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19982026
most citedDifference Image Analysis: Extension to a Spatially Varying Photometric Scale Factor and Other Considerations

103 citations · 996 across the 71 of their papers we have counts for

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astro-ph.SR2026

A Homogenized Catalogue of Variable Stars in the Globular Cluster M22: Membership, Physical Parameters, and Distance

M. A. Yepez, B. Moreno-Amaro, M. Ornelas-Castañeda +2

We present a photometric analysis of the variable stars in the field of the globular cluster M22 (NGC 6656), using time-series photometry from the literature and from OGLE and Gaia…

astro-ph.SR2025

The variable stars in the compact halo globular cluster NGC 5634 visited again

A. Arellano Ferro, R. Michel, M. A. Yepez +3

We present new time-series CCD \emph{VR} photometry of the globular cluster NGC 5634. We aim to use the known RR Lyrae stars, members of the cluster, as indicators of mean metallic…

astro-ph.SR2024★ 1 cited

The variable stars population of the extended young globular cluster NGC 1851

A. Arellano Ferro, C. E. Pérez Parra, M. A. Yepez +3

We report VI CCD photometry of the globular cluster cluster NGC 1851. We aim to study the membership of the variable stars detected in the field of the cluster as listed in the Cat…

astro-ph.SR2024

The variable stars in the field of the bulge cluster NGC 6558

A. Arellano Ferro, L. J. Zerpa Guillen, M. A. Yepez +3

We made a survey of the variable stars in a arcmin centered on the field of the Galactic bulge cluster NGC 6558. A total of 78 variables was found in the fie…

astro-ph.SR2024

Long term CCD photometry of the distant cluster NGC 2419: the CMD revisited

A. Arellano Ferro, S. Muneer, Sunetra Giridhar +4

Employing \emph{VI} images of NGC 2419 acquired over 17 years, light curves for most of the known variables in the field of the cluster are produced. A cluster membership analysis…

astro-ph.SR2023

Variable stars in the field of the Galactic bulge globular cluster NGC 6522

A. Arellano Ferro, Z. Prudil, M. A. Yepez +2

We present a comprehensive analysis of the variable stars projected on the field of the Galactic bulge globular cluster NGC 6522, offering valuable insights into their characterist…