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
293.7302 +21.8871 0.0017 25.5 23.1 29.5156 109.5 TRIG_00701590
------------------------------------------
Foreground time interval of the image:
-0.220 0.668 (delta_t = 0.888 [sec])
Background time interval of the image:
-185.159 -143.100 (delta_t = 42.059 [sec])
-142.360 -0.220 (delta_t = 142.140 [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
8 ms binning
From T100_start-3 s to T100_start+3 s
2 ms binning
From T100_start-1 s to T100_start+1 s
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 -0.220 sec. to 0.668 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.09617 ( )
Norm@50keV : 1.26054 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 2024.57 using 59 PHA bins.
# Reduced chi-squared = 35.5187 for 57 degrees of freedom
# Null hypothesis probability = 0.000000e+00
Photon flux (15-150 keV) in 0.888 sec: 372.120 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.408e-05 ( 0 0 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.220 sec. to 0.668 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.171094 ( -0.146257 0.142603 )
Epeak [keV] : 32.4553 ( -1.07011 1.00802 )
Norm@50keV : 34.1964 ( -4.88587 5.85479 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.44 using 59 PHA bins.
# Reduced chi-squared = 1.079 for 56 degrees of freedom
# Null hypothesis probability = 3.185512e-01
Photon flux (15-150 keV) in 0.888 sec: 286.364 ( -7.64 7.715 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.2807e-05 ( 0 0 ) ergs/cm2
Band function
Time interval is from -0.220 sec. to 0.668 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.125366 ( -0.236355 0.235409 )
beta : -5.16722 ( -0.502269 0.28662 )
Epeak [keV] : 33.5365 ( -1.13906 0.985975 )
Norm@50keV : 49.4527 ( -11.5769 16.6583 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.62 using 59 PHA bins.
# Reduced chi-squared = 0.8839 for 55 degrees of freedom
# Null hypothesis probability = 7.155482e-01
Photon flux (15-150 keV) in 0.888 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] : 10.2689 ( )
R^2/D10^2 : 116.507 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 407.73 using 59 PHA bins.
# Reduced chi-squared = 7.1531 for 57 degrees of freedom
# Null hypothesis probability = 1.880482e-54
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.241e-06 6.172e-08
25- 50 5.782e-06 1.150e-07
50-150 3.257e-06 5.861e-08
15-150 1.128e-05 1.909e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 30.4502 ( )
Norm : 2719.14 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 290.10 using 59 PHA bins.
# Reduced chi-squared = 5.0895 for 57 degrees of freedom
# Null hypothesis probability = 6.009499e-33
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.952e-06 1.083e-07
25- 50 5.704e-06 9.946e-08
50-150 3.185e-06 5.506e-08
15-150 1.384e-05 2.264e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.59201 (-0.430038 0.403849)
R1^2/D10^2 : 309.243 (-43.282 57.1769)
kT2 [keV] : 14.2373 (-0.790781 0.985929)
R2^2/D10^2 : 11.7488 (-4.52179 6.11535)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.50 using 59 PHA bins.
# Reduced chi-squared = 0.7364 for 55 degrees of freedom
# Null hypothesis probability = 9.280602e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.191e-06 1.696e-07
25- 50 6.065e-06 1.736e-07
50-150 3.235e-06 1.661e-07
15-150 1.249e-05 4.085e-07
Peak spectrum fit
Power-law model
Time interval is from -0.274 sec. to 0.726 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.08950 ( )
Norm@50keV : 1.12377 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 1991.86 using 59 PHA bins.
# Reduced chi-squared = 34.9448 for 57 degrees of freedom
# Null hypothesis probability = 0.000000e+00
Photon flux (15-150 keV) in 1 sec: 330.102 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.40892e-05 ( 0 0 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.274 sec. to 0.726 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.172957 ( -0.146835 0.143165 )
Epeak [keV] : 32.4472 ( -1.07318 1.01044 )
Norm@50keV : 30.2977 ( -4.34939 5.21607 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.68 using 59 PHA bins.
# Reduced chi-squared = 1.066 for 56 degrees of freedom
# Null hypothesis probability = 3.433840e-01
Photon flux (15-150 keV) in 1 sec: 254.332 ( -6.789 6.857 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.28086e-05 ( 0 0 ) ergs/cm2
Band function
Time interval is from -0.274 sec. to 0.726 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 7.18520E-02 ( -0.225159 0.261152 )
beta : -5.20230 ( -0.467052 0.292834 )
Epeak [keV] : 33.3183 ( -1.0883 1.01934 )
Norm@50keV : 41.2177 ( -10.1454 15.5215 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.15 using 59 PHA bins.
# Reduced chi-squared = 0.8572 for 55 degrees of freedom
# Null hypothesis probability = 7.653048e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.27123e-05 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.2637 ( )
R^2/D10^2 : 103.704 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 405.10 using 59 PHA bins.
# Reduced chi-squared = 7.1071 for 57 degrees of freedom
# Null hypothesis probability = 5.849247e-54
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.244e-06 6.300e-08
25- 50 5.785e-06 1.100e-07
50-150 3.254e-06 6.100e-08
15-150 1.128e-05 1.850e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 30.4966 ( )
Norm : 2409.96 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 286.49 using 59 PHA bins.
# Reduced chi-squared = 5.0261 for 57 degrees of freedom
# Null hypothesis probability = 2.601527e-32
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.946e-06 1.190e-07
25- 50 5.703e-06 9.900e-08
50-150 3.191e-06 5.600e-08
15-150 1.384e-05 2.200e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.59992 (-0.431418 0.404823)
R1^2/D10^2 : 274.149 (-38.385 50.7176)
kT2 [keV] : 14.2695 (-0.803923 1.00549)
R2^2/D10^2 : 10.2833 (-4.00043 5.43628)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.57 using 59 PHA bins.
