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pro vyhledávání: '"Cédric Lauzeral"'
Publikováno v:
Astrophysics and Space Science Library ISBN: 9789401043410
AKO 9 is the hottest star (U-B < -0.3) found by (1989) in the error box for X0021.8-7221 on four U frames of 47 Tuc obtained at the 2.2m ESO (La Silla) telescope in 1986 July 26. This star appeared to be invisible on observations obtained in 1989 (Ba
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::34093dd596186db6a74109335954f2d7
https://doi.org/10.1007/978-94-011-0794-5_94
https://doi.org/10.1007/978-94-011-0794-5_94
ROSAT Observations G. HASINGER Max-Planck-Institut flir extraterrestrische Physik, D-85740 Garching, Germany Abstract. This review describes the most recent advances in the study of the extragalactic soft X-ray background and what we can learn about