SIMBAD references

Photoelectric observations at 5500A have been conducted on the Lb carbon star TX Psc as part of the AAVSO Small Amplitude Red Variable program; the observed light curve from 1990 through 1995 indicates a semiregular variation with a cycle length of approximately 220 days, rather than complete irregularity. Photoelectric (V) observations were also made on the SRc variable alpha Her A; a beat period of 277 days with an amplitude of 0.8 magnitude was found. The Mira-type variables o Cet and RT Cyg have recently been observed in V and three narrow-band filters in the near infrared.
Result. from the first two months of observations are shown.