# Reduced chi-squared = 0.7195 for 55 degrees of freedom
# Null hypothesis probability = 9.419201e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.190e-06 1.435e-07
25- 50 6.065e-06 1.660e-07
50-150 3.236e-06 1.845e-07
15-150 1.249e-05 3.950e-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: 3.09617 ( )
Norm@50keV : 1.26054 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 2024.57 using 59 PHA bins.
# Reduced chi-squared = 35.5187 for 57 degrees of freedom
# Null hypothesis probability = 0.000000e+00
Photon flux (15-150 keV) in 0.888 sec: 372.120 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.408e-05 ( 0 0 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.171094 ( -0.146257 0.142603 )
Epeak [keV] : 32.4553 ( -1.07011 1.00802 )
Norm@50keV : 34.1964 ( -4.88587 5.85479 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.44 using 59 PHA bins.
# Reduced chi-squared = 1.079 for 56 degrees of freedom
# Null hypothesis probability = 3.185512e-01
Photon flux (15-150 keV) in 0.888 sec: 286.364 ( -7.64 7.715 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.2807e-05 ( 0 0 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.125366 ( -0.236355 0.235409 )
beta : -5.16722 ( -0.502269 0.28662 )
Epeak [keV] : 33.5365 ( -1.13906 0.985975 )
Norm@50keV : 49.4527 ( -11.5769 16.6583 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.62 using 59 PHA bins.
# Reduced chi-squared = 0.8839 for 55 degrees of freedom
# Null hypothesis probability = 7.155482e-01
Photon flux (15-150 keV) in 0.888 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) = 4.65e-06
S(50-100 keV) = 2.18e-06
T90 vs. Hardness ratio plot
T90 = 0.679999947547913 sec.
Hardness ratio (energy fluence ratio) = 0.468817
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.26792
Count Ratio (50-100 keV) / (15-25 keV) = 0.349878
Mask shadow pattern
IMX = 4.390105012517670E-01, IMY = -1.869986706501898E-01
TIME vs. PHA plot around the trigger time
TIME vs. DetID plot around the trigger time
100 us light curve (15-350 keV)
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:
-185.159400 -143.100000
-142.360000 -0.220000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.3402 35.4675 14.0 11.7 -139.7 0.1324 0.8 9.4 Her X-1
268.2534 -1.4923 429.5 31.7 97.7 -0.0090 -0.0 7.3 SW J1753.5-0127
288.6913 10.9931 3.4 28.0 49.2 0.7832 3.4 6.9 GRS 1915+105
299.5960 35.1869 0.4 27.9 -8.5 5.6638 31.7 0.9 Cyg X-1
308.1101 40.9357 1.6 34.9 -18.9 1.5128 7.4 1.0 Cyg X-3
326.1572 38.4416 7.2 48.9 -16.1 0.5866 1.6 7.2 Cyg X-2
256.9186 -4.5216 2.9 36.0 117.4 1.5224 4.0 ------ UNKNOWN
321.4011 20.0890 3.1 50.0 8.7 1.6274 3.7 ------ UNKNOWN
305.9743 58.6857 2.7 38.9 -48.1 1.2661 4.3 ------ UNKNOWN
330.8671 52.8576 3.0 51.0 -35.2 2.2523 3.8 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-0.220000 0.668000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.6817 35.2450 6.5 11.4 -140.1 -0.4174 -1.8 12.4 Her X-1
268.5016 -1.4964 18.9 31.8 97.2 -0.2759 -0.6 8.4 SW J1753.5-0127
288.8898 10.8482 3.5 28.2 49.1 1.0367 3.3 7.9 GRS 1915+105
299.4840 35.2198 6.1 27.8 -8.6 -0.5046 -1.9 5.3 Cyg X-1
308.0609 40.9849 5.7 34.9 -19.0 0.5390 2.0 3.0 Cyg X-3
326.0125 38.4080 8.2 48.8 -16.0 -0.6833 -1.4 9.1 Cyg X-2
293.7302 21.8871 0.1 25.5 23.1 29.5138 109.5 ------ UNKNOWN
328.2562 18.5651 1.9 56.5 7.2 7.1944 5.9 ------ UNKNOWN
259.5994 48.0454 2.9 18.7 -94.8 1.0479 3.9 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
92.440600 621.340000
622.640000 962.734200
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.3023 35.4639 4.1 36.9 -171.5 1.9038 2.8 10.5 Her X-1
268.2458 -1.4171 71.5 34.1 118.2 -0.2072 -0.2 7.6 SW J1753.5-0127
274.1304 -14.0345 5.9 40.7 98.0 4.6416 1.9 7.3 GX 17+2
288.8117 10.9585 1.2 11.9 92.2 5.1600 9.5 1.1 GRS 1915+105
299.5839 35.1929 0.3 14.3 -92.2 25.0645 40.7 0.6 Cyg X-1
308.0736 40.9430 1.3 22.6 -82.8 6.0019 8.9 1.8 Cyg X-3
326.0583 38.2103 5.5 32.1 -59.8 1.9980 2.1 8.6 Cyg X-2
275.6229 -14.6875 2.5 40.7 95.6 10.3657 4.6 ------ UNKNOWN
240.8115 10.4330 2.9 51.9 154.2 11.6387 4.0 ------ UNKNOWN
318.8479 -3.2351 2.2 35.1 20.7 3.8220 5.3 ------ UNKNOWN
333.1417 -6.5105 3.3 47.9 9.9 3.9150 3.4 ------ UNKNOWN
Plot creation:
Mon Jun 27 20:40:01 EDT 2016