The Cluster AgeS Experiment (CASE). Detecting Aperiodic Photometric Variability with the Friends of Friends Algorithm

• Autorzy: Rozyczka M. , Narloch W. , Pietrukowicz P. , Thompson I. B. , Pych W. , Poleski R.

Identyfikatory

DOI

10.32023/0001-5237/68.1.3

• Języki publikacji: PL

Abstrakty

EN

We adapt the friends of friends algorithm to the analysis of light curves, and show that it can be succesfully applied to searches for transient phenomena in large photometric databases. As a test case we search OGLE-III light curves for known dwarf novae. A single combination of control parameters allows us to narrow the search to 1% of the data while reaching a ≈90% detection efficiency. A search involving ≈2% of the data and three combinations of control parameters can be significantly more effective - in our case a 100% efficiency is reached. The method can also quite efficiently detect semi-regular variability. In particular, 28 new semi-regular variables have been found in the field of the globular cluster M22, which was examined earlier with the help of periodicity-searching algorithms.

Słowa kluczowe

EN

methods: data analysis; stars: variables: general; globular clusters: individual: M22; galaxy: disk; binaries: close; novae; cataclysmic variables

• Wydawca: Copernicus Foundation for Polish Astronomy
• Czasopismo: Acta Astronomica
• Rocznik: 2018
• Tom: Vol. 68, No. 1
• Strony: 63--78
• Opis fizyczny: Bibliogr. 16 poz., tab., wykr.

Twórcy

autor

Rozyczka M.

• Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences, ul. Bartycka 18, 00-716 Warsaw, Poland

autor

Narloch W.

• Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences, ul. Bartycka 18, 00-716 Warsaw, Poland

autor

Pietrukowicz P.

• Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warsaw, Poland

autor

Thompson I. B.

• The Observatories of the Carnegie Institution for Science, 813 Santa Barbara Street, Pasadena, CA 91101, USA

autor

Pych W.

• Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences, ul. Bartycka 18, 00-716 Warsaw, Poland

autor

Poleski R.

• Department of Astronomy, Ohio State University, 140W. 18th Ave., Columbus, OH43210, USA

Bibliografia

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• Narloch, W., Kaluzny, J., Poleski, R., Rozyczka, M., Pych, W., and Thompson, I.B. 2017, MNRAS, 471, 1476 (N17).
• Patterson, J. 2011, MNRAS, 411, 2695.
• Pietrukowicz, P., Kaluzny, J., Thompson, I. B., Jaroszyński, M., Schwarzenberg-Czerny, A., Krzeminski, W., and Pych, W. 2005, Acta Astron., 55, 261.
• Pietrukowicz, P., et al. 2013, Acta Astron., 63, 115.
• Rosen, S. R., et al. 2016, A&A, 590, A1.
• Rozyczka, M., Thompson, I.B., Pych, W., Narloch, W., Poleski, R., and Schwarzenberg-Czerny, A. 2017, Acta Astron., 67, 203 (R17).
• Sokolovsky, K.V., et al. 2017, MNRAS, 464, 274.
• Szymański, M.K., Udalski, A., Soszyński, I., Kubiak, M., Pietrzyński, G., Poleski, R., Wyrzykowski, Ł., and Ulaczyk, K. 2010, Acta Astron., 60, 295.
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Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).