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
260.2126 -37.2308 0.0665 18.9 100.1 -1.1196 -2.9 TRIG_01217799
------------------------------------------
Foreground time interval of the image:
-9.000 72.301 (delta_t = 81.301 [sec])
Background time interval of the image:
-19.499 -9.000 (delta_t = 10.499 [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
8 ms binning
From T100_start-3 s to T100_start+3 s
2 ms binning
From T100_start-1 s to T100_start+1 s
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 -9.000 sec. to 120.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.91507 ( -0.29599 0.329544 )
Norm@50keV : 5.58422E-04 ( -0.000140186 0.000146495 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.28 using 59 PHA bins.
# Reduced chi-squared = 0.9172 for 57 degrees of freedom
# Null hypothesis probability = 6.525237e-01
Photon flux (15-150 keV) in 129 sec: 0.144472 ( -0.0176184 0.0176223 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.33415e-07 ( -1.24972e-07 1.31408e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -9.000 sec. to 120.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 2.57329E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 96.34 using 59 PHA bins.
# Reduced chi-squared = 1.720 for 56 degrees of freedom
# Null hypothesis probability = 6.516003e-04
Photon flux (15-150 keV) in 129 sec: 0.139698 ( -0.017694 0.017971 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.29808e-07 ( -1.14321e-07 1.70323e-07 ) ergs/cm2
Band function
Time interval is from -9.000 sec. to 120.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.778458 ( 0.741323 0.741323 )
beta : -3.53374 ( 3.53743 0.754277 )
Epeak [keV] : 15.2826 ( -15.7282 6.94058 )
Norm@50keV : 2.04627E-02 ( -0.0253891 715.464 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.65 using 59 PHA bins.
# Reduced chi-squared = 0.9027 for 55 degrees of freedom
# Null hypothesis probability = 6.785382e-01
Photon flux (15-150 keV) in 129 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] : 5.59183 (-0.708685 0.799366)
R^2/D10^2 : 0.713252 (-0.324382 0.62485)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.96 using 59 PHA bins.
# Reduced chi-squared = 0.9467 for 57 degrees of freedom
# Null hypothesis probability = 5.897634e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.430e-07 7.592e-08
25- 50 2.923e-07 6.998e-08
50-150 1.987e-08 1.169e-08
15-150 6.552e-07 1.207e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 18.9938 (-4.38566 6.17089)
Norm : 1.85122 (-0.534271 0.814736)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.541e-07 5.657e-08
25- 50 2.977e-07 6.005e-08
50-150 8.164e-08 4.265e-08
15-150 7.334e-07 1.216e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 36.6795 (-35.2915 -36.6796)
R1^2/D10^2 : 1.52445E-04 (-0.000151007 0.361204)
kT2 [keV] : 5.23881 (-3.85031 0.862434)
R2^2/D10^2 : 0.925058 (-0.45775 979.267)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.586e-07 1.928e-07
25- 50 2.925e-07 1.454e-07
50-150 7.632e-08 4.647e-08
15-150 7.274e-07 3.663e-07
Peak spectrum fit
Power-law model
Time interval is from 90.000 sec. to 91.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.93270 ( -1.88284 3.23959 )
Norm@50keV : 4.67463E-04 ( -0.000467163 0.00165205 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.12 using 59 PHA bins.
# Reduced chi-squared = 0.9495 for 57 degrees of freedom
# Null hypothesis probability = 5.837195e-01
Photon flux (15-150 keV) in 1 sec: 0.271865 ( -0.16017 0.170484 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.80774e-09 ( -6.43431e-09 1.07079e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 90.000 sec. to 91.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -9.84248 ( 9.87297 11.7421 )
Epeak [keV] : 17.1645 ( -4.36232 5.03871 )
Norm@50keV : 2.00377E+08 ( -2.3789e+08 1.38467e+10 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.87 using 59 PHA bins.
# Reduced chi-squared = 0.9440 for 56 degrees of freedom
# Null hypothesis probability = 5.942537e-01
Photon flux (15-150 keV) in 1 sec: 0.276508 0.277750 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 7.35224e-17 ( 0 0 ) ergs/cm2
Band function
Time interval is from 90.000 sec. to 91.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.03731 ( 1.68667 1.68667 )
beta : -9.16282 ( 8.54774 6.35492 )
Epeak [keV] : 6.53944 ( -6.53944 12.6729 )
Norm@50keV : 0.139512 ( -0.14032 8.73744e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.71 using 59 PHA bins.
