Meridian observations of comparison stars

Observations of Pulsating Stars

Pulsations discussed will begin at the “top” of the instability strip with pulsating red giants and Miras, which are evolved stars nearing their own demise. The next discussed will be the Cepheids, both the “Classical” ones as well as the W Virginis (Population II stars). While moving down the instability strip of the HR Diagram, the next major type of variable (pulsating) star are the RR Lyrae...

Global reduction with proper motions for meridian observations

When we deal with astrometric observations spread over periods longer than a few years, it is of major importance to take into consideration the proper motions of all objects involved in the reduction process. Not to consider such quantities, mainly when they are poorly known to the majority of the objects, may significantly degrade the final results of the reduction. In this paper, we present ...

EUVE Observations of Neutron Stars

We present the results of searches for EUV emission from neutron stars conducted with the EUVE Deep Survey and Scanner Telescopes. To date, 21 fields containing known neutron stars have been observed in the Lexan/Boron (40–190 Å ) band. Of these, 11 fields were simultaneously observed in the Aluminum/Carbon (160-385 Å ) band. Five neutron stars which have been detected in the EUV have been repo...

IRAS Observations of Scuti Stars

Observations of Cooling Neutron Stars

Observations of cooling neutron stars allow to measure photospheric radii and to constrain the equation of state of nuclear matter at high densities. In this paper we concentrate on neutron stars, which show thermal (photospheric) Xray emission and have measured distances. After a short summary of the radio pulsars falling into this category we review the observational data of the 7 radio quiet...