Electronic Telegram No. 2700 Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION CBAT Director: Daniel W. E. Green; Hoffman Lab 209; Harvard University; 20 Oxford St.; Cambridge, MA 02138; U.S.A. e-mail: cbatiau@eps.harvard.edu (alternate cbat@iau.org) URL http://www.cbat.eps.harvard.edu/index.html Prepared using the Tamkin Foundation Computer Network T PYXIDIS E. Waagan, AAVSO, communicates that M. Linnolt (Ocean View, HI, U.S.A.) observed an outburst of the recurrent nova T Pyx at visual magnitude 13.0 on Apr. 14.2931 UT. The outburst has been visually confirmed by several observers, as listed below. According to observations in the AAVSO International Database, the last outburst of T Pyx occurred on 1966 Dec. 10 (cf. IAUCs 1983, 1986, 1993), when it reached visual magnitude 6.5 from fainter than 15th magnitude; it was brighter than magnitude 8 for two months, fading to mag 14.3 by 1967 Oct. 8 and to blue mag 15.2 by 1969 Feb. 24. Previous outbursts occurred in 1890, 1902, 1920, and 1944. Visual magnitude estimates of T Pyx, submitted in part by the AAVSO: Mar. 28.590 UT, 15.3 (Rod Stubbings, Vic., Australia); 31.656, 15.4 (Stubbings); Apr. 1.831, [12.5 (S. Bolzoni, Busto Arsizio, Italy); 5.510, 14.5 (Stubbings); 5.967, [13.3 (A. Amorim, Florianopolis, Brazil); 6.467, 14.7 (Stubbings); 7.501, 14.8 (Stubbings); 8.505, [14.0 (A. Plummer, Linden, NSW, Australia); 10.542, 15.0 (Stubbings); 12.442, [14.0 (P. F. Williams, Heathcote, NSW, Australia); 12.465, [12.5 (H. Matsuyama, Kanimbla, Qld., Australia); 13.359, 14.5 (Linnolt); 13.494, [11.5 (Matsuyama); 14.021, [10.5 (Amorim); 14.293, 13.0 (Linnolt); 14.385, 12.2 (Plummer); 14.428, [11.5 (Matsuyama); 14.431, 12.0 (Plummer); 14.441, 11.3 (S. Kerr, Glenlee, Qld., Australia); 14.467, 11.5 (Plummer); 14.494, 11.4 (Stubbings); 14.501, 11.1 (A. Pearce, Nedlands, W. Australia); 14.508, 11.6 (Plummer); 14.540, 11.1 (Pearce); 14.552, 11.4 (Plummer); 14.583, 11.0 (Pearce); 14.592, 11.1 (Plummer); 14.627, 10.9 (Pearce); 14.665, 10.8 (Pearce). Paul Camilleri (Hurstville, Sydney, Australia) provides the following unfiltered CCD magnitudes taken with a 0.35-m reflector at the Grove Creek Observatory, Trunkey, NSW, Australia, and with a 0.15-m refractor at the Tzec Maun Observatory, Moorook, South Australia: Apr. 3.480, 15.2; 10.430, 14.6; 14.4029, 11.9. Camilleri provides the following position for T Pyx measured from three images: R.A. = 9h04m41s.52 +/- 0s.01, Decl. = -32d22'47".5 +/- 0".2 (equinox 2000.0). Waagen reports the following selected V magnitudes from P. Nelson (Ellinbank, Vic., Australia): Apr. 14.4973, 11.541 +/- 0.006; 14.5182, 11.482 +/- 0.006; 14.5338, 11.454 +/- 0.005; 14.5363, 11.439 +/- 0.005; 14.5402, 11.446 +/- 0.005; 14.5409, 11.422 +/- 0.005; 14.5492, 11.402 +/- 0.005; 14.5499, 11.384 +/- 0.005; 14.5524, 11.343 +/- 0.005; 14.5530, 11.358 +/- 0.005; 14.5575, 11.314 +/- 0.005; 14.5601, 11.298 +/- 0.005; 14.5607, 11.278 +/- 0.005; 14.5639, 11.258 +/- 0.005; 14.5671, 11.237 +/- 0.005; 14.5690, 11.213 +/- 0.005; 14.5737, 11.205 +/- 0.005; 14.5757, 11.187 +/- 0.006; 14.5764, 11.145 +/- 0.005; 14.5796, 11.137 +/- 0.007; 14.5802, 11.118 +/- 0.005; 14.5834, 11.099 +/- 0.005; 14.5860, 11.052 +/- 0.006; 14.5905, 11.030 +/- 0.005; 14.5918, 11.016 +/- 0.005; 14.5925, 10.992 +/- 0.005; 14.5990, 10.944 +/- 0.005. NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2011 CBAT 2011 April 15 (CBET 2700) Daniel W. E. Green