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
212.7831 -63.4935 0.0129 43.2395 -3.3337 1.5243196 14.945 TRIG_01228797
Foreground time interval of the image:
-4.752 15.341 (delta_t = 20.093 [sec])
Background time interval of the image:
-131.659 -4.752 (delta_t = 126.907 [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 -4.752 sec. to 112.496 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.03293 ( -0.200908 0.189686 )
Norm@50keV : 1.57214E-03 ( -0.000168354 0.0001637 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 64.21 using 59 bins.
Reduced chi-squared = 1.12649
# Null hypothesis probability of 2.39e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 117.2 sec: 0.181355 ( -0.020203 0.020423 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.96992e-06 ( -1.86772e-07 1.87116e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -4.752 sec. to 112.496 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.02766 ( -0.216833 0.178313 )
Epeak [keV] : 1.00000E+04 ( -10000 -10000 )
Norm@50keV : 1.58128E-03 ( -0.000168627 0.000147593 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 64.28 using 59 bins.
Reduced chi-squared = 1.14786
# Null hypothesis probability of 2.09e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 117.2 sec: 0.181377 ( -0.02027 0.020359 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.97541e-06 ( -1.93242e-07 1.80936e-07 ) ergs/cm2
Band function
Time interval is from -4.752 sec. to 112.496 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] : 27.3553 (-4.35709 5.93348)
R^2/D10^2 : 3.07793E-03 (-0.00136388 0.00224351)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 101.11 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 2.89e-04 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.462e-08 1.000e-08
25- 50 2.644e-07 4.952e-08
50-150 1.441e-06 2.151e-07
15-150 1.749e-06 2.344e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-18.1269 -200)
Norm : 0.811855 (-0.0794095 0.0794095)
------------------------------------------------------------
#Fit statistic : Chi-Squared 91.79 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 2.38e-03 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.368e-07 3.662e-08
25- 50 4.556e-07 1.328e-07
50-150 9.992e-07 5.296e-07
15-150 1.692e-06 8.759e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 10.0157 (-2.44227 1.93614)
R1^2/D10^2 : 5.83084E-02 (-0.0300959 0.0910787)
kT2 [keV] : 94.3419 (-47.2541 -94.3342)
R2^2/D10^2 : 1.24472E-04 (-9.181e-05 0.000452523)
------------------------------------------------------------
#Fit statistic : Chi-Squared 58.62 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 3.44e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.480e-07 6.758e-08
25- 50 4.148e-07 1.741e-07
50-150 1.456e-06 1.420e-06
15-150 2.019e-06 1.541e-06
Peak spectrum fit
Power-law model
Time interval is from -0.036 sec. to 0.964 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.332172 ( -0.777687 0.608688 )
Norm@50keV : 6.17718E-03 ( -0.00617718 0.00278931 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 46.81 using 59 bins.
Reduced chi-squared = 0.821228
# Null hypothesis probability of 8.30e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 0.756256 ( -0.253011 0.278384 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.07006e-08 ( -2.41518e-08 2.41518e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.036 sec. to 0.964 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -3.39617 ( 3.30248 3.2254 )
Epeak [keV] : 131.412 ( -40.5575 -133.289 )
Norm@50keV : 3.54257E-02 ( -0.0319729 0.930729 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 46.66 using 59 bins.
Reduced chi-squared = 0.833214
# Null hypothesis probability of 8.09e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 0.736919 ( -0.328061 0.290101 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.3947e-10 ( -6.39439e-10 1.79458e-08 ) ergs/cm2
Band function
Time interval is from -0.036 sec. to 0.964 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] : 44.3600 (-15.4143 59.0581)
R^2/D10^2 : 4.57590E-03 (-0.00457669 0.0101391)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 46.62 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.35e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.077e-09 6.835e-10
25- 50 7.560e-09 4.427e-09
50-150 8.156e-08 4.625e-08
15-150 9.019e-08 5.250e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-66.4755 -200)
Norm : 3.66964 (-1.18987 1.18987)
------------------------------------------------------------
#Fit statistic : Chi-Squared 59.37 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 3.89e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.156e-09 5.695e-09
25- 50 1.761e-08 1.101e-08
50-150 3.863e-08 2.395e-08
15-150 6.540e-08 3.931e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.84376 (-3.75959 7.39815)
R1^2/D10^2 : 8.36358 (-8.60735 273.019)
kT2 [keV] : 49.0903 (-18.1516 96.0224)
R2^2/D10^2 : 3.49400E-03 (-0.00352569 0.00473331)
------------------------------------------------------------
#Fit statistic : Chi-Squared 44.43 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.45e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.183e-09 5.290e-09
25- 50 8.722e-09 4.351e-09
50-150 8.055e-08 4.597e-08
15-150 9.645e-08 5.125e-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: 0.677061 ( -0.206073 0.190027 )
Norm@50keV : 4.92929E-03 ( -0.000612489 0.000585566 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 69.73 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.20e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 20.09 sec: 0.570873 ( -0.06215 0.0631341 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.22145e-06 ( -1.05586e-07 1.05591e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.677915 ( -0.227414 0.182399 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 4.98741E-03 ( -0.000633319 0.00109696 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 69.84 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.01e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 20.09 sec: 0.575415 ( -0.067402 0.058758 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.22218e-06 ( -1.05818e-07 1.05446e-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) = 3.73e-07
S(50-100 keV) = 7.29e-07
T90 vs. Hardness ratio plot
T90 = 85.1199998855591 sec.
