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Long-term photometry of variables at ESO. I - The first data catalogue (1982-1986)
This paper presents the catalog of photometric data in the Stromgrensystem obtained during the first four years (October 1982 - September1986) of the Long-Term Photometry of Variables (LTPV) program at ESO.The data are available in computer-readable form.
| Precise positions in the FK4 system for 120 radio source reference stars
Positions are given in the FK4 system for 120 primary reference starsgrouped around the optical counterparts of 11 extragalactic radiosources. The observations were made in 1979 and 1980 with the 6-in.transit circle of the U.S. Naval Observatory. The results reported hererepresent the first step in a three-tiered process to determineastrometric positions of the optical counterparts referred to the systemof the FK4. One application of such positions is the determination of anearly inertial optical reference frame, which eventually may becompared to a reference frame at radio wavelengths.
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Gözlemler ve gökölçümü verileri
| Takýmyýldýz: | Basakci |
| Sað Açýklýk: | 12h51m40.35s |
| Yükselim: | -06°07'59.2" |
| Görünürdeki Parlaklýk: | 8.341 |
| Uzaklýk: | 613.497 parsek |
| özdevim Sað Açýklýk: | 9.4 |
| özdevim Yükselim: | 0.2 |
| B-T magnitude: | 9.665 |
| V-T magnitude: | 8.451 |
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