About 200 CCD images of the comet C/1996 B2 - HYAKUTAKE were obtained and reduced, using four approaches by PPM stars and one by a GSC star, on March 20, 24, 25...

Six CCD frames for two fields in the area of the rich, presumably old, and unstudied open cluster IC 1311 have been obtained in the BVR bands. The photometric...

This work undertakes the study of the galaxy NGC 4861, using imaging centered at the strong lines H-alpha, H-beta, (O III) lambda 5007 and nearby continua...

We discuss narrow band CCD imaging of NGC 4861 in continua at 4500 A, 5300 A and 6300 A as well as in Hα, Hβ and (O III] λ5007 A lines. We find that the system...

Johnson B CCD photometry of quasars and other active nuclei were obtained with the 1-m and 2.5-m reflectors of the Roque de los Muchachos Observatory in the...

Three nights of broadband filter monitoring of the OX 169 variable X-ray quasar using a GEC-type CCD have yielded a 0.005 mag rms precision in the R band. Rapid...

A description is given of the activities of an international working group created with the aim of obtaining both photometric and astrometric observations of...

We present CCD photometric observations of 23 main-belt asteroids, of which 8 have never been observed before; thus, the data of these objects are the first in...

CCD photometry of 18 Jupiter family comets, observed at medium and large heliocentric distances, was carried out between April 1990 and July 1995. This is part...