Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-02-09
Astrophys.J. 640 (2006) L17-L20
Astronomy and Astrophysics
Astrophysics
13 pages, 5 figures, accepted for publication in ApJL
Scientific paper
10.1086/503097
We present optical identification and characterization of counterparts of four objects previously catalogued as ultra-luminous X-ray sources. The objects were selected from the Colbert & Ptak (2002) catalogue. The optical counterparts are identified as point-like objects with magnitudes in the range \~17-19. The optical spectra of three of the sources (IXO 32, 37 and 40) show the presence of emission lines typical of quasars. The position of these lines allows a precise estimation of their redshifts (2.769, 0.567 and 0.789 for IXO 32, 37 and 40 respectively). The fourth X-ray source, IXO35, is associated with a red object that has a spectrum typical of an M star in our Galaxy. These identifications are useful for building clean samples of ULX sources, selecting suitable targets for future observations and performing statistical studies on the different populations of X-ray sources.
No associations
LandOfFree
Optical Counterparts of Ultra Luminous X-ray Sources does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Optical Counterparts of Ultra Luminous X-ray Sources, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical Counterparts of Ultra Luminous X-ray Sources will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-567634