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
84.3132 +22.9682 0.0104 12.4 144.6 3.6638 18.6 TRIG_01186291
------------------------------------------
Foreground time interval of the image:
0.000 95.520 (delta_t = 95.520 [sec])
97.000 124.000 (delta_t = 27.000 [sec])
Background time interval of the image:
-60.000 0.000 (delta_t = 60.000 [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
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
Multiple GTIs in the spectrum
tstart tstop
0.000000 95.520000
97.000000 124.000000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.21595 ( -0.0974449 0.0998513 )
Norm@50keV : 2.02268E-03 ( -0.000120166 0.000118819 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.59 using 59 PHA bins.
# Reduced chi-squared = 0.9403 for 57 degrees of freedom
# Null hypothesis probability = 6.036247e-01
Photon flux (15-150 keV) in 122.5 sec: 0.337695 ( -0.0160697 0.016115 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.335e-06 ( -1.1856e-07 1.19581e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
0.000000 95.520000
97.000000 124.000000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.91542 ( -0.430367 0.219899 )
Epeak [keV] : 11.7391 ( -9.46034 19.7435 )
Norm@50keV : 2.99386E-03 ( -0.000737157 0.00223065 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.80 using 59 PHA bins.
# Reduced chi-squared = 0.9250 for 56 degrees of freedom
# Null hypothesis probability = 6.345089e-01
Photon flux (15-150 keV) in 122.5 sec: 0.330955 ( -0.018055 0.018079 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.25554e-06 ( -1.5277e-07 1.5484e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
0.000000 95.520000
97.000000 124.000000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.19332 ( -0.599342 3.71724 )
beta : -2.38131 ( 2.38188 0.185394 )
Epeak [keV] : 25.9297 ( -11.05 5.74594 )
Norm@50keV : 9.19023E-03 ( -0.00598922 559.038 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.67 using 59 PHA bins.
# Reduced chi-squared = 0.9031 for 55 degrees of freedom
# Null hypothesis probability = 6.778178e-01
Photon flux (15-150 keV) in 122.5 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.25116e-06 ( -2.2503e-06 -1.38413e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.10227 ( )
R^2/D10^2 : 0.206746 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 137.54 using 59 PHA bins.
# Reduced chi-squared = 2.4130 for 57 degrees of freedom
# Null hypothesis probability = 1.312847e-08
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.109e-07 3.442e-08
25- 50 8.888e-07 4.508e-08
50-150 3.510e-07 4.808e-08
15-150 1.651e-06 9.126e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 50.0334 (-6.41372 8.24099)
Norm : 1.85115 (-0.160837 0.193316)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.546e-07 3.932e-08
25- 50 7.967e-07 3.822e-08
50-150 7.740e-07 9.733e-08
15-150 2.125e-06 1.188e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.14103 (-0.745992 0.732083)
R1^2/D10^2 : 0.792485 (-0.270663 0.501827)
kT2 [keV] : 21.4772 (-4.04591 6.0856)
R2^2/D10^2 : 4.50164E-03 (-0.00274538 0.00605761)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.502e-07 7.883e-08
25- 50 7.750e-07 9.849e-08
50-150 9.070e-07 3.243e-07
15-150 2.232e-06 4.416e-07
Peak spectrum fit
Power-law model
Time interval is from 1.000 sec. to 2.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.95696 ( -0.552145 0.670664 )
Norm@50keV : 3.00110E-03 ( -0.00125984 0.00116407 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.10 using 59 PHA bins.
# Reduced chi-squared = 0.9668 for 57 degrees of freedom
# Null hypothesis probability = 5.465029e-01
Photon flux (15-150 keV) in 1 sec: 0.441485 ( -0.131826 0.131844 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.76244e-08 ( -1.02976e-08 1.10342e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.000 sec. to 2.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.80493 ( -4.16481 1.06069 )
Epeak [keV] : 53.0205 ( )
Norm@50keV : 3.68872E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.09 using 59 PHA bins.
# Reduced chi-squared = 0.9838 for 56 degrees of freedom
# Null hypothesis probability = 5.092842e-01
Photon flux (15-150 keV) in 1 sec: 0.439450 ( -0.134411 0.133336 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.71728e-08 ( -1.13511e-08 1.1379e-08 ) ergs/cm2
Band function
Time interval is from 1.000 sec. to 2.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.75514 ( -0.2432 1.99183 )
beta : -9.37113 ( 9.37164 19.3716 )
Epeak [keV] : 55.5062 ( -47.0845 -53.4976 )
Norm@50keV : 3.87629E-03 ( -0.00115857 0.0049736 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.09 using 59 PHA bins.
