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
255.2257 -38.1175 0.0339 18.8 -119.9 0.0696 5.7 TRIG_01219916
------------------------------------------
Foreground time interval of the image:
-131.584 -130.744 (delta_t = 0.840 [sec])
Background time interval of the image:
-239.000 -219.450 (delta_t = 19.550 [sec])
-218.000 -181.540 (delta_t = 36.460 [sec])
-180.000 -131.584 (delta_t = 48.416 [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 64.000000
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 64.000000
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 64.000000
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 -131.584 sec. to -130.744 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.73339 ( -0.690812 0.808666 )
Norm@50keV : 2.90730E-03 ( -0.00143484 0.00135022 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.14 using 59 PHA bins.
# Reduced chi-squared = 0.7217 for 57 degrees of freedom
# Null hypothesis probability = 9.437629e-01
Photon flux (15-150 keV) in 0.84 sec: 0.390740 ( -0.170485 0.170757 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.25568e-08 ( -1.07951e-08 1.11732e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -131.584 sec. to -130.744 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.33417 ( -5.61995 0.914266 )
Epeak [keV] : 79.2948 ( -79.8419 -79.8419 )
Norm@50keV : 4.78904E-03 ( -0.0047292 -0.0047292 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.03 using 59 PHA bins.
# Reduced chi-squared = 0.7326 for 56 degrees of freedom
# Null hypothesis probability = 9.332863e-01
Photon flux (15-150 keV) in 0.84 sec: 0.389702 ( -0.170091 0.170678 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.21995e-08 ( -2.21995e-08 1.13921e-08 ) ergs/cm2
Band function
Time interval is from -131.584 sec. to -130.744 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.31281 ( -6.47672 2.72048 )
beta : -10.0000 ( 10 20 )
Epeak [keV] : 76.3829 ( -58.8337 -76.8557 )
Norm@50keV : 4.95734E-03 ( -0.00493466 73.0527 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.03 using 59 PHA bins.
# Reduced chi-squared = 0.7459 for 55 degrees of freedom
# Null hypothesis probability = 9.193065e-01
Photon flux (15-150 keV) in 0.84 sec: 0.390528 ( ) 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] : 9.17169 (-3.75342 12.3615)
R^2/D10^2 : 0.257293 (-0.256423 1.69945)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.46 using 59 PHA bins.
# Reduced chi-squared = 0.7449 for 57 degrees of freedom
# Null hypothesis probability = 9.243400e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.573e-09 2.347e-09
25- 50 7.821e-09 5.195e-09
50-150 3.160e-09 2.566e-09
15-150 1.455e-08 1.043e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 128.357 (-97.5122 -125.579)
Norm : 1.65911 (-0.764233 1.6239)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.618e-09 2.325e-09
25- 50 6.547e-09 4.195e-09
50-150 1.207e-08 8.765e-09
15-150 2.223e-08 1.557e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.79915 (-4.18667 6.24645)
R1^2/D10^2 : 0.645441 (-0.651451 8.17426)
kT2 [keV] : 31.5585 (-31.185 -31.185)
R2^2/D10^2 : 2.10880E-03 (-0.00219813 0.46422)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.170e-09 2.590e-09
25- 50 6.731e-09 4.431e-09
50-150 1.234e-08 8.320e-09
15-150 2.324e-08 1.401e-08
Peak spectrum fit
Power-law model
Time interval is from -131.664 sec. to -130.664 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.64958 ( -1.43458 1.62126 )
Norm@50keV : 2.01445E-03 ( -0.00201438 0.00129966 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.45 using 59 PHA bins.
# Reduced chi-squared = 0.8325 for 57 degrees of freedom
# Null hypothesis probability = 8.122019e-01
Photon flux (15-150 keV) in 1 sec: 0.263004 ( -0.263004 0.158057 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.87349e-08 ( -1.27544e-08 1.40131e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -131.664 sec. to -130.664 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.03031 ( -5.13795 -2.98947 )
Epeak [keV] : 298.632 ( )
Norm@50keV : 4.26631E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.30 using 59 PHA bins.
# Reduced chi-squared = 0.8446 for 56 degrees of freedom
# Null hypothesis probability = 7.896933e-01
Photon flux (15-150 keV) in 1 sec: 0.263188 ( -0.158235 0.157755 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.86107e-08 ( -1.86107e-08 1.39073e-08 ) ergs/cm2
Band function
Time interval is from -131.664 sec. to -130.664 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -8.28960 ( 6.10336 8.2896 )
beta : -1.64969 ( -1.62249 1.43342 )
Epeak [keV] : 148.375 ( -148.375 -148.375 )
Norm@50keV : 0.273784 ( -0.273782 0.176644 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.45 using 59 PHA bins.
# Reduced chi-squared = 0.8628 for 55 degrees of freedom
# Null hypothesis probability = 7.551766e-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] : 7.28056 (-4.10167 159.24)
R^2/D10^2 : 0.381796 (-0.375164 12.76)
(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 3.380e-09 2.312e-09
25- 50 4.990e-09 3.670e-09
50-150 9.512e-10 1.049e-09
15-150 9.321e-09 7.180e-09
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 198.969 (-199.073 -199.073)
Norm : 1.05059 (-0.633131 3.41805)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.617e-09 1.898e-09
25- 50 5.032e-09 3.555e-09
50-150 1.103e-08 7.525e-09
15-150 1.868e-08 1.301e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.39101 (-3.55032 9.4221)
R1^2/D10^2 : 1.09190 (-1.05617 220.763)
kT2 [keV] : 42.4860 (-43.5253 -43.5253)
R2^2/D10^2 : 8.54285E-04 (-0.000816502 0.439211)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.746e-09 2.568e-09
25- 50 4.105e-09 2.159e-09
50-150 1.374e-08 7.765e-09
15-150 2.159e-08 1.333e-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: 1.73339 ( -0.690812 0.808666 )
Norm@50keV : 2.90730E-03 ( -0.00143484 0.00135022 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.14 using 59 PHA bins.
