L. Piro, Istituto TESRE, Bologna; A. Cassatella, IUE Observatory, Villafranca; L. Spinoglio and R. Viotti, Istituto Astrofisica Spaziale, Frascati; and A. Altamore, Istituto Astronomico, Rome, telex: "We detected x-ray emission from the high-velocity symbiotic star AG Dra at minimum phase. The star was observed with EXOSAT on June 5. Using a bremsstrahlung model with log nH = 20.2, we find kT = 24 eV and a 0.2-1.0-keV flux of 3.4 x 10**-16 J m**-2 s**-1. Coordinated IUE observations on June 9 showed an ultraviolet spectrum typical of minimum phase. There was no ultraviolet contamination of EXOSAT fluxes. The fine-error-sensor magnitude was 9.8. Infrared photometry on May 2 and 23 gave: J = 7.12, H = 6.36, K = 6.27, confirming that the K star is substantially stable."
Piro, L., Cassatella, A., Spinoglio, L., Viotti, R., Altamore, A. (1985). AG Draconis. CIRCULAR - CENTRAL BUREAU FOR ASTRONOMICAL TELEGRAMS, INTERNATIONAL ASTRONOMICAL UNION.
AG Draconis
ALTAMORE, Aldo
1985-01-01
Abstract
L. Piro, Istituto TESRE, Bologna; A. Cassatella, IUE Observatory, Villafranca; L. Spinoglio and R. Viotti, Istituto Astrofisica Spaziale, Frascati; and A. Altamore, Istituto Astronomico, Rome, telex: "We detected x-ray emission from the high-velocity symbiotic star AG Dra at minimum phase. The star was observed with EXOSAT on June 5. Using a bremsstrahlung model with log nH = 20.2, we find kT = 24 eV and a 0.2-1.0-keV flux of 3.4 x 10**-16 J m**-2 s**-1. Coordinated IUE observations on June 9 showed an ultraviolet spectrum typical of minimum phase. There was no ultraviolet contamination of EXOSAT fluxes. The fine-error-sensor magnitude was 9.8. Infrared photometry on May 2 and 23 gave: J = 7.12, H = 6.36, K = 6.27, confirming that the K star is substantially stable."I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