# Reduced chi-squared = 0.9766 for 55 degrees of freedom
# Null hypothesis probability = 5.238978e-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] : 3.42213 (-1.41464 2.2767)
R^2/D10^2 : 17.4543 (-17.4616 491.929)
(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 7.068e-09 4.568e-09
25- 50 1.596e-09 1.146e-09
50-150 6.985e-12 7.350e-12
15-150 8.671e-09 5.510e-09
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.75225 (-4.6197 20.3122)
Norm : 16.5277 (-16.5014 285.606)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.667e-09 4.165e-09
25- 50 1.968e-09 1.525e-09
50-150 6.246e-11 8.650e-11
15-150 8.697e-09 5.615e-09
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.35217 (-1.38729 2.17451)
R1^2/D10^2 : 19.3652 (-17.9354 494.772)
kT2 [keV] : 155.622 (-157.419 -157.419)
R2^2/D10^2 : 4.90471E-05 (-4.89429e-05 -4.89429e-05)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.035e-09 4.193e-09
25- 50 1.881e-09 1.144e-09
50-150 9.281e-09 1.131e-09
15-150 1.820e-08 5.660e-09
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: 2.90757 ( -0.362082 0.419326 )
Norm@50keV : 5.56414E-04 ( -0.000176629 0.000187194 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.84 using 59 PHA bins.
# Reduced chi-squared = 0.8392 for 57 degrees of freedom
# Null hypothesis probability = 8.011358e-01
Photon flux (15-150 keV) in 81.3 sec: 0.143188 ( -0.0219069 0.0219279 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.21666e-07 ( -1.00157e-07 1.06985e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.11721 ( )
Epeak [keV] : 14.1575 ( )
Norm@50keV : 1.04164E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.09 using 59 PHA bins.
# Reduced chi-squared = 0.8230 for 56 degrees of freedom
# Null hypothesis probability = 8.249005e-01
Photon flux (15-150 keV) in 81.3 sec: 0.139127 ( -0.021628 0.021614 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.57499e-07 ( -8.72414e-08 1.27333e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.878405 ( 0.840823 0.840823 )
beta : -3.73150 ( 3.73949 1.04108 )
Epeak [keV] : 15.2398 ( -15.7833 7.76958 )
Norm@50keV : 1.62907E-02 ( -0.0204242 1026.87 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.87 using 59 PHA bins.
# Reduced chi-squared = 0.8340 for 55 degrees of freedom
# Null hypothesis probability = 8.049517e-01
Photon flux (15-150 keV) in 81.3 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) = 2.79e-07
S(50-100 keV) = 1.48e-07
T90 vs. Hardness ratio plot
T90 = 96 sec.
Hardness ratio (energy fluence ratio) = 0.530466
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.625282
Count Ratio (50-100 keV) / (15-25 keV) = 0.0668984
Mask shadow pattern
IMX = -6.020699315770721E-02, IMY = -3.378180717343277E-01
TIME vs. PHA plot around the trigger time
TIME vs. DetID plot around the trigger time
100 us light curve (15-350 keV)
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:
-19.499400 -9.000000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
245.0262 -15.7650 4.7 40.9 127.3 -0.3303 -2.4 8.0 Sco X-1
255.7885 -37.9787 0.0 22.3 96.4 0.0754 1.3 12.4 4U 1700-377
256.6153 -36.5538 9.9 21.9 100.5 0.0626 1.2 11.7 GX 349+2
263.1614 -24.5841 0.0 22.3 136.1 0.0952 1.8 12.8 GX 1+4
264.9409 -44.3002 0.0 15.8 75.5 -0.0302 -0.7 12.4 4U 1735-44