Hardness ratio (energy fluence ratio) = 1.95442
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.56719
Count Ratio (50-100 keV) / (15-25 keV) = 1.59644
Mask shadow pattern
IMX = 9.387684073228436E-01, IMY = 5.468377136323409E-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:
-131.659400 -4.752000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
186.8055 -62.7831 19.8 54.4 1.4 -0.3802 -0.6 4.2 GX 301-2
244.9694 -15.6456 0.7 18.9 108.9 4.7752 17.7 0.7 Sco X-1
256.0295 -37.8432 1.5 7.3 -20.9 1.8758 8.0 2.0 4U 1700-377
256.2970 -36.3818 3.8 5.8 -20.3 0.7065 3.0 7.1 GX 349+2
263.0224 -24.6859 3.4 7.7 -170.5 0.7465 3.4 3.7 GX 1+4
264.9079 -44.5448 4.9 15.0 -51.1 0.5197 2.4 9.1 4U 1735-44
268.3675 -1.4530 152.4 30.9 170.7 -0.0225 -0.1 0.0 SW J1753.5-0127
270.1614 -25.1911 3.6 12.4 -143.8 0.7622 3.4 9.5 GX 5-1
270.3583 -25.6164 3.7 12.3 -141.6 0.8028 3.6 8.2 GRS 1758-258
274.0218 -14.0795 2.1 22.4 -164.7 1.3055 5.5 2.8 GX 17+2
276.0207 -30.3456 4.9 15.9 -117.0 0.5445 2.3 5.1 H1820-303
284.9076 -24.7954 3.5 24.8 -127.6 0.8149 3.3 10.3 HT1900.1-2455
288.9355 11.0415 0.0 51.4 -169.9 0.5813 0.9 9.9 GRS 1915+105
262.9994 -33.8247 5.7 5.6 -84.4 0.4431 2.0 0.8 GX 354-0
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-4.752000 15.340590
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
186.5802 -62.6851 7.2 54.5 1.6 -0.3821 -1.6 5.5 GX 301-2
245.0679 -15.5256 8.6 19.0 109.3 0.0907 1.3 8.6 Sco X-1
255.8227 -37.7704 3.4 7.3 -19.5 0.1934 3.4 8.9 4U 1700-377
256.6321 -36.3437 15.6 5.8 -22.9 0.0427 0.7 10.6 GX 349+2
263.0269 -24.7788 208.0 7.6 -170.0 0.0031 0.1 2.2 GX 1+4
264.8950 -44.3401 40.1 14.9 -51.4 -0.0182 -0.3 9.3 4U 1735-44
268.3260 -1.3338 2.6 31.0 170.5 -0.3058 -4.4 7.6 SW J1753.5-0127
270.1120 -25.0660 3.4 12.4 -144.4 -0.2001 -3.4 9.4 GX 5-1
270.2713 -25.8395 6.2 12.1 -140.8 0.1089 1.9 6.0 GRS 1758-258
274.1961 -13.9589 0.0 22.6 -164.5 -0.0772 -1.2 12.0 GX 17+2
276.1435 -30.2868 0.0 16.0 -117.2 -0.0610 -0.9 12.3 H1820-303
285.1947 -24.9305 16.8 25.0 -127.0 -0.0498 -0.7 8.7 HT1900.1-2455
288.7976 10.9461 39.6 51.3 -170.0 0.0439 0.3 0.1 GRS 1915+105
263.0102 -34.0126 9.4 5.7 -82.9 0.0740 1.2 10.7 GX 354-0
223.1226 -58.9937 2.1 36.7 -1.4 0.4277 5.5 ------ UNKNOWN
212.7831 -63.4935 0.8 43.2 -3.3 1.5245 14.9 ------ UNKNOWN
260.5267 -82.4603 3.0 51.8 -31.2 0.7660 3.8 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
128.940610 962.281100
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.5404 -40.5476 26.4 48.9 -37.9 0.2401 0.4 0.7 Vela X-1
170.3206 -60.6208 113.9 19.7 -38.3 -0.0186 -0.1 0.2 Cen X-3
186.2052 -62.7485 0.0 11.9 -35.6 0.5394 3.3 12.5 GX 301-2
255.8365 -37.8913 4.2 36.2 128.6 1.0251 2.8 7.6 4U 1700-377
256.3467 -36.2859 5.9 37.8 127.8 0.8266 2.0 9.3 GX 349+2
264.5826 -44.5466 7.0 34.5 144.5 -0.5023 -1.6 9.0 4U 1735-44
263.0042 -33.8071 46.9 42.7 133.2 0.1521 0.2 1.8 GX 354-0
176.6652 -26.6411 2.4 43.6 13.1 1.4553 4.9 ------ UNKNOWN
305.6220 -42.3450 2.3 54.1 177.1 3.3350 5.1 ------ UNKNOWN
177.8898 -39.0481 2.7 32.0 5.9 0.9216 4.3 ------ UNKNOWN
140.8923 -39.7646 2.3 47.2 -32.8 2.0095 4.9 ------ UNKNOWN
130.3136 -49.9885 2.2 43.7 -49.9 2.3358 5.3 ------ UNKNOWN
Plot creation:
Sat Nov 16 17:48:15 EST 2024