News and Announcements
|28 April||AAVSO Alert Notice 438||
SUPERNOVA 2011by in NGC 3972 = PSN J11554556+5519338
|27 April||New ejaavso preprint "Leo5 is a Z Cam Type Dwarf Nova" by P. Wils, T. Krajci, and M. Simonsen||
ej 142: "Leo5 is a Z Cam Type Dwarf Nova" (P. Wils, T. Krajci, M. Simonsen)
|20 April||Visual Observing Manual updates||
The Manual for Visual Observing of Variable Stars has been updated to reflect changes to the VSP and WebObs that happened when the new website was launched last summer. This mostly affects Chapters 2 and 7. To download these and other chapters, or the entire Manual, please click on the link below:
You will also find versions of the Manual translated into seven other languages on this page.
Stay tuned for the Portuguese verson, due to be completed soon!
|15 April||AAVSO Newsletter 48 now online|
|15 April||AAVSO Alert Notice 437||
Campaign to monitor the recurrent nova T Pyx throughout 2011 eruption
April 15, 2011: Further to 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.
|14 April||Alerta de AAVSO 436||
Erupción de la nova recurrente T Pyxidis
|14 April||AAVSO Alert Notice 436||
Outburst of the recurrent nova T Pyx
|06 April||New ejaavso preprint: "Times of Minima and New Ephemerides..." by A. Marchini et al.||
ej 141: "Times of Minima for Several Eclipsing Binaries and New Ephemerides for V569 Lyrae, V571 Lyrae, and V572 Lyrae" (A. Marchini et al.)
|03 April||Alert Notice 435: V5588 Sgr = Nova Sagittarii 2011 No. 2 = PNV J18102135-2305306||
Apri1 3, 2011
Event: V5588 SGR = NOVA SAGITTARII 2011 No. 2 = PNV J18102135-2305306
Discovered by: Koichi Nishiyama, Kurume, Japan, and Fujio Kabashima, Miyaki, Japan
Discovery Date: ~ 2011 March 27.832 UT
Discovery Magnitude: unfiltered CCD magnitude mag 11.7 on two 40-s unfiltered CCD frames using a 105-mm f/4 camera lens (+ SBIG STL6303E camera)
Position: R.A. = 18:10:21.35, Decl. = -23:05:30.6 (equinox 2000.0)
|02 April||AAVSO Special Notice #238||
HST observations scheduled for GW Lib
|01 April||Charts and Sequences Update April 2011||
April 1, 2011
The following variable stars have either new or revised sequences and charts. If you observe any of these stars you should update your charts to the most recent version.