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
241.9871 -12.0425 0.0494 26.0 -15.5 0.0137 3.9 TRIG_01334535
------------------------------------------
Foreground time interval of the image:
0.000 0.064 (delta_t = 0.064 [sec])
Background time interval of the image:
-60.936 -33.183 (delta_t = 27.753 [sec])
-28.936 -6.936 (delta_t = 22.000 [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 0.000 sec. to 0.064 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.50000 ( -1.5 -1.5 )
Norm@50keV : 0.0 ( 0 0.00539834 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.50 using 59 PHA bins.
# Reduced chi-squared = 1.167 for 57 degrees of freedom
# Null hypothesis probability = 1.823154e-01
Photon flux (15-150 keV) in 0.064 sec: 0.0 ( 0 0.620209 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 4.02109e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 0.0 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.50 using 59 PHA bins.
# Reduced chi-squared = 1.188 for 56 degrees of freedom
# Null hypothesis probability = 1.590077e-01
Photon flux (15-150 keV) in 0.064 sec: 0.0 0.422911 0.432353 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.38550 ( 0.98395 0.98395 )
beta : -9.37167 ( 2.5 2.5 )
Epeak [keV] : 107.216 ( -80 -80 )
Norm@50keV : 5.99135E-02 ( -0.0603206 0.179569 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.65 using 59 PHA bins.
# Reduced chi-squared = 1.175 for 55 degrees of freedom
# Null hypothesis probability = 1.751631e-01
Photon flux (15-150 keV) in 0.064 sec: 0.0 ( ) 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] : 5.00000 (-5 -5)
R^2/D10^2 : 0.0 (0 0)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.50 using 59 PHA bins.
# Reduced chi-squared = 1.167 for 57 degrees of freedom
# Null hypothesis probability = 1.823154e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.00000 (-7 -7)
Norm : 0.0 (0 0)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 28.1897 (-28.1885 -28.1885)
R1^2/D10^2 : 5.51989E-03 (-0.00552844 -0.00552844)
kT2 [keV] : 10.0000 (-10 -10)
R2^2/D10^2 : 0.0 (0 0)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.50000 ( -1.5 -1.5 )
Norm@50keV : 0.0 ( 0 0.00539834 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.50 using 59 PHA bins.
# Reduced chi-squared = 1.167 for 57 degrees of freedom
# Null hypothesis probability = 1.823154e-01
Photon flux (15-150 keV) in 0.064 sec: 0.0 ( 0 0.620209 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 4.02109e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 0.0 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.50 using 59 PHA bins.
# Reduced chi-squared = 1.188 for 56 degrees of freedom
# Null hypothesis probability = 1.590077e-01
Photon flux (15-150 keV) in 0.064 sec: 0.0 0.422911 0.432353 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.38550 ( 0.98395 0.98395 )
beta : -9.37167 ( 2.5 2.5 )
Epeak [keV] : 107.216 ( -80 -80 )
Norm@50keV : 5.99135E-02 ( -0.0603206 0.179569 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.65 using 59 PHA bins.
# Reduced chi-squared = 1.175 for 55 degrees of freedom
# Null hypothesis probability = 1.751631e-01
Photon flux (15-150 keV) in 0.064 sec: 0.0 ( ) 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] : 5.00000 (-5 -5)
R^2/D10^2 : 0.0 (0 0)
(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 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.00000 (-7 -7)
Norm : 0.0 (0 0)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 28.1897 (-28.1885 -28.1885)
R1^2/D10^2 : 5.51989E-03 (-0.00552844 -0.00552844)
kT2 [keV] : 10.0000 (-10 -10)
R2^2/D10^2 : 0.0 (0 0)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
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: 1.50000 ( -1.5 -1.5 )
Norm@50keV : 0.0 ( 0 0.00539834 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.50 using 59 PHA bins.
# Reduced chi-squared = 1.167 for 57 degrees of freedom
# Null hypothesis probability = 1.823154e-01
Photon flux (15-150 keV) in 0.064 sec: 0.0 ( 0 0.620209 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 4.02109e-09 ) 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 : 0.0 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.50 using 59 PHA bins.
# Reduced chi-squared = 1.188 for 56 degrees of freedom
# Null hypothesis probability = 1.590077e-01
Photon flux (15-150 keV) in 0.064 sec: 0.0 0.422911 0.432353 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.38550 ( 0.98395 0.98395 )
beta : -9.37167 ( 2.5 2.5 )
Epeak [keV] : 107.216 ( -80 -80 )
Norm@50keV : 5.99135E-02 ( -0.0603206 0.179569 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.65 using 59 PHA bins.
