SIMBAD references

Additional CCD magnitudes for 2011gc (unfiltered unless otherwise noted): 2006 Aug. 2.572, [21.0 (K. Itagaki, Teppo-cho, Yamagata, Japan; communicated by S. Nakano, Sumoto); 2011 June 28.81, 17.6 (Ciabattari et al.; limiting magnitude 19.5); 29.268, 17.3 (Joseph Brimacombe, Cairns, Australia; position end figures 19s.18, 14".7); July 2.044, 17.4 (Xavier Bros, Ager, Catalonia, Spain, 35-cm f/4.6 telescope + ST8-XME camera; position end figures 19s.20, 14".0; UCAC-2 reference stars); 11.993, R = 17.7 (Federica Luppi, Varese, Italy; 0.36-m f/7.9 reflector + Bessell R filter; position end figures 19s.17, 14".3; reference stars from CMC-14 catalogue); 20.889, 17.7 (S. Leonini, Siena, Italy, 0.53-m f/8.7 Ritchey-Chretien telescope + Apogee Alta U47 camera); Aug. 4.577, 17.9 (Itagaki; 0.60-m f/5.7 reflector + BITRAN BT-21 camera; position end figures 19s.13, 13".9; communicated by Nakano); 4.871, 17.6 (S. Foglia and G. Galli, Pogliano Milanese, Italy; 0.28-m f/6.8 Schmidt- Cassegrain reflector + ST8XME camera; position end figures 19s.15, 14".3; UCAC-2 reference stars); 6.620, 17.7 (Itagaki; limiting magnitude 20.0; position end figures 19s.13, 13".6; offset 3".6 east, 9".9 north; independent discovery; communicated by Nakano); 8.19, 17.8 (R. A. Koff, Bennett, CO, USA; Meade 0.25-m f/10 Schmidt-Cassegrain reflector + Apogee AP-47p CCD camera; image scale 1"/pixel; position end figures 19s.14, 13".7; UCAC3 reference stars; brightness uncertain by 0.5 mag due to background glow from presumed host galaxy); 10.845, 17.6 (V. Gerke and S. Korotkiy, Ka-Dar Observatory, TAU Station, Nizhny Arkhyz, Russia; 40-cm telescope + STL-11000M camera; position end figures 19s.16, 14".1). Brimacombe's June 29 image is posted at the following website URL: http://www.flickr.com/photos/43846774@N02/5885982777/. Luppi's image from July 11 is posted at http://www.astrogeo.va.it/pub/TOCP/PSN_U1651633.jpg. Itagaki's image from Aug. 6 is at URL http://www.k-itagaki.jp/images/6577.jpg.