Cha X-ray sources & optical identifications (Alcala+ 1995)

Details Cha X-ray sources & optical identifications (Alcala+ 1995) Cha X-ray sources & optical identifications (Alcala+ 1995)

Oct 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996ycat..41140109a&link_type=abstract

VizieR On-line Data Catalog: J/A+AS/114/109. Originally published in: 1995A&AS..114..109A

Computer Science

X-Ray Sources, Qsos

Scientific paper

We present the observations of the ROSAT all-sky survey (RASS) in the direction of the Chamaeleon cloud complex, as well as the spectroscopic identifications of 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 λ6707 absorption, spectral type later than F0 and chromospheric emission. We give coordinates and count rates of the X-ray sources, and present optical spectra and finding charts for the sources identified optically as new pre-main sequence stars. Optical UBV(RI)c and near-infrared JHKLM photometry for this sample of stars is also provided. In addition, 6 new dKe-dMe candidates are found among the RASS sources. (1 data file).

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