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Table 3

Photoelectric observations of Y Cyg.

Source Station Epoch No. of obs. No. of HDcomp./ Passbands
No. (RJD) U/B/V nights HDcheck used

1 74 33 827.3–36 071.4 347 49 198820/197419 no filter ef. 4200 Å
2 76 36 808.4–37 589.4 155/29 7/2 198692/199007 filters 4550 and 6000 Å
3 71 39 712.3–40 528.4 21/104/104 10 199007/ – UBV
3 19 41 119.4–41 154.5 48 5 199007/ – UBV
3 42 41 145.8–41 190.8 7 3 199007/ – UBV
3 75 41 159.4–41 193.5 24/23 8 199007/ – BV
3 72 41 169.7–42 577.9 90/87/103 4/4/5 199007/ – UBV
4 70 44 081.4–44 083.7 127 2 199007/ – B
7 94 47 769.4–47 788.5 60 6 199007/ – V
5 61 47 890.4–49 040.7 141 36 all-sky V
6 77 48 040.1–48 042.8 33 3 all-sky V (IUE FES sensor)
7 54 48 178.3–48 182.3 140 5 199007/ – V
8 01 51 371.6–51 377.4 10 4 204403/202349 UBV
8 01 51 379.4–51 448.3 141 13 202349/204403 UBV
8 01 54 011.3–54 020.5 93 5 202349/199007, 198820 UBV
8 01 55 113.3–55 126.4 65 13 199007/198692, 198820 UBV
8 16 51 452.6–51 457.8 79 6 204403/199007 UBV
8 16 53 628.6–53 667.8 54 12 204403/199007 UBV
8 16 54 008.8–54 070.6 85 10 204403/199007 UBV
8 16 54 270.8–54 285.9 79 22 204403/199007 UBV
8 78 51 477.0–51 539.0 111 4 199007/204403 UBV
8 02 54 025.2–54 405.3 258 3 199007/– BVR

Notes. Abbreviations used in Col. 1: 1) Magalashvili & Kumsishvili (1959); 2) Herczeg (1972); 3) O’Connell (1977); 4) Giménez & Costa (1980); 5) Perryman & ESA (1997); 6) Stickland et al. (1992); 7) Mossakovskaya (2003); 8) this paper. Abbreviations used in Col. 2 (numbers are running numbers of the observing stations from the Praha/Hvar data archives): 01) Hvar 0.65 m reflector, photoelectric photometer; 02) Brno private observatory of P. Svoboda, Sonnar 0.135 m photographic lens and a CCD SBIG 7 camera; 16) Four College 0.80 m APT; 19) Abastumani 0.48 m; 42) Dyer Observatory 0.61 m Seyfert reflector, 1P21 tube; 54) Crimean 0.60 m reflector, EMI 9789 tube; 61) Hipparcos Hp magnitude transformed to Johnson V after Harmanec (1998); 70) Mojon de Trigo 0.32 m Cassegrain, EMI 6256 A tube; 71) Vatican 0.60 m Cassegrain, 1P21 tube; 72) Dominion Astrophysical Observatory 0.30 m, EMI 6256SA tube; 74) Abastumani 0.33 m; 75) Tübingen 0.40 m reflector; 76) Hoher List 0.35 m reflector; 77) International Ultraviolet Explorer: the fine error sensor 78) Sejong 0.40 m reflector; 94) Kazan station of the SAO 0.48 m reflector.

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