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
297.4651 -24.9855 0.0134 19.4 62.0 2.0389 14.4 TRIG_01344586
------------------------------------------
Foreground time interval of the image:
-23.844 33.389 (delta_t = 57.233 [sec])
Background time interval of the image:
-78.711 -23.844 (delta_t = 54.867 [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 2.048000
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 2.048000
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 2.048000
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 -23.844 sec. to 180.816 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.76714 ( -0.158821 0.162449 )
Norm@50keV : 9.51465E-04 ( -9.42042e-05 9.28717e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.59 using 59 PHA bins.
# Reduced chi-squared = 0.8699 for 57 degrees of freedom
# Null hypothesis probability = 7.465681e-01
Photon flux (15-150 keV) in 204.7 sec: 0.129476 ( -0.0114504 0.0114599 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.79555e-06 ( -1.82087e-07 1.84575e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -23.844 sec. to 180.816 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.46236 ( -0.696668 0.315784 )
Epeak [keV] : 78.9181 ( -36.0806 -78.9192 )
Norm@50keV : 1.40098E-03 ( -0.000548571 0.00194837 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.87 using 59 PHA bins.
# Reduced chi-squared = 0.8727 for 56 degrees of freedom
# Null hypothesis probability = 7.391076e-01
Photon flux (15-150 keV) in 204.7 sec: 0.127695 ( -0.012007 0.011973 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.73968e-06 ( -2.12041e-07 2.14755e-07 ) ergs/cm2
Band function
Time interval is from -23.844 sec. to 180.816 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.90209 ( -4.90209 -4.90209 )
beta : -1.84733 ( -0.192837 0.178415 )
Epeak [keV] : 22.0772 ( -10.9534 3.94423 )
Norm@50keV : 236.606 ( -20.575 708701 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.43 using 59 PHA bins.
# Reduced chi-squared = 0.8624 for 55 degrees of freedom
# Null hypothesis probability = 7.558421e-01
Photon flux (15-150 keV) in 204.7 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.75431e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 11.7400 (-1.28196 1.46807)
R^2/D10^2 : 3.32370E-02 (-0.0117671 0.0179731)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 78.72 using 59 PHA bins.
# Reduced chi-squared = 1.381 for 57 degrees of freedom
# Null hypothesis probability = 2.989955e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.979e-07 3.305e-08
25- 50 6.069e-07 6.039e-08
50-150 4.955e-07 1.101e-07
15-150 1.300e-06 1.432e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 99.7588 (-27.0688 64.1889)
Norm : 0.572673 (-0.0721378 0.0735814)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.064e-07 4.022e-08
25- 50 5.295e-07 5.476e-08
50-150 8.570e-07 3.149e-07
15-150 1.693e-06 3.553e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.02123 (-1.56603 1.88679)
R1^2/D10^2 : 0.264012 (-0.157945 0.446099)
kT2 [keV] : 21.4415 (-5.09848 11.6608)
R2^2/D10^2 : 2.73185E-03 (-0.00217228 0.00332133)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.098e-07 1.096e-07
25- 50 5.136e-07 1.612e-07
50-150 8.844e-07 4.792e-07
15-150 1.708e-06 6.288e-07
Peak spectrum fit
Power-law model
Time interval is from 4.240 sec. to 5.240 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.33065 ( -0.308955 0.304482 )
Norm@50keV : 9.35516E-03 ( -0.00154266 0.00154067 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.48 using 59 PHA bins.
# Reduced chi-squared = 0.6576 for 57 degrees of freedom
# Null hypothesis probability = 9.786849e-01
Photon flux (15-150 keV) in 1 sec: 1.12264 ( -0.19162 0.192174 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.17744e-08 ( -1.67644e-08 1.69425e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 4.240 sec. to 5.240 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.32948 ( -0.768401 0.304182 )
Epeak [keV] : 9999.29 ( -9999.35 -9999.35 )
Norm@50keV : 9.39075E-03 ( -0.00154891 0.0119421 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.49 using 59 PHA bins.
