News and Announcements
|31 March||Alert Notice 515: SN 2015F in NGC 2442 (PSN J07361576-6930230)||
March 31, 2015
Event: Supernova in NGC 2442: SN 2015F = PSN J07361576-6930230
Discovered by: Libert A. G. Monard, Calitzdorp, Western Cape, South Africa
Discovery magnitude: 16.8 unfiltered CCD using a 35-cm RCX400 telescope (+SBIG ST8-XME camera)
Discovery date: 2015 March 9.789 UT
|27 March||Charts and Sequences Update March 2015||
The following objects have new or revised sequences. If you observe any of these objects you should update your charts as soon as possible. You can download the entire list in .xlsx or .csv format below. Our sincere thanks to Tom Bretl and the charts and sequences team for their continued hard work.
|24 March||Alert Notice 514: RW Aur monitoring requested||
March 24, 2015: Dr. Hans Moritz Guenther (Massachusetts Institute of Technology) has requested AAVSO observers' assistance with the classical T Tauri star RW Aur (component A). He writes:
|18 March||Alert Notice 513: Request for observations of GW Lib in support of HST observations||
March 18, 2015: Dr. Paula Szkody, University of Washington, has requested our help in monitoring the cataclysmic variable GW Lib for upcoming Hubble Space Telescope observations, scheduled to be made during the window 2015 April 22-25 UT. Dr. Szkody also observed this object with HST in March 2011 and March 2010 (see AAVSO Alert Notices 433 and 417, respectively).
|16 March||Alert Notice 512: Nova Sagittarii 2015 No. 2 = PNV J18365700-2855420||
March 16, 2015
Event: Nova Sagittarii 2015 No. 2 = PNV J18365700-2855420
Discovered by: John Seach, Chatsworth Island, NSW, Australia
Discovery magnitude: 6.0 using DSLR and 50mm f/1.0 lens
Discovery date: 2015 March 15.634 UT
Coordinates: R.A. 18 36 56.84 Dec. -28 55 39.8 (2000.0)
|13 March||Special Notice #400: BF Cyg observations requested||
March 13, 2015: Dr. George Wallerstein (University of Washington) informed us that the symbiotic variable BF Cygni has brightened considerably over the past few weeks, and he is currently obtaining spectroscopy of it.
|13 March||Alert Notice 511: Monitoring requested for developing planetary systems dust production study||
March 13, 2015: Dr. George Rieke (University of Arizona) and colleagues have requested AAVSO assistance in monitoring four stars with developing planetary systems. The targets are RZ Psc, HD 15407A, V488 Per, and HD 23514. This campaign is similar to the one conducted in 2013 (see AAVSO Alert Notice 482).
|13 March||104th Spring Meeting of the AAVSO||
AAVSO 49 Bay State Rd. Cambridge, MA 02138 firstname.lastname@example.org 617-354-0484