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
282.0470 -37.0408 0.0166 10.7 128.4 2.4957 11.6 TRIG_01405083
------------------------------------------
Foreground time interval of the image:
-45.612 -38.109 (delta_t = 7.503 [sec])
-36.912 16.398 (delta_t = 53.310 [sec])
Background time interval of the image:
-60.912 -45.612 (delta_t = 15.300 [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
Multiple GTIs in the spectrum
tstart tstop
-45.612000 -38.108800
-36.912000 16.398000
18.088000 32.656000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.18682 ( -0.110145 0.108671 )
Norm@50keV : 2.49739E-03 ( -0.000145177 0.000144774 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.01 using 59 PHA bins.
# Reduced chi-squared = 0.6844 for 57 degrees of freedom
# Null hypothesis probability = 9.671225e-01
Photon flux (15-150 keV) in 75.38 sec: 0.292610 ( -0.018116 0.0181913 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.91709e-06 ( -1.17687e-07 1.1825e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-45.612000 -38.108800
-36.912000 16.398000
18.088000 32.656000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.06582 ( -0.437817 0.128506 )
Epeak [keV] : 418.978 ( -661.227 -661.227 )
Norm@50keV : 2.81929E-03 ( -0.000315145 0.00139135 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.02 using 59 PHA bins.
# Reduced chi-squared = 0.6969 for 56 degrees of freedom
# Null hypothesis probability = 9.588814e-01
Photon flux (15-150 keV) in 75.38 sec: 0.291139 ( -0.019496 0.019273 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.90956e-06 ( -1.26209e-07 1.23676e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-45.612000 -38.108800
-36.912000 16.398000
18.088000 32.656000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.810091 ( 0.811845 0.811845 )
beta : -1.19669 ( 1.19686 0.118667 )
Epeak [keV] : 91.1136 ( -88.8869 -88.8869 )
Norm@50keV : 4.51873E-03 ( -0.00225808 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.93 using 59 PHA bins.
# Reduced chi-squared = 0.7079 for 55 degrees of freedom
# Null hypothesis probability = 9.502887e-01
Photon flux (15-150 keV) in 75.38 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] : 21.1309 (-1.66214 1.86372)
R^2/D10^2 : 1.09903E-02 (-0.00263984 0.00339932)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 95.05 using 59 PHA bins.
# Reduced chi-squared = 1.668 for 57 degrees of freedom
# Null hypothesis probability = 1.168843e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.970e-08 8.458e-09
25- 50 3.597e-07 3.686e-08
50-150 1.197e-06 1.123e-07
15-150 1.627e-06 1.244e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-10.4933 -200)
Norm : 1.24293 (-0.0727957 0.0727957)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.332e-07 1.594e-08
25- 50 4.487e-07 3.222e-08
50-150 9.840e-07 2.194e-07
15-150 1.666e-06 2.371e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.60478 (-1.24083 1.55439)
R1^2/D10^2 : 0.300207 (-0.158384 0.366008)
kT2 [keV] : 29.9622 (-3.96908 5.97741)
R2^2/D10^2 : 3.18107E-03 (-0.00139914 0.00190394)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.824e-07 5.533e-08
25- 50 3.893e-07 1.000e-07
50-150 1.343e-06 2.310e-07
15-150 1.914e-06 3.094e-07
Peak spectrum fit
Power-law model
Time interval is from 0.344 sec. to 1.344 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.937420 ( -0.277061 0.264559 )
Norm@50keV : 9.73373E-03 ( -0.00143557 0.00141094 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.54 using 59 PHA bins.
# Reduced chi-squared = 1.185 for 57 degrees of freedom
# Null hypothesis probability = 1.602059e-01
Photon flux (15-150 keV) in 1 sec: 1.11796 ( -0.165004 0.166296 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.07686e-07 ( -1.5866e-08 1.59617e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.344 sec. to 1.344 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.930611 ( -1.16028 0.43834 )
Epeak [keV] : 9992.77 ( -9990.31 -9990.31 )
Norm@50keV : 9.79471E-03 ( -0.00135562 0.0203869 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.54 using 59 PHA bins.
