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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

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.)

http://www.aavso.org/ejaavso141

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

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.

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