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
263.2523 -33.6981 0.0194 9.8 52.1 0.2646 9.9 TRIG_01215687
------------------------------------------
Foreground time interval of the image:
-1.476 2.728 (delta_t = 4.204 [sec])
Background time interval of the image:
-35.935 -1.476 (delta_t = 34.459 [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 1.024000
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 1.024000
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 1.024000
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 -1.476 sec. to 2.728 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 4.22104 ( -0.644234 0.736173 )
Norm@50keV : 7.26787E-04 ( -0.000383591 0.00057684 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.28 using 59 PHA bins.
# Reduced chi-squared = 0.8996 for 57 degrees of freedom
# Null hypothesis probability = 6.887015e-01
Photon flux (15-150 keV) in 4.204 sec: 0.544924 ( -0.08882 0.0889469 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.94035e-08 ( -1.51642e-08 1.62652e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -1.476 sec. to 2.728 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 7.64119E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 101.59 using 59 PHA bins.
# Reduced chi-squared = 1.8142 for 56 degrees of freedom
# Null hypothesis probability = 1.868758e-04
Photon flux (15-150 keV) in 4.204 sec: 0.543836 ( -0.088617 0.090048 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.88578e-08 ( -1.52778e-08 1.23539e-08 ) ergs/cm2
Band function
Time interval is from -1.476 sec. to 2.728 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.86525 ( 1.02739 1.02739 )
beta : -4.56841 ( 4.43516 0.806608 )
Epeak [keV] : 12.8436 ( -5.72257 131.398 )
Norm@50keV : 1.14584E+04 ( -11460.5 1.46644e+07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.47 using 59 PHA bins.
# Reduced chi-squared = 0.9176 for 55 degrees of freedom
# Null hypothesis probability = 6.481651e-01
Photon flux (15-150 keV) in 4.204 sec: 0.227517 ( 6.77248 -0.227517 ) 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] : 3.20288 (-0.475733 0.574638)
R^2/D10^2 : 50.1908 (-31.4353 89.4183)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.55 using 59 PHA bins.
# Reduced chi-squared = 0.9220 for 57 degrees of freedom
# Null hypothesis probability = 6.424276e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.857e-08 2.540e-08
25- 50 1.067e-08 5.638e-09
50-150 2.872e-11 2.823e-11
15-150 6.926e-08 3.764e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.04325 (-1.69137 2.59182)
Norm : 42.1972 (-22.5715 52.4404)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.688e-08 2.049e-08
25- 50 1.427e-08 7.241e-09
50-150 3.235e-10 3.201e-10
15-150 7.148e-08 2.590e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.97851 (-0.47307 0.549418)
R1^2/D10^2 : 74.4435 (-47.9675 154.527)
kT2 [keV] : 20.8615 (-9.13506 26.6623)
R2^2/D10^2 : 4.82314E-03 (-0.00442899 0.0299671)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.762e-08 3.119e-08
25- 50 1.651e-08 8.618e-09
50-150 2.776e-08 1.785e-08
15-150 1.019e-07 5.383e-08
Peak spectrum fit
Power-law model
Time interval is from 0.312 sec. to 1.312 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 4.23526 ( -0.868534 1.04786 )
Norm@50keV : 1.12040E-03 ( -0.000745316 0.00132362 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.69 using 59 PHA bins.
# Reduced chi-squared = 1.135 for 57 degrees of freedom
# Null hypothesis probability = 2.260109e-01
Photon flux (15-150 keV) in 1 sec: 0.850810 ( -0.174428 0.174289 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.94365e-08 ( -7.30959e-09 8.24945e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.312 sec. to 1.312 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 1.28695E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 95.13 using 59 PHA bins.
# Reduced chi-squared = 1.699 for 56 degrees of freedom
# Null hypothesis probability = 8.584841e-04
Photon flux (15-150 keV) in 1 sec: 0.842636 0.849894 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.92538e-08 ( -7.1349e-09 8.2848e-09 ) ergs/cm2
Band function
Time interval is from 0.312 sec. to 1.312 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -2.66755 ( 2.66759 2.66759 )
beta : -4.23438 ( -1.04875 0.867578 )
Epeak [keV] : 0.808161 ( -0.808161 -0.808161 )
Norm@50keV : 1.22076 ( -1.22095 75.9757 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.69 using 59 PHA bins.
