2008CBET.1409....1D

A. J. Drake, A. Mahabal, S. G. Djorgovski, M. J. Graham, and R. Williams, California Institute of Technology; E. C. Beshore and S. M. Larson, Lunar and Planetary Laboratory, University of Arizona; and E. Christensen, Gemini Observatory, report the discovery of seven apparent supernovae that were detected in multiple sequences of unfiltered CCD exposures of the Catalina Sky Survey (CSS) using the 0.7-m f/1.9 Catalina Schmidt telescope (+ 4000x4000 camera): SN 2008 UT R.A. (2000.0) Decl. Mag. Offset 2008dc Apr. 6.47 16 47 29.45 +09 18 25.8 18.1 - 2008dd Apr. 9.35 17 04 03.60 +21 35 42.0 17.7 - 2008de Apr. 17.38 15 55 24.97 -09 41 47.1 16.7 - 2008df May 5.37 16 06 25.06 +10 05 21.4 19.2 - 2008dg June 8.26 12 58 50.55 +24 22 57.4 18.5 7".0 E, 11".4 N 2008dh June 8.44 00 35 11.32 +23 15 15.1 16.6 12".6 E, 2".9 S 2008di June 11.19 12 16 41.53 +41 02 11.2 17.7 5".5 W, 11".8 S SN 2008dc was discovered and made public in CSS data and was later independently rediscovered and spectroscopically confirmed by the "Supernova Factory" collaboration (and posted at the following website URL: http://snfactory.lbl.gov/snf/open_access/snlist.php; they found 2008dc to be a type-Ib/c supernova at z = 0.02). Additional CSS magnitudes for 2008dd: Mar. 3.51 UT, [19.8; 23.51, 18.7; Apr. 9.35, 17.7; 16.38, 18.0; 26.45, 18.4; May 3.12, 18.5; 10.35, 18.6; June 11.32, 19.2. The host galaxy of 2008dd (J170403.64+213542.0) has Sloan Digital Sky Survey (SDSS) magnitudes g = 20.5, r = 20.1, and i = 19.8, and photometric redshift z = 0.043. SN 2008de was discovered and made public in CSS data and was also later independently rediscovered and spectroscopically confirmed by the "Supernova Factory" collaboration (who found it to be a type-II supernova at z = 0.04). Additional CSS magnitudes for 2008df: Apr. 13.38, [20.5; 28.43, 19.7; May 5.37, 19.2; 13.29, 18.9; June 6.26, 19.0. The host galaxy of 2008df (SDSS J160625.09+100521.0) has SDSS magnitudes g = 22.1, r = 21.8, i = 21.7. Additional magnitudes for 2008dg: Apr. 29.26, [20.0 (CSS); June 8.26, 18.5 (CSS); 16.25, 19.0 (Palomar 1.52-m reflector + Gunn r filter; non- photometric conditions). The host galaxy of 2008dg has SDSS magnitudes g = 17.8, r = 17.5, and i = 17.21, and photometric z = 0.043. Additional magnitudes for 2008dh: Feb. 13.08, [19.0 (CSS); June 8.44, 16.6 (CSS); 10.42, 16.4 (Palomar 1.52-m reflector + Gunn r filter); 11.42, 16.3 (Palomar; Gunn r). The host galaxy of 2008dh (2MASX J00351050+2315184) has 2MASS magnitudes J = 14.7, H = 14.2, and K = 13.8.