The observers of the AAVSO are asked to participate in a long-term photometric monitoring campaign on a number of magnetically active dwarf stars, requested by Dr. Styliani (Stella) Kafka of the Department of Terrestrial Magnetism, Carnegie Institute of Washington. She requests long-term monitoring of … Read the rest of this article
Dr. Brian Espey (Trinity College, Dublin, Ireland) has requested Read the rest of this article
photoelectric photometry and bright star CCD photometry of the semiregular variable NSV 99 (= khi Peg) beginning immediately. These observations are in support of ultraviolet spectroscopy to be obtained with the …
Event: Type-Ia Supernova 2009ig in NGC 1015 has brightened
Discovered By: I. Kleiser, S. B. Cenko, W. Li, and A. V. Filippenko, University of California (LOSS discovery on unfiltered KAIT images)
Discovery Date: Aug. 20.48 UT
Discovery magnitude: Read the rest of this article
– 17.5 on KAIT images on Aug. 20
– brightened as …
AAVSO Alert Notice 402:Discovered By: K. Itagaki (Teppo-Cho, Yamagata, Japan)
Discovery Date: 2009 August 16.515
Position: RA = 17h 38m 19.72s , Dec = -26d 44m 13.7s (+/- 0.6 arcsec from L. Elenin, Moscow, Russia, using the Tzec Maun 0.31-m Newtonian near Mayhill, NM)
Charts: Finder charts for this object may be plotted … Read the rest of this article
Kunegunda Belle, Don Hoard and Steve Howell are observing two cataclysmic variables with Spitzer during the next couple of weeks. They request ground-based light curves spanning the observation intervals so that they can identify the state each variable is in during the Spitzer visits.
1. EX … Read the rest of this article
Discovered Independently By:
a. – Koichi Nishiyama, Kurume, Fukuoka-ken, Japan, and Fujio Kabashima, Miyaki-cho, Saga-ken, Japan
b. – Grzegorz Pojmanski, Dorota Szczygiel, and Bogumil Pilecki, Warsaw University Astronomical Observatory, observed by ASAS3
Discovery Date: Read the rest of this article
a. – Aug. 6.494 and 6.495 UT, confirmed on five frames taken around Aug. …
AAVSO Alert Notice 399:Edward Smith (STScI) has requested nightly photometric monitoring of the symbiotic star AG Draconis during the period 2009 August 2, and tentatively scheduled to continue through mid-September 2009. They are specifically requesting nightly B and V-band monitoring, with B-band observations strongly encouraged; … Read the rest of this article
The bright, long-period, eclipsing binary star epsilon Aurigae is predicted to begin its next eclipse late July or early August of 2009. The AAVSO is participating in a global campaign to record this eclipse as part of the International Year of Astronomy 2009 celebrations, organized by the Citizen Sky … Read the rest of this article
Dr. Jerome Orosz (SDSU) has requested the assistance of southern bright star observers in observing the high-mass X-ray binary star V884 Sco (== 4U 1700-377). Orosz and collaborators are attempting to measure the mass of the compact object to clarify … Read the rest of this article
Discovered By: G. Pojmanski, D. Szczygiel, and B. Pilecki (Warsaw University Astronomical Observatory)
Discovery Date: 2009 May 08.235
Discovery Magnitude: m=8.235 (ASAS V)
Position: RA = 13h 31m 15.76s , Dec = -63d 57m 38.5s (from L. Elenin, Moscow, Russia, using the Tzec Maun-Pingelly 0.15-m refractor near Perth, Australia)
Charts:… 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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