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
250.3903 -5.3194 0.0064 44.6764 -21.3511 2.8187548 30.135 TRIG_01180410
Foreground time interval of the image:
-0.216 7.936 (delta_t = 8.152 [sec])
Background time interval of the image:
-239.576 -0.216 (delta_t = 239.360 [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 0.512000
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 0.512000
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 0.512000
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 -0.216 sec. to 7.936 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.80652 ( -0.091441 0.0926036 )
Norm@50keV : 2.27983E-02 ( -0.0012568 0.00125303 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 58.29 using 59 bins.
Reduced chi-squared = 1.02263
# Null hypothesis probability of 4.28e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 8.152 sec: 3.14970 ( -0.18106 0.18168 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.71086e-06 ( -9.54452e-08 9.56654e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.216 sec. to 7.936 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.06206 ( -0.447159 0.408281 )
Epeak [keV] : 63.9075 ( -8.72115 19.2608 )
Norm@50keV : 5.34469E-02 ( -0.0196012 0.0349084 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 47.98 using 59 bins.
Reduced chi-squared = 0.856786
# Null hypothesis probability of 7.68e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 8.152 sec: 3.02626 ( -0.19139 0.19221 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.64329e-06 ( -1.02956e-07 1.02952e-07 ) ergs/cm2
Band function
Time interval is from -0.216 sec. to 7.936 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] : 13.5607 (-0.810989 0.859197)
R^2/D10^2 : 0.482610 (-0.100439 0.126424)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 106.47 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 7.81e-05 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.532e-07 1.516e-08
25- 50 5.517e-07 3.497e-08
50-150 6.569e-07 6.791e-08
15-150 1.362e-06 7.541e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 113.323 (-21.9026 23.753)
Norm : 13.3217 (-0.938406 1.2436)
------------------------------------------------------------
#Fit statistic : Chi-Squared 49.00 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 7.65e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.834e-07 2.580e-08
25- 50 5.019e-07 2.898e-08
50-150 8.702e-07 2.368e-07
15-150 1.656e-06 2.515e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.88601 (-1.51947 1.72244)
R1^2/D10^2 : 3.45411 (-1.72617 4.84666)
kT2 [keV] : 20.9484 (-3.20323 5.85492)
R2^2/D10^2 : 6.98955E-02 (-0.0456023 0.0543379)
------------------------------------------------------------
#Fit statistic : Chi-Squared 50.84 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 6.34e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.581e-07 6.179e-08
25- 50 5.223e-07 1.127e-07
50-150 8.373e-07 2.098e-07
15-150 1.618e-06 3.102e-07
Peak spectrum fit
Power-law model
Time interval is from 1.636 sec. to 2.636 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.86106 ( -0.143873 0.149026 )
Norm@50keV : 3.88250E-02 ( -0.00388363 0.00385805 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 68.54 using 59 bins.
Reduced chi-squared = 1.20246
# Null hypothesis probability of 1.41e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 5.48232 ( -0.54253 0.54395 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.57001e-07 ( -3.56645e-08 3.57524e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.636 sec. to 2.636 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.226801 ( -0.982822 0.781635 )
Epeak [keV] : 53.7711 ( -6.67283 9.8958 )
Norm@50keV : 0.265552 ( -0.15865 0.593599 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 53.32 using 59 bins.
Reduced chi-squared = 0.952143
# Null hypothesis probability of 5.77e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 5.22752 ( -0.55235 0.55465 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.40706e-07 ( -3.76869e-08 3.77366e-08 ) ergs/cm2
Band function
Time interval is from 1.636 sec. to 2.636 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] : 12.6836 (-1.11701 1.24418)
R^2/D10^2 : 1.15917 (-0.350525 0.484554)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 60.97 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 3.35e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.955e-08 6.835e-09
25- 50 1.326e-07 1.505e-08
50-150 1.329e-07 2.510e-08
15-150 3.050e-07 3.255e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 93.8467 (-21.7053 33.3252)
Norm : 25.1555 (-3.17962 3.58521)
------------------------------------------------------------
#Fit statistic : Chi-Squared 58.79 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 4.10e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.571e-08 9.495e-09
25- 50 1.121e-07 1.230e-08
50-150 1.751e-07 6.310e-08
15-150 3.530e-07 6.670e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.16589 (-0.946923 1.78162)
R1^2/D10^2 : 5.08250E+05 (-423131 -423231)
kT2 [keV] : 13.0902 (-1.20032 1.42642)
R2^2/D10^2 : 1.00997 (-0.337947 0.451019)
------------------------------------------------------------
#Fit statistic : Chi-Squared 53.55 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 5.30e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.132e-08 1.237e-08
25- 50 1.258e-07 1.825e-08
50-150 1.402e-07 2.615e-08
15-150 3.173e-07 3.595e-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: 1.80652 ( -0.091441 0.0926036 )
Norm@50keV : 2.27983E-02 ( -0.0012568 0.00125303 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 58.29 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 4.28e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 8.152 sec: 3.14953 ( -0.181043 0.181655 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.71058e-06 ( -9.54664e-08 9.56564e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.06206 ( -0.447159 0.408281 )
Epeak [keV] : 63.9075 ( -8.72115 19.2608 )
Norm@50keV : 5.34469E-02 ( -0.0196012 0.0349084 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 47.98 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 7.68e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 8.152 sec: 3.02579 ( -0.19129 0.19214 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.6438e-06 ( -1.03017e-07 1.02854e-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) = 4.83e-07
S(50-100 keV) = 5.52e-07
T90 vs. Hardness ratio plot
T90 = 5.75599992275238 sec.
