August 3, 2016: Dr. Noel Richardson (University of Toledo) and colleagues have requested AAVSO assistance in optical monitoring of the bright, colliding-winds binary V1687 Cyg (WR 140, HD 193793) as part of their multi-wavelength campaign on this system.
April 5, 2016: Further to AAVSO Alert Notice 536, close monitoring of the cataclysmic variable SS Cyg is urgently requested. Immediate notification of the beginning of the anticipated outburst is crucial and is requested.
The success of the multiwavelength (radio and optical) observing campaign on SS Cyg underway depends on immediate reporting of outburst behavior to trigger multi-site radio observations.
December 15, 2015: Further to AAVSO Alert Notice 503 and AAVSO Special Notice #409, Dr. Margarita Karovska (Harvard-Smithsonian Center for Astrophysics) urgently requests that multicolor and visual AAVSO observations of the symbiotic variable RT Cru continue.
Correction: In the text below, the date of the detection by the Swift satellite was incorrectly given as 2015 June 16.77197 UT. The correct date is 2015 June 15.77197 UT.
February 22, 2006: The optical afterglow and underlying supernova for GRB060218 continues to brighten and has generated a lot of interest in the scientific community. It is well positioned in the early evening sky for professional and amateur monitoring. The latest coordinates are:
March 9, 2010: The old nova (1901) and x-ray source GK Per may be going into outburst. Reports beginning late on 2010 March 6 UT show it brightening from its minimum visual magnitude of about 13.1 to 12.3-12.4.
This nova, discovered at 9th magnitude 12 days ago, has brightened dramatically in the past few days to 3rd magnitude, becoming one of the brightest novae in the past several years. It has gained the attention of the professional community and will be observed by numerous satellites, including Chandra, Swift, and INTEGRAL.
January 21, 2013: AAVSO observations are requested of the SW Sex-type novalike variable BB Dor in support of one and possibly two sets of multiwavelength observations: Dr. Tomohito Ohshima (Department of Astronomy, Kyoto University) and colleagues have triggered Target of Opportunity observations with NASA's Swift gamma-ray burst satellite, and Dr. Boris Gaensicke (Warwick University) is hoping to observe BB Dor in the ultraviolet with HST.
