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
136.4422 -30.5193 0.0145 15.8259 -155.1310 2.7254480 13.319 TRIG_01252402
Foreground time interval of the image:
-68.668 68.461 (delta_t = 137.129 [sec])
Background time interval of the image:
-144.139 -68.668 (delta_t = 75.471 [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 8.192000
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 8.192000
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 8.192000
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 -68.668 sec. to 81.476 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.74982 ( -0.120571 0.12297 )
Norm@50keV : 1.30715E-03 ( -9.68157e-05 9.58471e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 47.40 using 59 bins.
Reduced chi-squared = 0.831579
# Null hypothesis probability of 8.14e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 150.1 sec: 0.176745 ( -0.011931 0.011943 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.81072e-06 ( -1.38468e-07 1.39985e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -68.668 sec. to 81.476 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.23751 ( -0.529047 0.471513 )
Epeak [keV] : 68.7060 ( -16.046 184.036 )
Norm@50keV : 2.45880E-03 ( -0.00106232 0.00221282 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 43.91 using 59 bins.
Reduced chi-squared = 0.784107
# Null hypothesis probability of 8.79e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 150.1 sec: 0.172377 ( -0.012565 0.012567 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.72651e-06 ( -1.56181e-07 1.58573e-07 ) ergs/cm2
Band function
Time interval is from -68.668 sec. to 81.476 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] : 12.2840 (-1.02913 1.13474)
R^2/D10^2 : 3.86721E-02 (-0.0107527 0.0147818)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 89.13 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 4.17e-03 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.856e-07 2.244e-08
25- 50 6.000e-07 5.208e-08
50-150 5.528e-07 8.353e-08
15-150 1.338e-06 1.109e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 116.462 (-29.0429 40.5817)
Norm : 0.749621 (-0.0633392 0.0803815)
------------------------------------------------------------
#Fit statistic : Chi-Squared 44.02 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.96e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.934e-07 3.047e-08
25- 50 5.221e-07 4.435e-08
50-150 9.180e-07 3.183e-07
15-150 1.734e-06 3.563e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.22540 (-1.27766 1.40088)
R1^2/D10^2 : 0.299503 (-0.148539 0.392085)
kT2 [keV] : 21.2019 (-3.7403 5.97574)
R2^2/D10^2 : 3.95741E-03 (-0.00244523 0.00466682)
------------------------------------------------------------
#Fit statistic : Chi-Squared 42.72 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.86e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.939e-07 8.839e-08
25- 50 5.228e-07 1.304e-07
50-150 8.989e-07 3.823e-07
15-150 1.716e-06 4.867e-07
Peak spectrum fit
Power-law model
Time interval is from 69.712 sec. to 70.712 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.80401 ( -0.296355 0.318285 )
Norm@50keV : 5.96061E-03 ( -0.00125434 0.00121751 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 61.14 using 59 bins.
Reduced chi-squared = 1.07263
# Null hypothesis probability of 3.30e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 0.822682 ( -0.145652 0.145686 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.48744e-08 ( -1.14684e-08 1.17833e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 69.712 sec. to 70.712 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.934903 ( -1.54214 1.13078 )
Epeak [keV] : 53.6701 ( -20.3264 -53.6702 )
Norm@50keV : 1.83861E-02 ( -0.018386 0.121419 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 59.52 using 59 bins.
