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
353.3781 -2.9066 0.0233 47.0 -150.1 6.5159 8.3 TRIG_01500295
------------------------------------------
Foreground time interval of the image:
23.172 134.790 (delta_t = 111.618 [sec])
136.000 196.901 (delta_t = 60.901 [sec])
Background time interval of the image:
-10.499 23.172 (delta_t = 33.671 [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 64.000000
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 64.000000
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 64.000000
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
23.172000 134.790000
136.000000 489.024000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 4.68514 ( -0.495281 0.54487 )
Norm@50keV : 1.91507E-04 ( -7.67918e-05 0.0001041 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.88 using 59 PHA bins.
# Reduced chi-squared = 1.243 for 57 degrees of freedom
# Null hypothesis probability = 1.023386e-01
Photon flux (15-150 keV) in 464.6 sec: 0.219528 ( -0.0243443 0.0244701 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.35739e-06 ( -3.71239e-07 3.74285e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
23.172000 134.790000
136.000000 489.024000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 2.30590E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 206.06 using 59 PHA bins.
# Reduced chi-squared = 3.6796 for 56 degrees of freedom
# Null hypothesis probability = 4.989004e-19
Photon flux (15-150 keV) in 464.6 sec: 0.218810 ( -0.02594 0.024864 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.34216e-06 ( -4.26856e-07 3.87147e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
23.172000 134.790000
136.000000 489.024000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -6.00137 ( 6.00137 6.00137 )
beta : -4.68513 ( -0.544867 0.49444 )
Epeak [keV] : 7.39796 ( -7.39796 -7.39796 )
Norm@50keV : 2.60285E-02 ( -0.0104192 0.0141644 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.88 using 59 PHA bins.
# Reduced chi-squared = 1.289 for 55 degrees of freedom
# Null hypothesis probability = 7.341667e-02
Photon flux (15-150 keV) in 464.6 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] : 3.34566 (-0.448833 0.542788)
R^2/D10^2 : 14.4636 (-8.80953 23.2832)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 81.42 using 59 PHA bins.
# Reduced chi-squared = 1.428 for 57 degrees of freedom
# Null hypothesis probability = 1.856762e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.398e-06 5.873e-07
25- 50 5.037e-07 1.744e-07
50-150 1.875e-09 1.388e-09
15-150 2.903e-06 6.537e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.25456 (-1.45061 1.92715)
Norm : 15.1444 (-6.98105 14.9232)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.427e-06 5.220e-07
25- 50 6.412e-07 1.982e-07
50-150 1.617e-08 1.198e-08
15-150 3.085e-06 6.602e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.86778 (-0.593548 0.580339)
R1^2/D10^2 : 646.973 (-653.347 24961.9)
kT2 [keV] : 5.42093 (-1.16385 1.56298)
R2^2/D10^2 : 0.660699 (-0.536979 2.30045)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.507e-06 1.227e-06
25- 50 8.378e-07 4.600e-07
50-150 4.796e-08 3.324e-08
15-150 3.393e-06 1.644e-06
Peak spectrum fit
Power-law model
Time interval is from 75.344 sec. to 76.344 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 4.04371 ( -0.690614 0.852396 )
Norm@50keV : 3.92688E-03 ( -0.00221826 0.00316008 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.16 using 59 PHA bins.
# Reduced chi-squared = 0.9853 for 57 degrees of freedom
# Null hypothesis probability = 5.064921e-01
Photon flux (15-150 keV) in 1 sec: 2.51602 ( -0.448868 0.448931 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.93109e-08 ( -1.82829e-08 1.96041e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 75.344 sec. to 76.344 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 3.43337E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 95.83 using 59 PHA bins.
# Reduced chi-squared = 1.711 for 56 degrees of freedom
# Null hypothesis probability = 7.317045e-04
Photon flux (15-150 keV) in 1 sec: 2.51429 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 8.8665e-08 ( 0 0 ) ergs/cm2
Band function
Time interval is from 75.344 sec. to 76.344 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -8.63804 ( 8.63804 8.63804 )
beta : -4.04368 ( -0.852029 0.690344 )
Epeak [keV] : 0.862455 ( -0.862455 -0.862455 )
Norm@50keV : 0.533733 ( -0.301497 0.429494 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.16 using 59 PHA bins.
