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
299.6875 -14.8687 0.0093 50.5347 -135.3335 9.7332068 20.590 TRIG_01223470
Foreground time interval of the image:
-7.104 8.048 (delta_t = 15.152 [sec])
Background time interval of the image:
-239.360 -7.104 (delta_t = 232.256 [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 1.024000
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 1.024000
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 1.024000
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 -7.104 sec. to 8.048 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.53741 ( -0.0968861 0.0974261 )
Norm@50keV : 3.87562E-02 ( -0.00237477 0.00237419 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 77.64 using 59 bins.
Reduced chi-squared = 1.36211
# Null hypothesis probability of 3.59e-02 with 57 degrees of freedom
Photon flux (15-150 keV) in 15.15 sec: 4.88877 ( -0.31939 0.32032 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.53839e-06 ( -3.53219e-07 3.54021e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -7.104 sec. to 8.048 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.368529 ( -0.526796 0.47215 )
Epeak [keV] : 76.7562 ( -9.24001 16.7879 )
Norm@50keV : 0.135662 ( -0.0527268 0.0979045 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 57.22 using 59 bins.
Reduced chi-squared = 1.02179
# Null hypothesis probability of 4.30e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 15.15 sec: 4.65650 ( -0.33032 0.33155 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.35134e-06 ( -3.68668e-07 3.68612e-07 ) ergs/cm2
Band function
Time interval is from -7.104 sec. to 8.048 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] : 16.5205 (-1.03539 1.11057)
R^2/D10^2 : 0.415477 (-0.0872851 0.10893)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 82.18 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.62e-02 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.525e-07 4.098e-08
25- 50 1.524e-06 1.270e-07
50-150 2.941e-06 3.159e-07
15-150 4.818e-06 3.522e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-43.0562 -200)
Norm : 20.2342 (-1.22854 1.22854)
------------------------------------------------------------
#Fit statistic : Chi-Squared 67.89 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.53e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.635e-07 5.742e-08
25- 50 1.469e-06 1.058e-07
50-150 3.221e-06 2.530e-07
15-150 5.454e-06 6.037e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.70333 (-1.67338 2.59722)
R1^2/D10^2 : 6.94656 (-4.9653 22.4408)
kT2 [keV] : 19.8799 (-2.00943 3.26467)
R2^2/D10^2 : 0.188591 (-0.0918624 0.0550207)
------------------------------------------------------------
#Fit statistic : Chi-Squared 56.35 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 4.24e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.395e-07 2.651e-07
25- 50 1.458e-06 3.329e-07
50-150 3.197e-06 4.719e-07
15-150 5.294e-06 9.037e-07
Peak spectrum fit
Power-law model
Time interval is from -0.060 sec. to 0.940 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.32773 ( -0.135937 0.136783 )
Norm@50keV : 0.162071 ( -0.0149614 0.014958 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 61.11 using 59 bins.
Reduced chi-squared = 1.07211
# Null hypothesis probability of 3.30e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 19.4382 ( -1.8425 1.845 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.59115e-06 ( -1.57246e-07 1.57609e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.060 sec. to 0.940 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.285883 ( -0.83717 0.707272 )
Epeak [keV] : 77.8412 ( -10.9157 20.5061 )
Norm@50keV : 0.929179 ( -0.487531 1.29278 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 43.26 using 59 bins.
