Special notes of this burst
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
328.0969 43.5446 0.0119 21.5099 -11.1749 2.2510730 16.231 TRIG_01031636
Foreground time interval of the image:
-40.336 57.293 (delta_t = 97.629 [sec])
Background time interval of the image:
-239.008 -40.336 (delta_t = 198.672 [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 -40.336 sec. to 134.716 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.51184 ( -0.122282 0.12302 )
Norm@50keV : 1.42022E-03 ( -9.56811e-05 9.51783e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 51.47 using 59 bins.
Reduced chi-squared = 0.902982
# Null hypothesis probability of 6.82e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 175.1 sec: 0.177875 ( -0.0118 0.011821 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.35492e-06 ( -1.75273e-07 1.76919e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -40.336 sec. to 134.716 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.51258 ( -0.143437 0.120929 )
Epeak [keV] : 9999.34 ( -9999.36 -9999.36 )
Norm@50keV : 1.42175E-03 ( -9.45419e-05 0.000562465 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 51.48 using 59 bins.
Reduced chi-squared = 0.919286
# Null hypothesis probability of 6.46e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 175.1 sec: 0.178598 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.3829e-06 ( -2.05562e-07 1.45443e-07 ) ergs/cm2
Band function
Time interval is from -40.336 sec. to 134.716 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] : 14.6716 ( )
R^2/D10^2 : 2.07849E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 127.70 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 2.45e-07 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.646e-07 2.159e-08
25- 50 6.405e-07 6.242e-08
50-150 9.289e-07 1.296e-07
15-150 1.734e-06 1.513e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-42.5047 -200)
Norm : 0.721253 (-0.0468437 0.0468437)
------------------------------------------------------------
#Fit statistic : Chi-Squared 54.59 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 5.66e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.153e-07 2.381e-08
25- 50 6.065e-07 5.104e-08
50-150 1.330e-06 3.753e-07
15-150 2.252e-06 3.669e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.84682 (-1.12569 1.2757)
R1^2/D10^2 : 0.220897 (-0.0988783 0.204422)
kT2 [keV] : 31.2109 (-6.31562 11.3854)
R2^2/D10^2 : 1.30953E-03 (-0.000795846 0.00147091)
------------------------------------------------------------
#Fit statistic : Chi-Squared 49.88 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 6.70e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.186e-07 7.188e-08
25- 50 5.868e-07 1.206e-07
50-150 1.503e-06 5.487e-07
15-150 2.409e-06 6.912e-07
Peak spectrum fit
Power-law model
Time interval is from 2.684 sec. to 3.684 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.41541 ( -0.568426 0.581881 )
Norm@50keV : 4.82449E-03 ( -0.0013358 0.00126298 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 50.12 using 59 bins.
Reduced chi-squared = 0.879298
# Null hypothesis probability of 7.29e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 0.589598 ( -0.152693 0.152804 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.64879e-08 ( -1.43557e-08 1.46879e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 2.684 sec. to 3.684 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 6.72769 ( -4.23791 1.33178 )
Epeak [keV] : 707.136 ( -66.8945 137.599 )
Norm@50keV : 1.65726E-05 ( -1.59042e-05 0.00147647 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 45.09 using 59 bins.
Reduced chi-squared = 0.805179
# Null hypothesis probability of 8.52e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 0.159947 ( -0.110981 0.190297 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.07783e-08 ( -1.93519e-08 -2.8479e-09 ) ergs/cm2
Band function
Time interval is from 2.684 sec. to 3.684 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] : 16.4550 (-6.0659 18.1974)
R^2/D10^2 : 4.53729E-02 (-0.0433775 0.168824)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 59.19 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 3.96e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.523e-09 1.598e-09
25- 50 1.087e-08 6.395e-09
50-150 2.079e-08 1.379e-08
15-150 3.419e-08 2.092e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.362 (-119.833 -199.363)
Norm : 2.38786 (-0.615619 0.615611)
------------------------------------------------------------
#Fit statistic : Chi-Squared 51.37 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 6.85e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.946e-09 3.528e-09
25- 50 1.144e-08 6.650e-09
50-150 2.508e-08 1.527e-08
15-150 4.247e-08 2.518e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.94385 (-2.67065 6.81325)
R1^2/D10^2 : 40.3885 (-35.4605 -35.6629)
kT2 [keV] : 32.6166 (-17.8851 -33.3941)
R2^2/D10^2 : 4.99692E-03 (-0.00429879 0.0600628)
------------------------------------------------------------
#Fit statistic : Chi-Squared 48.15 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 7.32e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.497e-09 4.248e-09
25- 50 5.943e-09 3.312e-09
50-150 3.640e-08 2.288e-08
15-150 4.984e-08 2.808e-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: 1.42413 ( -0.154182 0.154414 )
Norm@50keV : 1.52281E-03 ( -0.000127436 0.00012687 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 57.05 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 4.73e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 97.63 sec: 0.186490 ( -0.0155752 0.0156132 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.42966e-06 ( -1.34428e-07 1.35707e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.25218 ( -0.160826 0.155696 )
Epeak [keV] : 90.3450 ( -9999.36 -9999.36 )
Norm@50keV : 5.50738E-04 ( -0.000250721 0.000226497 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 56.44 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 4.58e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 97.63 sec: 0.186727 ( -0.01641 0.015349 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.42144e-06 ( -1.27104e-07 1.40607e-07 ) 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) = 5.87e-07
S(50-100 keV) = 8.21e-07
T90 vs. Hardness ratio plot
T90 = 139.407999992371 sec.
