Estimated redshift from machine learning (Ukwatta et al. 2016) - may take a few minutes to calcaulte
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
280.3438 -4.9354 0.0046 18.7 27.9 0.7327 42.2 TRIG_01249653
------------------------------------------
Foreground time interval of the image:
-0.004 0.416 (delta_t = 0.420 [sec])
Background time interval of the image:
-239.892 -106.844 (delta_t = 133.048 [sec])
-105.892 -0.004 (delta_t = 105.888 [sec])
Lightcurves
Notes:
- 1) All plots contain as much data as has been downloaded to date.
- 2) The mask-weighted light curves are using the flight position.
- 3) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 4) 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.
- 5) 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.
- 6) 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 0.032000
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 0.032000
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 0.032000
SN=5 or 10 sec. binning (whichever binning is satisfied first)
SN=5 or 10 sec. binning (T < 200 sec)
Spectra
Notes:
- 1) The fitting includes the systematic errors.
- 2) For long bursts, a spectral fit of 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.
- 4) For short bursts (T90<1sec), the specrtum is also fit with Blackbody, OTTB, and Double Blackbody.
Time averaged spectrum fit using the pre-slew DRM
Power-law model
Time interval is from -0.004 sec. to 0.416 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.84906 ( -0.0889335 0.091486 )
Norm@50keV : 6.58483E-02 ( -0.0040951 0.00406518 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 89.43 using 59 PHA bins.
# Reduced chi-squared = 1.569 for 57 degrees of freedom
# Null hypothesis probability = 3.911736e-03
Photon flux (15-150 keV) in 0.42 sec: 16.2635 ( -0.824128 0.827096 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.11259e-07 ( -1.44191e-08 1.44239e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.004 sec. to 0.416 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.23333 ( -0.619095 0.538455 )
Epeak [keV] : 17.9534 ( -9.93244 5.47077 )
Norm@50keV : 0.623143 ( -0.329475 0.875471 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.19 using 59 PHA bins.
# Reduced chi-squared = 0.9856 for 56 degrees of freedom
# Null hypothesis probability = 5.053160e-01
Photon flux (15-150 keV) in 0.42 sec: 15.2199 ( -0.8764 0.8807 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.86042e-07 ( -1.54123e-08 1.56332e-08 ) ergs/cm2
Band function
Time interval is from -0.004 sec. to 0.416 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.202292 ( -1.22442 1.99829 )
beta : -3.50291 ( -0.391753 0.262374 )
Epeak [keV] : 22.7586 ( -4.31897 2.46698 )
Norm@50keV : 3.23879 ( -5.4897 101.435 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.64 using 59 PHA bins.
# Reduced chi-squared = 0.8845 for 55 degrees of freedom
# Null hypothesis probability = 7.145526e-01
Photon flux (15-150 keV) in 0.42 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] : 7.40537 (-0.315818 0.328603)
R^2/D10^2 : 22.6062 (-4.13544 5.06329)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 95.74 using 59 PHA bins.
# Reduced chi-squared = 1.680 for 57 degrees of freedom
# Null hypothesis probability = 1.002606e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.835e-08 6.636e-09
25- 50 1.346e-07 6.657e-09
50-150 2.723e-08 3.499e-09
15-150 2.502e-07 1.132e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 26.2453 (-2.10249 2.33281)
Norm : 142.996 (-14.8958 16.6919)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.134e-07 6.951e-09
25- 50 1.199e-07 5.754e-09
50-150 5.467e-08 6.930e-09
15-150 2.879e-07 1.424e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.85231 (-0.679468 0.298621)
R1^2/D10^2 : 52.8712 (-16.1835 29.7382)
kT2 [keV] : 15.4960 (-3.31138 5.13536)
R2^2/D10^2 : 0.356220 (-0.266516 0.928393)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.049e-07 1.193e-08
25- 50 1.226e-07 1.533e-08
50-150 5.830e-08 2.557e-08
15-150 2.858e-07 4.431e-08
Peak spectrum fit
Power-law model
Time interval is from -0.292 sec. to 0.708 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.83746 ( -0.102344 0.105891 )
Norm@50keV : 2.82228E-02 ( -0.00208139 0.00207071 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 94.21 using 59 PHA bins.