# Reduced chi-squared = 1.021 for 55 degrees of freedom
# Null hypothesis probability = 4.311049e-01
Photon flux (15-150 keV) in 1 sec: 2.51425 ( 4.48575 -0.44853 ) 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] : 3.41488 (-0.61556 0.825858)
R^2/D10^2 : 152.171 (-152.207 377.159)
(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 6.090e-08 3.372e-08
25- 50 1.366e-08 8.050e-09
50-150 5.889e-11 5.400e-11
15-150 7.462e-08 4.081e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 8.47849 (-2.70199 5.20785)
Norm : 120.366 (-73.9157 219.157)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.900e-08 2.189e-08
25- 50 2.006e-08 9.999e-09
50-150 8.506e-10 7.547e-10
15-150 7.991e-08 3.268e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.53288 (-0.886401 0.875255)
R1^2/D10^2 : 787.781 (-658.138 18867.4)
kT2 [keV] : 8.93022 (-3.62706 7.28857)
R2^2/D10^2 : 0.709184 (-0.656636 8.28514)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.846e-08 3.172e-08
25- 50 2.671e-08 1.545e-08
50-150 8.578e-09 6.865e-09
15-150 9.374e-08 4.703e-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: 4.61474 ( -0.35781 0.378867 )
Norm@50keV : 5.67285E-04 ( -0.000157693 0.000191518 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 86.07 using 59 PHA bins.
# Reduced chi-squared = 1.510 for 57 degrees of freedom
# Null hypothesis probability = 7.705503e-03
Photon flux (15-150 keV) in 172.5 sec: 0.609042 ( -0.0537738 0.0547591 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.48257e-06 ( -2.71144e-07 2.71568e-07 ) 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 : 5.62098E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 324.36 using 59 PHA bins.
# Reduced chi-squared = 5.7922 for 56 degrees of freedom
# Null hypothesis probability = 1.893193e-39
Photon flux (15-150 keV) in 172.5 sec: 0.610311 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.48781e-06 ( 0 0 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.21921 ( 14.1737 9.21921 )
beta : -4.61476 ( -0.378864 0.358146 )
Epeak [keV] : 129.685 ( -129.685 -129.685 )
Norm@50keV : 7.71008E-02 ( -0.0214325 0.0260299 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 86.07 using 59 PHA bins.
# Reduced chi-squared = 1.565 for 55 degrees of freedom
# Null hypothesis probability = 4.676111e-03
Photon flux (15-150 keV) in 172.5 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) = 7.21e-07
S(50-100 keV) = 1.12e-07
T90 vs. Hardness ratio plot
T90 = 79.1119999885559 sec.
Hardness ratio (energy fluence ratio) = 0.15534
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.294915
Count Ratio (50-100 keV) / (15-25 keV) = 0.0123643
Mask shadow pattern
IMX = -9.289753211546096E-01, IMY = 5.346939698185558E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
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:
-10.499400 23.172000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.5082 35.2524 6.1 52.9 15.9 0.6953 1.9 5.9 Her X-1
288.8236 10.9407 211.1 33.0 -36.3 0.0060 0.1 1.5 GRS 1915+105
299.6121 35.1978 0.9 16.4 16.6 1.0297 12.7 1.1 Cyg X-1
307.9140 40.8433 4.6 13.8 48.6 0.2125 2.5 11.1 Cyg X-3
326.0023 38.4081 8.8 10.9 117.3 -0.1042 -1.3 9.5 Cyg X-2
350.6066 61.7050 2.3 38.5 106.5 1.2250 5.0 ------ UNKNOWN
311.4398 33.8590 3.1 7.0 30.7 0.2797 3.7 ------ UNKNOWN
272.7422 15.0425 2.1 44.0 -17.0 0.7155 5.4 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
23.172000 134.790000
136.000000 196.900590
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.3584 35.4009 6.3 53.0 16.1 -3.5390 -1.8 6.0 Her X-1
288.6683 10.8369 3.6 33.2 -36.3 1.4900 3.3 10.1 GRS 1915+105
299.7736 35.1893 5.6 16.3 16.6 -0.7535 -2.0 9.0 Cyg X-1
307.9970 40.8216 9.7 13.8 48.7 -0.4530 -1.2 9.4 Cyg X-3
325.9487 38.2081 0.0 10.8 117.8 0.4562 1.3 12.5 Cyg X-2
310.5107 47.7606 2.2 19.0 66.6 2.0157 5.2 ------ UNKNOWN
353.3780 -2.9066 1.4 47.0 -150.1 6.5170 8.3 433.7 UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
222.500600 435.900600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.4386 35.3425 9.5 53.4 10.5 1.2143 1.2 0.9 Her X-1
288.7272 10.9606 5.5 36.0 -41.8 1.1682 2.1 4.3 GRS 1915+105
299.5940 35.2037 0.6 17.1 2.2 6.6293 19.6 0.2 Cyg X-1
308.3169 41.0211 8.1 12.5 33.2 -0.4926 -1.4 10.2 Cyg X-3
326.4048 38.4258 0.0 7.7 118.8 0.7757 2.3 12.6 Cyg X-2
8.0834 47.2320 2.3 38.9 131.8 4.3608 4.9 ------ UNKNOWN
357.3970 46.8640 2.7 31.6 130.6 2.3476 4.2 ------ UNKNOWN
352.9429 -2.9716 1.8 47.4 -149.4 5.5247 6.4 459.3 UNKNOWN
306.2676 0.8529 2.6 34.4 -77.0 3.1607 4.5 ------ UNKNOWN
Plot creation:
Sat Mar 14 13:29:48 EDT 2026