Computer Science – Databases
Scientific paper
Feb 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aan...453....1w&link_type=abstract
AAVSO Alert Notice 453
Computer Science
Databases
Astronomical Databases: Miscellaneous, Stars: Variables: General, Stars: Individual (S Dor), Stars: Atmospheres
Scientific paper
Dr. Noel Richardson, Georgia State University, has requested monitoring of the luminous blue variable (LBV) prototype S Doradus as part of a multiwavelength campaign he is coordinating to study the photosphere of this star. At present the observations planned include: UV Spectroscopy from HST, Optical spectroscopy from CTIO and an amateur in Australia, Near-IR Spectroscopy from SOAR (pending approval), Mid-IR photometry from Gemini (pending approval). While these observations will likely take place in May 2012, optical monitoring beginning now is important. S Dor is particularly interesting at present because its current state allows the deepest look into its photosphere since the 1960s, leading to a better understanding of its stellar and wind properties. To quote Dr. Richardson, "...the types of variability we are really wanting to probe are the long term trends and the decline to optical minimum it is going through." Visual and photometric observations are requested on a nightly basis. BVRI photometry would be ideal, but any filter(s) would be very helpful. According to observations in the AAVSO International Database, S Dor is currently at visual magnitude ~10.4. Its decline from visual magnitude 9.2 began in 2006, with a more rapid decline starting in early 2010. Coordinates: RA = 05 18 14.35 Dec = -69 15 01.1 (2000.0). Finder charts may be created and data from the AAVSO International Database may be viewed, plotted, or downloaded (www.aavso.org).
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