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[vsnet-obs 36076] SS Cyg observations in 2001 (ABG)


Norwegian Astronomical Society - Variable Star Section

SS Cygni observations during 2001 Jan 15 - 2001 Sep 23 UT

Observer: Birger Andresen (AAVSO-code ABG).
Location: Trondheim, Norway.
Instruments: 28.0-cm f/10 SCT (C280), 70-mm f/6.8 refractor (L70),
  20x80 binoculars (B20x80).
Magnitude references: V-magnitudes from Tycho-2 catalogue, CCD
  V-magnitudes by A. Henden, USNO.
Observations: Visual, Argelander step estimates.

Object   YYYYMMDD(UT)   Mag  Obs  Instrument  Observations     Ref
CYGSS    20010115.267   8.5  ABG  B20x80     V 1 C; V 3 D (2)  TYC2
CYGSS    20010115.760   8.3  ABG  B20x80     V 2 Y (class 2)   TYC2
CYGSS    20010116.243   8.3  ABG  B20x80     V 2 Y; V 4 C (2)  TYC2
CYGSS    20010116.760   8.0  ABG  B20x80     V 5 Y (cl. 2)     TYC2
CYGSS    20010117.807   8.2  ABG  B20x80     V 3 Y (cl. 2)     TYC2
CYGSS    20010118.250   8.4  ABG  B20x80     V 1 Y; V 4 C (2)  TYC2
CYGSS    20010118.788   8.4  ABG  B20x80     V 2 Y; V 5 C (2)  TYC2
CYGSS    20010120.708   8.4  ABG  B20x80     B 1 V; V 3 C (1)  TYC2
CYGSS    20010121.174   8.6  ABG  B20x80     B 2 V; V 4 D (1)  TYC2
CYGSS    20010121.710   8.6  ABG  B20x80     B 2 V; V 1 C (1)  TYC2
CYGSS    20010122.242   8.8  ABG  B20x80     C 1 V; V 3 D (1)  TYC2
CYGSS    20010125.731   9.6  ABG  B20x80     D 5 V; V 2 F (1)  TYC2
CYGSS    20010812.958   9.3  ABG  L70;60x    D 4 V; V 1 E (1)  TYC2
CYGSS    20010814.979  10.3  ABG  L70;60x    F 3 V; V = G (2)  TYC2
CYGSS    20010912.913  11.9: ABG  L70;60x    V = K (cl. 3)     Henden
CYGSS    20010916.868  12.0  ABG  C280;140x  K 1 V; V 3 L (1)  Henden
CYGSS    20010917.816  12.1  ABG  C280;140x  K 2 V; V 2 L (1)  Henden
CYGSS    20010921.944  12.1  ABG  C280;140x  K 2 V; V 2 L (1)  Henden
CYGSS    20010923.813  12.2  ABG  C280;140x  K 4 V; V 1 L (2)  Henden

Notes: SS Cygni was seen in outburst during Jan 15-25 and Aug 12-14.
Only Andresen's positive observations are included in this report.

Comparison stars (indent. by NAS.VSS, photometry from Tycho-1):
A = TYC 3196-1605 (V = 7.81); B = TYC 3196-1137 (V = 8.31);
Y = TYC 3196-0701 (V = 8.49); C = TYC 3196-1988 (V = 8.69);
D = TYC 3196-2202 (V = 9.06); E = TYC 3196-1227 (V = 9.40);
F = TYC 3196-0785 (V = 9.75); G = TYC 3196-1019 (V = 10.31);
H = TYC 3196-0857 (V = 10.86). [V-magnitudes are derived from
Tycho-2 VT and BT-magnitudes by using the method of M. Bessell
in Publ. Ast. Soc. Pacific, 112, 961 (2000).]

Comparison stars (identifications by NAS.VSS, photometry by Henden):
H = TYC 3196-0857 (V = 10.90); K = GSC 3196-0829 (V = 11.86);
L = GSC 3196-0831 (V = 12.28).

                                 Yours sincerely,
                                 Bjorn H. Granslo

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