Estimated redshift from machine learning (Ukwatta et al. 2016) - may take a few minute to calcaulte
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
31.7140 -36.9310 0.0070 35.9837 117.7876 1.9039448 27.403 TRIG_00927825
Foreground time interval of the image:
-0.092 2.576 (delta_t = 2.668 [sec])
Background time interval of the image:
-239.556 -0.092 (delta_t = 239.464 [sec])
Lightcurves
Notes:
- 1) The mask-weighted light curves are using the flight position.
- 2) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 3) 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.
- 4) 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.
- 5) 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 0.064000
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 0.064000
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 0.064000
SN=5 or 10 sec. binning (whichever binning is satisfied first)
SN=5 or 10 sec. binning (T < 200 sec)
Quad-rate summed light curves (from T0-300s to T0+1000s)
Spectral Evolution
Spectra
Notes:
- 1) The fitting includes the systematic errors.
- 2) When the burst includes telescope slew time periods, the fitting uses an average response file made from multiple 5-s response files through out the slew time plus single time preiod for the non-slew times, and weighted by the total counts in the corresponding time period using addrmf. An average response file is needed becuase a spectral fit using 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.
Time averaged spectrum fit using the average DRM
Power-law model
Time interval is from -0.092 sec. to 2.576 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.35044 ( -0.0838171 0.0838034 )
Norm@50keV : 4.82799E-02 ( -0.00237783 0.0023776 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.43 using 59 PHA bins.
# Reduced chi-squared = 0.9900 for 57 degrees of freedom
# Null hypothesis probability = 4.963793e-01
Photon flux (15-150 keV) in 2.668 sec: 5.81694 ( -0.30015 0.30056 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.2581e-06 ( -6.69249e-08 6.70821e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.092 sec. to 2.576 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.04767 ( -0.341034 0.322737 )
Epeak [keV] : 174.070 ( -64.1602 -174.07 )
Norm@50keV : 6.68534E-02 ( -0.0188982 0.0284271 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.78 using 59 PHA bins.
# Reduced chi-squared = 0.9604 for 56 degrees of freedom
# Null hypothesis probability = 5.593723e-01
Photon flux (15-150 keV) in 2.668 sec: 5.74688 ( -0.30874 0.30901 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.24307e-06 ( -6.95646e-08 6.93571e-08 ) ergs/cm2
Band function
Time interval is from -0.092 sec. to 2.576 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : ( )
beta : ( )
Epeak [keV] : ( )
Norm@50keV : ( )
------------------------------------------------------------
Photon flux (15-150 keV) in 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] : 18.2341 ( )
R^2/D10^2 : 0.353334 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 142.20 using 59 PHA bins.
# Reduced chi-squared = 2.4947 for 57 degrees of freedom
# Null hypothesis probability = 3.133163e-09
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.249e-08 6.630e-09
25- 50 2.918e-07 1.828e-08
50-150 7.065e-07 5.323e-08
15-150 1.061e-06 6.216e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-10.9938 -200)
Norm : 24.3140 (-1.20575 1.20575)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.73 using 59 PHA bins.
# Reduced chi-squared = 1.276 for 57 degrees of freedom
# Null hypothesis probability = 7.817329e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.615e-07 9.298e-09
25- 50 3.107e-07 1.641e-08
50-150 6.814e-07 4.389e-08
15-150 1.154e-06 7.057e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.91650 (-1.15538 1.39629)
R1^2/D10^2 : 5.40871 (-2.46487 4.98896)
kT2 [keV] : 27.4539 (-3.28029 4.83001)
R2^2/D10^2 : 7.39073E-02 (-0.0323796 0.0433112)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.73 using 59 PHA bins.
# Reduced chi-squared = 0.9588 for 55 degrees of freedom
# Null hypothesis probability = 5.616844e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.340e-07 2.971e-08
25- 50 2.920e-07 3.930e-08
50-150 8.209e-07 1.178e-07
15-150 1.247e-06 1.583e-07
Peak spectrum fit
Power-law model
Time interval is from -0.092 sec. to 0.908 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.48139 ( -0.103489 0.104241 )
Norm@50keV : 6.28050E-02 ( -0.00414283 0.00413688 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 76.07 using 59 PHA bins.
# Reduced chi-squared = 1.335 for 57 degrees of freedom
# Null hypothesis probability = 4.651691e-02
Photon flux (15-150 keV) in 1 sec: 7.80215 ( -0.52434 0.52482 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.97737e-07 ( -4.22678e-08 4.24104e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.092 sec. to 0.908 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.806976 ( -0.469556 0.428726 )
Epeak [keV] : 93.6656 ( -19.2499 68.5451 )
Norm@50keV : 0.134295 ( -0.050397 0.089033 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.53 using 59 PHA bins.
