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
299.1704 +35.2692 0.0351 21.2 -176.5 1.2159 5.5 TRIG_01218967
------------------------------------------
Foreground time interval of the image:
-22.368 27.560 (delta_t = 49.928 [sec])
29.000 71.301 (delta_t = 42.301 [sec])
Background time interval of the image:
-60.000 -55.198 (delta_t = 4.802 [sec])
-54.000 -22.368 (delta_t = 31.632 [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
Multiple GTIs in the spectrum
tstart tstop
-22.368000 27.560000
29.000000 203.872000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.80935 ( -0.0749223 0.0756047 )
Norm@50keV : 2.28497E-03 ( -9.4811e-05 9.43857e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.37 using 59 PHA bins.
# Reduced chi-squared = 0.9538 for 57 degrees of freedom
# Null hypothesis probability = 5.744099e-01
Photon flux (15-150 keV) in 224.8 sec: 0.316012 ( -0.0130919 0.0131278 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.72732e-06 ( -1.99475e-07 2.00258e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-22.368000 27.560000
29.000000 203.872000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.63163 ( -0.303054 0.232983 )
Epeak [keV] : 100.189 ( -36.1186 -100.196 )
Norm@50keV : 2.81805E-03 ( -0.000603282 0.00117947 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.24 using 59 PHA bins.
# Reduced chi-squared = 0.9508 for 56 degrees of freedom
# Null hypothesis probability = 5.798198e-01
Photon flux (15-150 keV) in 224.8 sec: 0.312169 ( -0.01436 0.014385 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.65242e-06 ( -2.34242e-07 2.33297e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-22.368000 27.560000
29.000000 203.872000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.966883 ( 0.100168 0.100168 )
beta : -1.85439 ( 1.85548 0.0933074 )
Epeak [keV] : 26.1675 ( -29.3001 37.2966 )
Norm@50keV : 0.276509 ( -0.275074 214.163 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.08 using 59 PHA bins.
# Reduced chi-squared = 0.9470 for 55 degrees of freedom
# Null hypothesis probability = 5.867537e-01
Photon flux (15-150 keV) in 224.8 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 4.64309e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 12.5975 ( )
R^2/D10^2 : 6.00493E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 207.41 using 59 PHA bins.
# Reduced chi-squared = 3.6387 for 57 degrees of freedom
# Null hypothesis probability = 5.881542e-19
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.543e-07 3.260e-08
25- 50 1.512e-06 6.856e-08
50-150 1.488e-06 1.288e-07
15-150 3.454e-06 1.551e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 107.464 (-15.8758 21.0055)
Norm : 1.34847 (-0.0786547 0.0856101)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.920e-07 6.025e-08
25- 50 1.389e-06 7.520e-08
50-150 2.342e-06 6.098e-07
15-150 4.523e-06 6.362e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.65250 (-0.846525 0.903136)
R1^2/D10^2 : 0.456163 (-0.162541 0.29329)
kT2 [keV] : 24.1992 (-3.37519 4.90995)
R2^2/D10^2 : 4.06321E-03 (-0.00199541 0.00319143)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.839e-07 1.016e-07
25- 50 1.381e-06 1.225e-07
50-150 2.415e-06 4.621e-07
15-150 4.580e-06 4.946e-07
Peak spectrum fit
Power-law model
Time interval is from 106.764 sec. to 107.764 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.02637 ( -0.385056 0.440878 )
Norm@50keV : 4.66608E-03 ( -0.00138295 0.00132117 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 78.22 using 59 PHA bins.
# Reduced chi-squared = 1.372 for 57 degrees of freedom
# Null hypothesis probability = 3.257825e-02
Photon flux (15-150 keV) in 1 sec: 0.708534 ( -0.153927 0.153928 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.30964e-08 ( -1.14355e-08 1.19919e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 106.764 sec. to 107.764 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.38619 ( -2.0802 0.751518 )
Epeak [keV] : 39.1283 ( )
Norm@50keV : 1.11572E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 77.68 using 59 PHA bins.
