J/AJ/164/45 grV light curve for 30 RR-Lyrae in the Kepler field (Ngeow, 2022) ================================================================================ Evaluating the V-band Photometric Metallicity with Fundamental Mode RR Lyrae in the Kepler Field. Ngeow C.-C. =2022AJ....164...45N ================================================================================ ADC_Keywords: Stars, variable; Photometry, G band; Photometry, VRI Keywords: RR Lyrae variable stars ; Metallicity ; Light curves Abstract: The aim of this work is to evaluate the performance of photometric metallicity [Fe/H], determined based on V-band light curves photometrically transformed from the gr-band light curves. We tested this by using a set of homogeneous samples of fundamental mode RR-Lyrae located in the Kepler field. It was found that the color term is necessary in such photometric transformation. We demonstrated that when including the color term the determined photometric [Fe/H] are in good agreement with the spectroscopic [Fe/H], either based on the calibrated or the transformed V-band light curves. We also tested the impact of Blazhko RR-Lyrae in determining the photometric [Fe/H], and found that Blazhko RR-Lyrae can give consistent photometric [Fe/H]. Finally, we derived independent gVr-band [Fe/H]-ph31-P relations (where ph31 and P are the Fourier parameter and pulsation period, respectively) using our light curves. The V-band relation is in good agreement with the most recent determination given in the literature. Description: Time-series observations of the 30 targeted RR-Lyrae in the Kepler field were carried out using the 0.41m SLT telescope located at Lulin Observatory. This telescope is an f/8.4 Ritchey-Chretien telescope and is equipped with an Andor iKon-L936 CCD camera, providing a pixel scale of 0.79"/pixel. Queue observations were executed, via commercial software MaxIm DL and ACP Observatory Control Software, from 2019 June 18 to 2021 November 24 (weather permitting) in gVr filters. Depending on the brightness of the targeted RR Lyrae, exposure time varied between 2 to 300s in all filters. File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file targets.dat 19 30 Targets for this work table1.dat 104 4012 grV-band calibrated light-curves for 30 ab-type RR Lyrae in the Kepler Field -------------------------------------------------------------------------------- See also: V/133 : Kepler Input Catalog (Kepler Mission Team, 2009) J/A+AS/105/145 : RR Lyr stars of ome Cen (Petersen 1994) J/A+A/312/111 : [Fe/H] from RR Lyrae light curves (Jurcsik+, 1996) J/MNRAS/398/1757 : RR Lyraes in SDSS stripe 82 (Watkins+, 2009) J/ApJ/708/717 : Light curve templates of RR Lyrae stars (Sesar+, 2010) J/ApJ/750/99 : The Pan-STARRS1 photometric system (Tonry+, 2012) J/ApJ/908/20 : Use of field RRLyrae as galactic probes. II. (Crestani+, 2021) Byte-by-byte Description of file: targets.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 8 I8 --- KIC KIC identifier 10- 19 F10.8 d Per [0.43/0.69] Period -------------------------------------------------------------------------------- Byte-by-byte Description of file: table1.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 8 I8 --- KIC KIC identifier 10- 27 F18.10 d HJDg [2458653/2459544] Heliocentric Julian Date of g-band observation 29- 34 F6.3 mag gmag [7.16/17.8] Apparent g-band magnitude 36- 40 F5.3 mag e_gmag [0.005/0.3] Uncertainty in gmag 42- 59 F18.10 d HJDr [2458653/2459544] Heliocentric Julian Date of r-band observation 61- 66 F6.3 mag rmag [7.24/17.5] Apparent r-band magnitude 68- 72 F5.3 mag e_rmag [0.005/0.4] Uncertainty in rmag 74- 91 F18.10 d HJDv [2458653/2459544] Heliocentric Julian Date of V-band observation 93- 98 F6.3 mag Vmag [7.23/17.8] Apparent V-band magnitude 100-104 F5.3 mag e_Vmag [0.009/0.3] Uncertainty in Vmag -------------------------------------------------------------------------------- History: From electronic version of the journal ================================================================================ (End) Prepared by [AAS], Coralie Fix [CDS], 24-Oct-2022