# Reduced chi-squared = 1.002 for 55 degrees of freedom
# Null hypothesis probability = 4.710719e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.24208 (-2.72613 4.30364)
R^2/D10^2 : 0.280719 (-0.28049 0.783289)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.730e-09 2.852e-09
25- 50 1.047e-08 6.460e-09
50-150 4.331e-09 3.283e-09
15-150 1.954e-08 1.214e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 70.1638 (-42.6008 -70.1638)
Norm : 2.17616 (-0.807777 1.58453)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.585e-09 3.434e-09
25- 50 8.891e-09 5.315e-09
50-150 1.144e-08 1.022e-08
15-150 2.592e-08 1.794e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.33877 (-1.72475 39.0719)
R1^2/D10^2 : 8932.03 (-8933.01 9.30276e+10)
kT2 [keV] : 10.6948 (-3.45043 -10.6959)
R2^2/D10^2 : 0.149565 (-0.149509 0.188432)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.077e-09 2.403e-09
25- 50 9.458e-09 5.690e-09
50-150 6.556e-09 4.576e-09
15-150 2.109e-08 1.237e-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: 2.21595 ( -0.0974449 0.0998513 )
Norm@50keV : 2.02268E-03 ( -0.000120166 0.000118819 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.59 using 59 PHA bins.
# Reduced chi-squared = 0.9403 for 57 degrees of freedom
# Null hypothesis probability = 6.036247e-01
Photon flux (15-150 keV) in 122.5 sec: 0.337695 ( -0.0160697 0.016115 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.335e-06 ( -1.1856e-07 1.19581e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.91542 ( -0.430367 0.219899 )
Epeak [keV] : 11.7391 ( -9.46034 19.7435 )
Norm@50keV : 2.99386E-03 ( -0.000737157 0.00223065 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.80 using 59 PHA bins.
# Reduced chi-squared = 0.9250 for 56 degrees of freedom
# Null hypothesis probability = 6.345089e-01
Photon flux (15-150 keV) in 122.5 sec: 0.330955 ( -0.018055 0.018079 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.25554e-06 ( -1.5277e-07 1.5484e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.19332 ( -1.27379 3.71717 )
beta : -2.38131 ( 2.38188 0.185394 )
Epeak [keV] : 25.9297 ( -11.05 5.74594 )
Norm@50keV : 9.19023E-03 ( -0.00606131 553.986 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.67 using 59 PHA bins.
# Reduced chi-squared = 0.9031 for 55 degrees of freedom
# Null hypothesis probability = 6.778178e-01
Photon flux (15-150 keV) in 122.5 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.25116e-06 ( -2.2503e-06 -1.38413e-07 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 7.42e-07
S(50-100 keV) = 6.39e-07
T90 vs. Hardness ratio plot
T90 = 106 sec.
Hardness ratio (energy fluence ratio) = 0.861186
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.921552
Count Ratio (50-100 keV) / (15-25 keV) = 0.386465
Mask shadow pattern
IMX = -1.791980196961205E-01, IMY = -1.273542802140407E-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:
-60.000000 0.000000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
83.4858 21.9614 20.3 13.2 161.5 0.0641 0.6 8.8 Crab
81.4175 18.7810 2.5 12.4 145.1 0.5261 4.6 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
0.000000 95.520000
97.000000 124.000000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
83.8210 21.9485 5.2 12.2 139.4 -0.4504 -2.2 11.2 Crab
50.8151 18.9362 2.6 41.8 115.5 3.9078 4.4 ------ UNKNOWN
84.3132 22.9682 0.6 12.4 144.6 3.6636 18.6 ------ UNKNOWN
127.6976 -34.3740 2.3 58.7 -18.1 7.4395 5.1 ------ UNKNOWN
125.4109 -8.7084 2.5 38.8 -40.3 1.5714 4.6 ------ UNKNOWN
132.4584 -25.2180 2.4 54.7 -29.1 4.3542 4.8 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
Plot creation:
Mon Aug 21 20:34:46 EDT 2023