# Reduced chi-squared = 1.175 for 55 degrees of freedom
# Null hypothesis probability = 1.751631e-01
Photon flux (15-150 keV) in 0.064 sec: 0.0 ( ) 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) = 0.00e+00
S(50-100 keV) = 0.00e+00
T90 vs. Hardness ratio plot
T90 = 0.0640000104904175 sec.
Hardness ratio (energy fluence ratio) =
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.273957
Count Ratio (50-100 keV) / (15-25 keV) = -2.96223
Mask shadow pattern
IMX = 4.691809527200299E-01, IMY = 1.298099815160721E-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:
-60.936000 -33.182600
-28.936000 -6.936000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
245.0128 -15.6441 0.6 21.4 -13.8 2.1724 18.2 1.9 Sco X-1
256.0249 -37.8147 3.5 4.6 -138.2 0.3634 3.3 2.5 4U 1700-377
256.4161 -36.2681 10.5 3.0 -133.5 0.1155 1.1 9.3 GX 349+2
263.0147 -24.7477 506.4 9.8 50.5 -0.0024 -0.0 0.3 GX 1+4
264.6537 -44.6499 0.0 12.3 179.4 -0.1242 -1.2 12.6 4U 1735-44
268.3705 -1.6008 8.5 33.4 41.6 0.2367 1.3 8.9 SW J1753.5-0127
270.2470 -25.1111 4.2 13.6 77.5 0.3283 2.8 2.8 GX 5-1
270.1195 -25.7543 24.0 13.1 79.3 -0.0570 -0.5 9.9 GRS 1758-258
274.1384 -14.1275 9.2 24.3 63.5 0.1734 1.3 9.5 GX 17+2
276.1198 -30.4314 4.5 15.7 106.0 0.3057 2.6 10.8 H1820-303
285.0153 -24.9267 5.6 25.1 99.5 -0.3272 -2.1 1.2 HT1900.1-2455
262.8993 -34.0287 7.9 4.2 120.8 0.1403 1.5 12.5 GX 354-0
304.3442 -23.9832 2.8 41.4 111.6 2.0100 4.1 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
0.000000 0.064000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9575 -15.5662 8.6 21.4 -13.9 0.0042 1.3 4.6 Sco X-1
255.7409 -37.7586 0.0 4.6 -135.3 0.0017 0.5 12.7 4U 1700-377
256.6775 -36.5072 0.0 3.2 -138.8 -0.0032 -1.0 12.7 GX 349+2
262.7897 -24.6727 0.0 9.8 49.2 -0.0075 -2.3 12.7 GX 1+4
265.0210 -44.5177 0.0 12.3 178.0 0.0039 1.2 12.6 4U 1735-44
268.2806 -1.3363 8.7 33.6 41.3 -0.0071 -1.3 8.7 SW J1753.5-0127
270.3358 -25.2197 4.7 13.6 78.1 -0.0087 -2.4 8.9 GX 5-1
270.5155 -25.7805 11.8 13.4 80.4 -0.0038 -1.1 11.7 GRS 1758-258
274.1024 -13.9066 23.2 24.5 63.1 0.0021 0.5 9.6 GX 17+2
275.9900 -30.4476 4.9 15.6 106.0 -0.0076 -2.3 5.9 H1820-303
284.9902 -25.1221 0.0 24.9 99.9 0.0094 2.0 12.3 HT1900.1-2455
262.7756 -33.8005 53.8 4.0 117.7 -0.0007 -0.2 10.8 GX 354-0
323.7544 -67.1100 2.1 50.1 174.9 0.0458 5.5 ------ UNKNOWN
230.7458 -23.5079 2.1 25.8 -51.9 0.0223 5.6 ------ UNKNOWN
209.7770 -73.0598 2.6 46.3 -140.1 0.0341 4.5 ------ UNKNOWN
213.8728 0.3517 2.0 53.4 -37.5 0.0943 5.8 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
293.564600 302.131700
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
83.6404 22.0273 2.1 36.2 -68.8 0.3883 5.4 0.9 Crab
60.7010 -26.5124 2.5 55.2 4.9 0.6457 4.6 ------ UNKNOWN
50.0315 9.8890 1.7 17.4 3.1 0.2223 7.0 ------ UNKNOWN
69.7085 17.5113 2.4 25.3 -51.7 0.1749 4.8 ------ UNKNOWN
83.2935 -18.2058 2.2 58.6 -21.7 1.0807 5.3 ------ UNKNOWN
90.2554 11.9601 2.6 45.6 -57.7 0.6164 4.4 ------ UNKNOWN
Plot creation:
Sat Jul 19 00:26:09 EDT 2025