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
238.7715 -54.0856 0.0285 0.0 171.1 0.0172 6.7 TRIG_01057131
------------------------------------------
Foreground time interval of the image:
-0.004 0.012 (delta_t = 0.016 [sec])
Background time interval of the image:
-60.192 -0.004 (delta_t = 60.188 [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 0.008000
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 0.008000
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 0.008000
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 0.012 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.67881 ( -0.488924 0.615318 )
Norm@50keV : 3.05123E-02 ( -0.013326 0.0134304 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 51.76 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 6.71e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 0.016 sec: 6.71525 ( -1.80967 1.80977 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.15618e-09 ( -1.60088e-09 1.68406e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.004 sec. to 0.012 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.41012 ( -5.4983 3.20643 )
Epeak [keV] : 28.6635 ( -19.0875 6.69456 )
Norm@50keV : 13.5743 ( -16.2186 46638.1 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 47.21 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 7.92e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 0.016 sec: 6.75278 ( -1.78221 1.78533 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.86717e-09 ( -1.33637e-09 1.35846e-09 ) ergs/cm2
Band function
Time interval is from -0.004 sec. to 0.012 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.70536 ( -3.19263 -1.43437 )
beta : -10.0000 ( 10 0 )
Epeak [keV] : 29.3435 ( -5.99461 5.83307 )
Norm@50keV : 20.1346 ( -17.0125 2499.55 )
------------------------------------------------------------
Photon flux (15-150 keV) in 0.016 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] : 7.45859 (-1.52342 1.51871)
R^2/D10^2 : 11.2155 (-6.245 16.9727)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 47.10 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.22e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.705e-09 7.829e-10
25- 50 2.632e-09 1.220e-09
50-150 5.458e-10 4.256e-10
15-150 4.883e-09 2.156e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 26.1375 (-9.70915 16.7965)
Norm : 64.2158 (-26.2405 45.0011)
------------------------------------------------------------
#Fit statistic : Chi-Squared 49.31 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 7.56e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.935e-09 7.026e-10
25- 50 2.040e-09 8.490e-10
50-150 9.252e-10 6.966e-10
15-150 4.900e-09 2.290e-09
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 0.809103 (-0.799458 3.28617)
R1^2/D10^2 : 7.23535E+07 (-1.06665e+08 1.58506e+13)
kT2 [keV] : 7.62755 (-1.5539 1.58299)
R2^2/D10^2 : 9.97159 (-5.88447 14.4847)
------------------------------------------------------------
#Fit statistic : Chi-Squared 46.42 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 7.88e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.672e-09 9.936e-10
25- 50 2.600e-09 1.565e-09
50-150 5.820e-10 4.575e-10
15-150 4.854e-09 2.862e-09
Peak spectrum fit
Power-law model
Time interval is from -0.494 sec. to 0.506 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.72442 ( -1.58776 -2.70032 )
Norm@50keV : 7.24560E-04 ( -0.000726425 0.00125396 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 64.36 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 2.35e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 0.164526 ( -0.148691 0.149676 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.73386e-09 ( -7.8907e-09 1.03254e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.494 sec. to 0.506 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -9.79336 ( 9.83446 11.9288 )
Epeak [keV] : 29.8925 ( -11.542 33.6345 )
Norm@50keV : 1.40317E+05 ( -168160 4.3972e+07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 63.04 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 2.41e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 0.158554 0.157290 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 7.10462e-09 ( -5.3179e-09 8.19638e-09 ) ergs/cm2
Band function
Time interval is from -0.494 sec. to 0.506 sec.