Hardness ratio (energy fluence ratio) = 1.14286
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.52225
Count Ratio (50-100 keV) / (15-25 keV) = 0.972817
Mask shadow pattern
IMX = 9.209038686364036E-01, IMY = 3.599928070229617E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.512000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.512000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.512000
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:
-239.576000 -0.216000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9875 -15.6341 0.4 40.9 -37.5 24.9596 26.5 0.6 Sco X-1
255.8390 -38.0189 0.0 22.2 -68.8 0.5193 0.7 12.6 4U 1700-377
256.4505 -36.4652 4.9 21.9 -64.5 1.5163 2.3 2.6 GX 349+2
262.9512 -24.9236 31.5 22.1 -29.8 0.1906 0.4 11.1 GX 1+4
264.7525 -44.5991 10.5 15.9 -90.7 0.6153 1.1 9.0 4U 1735-44
268.4411 -1.4217 9.1 39.2 5.2 0.9006 1.3 4.8 SW J1753.5-0127
270.3075 -25.1094 4.2 17.3 -16.0 1.3913 2.8 2.2 GX 5-1
270.3399 -25.5650 5.6 16.9 -16.9 1.0559 2.1 10.9 GRS 1758-258
274.1034 -13.9614 4.2 25.5 7.5 1.6146 2.7 7.2 GX 17+2
275.7188 -30.3371 8.0 10.2 -14.5 0.7224 1.4 10.8 H1820-303
285.0774 -24.7342 249.0 13.2 34.5 -0.0225 -0.0 11.4 HT1900.1-2455
288.7772 10.7940 0.0 48.9 36.5 -1.5782 -1.1 9.2 GRS 1915+105
262.9437 -33.8518 3.7 17.5 -52.8 1.8095 3.2 2.5 GX 354-0
325.2034 -19.9182 2.7 39.8 105.3 6.6723 4.3 ------ UNKNOWN
307.8410 -13.4907 3.5 32.3 77.6 3.2390 3.3 ------ UNKNOWN
310.3498 -16.3596 2.9 31.6 84.6 3.6718 3.9 ------ UNKNOWN
329.5471 -42.6233 2.5 34.6 142.9 3.8698 4.7 ------ UNKNOWN
1.2526 -58.1947 2.2 52.1 169.7 8.2054 5.2 ------ UNKNOWN
11.6439 -86.8568 2.6 52.0 -153.6 6.4828 4.4 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-0.216000 7.936000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
245.1089 -15.5841 15.0 40.9 -37.4 0.0699 0.8 8.2 Sco X-1
255.9531 -37.7058 5.5 22.1 -67.9 -0.1197 -2.1 8.4 4U 1700-377
256.2931 -36.6001 0.0 22.0 -64.9 0.0951 1.6 12.6 GX 349+2
263.1955 -24.8121 4.6 22.0 -29.2 -0.1327 -2.5 10.9 GX 1+4
264.8636 -44.5741 24.3 15.8 -90.7 0.0262 0.5 9.1 4U 1735-44
268.4296 -1.3141 4.6 39.3 5.2 -0.2155 -2.5 9.1 SW J1753.5-0127
270.3329 -25.2230 17.2 17.2 -16.2 0.0346 0.7 9.0 GX 5-1
270.2186 -25.9393 0.0 16.7 -18.0 0.1329 2.6 12.6 GRS 1758-258
273.9191 -14.0852 10.4 25.4 7.0 -0.0654 -1.1 5.8 GX 17+2
275.8353 -30.5482 7.0 10.0 -14.8 0.0854 1.7 11.8 H1820-303
284.9948 -24.8501 4.2 13.1 34.2 -0.1407 -2.7 4.8 HT1900.1-2455
288.8259 10.9649 74.5 49.1 36.6 -0.0357 -0.2 2.0 GRS 1915+105
262.7997 -33.8229 19.5 17.6 -52.8 0.0328 0.6 9.5 GX 354-0
347.2320 -50.3460 2.5 45.6 157.5 0.5026 4.6 ------ UNKNOWN
346.6344 -51.7342 2.3 45.0 159.3 0.5467 5.0 ------ UNKNOWN
250.3903 -5.3194 0.4 44.7 -21.4 2.8185 30.1 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
Plot creation:
Fri Oct 6 19:00:58 EDT 2023