Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aj....143...64j&link_type=abstract
The Astronomical Journal, Volume 143, Issue 3, article id. 64 (2012).
Astronomy and Astrophysics
Astronomy
Bl Lacertae Objects: General, Galaxies: Active, Galaxies: Seyfert, X-Rays: Galaxies
Scientific paper
Over the last decade, X-ray surveys have provided outstanding new results due to the lack of the common selection effects present at other wavelengths. Here, we have selected a sample of unidentified sources from the XMM-Newton Slew Survey Catalog, likely to be extragalactic. Five of them were observed with the XMM-Newton observatory. In this work, we present the results of the spectral analysis of these objects in the X-ray and optical bands. Only three of them had useful spectroscopic X-ray data, and follow up observations were carried out in the optical range to determine their coordinates, classification, and redshift. The sources are different types of active galactic nuclei (AGNs) with redshifts ranging from 0.059 to 0.386. The properties at both spectral ranges (X-rays and optical) are compatible with the common properties of their types of AGNs. Although the sources were selected by their hard X-ray properties, none of the three detected objects turned out to be an obscured AGN.
Chavushyan Vahram
Huerta E. M.
Jimenez-Bailon Elena
Krongold Yair
Santos-Lleo Maria
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