# Reduced chi-squared = 0.6695 for 56 degrees of freedom
# Null hypothesis probability = 9.728973e-01
Photon flux (15-150 keV) in 1 sec: 1.12570 ( -0.195155 0.18907 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.17889e-08 ( -1.67703e-08 1.65921e-08 ) ergs/cm2
Band function
Time interval is from 4.240 sec. to 5.240 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.00595 ( 1.00593 6.00134 )
beta : -1.33197 ( 1.33197 0.310019 )
Epeak [keV] : 59.5072 ( -59.5085 -59.5085 )
Norm@50keV : 1.76188E-02 ( -0.00979684 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.48 using 59 PHA bins.
# Reduced chi-squared = 0.6814 for 55 degrees of freedom
# Null hypothesis probability = 9.660148e-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] : 16.8139 (-3.85839 5.68613)
R^2/D10^2 : 8.58170E-02 (-0.0530709 0.124382)
(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 4.956e-09 1.923e-09
25- 50 2.173e-08 6.610e-09
50-150 4.371e-08 1.549e-08
15-150 7.040e-08 1.956e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-71.2474 -200)
Norm : 4.64741 (-0.77291 0.77291)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.157e-08 6.685e-09
25- 50 2.226e-08 1.262e-08
50-150 4.883e-08 2.802e-08
15-150 8.266e-08 4.654e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.80661 (-4.56629 3.73578)
R1^2/D10^2 : 0.427687 (-0.280526 2.84348)
kT2 [keV] : 79.2268 (-58.8642 -84.6165)
R2^2/D10^2 : 8.14336E-04 (-0.000444588 0.0171972)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.700e-09 5.121e-09
25- 50 2.311e-08 1.295e-08
50-150 6.201e-08 3.403e-08
15-150 9.382e-08 4.737e-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: 1.65436 ( -0.14581 0.147572 )
Norm@50keV : 2.21956E-03 ( -0.000192825 0.000191063 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.59 using 59 PHA bins.
# Reduced chi-squared = 0.9753 for 57 degrees of freedom
# Null hypothesis probability = 5.281406e-01
Photon flux (15-150 keV) in 57.23 sec: 0.290237 ( -0.0239452 0.0239748 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.18087e-06 ( -1.08718e-07 1.09853e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.44557 ( -0.601427 0.280814 )
Epeak [keV] : 123.939 ( -63.297 -123.964 )
Norm@50keV : 2.87050E-03 ( -0.000952063 0.00306042 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.16 using 59 PHA bins.
# Reduced chi-squared = 0.9849 for 56 degrees of freedom
# Null hypothesis probability = 5.067555e-01
Photon flux (15-150 keV) in 57.23 sec: 0.287386 ( -0.025032 0.024993 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.15734e-06 ( -1.25402e-07 1.24241e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.92935 ( -4.92935 -4.92935 )
beta : -1.74713 ( -0.177062 0.167748 )
Epeak [keV] : 23.5743 ( -5.69434 4.26714 )
Norm@50keV : 345.780 ( -27.8109 1.5535e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.93 using 59 PHA bins.
# Reduced chi-squared = 0.9623 for 55 degrees of freedom
# Null hypothesis probability = 5.542941e-01
Photon flux (15-150 keV) in 57.23 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.16091e-06 ( -1.16051e-06 -1.12154e-07 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 4.99e-07
S(50-100 keV) = 5.87e-07
T90 vs. Hardness ratio plot
T90 = 193.59199988842 sec.
