J/A+A/694/A72 Multi-band templates of RR Lyrae stars (Baeza-Villagra+, 2025)
High-cadence stellar variability studies of RR Lyrae stars with DECam:
New multi-band templates.
Baeza-Villagra K., Rodriguez-Segovia N., Catelan M., Rest A.,
Papageorgiou A., Martinez-Vazquez C.E., Valcarce A.A.R.,
Ferreira Lopes C.E., Bianco F.B.
<Astron. Astrophys. 694, A72 (2025)>
=2025A&A...694A..72B 2025A&A...694A..72B (SIMBAD/NED BibCode)
ADC_Keywords: Milky Way ; Stars, variable ; Photometry, SDSS
Keywords: methods: data analysis - stars: variables: RR Lyrae - Galaxy: bulge
Abstract:
We present the most extensive set to date of high-quality RR Lyrae
light curve templates in the griz bands, based on time-series
observations of the Dark Energy Camera Plane Survey (DECaPS) East
field, located in the Galactic bulge at coordinates
(RA, DEC)(J2000)=(18:03:34, -29:32:02), obtained with the Dark Energy
Camera (DECam) on the 4-m Blanco telescope at the Cerro Tololo
Inter-American Observatory (CTIO). Our templates, which cover both
fundamental-mode (RRab) and first-overtone (RRc) pulsators, can be
especially useful when there is insufficient data for accurately
calculating the average magnitudes and colors, hence distances, as
well as to inform multi-band light curve classifiers, as will be
required in the case of the Vera C. Rubin Observatory's Legacy
Survey of Space and Time (LSST). In this paper, we describe in detail
the procedures that were adopted in producing these templates,
including a novel approach to account for the presence of outliers in
photometry. Our final sample comprises 136 RRab and 144 RRc templates,
all of which are publicly available. Lastly, in this paper we study
the inferred Fourier parameters and other light curve descriptors,
including rise time, skewness, and kurtosis, as well as their
correlations with the pulsation mode, period, and effective
wavelength.
Description:
Properties of RR Lyrae stars in the data sample, including their light
curve parameters and classifications.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tableb1.dat 224 1120 Properties of 136 RRab and 144 RRc stars in
the template data sample
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See also:
J/AcA/69/321 : OGLE RR Lyrae stars in Galactic bulge & disk (Soszynski+, 2019)
Byte-by-byte Description of file: tableb1.dat
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Bytes Format Units Label Explanations
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1- 20 A20 --- Name OGLE identification number
22- 31 F10.8 d Per Pulsation period of the RR Lyrae star
33 A1 --- Band [griz] Photometric band (g, r, i, z)
35- 53 F19.17 mag Amptot Total amplitude of the light curve
55- 74 F20.18 --- R21 Fourier parameter R21
76- 94 F19.17 --- R31 ? Fourier parameter R31
96-114 F19.16 rad phi21 ? Fourier parameter phi21
116-136 F21.18 rad phi31 ? Fourier parameter phi31
138-155 F18.16 --- RT Rise time
157-175 E19.16 --- Skewness Light curve skewness
177-195 F19.16 --- Kurtosis Light curve kurtosis
197-198 I2 --- N Number of terms in the Fourier decomposition
200 I1 --- Q Indicator of quality 1
202-219 F18.16 --- Q' Indicator of quality 2
221-224 A4 --- Type [RRab/RRc] Type of RR Lyrae star (RRab/RRc)
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Acknowledgements:
Karina Baeza-Villagra, karina.baezavillagra(at)students.uniroma2.eu
(End) Patricia Vannier [CDS] 07-Jan-2025