# Reduced chi-squared = 1.653 for 57 degrees of freedom
# Null hypothesis probability = 1.409197e-03
Photon flux (15-150 keV) in 1 sec: 6.91458 ( -0.374 0.375125 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.16152e-07 ( -1.64397e-08 1.64723e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.292 sec. to 0.708 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.800197 ( -0.803885 0.687187 )
Epeak [keV] : 21.0580 ( -7.45442 4.14764 )
Norm@50keV : 0.525257 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.00 using 59 PHA bins.
# Reduced chi-squared = 1.054 for 56 degrees of freedom
# Null hypothesis probability = 3.665250e-01
Photon flux (15-150 keV) in 1 sec: 6.42655 ( -0.39798 0.40028 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.8297e-07 ( -1.7107e-08 1.7566e-08 ) ergs/cm2
Band function
Time interval is from -0.292 sec. to 0.708 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.225526 ( -1.48496 2.3739 )
beta : -3.63175 ( -0.514603 0.327508 )
Epeak [keV] : 23.5398 ( -3.80389 2.20574 )
Norm@50keV : 2.80989 ( -5.9544 187.3 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.83 using 59 PHA bins.
# Reduced chi-squared = 0.9969 for 55 degrees of freedom
# Null hypothesis probability = 4.811262e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.12339 (-0.331364 0.345732)
R^2/D10^2 : 11.5178 (-2.26275 2.82413)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.557e-08 8.385e-09
25- 50 1.354e-07 8.550e-09
50-150 2.388e-08 3.910e-09
15-150 2.548e-07 1.365e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 25.1611 (-2.27032 2.55898)
Norm : 63.9683 (-7.35596 8.37769)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.176e-07 8.050e-09
25- 50 1.211e-07 6.400e-09
50-150 5.197e-08 7.705e-09
15-150 2.907e-07 1.400e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.81306 (-0.851281 0.664609)
R1^2/D10^2 : 23.2990 (-7.60857 15.978)
kT2 [keV] : 14.5107 (-3.90082 6.84632)
R2^2/D10^2 : 0.188701 (-0.15959 0.867721)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.082e-07 1.546e-08
25- 50 1.250e-07 2.428e-08
50-150 5.289e-08 2.471e-08
15-150 2.861e-07 5.395e-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: 2.84906 ( -0.0889335 0.091486 )
Norm@50keV : 6.58483E-02 ( -0.0040951 0.00406518 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 89.43 using 59 PHA bins.
# Reduced chi-squared = 1.569 for 57 degrees of freedom
# Null hypothesis probability = 3.911736e-03
Photon flux (15-150 keV) in 0.42 sec: 16.2635 ( -0.824128 0.827096 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.11259e-07 ( -1.44191e-08 1.44239e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.23333 ( -0.619095 0.538455 )
Epeak [keV] : 17.9534 ( -9.93244 5.47077 )
Norm@50keV : 0.623143 ( -0.329475 0.875471 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.19 using 59 PHA bins.
# Reduced chi-squared = 0.9856 for 56 degrees of freedom
# Null hypothesis probability = 5.053160e-01
Photon flux (15-150 keV) in 0.42 sec: 15.2199 ( -0.8764 0.8807 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.86042e-07 ( -1.54123e-08 1.56332e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.202292 ( -1.22442 1.99829 )
beta : -3.50291 ( -0.391753 0.262374 )
Epeak [keV] : 22.7586 ( -4.31897 2.46698 )
Norm@50keV : 3.23879 ( -5.4897 101.435 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.64 using 59 PHA bins.
# Reduced chi-squared = 0.8845 for 55 degrees of freedom
# Null hypothesis probability = 7.145526e-01
Photon flux (15-150 keV) in 0.42 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) = 1.05e-07
S(50-100 keV) = 5.80e-08
T90 vs. Hardness ratio plot
T90 = 0.335999965667725 sec.
