Three data reduction methods, applicable to time-resolved CCD photometry
of open clusters, are described. A sample set of images is reduced
independently by three people, using various approaches, and the results
are compared. The test reveals systematic differences in the FWHM and
magnitudes produced by the different software. The reduction package MOMF and pure aperture photometry are found to be equivalent in
precision, but the results obtained with these methods should not be
merged when high precision is required.
Aims.We present optical and near-infrared spectral evolution of the
Galactic nova <ASTROBJ>V5114 Sgr</ASTROBJ> (2004) during few months
after the outburst.<BR /> Methods: .We use multi-band photometry and
line intensities derived from spectroscopy to put constrains on the
distance and the physical conditions of the ejecta of V5114 Sgr.<BR />
Results: .The nova showed a fast decline (t<SUB>2</SUB> ≃ 11 days)
and spectral features of Fe II spectroscopic class. It reached
M<SUB>V</SUB> = -8.7 ± 0.2 mag at maximum light, from which we
derive a…
Data files of FEROS observations are given with four digits (referring
to month and day of observation) and an "f" indicating that that is a FEROS observation.
Data files of observations carried out at Cerro Tololo are named with
four digits (referring to month and day of observation) and a "t"
indicating that these are CTIO observations.
Observations carried out with the NIRIS instrument are given in three
dat files. Although they were carried out on a single night, for
uniformity with the rest of the files, these data files are named with
four digits (referring to…
