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
117.0835 -67.7765 0.0265 11.0 60.5 0.2649 7.2 TRIG_01236151
------------------------------------------
Foreground time interval of the image:
-1.448 7.896 (delta_t = 9.344 [sec])
Background time interval of the image:
-239.016 -55.626 (delta_t = 183.390 [sec])
-55.016 -1.448 (delta_t = 53.568 [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 -1.448 sec. to 7.896 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 5.07272 ( -0.780194 0.932159 )
Norm@50keV : 1.50518E-04 ( -0.000150441 0.000181505 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.97 using 59 PHA bins.
# Reduced chi-squared = 1.034 for 57 degrees of freedom
# Null hypothesis probability = 4.034820e-01
Photon flux (15-150 keV) in 9.344 sec: 0.248979 ( -0.0478172 0.0481361 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.40367e-08 ( -1.61257e-08 1.72511e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -1.448 sec. to 7.896 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 2.88773E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 121.21 using 59 PHA bins.
# Reduced chi-squared = 2.1645 for 56 degrees of freedom
# Null hypothesis probability = 1.039878e-06
Photon flux (15-150 keV) in 9.344 sec: 0.247290 0.255800 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 7.05933e-08 ( -1.30219e-08 1.33431e-08 ) ergs/cm2
Band function
Time interval is from -1.448 sec. to 7.896 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.62403 ( -8.53842 5.03914 )
beta : -10.0000 ( 10 10 )
Epeak [keV] : 12.5854 ( -2.84469 1.67144 )
Norm@50keV : 4027.67 ( -709.852 62389.7 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.41 using 59 PHA bins.
# Reduced chi-squared = 1.007 for 55 degrees of freedom
# Null hypothesis probability = 4.592996e-01
Photon flux (15-150 keV) in 9.344 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 7.03443e-08 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 2.75377 (-0.425584 0.505784)
R^2/D10^2 : 63.8938 (-63.896 140.434)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.72 using 59 PHA bins.
# Reduced chi-squared = 0.9775 for 57 degrees of freedom
# Null hypothesis probability = 5.231996e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.426e-08 3.549e-08
25- 50 6.876e-09 4.392e-09
50-150 5.354e-12 5.985e-12
15-150 7.114e-08 3.905e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 5.36749 (-1.27653 1.83403)
Norm : 45.3694 (-26.4661 74.866)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.226e-08 3.248e-08
25- 50 9.201e-09 5.666e-09
50-150 6.740e-11 7.788e-11
15-150 7.153e-08 3.993e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.75054 (-2.75189 -2.75189)
R1^2/D10^2 : 29.5675 (-29.7212 -29.7212)
kT2 [keV] : 2.76032 (-2.75419 -2.75419)
R2^2/D10^2 : 34.0100 (-34.1649 -34.1649)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.426e-08 1.241e+02
25- 50 6.895e-09 1.052e+03
50-150 5.405e-12 2.851e+04
15-150 7.116e-08 2.611e+04
Peak spectrum fit
Power-law model
Time interval is from 0.900 sec. to 1.900 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 4.29716 ( -1.15645 1.66961 )
Norm@50keV : 4.15497E-04 ( -0.000412578 0.000855627 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.48 using 59 PHA bins.
# Reduced chi-squared = 1.008 for 57 degrees of freedom
# Null hypothesis probability = 4.573755e-01
Photon flux (15-150 keV) in 1 sec: 0.333211 ( -0.127943 0.132969 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.1428e-08 ( -5.02325e-09 6.34752e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.900 sec. to 1.900 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 5.13030E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.83 using 59 PHA bins.
# Reduced chi-squared = 1.300 for 56 degrees of freedom
# Null hypothesis probability = 6.482826e-02
Photon flux (15-150 keV) in 1 sec: 0.358313 0.359580 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.15537e-16 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.900 sec. to 1.900 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.20155 ( 1.66191 1.66191 )
beta : -10.0000 ( 10 10 )
Epeak [keV] : 13.3877 ( -3.10762 4.19262 )
Norm@50keV : 1195.98 ( -389.271 44285.5 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.89 using 59 PHA bins.
