RASSASASEB ivo://nasa.heasarc/rassasaseb NASA/GSFC HEASARC Szczygiel et al. 2026-10-09 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Survey Source The authors have combined their catalog of eclipsing binaries from the All-Sky Automated Survey (ASAS) with the ROSAT All-Sky Survey (RASS) Bright and Faint Source Catalogs (RASSBSC and RASSFSC). The combination using a matching radius of 50 arcseconds results in 836 eclipsing binaries that display coronal activity and is the largest sample of active binary stars assembled to the date of publication. By using the (V-I) colors of the ASAS eclipsing binary catalog, the authors are able to determine the distances and thus bolometric luminosities for the majority of eclipsing binaries that display significant stellar activity. A typical value for the ratio of soft X-ray to bolometric luminosity is L<sub>X</sub>/L<sub>bol</sub> ~ a few x 10<sup>-4</sup>, similar to the ratio of soft X-ray to bolometric flux F<sub>X</sub>/F<sub>bol</sub> in the most active regions of the Sun. Unlike rapidly rotating isolated late-type dwarfs - stars with significant outer convection zones - a tight correlation between Rossby number and activity of eclipsing binaries is absent. The authors find evidence for the saturation effect and marginal evidence for the so-called "super-saturation" phenomena. Their work shows that wide-field stellar variability searches can produce a high yield of binary stars with strong coronal activity. The authors expect that only 1.4% (i.e., 12 out of 836) of the matches between the ASAS eclipsing binary and RASS sources will be false given their maximum angular separation criterion of 50 arcseconds. This Browse table excludes 29 contact binaries for which the separate distance estimates made by the authors using the source V-band and I-band magnitudes differed by more than 20%, and hence contains 807 (836 - 29) eclipsing and X-ray emitting binary systems. Complete information on ASAS and its freely accessible data are available at the ASAS web site: <a href="http://www.astrouw.edu.pl/asas/">http://www.astrouw.edu.pl/asas/</a>. This table was created by the HEASARC in July 2010 based on <a href="https://cdsarc.cds.unistra.fr/ftp/cats/J/AcA/58/405">CDS catalog J/AcA/58/405</a> file catalog.dat. This is a service provided by NASA HEASARC . 2008AcA....58..405S https://heasarc.gsfc.nasa.gov/W3Browse/all/rassasaseb.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=rassasaseb& GET text/xml 180 99999 true 32.40208333 -85.30305556 0.0333333333333333 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=rassasaseb GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_rassasaseb&Action=More+Options&Action=Parameter+Search&ConeAdd=1 STAR CATALOG 0.0333333333333333 Optical X-ray public rassasaseb RASS/All-Sky Automated Survey Eclipsing Binaries Catalog asas_name ASAS Source Identification (ASAS JHHMMSS+DDMM.m) meta.id;meta.main char nullable name RASS Source Identification (1RXS JHHMMSS.s+DDMM.m) meta.id.cross char nullable ra RASS Source Right Ascension degree pos.eq.ra;meta.main double nullable dec RASS Source Declination degree pos.eq.dec;meta.main double nullable off_set Angular Separation of Sources (arcsec) arcsec pos.angDistance;em.X-ray;em.opt double nullable period Orbital Period of the Binary d time.period;src.orbital double nullable max_vmag V-Band Brightness at Maximum Light mag phot.mag;em.opt.V;stat.max double nullable log_lx Logarithm of the X-Ray Luminosity log(erg/s) double nullable log_rossby_number Logarithm of the Rossby Number time.period;arith.ratio double nullable bii RASS Source Galactic Latitude degree pos.galactic.lat double nullable class Browse Object Classification src.class short nullable alt_name Other Identification (Mainly from GCVS) meta.id.assoc char nullable rass_count_rate_error ROSAT Count Rate Error ct/s stat.error;phot.count;em.X-ray.soft double nullable binary_type ASAS Classification of Variability: EC=contact, ESD=semi-detached, ED=detached src.class char nullable hardness_ratio Hardness Ratio phot.flux;arith.ratio;em.X-ray double nullable rass_count_rate ROSAT Count Rate ct/s phot.count;em.X-ray.soft double nullable max_imag I-Band Brightness at Maximum Light mag phot.mag;em.opt.I;stat.max double nullable log_lbol Logarithm of the Bolometric Luminosity log(erg/s) double nullable "distance" Distance to an Object pc pos.distance double nullable lii RASS Source Galactic Longitude degree pos.galactic.lon double nullable hardness_ratio_error Hardness Ratio Error stat.error;phot.flux;arith.ratio;em.X-ray double nullable minimum_epoch Date of the Epoch of Minimum mjd time.epoch;stat.min 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