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
290.3838 +4.6789 0.0052 24.3 60.9 3.1861 36.8 TRIG_01324646
------------------------------------------
Foreground time interval of the image:
-5.240 9.509 (delta_t = 14.749 [sec])
Background time interval of the image:
-239.392 -143.622 (delta_t = 95.770 [sec])
-142.392 -5.240 (delta_t = 137.152 [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
Multiple GTIs in the spectrum
tstart tstop
-5.240000 65.898000
67.608000 77.336000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.21670 ( -0.0771163 0.0765041 )
Norm@50keV : 4.70290E-03 ( -0.000185267 0.000184857 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.06 using 59 PHA bins.
# Reduced chi-squared = 1.247 for 57 degrees of freedom
# Null hypothesis probability = 9.967427e-02
Photon flux (15-150 keV) in 80.87 sec: 0.553356 ( -0.0234561 0.023592 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.84059e-06 ( -1.60438e-07 1.61096e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-5.240000 65.898000
67.608000 77.336000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.21392 ( -0.0791836 0.0755612 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 4.72492E-03 ( -0.000183797 0.000409263 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.21 using 59 PHA bins.
# Reduced chi-squared = 1.272 for 56 degrees of freedom
# Null hypothesis probability = 8.284941e-02
Photon flux (15-150 keV) in 80.87 sec: 0.554296 ( -0.024865 0.022516 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.84471e-06 ( -1.64109e-07 1.55448e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-5.240000 65.898000
67.608000 77.336000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.965406 ( 0.965525 0.965525 )
beta : -1.21668 ( -0.0765004 0.0771345 )
Epeak [keV] : 48.2734 ( -48.1855 -48.1855 )
Norm@50keV : 8.70491E-03 ( -0.00311116 0.655619 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.06 using 59 PHA bins.
# Reduced chi-squared = 1.292 for 55 degrees of freedom
# Null hypothesis probability = 7.135177e-02
Photon flux (15-150 keV) in 80.87 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] : 21.3138 ( )
R^2/D10^2 : 1.97097E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 260.58 using 59 PHA bins.
# Reduced chi-squared = 4.5715 for 57 degrees of freedom
# Null hypothesis probability = 8.309059e-28
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.359e-07 1.096e-08
25- 50 7.051e-07 4.751e-08
50-150 2.390e-06 1.468e-07
15-150 3.231e-06 1.621e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 2.34586 ( )
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.724e-07 2.224e-08
25- 50 9.087e-07 4.205e-08
50-150 1.993e-06 8.572e-08
15-150 3.374e-06 1.581e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.28484 (-0.96339 1.07874)
R1^2/D10^2 : 0.473213 (-0.180549 0.325163)
kT2 [keV] : 37.4092 (-4.91332 7.23341)
R2^2/D10^2 : 2.98669E-03 (-0.00118524 0.00159801)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.851e-07 5.499e-08
25- 50 8.072e-07 8.047e-08
50-150 2.778e-06 3.279e-07
15-150 3.971e-06 3.922e-07
Peak spectrum fit
Power-law model
Time interval is from 3.288 sec. to 4.288 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.70183 ( -0.142323 0.145246 )
Norm@50keV : 3.11197E-02 ( -0.00260666 0.00257394 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.15 using 59 PHA bins.
# Reduced chi-squared = 1.090 for 57 degrees of freedom
# Null hypothesis probability = 2.979163e-01
Photon flux (15-150 keV) in 1 sec: 4.13568 ( -0.320919 0.321399 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.8809e-07 ( -2.53198e-08 2.55662e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 3.288 sec. to 4.288 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.70427 ( -0.146775 0.142611 )
Epeak [keV] : 9999.36 ( -9999.35 -9999.36 )
Norm@50keV : 3.10971E-02 ( -0.00924612 0.0169416 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.16 using 59 PHA bins.
