A coordinated campaign of simultaneous X-ray and ground-based photometric and spectroscopic observations of X Persei = 3U 0352 + 30 was organized from February 14 to March 2, 1977. The optical observations show little photometric activity, a less marked Balmer excess than in 1971-72, weaker emission than in 1970, and a nearly normal intrinsic color. The H-alpha emission is double with R about equal to V. No clear correlation with the X-ray emission was found, except for the lower intensity probably related to a lower 'activity' of the optical source. A best-fit heliocentric X-ray period of 835.05 + or - 0.15 is found.
de Loore C, Altamore A, Bartta G B, Bunner A N, Divan L, Dioazan V, et al. (1979). First Coordinated Campaign of X-ray and ground based observations of X-Persei=3U 0352+30. ASTRONOMY & ASTROPHYSICS, 78, 287-291.
Titolo: | First Coordinated Campaign of X-ray and ground based observations of X-Persei=3U 0352+30 | |
Autori: | ||
Data di pubblicazione: | 1979 | |
Rivista: | ||
Citazione: | de Loore C, Altamore A, Bartta G B, Bunner A N, Divan L, Dioazan V, et al. (1979). First Coordinated Campaign of X-ray and ground based observations of X-Persei=3U 0352+30. ASTRONOMY & ASTROPHYSICS, 78, 287-291. | |
Abstract: | A coordinated campaign of simultaneous X-ray and ground-based photometric and spectroscopic observations of X Persei = 3U 0352 + 30 was organized from February 14 to March 2, 1977. The optical observations show little photometric activity, a less marked Balmer excess than in 1971-72, weaker emission than in 1970, and a nearly normal intrinsic color. The H-alpha emission is double with R about equal to V. No clear correlation with the X-ray emission was found, except for the lower intensity probably related to a lower 'activity' of the optical source. A best-fit heliocentric X-ray period of 835.05 + or - 0.15 is found. | |
Handle: | http://hdl.handle.net/11590/136574 | |
Appare nelle tipologie: | 1.1 Articolo in rivista |