# Reduced chi-squared = 0.9980 for 55 degrees of freedom
# Null hypothesis probability = 4.787994e-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] : 3.03843 (-0.765497 1.0538)
R^2/D10^2 : 44.8991 (-45.2294 242.02)
(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 9.080e-09 5.160e-09
25- 50 1.383e-09 8.865e-10
50-150 2.469e-12 2.895e-12
15-150 1.047e-08 6.095e-09
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 6.60329 (-2.6981 5.96875)
Norm : 31.5678 (-31.4315 128.007)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.565e-09 4.992e-09
25- 50 1.914e-09 1.401e-09
50-150 3.401e-11 4.770e-11
15-150 1.051e-08 6.270e-09
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.03433 (-0.767225 1.05206)
R1^2/D10^2 : 45.2782 (-45.2783 242.941)
kT2 [keV] : 0.149242 (-0.149242 -0.149242)
R2^2/D10^2 : 1.36221E-02 (-0.0136221 -0.0136221)
------------------------------------------------------------
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: 5.07272 ( -0.780194 0.932159 )
Norm@50keV : 1.50518E-04 ( -0.000150441 0.000181505 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.97 using 59 PHA bins.
# Reduced chi-squared = 1.034 for 57 degrees of freedom
# Null hypothesis probability = 4.034820e-01
Photon flux (15-150 keV) in 9.344 sec: 0.248979 ( -0.0478172 0.0481361 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.40367e-08 ( -1.61257e-08 1.72511e-08 ) 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 : 2.88773E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 121.21 using 59 PHA bins.
# Reduced chi-squared = 2.1645 for 56 degrees of freedom
# Null hypothesis probability = 1.039878e-06
Photon flux (15-150 keV) in 9.344 sec: 0.247290 0.255800 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 7.05933e-08 ( -1.30219e-08 1.33431e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.62403 ( -8.53842 5.03914 )
beta : -10.0000 ( 10 10 )
Epeak [keV] : 12.5854 ( -2.84469 1.67144 )
Norm@50keV : 4027.67 ( -709.852 62389.7 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.41 using 59 PHA bins.
# Reduced chi-squared = 1.007 for 55 degrees of freedom
# Null hypothesis probability = 4.592996e-01
Photon flux (15-150 keV) in 9.344 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 7.03443e-08 ( 0 0 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 1.36e-08
S(50-100 keV) = 1.61e-09
T90 vs. Hardness ratio plot
T90 = 8.06399989128113 sec.
Hardness ratio (energy fluence ratio) = 0.118382
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.0900178
Count Ratio (50-100 keV) / (15-25 keV) = -0.0467285
Mask shadow pattern
IMX = 9.591202644786639E-02, IMY = -1.694491721669785E-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:
-239.016000 -55.626000
-55.016000 -1.448000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.5524 -40.5377 3.5 30.6 -12.1 1.2229 3.3 1.5 Vela X-1
170.4324 -60.7877 6.1 33.8 44.5 -1.1917 -1.9 10.5 Cen X-3
186.7403 -62.7818 7.8 38.9 54.8 1.3460 1.5 2.4 GX 301-2
189.7229 -77.5074 3.3 32.2 77.5 2.5568 3.6 ------ UNKNOWN
149.6430 -22.7455 2.5 52.0 -11.3 3.2100 4.7 ------ UNKNOWN
29.5170 -24.6848 2.6 58.0 -162.5 7.8640 4.5 ------ UNKNOWN
31.9263 -24.3013 2.1 57.2 -160.1 8.5600 5.6 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-1.448000 7.896000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.7909 -40.5580 5.6 30.7 -11.8 -0.0806 -2.1 12.0 Vela X-1
170.2364 -60.5604 24.0 33.8 44.1 0.0297 0.5 4.4 Cen X-3
186.6627 -62.7760 7.4 38.9 54.7 -0.1422 -1.6 0.4 GX 301-2
117.0834 -67.7765 1.6 11.0 60.5 0.2649 7.2 ------ UNKNOWN
140.9638 -37.0861 2.8 35.8 -9.5 0.1731 4.1 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
67.384590 130.054000
130.984000 951.444000
952.984000 963.084100
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.5259 -40.5589 2.1 29.0 -25.5 7.4743 5.5 0.3 Vela X-1
170.3150 -60.6232 18.1 23.4 43.2 -1.0240 -0.6 0.0 Cen X-3
186.6851 -62.6764 5.8 28.0 58.5 4.3310 2.0 5.7 GX 301-2
209.2122 -66.8992 2.8 32.2 77.6 11.1374 4.1 ------ UNKNOWN
115.0106 -22.1751 3.4 45.6 -57.8 20.8576 3.4 ------ UNKNOWN
Plot creation:
Tue Jun 11 06:27:46 EDT 2024