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A mid-term astrometric and photometric study of Trans-Neptunian Object (90482) Orcus
J. L. Ortiz, A. Cikota, S. Cikota +7
From CCD observations of a fixed and large star field that contained the binary TNO Orcus, we have been able to derive high-precision relative astrometry and photometry of the Orcu…
Observation of light echoes around very young stars
J. L. Ortiz, B. E. K. Sugerman, I. de la Cueva +5
The goal of the paper is to present new results on light echoes from young stellar objects. Broad band CCD images were obtained over three months at one-to-two week intervals for t…
Short-term variability of a sample of 29 trans-Neptunian objects and Centaurs
A. Thirouin, J. L. Ortiz, R. Duffard +3
We present results of 6 years of observations, reduced and analyzed with the same tools in a systematic way. We report completely new data for 15 objects, for 5 objects we present…
Recent GRBs observed with the 1.23m CAHA telescope and the status of its upgrade
Javier Gorosabel, Petr Kubanek, Martin Jelinek +13
We report on optical observations of Gamma-Ray Bursts (GRBs) followed up by our collaboration with the 1.23m telescope located at the Calar Alto observatory. The 1.23m telescope is…