AAVSO Alert Notice 474An international team of astronomers, including Drs. Tony Moffat (University of Montreal), Michael Corcoran (NASA GSFC), and Noel Richardson (University of Montreal), has requested AAVSO photometry and spectroscopy of delta Ori (Mintaka) in support of their multiwavelength campaign on this hot binary star in Orion’s Belt. Satellite … Read the rest of this article
AAVSO Alert Notice 473Darryl Sergison (University of Exeter) has requested AAVSO assistance with a campaign he is organizing on six T Tauri stars. He writes: “In Autumn 2013 I [and my PhD supervisor Tim Naylor of Exeter University are] undertaking a new study into the nature of pre-main-sequence low mass stars, … Read the rest of this article
AAVSO Alert Notice 472: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:
“HD 5980 is … Read the rest of this article
AAVSO Alert Notice 470:The symbiotic variable V4018 Sgr is undergoing an outburst, according to observations reported to the AAVSO and confirmed by spectroscopy by Ulisse Munari et al. Prompted by an observation and comment from John Bortle (Stormville, NY) (16 June 2012, visual magnitude 12.2) about a possible outburst, Steven … Read the rest of this article
AAVSO Alert Notice 469:Dr. Nikolaus Vogt (Universidad de Valparaiso, Chile) has requested photometry and spectroscopy of the novalike (VY Scl subtype) cataclysmic variable TT Ari in support of upcoming observations with the Canadian Microvariability and Oscillations of Stars (MOST) satellite.
The observations are being carried out … Read the rest of this article
AAVSO Alert Notice 467Discovered by: Shigehisa Fujikawa (Kanonji City, Kagawa Prefecture, Japan, reported by Mitsuru Soma, National Astronomical Observatory of Japan).
Discovery Magnitude: magnitude 9.4 C using a 105mm camera lens+CCD
Discovery date: 2012 Aug. 09.8048 UT
Coordinates: 06 39 38.74 +05 53 52.0 (2000.0)
Spectra: Spectra by Stephane Charbonnel … Read the rest of this article
AAVSO Alert Notice 466On behalf of a large Hubble Space Telescope consortium of which they are members, Dr. Joseph Patterson (Columbia University, Center for Backyard Astrophysics) (in cba:chat) and Dr. Arne Henden (AAVSO) have requested observations from the amateur astronomer community in support of upcoming HST … Read the rest of this article
AAVSO Alert Notice 465Discovered by: Tadashi Kojima (Tsumagoi, Agatsuma-gun, Gunma-ken, Japan) (reported by S. Nakano (Sumoto, Japan)
Discovery Magnitude: mag 12.6 on two frames using a Canon EOS 40D camera (+ 150-mm f/2.8 lens)
Discovery date: 2012 July 16.512 UT
Coordinates: R.A. 18 19 37.0 Decl. -19 07 … Read the rest of this article
AAVSO Alert Notice 464Scotty Degenhardt (Santa Fe, NM), a pioneer in the use of video for timing eclipses of solar system and stellar objects and aresearch member of the International Occultation Timing Association (IOTA), has informed the AAVSO of a research project he and colleagues are working on: modeling … Read the rest of this article
AAVSO Alert Notice 463Discovered independently by:
– Koichi Itagaki (Yamagata, Japan, reported by Hitoshi Yamaoka, Kyushu University)
– Yukio Sakurai (Mito, Ibaraki-ken, Japan)
Discovery Magnitude: Read the rest of this article
– Itagaki: magnitude 10.3 on an unfiltered CCD image taken with a 0.21-m reflector
– Sakurai: magnitude 9.9 on four 20-s frames taken …
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