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
231.4193 -0.5478 0.0178 18.2 -15.6 0.1078 10.9 TRIG_01285677
------------------------------------------
Foreground time interval of the image:
-0.020 0.564 (delta_t = 0.584 [sec])
Background time interval of the image:
-239.696 -56.730 (delta_t = 182.966 [sec])
-55.696 -0.020 (delta_t = 55.676 [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 0.064000
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 0.064000
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 0.064000
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 -0.020 sec. to 0.564 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.45031 ( -0.27183 0.28145 )
Norm@50keV : 1.07810E-02 ( -0.00177181 0.00175706 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.83 using 59 PHA bins.
# Reduced chi-squared = 1.067 for 57 degrees of freedom
# Null hypothesis probability = 3.398837e-01
Photon flux (15-150 keV) in 0.584 sec: 1.32872 ( -0.216052 0.216502 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.0246e-08 ( -1.08503e-08 1.09587e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.020 sec. to 0.564 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.09212 ( -1.22133 0.618425 )
Epeak [keV] : 138.344 ( -138.351 -138.351 )
Norm@50keV : 1.59511E-02 ( -0.00679202 0.0409657 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.47 using 59 PHA bins.
# Reduced chi-squared = 1.080 for 56 degrees of freedom
# Null hypothesis probability = 3.176094e-01
Photon flux (15-150 keV) in 0.584 sec: 1.31138 ( -0.22246 0.22168 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.95335e-08 ( -1.11812e-08 1.11982e-08 ) ergs/cm2
Band function
Time interval is from -0.020 sec. to 0.564 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.08880 ( -0.603461 1.05571 )
beta : -10.0000 ( 10 20 )
Epeak [keV] : 136.398 ( -64.383 -136.583 )
Norm@50keV : 1.60578E-02 ( -0.00689125 0.0408876 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.47 using 59 PHA bins.
# Reduced chi-squared = 1.099 for 55 degrees of freedom
# Null hypothesis probability = 2.848610e-01
Photon flux (15-150 keV) in 0.584 sec: 1.31266 ( ) 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] : 17.4374 (-3.34151 4.09437)
R^2/D10^2 : 9.30325E-02 (-0.0475661 0.0979854)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.99 using 59 PHA bins.
# Reduced chi-squared = 1.210 for 57 degrees of freedom
# Null hypothesis probability = 1.325680e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.340e-09 1.138e-09
25- 50 1.508e-08 3.834e-09
50-150 3.299e-08 1.053e-08
15-150 5.141e-08 1.294e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-80.6826 -199.363)
Norm : 5.47339 (-0.874592 0.874613)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.959e-09 4.579e-09
25- 50 1.531e-08 8.620e-09
50-150 3.358e-08 1.902e-08
15-150 5.685e-08 3.200e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.60112 (-2.27513 4.19243)
R1^2/D10^2 : 18.6902 (-17.3298 26209)
kT2 [keV] : 21.3646 (-4.8134 8.68239)
R2^2/D10^2 : 4.29756E-02 (-0.0304252 0.036414)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.976e-09 3.976e-09
25- 50 1.270e-08 4.299e-09
50-150 3.802e-08 1.685e-08
15-150 5.870e-08 2.444e-08
Peak spectrum fit
Power-law model
Time interval is from -0.226 sec. to 0.774 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.32564 ( -0.382201 0.384007 )
Norm@50keV : 5.70171E-03 ( -0.00125292 0.00125098 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.90 using 59 PHA bins.
# Reduced chi-squared = 1.209 for 57 degrees of freedom
# Null hypothesis probability = 1.342116e-01
Photon flux (15-150 keV) in 1 sec: 0.683586 ( -0.154113 0.154637 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.59991e-08 ( -1.34785e-08 1.36458e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.226 sec. to 0.774 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.814854 ( -2.03974 1.66996 )
Epeak [keV] : 129.816 ( -129.611 -129.611 )
Norm@50keV : 9.78915E-03 ( -0.00524618 0.0642036 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.56 using 59 PHA bins.
# Reduced chi-squared = 1.224 for 56 degrees of freedom
# Null hypothesis probability = 1.209084e-01
Photon flux (15-150 keV) in 1 sec: 0.668810 ( -0.16187 0.160396 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.49264e-08 ( -1.40133e-08 1.40494e-08 ) ergs/cm2
Band function
Time interval is from -0.226 sec. to 0.774 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.793236 ( -0.714346 2.01858 )
beta : -9.37088 ( 9.37154 19.3715 )
Epeak [keV] : 130.066 ( -63.2079 -130.05 )
Norm@50keV : 9.87976E-03 ( -0.0047036 0.0286006 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.57 using 59 PHA bins.
