Table 1.
QPO frequencies for TT Ari.
| Observation | Observation details | Passband/ | f peaks | f range | References |
|---|---|---|---|---|---|
| Year | filters | (d−1) | (d−1) | ||
| 1961–1962 | 1 observing run (3 hours) of observations. | UV | 34.1, 81.8 and 103.6 | ... | 1 |
| 1961, 1962 and 1966 | 15 observing runs, each of 2–5 hours. | V and U | ... | 36–140 | 2 |
| 1961–1985 | 30 observing runs. | Varied (U, B, UB, UVB) | 53.3 in 1961, up to 84.7 in 1985 | ... | 3 |
| 1987–1988 | 12 nights of observation. | Filter V | 72 | 65.4–80 | 4 |
| 1988 | 3 nights. Around 250 observations per night. | 3250–5500 Å | 94.1 | ... | 5 |
| 1988 | 16 nights. | 5 bands, but mostly B | 27.9, 52.4, 60.7 and 101.4 | ... | 6 |
| 1987–1998 | 45 observing runs. Over 600 measurements. | Standard UBV system | ... | 41.1–120 | 7 |
| 1994 | 16 nights (258 hours) of observation, 51 299 data points. | Close to B | 48 and 68.5 | 24–139 | 8 |
| 2005 | 51 observational runs, covering 226 hours. | Filter R | 66.7 (mean) | ... | 9 |
| 2012 | 15 days (361 hours) of continuous observation and 21 166 data points. | 3500–7500 Å | 42.5 & 77.5 | 27–98 | 10 |
Notes. Most of the presented studies involve a periodogram analysis and some sort of pre-whitening of unwanted periods. Details about the methods are found in the articles themselves. Columns 4 and 5 show information about frequencies (f) related to QPOs: f peaks refers to specific frequencies found as peaks in the periodogram, while f range presents frequency ranges in which QPOs are more common.
(1) Williams (1966); (2) Smak (2014); (3) Semeniuk et al. (1987); (4) Udalski (1988); (5) Hollander & van Paradijs (1992); (6) Tremko et al. (1996); (7) Kraicheva et al. (1999); (8) Andronov et al. (1999); (9) Kim et al. (2009); (10) dominant frequencies from this work.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.