2002IAUC.8024....1M -
IAU Circ., 8024, 1 (2002/December-0)
Supernova 2002hh in NGC 6946.
MEIKLE P., MATTILA S., SMARTT S., MacDONALD E., CLEWLEY L. and DALTON G.
Abstract (from CDS):
P. Meikle, Imperial College, London; S. Mattila, Stockholm Observatory; and S. Smartt, Institute of Astronomy, Cambridge, report that infrared observations of the type-II supernova 2002hh obtained by E. MacDonald, L. Clewley, and G. Dalton at the William Herschel Telescope (+ infrared camera INGRID) on Nov. 18.86 UT yield J = 12.30 ± 0.03, K_s = 11.07 ± 0.02. Adopting a phase of 21 ± 2 days post-explosion, comparison of the J-K_s color with the infrared-template light curves of Mattila and Meikle (2001, MNRAS 324, 325) indicates that the supernova is highly reddened, with E(J-K_s) = 1.0, confirming the result of Filippenko et al. (IAUC 8007). Using the reddening law of Cardelli et al. (1989, Ap.J. 345, 245), this yields A(V) about 6.1. Subtracting the Galactic extinction (Schlegel et al. 1998, Ap.J. 500, 525) yields a host-galaxy extinction A(V) about 5.0. Adopting a distance of 5.9 Mpc (H_0 = 70; Tully 1988, Nearby Galaxies Catalog) yields de- reddened absolute magnitudes of M(J) = -18.3 and M(K_s) = -18.5, which are close to the values given by the templates of Mattila and Meikle (2001).
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