# Reduced chi-squared = 1.247 for 55 degrees of freedom
# Null hypothesis probability = 1.033465e-01
Photon flux (15-150 keV) in 1 sec: 0.684931 ( ) 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] : 18.6958 (-4.45308 6.23605)
R^2/D10^2 : 3.89566E-02 (-0.0241688 0.0585562)
(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 2.692e-09 1.320e-09
25- 50 1.280e-08 5.287e-09
50-150 3.277e-08 1.477e-08
15-150 4.826e-08 1.972e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-90.0804 -199.363)
Norm : 2.84099 (-0.627024 0.627023)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.074e-09 4.266e-09
25- 50 1.361e-08 8.065e-09
50-150 2.985e-08 1.754e-08
15-150 5.053e-08 2.904e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.75092 (-1.49706 6.56202)
R1^2/D10^2 : 1116.34 (-1307.11 -1307.35)
kT2 [keV] : 20.3596 (-4.93634 7.54718)
R2^2/D10^2 : 2.83266E-02 (-0.021716 0.037126)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.218e-09 2.536e-09
25- 50 1.137e-08 6.449e-09
50-150 3.488e-08 1.824e-08
15-150 5.147e-08 2.580e-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: 1.45031 ( -0.27183 0.28145 )
Norm@50keV : 1.07810E-02 ( -0.00177181 0.00175706 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.83 using 59 PHA bins.
# Reduced chi-squared = 1.067 for 57 degrees of freedom
# Null hypothesis probability = 3.398837e-01
Photon flux (15-150 keV) in 0.584 sec: 1.32872 ( -0.216052 0.216502 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.0246e-08 ( -1.08503e-08 1.09587e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.09212 ( -1.22133 0.618425 )
Epeak [keV] : 138.344 ( -138.351 -138.351 )
Norm@50keV : 1.59511E-02 ( -0.00679202 0.0409657 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.47 using 59 PHA bins.
# Reduced chi-squared = 1.080 for 56 degrees of freedom
# Null hypothesis probability = 3.176094e-01
Photon flux (15-150 keV) in 0.584 sec: 1.31138 ( -0.22246 0.22168 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.95335e-08 ( -1.11812e-08 1.11982e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.08880 ( -0.603461 1.05571 )
beta : -10.0000 ( 10 20 )
Epeak [keV] : 136.398 ( -64.383 -136.583 )
Norm@50keV : 1.60578E-02 ( -0.00689125 0.0408876 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.47 using 59 PHA bins.
# Reduced chi-squared = 1.099 for 55 degrees of freedom
# Null hypothesis probability = 2.848610e-01
Photon flux (15-150 keV) in 0.584 sec: 1.31266 ( ) 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) = 1.45e-08
S(50-100 keV) = 2.13e-08
T90 vs. Hardness ratio plot
T90 = 0.483999967575073 sec.
Hardness ratio (energy fluence ratio) = 1.46897
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.47906
Count Ratio (50-100 keV) / (15-25 keV) = 1.27675
Mask shadow pattern
IMX = 3.173604674822915E-01, IMY = 8.888159855939244E-02
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.064000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.064000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.064000
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:
-239.696000 -56.729700
-55.696000 -0.020000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9677 -15.6151 0.7 35.9 -38.3 7.4266 16.1 1.6 Sco X-1
254.4581 35.3490 2.2 27.0 -151.1 1.9083 5.2 0.4 Her X-1
268.4651 -1.3801 3.6 41.1 -81.9 -4.0725 -3.2 7.3 SW J1753.5-0127
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-0.020000 0.564000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9489 -15.5614 5.1 35.8 -38.3 -0.0312 -2.3 5.0 Sco X-1
254.5431 35.1566 4.0 26.9 -150.6 -0.0310 -2.9 11.9 Her X-1
268.3604 -1.5086 4.8 41.1 -81.7 -0.1019 -2.4 3.4 SW J1753.5-0127
231.4192 -0.5478 1.1 18.2 -15.6 0.1083 10.9 ------ UNKNOWN
224.3979 -39.6231 2.3 57.7 -9.3 0.2432 5.1 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
61.504600 89.004000
90.304000 962.343900
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9657 -15.6397 0.6 20.2 -58.9 28.2170 20.1 0.8 Sco X-1
254.4100 35.3262 5.0 41.8 -169.4 4.3963 2.3 2.5 Her X-1
255.8106 -37.9736 5.7 43.7 -46.1 6.4040 2.0 11.4 4U 1700-377
256.3756 -36.5519 11.8 42.8 -47.9 2.8104 1.0 8.3 GX 349+2
263.1520 -24.8217 14.1 39.1 -67.2 2.4986 0.8 9.0 GX 1+4
268.5008 -1.5309 16.4 37.1 -106.2 2.2810 0.7 9.2 SW J1753.5-0127
262.8464 -33.7479 9.6 44.4 -56.3 6.1543 1.2 8.8 GX 354-0
204.2434 40.0341 3.0 47.5 133.7 19.8473 3.8 ------ UNKNOWN
227.8070 -56.1945 2.3 55.7 -15.6 15.6858 5.1 ------ UNKNOWN
237.3219 -49.3679 2.7 49.1 -23.1 11.0450 4.3 ------ UNKNOWN
Plot creation:
Wed Jan 29 16:52:46 EST 2025