AAVSO Alert Notice 462Dr. Eric Mamajek (Cerro Tololo Interamerican Observatory and University of Rochester) has requested AAVSO observers’ assistance in monitoring the young star 1SWASP J140747.93-394542.6 to help determine the eclipse behavior related to a transiting ringed substellar companion.
This observing campaign begins now and continues until … Read the rest of this article
AAVSO Alert Notice 460The AAVSO have been asked to help disseminate the news of a possible occultation of Pluto visible to observers on the US East coast. Although the AAVSO does not ordinarily issue announcements of upcoming occultations, in this case the object is Pluto and the NASA … Read the rest of this article
AAVSO Alert Notice 459Dr. Koji Mukai (Universities Space Research Association/NASA Goddard Space Flight Center) has requested AAVSO observers’ assistance in monitoring the SS Cyg-type dwarf nova RU Peg in support of target-of-opportunity observations with the NASA Swift satellite during an outburst.
His observations will be targeted during the … Read the rest of this article
AAVSO Alert Notice 458Dr. Christopher Mauche, Lawrence Livermore National Laboratory, and colleagues in Spain and Oman have requested AAVSO observations in support of their upcoming multiwavelength observations of the novalike intermediate polar cataclysmic variable AE Aqr with the Swift satellite, the MAGIC (Major Atmospheric Gamma Imaging Cherenkov) telescope on La … Read the rest of this article
AAVSO Alert Notice 457Dr. Michael Rupen (National Radio Astronomy Observatory, Socorro, NM) has informed us that he and his colleagues of the EVLA (Expanded Very Large Array) Nova Team are carrying out a multiwavelength campaign on the Fe II-type nova Nova Oph 2012. They have triggered observations with Swift, … Read the rest of this article
AAVSO Alert Notice 456Dr. Bram Ochsendorf (Leiden Observatory, Belgium) has requested monitoring by AAVSO observers of the R CrB variable V854 Cen in support of observations to be made using the XSHOOTER instrument on the Very Large Telescope (VLT) of the European Southern Observatory’s La Silla Paranal Observatory in Chile. Dr. … Read the rest of this article
AAVSO Alert Notice 454Dr. Margarita Karovska, Harvard-Smithsonian Center for Astrophysics, has requested visual and photometric observations of the symbiotic variable CH Cyg in preparation for and support of Chandra and HST observations scheduled for later in March 2012. Dr. Karovska’s observations will be a followup investigation … Read the rest of this article
AAVSO Alert Notice 453Dr. 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… Read the rest of this article
AAVSO Alert Notice 452Dr. Hans Moritz Guenther, Harvard-Smithsonian Center for Astrophysics, has requested bracketing and simultaneous observations in support of XMM-Newton x-ray observations of the classical T Tauri star SU Aur and the close-by Herbig Ae star AB Aur scheduled for February 15 – 17, … Read the rest of this article
AAVSO Alert Notice 450Dr. Paula Szkody (University of Washington) has requested the help of AAVSO observers in monitoring the WZ Sge-type cataclysmic variable SDSS J080434.20+510349.2 (SDSS0804+51) in support of Hubble Space Telescope ultraviolet spectroscopic observations scheduled for 20:52:40-23:32:35 2011 November 3 UT (the night of … Read the rest of this article
The Sun Now (Visible light)
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The Sun Now (H-Alpha light)
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Aurora Oval
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Aurora Oval
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