Reduced chi-squared = 1.06286
# Null hypothesis probability of 3.49e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 0.803690 ( -0.147543 0.14775 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.11152e-08 ( -1.19031e-08 1.2717e-08 ) ergs/cm2
Band function
Time interval is from 69.712 sec. to 70.712 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] : 11.2859 (-2.35354 2.96885)
R^2/D10^2 : 0.254199 (-0.146582 0.348558)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 65.33 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 2.10e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.797e-09 2.483e-09
25- 50 1.986e-08 5.650e-09
50-150 1.456e-08 6.444e-09
15-150 4.122e-08 1.222e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 93.0250 (-40.6639 -93.025)
Norm : 3.74700 (-0.821848 1.10552)
------------------------------------------------------------
#Fit statistic : Chi-Squared 59.75 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 3.76e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.785e-09 2.477e-09
25- 50 1.667e-08 4.140e-09
50-150 2.590e-08 1.741e-08
15-150 5.235e-08 2.232e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.10627 (-2.74832 3.34906)
R1^2/D10^2 : 1.53005 (-1.1928 14.2715)
kT2 [keV] : 19.2807 (-6.4801 21.0887)
R2^2/D10^2 : 2.49082E-02 (-0.0244503 0.118262)
------------------------------------------------------------
#Fit statistic : Chi-Squared 58.77 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 3.39e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.581e-09 5.460e-09
25- 50 1.685e-08 9.000e-09
50-150 2.489e-08 1.594e-08
15-150 5.132e-08 2.726e-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: 1.75388 ( -0.134389 0.137608 )
Norm@50keV : 1.19943E-03 ( -0.000100814 9.96168e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 42.54 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 9.23e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 137.1 sec: 0.162416 ( -0.0122537 0.012263 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.51704e-06 ( -1.31443e-07 1.32974e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.22282 ( -0.592381 0.52057 )
Epeak [keV] : 67.1393 ( -16.4147 379.292 )
Norm@50keV : 2.31882E-03 ( -0.00108229 0.00246581 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 39.49 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 9.54e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 137.1 sec: 0.158473 ( -0.012824 0.012823 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.44524e-06 ( -1.46877e-07 1.49617e-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) = 5.00e-07
S(50-100 keV) = 5.94e-07
T90 vs. Hardness ratio plot
T90 = 126.287999868393 sec.
Hardness ratio (energy fluence ratio) = 1.188
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.2034
Count Ratio (50-100 keV) / (15-25 keV) = 0.733808
Mask shadow pattern
IMX = -2.571756397475418E-01, IMY = 1.192078325277653E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 8.192000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 8.192000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 8.192000
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:
-144.139410 -68.668000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.5300 -40.5581 241.8 9.6 167.2 -0.0059 -0.0 0.2 Vela X-1
170.3146 -60.6210 45.9 21.8 33.0 -0.0371 -0.3 0.1 Cen X-3
186.4400 -62.6487 16.0 29.3 27.6 0.1170 0.7 9.4 GX 301-2
145.9167 -70.0332 3.1 26.5 64.9 0.6552 3.7 ------ UNKNOWN
135.9465 -60.9675 2.1 18.8 81.4 0.7745 5.5 ------ UNKNOWN
105.0047 1.0702 2.2 58.7 -169.2 4.1061 5.3 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-68.668000 68.460590
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.7292 -40.4807 6.5 9.5 168.0 -0.3577 -1.8 10.2 Vela X-1
170.2278 -60.4744 14.3 21.6 32.8 -0.1949 -0.8 9.3 Cen X-3
186.6476 -62.7983 3.3 29.5 27.8 0.9059 3.5 1.7 GX 301-2
110.0946 -30.5567 2.2 32.4 164.2 1.2682 5.2 ------ UNKNOWN
125.8486 -33.3522 2.3 19.9 176.7 1.0087 5.0 ------ UNKNOWN
158.4624 -45.9435 2.5 7.9 -5.1 0.9344 4.6 ------ UNKNOWN
136.4421 -30.5193 0.9 15.8 -155.1 2.7261 13.3 ------ UNKNOWN
175.7025 -22.4204 2.1 31.2 -60.1 1.7588 5.6 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
149.860580 482.740000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.6624 -40.4448 4.6 41.4 -155.5 0.6962 2.5 9.0 Vela X-1
169.9481 -60.5193 8.8 17.3 167.8 -0.2305 -1.3 12.5 Cen X-3
186.8615 -62.8681 3.0 13.5 139.5 0.6584 3.8 8.1 GX 301-2
244.9378 -15.6316 5.0 53.1 12.7 1.3046 2.3 2.5 Sco X-1
256.0529 -37.7232 9.1 44.7 43.1 -0.5614 -1.3 7.9 4U 1700-377
256.5312 -36.4754 6.1 45.8 42.0 0.9055 1.9 5.6 GX 349+2
245.4811 -12.1677 3.0 56.2 10.6 3.6769 3.8 ------ UNKNOWN
125.6482 -46.4137 2.0 44.4 -168.7 1.4933 5.7 ------ UNKNOWN
177.2395 -24.5627 2.5 28.7 -89.6 1.1918 4.6 ------ UNKNOWN
Plot creation:
Fri Nov 15 20:14:14 EST 2024