February 11, 2022
AAVSO Forum threads (scroll to the bottom of a thread for latest posts):
- Campaigns and Observing Reports: https://www.aavso.org/vy-scl-stars-too-campaign
- Cataclysmic Variables: https://www.aavso.org/vy-scl-stars-too-campaign-01
- Spectroscopy: https://www.aavso.org/vy-scl-stars-too-campaign-02
Note: Please continue to monitor these targets per the instructions below. - Elizabeth O. Waagen, October 31, 2022
September 14, 2021
October 22, 2007: The Microvariability and Oscillations of Stars (MOST) Satellite will conduct a targeted photometric observing campaign on the cataclysmic variable TT Ari, beginning 2007 October 23 UT (JD 2454397) and concluding on 2007 October 28 (JD 2454402). This observing program was proposed by a group of Austrian amateur astronomers who proposed to the "MOST fuer Alle" program of the University of Vienna, the Austrian partner project of the MOST collaboration's "My Own Space Telescope" program for Canadian observers.
November 17, 2008
July 10, 2015: The novalike/VY Scl variable V380 Oph is in its low state and is undergoing a deep fading, according to observations by Adolfo Darriba Martinez on 2015 July 4 and 5 reported via VSNET, CBA, and to the AAVSO International Database.
July 8, 2013: The VY Scl variable OR And continues in its low state, so it has been scheduled for HST/COS observations. Based on your observations, the HST/COS team will be making the final decision tomorrow morning (2013 July 9) whether to observe OR And on:
OR And 2013 July 10 11:47:01 through 15:56:12 UT
OR And is ~18V in its low state and ~14.5V in its high state.
June 24, 2013: HST/COS is scheduled to observe the SU UMa-type dwarf nova CC Scl:
CC Scl 2013 June 27 02:12:04 through 05:39:30 UT
The HST team will be making a final decision early on June 26 about observing CC Scl based substantially on your observations, so they are essential.
June 12, 2013: Among the research options in the HST/COS CV campaign underway are observing two VY Scl stars in the low state, the only time the white dwarf is observable. OR And is now in its low state, at 18th V magnitude as of 2013 June 11 UT.