# Reduced chi-squared = 1.110 for 56 degrees of freedom
# Null hypothesis probability = 2.662287e-01
Photon flux (15-150 keV) in 1 sec: 4.13631 ( -0.32057 0.31909 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.87607e-07 ( -2.5013e-08 2.5845e-08 ) ergs/cm2
Band function
Time interval is from 3.288 sec. to 4.288 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.23868 ( 1.22172 1.22172 )
beta : -1.70911 ( 1.70934 0.148331 )
Epeak [keV] : 37.0480 ( -35.6431 -35.6431 )
Norm@50keV : 7.19306E-02 ( -0.0524863 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.09 using 59 PHA bins.
# Reduced chi-squared = 1.129 for 55 degrees of freedom
# Null hypothesis probability = 2.382217e-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] : 12.6343 ( )
R^2/D10^2 : 0.806526 ( )
(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 2.730e-08 3.885e-09
25- 50 9.114e-08 8.150e-09
50-150 9.041e-08 1.635e-08
15-150 2.088e-07 2.015e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 143.247 (-45.3704 -142.323)
Norm : 16.9625 (-1.51605 1.84913)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.373e-08 4.815e-09
25- 50 8.050e-08 1.169e-08
50-150 1.559e-07 6.653e-08
15-150 2.801e-07 7.720e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.08512 (-1.3582 1.7254)
R1^2/D10^2 : 8.55669 (-4.98788 14.0488)
kT2 [keV] : 26.3657 (-6.57639 14.1621)
R2^2/D10^2 : 4.59767E-02 (-0.0342902 0.0549865)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.834e-08 1.545e-08
25- 50 7.557e-08 1.774e-08
50-150 1.647e-07 6.017e-08
15-150 2.886e-07 8.750e-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: 1.22226 ( -0.0803172 0.0798451 )
Norm@50keV : 1.37399E-02 ( -0.000563112 0.000562712 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.30 using 59 PHA bins.
# Reduced chi-squared = 1.075 for 57 degrees of freedom
# Null hypothesis probability = 3.244263e-01
Photon flux (15-150 keV) in 14.75 sec: 1.61801 ( -0.0704174 0.0707327 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.04341e-06 ( -9.14097e-08 9.19251e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.21810 ( -0.0874051 0.0743719 )
Epeak [keV] : 1.00000E+04 ( -10000 -10000 )
Norm@50keV : 1.38030E-02 ( -0.000563739 0.000563632 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.43 using 59 PHA bins.
# Reduced chi-squared = 1.097 for 56 degrees of freedom
# Null hypothesis probability = 2.876231e-01
Photon flux (15-150 keV) in 14.75 sec: 1.62028 ( -0.074 0.06809 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.04612e-06 ( -9.41345e-08 8.8205e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.974897 ( 0.97498 0.97498 )
beta : -1.22223 ( -0.0798438 0.0803239 )
Epeak [keV] : 47.4674 ( -47.3992 -47.3992 )
Norm@50keV : 2.53339E-02 ( -0.00916007 1.1483e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.30 using 59 PHA bins.
# Reduced chi-squared = 1.115 for 55 degrees of freedom
# Null hypothesis probability = 2.603001e-01
Photon flux (15-150 keV) in 14.75 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) = 8.15e-07
S(50-100 keV) = 1.40e-06
T90 vs. Hardness ratio plot
T90 = 52.4879999160767 sec.
