SMARTS observations
of
Nova LMC 2005

ANDICAM image
Andicam I band image of Nova LMC 2005 on 3/11/06

ANDICAM BVRI photometry
ANDICAM JHK photometry
Andicam Photometry of Nova LMC 2005 through 2006 May 24

Commentary

The photometry shown above is differential, with respect to 18 stars in the field. I have yet to calibrate the field.

SMARTS was closed 12/23-1/09, hence a lack of data during that interval.

The movies are interpolated spectra from the 1.5m, from Jan 10 through Feb 6 2006. The fluxes are scaled to the photometry. The dropouts in the blue movie longward in 4500A are due to a grating shift; on those nights we moved shorter we get the Ca II and K lines. We also have some low dispersion spectra covering the 3500-5300A region.

The nova is clearly a slow nova, with lot of structure in its light curve. A rapid fading began about January 15, only to be interrupted by a brief recovery about 3 weeks later.The optical fading has continued; the star is now down about 3 mag from its peak at B and V, and about 2.5 mag at R, I, and J. Meanwhile, it seems a dust shell formed, with the H and K fluxes peaking about March 10. The system has since faded about 0.5 mag at K

blue spectrum
blue spectrum
Most recent low dispersion spectra of the nova

If it is a DQ Her-type, we can expect the bottom to drop out any day now. Otherwise it may just linger and fade slowly and erratically.

There was a clear P Cygni wind absorption signature through March 17; thereafter the spectrum becomes more nebular.

N LMC 2005 is currently behind the Sun.