# Reduced chi-squared = 1.176 for 55 degrees of freedom
# Null hypothesis probability = 1.742741e-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] : 3.00822 (-0.593564 0.792603)
R^2/D10^2 : 113.250 (-113.521 374.37)
(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 2.153e-08 1.189e-08
25- 50 3.169e-09 2.023e-09
50-150 5.219e-12 6.150e-12
15-150 2.471e-08 1.394e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 6.72915 (-2.11603 3.81941)
Norm : 73.5926 (-48.2421 165.546)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.099e-08 1.104e-08
25- 50 4.855e-09 3.071e-09
50-150 9.278e-11 1.014e-10
15-150 2.594e-08 1.441e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.76335 (-0.564995 0.710172)
R1^2/D10^2 : 184.588 (-140.557 712.918)
kT2 [keV] : 23.3135 (-11.2088 31.8456)
R2^2/D10^2 : 6.79383E-03 (-0.00633917 0.0593947)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.100e-08 1.157e-08
25- 50 5.838e-09 3.234e-09
50-150 1.475e-08 1.024e-08
15-150 4.159e-08 2.230e-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: 4.22104 ( -0.644234 0.736173 )
Norm@50keV : 7.26787E-04 ( -0.000383591 0.00057684 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.28 using 59 PHA bins.
# Reduced chi-squared = 0.8996 for 57 degrees of freedom
# Null hypothesis probability = 6.887015e-01
Photon flux (15-150 keV) in 4.204 sec: 0.544924 ( -0.08882 0.0889469 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.94035e-08 ( -1.51642e-08 1.62652e-08 ) 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 : 7.64119E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 101.59 using 59 PHA bins.
# Reduced chi-squared = 1.8142 for 56 degrees of freedom
# Null hypothesis probability = 1.868758e-04
Photon flux (15-150 keV) in 4.204 sec: 0.543836 ( -0.088617 0.090048 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.88578e-08 ( -1.52778e-08 1.23539e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.86525 ( 1.02739 1.02739 )
beta : -4.56841 ( 4.43516 0.806608 )
Epeak [keV] : 12.8436 ( -5.72257 131.398 )
Norm@50keV : 1.14584E+04 ( -11460.5 1.46644e+07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.47 using 59 PHA bins.
# Reduced chi-squared = 0.9176 for 55 degrees of freedom
# Null hypothesis probability = 6.481651e-01
Photon flux (15-150 keV) in 4.204 sec: 0.227517 ( 6.77248 -0.227517 ) 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) = 2.02e-08
S(50-100 keV) = 4.33e-09
T90 vs. Hardness ratio plot
T90 = 3.93999993801117 sec.
Hardness ratio (energy fluence ratio) = 0.214356
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.178996
Count Ratio (50-100 keV) / (15-25 keV) = 0.148041
Mask shadow pattern
IMX = 1.057429292120399E-01, IMY = -1.360598019319241E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
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:
-35.935400 -1.476000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
245.1647 -15.5327 0.0 28.4 109.7 0.0418 0.3 12.5 Sco X-1
256.0342 -37.7651 4.4 16.9 50.1 -0.2650 -2.6 5.3 4U 1700-377
256.5962 -36.5587 10.6 15.9 53.1 -0.1128 -1.1 11.2 GX 349+2