Hardness ratio (energy fluence ratio) = 1.39864
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.40121
Count Ratio (50-100 keV) / (15-25 keV) = 1.03276
Mask shadow pattern
IMX = 3.866379967327187E-01, IMY = 7.638013210396750E-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:
-239.008000 -40.336000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
299.6700 35.2188 7.0 44.0 -23.2 0.6670 1.7 4.0 Cyg X-1
308.1340 40.9215 3.0 36.2 -17.0 1.1080 3.9 2.2 Cyg X-3
326.3936 38.3698 7.5 22.5 -25.2 0.3328 1.5 10.8 Cyg X-2
49.0542 53.8735 2.8 40.9 98.3 3.5933 4.2 ------ UNKNOWN
6.5704 59.5820 2.1 24.4 65.8 1.4445 5.5 ------ UNKNOWN
291.1540 46.0216 3.4 47.5 -6.3 1.3583 3.4 ------ UNKNOWN
281.8817 31.5664 2.8 59.1 -20.3 5.2325 4.2 ------ UNKNOWN
289.2255 26.9215 2.5 55.5 -28.6 4.9179 4.6 ------ UNKNOWN
8.5269 -17.1807 3.6 55.2 -144.9 4.9061 3.2 ------ UNKNOWN
312.8099 12.5076 2.9 44.5 -60.2 3.6711 4.0 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-40.336000 57.292580
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
299.4233 35.3493 7.3 44.2 -22.9 0.4013 1.6 12.1 Cyg X-1
307.9276 40.8562 13.0 36.4 -17.1 -0.1676 -0.9 10.1 Cyg X-3
326.3542 38.2832 10.4 22.6 -25.4 -0.1644 -1.1 8.9 Cyg X-2
22.5569 76.9688 2.1 42.4 60.2 3.5509 5.6 ------ UNKNOWN
328.0969 43.5445 0.7 21.5 -11.2 2.2511 16.2 ------ UNKNOWN
9.9121 3.5718 2.1 35.7 -155.3 0.9959 5.6 ------ UNKNOWN
354.0995 0.2152 2.6 36.2 -127.7 1.0314 4.5 354.3 UNKNOWN
11.9137 -12.7231 2.6 51.7 -150.3 1.8355 4.5 ------ UNKNOWN
304.3752 16.5537 2.4 48.6 -49.0 3.2107 4.9 ------ UNKNOWN
318.0001 9.5979 2.1 42.7 -68.3 2.9940 5.6 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
105.492600 963.008800
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.3073 35.2747 6.5 55.7 13.7 -7.5552 -2.0 8.4 Her X-1
288.8953 10.9280 7.8 47.0 -36.7 2.1227 1.5 5.8 GRS 1915+105
299.6022 35.1959 1.0 23.4 -16.0 7.4406 12.0 0.7 Cyg X-1
308.1126 40.9803 1.9 15.0 -7.8 4.5811 6.2 1.7 Cyg X-3
326.1356 38.3106 4.7 5.4 -78.5 1.4511 2.5 1.8 Cyg X-2
40.1011 42.2262 3.1 51.0 150.1 10.5043 3.8 ------ UNKNOWN
252.3531 37.6089 3.3 55.8 17.1 11.0991 3.5 ------ UNKNOWN
Plot creation:
Sun Nov 13 11:50:59 EST 2022