Оглавление
Изображения
Загрузить ваше изображение
DSS Images Other Images
Публикации по объекту
New periodic variables from the Hipparcos epoch photometry
Two selection statistics are used to extract new candidate periodicvariables from the epoch photometry of the Hipparcos catalogue. Theprimary selection criterion is a signal-to-noise ratio. The dependenceof this statistic on the number of observations is calibrated usingabout 30000 randomly permuted Hipparcos data sets. A significance levelof 0.1 per cent is used to extract a first batch of candidate variables.The second criterion requires that the optimal frequency be unaffectedif the data are de-trended by low-order polynomials. We find 2675 newcandidate periodic variables, of which the majority (2082) are from theHipparcos`unsolved' variables. Potential problems with theinterpretation of the data (e.g. aliasing) are discussed.
| Photoelectric Observations in a Wide-Field Area around the Praesepe Cluster
Not Available
| Photoelectric observations of lunar occultations. XII
Occultation observations of 414 events observed between 6 July 1979 and4 September 1980 with the 0.76-m telescope of McDonald Observatory arereported. Timings and data on double stars are given. Angular diameterinformation in six cases is included. The stars concerned with their runnumbers are: SAO 161754 (5270); 94027 (Alpha Tau) (5319, 5381, 5454);159370 (Gamma Lib) (5325, 5571); 162413 (43 Sgr) (5332); 97472 (3 Cnc)(5414); and 93955 (Theta Tau) (5445).
|
Добавить новую статью
Внешние ссылки
- - Внешних ссылок не найдено -
Добавить внешнюю ссылку
Группы:
|
Наблюдательные данные и астрометрия
| Созвездие: | Рак |
| Прямое восхождение: | 08h46m19.61s |
| Склонение: | +16°02'12.0" |
| Видимая звёздная величина: | 8.73 |
| Расстояние: | 244.499 парсек |
| Собственное движение RA: | -64.7 |
| Собственное движение Dec: | -1.3 |
| B-T magnitude: | 9.109 |
| V-T magnitude: | 8.762 |
Каталоги и обозначения:
|
INHABITED SKY
