Optical observations of Eta Carinae at La Plata Observatory
The eclipsing binary system Tr16-1
Update:
Dec 28, 2011
We have presented an analysis of photometric and
spectroscopic observations of this eclipsing binary system in the
Annual Meeting 2003 of the Asociación Argentina de Astronomía. (Spanish ps-file
450Kb)
Introduction:
Tr 16-1 (= CPD -59o2628) is a star with spectral type O9, it's
one of the brightest stars in the inmediate neighbourhood of Eta Carinae
(labeled with the number 3 in the image of the right).
We have
determined its differential photometry using HDE303308 (number 2 in the figure)
as comparison star.
Here, we present the light curves (B, V, R, I)
obtained with the Reflector telescope at La Plata Observatory (OALP),
during the international campaign of Eta Carinae.
Observations:
The images are acquired through Johnson-Cousins BVRI filters with
a Photometrics STAR I CCD camera attached to the 0.8-m reflector
(f/20.06 Cassegrain) at La Plata Observatory, Argentina. The
detector used is a Thomson-CSF TH7883 scientific-grade
front-illuminated chip, Peltier cooled, of 384 x 576 pixels (23 microns
square pixel).
The instrumental configuration results in 1'.9 x 2'.8 field images.
BVRI passbands used are those recommended by Bessell (1990) for coated CCDs.
Results:
Differential photometry of Tr16-1 minus HDE 303308.
Orbital phases were calculated with the following
ephemeris: 2,450,456.8164+1.4693316E days (Freyhammer et al., 2001).
