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LBV

Alert Notice 301: Observations requested for 1041-59 eta Car and 2349+56 rho Cas

THE AMERICAN ASSOCIATION OF VARIABLE STAR OBSERVERS
25 Birch Street, Cambridge, MA 02138 USA
INTERNET: aavso@aavso.org
Tel. 617-354-0484 Fax 617-354-0665

AAVSO ALERT NOTICE 301 (May 21, 2003)

SUBJECTS: 1041-59 ETA CAR; 2349+56 RHO CAS

OBSERVATIONS REQUESTED: 1041-59 ETA CAR and 2349+56 RHO CAS

EVENTS: Possible optical brightening of eta Car over next few months; Possible optical fading of rho Cas over next few months

2003 eta Carinae Observing

 

Eta Car ImageEta Carinae is one of the most interesting stars in the sky. According to predictions, 2003 could be a very exciting year for observing Eta Car. Below is a list of resources and information that can help you with your observations.

Alert Notice 472: Monitoring of HD 5980 requested for multiwavelength campaign

October 19, 2012:  Dr. Noel Richardson (Universite de Montreal, formerly at Georgia State University) has requested monitoring of the Small Magellanic Cloud eclipsing binary HD 5980 (in Tucana) as part of a multiwavelength campaign he is coordinating to study this unusual system. Dr. Richardson writes:

Special Notice #293: S Dor campaign continued through 2012-2013 season

September 10, 2012:  Dr. Noel Richardson (Georgia State University) has requested that the observing campaign on the luminous blue variable prototype S Dor (AAVSO Alert Notice 453, AAVSO Special Notice #280) be continued through the 2012-2013 observing season.

Special Notice #291: Brightening of LBV HDE 269006 = R71

July 26, 2012: The luminous blue variable (LBV) HDE 269006 = R71 in the Large Magellanic Cloud is brightening and is currently at V magnitude 8.3.

Observations in the AAVSO International Database going back to 1987 show HDE 269006 at visual magnitude ~10.8 until 2006, when it began to brighten, reaching magnitude ~8.5 in late 2009. It then declined to ~magnitude 9 by late 2012, where it has been since then.

Special Notice #280: HST UV spectroscopy observations of S Dor scheduled

May 9, 2012: We have been informed by Dr. Noel Richardson, Georgia State University, that the UV spectroscopy observations of S Dor to be made with the Hubble Space Telescope have been scheduled for

2012 MAY 11 from 21:21:55 UT to 23:55:04 UT.

During the 24 hours prior to and following the HST observations, as well as during them, please increase your visual/BVRI (or as many of these filters as you can) coverage from once per night to twice per night. Afterwards, please return to nightly observations until further notice.

Alert Notice 453: Monitoring of S Dor requested for multiwavelength campaign

February 23, 2012:  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:

1. UV Spectroscopy from HST
2. Optical spectroscopy from CTIO and an amateur in Australia
3. Near-IR Spectroscopy from SOAR (pending approval)
4. Mid-IR photometry from Gemini (pending approval)

AAVSO 49 Bay State Rd. Cambridge, MA 02138 aavso@aavso.org 617-354-0484