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
155.6984 -68.4525 0.0618 12.3 126.3 9.1697 3.1 TRIG_00729600
------------------------------------------
Foreground time interval of the image:
-44.744 84.295 (delta_t = 129.039 [sec])
85.248 103.320 (delta_t = 18.072 [sec])
Background time interval of the image:
-49.351 -44.744 (delta_t = 4.607 [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 1.024000
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 1.024000
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 1.024000
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
Multiple GTIs in the spectrum
tstart tstop
-44.744000 84.295200
85.248000 103.320000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.43569 ( -0.114937 0.115556 )
Norm@50keV : 3.26731E-03 ( -0.00022131 0.000219629 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 85.23 using 59 PHA bins.
# Reduced chi-squared = 1.495 for 57 degrees of freedom
# Null hypothesis probability = 9.079146e-03
Photon flux (15-150 keV) in 147.1 sec: 0.401241 ( -0.0251711 0.0251723 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.61151e-06 ( -3.58003e-07 3.63133e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-44.744000 84.295200
85.248000 103.320000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.43647 ( -0.117582 0.113934 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 3.27288E-03 ( -0.000843414 0.0025138 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 85.24 using 59 PHA bins.
# Reduced chi-squared = 1.522 for 56 degrees of freedom
# Null hypothesis probability = 7.122683e-03
Photon flux (15-150 keV) in 147.1 sec: 0.401123 ( -0.025173 0.025143 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.60575e-06 ( -4.4305e-07 3.61734e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-44.744000 84.295200
85.248000 103.320000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 2.05630 ( -1.34977 -1.20853 )
beta : -1.78502 ( -0.296419 0.231662 )
Epeak [keV] : 36.4406 ( -8.32189 11.3172 )
Norm@50keV : 0.667299 ( -0.667123 37.0718 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.60 using 59 PHA bins.
# Reduced chi-squared = 1.338 for 55 degrees of freedom
# Null hypothesis probability = 4.770935e-02
Photon flux (15-150 keV) in 147.1 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] : 11.9362 ( )
R^2/D10^2 : 0.100966 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 125.10 using 59 PHA bins.
# Reduced chi-squared = 2.1948 for 57 degrees of freedom
# Null hypothesis probability = 5.186805e-07
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.473e-07 4.972e-08
25- 50 1.399e-06 9.525e-08
50-150 1.194e-06 1.901e-07
15-150 3.041e-06 2.457e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-37.5642 -200)
Norm : 1.63093 (-0.102389 0.102389)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 87.41 using 59 PHA bins.
# Reduced chi-squared = 1.533 for 57 degrees of freedom
# Null hypothesis probability = 5.912573e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.975e-07 4.310e-08
25- 50 1.149e-06 1.060e-07
50-150 2.521e-06 7.081e-07
15-150 4.268e-06 8.157e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.35703 (-0.705614 0.62124)
R1^2/D10^2 : 0.205654 (-0.0578648 0.0666709)
kT2 [keV] : 199.363 (-117.611 -199.363)
R2^2/D10^2 : 6.69213E-05 (-1.05533e-05 0.000204842)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.67 using 59 PHA bins.
# Reduced chi-squared = 0.8850 for 55 degrees of freedom
# Null hypothesis probability = 7.135497e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.381e-07 7.406e-08
25- 50 1.293e-06 1.817e-07
50-150 3.115e-06 1.472e-06
15-150 4.946e-06 1.706e-06
Peak spectrum fit
Power-law model
Time interval is from 99.020 sec. to 100.020 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.911623 ( -0.775653 0.634292 )
Norm@50keV : 1.31415E-02 ( -0.00389817 0.00376388 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.96 using 59 PHA bins.
# Reduced chi-squared = 0.9642 for 57 degrees of freedom
# Null hypothesis probability = 5.520539e-01
Photon flux (15-150 keV) in 1 sec: 1.50848 ( -0.435212 0.434219 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.46868e-07 ( -5.16885e-08 5.38352e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 99.020 sec. to 100.020 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.914437 ( -0.821106 0.579749 )
Epeak [keV] : 1.00000E+04 ( -10000 -10000 )
Norm@50keV : 1.32183E-02 ( -0.00377441 -0.0132223 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.98 using 59 PHA bins.
# Reduced chi-squared = 0.9818 for 56 degrees of freedom
# Null hypothesis probability = 5.134520e-01
Photon flux (15-150 keV) in 1 sec: 1.51311 ( -0.43601 0.4323 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.43574e-07 ( -4.82686e-08 5.231e-08 ) ergs/cm2
Band function
Time interval is from 99.020 sec. to 100.020 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.854845 ( 0.854762 0.854762 )
beta : -0.923581 ( 0.922843 0.787563 )
Epeak [keV] : 17.0430 ( -16.9042 -16.9042 )
Norm@50keV : 1.84306E-02 ( -0.00893791 0.256573 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.96 using 59 PHA bins.
