AAVSO Alert Notice 488Dr. Hans Moritz Guenther (Harvard-Smithsonian Center for Astrophysics) has requested nightly observations of the classical T Tauri star AA Tau in order to schedule x-ray observations with XMM-Newton that have been planned for between 2013 August 15 and September 15.
The purpose of the AAVSO … Read the rest of this article
AAVSO Alert Notice 486Dr. Noel Richardson (Universite de Montreal) is helping coordinate a very large ProAm campaign (over 20 professional and amateur astronomers) this summer on three bright Wolf Rayet stars in Cygnus. Dr. Richardson, co-PIs Drs. Tony Moffat (Universite de Montreal), Nicole St.-Louis (Universite de … Read the rest of this article
AAVSO Alert Notice 485Dr. Andrea Dupree (Harvard-Smithsonian Center for Astrophysics), has requested AAVSO monitoring of the symbiotic variable AG Draconis from now through at least September 2013 for correlation with upcoming Chandra x-ray and HST ultraviolet observations.
Dr. Dupree writes that as a symbiotic variable, AG Dra “exhibits both … Read the rest of this article
AAVSO Alert Notice 484Event: Nova Sco 2013 = PNV J17335943-3606216
Discovered by: Koichi Nishiyama (Kurume, Japan) and Fujio Kabashima
(Miyaki, Japan)
Discovery Magnitude: unfiltered CCD magnitude 11.1, from two 40-s unfiltered CCD frames, using a 105-mm f/4 camera lens (+SBIG STL6303E camera).
Discovery date: 2013 June 03.6146 UT
Coordinates: R.A. … Read the rest of this article
AAVSO Alert Notice 482Huan Meng and Dr. George Rieke (University of Arizona) have requested AAVSO assistance in monitoring three bright stars with developing planetary systems. The stars have been observed with NASA’s Spitzer Space Telescope to have varying levels of dust in the circumstellar disk. These … Read the rest of this article
AAVSO Alert Notice 481The AAVSO solicits participation in an online survey from their member and observer communities. The survey is being conducted in advance of an upcoming long-term observing campaign that will be launched in mid-April 2013. They are seeking participation in this survey from as broad a sample of the AAVSO … Read the rest of this article
AAVSO Alert Notice 480MR UMa superoutburst coverage requested for HST observations
March 8, 2013
Dr. Boris Gaensicke (Warwick University) has requested observations of the currently-outbursting SU UMa-type cataclysmic variable MR UMa in preparation for and support of HST observations scheduled for the week 2013 April 4-7.
Dr. Gaensicke … Read the rest of this article
January 9, 2013
Event: Supernova 2013E in IC 2532 = PSN J10000552-3414013
Discovered by: Stuart Parker (Canterbury, New Zealand)
Discovery Date: 2013 Jan. 4.58 UT
Discovery Magnitude: red mag 14.8 on a 30-s unfiltered CCD image taken with a 30-cm Astro-Tech AT12RC Ritchey-Chretien astrograph (+ ST10 camera) at his Parkdale Observatory in the course of the Backyard Observatory Supernova Search … Read the rest of this article
AAVSO Alert Notice 476Dr. Bob Zavala (U.S. Naval Observatory, Flagstaff) has requested AAVSO assistance in obtaining multicolor photometry of the bright triple system b Per in order to prepare for and detect a possible eclipse of the AB components by the C component predicted for 2013 January 23. … Read the rest of this article
As announced by Dr. Matthew Templeton (AAVSO) in AAVSO Special Notice #316 (www.aavso.org/aavso-special-notice-316), Dr. Michael Shara (American Museum of Natural History, Columbia University) has requested dense coverage of the dwarf nova U Gem in support of HST Cosmic Origins … Read the rest of this article
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