AAVSO Alert Notice 517Dr. Axel Schwope (Leibniz Institute for Astrophysics Potsdam, Germany) has requested AAVSO observers’ assistance in monitoring the magnetic variable AM Her in support of upcoming XMM-Newton plus NuSTAR (Nuclear Spectroscopic Telescope Array) observations.
The XMM-Newton observations are scheduled for 2015 April 06 02:37:02-15:07:02 … Read the rest of this article
AAVSO Alert Notice 505Ms. Deanne Coppejans (PhD candidate, Radboud University Nijmegen (Netherlands) and University of Cape Town) and colleagues have requested AAVSO observer assistance in monitoring several dwarf novae in support of their campaign to observe them in outburst with the Very Large Array (VLA) to search … Read the rest of this article
AAVSO Alert Notice 4971. Event: Nova Sagittarii 2014 = PNV J18250860-2236024
Discovered by: Sigeru Furuyama (Tone-machi, Ibaraki-ken, Japan) and reported by S. Nakano (Sumoto, Japan)
Discovery magnitude: unfiltered CCD magnitude 8.7, using a 200-mm f/2.8 camera lens + BJ-42L camera
Discovery date: 2014 Jan. 26.857 UT
Coordinates: R.A. 18 25 … 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 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
Further to AAVSO Alert Notice 436 (http://www.aavso.org/aavso-alert-notice-436), a fast photometry observing campaign has been initiated by Dr. Bradley Schaefer (Louisiana State University) to monitor the recurrent nova T Pyxidis throughout its current eruption.
Brief summary of eruption: The recurrent nova T Pyx was discovered in … Read the rest of this article
The recurrent nova T Pyxidis has been discovered in outburst. It was detected by M. Linnolt (Hawaii, United States) at a visual magnitude of 13.0 on 2011 April 14.2931 (JD 2455665.7931), and confirmed by A. Plummer (m(vis)=12.2, JD 2455665.8847) and S. Kerr … 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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