The astrometric Gaia-FUN-SSO observation campaign of 99 942 Apophis

Autor: Thuillot, W., Bancelin, D., Ivantsov, A., Desmars, J., Assafin, M., Eggl, S., Hestroffer, D., Rocher, P., Carry, B., David, P., Abe, L., Andreev, M., Arlot, J. -E., Asami, A., Ayvasian, V., Baransky, A., Belcheva, M., Bendjoya, Ph., Bikmaev, I., Burkhonov, O. A., Camci, U., Carbognani, A., Colas, F., Devyatkin, A. V., Ehgamberdiev, Sh. A., Enikova, P., Eyer, L., Galeev, A., Gerlach, E., Godunova, V., Golubaev, A. V., Gorshanov, D. L., Gumerov, R., Hashimoto, N., Helvaci, M., Ibryamov, S., Inasaridze, R. Ya., Khamitov, I., Kostov, A., Kozhukhov, A. M., Kozyryev, Y., Krugly, Yu. N., Kryuchkovskiy, V., Kulichenko, N., Maigurova, N., Manilla-Robles, A., Martyusheva, A. A., Molotov, I. E., Nikolov, G., Nikolov, P., Nishiyama, K., Okumura, S., Palaversa, L., Parmonov, O., Peng, Q. Y., Petrova, S. N., Pinigin, G. I., Pomazan, A., Rivet, J. -P., Sakamoto, T., Sakhibullin, N., Sergeev, O., Sergeyev, A. V., Shulga, O. V., Suarez, O., Sybiryakova, Y., Takahashi, N., Tarady, V., Todd, M., Urakawa, S., Uysal, O., Vaduvescu, O., Vovk, V., Zhang, X. -L.

Astrometric observations performed by the Gaia Follow-Up Network for Solar System Objects (Gaia-FUN-SSO) play a key role in ensuring that moving objects first detected by ESA's Gaia mission remain recoverable after their discovery. An observation cam

Externí odkaz: http://arxiv.org/abs/1510.00509

The field high-amplitude SX Phe variable BL Cam: results from a multisite photometric campaign. II. Evidence of a binary - possibly triple - system

Autor: Fauvaud, S., Sareyan, J. -P., Ribas, I., Rodríguez, E., Lampens, P., Klingenberg, G., Farrell, J. A., Fumagalli, F., Simonetti, J. H., Wolf, M., Santacana, G., Zhou, A. -Y., Michel, R., Fox-Machado, L., Alvarez, M., Nava-Vega, A., López-González, M. J., Casanova, V. M., Aceituno, F. J., Scheggia, I., Rives, J. -J., Hintz, E. G., Van Cauteren, P., Helvaci, M., Yesilyaprak, C., Graham, K. A., Král, L., Kocián, R., Kučáková, H., Fauvaud, M., Granslo, B. H., Michelet, J., Nicholson, M. P., Vugnon, J. -M., Kotková, L., Truparová, K., Ulusoy, C., Yasarsoy, B., Avdibegovic, A., Blauzek, M., Kliner, J., Zasche, P., Bartošíková, S., Vilášek, M., Trondal, O., Abbeel, F. Van Den, Behrend, R., Wücher, H.

Short-period high-amplitude pulsating stars of Population I ($\delta$ Sct stars) and II (SX Phe variables) exist in the lower part of the classical (Cepheid) instability strip. Most of them have very simple pulsational behaviours, only one or two rad

Externí odkaz: http://arxiv.org/abs/1004.2748

New absolute magnitude calibrations for detached binaries

Autor: Bilir, S., Ak, T., Soydugan, E., Soydugan, F., Yaz, E., Ak, N. Filiz, Eker, Z., Demircan, O., Helvaci, M.

Lutz-Kelker bias corrected absolute magnitude calibrations for the detached binary systems with main-sequence components are presented. The absolute magnitudes of the calibrator stars were derived at intrinsic colours of Johnson-Cousins and 2MASS (Tw

Externí odkaz: http://arxiv.org/abs/0806.1290

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Long-term variations and periods of Mira stars from ROTSE–IIId

Autor: Yeşilyaprak, C., Yerli, S.K., Güçsav, B.B., Aksaker, N., Dikicioğlu, E., Helvacı, M., Çoker, D., Aydın, M.E., Dinçel, B., Uzun, N.

Publikováno v: In New Astronomy July 2012 17(5):504-513