NAPEXMMCXO ivo://nasa.heasarc/napexmmcxo NASA/GSFC HEASARC Damiani et al. 2026-10-09 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Survey Source This table contains some of the results from the first extensive X-ray study of the North-America and Pelican star-forming region (NGC 7000/IC 5070), with the aim of finding and characterizing the young population of this cloud. X-ray data from Chandra (four pointings) and XMM-Newton (seven pointings) were reduced and source detection algorithm applied to each image. The authors complement the X-ray data with optical and near-IR data from the IPHAS, UKIDSS, and 2MASS catalogs, and with other published optical and Spitzer IR data. More than 700 X-ray sources are detected, the majority of which have an optical or NIR counterpart. This allowed the authors to identify young stars in different stages of formation. Less than 30% of the X-ray sources are identified with a previously known young star. the authors argue that most X-ray sources with an optical or NIR counterpart, except perhaps for a few tens at near-zero reddening, are likely candidate members of the star-forming region, on the basis of both their optical and NIR magnitudes and colors, and of their X-ray properties such as spectral hardness or flux variations. They are characterized by a wide range of extinction, and sometimes near-IR excesses, both of which prevent derivation of accurate stellar parameters. The optical color-magnitude diagram suggests ages between 1-10 Myr. The X-ray members have a very complex spatial distribution with some degree of subclustering, qualitatively similar to that of previously known members. The detailed distribution of X-ray sources relative to the objects with IR excesses identified with Spitzer is sometimes suggestive of sequential star formation, especially near the 'Gulf of Mexico' region, probably triggered by the O5 star which illuminates the whole region. The authors confirm that around the O5 star no enhancement in the young star density is found, in agreement with previous results. Thanks to the precision and depth of the IPHAS and UKIDSS data used, the authors also determine the local optical-IR reddening law, and compute an updated reddening map of the entire region. This table contains the catalog of X-ray sources, with their optical and near-IR identifications, in the NGC 7000/IC 5070 (North America/Pelican) star formation complex. The final X-ray source list comprises 721 objects, of which there are 378 ACIS detections (of which 34 have an XMM-Newton counterpart), and 343 XMM-Newton-only detection. The chosen detection threshold, corresponding to approximately one spurious detection per field, ensures that no more than approximately ten of the 721 detections are spurious. The 11 XMM-Newton and Chandra fields analyzed in this study are listed in Tables 1 and 2, respectively, of the reference paper. This table was created by the HEASARC in July 2017 based on <a href="https://cdsarc.cds.unistra.fr/ftp/cats/J/A+A/602/A115">CDS Catalog J/A+A/602/A115</a> file table3.dat, the list of detected X-ray sources in the North America (NGC 7000) & Pelican Nebulae (IC 5070), and file table4.dat, the list of optical and near-IR photometric information for the counterparts of these X-ray sources. It does not contain table5.dat, the list of X-ray undetected stars that have IR or H-alpha excesses. This is a service provided by NASA HEASARC . 2017A&A...602A.115D https://heasarc.gsfc.nasa.gov/W3Browse/all/napexmmcxo.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=napexmmcxo& GET text/xml 180 99999 true 314.21659 43.55931 0.0166666666666667 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=napexmmcxo GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_napexmmcxo&Action=More+Options&Action=Parameter+Search&ConeAdd=1 XMM-NEWTON 0.0166666666666667 Infrared Optical X-ray public napexmmcxo North America (NGC 7000) & Pelican (IC 5070) Nebulae X-Ray Sourc source_number Sequential Identification Number for Each Source in the Catalog meta.id;src short nullable 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 error_radius Position Error of X-Ray Source arcsec stat.error;pos double nullable count_rate X-Ray Count Rate ct/s phot.count;em.X-ray double nullable count_rate_error Error in X-Ray Count Rate ct/s stat.error;phot.count;em.X-ray double nullable log_lx Logarithm of X-Ray Luminosity log(erg/s) phys.luminosity;em.X-ray double nullable imag Magnitude in i Band from IPHAS mag phot.mag;em.opt.I double nullable jmag Magnitude in J Band from UKIDSS/2MASS mag phot.mag;em.IR.J double nullable acis_hardness_ratio_1 Hardness Ratio 1 for Chandra ACIS Sources phot.flux;arith.ratio;em.X-ray double nullable ir_excess_flag Flag [Y] Indicates Star with NIR Excess meta.note;phot.color.excess;em.IR char nullable xmm_hardness_ratio_1 Hardness Ratio 1 for XMM EPIC Sources phot.flux;arith.ratio;em.X-ray double nullable xmm_name Designation of XMM X-Ray Detection (XMMU JHHMMSS.s+DDMMSS) (3XMM-DR6) meta.id char nullable halpha_emission_flag Flag [Y] Indicates Star with H-Alpha Emission meta.note;phot.color;em.line.Halpha char nullable bii Galactic Latitude degree pos.galactic.lat double nullable kmag Magnitude in K Band from UKIDSS/2MASS mag phot.mag;em.IR.K double nullable acis_hardness_ratio_2 Hardness Ratio 2 for Chandra ACIS Sources phot.flux;arith.ratio;em.X-ray double nullable hmag Magnitude in H Band from UKIDSS/2MASS mag phot.mag;em.IR.H double nullable ri_color Color Index r-i from IPHAS mag phot.color;em.opt.R;em.opt.I double nullable rgs2011_source_number Sequential Number in Rebull et al. (2011, Cat. J/ApJS/193/25) meta.id.cross short nullable xmm_hardness_ratio_2 Hardness Ratio 2 for XMM EPIC Sources phot.flux;arith.ratio;em.X-ray double nullable lii Galactic Longitude degree pos.galactic.lon double nullable r_halpha_color Color Index r-Halpha from IPHAS mag phot.color;em.opt.R;em.line.Halpha double nullable cxo_name Designation of Chandra X-Ray Detection (CXOU JHHMMSS.s+DDMMSS) meta.id char 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