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
41.1876 +15.3392 0.0398 18.8 -171.6 0.0877 4.9 TRIG_00797070
------------------------------------------
Foreground time interval of the image:
0.000 2.048 (delta_t = 2.048 [sec])
Background time interval of the image:
-239.312 -13.312 (delta_t = 226.000 [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: 2.51126 ( -0.51727 0.65923 )
Norm@50keV : 1.58131E-03 ( -0.000804861 0.000869874 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 91.35 using 59 PHA bins.
# Reduced chi-squared = 1.603 for 57 degrees of freedom
# Null hypothesis probability = 2.615326e-03
Photon flux (15-150 keV) in 2.048 sec: 0.312945 ( -0.113775 0.113773 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.24336e-08 ( -1.32417e-08 1.48125e-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: -5.40866 ( 6.309 5.28132 )
Epeak [keV] : 31.3600 ( -4.70216 3.18707 )
Norm@50keV : 247.365 ( -242.413 601259 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 77.12 using 59 PHA bins.
# Reduced chi-squared = 1.377 for 56 degrees of freedom
# Null hypothesis probability = 3.216055e-02
Photon flux (15-150 keV) in 2.048 sec: 0.362732 ( -0.105548 0.107241 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.45711e-08 ( -1.06078e-08 1.09457e-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 : 4.83598 ( -3.77481 -4.83598 )
beta : -9.98394 ( 9.98394 19.9452 )
Epeak [keV] : 31.6844 ( -5.22453 5.50011 )
Norm@50keV : 97.5244 ( -27.1118 321.639 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 77.17 using 59 PHA bins.
# Reduced chi-squared = 1.403 for 55 degrees of freedom
# Null hypothesis probability = 2.596256e-02
Photon flux (15-150 keV) in 2.048 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.56483e-08 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.94812 (-1.53924 1.79064)
R^2/D10^2 : 0.485323 (-0.282709 0.659779)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 78.99 using 59 PHA bins.
# Reduced chi-squared = 1.386 for 57 degrees of freedom
# Null hypothesis probability = 2.855482e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.130e-08 6.844e-09
25- 50 1.955e-08 1.211e-08
50-150 5.025e-09 3.779e-09
15-150 3.588e-08 2.177e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 29.5418 (-11.508 22.1018)
Norm : 2.89638 (-1.23161 1.93804)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 86.13 using 59 PHA bins.
# Reduced chi-squared = 1.511 for 57 degrees of freedom
# Null hypothesis probability = 7.617557e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.198e-08 6.722e-09
25- 50 1.357e-08 8.512e-09
50-150 7.282e-09 6.497e-09
15-150 3.283e-08 2.109e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.94350 (-7.94107 -7.94107)
R1^2/D10^2 : 0.145006 (-0.145799 -0.145799)
kT2 [keV] : 7.95151 (-7.94207 -7.94207)
R2^2/D10^2 : 0.339999 (-0.340968 -0.340968)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 78.99 using 59 PHA bins.
# Reduced chi-squared = 1.436 for 55 degrees of freedom
# Null hypothesis probability = 1.869339e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.130e-08 4.425e-01
25- 50 1.955e-08 3.280e+00
50-150 5.027e-09 8.442e+01
15-150 3.587e-08 7.994e+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: 2.51126 ( -0.51727 0.65923 )
Norm@50keV : 1.58131E-03 ( -0.000804861 0.000869874 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 91.35 using 59 PHA bins.
# Reduced chi-squared = 1.603 for 57 degrees of freedom
# Null hypothesis probability = 2.615326e-03
Photon flux (15-150 keV) in 2.048 sec: 0.312945 ( -0.113775 0.113773 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.24336e-08 ( -1.32417e-08 1.48125e-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: -5.40866 ( 6.309 5.28132 )
Epeak [keV] : 31.3600 ( -4.70216 3.18707 )
Norm@50keV : 247.365 ( -242.413 601259 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 77.12 using 59 PHA bins.
# Reduced chi-squared = 1.377 for 56 degrees of freedom
# Null hypothesis probability = 3.216055e-02
Photon flux (15-150 keV) in 2.048 sec: 0.362732 ( -0.105548 0.107241 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.45711e-08 ( -1.06078e-08 1.09457e-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 : 4.83598 ( -3.77481 -4.83598 )
beta : -9.98394 ( 9.98394 19.9452 )
Epeak [keV] : 31.6844 ( -5.22453 5.50011 )
Norm@50keV : 97.5244 ( -27.1118 321.639 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 77.17 using 59 PHA bins.
# Reduced chi-squared = 1.403 for 55 degrees of freedom
# Null hypothesis probability = 2.596256e-02
Photon flux (15-150 keV) in 2.048 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.56483e-08 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.94812 (-1.53924 1.79064)
R^2/D10^2 : 0.485323 (-0.282709 0.659779)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 78.99 using 59 PHA bins.
