Lockman Hole AGN Optical and Infrared Properties Catalog

Lockman Hole AGN Optical and Infrared Properties Catalog LOCKMANOIR ivo://nasa.heasarc/lockmanoir NASA/GSFC HEASARC Rovilos et al. 2026-10-09 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Survey Source This table contains the observed-frame optical, near-infrared, and mid-infrared properties of X-ray-selected active galactic nuclei (AGN) in the Lockman Hole. Using a likelihood ratio method on optical, near-infrared or mid-infrared catalogs, the authors assigned counterparts to 401 out of the 409 X-ray sources of the XMM-Newton catalog (Brunner et al. 2008, A&A, 479, 283). Accurate photometry was collected for all the sources from U to 24 microns. The authors used X-ray and optical criteria to remove any normal galaxies, galactic stars, or X-ray clusters among them and studied the multi-wavelength properties of the remaining 377 AGN in their paper. They used a mid-IR colour-colour selection to understand the AGN contribution to the optical and infrared emission. Using this selection, they identified different behaviours of AGN-dominated and host-dominated sources in X-ray-optical-infrared color-color diagrams. More specifically, the AGN-dominated sources show a clear trend in the fx/fRC vs. RC - K and f24um/fRC vs. RC - K diagrams, while the hosts follow the behaviour of non-X-ray detected galaxies. In the optical-near-infrared color-magnitude diagram, the known trend of redder objects to be more obscured in X-rays is seen to be stronger for AGN-dominated than for host-dominated systems. This is an indication that the trend is more related to the AGN, which contaminate the overall colors, than to any evolutionary effects, the authors believe. Finally, the authors find that a significant fraction (~30%) of the reddest AGN are not obscured in X-rays. The X-ray observations of the Lockman Hole took place between April 2000 and December 2002 with XMM-Newton. The optical observations of the Lockman Hole were conducted with the Large Binocular Telescope (U, B, V bands) and the Subaru Telescope (RC, IC, z' bands). The LBT observations were taken from February 2007 to March 2009. The RC, IC, and z' bands have been observed with the Suprime-Cam of the Subaru telescope between November 2001 and April 2002. This table contains the properties of the counterparts to all 409 X-ray sources listed in the Lockman Hole XMM-Newton source catalog of Brunner et al. (2008, A&A, 479, 283), including the 377 AGN and also the 32 objects classified as Galactic stars, galaxy clusters or galaxies. For 8 (2%) of the 409 X-ray sources no optical or IR counterparts were found. These 8 objects are listed in this table with null positional values. This table was created by the HEASARC in January 2012 based on <a href="https://cdsarc.cds.unistra.fr/ftp/cats/J/A+A/529/A135">CDS Catalog J/A+A/529/A135</a> file table2.dat. This is a service provided by NASA HEASARC . 2011A&A...529A.135R https://heasarc.gsfc.nasa.gov/W3Browse/all/lockmanoir.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=lockmanoir& GET text/xml 180 99999 true 163.256776 57.249698 0.0166666666666667 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=lockmanoir GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_lockmanoir&Action=More+Options&Action=Parameter+Search&ConeAdd=1 XMM-NEWTON 0.0166666666666667 Infrared Optical X-ray public lockmanoir Lockman Hole AGN Optical and Infrared Properties Catalog name Source Designation meta.id;meta.main char nullable ra Right Ascension degree pos.eq.ra;meta.main double nullable dec Declination degree pos.eq.dec;meta.main double nullable flux Flux in (0.5-10)keV Band erg/s/cm^2 phot.flux;em.X-ray double nullable log_lx Logarithm of the X-Ray Luminosity in (0.5-10)keV Band log(erg/s) phys.luminosity;em.X-ray double nullable log_flux_fk_limit Limit Flag for the Logarithm of the X-Ray to K Optical Flux Ratio meta.code;phot.flux;arith.ratio;em.X-ray;em.IR.K char nullable log_flux_fk Logarithm of the X-Ray to K Optical Flux Ratio phot.flux;arith.ratio;em.X-ray;em.IR.K double nullable rk_color_limit Limit Flag for the Johnson-Cousins R-K Color Index meta.code;phot.color;em.opt.R;em.IR.K char nullable rk_color Johnson-Cousins R-K Color Index mag phot.color;em.opt.R;em.IR.K double nullable redshift Redshift src.redshift double nullable "__x_ra_dec" System unit vector column double nullable "__y_ra_dec" System unit vector column double nullable "__z_ra_dec" System unit vector column double nullable "__row" System index column char nullable ref_redshift Reference Code for Source of Redshift Value meta.ref;src.redshift char nullable log_flux_fr Logarithm of the X-Ray to Rc Optical Flux Ratio phot.flux;arith.ratio;em.X-ray;em.opt.R double nullable ref_position Reference Code for Source of Position meta.ref;pos short nullable source_number Sequential Identification Number for Each Source in Catalog meta.id;src short nullable s_3p6_4p5_um_color IRAC [3.6]-[4.5] Color Index mag phot.color;em.IR.3-4um;em.IR.4-8um double nullable log_f24_um_fr_limit Limit Flag for the Logarithm of the 24-Micron to Rc Optical Flux Ratio meta.code;phot.flux;arith.ratio;em.IR.15-30um;em.opt.R char nullable s_5p8_8p0_um_color IRAC [5.8]-[8.0] Color Index mag phot.color;em.IR.4-8um double nullable log_f24_um_fr Logarithm of the 24-Micron to Rc Optical Flux Ratio phot.flux;arith.ratio;em.IR.15-30um;em.opt.R double nullable notes Notes meta.note char nullable hardness_ratio Hardness Ratio phot.flux;arith.ratio;em.X-ray double nullable log_flux_fr_limit Limit Flag for the Logarithm of the X-Ray to Rc Optical Flux Ratio meta.code;phot.flux;arith.ratio;em.X-ray;em.opt.R char nullable lii Galactic Longitude degree pos.galactic.lon double nullable bii Galactic Latitude degree pos.galactic.lat double nullable