SIMBAD references

Additional CCD magnitudes for 2011gu (unfiltered unless otherwised noted): 1989 July 14, [21 (Digitized Sky Survey red plate; via Vitali Nevski, Vitebsk, Belarus); 2011 Oct. 1, [19.5 (ISSP); 15.888, 17.4 (S. Leonini and L. M. Tinjaca Ramirez, Siena, Italy; 0.53-m f/8.7 reflector + U47 camera at Montarrenti Observatory); 15.9, 17.0 (A. Dimai, 0.28-m telescope, Col Drusci Observatory); 15.920, R = 17.5 (Federica Luppi, Luca Ghirotto, and Mirko Maffiolini, Varese, Italy; 0.36-m f/7.9 reflector + Bessell R filter; position end figures 02s.81, 36".0; CMC-14 catalogue for reference stars; image posted at website URL http://www.astrogeo.va.it/pub/TOCP/PSN_N7485.jpg); 16.117, 17.8 (Joseph Brimacombe, Cairns, Australia; position end figures 02s.79, 36".7; image posted at URL http://www.flickr.com/photos/43846774@N02/6250906523/); 16.913, 17.4 (C. Jacques and E. Pimentel, Belo Horizonte, Brazil; remotely using the GRAS 07 telescope at Nerpio, Spain; limiting magnitude 18.5; position end figures 02s.81, 36".2; UCAC2 reference stars; image posted at website URL http://ceamig-rea.net/tocp/ngc7485_tocp.png); 16.758, 16.9 (Nick James, Chelmsford, Essex, England; Celestron C11 telescope + ST9XE camera; position end figures 02s.83, 36".0; UCAC-3 reference stars); 18.144, 17.8 (Brimacombe); 18.763, R = 17.3 (Nevski, 0.3-m reflector; position end figures 02s.82, 36".1; UCAC-3 catalogue reference stars).