Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996a%26a...306..278c&link_type=abstract
Astronomy and Astrophysics, v.306, p.278
Astronomy and Astrophysics
Astrophysics
4
Stars: Activity, Stars: Late-Type, X-Ray: Stars, Stars: Individual: 1E 0315.7-1955, 1E 0505.0-0527, 1E 1127.9-1502
Scientific paper
Three serendipitous X-ray sources detected by the Einstein satellite were photometrically and spectroscopically observed during the course of a systematic study of known or suspected chromospherically active stars carried out at the European Southern Observatory (La Silla, Chile). Clear optical variability of the source 1E0315.7-1955 and 1E0505.0-0527 was discovered and their photometric periods computed. The data obtained for a third serendipitous source, 1E1127.9-1502, are also discussed. Spectral types, distances and X-ray fluxes have been estimated for all of the sources.
Cutispoto Giuseppe
Tagliaferri Giampiero
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