RASS/Cham ivo://nasa.heasarc/chasfrxray NASA/GSFC HEASARC Alcala et al. 2026-10-09 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Star This catalog contains a source list derived from observations of the ROSAT all-sky survey (RASS) in the direction of the Chamaeleon star-forming region cloud complex, as well as spectroscopic identifications for the detected X-ray sources. The main purpose of this identification program was the search for low-mass pre-main sequence stars. Sixteen previously known PMS stars were detected with high confidence by ROSAT: eight are classical T Tauri stars and eight are weak-line T Tauri stars. Seventy-seven new weak-line T Tauri stars were identified on the basis of the presence of strong Li 6707 Angstrom absorption, a spectral type later than F0, and chromospheric emission. In addition, 6 new dKe-dMe candidates were found among the RASS sources. Coordinates and count rates are given for all of the X-ray sources. This online catalog was created by the HEASARC in September 1999 based on a machine-readable table obtained from the ADC/CDS data centers (J/A+AS/114/109). This is a service provided by NASA HEASARC . 1995A&AS..114..109A https://heasarc.gsfc.nasa.gov/W3Browse/all/chasfrxray.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=chasfrxray& GET text/xml 180 99999 true 151.9221 -85.0778 0.0333333333333333 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=chasfrxray GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_chasfrxray&Action=More+Options&Action=Parameter+Search&ConeAdd=1 STAR CATALOG 0.0333333333333333 X-ray public chasfrxray ROSAT All-Sky Survey: Chamaeleon Star Forming Region Study name RXJ X-Ray 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 count_rate Count Rate ct/s phot.count;em.X-ray float nullable bii Galactic Latitude degree pos.galactic.lat double nullable spect_type Spectral Type src.spType char nullable count_rate_error Count Rate Uncertainty ct/s stat.error;phot.count;em.X-ray float nullable optical_id Optical Identification meta.id.cross char nullable note Notes on Optical Counterpart meta.note;src.class char nullable refs References meta.ref char nullable object_type Object Type src.class char nullable class Browse Object Classification src.class short nullable lii Galactic Longitude degree pos.galactic.lon 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 off_set X-Ray-Optical offset (arcsec) arcsec pos.angDistance short nullable