# Reduced chi-squared = 1.224 for 56 degrees of freedom
# Null hypothesis probability = 1.214079e-01
Photon flux (15-150 keV) in 1 sec: 7.66691 ( -0.53231 0.53245 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.42492e-07 ( -4.90042e-08 4.23035e-08 ) ergs/cm2
Band function
Time interval is from -0.092 sec. to 0.908 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : ( )
beta : ( )
Epeak [keV] : ( )
Norm@50keV : ( )
------------------------------------------------------------
Photon flux (15-150 keV) in 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] : 16.5248 (-1.22928 1.31672)
R^2/D10^2 : 0.668141 (-0.158906 0.207793)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 111.77 using 59 PHA bins.
# Reduced chi-squared = 1.9609 for 57 degrees of freedom
# Null hypothesis probability = 2.005987e-05
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.744e-08 4.570e-09
25- 50 1.619e-07 1.415e-08
50-150 3.126e-07 3.705e-08
15-150 5.119e-07 4.025e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-32.503 -200)
Norm : 32.2766 (-2.10345 2.10345)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.75 using 59 PHA bins.
# Reduced chi-squared = 1.276 for 57 degrees of freedom
# Null hypothesis probability = 7.800574e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.066e-08 5.975e-09
25- 50 1.552e-07 1.195e-08
50-150 3.403e-07 6.930e-08
15-150 5.761e-07 7.755e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.23599 (-1.29884 1.62354)
R1^2/D10^2 : 10.1825 (-5.51584 14.0578)
kT2 [keV] : 22.7071 (-2.75292 4.04384)
R2^2/D10^2 : 0.180619 (-0.0858226 0.118741)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.63 using 59 PHA bins.
# Reduced chi-squared = 1.193 for 55 degrees of freedom
# Null hypothesis probability = 1.544801e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.248e-08 2.552e-08
25- 50 1.516e-07 3.349e-08
50-150 3.588e-07 8.005e-08
15-150 5.829e-07 1.253e-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: 1.35044 ( -0.0838171 0.0838034 )
Norm@50keV : 4.82799E-02 ( -0.00237783 0.0023776 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.43 using 59 PHA bins.
# Reduced chi-squared = 0.9900 for 57 degrees of freedom
# Null hypothesis probability = 4.963793e-01
Photon flux (15-150 keV) in 2.668 sec: 5.81686 ( -0.300137 0.300545 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.25794e-06 ( -6.69489e-08 6.70815e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.04767 ( -0.341034 0.322737 )
Epeak [keV] : 174.070 ( -64.1602 -174.07 )
Norm@50keV : 6.68534E-02 ( -0.0188982 0.0284271 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.78 using 59 PHA bins.
# Reduced chi-squared = 0.9604 for 56 degrees of freedom
# Null hypothesis probability = 5.593723e-01
Photon flux (15-150 keV) in 2.668 sec: 5.74635 ( -0.30866 0.30892 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.24358e-06 ( -6.96401e-08 6.93893e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : ( )
beta : ( )
Epeak [keV] : ( )
Norm@50keV : ( )
------------------------------------------------------------
Photon flux (15-150 keV) in 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) = 2.88e-07
S(50-100 keV) = 4.51e-07
T90 vs. Hardness ratio plot
T90 = 2.44399988651276 sec.
Hardness ratio (energy fluence ratio) = 1.56597
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.53708
Count Ratio (50-100 keV) / (15-25 keV) = 1.48019
Mask shadow pattern
IMX = -3.385085496979163E-01, IMY = -6.423743622980559E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.064000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.064000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.064000
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:
-239.556000 -0.092000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
264.8752 -44.4782 5.7 54.1 -28.6 -1.9628 -2.0 5.9 4U 1735-44
17.3306 -45.6105 2.9 26.4 98.3 1.2916 4.1 ------ UNKNOWN
69.1284 -50.4019 2.7 31.7 172.3 1.1838 4.3 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-0.092000 2.576000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
264.8434 -44.3077 7.2 54.2 -28.5 0.1448 1.6 9.6 4U 1735-44
35.7561 -32.2457 2.0 41.1 121.9 0.6299 5.9 ------ UNKNOWN
16.2014 -36.8165 2.5 35.2 96.4 0.3311 4.6 ------ UNKNOWN
31.7140 -36.9310 0.4 36.0 117.8 1.9040 27.4 ------ UNKNOWN
79.2593 -73.6460 2.6 17.9 -138.9 0.1146 4.5 ------ UNKNOWN
132.1851 -51.8128 2.9 48.5 -131.7 0.3750 4.1 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
65.344590 709.880400
720.444000 899.578300
900.444000 962.535600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
65.8926 -7.2718 3.3 43.0 175.5 4.1685 3.5 ------ UNKNOWN
323.3813 -48.6514 2.8 49.7 -5.8 4.8478 4.1 ------ UNKNOWN
300.5980 -60.6031 3.6 58.9 -24.4 12.9336 3.3 ------ UNKNOWN
54.6279 -72.1677 3.4 37.1 -70.8 4.8017 3.4 ------ UNKNOWN
Plot creation:
Wed Nov 27 16:30:20 EST 2019