# Reduced chi-squared = 1.206 for 56 degrees of freedom
# Null hypothesis probability = 1.389306e-01
Photon flux (15-150 keV) in 1 sec: 1.11325 ( -0.08993 0.17027 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.07511e-07 ( -1.63833e-08 1.6122e-08 ) ergs/cm2
Band function
Time interval is from 0.344 sec. to 1.344 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.825335 ( 0.825335 0.825335 )
beta : -0.937418 ( -0.264539 0.27706 )
Epeak [keV] : 27.2811 ( -27.2811 -27.2811 )
Norm@50keV : 1.51640E-02 ( -0.00679335 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.54 using 59 PHA bins.
# Reduced chi-squared = 1.228 for 55 degrees of freedom
# Null hypothesis probability = 1.194764e-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] : 26.0354 (-4.56992 6.24031)
R^2/D10^2 : 2.40073E-02 (-0.0112998 0.0194034)
(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 2.766e-09 9.110e-10
25- 50 1.601e-08 4.240e-09
50-150 7.992e-08 1.915e-08
15-150 9.869e-08 2.263e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-33.6474 -200)
Norm : 4.68918 (-0.686045 0.686045)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.168e-08 6.630e-09
25- 50 2.247e-08 1.245e-08
50-150 4.928e-08 2.786e-08
15-150 8.343e-08 4.653e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.02183 (-2.04371 3.62251)
R1^2/D10^2 : 7.65885 (-7.19536 518.696)
kT2 [keV] : 29.9642 (-6.05071 10.2682)
R2^2/D10^2 : 1.50889E-02 (-0.00869549 0.0166709)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.272e-09 4.684e-09
25- 50 1.570e-08 5.573e-09
50-150 8.301e-08 2.715e-08
15-150 1.080e-07 3.555e-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: 1.18732 ( -0.114725 0.113154 )
Norm@50keV : 2.70700E-03 ( -0.000162315 0.00016184 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.75 using 59 PHA bins.
# Reduced chi-squared = 0.7150 for 57 degrees of freedom
# Null hypothesis probability = 9.486671e-01
Photon flux (15-150 keV) in 60.81 sec: 0.317190 ( -0.0202652 0.0203522 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.6761e-06 ( -1.06371e-07 1.06899e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.18260 ( -0.363486 0.155044 )
Epeak [keV] : 9999.23 ( -9999.23 -9999.23 )
Norm@50keV : 2.72003E-03 ( -0.00016078 0.00129488 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.76 using 59 PHA bins.
# Reduced chi-squared = 0.7278 for 56 degrees of freedom
# Null hypothesis probability = 9.372224e-01
Photon flux (15-150 keV) in 60.81 sec: 0.317114 ( -0.021334 0.019921 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.67594e-06 ( -1.09604e-07 1.06369e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.957383 ( 0.957383 0.957383 )
beta : -1.18731 ( -0.113144 0.114748 )
Epeak [keV] : 43.1805 ( -43.1779 -43.1779 )
Norm@50keV : 4.98820E-03 ( -0.00231874 82773.1 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.75 using 59 PHA bins.
# Reduced chi-squared = 0.7410 for 55 degrees of freedom
# Null hypothesis probability = 9.239399e-01
Photon flux (15-150 keV) in 60.81 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) = 3.99e-07
S(50-100 keV) = 7.02e-07
T90 vs. Hardness ratio plot
T90 = 66.0639998912811 sec.