Reduced chi-squared = 0.7725
# Null hypothesis probability of 8.93e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 18.9069 ( -1.8592 1.8633 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.54618e-06 ( -1.6446e-07 1.64544e-07 ) ergs/cm2
Band function
Time interval is from -0.060 sec. to 0.940 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] : 17.5843 (-1.56431 1.74171)
R^2/D10^2 : 1.48778 (-0.417187 0.561742)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 48.31 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 7.87e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.278e-08 1.494e-08
25- 50 4.215e-07 5.400e-08
50-150 9.402e-07 1.467e-07
15-150 1.455e-06 1.560e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-27.4468 -200)
Norm : 81.7540 (-7.5634 7.5634)
------------------------------------------------------------
#Fit statistic : Chi-Squared 63.14 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 2.68e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.035e-07 2.475e-08
25- 50 3.916e-07 6.600e-08
50-150 8.588e-07 3.640e-07
15-150 1.454e-06 4.718e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.14666 (-6.66038 -9.17583)
R1^2/D10^2 : 4.55436 (-3.33734 617.463)
kT2 [keV] : 22.0703 (-4.60978 -22.1228)
R2^2/D10^2 : 0.538982 (-0.53195 0.932785)
------------------------------------------------------------
#Fit statistic : Chi-Squared 43.36 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.72e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.233e-07 6.865e-08
25- 50 4.200e-07 2.174e-07
50-150 1.001e-06 5.550e-07
15-150 1.544e-06 7.850e-07
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: 1.53741 ( -0.0968861 0.0974261 )
Norm@50keV : 3.87562E-02 ( -0.00237477 0.00237419 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 77.64 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 3.59e-02 with 57 degrees of freedom
Photon flux (15-150 keV) in 15.15 sec: 4.88865 ( -0.319379 0.320275 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.53767e-06 ( -3.53442e-07 3.53968e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.368528 ( -0.526796 0.472151 )
Epeak [keV] : 76.7562 ( -9.24 16.7879 )
Norm@50keV : 0.135662 ( -0.052727 0.0979044 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 57.22 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 4.30e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 15.15 sec: 4.65615 ( -0.33025 0.33145 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.35339e-06 ( -3.69281e-07 3.68812e-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) = 1.40e-06
S(50-100 keV) = 1.92e-06
T90 vs. Hardness ratio plot
T90 = 12.3999999761581 sec.
Hardness ratio (energy fluence ratio) = 1.37143
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.72335
Count Ratio (50-100 keV) / (15-25 keV) = 1.72153
Mask shadow pattern
IMX = -8.638342882200678E-01, IMY = 8.538362842692788E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
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:
-239.360000 -23.360000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.0854 -60.6239 53.1 47.6 17.6 0.1717 0.2 6.8 Cen X-3
186.5094 -62.9001 6.8 39.5 17.0 -0.9200 -1.7 8.8 GX 301-2
244.9645 -15.6579 0.7 30.8 143.5 7.9754 17.3 1.4 Sco X-1
