Kwee-van Woerden method: To use or not to use?

J 2014

Kwee-van Woerden method: To use or not to use?

MIKULÁŠEK, Zdeněk, Marek CHRASTINA, Jiří LIŠKA, Miloslav ZEJDA, Jan JANÍK et. al.

Basic information

Original name

Kwee-van Woerden method: To use or not to use?

Name in Czech

Kwee-van Woerdenova metoda: používat či ne?

Authors

MIKULÁŠEK, Zdeněk (203 Czech Republic, guarantor, belonging to the institution), Marek CHRASTINA (703 Slovakia, belonging to the institution), Jiří LIŠKA (203 Czech Republic, belonging to the institution), Miloslav ZEJDA (203 Czech Republic, belonging to the institution), Jan JANÍK (203 Czech Republic, belonging to the institution), Liying ZHU (156 China) and Shengbang QIAN (156 China)

Edition

Contributions of the Astronomical Observatory Skalnaté Pleso, Tatranská Lomnica (Slovensko), Astronomický ústav SAV, Tatranská Lomnica, 2014, 1335-1842

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10308 Astronomy

Country of publisher

Slovakia

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

URL

Impact factor

Impact factor: 0.591

RIV identification code

RIV/00216224:14310/14:00075667

Organization unit

Faculty of Science

UT WoS

000338483100037

Keywords (in Czech)

Kwee-van Woerden method

Keywords in English

metoda Kwee-van Woerden

Abstract

V originále

The credibility of orbital period analyses of eclipsing binaries strictly depends on the correctness of the observed mid-eclipse time determination, as well as the reliability of its uncertainty estimation. The majority of them have been determined by means of the Kwee-van Woerden method (KWM). There are also other possibilities - e.g. to use physical models of eclipsing binaries or light curve templates and to determine mid-eclipse times using the least square method (LSM). We compared results yielded by both methods by means of a computer simulation on the synthetic model of the AR Aur primary minimum. Minima times determined by the KWM and the exact LSM approach are nearly the same, while the scatter of LSM times is always smaller than the scatter of KWM times. KWM uncertainties are systematically underestimated. We think that the time is ripe for the Kwee-van Woerden method to retire.

Links

LH12175, research and development project

Name: Studium vybraných téměř kontaktních dvojhvězd (Acronym: NCBS)

Investor: Ministry of Education, Youth and Sports of the CR

Citovat

MIKULÁŠEK, Zdeněk, Marek CHRASTINA, Jiří LIŠKA, Miloslav ZEJDA, Jan JANÍK, Liying ZHU and Shengbang QIAN. Kwee-van Woerden method: To use or not to use? Contributions of the Astronomical Observatory Skalnaté Pleso. Tatranská Lomnica (Slovensko): Astronomický ústav SAV, Tatranská Lomnica, 2014, vol. 43, No 3, p. 382-387. ISSN 1335-1842.

@article{1185419,
   author = {Mikulášek, Zdeněk and Chrastina, Marek and Liška, Jiří and Zejda, Miloslav and Janík, Jan and Zhu, Liying and Qian, Shengbang},
   article_location = {Tatranská Lomnica (Slovensko)},
   article_number = {3},
   keywords = {metoda Kwee-van Woerden},
   language = {eng},
   issn = {1335-1842},
   journal = {Contributions of the Astronomical Observatory Skalnaté Pleso},
   title = {Kwee-van Woerden method: To use or not to use?},
   url = {http://www.ta3.sk/caosp/Eedition/Abstracts/2014/Vol_43/No_3/pp382-387_abstract.html},
   volume = {43},
   year = {2014}
}

TY  - JOUR
ID  - 1185419
AU  - Mikulášek, Zdeněk - Chrastina, Marek - Liška, Jiří - Zejda, Miloslav - Janík, Jan - Zhu, Liying - Qian, Shengbang
PY  - 2014
TI  - Kwee-van Woerden method: To use or not to use?
JF  - Contributions of the Astronomical Observatory Skalnaté Pleso
VL  - 43
IS  - 3
SP  - 382-387
EP  - 382-387
PB  - Astronomický ústav SAV, Tatranská Lomnica
SN  - 13351842
KW  - metoda Kwee-van Woerden
UR  - http://www.ta3.sk/caosp/Eedition/Abstracts/2014/Vol_43/No_3/pp382-387_abstract.html
L2  - http://www.ta3.sk/caosp/Eedition/Abstracts/2014/Vol_43/No_3/pp382-387_abstract.html
N2  - The credibility of orbital period analyses of eclipsing binaries strictly depends on the correctness of the observed mid-eclipse time determination, as well as the reliability of its uncertainty estimation. The majority of them have been determined by means of the Kwee-van Woerden method (KWM). There are also other possibilities - e.g. to use physical models of eclipsing binaries or light curve templates and to determine mid-eclipse times using the least square method (LSM). We compared results yielded by both methods by means of a computer simulation on the synthetic model of the AR Aur primary minimum. Minima times determined by the KWM and the exact LSM approach are nearly the same, while the scatter of LSM times is always smaller than the scatter of KWM times. KWM uncertainties are systematically underestimated. We think that the time is ripe for the Kwee-van Woerden method to retire.
ER  -

MIKULÁŠEK, Zdeněk, Marek CHRASTINA, Jiří LIŠKA, Miloslav ZEJDA, Jan JANÍK, Liying ZHU and Shengbang QIAN. Kwee-van Woerden method: To use or not to use? \textit{Contributions of the Astronomical Observatory Skalnaté Pleso}. Tatranská Lomnica (Slovensko): Astronomický ústav SAV, Tatranská Lomnica, 2014, vol.~43, No~3, p.~382-387. ISSN~1335-1842.

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