2003 MC7
Scritto
in Pubblicazioni
Available from the Minor Planet Center.
Available from the Minor Planet Center.
Transient Heavy Element Absorption Systems in Novae: Episodic Mass Ejection from the Secondary Star
Scritto
in Pubblicazioni
A high-resolution spectroscopic survey of post-outburst novae reveals short-lived heavy element absorption systems in a majority of novae near maximum light, having expansion velocities of 400-1000 km s<SUP>-1</SUP> and velocity dispersions between 35 and 350 km s<SUP>-1</SUP>. A majority of systems are accelerated outward, and they all progressively weaken and disappear over timescales of weeks. A few of the systems having narrow, deeper absorption reveal a rich spectrum of singly ionized Sc, Ti, V, Cr, Fe, Sr, Y, Zr, and Ba lines. Analysis of the richest such system, in LMC 2005,...
continuaCOMET C/20
Scritto
in Pubblicazioni
Available from the Minor Planet Center.
Available from the Minor Planet Center.
A Comparative Test of CCD Reduction Procedures
Scritto
in Pubblicazioni
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.
Minor Planet Observations [644 Palomar Mountain/NEAT]
Scritto
in Pubblicazioni
Not Available