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
244.5626 -15.5791 0.0789 46.8 -19.3 1.1248 2.4 TRIG_01218081
------------------------------------------
Foreground time interval of the image:
11.832 103.001 (delta_t = 91.169 [sec])
Background time interval of the image:
-15.499 11.832 (delta_t = 27.331 [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 96.000000
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 96.000000
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 96.000000
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 11.832 sec. to 143.824 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 6.09181 ( -0.418288 0.432715 )
Norm@50keV : 1.73890E-04 ( -5.8303e-05 7.93486e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.66 using 59 PHA bins.
# Reduced chi-squared = 1.082 for 57 degrees of freedom
# Null hypothesis probability = 3.130157e-01
Photon flux (15-150 keV) in 132 sec: 0.784834 ( -0.0755339 0.0761781 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.0976e-06 ( -2.74412e-07 2.75793e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 11.832 sec. to 143.824 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 3.32709E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 365.28 using 59 PHA bins.
# Reduced chi-squared = 6.5229 for 56 degrees of freedom
# Null hypothesis probability = 5.953264e-47
Photon flux (15-150 keV) in 132 sec: 0.767078 ( -0.081444 0.080326 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.00992e-06 ( -2.9832e-07 2.94994e-07 ) ergs/cm2
Band function
Time interval is from 11.832 sec. to 143.824 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.61313 ( )
beta : -7.42767 ( )
Epeak [keV] : 8.41900 ( )
Norm@50keV : 9.83889E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 227.04 using 59 PHA bins.
# Reduced chi-squared = 4.1279 for 55 degrees of freedom
# Null hypothesis probability = 8.986420e-23
Photon flux (15-150 keV) in 132 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] : 2.61339 (-0.202346 0.229769)
R^2/D10^2 : 264.222 (-127.859 246.296)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.19 using 59 PHA bins.
# Reduced chi-squared = 1.126 for 57 degrees of freedom
# Null hypothesis probability = 2.391930e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.625e-06 5.584e-07
25- 50 2.301e-07 5.623e-08
50-150 1.112e-10 7.937e-11
15-150 2.855e-06 6.745e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 4.60343 (-0.516065 0.618377)
Norm : 236.555 (-98.2074 172.689)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.666e-06 5.003e-07
25- 50 2.777e-07 6.105e-08
50-150 9.330e-10 6.328e-10
15-150 2.944e-06 4.937e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.64420 (-0.202346 0.22977)
R1^2/D10^2 : 14.2779 (-127.84 246.315)
kT2 [keV] : 1.85805 (-1.73341 0.768395)
R2^2/D10^2 : 2646.64 (-2281.75 -2615.75)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Peak spectrum fit
Power-law model
Time interval is from 45.136 sec. to 46.136 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.62504 ( -0.815181 1.10116 )
Norm@50keV : 3.20917E-03 ( -0.00214265 0.00303043 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.81 using 59 PHA bins.
# Reduced chi-squared = 1.155 for 57 degrees of freedom
# Null hypothesis probability = 1.982287e-01
Photon flux (15-150 keV) in 1 sec: 1.43805 ( -0.361042 0.361767 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.46276e-08 ( -1.6672e-08 1.88763e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 45.136 sec. to 46.136 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 2.16646E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 84.02 using 59 PHA bins.
# Reduced chi-squared = 1.500 for 56 degrees of freedom
# Null hypothesis probability = 9.063967e-03
Photon flux (15-150 keV) in 1 sec: 1.43570 ( -0.36161 0.36495 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.41882e-08 ( -1.84078e-08 1.93095e-08 ) ergs/cm2
Band function
Time interval is from 45.136 sec. to 46.136 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -6.47951 ( 11.2148 6.47951 )
beta : -3.62506 ( -1.09821 0.814687 )
Epeak [keV] : 39.9259 ( -39.9259 -39.9259 )
Norm@50keV : 0.436163 ( -0.291207 0.411887 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.81 using 59 PHA bins.
# Reduced chi-squared = 1.197 for 55 degrees of freedom
# Null hypothesis probability = 1.508531e-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] : 4.17020 (-1.01615 1.18645)
R^2/D10^2 : 29.5305 (-29.5305 106.949)
(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 3.275e-08 1.877e-08
25- 50 1.329e-08 8.555e-09
50-150 2.068e-10 1.999e-10
15-150 4.625e-08 2.711e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.1709 (-3.84276 7.28222)
Norm : 47.2215 (-27.9744 94.395)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.271e-08 1.859e-08
25- 50 1.440e-08 9.358e-09
50-150 1.034e-09 1.005e-09
15-150 4.814e-08 2.873e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.97710 (-1.03321 1.13267)
R1^2/D10^2 : 36.7069 (-18.3528 88.7718)
kT2 [keV] : 39.2701 (-25.2274 -39.3313)
R2^2/D10^2 : 1.62495E-03 (-0.00160832 0.0281832)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.279e-08 1.908e-08
25- 50 1.375e-08 8.275e-09
50-150 2.090e-08 1.258e-08
15-150 6.745e-08 3.651e-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: 6.04011 ( -0.461467 0.482606 )
Norm@50keV : 1.87435E-04 ( -6.97971e-05 9.87444e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.12 using 59 PHA bins.