Hardness ratio (energy fluence ratio) = 1.71779
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.28278
Count Ratio (50-100 keV) / (15-25 keV) = 1.22094
Mask shadow pattern
IMX = 2.194587931204579E-01, IMY = -3.944902431669288E-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:
-239.392000 -143.622000
-142.392000 -5.240000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.6612 35.4432 0.0 30.6 172.7 -0.5615 -1.3 11.6 Her X-1
268.3685 -1.4522 114.9 36.9 99.5 0.0821 0.1 0.0 SW J1753.5-0127
288.6843 11.0399 3.5 18.0 66.2 1.2930 3.3 8.8 GRS 1915+105
299.5676 35.1988 0.6 10.0 -69.5 6.5801 20.1 1.1 Cyg X-1
308.0147 41.0072 2.9 18.8 -73.3 1.5985 4.0 5.4 Cyg X-3
326.1864 38.3220 369.3 31.1 -55.8 0.0143 0.0 0.7 Cyg X-2
290.1663 -1.9078 2.5 30.9 61.4 3.0056 4.6 ------ UNKNOWN
288.3995 6.6756 2.1 22.4 66.1 2.4195 5.4 ------ UNKNOWN
329.0317 -10.1495 2.8 54.1 11.7 4.6673 4.1 ------ UNKNOWN
288.2881 38.2233 3.2 9.4 -128.4 1.1481 3.6 ------ UNKNOWN
333.6400 27.1199 1.8 38.1 -36.8 3.1304 6.3 ------ UNKNOWN
225.3227 60.8888 3.1 52.9 -152.4 3.8408 3.7 ------ UNKNOWN
344.0089 41.7058 2.8 44.9 -60.3 7.2684 4.2 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-5.240000 9.508600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.2546 35.2418 0.0 31.0 172.2 0.2293 2.9 11.6 Her X-1
268.3859 -1.4883 395.2 37.0 99.5 0.0054 0.0 2.4 SW J1753.5-0127
288.9933 10.9920 4.7 18.0 65.2 0.1849 2.4 11.8 GRS 1915+105
299.6612 35.1765 34.9 10.1 -69.2 -0.0191 -0.3 3.8 Cyg X-1
307.8430 40.9268 0.0 18.7 -73.3 -0.0852 -1.4 12.2 Cyg X-3
326.0611 38.2608 25.0 31.0 -55.7 0.0363 0.5 6.4 Cyg X-2
290.3838 4.6789 0.3 24.3 60.9 3.1850 36.8 ------ UNKNOWN
299.9916 13.7379 2.1 17.7 28.5 0.3467 5.5 ------ UNKNOWN
243.1736 58.6794 2.3 43.7 -152.3 0.5150 4.9 ------ UNKNOWN
334.8619 55.0082 2.7 41.1 -81.0 0.8402 4.2 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
73.908600 348.738000
349.608000 399.278000
400.608000 400.638000
401.608000 427.648000
431.608000 431.918000
434.608000 591.848000
592.608000 962.675100
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.3753 35.3330 4.9 45.2 -173.1 5.7929 2.3 4.1 Her X-1
263.0145 -24.9023 4.6 39.7 90.1 10.6372 2.5 9.4 GX 1+4
268.2504 -1.4377 12.2 22.9 124.5 1.4258 0.9 7.1 SW J1753.5-0127
270.4239 -25.1277 6.7 35.5 81.5 5.9754 1.7 8.1 GX 5-1
270.1548 -25.7013 10.4 36.1 81.3 -3.9393 -1.1 8.4 GRS 1758-258
274.1391 -14.0527 23.2 24.7 89.9 0.9763 0.5 7.8 GX 17+2
275.8650 -30.2635 3.6 37.6 70.2 -12.2837 -3.2 6.9 H1820-303
284.9857 -24.9799 6.1 30.1 59.1 -3.9746 -1.9 4.5 HT1900.1-2455
288.9770 10.9204 6.5 6.4 -142.7 2.0839 1.8 10.6 GRS 1915+105
299.5783 35.1848 0.7 31.7 -116.1 25.8987 15.6 1.2 Cyg X-1
308.1220 40.9554 37.4 39.6 -109.4 -1.1113 -0.3 0.6 Cyg X-3
334.3894 17.0704 3.2 44.9 -60.2 22.3747 3.6 ------ UNKNOWN
Plot creation:
Mon Jun 16 20:08:54 EDT 2025