255.9878 -37.8850 193.9 8.6 179.1 0.0189 0.1 2.4 4U 1700-377
256.4339 -36.4228 3.2 10.1 178.2 1.1852 3.6 0.1 GX 349+2
262.8425 -24.7685 8.8 22.9 -177.0 -0.4867 -1.3 9.2 GX 1+4
264.7580 -44.2993 4.5 9.3 -118.7 0.9454 2.6 9.1 4U 1735-44
268.4110 -1.4293 5.1 46.8 179.5 1.5478 2.2 2.9 SW J1753.5-0127
270.4469 -25.0360 2.9 25.6 -161.5 1.4383 4.0 9.2 GX 5-1
270.3532 -25.7724 4.7 25.0 -160.8 0.9058 2.5 3.3 GRS 1758-258
274.1008 -13.9070 3.3 37.1 -165.9 1.4121 3.5 9.5 GX 17+2
275.8772 -30.4836 20.8 24.2 -144.6 0.2024 0.6 7.4 H1820-303
285.0506 -24.9473 88.2 33.8 -140.3 -0.0557 -0.1 1.8 HT1900.1-2455
263.0007 -33.9939 5.0 14.6 -164.0 0.7353 2.3 9.6 GX 354-0
239.8399 6.8998 2.2 53.8 141.7 12.8608 5.2 ------ UNKNOWN
259.2625 -46.7452 1.9 5.2 -101.2 2.0741 6.0 ------ UNKNOWN
299.8541 -29.6419 2.8 40.6 -120.0 2.6367 4.1 ------ UNKNOWN
295.8915 -6.7422 2.9 54.5 -145.5 5.6879 4.0 ------ UNKNOWN
298.6006 -4.3180 2.6 58.0 -144.6 20.2317 4.5 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-23.360000 7.640000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.3895 -60.6001 6.6 47.4 17.7 0.3335 1.8 2.6 Cen X-3
186.5025 -62.6664 5.4 39.5 17.4 0.2419 2.2 7.5 GX 301-2
245.0607 -15.5600 13.5 30.8 143.7 0.0805 0.9 6.7 Sco X-1
255.7433 -37.9316 0.0 8.5 178.0 0.0902 1.2 12.7 4U 1700-377
256.6724 -36.3340 0.0 10.2 179.1 -0.0958 -1.2 12.6 GX 349+2
262.9471 -24.5711 4.5 23.1 -177.0 -0.2056 -2.6 11.0 GX 1+4
264.7866 -44.4677 4.6 9.2 -117.6 -0.1802 -2.5 2.2 4U 1735-44
268.2878 -1.3617 3.4 46.8 179.3 -0.4867 -3.4 7.3 SW J1753.5-0127
270.2019 -25.1078 3.9 25.5 -161.9 0.2373 3.0 4.8 GX 5-1
270.3694 -25.9115 5.5 24.9 -160.6 -0.1662 -2.1 10.7 GRS 1758-258
273.9068 -13.8578 0.0 37.0 -166.2 0.1499 1.5 12.2 GX 17+2
275.9626 -30.5216 9.5 24.2 -144.4 -0.1008 -1.2 9.5 H1820-303
285.0913 -24.8553 7.9 33.9 -140.4 -0.1635 -1.5 4.9 HT1900.1-2455
262.9630 -33.6718 5.6 14.9 -164.7 0.1702 2.1 9.9 GX 354-0
223.5781 -20.0829 2.4 34.7 105.1 0.6480 4.8 ------ UNKNOWN
274.0337 -81.6297 2.5 36.5 -28.8 0.4779 4.6 ------ UNKNOWN
296.3854 -50.2872 2.3 29.6 -88.6 0.5644 5.0 ------ UNKNOWN
299.6875 -14.8687 0.6 50.5 -135.3 9.7333 20.6 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
108.940600 962.665700
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
256.1620 -37.9822 6.5 44.7 62.4 12.6209 1.8 11.7 4U 1700-377
256.4389 -36.5455 9.1 44.1 64.2 9.3606 1.3 7.3 GX 349+2
262.8771 -24.6162 7.5 35.9 80.3 -4.8975 -1.5 10.6 GX 1+4
264.6800 -44.5717 4.3 41.9 49.6 10.6315 2.6 7.8 4U 1735-44
268.3304 -1.3251 6.7 33.8 122.6 3.9296 1.7 8.0 SW J1753.5-0127
270.2848 -25.0831 35.9 29.4 77.0 0.6807 0.3 0.2 GX 5-1
270.3024 -25.7431 9.0 29.5 75.6 2.8201 1.3 0.0 GRS 1758-258
273.8418 -13.9171 0.0 25.1 100.8 2.7198 1.7 11.9 GX 17+2
275.9322 -30.3698 82.7 26.8 62.5 -0.2322 -0.1 0.4 H1820-303
285.0307 -24.9426 248.1 17.1 63.5 0.0527 0.0 1.4 HT1900.1-2455
288.6394 11.0632 0.0 28.2 168.4 -2.1268 -1.6 11.7 GRS 1915+105
299.5991 35.2214 1.4 50.1 -168.2 22.5906 8.2 1.3 Cyg X-1
308.1417 40.9447 5.7 56.4 -160.4 7.6700 2.0 1.5 Cyg X-3
262.8134 -33.7723 4.8 38.3 65.6 7.7032 2.4 9.5 GX 354-0
295.0182 -55.0505 2.3 40.3 16.1 8.7470 5.0 ------ UNKNOWN
304.5996 -12.7690 2.2 5.2 -101.5 5.6570 5.2 ------ UNKNOWN
325.1218 38.0167 2.7 58.0 -144.6 63.8065 4.4 ------ UNKNOWN
Plot creation:
Sat Nov 16 19:14:27 EST 2024