J/A+AS/120/275 Mira variables light curves (Alard+ 1996)
Light curves and periods of Mira variables
Alard C., Terzan A., Guibert J.
<Astron. Astrophys. Suppl. Ser. 120, 275 (1996)>
=1996A&AS..120..275A 1996A&AS..120..275A (SIMBAD/NED BibCode)
ADC_Keywords: Stars, variable ; Photometry
Keywords: stars: AGB - infrared: stars - Galaxy: centre
Abstract:
Good distance indicators are needed in studies of the galactic
structure. Pulsating variables can be used, but the problem is to find
a homogeneous sample obeying a period-luminosity relation with low
scatter. In this paper, we show how such a sample can be produced
using the Terzan catalogue of Variables and available Schmidt plates.
We have selected 150 large amplitude variables discovered by Terzan in
a field of 25 sq degrees near the Galactic Centre. A set of 22 red
plates was scanned with the MAMA machine, providing time series for
all the variables. The times series were analysed using both the
periodogram and Renson's method. Periods could be derived for 122
stars of the sample showing clearly that most of these objects are
Miras. As a conclusion we show that with some infrared
photometry, these Miras could be used as good distance indicators in
this region.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3 80 122 Coordinates, periods and R magnitudes of the
Mira variables
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Byte-by-byte Description of file: table3
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Bytes Format Units Label Explanations
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2- 8 A7 --- Terzan Terzan number (1)
10- 11 I2 h RAh Right ascension (J2000.0)
13- 14 I2 min RAm Right ascension (J2000.0)
16- 20 F5.2 s RAs Right ascension (J2000.0)
22 A1 --- DE- Declination sign
23- 24 I2 deg DEd Declination (J2000.0)
26- 27 I2 arcmin DEm Declination (J2000.0)
29- 32 F4.1 arcsec DEs Declination (J2000.0)
35- 40 F6.2 deg GLON Galactic longitude lII
42- 45 F4.2 deg GLAT Galactic latitude bII
48- 52 F5.1 d P Period
54- 58 F5.2 mag Rmagmax R magnitude at maximum
60- 64 F5.2 mag Rmagmin R magnitude at minimum (2)
67- 80 A14 --- Note Notes
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Note (1): Terzan number: see Terzan, A., Bijaoui, A., Ju, K.H., Ounnas, C.
1982A&AS...49..715T 1982A&AS...49..715T = Cat. J/A+AS/49/715
Note (2): The "R magnitude at minimum" is, for some stars, imposed by the
faintest standard available for the calibration.
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Acknowledgements: Jean Guibert
(End) Patricia Bauer [CDS] 26-Jul-1996