Hardness ratio (energy fluence ratio) = 1.7594
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.51684
Count Ratio (50-100 keV) / (15-25 keV) = 1.46079
Mask shadow pattern
IMX = -1.177748992578192E-01, IMY = -1.485640944301738E-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:
-60.912000 -45.612000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9881 -15.6331 0.8 28.4 -58.4 1.0256 14.2 0.7 Sco X-1
255.9459 -37.8548 2.0 13.9 -117.7 0.3109 5.7 2.0 4U 1700-377
256.4858 -36.2805 3.2 12.9 -112.0 0.1918 3.6 8.9 GX 349+2
262.8455 -24.6763 3.6 9.8 -44.7 0.1666 3.2 9.8 GX 1+4
264.5359 -44.2991 0.0 13.8 -156.5 -0.0366 -0.7 12.7 4U 1735-44
268.2309 -1.3103 0.0 30.2 -1.5 0.0781 1.2 11.9 SW J1753.5-0127
270.4378 -24.9201 0.0 6.5 -0.2 0.0765 1.4 12.7 GX 5-1
270.3763 -25.6126 8.9 5.8 -1.2 -0.0724 -1.3 8.8 GRS 1758-258
274.0682 -13.8816 5.5 17.8 13.9 0.1121 2.1 10.0 GX 17+2
276.0917 -30.5011 4.2 4.5 83.3 0.1372 2.7 11.8 H1820-303
285.0820 -25.0614 8.0 14.0 70.3 -0.0772 -1.4 8.8 HT1900.1-2455
288.8277 10.9079 18.8 45.7 28.8 0.0778 0.6 2.8 GRS 1915+105
262.9718 -33.6856 9.6 7.1 -106.7 -0.0650 -1.2 9.0 GX 354-0
263.9980 -41.6061 2.1 11.6 -149.3 0.2757 5.4 ------ UNKNOWN
211.3990 -80.5550 2.4 54.2 -166.0 0.8050 4.8 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-45.612000 -38.108800
-36.912000 16.398000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
245.0347 -15.7267 4.5 28.4 -58.4 0.7194 2.6 6.1 Sco X-1
256.1870 -37.7115 0.0 13.7 -117.4 0.1524 0.7 12.4 4U 1700-377
256.5565 -36.2839 3.1 12.9 -112.1 -0.7409 -3.7 10.2 GX 349+2
262.8456 -24.6592 4.2 9.9 -44.6 -0.5439 -2.7 10.3 GX 1+4
264.6157 -44.4580 5.6 13.9 -157.0 0.4317 2.1 5.5 4U 1735-44
268.2311 -1.3145 4.7 30.2 -1.5 -0.6221 -2.4 11.7 SW J1753.5-0127
270.1689 -25.1358 7.3 6.3 -2.5 0.3610 1.7 7.1 GX 5-1
270.2387 -25.6733 7.0 5.8 -2.5 0.4310 2.0 5.4 GRS 1758-258
273.9106 -14.1937 6.4 17.5 13.5 0.3912 1.8 10.9 GX 17+2
275.9996 -30.5102 5.6 4.4 83.2 -0.4077 -2.0 9.4 H1820-303
284.9515 -25.0097 5.0 13.9 69.9 0.5008 2.3 7.1 HT1900.1-2455
288.8386 10.8044 5.2 45.6 28.9 -1.1642 -2.2 8.8 GRS 1915+105
262.9747 -33.8340 57.4 7.1 -107.8 0.0433 0.2 0.7 GX 354-0
298.9288 -2.7560 3.0 38.9 52.1 1.8566 3.8 ------ UNKNOWN
282.0470 -37.0408 1.0 10.7 128.4 2.4950 11.6 ------ UNKNOWN
256.4743 22.9021 2.4 56.1 -12.2 4.1667 4.9 ------ UNKNOWN
230.1627 -38.2229 2.0 33.9 -109.1 2.1313 5.7 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
61.688590 88.758000
90.088000 242.141700
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9945 -15.6465 0.8 39.1 -65.6 11.4204 13.9 0.9 Sco X-1
255.9952 -37.8203 0.8 20.7 -98.8 5.4091 14.4 1.5 4U 1700-377
256.6125 -36.4717 8.0 20.3 -94.8 0.5260 1.4 9.0 GX 349+2
262.9477 -24.7645 5.6 20.4 -57.2 0.7871 2.1 3.5 GX 1+4
264.9117 -44.3240 11.0 14.9 -123.4 0.3517 1.0 10.5 4U 1735-44
268.3711 -1.3063 44.6 37.9 -21.3 0.1141 0.3 8.8 SW J1753.5-0127
270.3359 -25.0516 4.1 15.6 -41.9 0.9055 2.8 3.3 GX 5-1
270.1223 -25.8799 0.0 15.1 -44.4 0.7004 2.2 12.7 GRS 1758-258
274.0264 -13.9661 4.4 24.1 -18.0 0.8702 2.6 4.4 GX 17+2
275.7457 -30.4966 6.8 8.4 -39.3 0.5298 1.7 12.1 H1820-303
284.8834 -25.0766 0.0 12.2 13.5 -0.1221 -0.4 12.5 HT1900.1-2455
288.8921 11.0198 8.3 48.5 10.3 -0.8438 -1.4 7.1 GRS 1915+105
263.0039 -33.8724 38.9 15.8 -82.8 -0.1016 -0.3 2.4 GX 354-0
Plot creation:
Sun Oct 19 04:58:35 EDT 2025