# Search for strong galaxy-galaxy lensing in SDSS-III BOSS

**Authors:** Xinlun Cheng  
**arXiv:** [1909.08715](https://arxiv.org/abs/1909.08715)  
**Date:** 2019-09-18  
**Summary page:** https://www.summarizepaper.com/en/paper/1909.08715v1/

## Key points

- Study titled "Search for strong galaxy-galaxy lensing in SDSS-III BOSS"
- Explores the phenomenon of strong lensing
- Limited number of known lensing systems
- Applies improved version of spectroscopic lensing search method to SDSS-III BOSS dataset
- Identifies list of highly probable strong lensing candidates
- Conducts follow-up CFHT Megacam imaging observations for five selected systems
- Two potential strong lensing systems found, with at least one image close to central galaxy
- No counter images detected in these cases
- Contributes to understanding of strong galaxy-galaxy lensing and its cosmological applications
- Provides insights into existence and characteristics of rare phenomena in our universe

## Summary

In the study titled "Search for strong galaxy-galaxy lensing in SDSS-III BOSS," Xinlun Cheng explores the fascinating phenomenon of strong lensing, which provides a spectacular view of the universe. While many cosmological applications have been proposed for strong lensing, the number of known lensing systems is still limited. To address this limitation, Cheng applies an improved version of a previously developed spectroscopic lensing search method to the SDSS-III BOSS dataset. The research team identifies a list of highly probable strong lensing candidates using their improved search method. They then conduct follow-up CFHT Megacam imaging observations for five selected systems. Out of these five systems, two are found to be potential strong lensing systems, with at least one image located close to the central galaxy. However, no counter images were detected in these cases. This study contributes to expanding our understanding of strong galaxy-galaxy lensing and its applications in cosmology. By utilizing advanced search methods and conducting follow-up observations, Cheng and his team provide valuable insights into the existence and characteristics of these rare and captivating phenomena in our universe.