Hardness ratio (energy fluence ratio) = 1.17635
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.01934
Count Ratio (50-100 keV) / (15-25 keV) = 0.702163
Mask shadow pattern
IMX = 1.654346204700054E-01, IMY = -3.113799681885585E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 2.048000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 2.048000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 2.048000
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:
-78.711400 -23.844000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9885 -15.6703 1.3 47.0 -27.3 2.2522 8.7 1.9 Sco X-1
256.0516 -37.8828 20.6 26.1 -48.6 0.0767 0.6 3.9 4U 1700-377
256.4905 -36.4122 41.3 26.3 -45.2 0.0387 0.3 2.7 GX 349+2
262.9135 -24.6234 7.4 28.9 -17.5 -0.2118 -1.6 9.0 GX 1+4
264.7356 -44.5275 92.9 18.1 -61.5 -0.0158 -0.1 4.7 4U 1735-44
268.4151 -1.3820 151.0 46.1 10.4 0.0170 0.1 5.1 SW J1753.5-0127
270.1808 -25.1857 4.5 24.3 -7.0 0.3329 2.6 8.5 GX 5-1
270.3278 -25.9030 5.0 23.6 -7.8 0.2974 2.3 9.7 GRS 1758-258
274.0119 -14.1217 9.1 32.3 11.1 0.1762 1.3 5.1 GX 17+2
275.9628 -30.5241 5.7 16.9 -4.4 0.2399 2.0 9.6 H1820-303
285.0598 -24.9766 5.7 18.8 27.3 0.2382 2.0 3.6 HT1900.1-2455
263.1038 -33.6905 24.2 22.9 -33.2 0.0556 0.5 10.4 GX 354-0
278.9533 -37.3250 2.4 10.3 -16.7 0.5100 4.7 ------ UNKNOWN
257.0013 -46.2040 2.8 23.3 -67.6 0.5789 4.1 ------ UNKNOWN
49.2192 -71.8849 2.3 57.2 -157.9 2.8367 4.9 ------ UNKNOWN
104.4826 -84.5776 2.8 52.0 -139.8 2.3020 4.1 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-23.844000 33.388600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
245.0693 -15.5070 5.2 47.1 -27.1 0.6350 2.2 9.5 Sco X-1
256.1204 -37.8719 10.5 26.0 -48.5 -0.1651 -1.1 6.6 4U 1700-377
256.5175 -36.2434 7.8 26.4 -44.9 0.2250 1.5 11.5 GX 349+2
262.9425 -24.9441 0.0 28.7 -17.9 -0.3070 -2.1 12.5 GX 1+4
264.7602 -44.6030 8.1 18.0 -61.7 0.2066 1.4 9.2 4U 1735-44
268.3865 -1.3734 12.8 46.2 10.4 0.2437 0.9 4.9 SW J1753.5-0127
270.2335 -25.2792 0.0 24.2 -7.0 -0.2889 -2.0 12.3 GX 5-1
270.2850 -25.5790 6.1 23.9 -7.4 0.2831 1.9 9.9 GRS 1758-258
273.9649 -14.2027 16.9 32.2 11.0 -0.1040 -0.7 10.3 GX 17+2
276.1395 -30.3913 4.4 17.0 -3.7 -0.3168 -2.6 11.2 H1820-303
285.0813 -24.9234 133.7 18.9 27.4 -0.0120 -0.1 2.5 HT1900.1-2455
263.1337 -33.9391 8.4 22.8 -33.7 0.1809 1.4 9.5 GX 354-0
297.4651 -24.9855 0.8 19.4 62.0 2.0388 14.4 ------ UNKNOWN
39.7602 -86.2981 2.2 48.0 -143.8 1.7927 5.3 ------ UNKNOWN
205.0174 -82.3219 2.3 46.4 -128.5 2.6134 4.9 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
104.988590 248.828000
250.288000 962.340300
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
256.0530 -37.8896 30.5 37.3 -104.4 1.3252 0.4 4.2 4U 1700-377
256.6070 -36.5668 5.3 36.7 -102.3 7.5644 2.2 12.0 GX 349+2
263.1589 -24.8682 6.6 31.1 -81.2 3.5223 1.7 11.0 GX 1+4
264.7913 -44.5791 13.4 32.9 -118.8 1.7623 0.9 8.0 4U 1735-44
268.3399 -1.6043 45.6 36.6 -38.8 -0.4800 -0.3 9.3 SW J1753.5-0127
270.4257 -25.0768 2.9 24.5 -80.0 6.4681 4.1 7.7 GX 5-1
270.3033 -25.6217 7.6 24.6 -81.3 2.5741 1.6 7.3 GRS 1758-258
273.9971 -13.9796 5.8 24.7 -51.9 2.8091 2.0 3.4 GX 17+2
275.8994 -30.4037 4.5 19.9 -94.7 3.4687 2.6 2.6 H1820-303
284.9033 -25.0938 0.0 11.4 -77.3 1.0537 0.9 12.7 HT1900.1-2455
288.7831 10.8371 6.4 36.8 1.7 -2.8517 -1.8 6.6 GRS 1915+105
262.9726 -33.8515 18.0 31.2 -98.6 1.2495 0.6 1.3 GX 354-0
292.1237 5.0212 2.5 30.4 5.4 6.4333 4.6 ------ UNKNOWN
272.6855 -20.3301 3.9 23.3 -67.5 4.1975 3.0 ------ UNKNOWN
Plot creation:
Sun Aug 24 20:27:13 EDT 2025