March 5, 2018: Bob Jacobs (Ph.D. candidate, Radboud University) and Drs. Samaya Nissanke (Radboud University), Jennifer Barnes (Columbia University), and Deanne Coppejans (Northwestern University) have requested AAVSO observers' assistance in monitoring the cataclysmic variables YZ Cnc, SU UMa, and CR Boo. The goal is to build good multicolor light curves of two outbursts of CR Boo and two superoutbursts each of YZ Cnc and SU UMa.
V Boo is an interesting semiregular star that has been observed by AAVSO observers and members since 1904 (a single observation is recorded in 1893). Over 75,000 observations are in the AID from over 2,000 different observers as can be seen in the light curve shown below which displays all observations in the AID. It is one of the Legacy LPV Program stars.
Thanks to the excellent work of our own Sebastián Otero, we now have a Spanish translation of the AAVSO Solar Observing Guide available for download free-of-charge. In addition to Spanish, this Guide is also available in French and German (and soon Italian).
If you would like to translate the AAVSO Solar Observing Guide or any of the other AAVSO observing manuals or guides into your own native language, please contact AAVSO staff member Sara Beck.
Event: Probable Nova in M31: ASASSN-18ca = PNV J00423439+4044255
Discovered independently by:
- Koichi Itagaki (Yamagata, Japan; reported via CBAT TOCP)
- All Sky Automated Survey for SuperNovae (ASAS-SN) (reported by J. Brimacombe et al. in ATel #11275)
February 12, 2018: Dr. Koji Mukai (NASA Goddard Space Flight Center) and colleagues have requested AAVSO observations of the WZ Sge type dwarf nova GW Lib in support of observations with the ESA XMM-Newton spaceobservatory scheduled for