Parameter 3 is pegged at 6.88905 due to zero or negative pivot element, likely
caused by the fit being insensitive to the parameter.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.86464 ( -6.85619 -4.86464 )
beta : -9.37155 ( 9.37155 19.354 )
Epeak [keV] : 29.3110 ( -14.16 20.5382 )
Norm@50keV : 78.5042 ( )
------------------------------------------------------------
Photon flux (15-150 keV) in 1 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] : 7.22059 (-4.34171 7.65669)
R^2/D10^2 : 0.332522 (-0.330754 16.6594)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 63.33 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 2.63e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.873e-09 1.989e-09
25- 50 4.175e-09 3.211e-09
50-150 7.731e-10 7.325e-10
15-150 7.821e-09 5.285e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 25.8611 (-25.3038 -25.3038)
Norm : 1.64806 (-1.65252 65.2105)
------------------------------------------------------------
#Fit statistic : Chi-Squared 63.84 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 2.49e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.084e-09 2.314e-09
25- 50 3.229e-09 2.499e-09
50-150 1.442e-09 1.526e-09
15-150 7.756e-09 6.545e-09
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 0.423538 (-7.24612 -7.24612)
R1^2/D10^2 : 2.56399E+12 (-2.90894e+12 4.09925e+16)
kT2 [keV] : 7.54452 (-4.42966 8.91973)
R2^2/D10^2 : 0.266293 (-0.259467 11.3364)
------------------------------------------------------------
#Fit statistic : Chi-Squared 63.15 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 2.11e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.876e-09 6.335e-02
25- 50 4.178e-09 5.275e-01
50-150 7.730e-10 1.355e+01
15-150 7.827e-09 1.331e+01
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: 2.67881 ( -0.488924 0.615318 )
Norm@50keV : 3.05123E-02 ( -0.013326 0.0134304 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 51.76 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 6.71e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 0.016 sec: 6.71525 ( -1.80967 1.80977 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.15618e-09 ( -1.60088e-09 1.68406e-09 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.41012 ( -5.4983 3.20643 )
Epeak [keV] : 28.6635 ( -19.0875 6.69456 )
Norm@50keV : 13.5743 ( -16.2186 46638.1 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 47.21 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 7.92e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 0.016 sec: 6.75278 ( -1.78221 1.78533 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.86717e-09 ( -1.33637e-09 1.35846e-09 ) ergs/cm2
Band function
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.70536 ( -3.19263 -1.43437 )
beta : -10.0000 ( 10 2.13163e-14 )
Epeak [keV] : 29.3435 ( -5.99461 5.83307 )
Norm@50keV : 20.1346 ( -17.0125 1998.93 )
------------------------------------------------------------
Photon flux (15-150 keV) in 0.016 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) = 1.73e-09
S(50-100 keV) = 1.08e-09
T90 vs. Hardness ratio plot
T90 = 0.0119999647140503 sec.
Hardness ratio (energy fluence ratio) = 0.624277
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.17734
Count Ratio (50-100 keV) / (15-25 keV) = 0.159417
Mask shadow pattern
IMX = -1.657289115721856E-04, IMY = -2.585411986132202E-05
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.008000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.008000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.008000
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:
-60.192000 -0.004000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.2944 -60.7472 5.6 35.7 -87.0 0.6261 2.1 7.5 Cen X-3
186.6174 -62.6364 4.8 27.8 -87.0 0.4071 2.4 8.1 GX 301-2
244.9824 -15.6447 1.0 38.7 51.5 3.3204 11.1 0.3 Sco X-1
256.0394 -38.0273 8.8 19.9 85.3 0.1900 1.3 11.3 4U 1700-377
256.1838 -36.4643 0.0 21.3 83.4 -0.3626 -2.4 12.4 GX 349+2
262.9934 -24.9082 5.4 34.3 83.3 0.6171 2.2 9.8 GX 1+4
264.5050 -44.5251 6.0 19.2 112.6 -0.2632 -1.9 11.1 4U 1735-44
270.3172 -25.2108 10.9 37.1 93.6 -0.3748 -1.1 8.1 GX 5-1
270.3237 -25.5838 9.1 36.8 93.9 0.4258 1.3 9.6 GRS 1758-258
275.9411 -30.4014 9.8 35.6 105.4 0.3222 1.2 2.2 H1820-303
263.0165 -33.8441 24.1 26.5 91.9 0.0850 0.5 1.5 GX 354-0
331.1891 -58.5664 2.1 47.3 176.8 1.3694 5.5 ------ UNKNOWN
207.0991 -26.5824 2.4 36.0 -11.1 0.7010 4.8 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-0.004000 0.012000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.0231 -60.7060 18.1 35.9 -87.0 0.0044 0.6 9.9 Cen X-3
186.6615 -62.6930 3.8 27.8 -87.1 -0.0120 -3.0 4.6 GX 301-2
245.1828 -15.6508 7.8 38.8 51.8 0.0094 1.5 11.8 Sco X-1
256.1635 -37.8913 6.7 20.1 85.3 0.0051 1.7 8.8 4U 1700-377
256.4275 -36.2359 8.6 21.6 83.5 -0.0041 -1.3 11.2 GX 349+2
262.9934 -24.7610 24.7 34.4 83.2 0.0028 0.5 1.3 GX 1+4
264.8654 -44.4877 4.1 19.4 113.0 0.0080 2.8 5.7 4U 1735-44
270.3268 -25.1945 3.8 37.2 93.6 0.0236 3.0 7.3 GX 5-1
270.4383 -25.7667 5.8 36.7 94.2 0.0146 2.0 7.5 GRS 1758-258
276.0568 -30.4182 6.8 35.7 105.6 -0.0099 -1.7 7.5 H1820-303
262.9364 -33.9149 22.1 26.4 91.9 0.0021 0.5 5.5 GX 354-0
230.9753 -27.8767 2.1 26.8 26.5 0.0159 5.5 ------ UNKNOWN
238.7725 -54.0846 1.7 0.0 164.1 0.0173 6.8 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
Plot creation:
Tue Jun 22 21:33:31 EDT 2021