CCD Light Curves of 3 Recent Novae

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Session 46 -- Novae
Display presentation, Wednesday, 1, 1994, 9:20-6:30

[46.04] CCD Light Curves of 3 Recent Novae

K.Hagemann, P.J.Benson (Wellesley C.)

We show CCD differential light curves for Nova Cygni 1992 ({\sl VRI}), N93 Aql ({\sl BVRI}), and N93 Cas ({\sl BVRI}).

N93 Aql declined in brightness rapidly to a minimum at about JD 2449190. It then brightened fairly rapidly in the next month. The brightening appeared to be levelling off in the B and V filters when we could no longer observe as Aquila faded into the twilight in early November (JD 2449300). It had started to fade again in I and R in early September (JD 2449232).

In contrast, N93 Cas appeared to have more structure in the early light curves. There is a pronounced dip in the I curve at about January 18 (JD 2449371), whereas the dip is more pronouced in the B and V curves at about February 3 (JD 2449387). The light faded rapidly in all filters between February 7 and February 22 (about 0.4 mag/day in B). After that, the decline slowed somewhat.

We thank the W. M. Keck Foundation for the CCD camera and its support of astronomy at Wellesley College through the Keck Northeast Astronomy Consortium, NSF grant 8913001 for summer support of KH, and the Brachman Hoffman Research Fellowship (PJB) awarded by Wellesley College for partial support of this research.

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