# Reduced chi-squared = 0.9993 for 55 degrees of freedom
# Null hypothesis probability = 4.761657e-01
Photon flux (15-150 keV) in 1 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] : 43.6029 (-27.0461 -43.8764)
R^2/D10^2 : 8.17305E-03 (-0.00799212 0.103263)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.19 using 59 PHA bins.
# Reduced chi-squared = 1.073 for 57 degrees of freedom
# Null hypothesis probability = 3.281304e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.882e-09 1.154e-09
25- 50 1.315e-08 7.760e-09
50-150 1.392e-07 8.015e-08
15-150 1.542e-07 8.930e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-107.2 -199.363)
Norm : 5.78945 (-1.74386 1.74503)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.35 using 59 PHA bins.
# Reduced chi-squared = 1.024 for 57 degrees of freedom
# Null hypothesis probability = 4.255846e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.442e-08 9.085e-09
25- 50 2.773e-08 1.761e-08
50-150 6.082e-08 3.776e-08
15-150 1.030e-07 6.320e-08
Double BB
R1^2/D10^2 : 2.16140 (-1.89549 23.0223)
kT2 [keV] : 199.363 (-160.482 -199.363)
R2^2/D10^2 : 5.20823E-04 (-0.000193832 0.00260218)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.54 using 59 PHA bins.
#Fit statistic : Chi-Squared = 50.17 using 59 PHA bins.
#Fit statistic : Chi-Squared = 50.15 using 59 PHA bins.
# Reduced chi-squared = 0.9189 for 55 degrees of freedom
# Reduced chi-squared = 0.9121 for 55 degrees of freedom
# Reduced chi-squared = 0.9118 for 55 degrees of freedom
# Null hypothesis probability = 6.455169e-01
# Null hypothesis probability = 6.594676e-01
# Null hypothesis probability = 6.600195e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.340e-08 8.270e-09
25- 50 2.347e-08 1.395e-08
50-150 1.376e-07 1.083e-07
15-150 1.745e-07 1.081e-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: 1.43569 ( -0.114937 0.115556 )
Norm@50keV : 3.26731E-03 ( -0.00022131 0.000219629 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 85.23 using 59 PHA bins.
# Reduced chi-squared = 1.495 for 57 degrees of freedom
# Null hypothesis probability = 9.079146e-03
Photon flux (15-150 keV) in 147.1 sec: 0.401241 ( -0.0251711 0.0251723 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.61151e-06 ( -3.58003e-07 3.63133e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.43647 ( -0.117582 0.113934 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 3.27288E-03 ( -0.000843414 0.0025138 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 85.24 using 59 PHA bins.
# Reduced chi-squared = 1.522 for 56 degrees of freedom
# Null hypothesis probability = 7.122683e-03
Photon flux (15-150 keV) in 147.1 sec: 0.401123 ( -0.025173 0.025143 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.60575e-06 ( -4.4305e-07 3.61734e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 2.05630 ( -1.34977 -1.20853 )
beta : -1.78502 ( -0.296419 0.231662 )
Epeak [keV] : 36.4406 ( -8.32189 11.3172 )
Norm@50keV : 0.667299 ( -0.667123 37.0806 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.60 using 59 PHA bins.
# Reduced chi-squared = 1.338 for 55 degrees of freedom
# Null hypothesis probability = 4.770935e-02
Photon flux (15-150 keV) in 147.1 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) = 1.10e-06
S(50-100 keV) = 1.63e-06
T90 vs. Hardness ratio plot
T90 = 118.6400000453 sec.
Hardness ratio (energy fluence ratio) = 1.48182
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.77614
Count Ratio (50-100 keV) / (15-25 keV) = 0.916316
Mask shadow pattern
IMX = -1.294029683721854E-01, IMY = -1.758643958938919E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
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:
-49.351400 -44.744000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.3324 -40.4672 5.4 41.9 112.8 -0.3638 -2.2 10.4 Vela X-1
170.3877 -60.7925 31.8 19.2 153.1 -0.0130 -0.4 10.4 Cen X-3
186.8470 -62.6986 8.8 17.8 178.1 0.0469 1.3 6.8 GX 301-2
168.6683 -34.2729 2.2 45.8 151.9 0.5662 5.2 ------ UNKNOWN
103.9711 -62.1808 2.2 25.8 68.3 0.2466 5.2 ------ UNKNOWN
191.7127 -28.2035 2.7 52.4 177.8 0.5270 4.3 ------ UNKNOWN
321.0114 -58.9464 2.1 39.9 -48.5 0.3615 5.5 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-44.744000 84.295200
85.248000 103.320000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.6816 -40.6584 7.7 41.7 113.1 16.5788 1.5 9.3 Vela X-1
170.4631 -60.4930 3.5 19.5 153.2 8.8007 3.3 8.9 Cen X-3
186.7462 -62.8343 11.1 17.6 178.0 2.7816 1.0 4.6 GX 301-2
244.6343 -56.6188 3.2 31.6 -116.0 15.2169 3.6 ------ UNKNOWN
308.4976 -52.9087 3.3 44.7 -60.2 45.0896 3.5 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
Plot creation:
Wed Jan 4 05:26:30 EST 2017