# Reduced chi-squared = 1.037 for 57 degrees of freedom
# Null hypothesis probability = 3.978948e-01
Photon flux (15-150 keV) in 91.17 sec: 0.803067 ( -0.0811543 0.0816201 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.19464e-06 ( -2.07369e-07 2.07818e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 3.81799E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 311.57 using 59 PHA bins.
# Reduced chi-squared = 5.5638 for 56 degrees of freedom
# Null hypothesis probability = 3.855818e-37
Photon flux (15-150 keV) in 91.17 sec: 0.787531 ( -0.086532 0.085253 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.13485e-06 ( -2.16155e-07 2.19984e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -8.70031 ( 5.51763 8.70031 )
beta : -6.10549 ( -0.433153 0.519137 )
Epeak [keV] : 361.592 ( -361.592 -361.592 )
Norm@50keV : 2.39090E-02 ( -0.00847336 0.0145649 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.18 using 59 PHA bins.
# Reduced chi-squared = 1.076 for 55 degrees of freedom
# Null hypothesis probability = 3.256525e-01
Photon flux (15-150 keV) in 91.17 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) = 3.61e-07
S(50-100 keV) = 2.11e-08
T90 vs. Hardness ratio plot
T90 = 50.9359998703003 sec.
Hardness ratio (energy fluence ratio) = 0.0584488
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.101653
Count Ratio (50-100 keV) / (15-25 keV) = -0.0191417
Mask shadow pattern
IMX = 1.004195257953159E+00, IMY = 3.508252309884719E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 96.000000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 96.000000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 96.000000
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:
-15.499400 11.832000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.8617 -15.6127 4.3 47.0 -19.6 0.3720 2.7 7.0 Sco X-1
254.3862 35.2554 4.6 34.1 -101.8 0.3284 2.5 6.3 Her X-1
188.4231 8.4547 2.4 31.5 84.8 0.5693 4.8 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
11.832000 103.000590
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.8701 -15.6723 6.2 47.0 -19.5 -0.8615 -1.9 6.6 Sco X-1
254.3340 35.2762 8.6 34.1 -101.8 -0.5871 -1.3 7.2 Her X-1
177.6924 9.0367 2.2 40.7 94.1 4.5106 5.1 ------ UNKNOWN
212.3122 48.5081 2.2 25.8 -170.5 1.2809 5.3 ------ UNKNOWN
259.2263 -11.4589 2.4 53.4 -36.6 5.0972 4.9 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
199.600600 243.113800
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.8102 -15.7094 0.8 0.1 -77.1 1.4880 14.6 10.6 Sco X-1
254.5622 35.2935 6.3 51.8 -178.9 0.5440 1.9 5.9 Her X-1
256.0105 -37.8690 11.0 24.3 -31.2 0.1160 1.1 1.9 4U 1700-377
256.2674 -36.5182 12.2 23.3 -33.3 0.1062 0.9 9.9 GX 349+2
262.8899 -24.5997 6.5 19.2 -68.6 0.2285 1.8 10.9 GX 1+4
264.8509 -44.4104 7.2 33.4 -35.7 -0.2313 -1.6 5.2 4U 1735-44
268.5107 -1.4864 3.8 27.4 -128.0 -0.4009 -3.0 8.8 SW J1753.5-0127
270.4470 -25.1324 7.2 25.9 -73.5 0.2449 1.7 9.4 GX 5-1
270.3657 -25.6325 14.3 25.9 -72.4 -0.1395 -0.9 7.5 GRS 1758-258
274.1527 -14.1753 5.7 28.5 -98.2 -0.3379 -2.0 11.9 GX 17+2
275.8687 -30.2410 7.1 32.0 -66.6 0.2870 1.6 8.1 H1820-303
284.9559 -24.8116 292.1 38.7 -78.8 -0.0146 -0.0 7.9 HT1900.1-2455
262.8114 -33.8781 5.8 24.5 -47.7 0.2454 2.0 9.2 GX 354-0
213.3543 0.7796 2.3 35.1 106.0 1.1122 5.1 ------ UNKNOWN
228.2648 -41.9587 2.4 29.9 15.8 0.6135 4.7 ------ UNKNOWN
259.0495 -22.2987 2.8 15.1 -70.9 0.4747 4.1 ------ UNKNOWN
Plot creation:
Fri Mar 1 14:49:45 EST 2024