C.D.S. - SIMBAD4 rel 1.7 - 2019.10.22CEST21:56:36

2015ApJ...808..137J - Astrophys. J., 808, 137 (2015/August-1)

Disentangling overlapping astronomical sources using spatial and spectral information.


Abstract (from CDS):

We present a powerful new algorithm that combines both spatial information (event locations and the point-spread function) and spectral information (photon energies) to separate photons from overlapping sources. We use Bayesian statistical methods to simultaneously infer the number of overlapping sources, to probabilistically separate the photons among the sources, and to fit the parameters describing the individual sources. Using the Bayesian joint posterior distribution, we are able to coherently quantify the uncertainties associated with all these parameters. The advantages of combining spatial and spectral information are demonstrated through a simulation study. The utility of the approach is then illustrated by analysis of observations of FK Aqr and FL Aqr with the XMM-Newton Observatory and the central region of the Orion Nebula Cluster with the Chandra X-ray Observatory.

Abstract Copyright:

Journal keyword(s): methods: statistical - techniques: image processing - X-rays: stars

Simbad objects: 4

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Number of rows : 4

N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
1 NAME Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 1906 1
2 M 42 HII 05 35 17.3 -05 23 28           ~ 3658 0
3 V* FL Aqr SB* 22 38 45.2813724538 -20 36 51.812329450   13.04 11.43 10.29 8.77 M3.5V 127 0
4 V* FK Aqr BY* 22 38 45.5745793091 -20 37 16.086999376 11.714 10.595 9.083 8.073 6.876 M0Vep 249 0

    Equat.    Gal    SGal    Ecl

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