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
122.6176 -21.9010 0.0211 4.9926 -62.4655 0.7312292 9.145 TRIG_01165354
Foreground time interval of the image:
-2.252 24.492 (delta_t = 26.744 [sec])
Background time interval of the image:
-239.624 -2.252 (delta_t = 237.372 [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
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)
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 -2.252 sec. to 24.492 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.69125 ( -0.260047 0.27396 )
Norm@50keV : 1.86039E-03 ( -0.000318406 0.000310013 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 43.53 using 59 bins.
Reduced chi-squared = 0.763684
# Null hypothesis probability of 9.05e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 26.74 sec: 0.246340 ( -0.036356 0.036363 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.6099e-07 ( -8.18656e-08 8.39663e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -2.252 sec. to 24.492 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.25654 ( -1.29018 0.761451 )
Epeak [keV] : 76.7188 ( -54.4419 -76.7188 )
Norm@50keV : 3.23539E-03 ( -0.00323539 0.0137951 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 43.01 using 59 bins.
Reduced chi-squared = 0.768036
# Null hypothesis probability of 8.99e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 26.74 sec: 0.242321 ( -0.037623 0.037526 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.41255e-07 ( -9.27966e-08 9.48513e-08 ) ergs/cm2
Band function
Time interval is from -2.252 sec. to 24.492 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] : 11.5390 (-1.94576 2.47198)
R^2/D10^2 : 6.95278E-02 (-0.0352786 0.0669079)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 51.66 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 6.75e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.213e-08 1.364e-08
25- 50 1.565e-07 3.560e-08
50-150 1.220e-07 4.040e-08
15-150 3.307e-07 7.387e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 122.150 (-54.1171 -123.017)
Norm : 1.05263 (-0.179427 0.227803)
------------------------------------------------------------
#Fit statistic : Chi-Squared 43.01 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 9.15e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.326e-08 2.776e-08
25- 50 1.315e-07 4.853e-08
50-150 2.367e-07 1.493e-07
15-150 4.414e-07 2.100e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.68030 (-2.92344 2.73533)
R1^2/D10^2 : 0.224679 (-0.140252 0.251555)
kT2 [keV] : 28.4939 (-12.6573 117.237)
R2^2/D10^2 : 1.79348E-03 (-0.00171571 0.0156739)
------------------------------------------------------------
#Fit statistic : Chi-Squared 42.61 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.89e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.835e-08 3.828e-08
25- 50 1.390e-07 7.351e-08
50-150 2.447e-07 1.411e-07
15-150 4.520e-07 2.296e-07
Peak spectrum fit
Power-law model
Time interval is from 10.624 sec. to 11.624 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.01489 ( -0.54831 0.697753 )
Norm@50keV : 3.87879E-03 ( -0.00175077 0.0016511 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 57.98 using 59 bins.
Reduced chi-squared = 1.01719
# Null hypothesis probability of 4.39e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 0.585885 ( -0.189457 0.189584 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.58088e-08 ( -1.41856e-08 1.53335e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 10.624 sec. to 11.624 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.688297 ( 0.739872 2.96243 )
Epeak [keV] : 40.4502 ( -40.4248 -40.4248 )
Norm@50keV : 0.145444 ( -0.174985 45727.6 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 56.06 using 59 bins.
Reduced chi-squared = 1.00107
# Null hypothesis probability of 4.73e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 0.548718 ( -0.199061 0.19465 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from 10.624 sec. to 11.624 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] : 10.3348 (-2.62634 3.42031)
R^2/D10^2 : 0.268651 (-0.268651 0.519702)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 55.95 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 5.14e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.905e-09 3.587e-09
25- 50 1.537e-08 9.245e-09
50-150 8.817e-09 6.937e-09
15-150 3.009e-08 1.906e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 60.5133 (-33.5324 -60.4744)
Norm : 3.13138 (-1.23846 2.0842)
------------------------------------------------------------
#Fit statistic : Chi-Squared 57.04 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 4.74e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.881e-09 5.060e-09
25- 50 1.203e-08 7.608e-09
50-150 1.378e-08 1.128e-08
15-150 3.369e-08 2.183e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.05506 (-1.04464 2.49192)
R1^2/D10^2 : 2.30839E+05 (-290006 -290021)
kT2 [keV] : 11.1043 (-2.83246 3.99772)
R2^2/D10^2 : 0.192942 (-0.136896 0.153029)
------------------------------------------------------------
#Fit statistic : Chi-Squared 52.94 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 5.54e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.126e-09 3.323e-09
25- 50 1.425e-08 8.915e-09
50-150 9.999e-09 7.125e-09
15-150 3.038e-08 1.855e-08
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: 1.69125 ( -0.260047 0.27396 )
Norm@50keV : 1.86039E-03 ( -0.000318406 0.000310013 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 43.53 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 9.05e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 26.74 sec: 0.246330 ( -0.0363541 0.0363605 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.6092e-07 ( -8.18263e-08 8.39935e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.25654 ( -1.29018 0.761454 )
Epeak [keV] : 76.7186 ( -59.8645 -76.7188 )
Norm@50keV : 3.23539E-03 ( -0.00323539 0.0137951 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 43.01 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.99e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 26.74 sec: 0.242284 ( -0.037614 0.03693 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.41397e-07 ( -9.27958e-08 9.49618e-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) = 1.24e-07
S(50-100 keV) = 1.54e-07
T90 vs. Hardness ratio plot
T90 = 23.6039999723434 sec.
Hardness ratio (energy fluence ratio) = 1.24194
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.61504
Count Ratio (50-100 keV) / (15-25 keV) = 0.877064
Mask shadow pattern
IMX = 4.038392364169518E-02, IMY = 7.746302932783052E-02
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:
-239.624000 -2.252000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.4070 -40.5572 2.8 17.1 147.7 1.9949 4.1 5.5 Vela X-1
170.3692 -60.6447 9.1 46.3 142.4 2.8849 1.3 2.0 Cen X-3
161.6209 -23.3903 2.4 31.6 84.7 3.6284 4.7 ------ UNKNOWN
152.1359 7.9970 2.5 41.1 30.1 2.5551 4.6 ------ UNKNOWN
129.1225 -7.0557 3.4 18.1 -2.7 1.4507 3.4 ------ UNKNOWN
85.0104 -21.4931 2.9 38.5 -103.5 5.7511 3.9 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-2.252000 24.492000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.5361 -40.7035 6.3 17.3 147.6 -0.1606 -1.8 8.9 Vela X-1
170.4839 -60.6453 4.0 46.4 142.3 0.8873 2.9 5.1 Cen X-3
142.7112 18.9957 2.2 46.6 11.0 0.8653 5.2 ------ UNKNOWN
135.8760 -2.2596 2.2 24.3 12.4 0.4567 5.2 ------ UNKNOWN
129.0046 -33.2827 2.3 8.5 158.1 0.4140 5.1 ------ UNKNOWN
122.6176 -21.9011 1.3 5.0 -62.5 0.7311 9.1 ------ UNKNOWN
112.3730 12.8078 2.9 40.4 -32.0 0.5808 4.0 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
84.076600 306.639000
307.376000 549.507900
550.376000 962.464300
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.4393 -40.5494 2.7 21.6 141.7 6.7782 4.2 4.1 Vela X-1
156.7231 -21.4300 2.7 31.6 84.6 11.1352 4.3 ------ UNKNOWN
141.5280 24.8094 2.3 50.2 11.5 9.2425 5.1 ------ UNKNOWN
Plot creation:
Fri Jun 16 09:08:07 EDT 2023