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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.
Alerta de AAVSO 436
Erupción de la nova recurrente T Pyxidis
14 de abril de 2011
La nova recurrente T Pyxidis ha sido descubierta en erupción. Fue detectada por M. Linnolt (Hawaii, Estados Unidos) con magnitud visual 13.0 en abril 14.2931, 2011 (JD 2455665.7931), y confirmada por A. Plummer (m(vis)=12.2, JD 2455665.8847) y S. Kerr (m(vis)=11.3, JD 2455665.9410). Esta es la primer erupción de T Pyx desde el 7 de diciembre de 1966, hace casi 45 años. Se solicitan urgentemente observaciones de esta rara variable eruptiva, comenzando inmediatamente.
AAVSO Alert Notice 436
Outburst of the recurrent nova T Pyx
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.)
Alert Notice 435: V5588 Sgr = Nova Sagittarii 2011 No. 2 = PNV J18102135-2305306 [V5588 Sgr]
Apri1 3, 2011
Event: V5588 SGR = NOVA SAGITTARII 2011 No. 2 = PNV J18102135-2305306 [V5588 Sgr]
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)
Special Notice #238: HST observations scheduled for GW Lib
April 2, 2011: Further to AAVSO Alert Notice 433, Dr. Paula Szkody, University of Washington, informs us that the time of the HST observations of GW Lib has been set for Friday night, 2011 April 8/9. The ground observations to confirm that the object is not in outburst - and allow the HST observations to take place - will thus need to take place on Thursday, April 7/8.
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.
Thank you,
The AAVSO Charts and Sequences Team
Name |
Constellation |
Change |
LX |
And |
deleted 2 duplicates |
KR |
Alert Notice 434: Outburst of NSV 1436
March 30, 2011: The cataclysmic variable NSV 1436 has been discovered in outburst. This is the first bright outburst of this star observed since 1948, and followup observations are strongly encouraged. Little is known about the nature of NSV 1436, and observations may help shed light on whether the star is an infrequently outbursting normal dwarf nova, a WZ Sge star, or recurrent nova.
Special Notice #237: Nova Sagittarii 2011 No. 2 = PNV J18102135-2305306 [V5588 Sgr]
March 28, 2011: We have been informed by the Central Bureau for Astronomical Telegrams (Central Bureau Electronic Telegram 2679, Daniel W. E. Green, ed.) that Koichi Nishiyama, Kurume, Japan, and Fujio Kabashima, Miyaki, Japan, report their discovery of a possible nova [V5588 Sgr] at magnitude 11.7 on two unfiltered CCD frames taken around March 27.832 UT. They confirmed the object on images taken on March 27.832 UT.