A Deep XMM-Newton Serendipitous Survey of a middle-latitude area. II. New deeper X-ray and optical observations - Astrophysics > High Energy Astrophysical PhenomenaReportar como inadecuado




A Deep XMM-Newton Serendipitous Survey of a middle-latitude area. II. New deeper X-ray and optical observations - Astrophysics > High Energy Astrophysical Phenomena - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Abstract: The radio-quiet neutron star 1E1207.4-5209 has been the target of severalXMM-Newton observations, with a total exposure of ~350 ks. The source islocated at intermediate galactic latitude b~10 degrees, i.e. in a sky regionwith an extremely interesting mix of both galactic and extra-galactic X-raysources. The aim of our work is to investigate the properties of both theintermediate-latitude galactic and extra-galactic X-ray source populations inthe 1E1207.4-5209 field. We performed a coherent analysis of the wholeXMM-Newton observation data set to build a catalogue of serendipitous X-raysources detected with high confidence and to derive information on the sourceflux, spectra, and time variability. In addition, we performed a completemulti-band UBVRI optical coverage of the field with the Wide Field ImagerWFI of the ESO-MPG 2.2m telescope La Silla to search for candidate opticalcounterparts to the X-ray sources, down to a V-band limiting magnitude of~24.5. We detected a total of 144 serendipitous X-ray sources. Thanks to therefined X-ray positions and to the WFI observations, we found candidate opticalcounterparts for most of the X-ray sources in our compilation. For most of thebrightest ones we proposed a likely classification based on both the X-rayspectra and the optical colours. Our results indicate that at intermediategalactic latitude the X-ray source population is dominated by theextra-galactic component, but with a significant contribution from the galacticcomponent in the soft energy band, below 2 keV.



Autor: G. Novara INAF-IASF Milano, N. La Palombara INAF-IASF Milano, R. P. Mignani MSSL University College London, E. Hatziminaoglou ESO

Fuente: https://arxiv.org/







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