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
38.0548 -26.5053 0.0161 16.7346 -129.5056 0.5769580 11.896 TRIG_01010946
Foreground time interval of the image:
-2.732 12.840 (delta_t = 15.572 [sec])
Background time interval of the image:
-239.248 -2.732 (delta_t = 236.516 [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
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 12.160000
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 12.160000
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 12.160000
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 -2.732 sec. to 12.840 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.78051 ( -0.251486 0.266671 )
Norm@50keV : 1.99429E-03 ( -0.000342221 0.000332643 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 69.65 using 59 bins.
Reduced chi-squared = 1.22193
# Null hypothesis probability of 1.21e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 15.57 sec: 0.272775 ( -0.038544 0.038546 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.86121e-07 ( -4.93877e-08 5.08009e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -2.732 sec. to 12.840 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.17164 ( -1.44735 1.0391 )
Epeak [keV] : 58.0590 ( -21.6605 -58.0544 )
Norm@50keV : 4.44138E-03 ( -0.00444236 0.0261281 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 68.78 using 59 bins.
Reduced chi-squared = 1.22821
# Null hypothesis probability of 1.17e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 15.57 sec: 0.266653 ( -0.040148 0.040045 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.67552e-07 ( -5.63981e-08 6.03914e-08 ) ergs/cm2
Band function
Time interval is from -2.732 sec. to 12.840 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] : 10.8872 (-1.66911 2.03765)
R^2/D10^2 : 9.54475E-02 (-0.0450295 0.0812429)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 76.00 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 4.71e-02 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.673e-08 9.435e-09
25- 50 1.025e-07 2.317e-08
50-150 6.807e-08 2.295e-08
15-150 2.073e-07 4.605e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 97.2692 (-38.9212 -97.2692)
Norm : 1.21864 (-0.217659 0.285689)
------------------------------------------------------------
#Fit statistic : Chi-Squared 68.80 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.36e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.959e-08 9.233e-09
25- 50 8.526e-08 1.791e-08
50-150 1.360e-07 8.036e-08
15-150 2.708e-07 9.443e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.61213 (-6.19507 3.15819)
R1^2/D10^2 : 0.264113 (-0.169492 549.565)
kT2 [keV] : 25.5515 (-24.3547 -25.7885)
R2^2/D10^2 : 2.48375E-03 (-0.00238594 0.0792279)
------------------------------------------------------------
#Fit statistic : Chi-Squared 69.21 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 9.41e-02 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.576e-08 2.559e-08
25- 50 9.124e-08 4.795e-08
50-150 1.347e-07 7.350e-08
15-150 2.717e-07 1.414e-07
Peak spectrum fit
Power-law model
Time interval is from 11.488 sec. to 12.488 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.00439 ( -0.546461 0.644865 )
Norm@50keV : 3.31904E-03 ( -0.00139377 0.00132339 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 59.14 using 59 bins.
Reduced chi-squared = 1.03754
# Null hypothesis probability of 3.97e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 0.498902 ( -0.147398 0.147469 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.06203e-08 ( -1.13246e-08 1.2363e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 11.488 sec. to 12.488 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.96078 ( -1.93694 0.179765 )
Epeak [keV] : 33.7714 ( -34.8736 -34.8852 )
Norm@50keV : 3.53871E-03 ( -0.0037001 15.801 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 59.14 using 59 bins.
Reduced chi-squared = 1.05607
# Null hypothesis probability of 3.62e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 0.498797 ( -0.169263 0.147217 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.02294e-08 ( -1.64538e-08 1.18956e-08 ) ergs/cm2
Band function
Time interval is from 11.488 sec. to 12.488 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] : 7.55928 (-2.00602 2.96086)
R^2/D10^2 : 0.697145 (-0.697118 1.68553)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 59.98 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 3.68e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.884e-09 4.269e-09
25- 50 1.089e-08 7.100e-09
50-150 2.365e-09 2.055e-09
15-150 2.014e-08 1.264e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 56.2543 (-33.5402 -56.2543)
Norm : 2.69603 (-1.07382 2.29286)
------------------------------------------------------------
#Fit statistic : Chi-Squared 59.27 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 3.93e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.700e-09 4.202e-09
25- 50 9.992e-09 6.100e-09
50-150 1.076e-08 8.297e-09
15-150 2.746e-08 1.720e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.51911 (-1.36068 2.66283)
R1^2/D10^2 : 1.12012 (-0.559989 3.77798)
kT2 [keV] : 44.4006 (-33.9032 -44.403)
R2^2/D10^2 : 8.55178E-04 (-0.00084927 0.102903)
------------------------------------------------------------
#Fit statistic : Chi-Squared 56.89 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 4.05e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.261e-09 4.349e-09
25- 50 9.804e-09 5.715e-09
50-150 1.635e-08 9.565e-09
15-150 3.341e-08 1.637e-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: 1.78051 ( -0.251486 0.266671 )
Norm@50keV : 1.99429E-03 ( -0.000342221 0.000332643 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 69.65 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.21e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 15.57 sec: 0.272761 ( -0.0385417 0.0385438 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.8608e-07 ( -4.93585e-08 5.08166e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.17134 ( -1.44727 1.0405 )
Epeak [keV] : 58.0501 ( -21.6588 -58.0536 )
Norm@50keV : 4.44317E-03 ( -0.00444241 0.0261275 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 68.78 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.17e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 15.57 sec: 0.266608 ( -0.040126 0.040101 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.67633e-07 ( -5.64257e-08 6.03011e-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) = 8.00e-08
S(50-100 keV) = 9.31e-08
T90 vs. Hardness ratio plot
T90 = 12.1840000152588 sec.
Hardness ratio (energy fluence ratio) = 1.16375
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.60556
Count Ratio (50-100 keV) / (15-25 keV) = 0.757148
Mask shadow pattern
IMX = -1.912734942294735E-01, IMY = 2.319874738279152E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 12.160000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 12.160000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 12.160000
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:
-239.248000 -2.732000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
76.6416 11.6244 2.4 40.8 96.6 4.4594 4.9 ------ UNKNOWN
95.9221 -35.5798 3.1 54.9 164.7 5.3502 3.7 ------ UNKNOWN
1.1369 33.2398 3.2 58.3 -1.9 5.1521 3.6 ------ UNKNOWN
12.3856 2.8346 2.4 32.2 -29.6 1.3886 4.9 ------ UNKNOWN
357.1987 11.3766 2.9 49.5 -27.2 2.3843 3.9 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-2.732000 12.840000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
65.3732 23.3064 3.8 40.6 72.2 0.5185 3.0 ------ UNKNOWN
21.3285 15.6321 2.2 33.0 -0.6 0.2868 5.1 ------ UNKNOWN
38.0548 -26.5054 1.0 16.7 -129.5 0.5773 11.9 ------ UNKNOWN
4.0892 14.2548 2.1 44.8 -19.5 0.4343 5.5 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
103.652600 242.832000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
103.4159 -35.1755 2.5 55.8 170.8 2.7319 4.7 ------ UNKNOWN
104.5366 -42.2535 2.2 55.6 179.4 2.6341 5.2 ------ UNKNOWN
358.9291 4.9963 2.5 49.3 -1.3 0.8419 4.6 306.6 UNKNOWN
4.4735 -1.5666 2.4 40.8 -3.1 0.6289 4.7 284.4 UNKNOWN
343.0172 -10.5836 2.6 54.1 -29.1 1.8212 4.3 ------ UNKNOWN
340.6823 -12.4658 2.5 55.4 -32.4 2.8170 4.6 ------ UNKNOWN
Plot creation:
Sun Nov 13 12:04:14 EST 2022