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
236.9758 -62.5130 0.0191 31.1 -145.3 0.9090 10.0 TRIG_01220736
------------------------------------------
Foreground time interval of the image:
-2.104 24.000 (delta_t = 26.104 [sec])
Background time interval of the image:
-239.840 -2.104 (delta_t = 237.736 [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 4.096000
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 4.096000
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 4.096000
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 -2.104 sec. to 24.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 4.47701 ( -0.633824 0.740588 )
Norm@50keV : 3.61380E-04 ( -0.000191676 0.000290111 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.85 using 59 PHA bins.
# Reduced chi-squared = 0.7693 for 57 degrees of freedom
# Null hypothesis probability = 8.993332e-01
Photon flux (15-150 keV) in 26.1 sec: 0.341695 ( -0.0516463 0.0517261 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.9992e-07 ( -5.20651e-08 5.5148e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -2.104 sec. to 24.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 4.40370E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 113.49 using 59 PHA bins.
# Reduced chi-squared = 2.0265 for 56 degrees of freedom
# Null hypothesis probability = 8.795444e-06
Photon flux (15-150 keV) in 26.1 sec: 0.341315 ( -0.051462 0.051749 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.99581e-07 ( -5.88683e-08 5.54703e-08 ) ergs/cm2
Band function
Time interval is from -2.104 sec. to 24.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.70582 ( 1.70068 1.70068 )
beta : -4.54727 ( 4.53939 0.691524 )
Epeak [keV] : 1.88523 ( -1.86675 2.80937 )
Norm@50keV : 0.103853 ( -0.11669 1.34021e+07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.81 using 59 PHA bins.
# Reduced chi-squared = 0.7966 for 55 degrees of freedom
# Null hypothesis probability = 8.609166e-01
Photon flux (15-150 keV) in 26.1 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] : 3.19310 (-0.505209 0.614776)
R^2/D10^2 : 31.5802 (-20.5392 64.6621)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.89 using 59 PHA bins.
# Reduced chi-squared = 0.8226 for 57 degrees of freedom
# Null hypothesis probability = 8.279130e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.247e-07 8.702e-08
25- 50 4.051e-08 1.975e-08
50-150 1.066e-10 1.015e-10
15-150 2.653e-07 1.086e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 6.99040 (-1.73014 2.54396)
Norm : 26.9795 (-14.4203 36.4142)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.216e-07 7.114e-08
25- 50 5.486e-08 2.607e-08
50-150 1.209e-09 1.099e-09
15-150 2.776e-07 1.012e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.14180 (-0.561383 0.533951)
R1^2/D10^2 : 34.7219 (-22.924 67.7503)
kT2 [keV] : 200.000 (-200 -200)
R2^2/D10^2 : 1.27504E-05 (-1.27421e-05 -1.27421e-05)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.232e-07 8.779e-08
25- 50 4.401e-08 2.146e-08
50-150 6.682e-08 1.418e-10
15-150 3.341e-07 1.161e-07
Peak spectrum fit
Power-law model
Time interval is from 0.840 sec. to 1.840 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.37147 ( -0.637393 0.861395 )
Norm@50keV : 2.54045E-03 ( -0.00147505 0.00180837 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.98 using 59 PHA bins.
# Reduced chi-squared = 0.9646 for 57 degrees of freedom
# Null hypothesis probability = 5.510713e-01
Photon flux (15-150 keV) in 1 sec: 0.926799 ( -0.243168 0.243876 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.70238e-08 ( -1.14943e-08 1.26539e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.840 sec. to 1.840 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 1.44227E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.63 using 59 PHA bins.
# Reduced chi-squared = 1.297 for 56 degrees of freedom
# Null hypothesis probability = 6.685832e-02
Photon flux (15-150 keV) in 1 sec: 0.917231 ( -0.237256 0.238229 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.42135e-08 ( -9.3005e-09 1.06979e-08 ) ergs/cm2
Band function
Time interval is from 0.840 sec. to 1.840 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.203578 ( -6.14042 0.502526 )
beta : -10.0000 ( 10 3.55271e-15 )
Epeak [keV] : 16.0815 ( -5.0344 6.19588 )
Norm@50keV : 0.464729 ( -0.947884 3195.86 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.99 using 59 PHA bins.
# Reduced chi-squared = 0.9635 for 55 degrees of freedom
# Null hypothesis probability = 5.516382e-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] : 5.18547 (-1.15264 1.35431)
R^2/D10^2 : 6.85386 (-6.85386 16.2178)
(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 1.924e-08 1.135e-08
25- 50 1.373e-08 8.505e-09
50-150 6.640e-10 6.160e-10
15-150 3.364e-08 2.007e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 14.5321 (-4.76359 10.0786)
Norm : 17.6642 (-9.04387 21.3671)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.019e-08 2.154e-08
25- 50 1.255e-08 2.180e-08
50-150 1.827e-09 8.755e-09
15-150 3.457e-08 5.221e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.34122E-04 (35.869 -0.000134122)
R1^2/D10^2 : 14.3873 (-14.3873 -14.3873)
kT2 [keV] : 5.18547 (-1.15264 1.35431)
R2^2/D10^2 : 6.85386 (-6.85386 16.2178)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.900e-08 3.120e-07
25- 50 1.312e-08 1.426e-06
50-150 8.462e-10 4.081e-06
15-150 3.297e-08 5.135e-06
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: 4.47701 ( -0.633824 0.740588 )
Norm@50keV : 3.61380E-04 ( -0.000191676 0.000290111 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.85 using 59 PHA bins.