263.0275 -24.5983 4.2 9.3 109.3 0.2486 2.8 8.9 GX 1+4
264.9604 -44.3171 0.0 17.3 17.8 0.1612 1.8 12.3 4U 1735-44
268.3043 -1.3621 3.7 27.1 169.5 -0.3049 -3.1 6.6 SW J1753.5-0127
270.4529 -24.9937 6.1 3.7 146.7 0.1602 1.9 10.5 GX 5-1
270.4328 -25.7564 5.7 3.1 139.1 0.1762 2.0 7.1 GRS 1758-258
274.1559 -13.9990 5.6 14.2 -174.9 0.1759 2.1 9.0 GX 17+2
275.8755 -30.2373 8.2 3.5 -53.6 0.1219 1.4 8.2 H1820-303
284.8626 -24.8389 10.0 11.4 -104.9 -0.1054 -1.1 10.6 HT1900.1-2455
288.6576 11.0723 6.9 42.2 -157.1 -0.2391 -1.7 11.2 GRS 1915+105
263.0960 -33.7101 7.0 9.9 52.5 0.1519 1.6 9.2 GX 354-0
245.9274 15.4505 2.1 50.7 145.0 2.1270 5.4 ------ UNKNOWN
275.0822 12.1321 2.8 40.3 -177.2 0.5231 4.1 ------ UNKNOWN
294.8843 26.2135 2.2 58.4 -157.4 2.6032 5.2 ------ UNKNOWN
313.1608 -9.7726 2.6 42.2 -108.6 1.7276 4.5 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-1.476000 2.728000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
245.0990 -15.7943 0.0 28.3 109.1 -0.0794 -1.9 11.5 Sco X-1
256.1417 -38.0165 10.7 16.9 49.2 0.0319 1.1 12.7 4U 1700-377
256.2819 -36.2508 0.0 16.0 54.5 -0.0551 -1.8 12.7 GX 349+2
262.8793 -24.7776 4.5 9.4 107.9 0.0716 2.5 7.3 GX 1+4
264.7516 -44.5685 7.1 17.6 18.0 0.0441 1.6 7.1 4U 1735-44
268.2267 -1.5998 6.9 26.9 169.3 0.0503 1.7 12.2 SW J1753.5-0127
270.2127 -25.1145 3.5 3.7 142.9 0.0913 3.3 4.4 GX 5-1
270.3380 -25.8305 5.5 3.1 137.0 -0.0601 -2.1 5.6 GRS 1758-258
274.1556 -14.0760 6.1 14.1 -174.9 -0.0502 -1.9 9.0 GX 17+2
275.8957 -30.5171 21.3 3.7 -50.2 -0.0149 -0.5 9.1 H1820-303
284.9026 -24.7820 14.9 11.5 -105.1 -0.0207 -0.8 11.0 HT1900.1-2455
288.6598 11.0581 6.3 42.2 -157.1 0.0717 1.8 10.6 GRS 1915+105
263.1844 -33.7031 0.0 9.8 52.3 0.2478 9.2 12.5 GX 354-0
269.5026 18.6106 2.4 46.9 175.0 0.2754 4.9 ------ UNKNOWN
291.2819 28.3694 2.5 59.3 -161.8 0.7772 4.7 ------ UNKNOWN
295.1977 15.4188 2.6 48.7 -151.4 0.2819 4.3 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
61.564590 131.594000
133.064000 216.634000
218.064000 243.994000
245.064000 247.824000
249.064000 302.084000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.8933 -15.6832 26.0 24.5 135.6 -0.2255 -0.4 5.6 Sco X-1
255.9238 -37.9366 7.8 7.3 55.3 -0.6029 -1.5 6.3 4U 1700-377
256.6242 -36.3065 6.0 6.0 65.4 0.7987 1.9 11.5 GX 349+2
262.9900 -24.8690 6.0 8.9 -179.0 -0.7502 -1.9 7.5 GX 1+4
264.7447 -44.4488 96.4 10.8 -2.9 0.0510 0.1 0.1 4U 1735-44
268.3257 -1.5033 8.7 32.6 -167.9 0.6260 1.3 4.0 SW J1753.5-0127
270.4282 -24.9166 0.0 10.8 -140.2 0.5635 1.5 12.5 GX 5-1
270.4683 -25.7397 23.1 10.1 -137.4 0.1944 0.5 9.0 GRS 1758-258
274.1522 -14.0423 14.7 22.0 -148.1 0.3203 0.8 8.5 GX 17+2
275.7817 -30.5361 0.0 11.1 -100.6 -0.8768 -1.9 12.6 H1820-303
284.9200 -24.8892 17.3 20.8 -106.7 -0.3012 -0.7 6.6 HT1900.1-2455
288.6143 11.0894 0.0 50.9 -144.5 -0.6509 -0.5 13.9 GRS 1915+105
263.0925 -33.9810 6.4 0.3 32.7 -0.7796 -1.8 10.2 GX 354-0
265.5125 -89.0259 2.6 55.3 2.6 7.8199 4.5 ------ UNKNOWN
269.1810 -32.2814 2.3 5.2 -101.9 2.1073 5.0 ------ UNKNOWN
Plot creation:
Sat Feb 17 18:11:13 EST 2024