The Taiwanese-American Occultation Survey Project Stellar Variability. II. Detection of 15 Variable Stars

Mondal , S. and Lin, C. C. and Chen, W. P. and Zhang, Z.-W. and Alcock, C. and Axelrod, T. and Bianco, F. B. and Byun, Y.-I. and Coehlo, N. K. and Cook, K. H. and Dave, R. and Kim, D.-W. and King, S.-K. and Lee, T. and Lehner, M. J. and Lin, H.-C. and Marshall, S. L. and Protopapas, P. and Rice, J. A. and Schwamb, M. E. and Wang, J.-H. and Wang, S.-Y. and Wen, C.-Y. (2010) The Taiwanese-American Occultation Survey Project Stellar Variability. II. Detection of 15 Variable Stars. Astronomical Journal, 139 (5). pp. 2026-2033. ISSN 0004-6256 http://resolver.caltech.edu/CaltechAUTHORS:20100607-120632782

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Abstract

The Taiwanese-American Occultation Survey (TAOS) project has collected more than a billion photometric measurements since 2005 January. These sky survey data—covering timescales from a fraction of a second to a few hundred days—are a useful source to study stellar variability. A total of 167 star fields, mostly along the ecliptic plane, have been selected for photometric monitoring with the TAOS telescopes. This paper presents our initial analysis of a search for periodic variable stars from the time-series TAOS data on one particular TAOS field, No. 151 (R.A. = 17^(h)30^(m)6^(s).7, decl. = 27°17'30", J2000), which had been observed over 47 epochs in 2005. A total of 81 candidate variables are identified in the 3 deg^2 field, with magnitudes in the range 8 < R < 16. On the basis of the periodicity and shape of the light curves, 29 variables, 15 of which were previously unknown, are classified as RR Lyrae, Cepheid, δ Scuti, SX Phonencis, semi-regular, and eclipsing binaries.

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Article

Additional Information:

© 2010 American Astronomical Society. Received 2009 September 22; accepted 2010 March 8; published 2010 April 8. The work at National Central University was supported by the grant NSC 96-2112-M-008-024-MY3. Y.I.B. acknowledges the support of the National Research Foundation of Korea through grant 2009-0075376. Work at Academia Sinica was supported in part by the thematic research program AS-88-TP-A02. Work at the Harvard College Observatory was supported in part by the National Science Foundation under grant AST-0501681 and by NASA under grant NNG04G113G. S.L.M.’s work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory in part under Contract W-7405-Eng-48 and by Stanford Linear Accelerator Center under Contract DE-AC02-76SF00515. K.H.C.’s work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory in part under ContractW-7405-Eng-48 and in part under Contract DEAC52-07NA27344.

Funders:

Funding Agency	Grant Number
NSC	NSC 96-2112-M-008-024-MY3
National Research Foundation of Korea	2009-0075376
Academica Sinica	AS-88-TP-A02
NSF	AST-0501681
NASA	NNG04G113G
U. S. Department of Energy	W-7405-Eng-48
Stanford Linear Accelerator Center	DE-AC02-76SF00515
U. S. Department of Energy	DEAC52-07NA27344

Subject Keywords:

methods: data analysis; stars: imaging; stars: variables: Cepheids; stars: variables: delta Scuti; stars: variables: general; stars: variables: RR Lyrae; surveys

Classification Code:

PACS: 97.30.Gj; 97.30.Kn; 97.30.Dg; 97.30.Jm; 95.85.Kr; 97.10.Ri

Record Number:

CaltechAUTHORS:20100607-120632782

Persistent URL:

http://resolver.caltech.edu/CaltechAUTHORS:20100607-120632782

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Official Citation:

S. Mondal et al 2010 The Astronomical Journal 139 2026 doi: 10.1088/0004-6256/139/5/2026

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No commercial reproduction, distribution, display or performance rights in this work are provided.

ID Code:

18581

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CaltechAUTHORS

Deposited By:

Jason Perez

Deposited On:

09 Jun 2010 14:59

Last Modified:

26 Dec 2012 12:06

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