# Reduced chi-squared = 0.7693 for 57 degrees of freedom
# Null hypothesis probability = 8.993332e-01
Photon flux (15-150 keV) in 26.1 sec: 0.341695 ( -0.0516463 0.0517261 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.9992e-07 ( -5.20651e-08 5.5148e-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 : 4.40370E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 113.49 using 59 PHA bins.
# Reduced chi-squared = 2.0265 for 56 degrees of freedom
# Null hypothesis probability = 8.795444e-06
Photon flux (15-150 keV) in 26.1 sec: 0.341315 ( -0.051462 0.051749 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.99581e-07 ( -5.88683e-08 5.54703e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.70582 ( 1.70068 1.70068 )
beta : -4.54727 ( 4.53939 0.691524 )
Epeak [keV] : 1.88523 ( -1.86675 2.46175 )
Norm@50keV : 0.103853 ( -0.11669 1.34009e+07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.81 using 59 PHA bins.
# Reduced chi-squared = 0.7966 for 55 degrees of freedom
# Null hypothesis probability = 8.609166e-01
Photon flux (15-150 keV) in 26.1 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) = 6.97e-08
S(50-100 keV) = 1.25e-08
T90 vs. Hardness ratio plot
T90 = 23.4839998483658 sec.
Hardness ratio (energy fluence ratio) = 0.17934
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.245142
Count Ratio (50-100 keV) / (15-25 keV) = 0.0443811
Mask shadow pattern
IMX = -4.966943705392776E-01, IMY = 3.440426617499832E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000
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:
-239.840000 -2.104000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.5687 -40.6740 7.5 44.4 -38.9 1.4033 1.5 7.4 Vela X-1
170.5082 -60.5425 4.9 23.9 -77.9 1.2744 2.3 7.4 Cen X-3
186.4546 -62.6462 18.8 21.1 -97.2 0.3361 0.6 9.3 GX 301-2
244.9819 -15.5696 4.0 49.5 142.8 5.9916 2.9 4.2 Sco X-1
255.9976 -37.9244 1.7 45.0 175.7 6.6889 6.6 4.8 4U 1700-377
256.5494 -36.2824 12.1 46.1 173.9 1.0446 0.9 10.1 GX 349+2
264.8933 -44.4986 5.6 48.4 -172.3 2.3710 2.0 7.1 4U 1735-44
262.9911 -33.8498 7.4 51.9 174.4 -2.2364 -1.6 0.9 GX 354-0
237.9477 -23.1682 3.0 39.5 144.8 4.2326 3.9 ------ UNKNOWN
158.6475 -13.7615 3.5 43.2 10.5 2.6221 3.3 ------ UNKNOWN
171.2985 -71.6559 2.2 31.7 -95.0 3.6162 5.3 ------ UNKNOWN
127.5101 -52.9363 2.7 45.6 -57.8 8.0700 4.2 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-2.104000 24.000000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.5821 -40.3550 4.9 44.5 -38.5 -0.3540 -2.3 12.2 Vela X-1
170.6634 -60.6312 4.2 23.9 -78.2 -0.2572 -2.8 10.2 Cen X-3
187.0822 -62.7004 0.0 21.0 -98.0 -0.0168 -0.2 12.4 GX 301-2
245.0901 -15.5322 0.0 49.6 142.9 -0.2872 -0.8 9.1 Sco X-1
256.0435 -37.8951 5.2 45.0 175.7 0.3023 2.2 4.1 4U 1700-377
256.3897 -36.5112 83.0 45.9 174.1 -0.0203 -0.1 5.7 GX 349+2
264.8807 -44.5036 20.8 48.4 -172.3 -0.0758 -0.6 6.7 4U 1735-44
263.1310 -33.8886 6.3 52.0 174.6 0.4572 1.8 7.8 GX 354-0
145.1307 -15.9994 2.4 50.8 -4.4 0.8922 4.8 ------ UNKNOWN
236.9743 -62.5134 1.1 31.1 -145.3 0.9111 10.1 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
120.160600 200.211900
202.160000 211.550000
216.160000 403.290000
404.160000 527.040000
528.160000 579.740000
581.160000 593.660610
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.3640 -60.6162 8.8 30.3 18.5 1.6478 1.3 1.5 Cen X-3
186.7283 -62.9096 6.1 22.4 21.9 2.1780 1.9 8.6 GX 301-2
244.9987 -15.6406 2.5 47.2 146.0 16.2863 4.6 1.1 Sco X-1
255.9836 -37.8461 0.7 27.3 169.6 16.0255 15.6 0.2 4U 1700-377
256.5946 -36.3415 7.4 28.9 169.5 1.7595 1.6 9.1 GX 349+2
262.9578 -24.7693 19.4 41.6 172.3 -0.9963 -0.6 3.1 GX 1+4
264.7720 -44.4301 6.8 24.2 -170.1 1.5377 1.7 1.7 4U 1735-44
270.4511 -24.9752 0.0 43.7 -178.2 1.7842 1.1 11.0 GX 5-1
270.3630 -25.9232 0.0 42.8 -177.8 0.8619 0.6 11.3 GRS 1758-258
273.9916 -14.0409 149.3 55.1 -179.1 0.2452 0.1 0.9 GX 17+2
276.0070 -30.2966 297.8 40.8 -168.2 -0.0528 -0.0 6.0 H1820-303
285.1100 -24.9443 6.4 49.2 -161.5 -4.1122 -1.8 4.3 HT1900.1-2455
262.8147 -33.8474 12.3 33.0 177.1 1.1739 0.9 8.7 GX 354-0
243.4298 -23.2780 3.1 39.5 144.8 8.0849 3.7 ------ UNKNOWN
294.0254 -51.4489 3.0 31.8 -128.0 4.9757 3.8 ------ UNKNOWN
Plot creation:
Tue Apr 9 10:40:09 EDT 2024