Publication type: Refereed

  • Publication
    CCD BVR photometry of the open cluster IC 1311
    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...
  • Publication
    CCD imaging of NGC 4861: Ionized gas properties and stellar formation
    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...
  • Publication
    CCD Imaging of NGC4861 - Morphology and Brightness Distribution
    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...
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    CCD monitoring of quasars and BL Lacertae objects
    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...
  • Publication
    CCD monitoring of the X-ray variable quasar OX 169
    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...
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    CCD photometry and astrometry for visual double and multiple stars of the HIPPARCOS catalogue. I. Presentation of the large scale project
    A description is given of the activities of an international working group created with the aim of obtaining both photometric and astrometric observations of...
  • Publication
    CCD photometry of 23 minor planets
    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...
  • Publication
    CCD Photometry of Cometary Nuclei, I: Observations from 1990-1995
    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...
  • Publication
    CCD Photometry of M15
    We present CCD observations of the galactic globular cluster M15, in the B and V filters. The cluster was reasonably covered, except in its northern region...