# Reduced chi-squared = 1.387 for 56 degrees of freedom
# Null hypothesis probability = 2.917726e-02
Photon flux (15-150 keV) in 1 sec: 0.697352 ( -0.155192 0.078202 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.0637e-08 ( -1.17732e-08 1.31799e-08 ) ergs/cm2
Band function
Time interval is from 106.764 sec. to 107.764 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.38422 ( -1.19823 2.32258 )
beta : -10.0000 ( 10 3.55271e-15 )
Epeak [keV] : 39.1101 ( -27.2534 -39.1101 )
Norm@50keV : 1.11877E-02 ( -0.0111877 0.199446 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 77.68 using 59 PHA bins.
# Reduced chi-squared = 1.412 for 55 degrees of freedom
# Null hypothesis probability = 2.367977e-02
Photon flux (15-150 keV) in 1 sec: 0.703091 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 4.06757e-08 ( 0 0 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.47557 (-2.44492 3.13454)
R^2/D10^2 : 0.408943 (-0.269986 0.86892)
(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 7.325e-09 4.067e-09
25- 50 1.684e-08 6.433e-09
50-150 7.505e-09 4.349e-09
15-150 3.167e-08 1.188e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 62.0080 (-28.8092 81.5282)
Norm : 3.69263 (-1.1101 1.68477)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.328e-09 3.004e-09
25- 50 1.434e-08 4.416e-09
50-150 1.676e-08 1.114e-08
15-150 4.043e-08 1.667e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.11491 (-2.79599 3.60704)
R1^2/D10^2 : 2.95196 (-2.55921 112.959)
kT2 [keV] : 16.9518 (-14.6259 33.9921)
R2^2/D10^2 : 3.09625E-02 (-0.0312439 0.248332)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.669e-09 5.675e-09
25- 50 1.343e-08 7.085e-09
50-150 1.666e-08 1.054e-08
15-150 3.976e-08 2.145e-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: 1.65991 ( -0.107253 0.108283 )
Norm@50keV : 2.31449E-03 ( -0.000142541 0.000141722 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.73 using 59 PHA bins.
# Reduced chi-squared = 0.8024 for 57 degrees of freedom
# Null hypothesis probability = 8.577663e-01
Photon flux (15-150 keV) in 92.23 sec: 0.303211 ( -0.018291 0.0183347 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.98338e-06 ( -1.29367e-07 1.30186e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.55506 ( -0.427409 0.203286 )
Epeak [keV] : 205.883 ( -205.937 -205.937 )
Norm@50keV : 2.62248E-03 ( -0.000606767 0.00168656 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.53 using 59 PHA bins.
# Reduced chi-squared = 0.8131 for 56 degrees of freedom
# Null hypothesis probability = 8.399157e-01
Photon flux (15-150 keV) in 92.23 sec: 0.301477 ( -0.01935 0.019299 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.96596e-06 ( -1.47273e-07 1.4279e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.24712 ( 1.17547 1.17547 )
beta : -1.74465 ( 1.74552 0.179729 )
Epeak [keV] : 69.2682 ( -63.8735 -63.8735 )
Norm@50keV : 4.06825E-03 ( -0.00182672 176.151 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.09 using 59 PHA bins.
# Reduced chi-squared = 0.8198 for 55 degrees of freedom
# Null hypothesis probability = 8.274205e-01
Photon flux (15-150 keV) in 92.23 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) = 1.34e-06
S(50-100 keV) = 1.52e-06
T90 vs. Hardness ratio plot
T90 = 204.031999826431 sec.