# Reduced chi-squared = 1.386 for 57 degrees of freedom
# Null hypothesis probability = 2.855482e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.130e-08 6.390e-09
25- 50 1.955e-08 1.255e-08
50-150 5.025e-09 3.858e-09
15-150 3.588e-08 2.115e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 29.5418 (-11.508 22.1018)
Norm : 2.89638 (-1.23161 1.93804)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 86.13 using 59 PHA bins.
# Reduced chi-squared = 1.511 for 57 degrees of freedom
# Null hypothesis probability = 7.617557e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.198e-08 7.188e-09
25- 50 1.357e-08 8.156e-09
50-150 7.282e-09 5.885e-09
15-150 3.283e-08 1.908e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.94350 (-7.94107 -7.94107)
R1^2/D10^2 : 0.145006 (-0.145799 -0.145799)
kT2 [keV] : 7.95151 (-7.94207 -7.94207)
R2^2/D10^2 : 0.339999 (-0.340968 -0.340968)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 78.99 using 59 PHA bins.
# Reduced chi-squared = 1.436 for 55 degrees of freedom
# Null hypothesis probability = 1.869339e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.130e-08 3.795e-01
25- 50 1.955e-08 3.506e+00
50-150 5.027e-09 7.738e+01
15-150 3.587e-08 8.170e+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: 2.51126 ( -0.51727 0.65923 )
Norm@50keV : 1.58131E-03 ( -0.000804861 0.000869874 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 91.35 using 59 PHA bins.
# Reduced chi-squared = 1.603 for 57 degrees of freedom
# Null hypothesis probability = 2.615326e-03
Photon flux (15-150 keV) in 2.048 sec: 0.312945 ( -0.113775 0.113773 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.24336e-08 ( -1.32417e-08 1.48125e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -5.40866 ( 6.309 5.28132 )
Epeak [keV] : 31.3600 ( -4.70216 3.18707 )
Norm@50keV : 247.365 ( -242.413 601259 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 77.12 using 59 PHA bins.
# Reduced chi-squared = 1.377 for 56 degrees of freedom
# Null hypothesis probability = 3.216055e-02
Photon flux (15-150 keV) in 2.048 sec: 0.362732 ( -0.105548 0.107241 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.45711e-08 ( -1.06078e-08 1.09457e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.83598 ( -3.77481 -4.83598 )
beta : -9.98394 ( 9.98394 19.9452 )
Epeak [keV] : 31.6844 ( -5.22453 5.50011 )
Norm@50keV : 97.5244 ( -27.1118 321.639 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 77.17 using 59 PHA bins.
# Reduced chi-squared = 1.403 for 55 degrees of freedom
# Null hypothesis probability = 2.596256e-02
Photon flux (15-150 keV) in 2.048 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.56483e-08 ( 0 0 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 1.08e-08
S(50-100 keV) = 7.55e-09
T90 vs. Hardness ratio plot
T90 = 2.04800003767014 sec.
Hardness ratio (energy fluence ratio) = 0.699074
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.48034
Count Ratio (50-100 keV) / (15-25 keV) = -0.388903
Mask shadow pattern
IMX = -3.375656740044223E-01, IMY = 5.003069006801716E-02
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:
-239.312000 -13.312000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
83.6681 22.0415 0.9 36.6 97.9 10.1683 12.4 2.5 Crab
40.9301 61.4369 0.2 27.5 -4.1 19.6268 58.5 ------ UNKNOWN
30.9108 11.8438 2.4 25.2 -148.8 1.6220 4.9 ------ UNKNOWN
305.9175 75.1635 2.6 59.4 -17.8 9.0524 4.4 ------ UNKNOWN
20.7180 -18.7829 2.6 57.3 -154.0 11.1162 4.5 ------ UNKNOWN
9.1581 3.7156 3.0 44.5 -125.8 4.1368 3.9 592.6 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] [']
83.4671 22.0311 7.9 36.4 98.1 0.0661 1.5 9.3 Crab
107.7850 55.6575 2.1 48.0 42.2 0.4051 5.6 ------ UNKNOWN
42.9107 41.0935 1.9 7.2 -8.6 0.1106 6.1 ------ UNKNOWN
331.1804 85.2687 1.7 54.8 -6.2 0.3645 6.9 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
82.188600 374.188000
375.688000 380.978000
384.688000 385.078000
386.688000 387.058000
388.688000 394.728000
397.688000 405.798000
406.688000 815.388620
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
40.9485 61.4421 0.3 46.1 18.2 54.2496 39.1 ------ UNKNOWN
66.1643 -35.5074 3.2 56.1 173.9 12.1512 3.6 ------ UNKNOWN
15.0969 -21.0373 3.1 44.5 -125.8 9.0368 3.7 ------ UNKNOWN
7.1413 -5.8070 4.7 39.8 -101.2 7.9559 2.5 551.7 UNKNOWN
14.9096 -23.7139 3.8 46.7 -127.8 10.5171 3.0 ------ UNKNOWN
Plot creation:
Fri Dec 15 09:30:02 EST 2017