CEPAXMM ivo://nasa.heasarc/cepaxmm NASA/GSFC HEASARC Pravdo, Tsuboi 2026-10-09 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Survey Source Cepheus A is a star formation region (SFR) at a distance of ~ 730 pc consisting of two main H II regions, Cep A East and Cep A West. Cep A was observed with the EPIC cameras of the XMM-Newton observatory on 2003 August 23 for 43.9ks. In this observation, X-rays from both components of Cep A, East and West, were discovered by XMM-Newton, as well as from the Herbig-Haro object HH 168, which joins the ranks of other energetic H-H objects that are sources of temperature T >= 10<sup>6</sup> K X-ray emission. A total of 102 distinct X-ray sources were detected in this 44 ks observation, many presumed to be pre-main-sequence stars on the basis of the reddening of their optical and IR counterparts, the latter being found by matching the positions of the 102 X-ray sources with objects in the USNO-B1.0 (Monet et al. 2003, AJ, 125, 984) and Two Micron All Sky Survey (2MASS) catalogs using a 2.5" matching radius. The authors performed source detection on all the XMM-Newton data in two energy bands: 0.2 - 1 keV ("soft") and 1 - 10 keV ("hard"). They detected 24 soft sources and 85 hard sources. Seven of the sources appear in both bands, where the criterion for a match between the bands is a positional offset of < 2.5 arcseconds. Thus, the total number of distinct X-ray sources detected (and listed in this table) is 102. This table was created by the HEASARC in July 2007 based on the <a href="https://cdsarc.cds.unistra.fr/ftp/cats/J/ApJ/626/272">CDS Catalog J/ApJ/626/272</a> file table2.dat. This is a service provided by NASA HEASARC . 2005ApJ...626..272P https://heasarc.gsfc.nasa.gov/W3Browse/all/cepaxmm.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=cepaxmm& GET text/xml 180 99999 true 344.1906 61.8689 0.0166666666666667 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=cepaxmm GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_cepaxmm&Action=More+Options&Action=Parameter+Search&ConeAdd=1 XMM-NEWTON 0.0166666666666667 Optical X-ray public cepaxmm Cepheus A SFR XMM-Newton X-Ray Point Source Catalog name XMMPT 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 sb_count_rate Soft Count Rate (0.2-1 keV) ct/s phot.count;em.X-ray.soft double nullable hb_count_rate Hard Count Rate (1-10 keV) ct/s phot.count;em.X-ray.medium double nullable twomass_name 2MASS Name meta.id char nullable jmag J Magnitude mag phot.mag;em.IR.J double nullable hmag H Magnitude mag phot.mag;em.IR.H double nullable imag I Magnitude mag phot.mag;em.opt.I double nullable usnob1_name USNO-B1.0 Name meta.id char nullable alt_name Note meta.id char nullable bmag B Magnitude mag phot.mag;em.opt.B double nullable bii Galactic Latitude degree pos.galactic.lat double nullable lii Galactic Longitude degree pos.galactic.lon double nullable snr Signal-to-Noise Ratio stat.snr;em.X-ray double nullable ks_mag K_s Magnitude mag phot.mag;em.IR.K double nullable rmag R Magnitude mag phot.mag;em.opt.R 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