268.2624 -1.5575 5.2 39.2 169.7 -0.1501 -2.2 8.9 SW J1753.5-0127
270.1950 -24.9422 3.7 17.6 149.0 -0.1355 -3.1 9.5 GX 5-1
270.1624 -25.9134 0.0 16.8 146.8 0.0310 0.7 12.7 GRS 1758-258
273.8910 -14.1867 11.7 25.4 171.7 0.0471 1.0 11.2 GX 17+2
275.9205 -30.3844 1901.8 10.1 150.9 -0.0002 -0.0 1.1 H1820-303
285.1782 -24.8397 4.8 13.1 -160.5 -0.0977 -2.4 9.1 HT1900.1-2455
288.7348 11.0529 9.3 49.2 -158.6 -0.1362 -1.2 7.4 GRS 1915+105
262.8292 -33.9399 5.8 17.7 111.9 0.0984 2.0 10.2 GX 354-0
234.0750 -33.4376 3.0 40.4 96.1 0.7714 3.9 ------ UNKNOWN
239.4827 -20.4418 2.6 42.2 116.9 0.8054 4.5 ------ UNKNOWN
260.1676 -37.1073 2.1 19.0 100.5 0.2898 5.6 ------ UNKNOWN
280.1626 20.3429 2.4 58.4 -169.0 1.2061 4.8 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-9.000000 72.300600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
245.0074 -15.5094 7.5 41.1 127.6 -1.6080 -1.5 8.0 Sco X-1
255.7885 -37.9787 0.0 22.3 96.4 -0.5510 -1.3 12.4 4U 1700-377
256.6177 -36.5027 4.4 21.9 100.6 -1.0618 -2.7 10.0 GX 349+2
262.8710 -24.8541 5.0 22.3 135.1 0.9282 2.3 9.9 GX 1+4
264.9410 -44.3002 0.0 15.8 75.5 0.2748 0.8 12.4 4U 1735-44
268.2898 -1.5712 7.1 39.2 169.8 0.8249 1.6 8.5 SW J1753.5-0127
270.1746 -24.9452 5.2 17.6 148.9 0.7627 2.2 10.0 GX 5-1
270.4820 -25.8670 0.0 16.7 147.7 0.6347 1.8 12.2 GRS 1758-258
273.8770 -14.1092 9.6 25.5 171.7 -0.4355 -1.2 8.7 GX 17+2
275.9709 -30.2068 5.3 10.3 151.7 -0.7077 -2.2 9.9 H1820-303
285.2153 -24.9536 6.1 13.0 -160.3 0.5998 1.9 10.0 HT1900.1-2455
288.7894 11.0410 7.0 49.2 -158.6 1.3325 1.6 5.8 GRS 1915+105
262.8141 -33.9495 5.1 17.7 111.9 -0.8466 -2.3 11.1 GX 354-0
277.5111 8.4203 2.7 46.8 -173.6 2.5959 4.3 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
125.500600 191.820000
193.000000 193.310000
194.000000 195.480000
197.000000 197.261500
199.000000 199.700000
201.000000 202.190600
203.000000 203.290000
205.000000 243.048500
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
186.7908 -62.8705 16.0 50.2 34.1 -0.6348 -0.7 7.0 GX 301-2
245.0642 -15.5013 5.5 25.3 143.7 -0.5140 -2.1 9.7 Sco X-1
256.1664 -38.0017 0.0 3.3 71.3 0.5253 2.4 12.7 4U 1700-377
256.4277 -36.3396 5.1 3.0 101.8 0.4861 2.3 5.0 GX 349+2
263.1667 -24.5941 0.0 12.7 -167.9 -0.2099 -1.0 12.5 GX 1+4
264.9596 -44.5925 0.0 8.4 -25.0 0.3599 1.7 12.6 4U 1735-44
268.4939 -1.4818 73.4 36.4 -166.4 0.0449 0.2 7.8 SW J1753.5-0127
270.4402 -25.0156 13.9 14.9 -141.4 -0.1862 -0.8 9.3 GX 5-1
270.3134 -25.5939 6.3 14.4 -140.5 0.4147 1.8 9.0 GRS 1758-258
273.8459 -13.9349 11.2 26.2 -149.1 0.2464 1.0 11.1 GX 17+2
275.9696 -30.4285 3.1 14.7 -112.7 -0.8570 -3.8 4.4 H1820-303
285.1860 -24.8552 5.9 24.6 -113.1 0.5290 1.9 9.1 HT1900.1-2455
263.0740 -33.8501 12.4 4.0 -142.7 0.2052 0.9 4.3 GX 354-0
228.2328 -0.4080 2.2 47.0 133.2 4.9073 5.2 ------ UNKNOWN
201.1759 -67.3513 2.7 44.4 27.5 1.5653 4.3 ------ UNKNOWN
246.5230 -15.8775 0.9 24.4 146.2 3.4102 13.5 ------ UNKNOWN
256.9420 5.8478 2.2 43.0 174.8 2.2627 5.4 ------ UNKNOWN
259.5191 17.7630 2.8 54.8 178.7 3.4509 4.1 ------ UNKNOWN
259.8419 -37.0392 1.4 0.2 92.3 1.7662 8.1 ------ UNKNOWN
266.3718 -35.9246 2.0 5.2 -101.3 1.2453 5.8 ------ UNKNOWN
277.2999 16.0609 2.3 55.5 -160.4 4.1580 5.0 ------ UNKNOWN
UNKNOWN
Plot creation:
Wed Feb 28 16:09:35 EST 2024