The SOAR Gravitational Arc Survey - I: Survey overview and photometric catalogs
Cristina Furlanetto, Basilio X. Santiago, Martin Makler, Eduardo S., Cypriano, Gabriel B. Caminha, Maria Elidaiana da Silva Pereira, Angelo Fausti, Neto, Juan Estrada, Huan Lin, Jiangang Hao, Timothy A. McKay, Luiz Nicolaci, da Costa, and Marcio A. G. Maia

TL;DR
The SOAR Gravitational Arc Survey (SOGRAS) imaged 47 galaxy clusters at two redshifts, creating photometric catalogs, identifying gravitational arc candidates, and providing initial insights into strong lensing efficiency across redshifts.
Contribution
This paper presents the first results of SOGRAS, including imaging, catalog creation, and the identification of gravitational arc candidates in a systematic survey of galaxy clusters.
Findings
Detected 16 gravitational arc candidates around 8 clusters.
Found a red sequence of galaxies in most low-redshift clusters.
Approximately 10% of clusters show strong lensing features.
Abstract
We present the first results of the SOAR (Southern Astrophysical Research) Gravitational Arc Survey (SOGRAS). The survey imaged 47 clusters in two redshift intervals centered at and , targeting the richest clusters in each interval. Images were obtained in the , and bands using the SOAR Optical Imager (SOI), with a median seeing of 0.83, 0.76 and 0.71 arcsec, respectively, in these filters. Most of the survey clusters are located within the Sloan Digital Sky Survey (SDSS) Stripe 82 region and all of them are in the SDSS footprint. Photometric calibration was therefore performed using SDSS stars located in our SOI fields. We reached for galaxies in all fields the detection limits of , and for a signal-to-noise ratio (S/N) = 3. As a by-product of the image processing, we generated a source catalogue with 19760 entries,…
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