# Reduced chi-squared = 0.7217 for 57 degrees of freedom
# Null hypothesis probability = 9.437629e-01
Photon flux (15-150 keV) in 0.84 sec: 0.390740 ( -0.170485 0.170757 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.25568e-08 ( -1.07951e-08 1.11732e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.33417 ( -5.62009 0.916169 )
Epeak [keV] : 79.2948 ( -79.8419 -79.8419 )
Norm@50keV : 4.78904E-03 ( -0.0047292 -0.0047292 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.03 using 59 PHA bins.
# Reduced chi-squared = 0.7326 for 56 degrees of freedom
# Null hypothesis probability = 9.332863e-01
Photon flux (15-150 keV) in 0.84 sec: 0.389702 ( -0.170091 0.170678 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.21995e-08 ( -2.21995e-08 1.13921e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.31281 ( -6.47672 2.72048 )
beta : -10.0000 ( 10 3.55271e-15 )
Epeak [keV] : 76.3829 ( -58.8337 -76.8557 )
Norm@50keV : 4.95734E-03 ( -0.00493466 73.0527 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.03 using 59 PHA bins.
# Reduced chi-squared = 0.7459 for 55 degrees of freedom
# Null hypothesis probability = 9.193065e-01
Photon flux (15-150 keV) in 0.84 sec: 0.390528 ( ) 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) = 6.19e-09
S(50-100 keV) = 7.45e-09
T90 vs. Hardness ratio plot
T90 = 0.811999917030334 sec.
Hardness ratio (energy fluence ratio) = 1.20355
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.878977
Count Ratio (50-100 keV) / (15-25 keV) = 0.339973
Mask shadow pattern
IMX = -1.699911458556629E-01, IMY = 2.951305964534986E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
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:
-239.000000 -219.450000
-218.000000 -181.540000
-180.000000 -131.584000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.3597 -60.4962 12.7 38.9 11.2 -0.2419 -0.9 7.7 Cen X-3
186.8576 -62.8080 7.8 31.6 5.1 0.2976 1.5 6.0 GX 301-2
244.8886 -15.5153 14.2 30.4 179.9 -0.1650 -0.8 9.2 Sco X-1
255.8877 -37.8738 7.6 20.8 -125.7 -0.2950 -1.5 5.0 4U 1700-377
256.3455 -36.3253 12.8 21.7 -129.2 -0.1698 -0.9 7.3 GX 349+2
262.8456 -24.8501 0.0 32.8 -143.2 -0.4483 -2.0 10.9 GX 1+4
264.8460 -44.3222 4.5 25.6 -105.2 0.5688 2.6 8.8 4U 1735-44
268.3443 -1.5190 3.9 54.0 -159.8 1.7145 2.9 4.2 SW J1753.5-0127
270.4327 -25.1784 32.2 37.9 -135.2 0.1065 0.4 10.0 GX 5-1
270.3690 -25.7106 7.0 37.5 -134.5 0.4798 1.7 4.1 GRS 1758-258
273.9911 -14.0251 17.8 47.9 -144.0 -0.2811 -0.6 1.1 GX 17+2
276.0957 -30.4478 5.5 39.0 -123.6 0.7414 2.1 10.1 H1820-303
262.9402 -33.7666 10.2 27.7 -128.7 0.2370 1.1 4.8 GX 354-0
248.8868 1.0431 2.2 47.3 176.2 2.2277 5.3 ------ UNKNOWN
92.9634 -79.2293 2.3 55.4 -21.9 2.9083 5.0 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-131.584000 -130.744000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.3158 -60.6230 528.3 41.1 11.9 -0.0004 -0.0 0.0 Cen X-3
186.9172 -62.6706 7.7 33.6 6.5 -0.0198 -1.5 9.3 GX 301-2
245.0513 -15.8240 9.3 28.0 -179.0 0.0144 1.2 11.8 Sco X-1
255.9670 -37.9884 8.5 19.4 -119.8 -0.0168 -1.4 8.7 4U 1700-377
256.2562 -36.3936 5.8 20.1 -124.0 0.0248 2.0 8.8 GX 349+2
263.1399 -24.9228 7.9 31.1 -140.0 0.0199 1.5 12.8 GX 1+4
264.7183 -44.5855 34.4 24.8 -99.3 -0.0049 -0.3 8.2 4U 1735-44
268.3250 -1.3842 14.8 52.0 -158.5 -0.0252 -0.8 4.8 SW J1753.5-0127
270.1448 -24.9122 46.5 36.2 -133.0 -0.0044 -0.2 12.6 GX 5-1
270.3120 -25.7078 10.1 35.8 -131.7 -0.0204 -1.1 2.2 GRS 1758-258
274.0549 -13.9533 39.7 46.1 -142.0 -0.0071 -0.3 5.7 GX 17+2
275.9315 -30.3718 4.7 37.5 -120.7 0.0490 2.4 0.4 H1820-303
262.8155 -33.8169 8.3 26.1 -124.6 0.0182 1.4 8.7 GX 354-0
171.7991 -34.1383 2.8 46.5 49.8 0.1978 4.2 ------ UNKNOWN
234.8934 -7.9517 2.3 33.3 158.2 0.0724 5.1 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
Plot creation:
Thu Mar 14 02:01:23 EDT 2024