Hardness ratio (energy fluence ratio) = 0.552381
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.814949
Count Ratio (50-100 keV) / (15-25 keV) = 0.178879
Mask shadow pattern
IMX = 2.994253074577944E-01, IMY = -1.587597296404664E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.032000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.032000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.032000
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:
-239.892000 -106.843700
-105.892000 -0.004000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9956 -15.6022 0.9 27.4 -75.8 6.9234 12.8 2.5 Sco X-1
256.0302 -37.7989 2.9 21.4 -135.3 1.7101 4.0 3.4 4U 1700-377
256.4333 -36.4666 3.3 20.2 -133.1 1.4718 3.5 2.6 GX 349+2
263.0977 -24.6660 6.4 9.5 -101.3 0.6984 1.8 6.8 GX 1+4
264.9398 -44.4805 19.3 23.2 -160.0 -0.2308 -0.6 8.6 4U 1735-44
268.2198 -1.3142 0.0 21.5 -8.5 0.3991 0.9 12.2 SW J1753.5-0127
270.3100 -25.1037 2.1 3.8 -132.8 2.1389 5.5 2.0 GX 5-1
270.1923 -25.8996 6.2 4.5 -138.8 0.7330 1.8 11.1 GRS 1758-258
273.8801 -14.0189 4.6 8.3 10.0 1.0054 2.5 7.4 GX 17+2
275.9402 -30.4960 4.8 8.6 168.5 0.8926 2.4 7.8 H1820-303
284.9181 -24.8282 4.1 11.1 110.4 1.0797 2.8 8.5 HT1900.1-2455
288.9218 10.9948 5.0 36.7 31.5 -1.5926 -2.3 7.9 GRS 1915+105
262.9574 -33.8095 2.9 14.6 -139.3 1.7270 4.0 2.2 GX 354-0
277.0686 20.6127 3.7 43.1 10.4 1.9931 3.1 ------ UNKNOWN
274.9350 -54.1677 2.3 31.9 -177.0 2.4683 5.0 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-0.004000 0.416000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.8101 -15.7668 0.0 27.5 -76.3 -0.0340 -1.4 12.4 Sco X-1
256.0274 -37.8122 14.6 21.4 -135.4 -0.0147 -0.8 2.7 4U 1700-377
256.6184 -36.3671 5.5 20.1 -133.1 0.0372 2.1 9.5 GX 349+2
263.1707 -24.5954 0.0 9.4 -101.0 0.0102 0.6 12.6 GX 1+4
264.5407 -44.2981 0.0 23.1 -159.2 0.0262 1.5 12.6 4U 1735-44
268.4985 -1.2920 0.0 21.5 -7.7 -0.0051 -0.3 12.4 SW J1753.5-0127
270.4378 -24.9197 0.0 3.6 -132.1 -0.0273 -1.7 12.7 GX 5-1
270.3134 -25.8925 5.1 4.4 -139.9 -0.0376 -2.3 9.0 GRS 1758-258
274.1595 -14.0357 7.7 8.3 11.9 0.0242 1.5 8.9 GX 17+2
276.1147 -30.4995 0.0 8.6 167.6 -0.0139 -0.8 12.6 H1820-303
285.2048 -24.9286 3.7 11.4 110.7 0.0539 3.1 9.2 HT1900.1-2455
288.6894 11.0858 5.9 36.7 31.1 -0.0547 -2.0 10.6 GRS 1915+105
263.1290 -33.9841 4.8 14.6 -140.2 -0.0411 -2.4 11.4 GX 354-0
280.3438 -4.9354 0.3 18.7 27.9 0.7327 42.2 ------ UNKNOWN
275.2534 -58.5527 2.2 36.3 -176.9 0.1131 5.2 ------ UNKNOWN
267.1436 -53.6696 2.6 31.7 -168.2 0.0876 4.5 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
627.508600 643.150000
660.108000 696.408600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.6883 -60.6613 18.7 45.5 -53.4 0.2655 0.6 11.2 Cen X-3
186.5925 -62.7868 45.1 44.2 -42.5 -0.0585 -0.3 2.0 GX 301-2
264.6412 -44.3251 11.7 53.3 19.7 0.4700 1.0 8.7 4U 1735-44
268.6337 -48.5567 1.9 48.3 21.1 1.5273 6.2 ------ UNKNOWN
Plot creation:
Wed Aug 21 16:50:54 EDT 2024