Hardness ratio (energy fluence ratio) = 1.13433
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.12937
Count Ratio (50-100 keV) / (15-25 keV) = 0.689193
Mask shadow pattern
IMX = -3.877468266728697E-01, IMY = 2.392547724977371E-02
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:
-60.000000 -55.197800
-54.000000 -22.368000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.6206 35.2204 0.0 36.5 109.4 0.3951 1.9 10.8 Her X-1
263.1196 -24.6300 40.3 48.0 13.7 0.0587 0.3 9.2 GX 1+4
268.4657 -1.6410 0.0 27.1 32.4 0.1594 1.4 12.7 SW J1753.5-0127
270.3417 -25.1336 4.5 45.1 5.5 0.4078 2.6 4.5 GX 5-1
270.2402 -25.5886 6.2 45.5 5.4 0.3017 1.9 9.9 GRS 1758-258
274.1187 -14.0952 5.5 33.6 8.3 0.2399 2.1 7.5 GX 17+2
276.0267 -30.4175 17.1 48.1 -3.6 0.1242 0.7 6.1 H1820-303
285.1125 -24.7863 7.0 40.9 -13.2 0.2140 1.6 9.1 HT1900.1-2455
288.7731 11.1125 9.8 4.9 -12.4 -0.1072 -1.2 10.1 GRS 1915+105
299.4462 35.1684 0.8 21.2 -175.8 1.3589 15.2 7.3 Cyg X-1
308.1276 41.0316 16.2 29.9 -169.9 -0.0713 -0.7 4.8 Cyg X-3
326.0088 38.2448 5.3 39.1 -151.1 -0.2938 -2.2 8.9 Cyg X-2
263.0831 -33.8723 5.3 55.7 7.3 -1.0303 -2.2 5.2 GX 354-0
247.6501 2.4517 3.2 43.2 57.1 1.2388 3.7 ------ UNKNOWN
306.4131 -12.5594 2.3 33.1 -50.7 0.6624 5.1 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-22.368000 27.560000
29.000000 71.300590
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.6171 35.2203 20.2 36.5 109.4 -0.2903 -0.6 10.7 Her X-1
262.9261 -24.6257 61.7 48.1 13.9 0.1037 0.2 8.5 GX 1+4
268.3843 -1.6124 6.7 27.2 32.5 -0.4501 -1.7 9.6 SW J1753.5-0127
270.3693 -25.1053 4.6 45.0 5.5 -1.0346 -2.5 4.9 GX 5-1
270.2464 -25.5627 8.2 45.5 5.4 -0.5944 -1.4 11.2 GRS 1758-258
274.0118 -14.0154 7.5 33.6 8.6 -0.4188 -1.5 1.3 GX 17+2
275.7769 -30.4125 7.9 48.2 -3.3 0.6722 1.5 8.1 H1820-303
285.0315 -24.8899 3.8 41.0 -13.1 -0.9626 -3.0 1.9 HT1900.1-2455
288.9388 10.8870 11.1 5.1 -14.5 -0.2226 -1.0 9.0 GRS 1915+105
299.6745 35.0930 2.6 21.3 -175.2 -0.9736 -4.4 7.7 Cyg X-1
308.2793 40.9153 5.2 29.9 -169.6 0.5349 2.2 8.0 Cyg X-3
326.0138 38.2413 4.5 39.1 -151.1 0.8670 2.6 8.9 Cyg X-2
263.0345 -33.9103 9.7 55.8 7.3 1.4995 1.2 5.1 GX 354-0
246.8553 15.5670 2.2 40.8 76.4 4.6244 5.2 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
131.500600 243.092500
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.5329 35.2076 15.1 36.3 71.8 -0.4160 -0.8 8.9 Her X-1
268.2839 -1.3618 152.9 46.7 13.6 -0.0277 -0.1 7.4 SW J1753.5-0127
274.0152 -14.2075 0.0 54.9 -1.1 0.9777 1.6 10.3 GX 17+2
288.6618 10.9810 3.9 26.1 -7.2 0.5999 2.9 8.3 GRS 1915+105
299.3808 35.2097 0.7 0.1 -117.4 2.9407 15.4 10.3 Cyg X-1
308.3856 40.9827 0.0 9.2 -163.2 -0.1765 -0.9 12.6 Cyg X-3
326.0257 38.2321 4.4 21.5 -137.5 0.5654 2.6 8.7 Cyg X-2
5.8715 52.6491 2.3 49.0 -164.1 2.3155 4.9 ------ UNKNOWN
299.2234 -9.0947 2.3 44.3 -31.4 1.8314 5.0 ------ UNKNOWN
Plot creation:
Thu Mar 7 07:09:59 EST 2024