Stellar uvbybeta photometry in three EUV shadow directions

We present the uvbybeta data used to locate the dust and derive distances for nearby diffuse interstellar clouds in the EUV shadows lb27-31, lb165-32 and lb329+46 discovered by the Extreme Ultraviolet Explorer. The photometrically derived parallaxes of our program stars are compared to the parallaxes listed in the Hipparcos Catalog. Within the photometric distance limit of 150 pc, the photometric parallaxes of 21 ``normal" stars are consistent with the Hipparcos measurements within an uncertainty of 15%. Much as expected for the Strömgren system. Since all program stars are brighter than V~11.5 most of them are included in the Tycho photometry. For our sample of ~ 200 stars we find V_by and V_T to be consistent. Few stars are common to published uvbybeta catalogs, ~ 10, V and the indices compare well apart from beta where a zero point difference of 11 mmag is noticed.

Tables \ref{tab1}-\ref{tab3} are also available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.u-strasbg.fr/Abstract.html

Based on observations at the European Southern Observatory, La Silla, Chile.