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J/A+A/338/581       Field 3 Palomar-Groningen survey. II. (Schultheis+ 1998)

Field #3 of the Palomar-Groningen survey. II. Near-infrared photometry of semiregular variables. Schultheis M., Ng Y.K., Hron J., Kerschbaum F. <Astron. Astrophys. 338, 581 (1998)> =1998A&A...338..581S (SIMBAD/NED BibCode)
ADC_Keywords: Stars, variable ; Photometry, infrared Keywords: stars: evolution - stars: AGB and post-AGB - Galaxy: center Abstract: Near-infrared photometry (JHKL'M) was obtained for 78 semiregular variables (SRVs) in field #3 of the Palomar-Groningen survey (PG3, l=0°, b=-10°). Together with a sample of Miras in this field a comparison is made with a sample of field SRVs and Miras. The PG3 SRVs form a sequence (period-luminosity & period-colour) with the PG3 Miras, in which the SRVs are the short period extension to the Miras. The field and PG3 Miras follow the same P/(J-K)0 relation, while this is not the case for the field and PG3 SRVs. Both the PG3 SRVs and Miras follow the Sgr I period-luminosity relation adopted from Glass et al. (1995MNRAS.273..383G). They are likely pulsating in the fundamental mode and have metallicities spanning the range from intermediate to approximately solar. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 47 103 Near-infrared photometry for the stars in field #3 of the Palomar-Groningen Variable Star Survey (Plaut, 1971A&AS....4...75P).
See also: J/A+AS/123/115 : Field 3 of the Palomar-Groningen Survey. I. (Ng+ 1997) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 5 A5 --- Name Stellar identifier, from Wesselink (1987) 7- 10 A4 --- VarType Variable type from Plaut (1971A&AS....4...75P) 12- 16 F5.2 mag Jmag J magnitude (1) 18- 22 F5.2 mag Hmag H magnitude (1) 24- 28 F5.2 mag Kmag K magnitude (1) 30- 32 F3.1 mag L'mag ? L' magnitude (1) 34- 36 F3.1 mag Mmag ? M magnitude (1) 38 I1 --- Run Observing run identifier (2) 40- 45 F6.2 d Per ? Period determined by Wesselink (1987) if available 47 I1 --- q_Per [0/3]? Quality flag related with the period and the identification of the star (3)
Note (1): Typical errors are ∼0.02mag in JHK, ∼0.1mag in L' and >0.2mag in M. Note (2): 1: 28 Jul - 2 Aug 1990, Observer: Ng 2: 21 May - 3 Jun 1991, Observer: Brown 3: 20 - 29 Aug 1991 Observer: Ng 4: 16 - 21 Jun 1992, Observers: Ng & Schultheis 5: 29 Jun - 3 Jul 1993, Observers: Ng & Schultheis Note (3): 0: no doubt about the determined period and classification 1: classification is correct but alternative period is possible 2: period determination is correct but the classification is doubtful 3: both period determination and classification are unreliable
Acknowledgements: Mathias Schultheis References: Wesselink Th.J.H., 1987, Ph.D. thesis, Catholic University Nijmegen, the Netherlands
(End) Patricia Bauer [CDS] 11-Sep-1998
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