Thirty Seyfert galaxies have been studied for bright sources. The photometry is reported and three of the more unusual galaxies (Mrk 705, Mrk 817, and Mrk 1095)...
Low resolution mapping of Comet Halley in principal atomic and molecular species
Maps of a 3 by 2 arcmin region of the inner coma of comet Halley, at 10 arcsec resolution, in several principal atomic and molecular species were prepared by...
Multiband analysis of the surface brightness distributions of SB and SC spirals CCD images. I - Observations
Results are presented of an imaging study of eight Sb-Sc spirals, based on CCD observations in the B, V, R, I, and Z photometric filters. Presented are grey...
On the radiation-induced polymerization of indene: from laboratory study to astrochemical implications
The radiation-induced polymerization of indene with a γ radiation source was studied at different dose rates (1, 2, 4, 6 kGy/h) and absorbed doses up to 400 kGy...
Secular variations in the spectrum of solar p-modes
The solar p-mode spectrum of very low l is measured with high accuracy for a long enough period of time so as to allow the search for solar cycle variations. In...
Spectrophotometric monitoring of high luminosity active galactic nuceli. I - The methods and data
The 2.5-m Isaac Newton telescope has been used in a spectrophotometric monitoring program of high-luminosity AGN. The data acquisition and analysis techniques...
Spectrophotometry of the HII region S311 (Garcia-Rojas+, 2005)
The observations were made on 2003 March 30 with the UVES, at the VLT Kueyen Telescope in Cerro Paranal Observatory (Chile). We used the standard settings in...
The evolution of CN emission in Halley's comet with heliocentric distance
The authors have made observations of the spectrum of comet Halley on various dates between September 1985 and December 1986, obtaining multipositional long...