reduced chi-squared = 1.268 for 55 degrees of freedom
# Null hypothesis probability = 8.727355e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.150e-09 1.070e-01
25- 50 1.778e-08 9.456e-01
50-150 5.698e-09 2.243e+01
15-150 3.263e-08 2.473e+01
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 2.048 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.08962 ( -0.558431 0.627381 )
Norm@50keV : 2.03868E-03 ( -0.000988451 0.000919771 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 76.49 using 59 PHA bins.
# Reduced chi-squared = 1.342 for 57 degrees of freedom
# Null hypothesis probability = 4.344987e-02
Photon flux (15-150 keV) in 2.048 sec: 0.319016 ( -0.113731 0.113727 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.84924e-08 ( -1.55795e-08 1.70288e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 2.048 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -4.10031 ( 4.57768 4.64169 )
Epeak [keV] : 33.1317 ( -6.269 8.23265 )
Norm@50keV : 21.4059 ( -21.0537 519134 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.90 using 59 PHA bins.
# Reduced chi-squared = 1.230 for 56 degrees of freedom
# Null hypothesis probability = 1.154310e-01
Photon flux (15-150 keV) in 2.048 sec: 0.313569 ( -0.101642 0.104853 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.12476e-08 ( -1.02902e-08 1.11553e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 2.048 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.48828 ( -4.54404 -4.48828 )
beta : -9.33928 ( 9.33928 19.2996 )
Epeak [keV] : 33.1739 ( -6.40772 7.33899 )
Norm@50keV : 37.3047 ( -11.4222 616.148 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.93 using 59 PHA bins.
# Reduced chi-squared = 1.253 for 55 degrees of freedom
# Null hypothesis probability = 9.812101e-02
Photon flux (15-150 keV) in 2.048 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] : 8.51595 (-1.9333 2.50035)
R^2/D10^2 : 0.326207 (-0.32618 0.573387)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.73 using 59 PHA bins.
# Reduced chi-squared = 1.223 for 57 degrees of freedom
# Null hypothesis probability = 1.200489e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.141e-09 5.557e-09
25- 50 1.778e-08 1.141e-08
50-150 5.712e-09 4.392e-09
15-150 3.263e-08 2.070e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 42.3878 (-21.1419 73.3193)
Norm : 2.09425 (-0.93456 1.57478)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.11 using 59 PHA bins.
# Reduced chi-squared = 1.300 for 57 degrees of freedom
# Null hypothesis probability = 6.343943e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.003e-08 6.332e-09
25- 50 1.353e-08 8.348e-09
50-150 1.114e-08 9.773e-09
15-150 3.470e-08 2.245e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.54020 (-8.52783 -8.52783)
R1^2/D10^2 : 0.109447 (-0.109151 -0.109151)
kT2 [keV] : 8.49469 (-8.51293 -8.51293)
R2^2/D10^2 : 0.217675 (-0.217231 -0.217231)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.73 using 59 PHA bins.
# Reduced chi-squared = 1.268 for 55 degrees of freedom
# Null hypothesis probability = 8.727355e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.150e-09 1.169e-01
25- 50 1.778e-08 9.734e-01
50-150 5.698e-09 2.273e+01
15-150 3.263e-08 2.612e+01
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: 2.08962 ( -0.558431 0.627381 )
Norm@50keV : 2.03868E-03 ( -0.000988451 0.000919771 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 76.49 using 59 PHA bins.
# Reduced chi-squared = 1.342 for 57 degrees of freedom
# Null hypothesis probability = 4.344987e-02
Photon flux (15-150 keV) in 2.048 sec: 0.319016 ( -0.113731 0.113727 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.84924e-08 ( -1.55795e-08 1.70288e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -4.10031 ( 4.57768 4.64169 )
Epeak [keV] : 33.1317 ( -6.269 8.23265 )
Norm@50keV : 21.4059 ( -21.0537 519134 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.90 using 59 PHA bins.
# Reduced chi-squared = 1.230 for 56 degrees of freedom
# Null hypothesis probability = 1.154310e-01
Photon flux (15-150 keV) in 2.048 sec: 0.313569 ( -0.101642 0.104853 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.12476e-08 ( -1.02902e-08 1.11553e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.48828 ( -4.54404 -4.48828 )
beta : -9.33928 ( 9.33928 19.2996 )
Epeak [keV] : 33.1739 ( -6.40772 7.33899 )
Norm@50keV : 37.3047 ( -11.4222 616.148 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.93 using 59 PHA bins.
# Reduced chi-squared = 1.253 for 55 degrees of freedom
# Null hypothesis probability = 9.812101e-02
Photon flux (15-150 keV) in 2.048 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) = 1.19e-08
S(50-100 keV) = 1.11e-08
T90 vs. Hardness ratio plot
T90 = 2.04799997806549 sec.
Hardness ratio (energy fluence ratio) = 0.932773
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.24519
Count Ratio (50-100 keV) / (15-25 keV) = 0.0321378
Mask shadow pattern
IMX = -5.601406343818897E-01, IMY = 1.678484570837852E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 2.048000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 2.048000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 2.048000
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:
-239.776000 -11.776000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9720 -15.6455 0.6 26.8 103.8 7.0055 20.1 0.5 Sco X-1
254.4345 35.2801 3.1 45.7 13.1 -1.5625 -3.8 3.9 Her X-1
268.1949 31.1720 2.1 52.8 26.3 6.0145 5.5 ------ UNKNOWN
230.6056 -41.5861 3.1 42.3 148.3 2.3627 3.8 ------ UNKNOWN
189.7196 -45.3993 2.4 54.2 -174.9 4.2176 4.8 ------ UNKNOWN
186.5421 -15.8205 2.6 39.4 -139.0 1.8068 4.4 ------ UNKNOWN
175.0284 -14.7970 2.8 49.8 -133.0 5.4458 4.1 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
0.000000 2.048000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.7992 -15.7239 8.0 26.7 104.2 0.0319 1.4 11.6 Sco X-1
254.5729 35.2925 5.9 45.8 13.2 0.0652 2.0 6.4 Her X-1
179.5393 -1.4597 2.7 43.5 -115.6 0.2578 4.3 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
79.424600 379.254000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.3517 -60.4726 9.4 44.0 174.7 -0.6936 -1.2 9.1 Cen X-3
186.4711 -62.8062 7.4 41.7 163.5 0.8581 1.5 5.5 GX 301-2
244.9824 -15.6596 1.6 40.6 60.5 7.1173 7.1 1.2 Sco X-1
223.7389 -70.6455 2.5 49.6 143.5 7.1414 4.7 ------ UNKNOWN
Plot creation:
Mon Aug 17 18:45:46 EDT 2020