SIMBAD references

D. D. Balam, D. Bohlender, D. Monin, and E. Chisholm, Dominion Astrophysical Observatory, National Research Council of Canada, report that images (limiting mag about 21.5) obtained with the 1.82-m Plaskett Telescope on Feb. 8.21 UT show PSN J08264916+2022318 = SN 2011cl at magnitude V = 17.56 (± 0.02), with colors B-V = +0.16 (0.04) and V-R = +0.18; SDSS DR6 magnitudes were converted to Kron-Cousins magnitudes using the conversion formulae of Chonis and Gaskell (2007, A.J. 135, 264) from differential photometry using the SDSS star J082645.70+202333.1. On Feb. 9.309, differential magnitudes/colors measured from the star SDSS J082645.37+202348.8 were V = 17.51 (0.02), B-V = +0.28, and V-R = +0.11; the position of SN 2011cl (which appears associated with IC 2373) is measured to be R.A. = 8:26:49.21, Decl. = +20:22:31.6 (equinox 2000.0).