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TASS Mark III Photometric Survey of the Celestial Equator
The Amateur Sky Survey (TASS) is a loose confederation of amateur andprofessional astronomers. We describe the design and construction of ourMark III system, a set of wide-field drift-scan CCD cameras whichmonitor the celestial equator down to 13th magnitude in severalpassbands. We explain the methods by which images are gathered,processed, and reduced into lists of stellar positions and magnitudes.Over the period 1996 October to 1998 November, we compiled a largedatabase of photometric measurements. One of our results is the tenxcatcatalog, which contains measurements on the standard Johnson-Cousinssystem for 367,241 stars; it contains links to the light curves of thesestars as well.
| Radial velocities. Measurements of 2800 B2-F5 stars for HIPPARCOS
Radial velocities have been determined for a sample of 2930 B2-F5 stars,95% observed by the Hipparcos satellite in the north hemisphere and 80%without reliable radial velocity up to now. Observations were obtainedat the Observatoire de Haute Provence with a dispersion of 80Ä,mm(-1) with the aim of studying stellar and galactic dynamics.Radial velocities have been measured by correlation with templates ofthe same spectral class. The mean obtained precision is 3.0 km s(-1)with three observations. A new MK spectral classification is estimatedfor all stars. Based on observations made at the Haute ProvenceObservatory, France and on data from The Hipparcos Catalogue, ESA.Tables 4, 5 and 6 are only available in electronic form at the CDS viaanonymous ftp to cdsarc.u-strasbg.fr or viahttp://cdsweb.u-strasbg.fr/Abstract.htm
| Meridian observations made with the Carlsberg Automatic Meridian Circle at Brorfelde (Copenhagen University Observatory) 1981-1982
The 7-inch transit circle instrument with which the present position andmagnitude catalog for 1577 stars with visual magnitudes greater than11.0 was obtained had been equipped with a photoelectric moving slitmicrometer and a minicomputer to control the entire observationalprocess. Positions are reduced relative to the FK4 system for each nightover the whole meridian rather than the usual narrow zones. Thepositions of the FK4 stars used in the least squares solution are alsogiven in the catalog.
| The Kreinin-Murri Method for Absolute Determination of Equatorial-Star Declinations.
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| Takýmyýldýz: | Kucuk Kopek |
| Sað Açýklýk: | 08h09m17.90s |
| Yükselim: | -00°07'01.0" |
| Görünürdeki Parlaklýk: | 7.833 |
| Uzaklýk: | 250 parsek |
| özdevim Sað Açýklýk: | -4.3 |
| özdevim Yükselim: | 1.3 |
| B-T magnitude: | 7.922 |
| V-T magnitude: | 7.841 |
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