Alert Notice 645: Monitoring of LPVs for Maser Study
Note: This campaign has been extended to October 2020 and the list of targets has been revised. Please see AAVSO Alert Notice 687 for details. - Elizabeth O. Waagen, December 4, 2019
July 31, 2018: Michael Stroh (Ph.D. candidate, University of New Mexico) requests AAVSO assistance in monitoring 19 LPVs in support of a VLA campaign studying SiO masers. AAVSO monitoring begins now and goes through October 2019.
LPV of the Month July, 2018
A Carbon Star
This month's Long Period Variable (LPV), SS Vir, should be a treat for visual observers. SS Vir is a bright but very dark red Carbon Star. It’s B-V index is 4.20, making it one of the reddest object around.
AAVSO Bulletin 81 for 2018 published
AAVSO Bulletin 81: Predicted Dates of Maxima and Minima of Long Period Variables for 2018 has been published. This annual publication covers the period January 2018 - February 2019 and gives predicted extrema dates for 381 Long Period Variables in the AAVSO's Legacy LPV program.
AAVSO Bulletin 81 for 2018 - Stars with Double Maxima
In AAVSO Bulletin 81 there are two stars that exhibit double maxima: R Cen and R Nor. These stars therefore have primary and secondary maxima and minima. They are not included in the main Bulletin table.
AAVSO Bulletin 81 for 2018 - How to Use the Bulletin
AAVSO Bulletin 81 - Predicted Dates of Maxima and Minima of Long Period Variables for 2018 - is published in the format that was introduced in 2011.
AAVSO Bulletin 81 for 2018 - Introduction
AAVSO Bulletin 81: Predicted Dates of Maxima and Minima of
381 Long Period Variables for 2018
AAVSO Bulletin 81 for 2018 - Letter to Observers
AAVSO Bulletin 81 for 2018
Predicted Dates of Maxima and Minima of 381 Long Period Variables for 2018
Variable Stars and the Stories they Tell
What are variable stars and why are astronomers interested in them?