Observaciones espectroscópicas del blazar S2 0109+22 y su entorno
Abstract
The redshift determination of the gamma-ray extragalactic sources is crucial for the interpretation of their emission models, for population studies and to study the interaction with extragalactic background light, among others. In this work, we will focus on the BL Lac blazar S2 0109+22, detected at very high energies by MAGIC in 2015, with no redshift estimation. Being the spectroscopic redshifts of BL Lac objects a very difficult task to achive, we propouse to make high {signal-to-noise} observations with Gemini not only of the blazar, but of the dozens of objects in its vicinity, with the intention of characterizing the environment of the blazar and performing a population study developed by us, for the estimation of the distance of S2 0109+22. {We obtained and analized} optical spectra with Gemini North during the 2017 period for the source and the surrounding objects, in the spectral range {$4500-8000~\rm{\AA}$. We show preliminary} results of the blazar spectrum analysis and the objects found in their environment.
- Publication:
-
Boletin de la Asociacion Argentina de Astronomia La Plata Argentina
- Pub Date:
- July 2020
- Bibcode:
- 2020BAAA...61B.186P
- Keywords:
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- BL Lacertae objects: individual {(S2 0109+22)};
- galaxies: distances and redshifts;
- galaxies: groups: general