New GTC spectroscopic data and a statistical study to better constrain the redshift of the BL Lac RGB J2243 + 203

Bibcode
2019MNRAS.482.5422R
DOI
10.1093/mnras/sty3065
Rosa González, D.; Muriel, H.; Mayya, Y. D.; Aretxaga, I.; Becerra González, J.; Carramiñana, A.; Méndez-Abreu, J.; Vega, O.; Terlevich, E.; Coutiño de León, S.; Furniss, A.; Longinotti, A. L.; Terlevich, R. J.; Pichel, A. C.; Rovero, A. C.; Donzelli, C.
Bibliographical reference

Monthly Notices of the Royal Astronomical Society, Volume 482, Issue 4, p.5422-5429

Advertised on:
2
2019
Journal
Monthly Notices of the Royal Astronomical Society
Number of authors
16
IAC number of authors
2
Citations
3
Refereed citations
3
Description
We present new spectroscopic data of the BL Lac RGB 2243 + 203, and its surroundings, obtained with the OSIRIS Multi Object Spectrograph (MOS) mounted in the Gran Telescopio Canarias (GTC). The spectra of neither the BL Lac nor its host galaxy show any spectral feature, thus hindering direct determination of its redshift. The spectroscopic redshift distribution of objects in the MOS field of view shows four galaxies with redshift between 0.5258 and 0.5288. We make use of a statistical analysis to test the possibility that the targeted BL Lac may be a member of that group. By using the spectroscopic redshifts obtained with our GTC observations, we found that this probability is between 86 and 93 per cent.
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Abell 370 is located approximately 4 billion light-years away in the constellation Cetus, the Sea Monster
Galaxy Evolution in Clusters of Galaxies

Galaxies in the universe can be located in different environments, some of them are isolated or in low density regions and they are usually called field galaxies. The others can be located in galaxy associations, going from loose groups to clusters or even superclusters of galaxies. One of the foremost challenges of the modern Astrophysics is to

Jairo
Méndez Abreu
In progress
Project Image
Particle Astrophysics

The MAGIC Collaboration is integrated by 20 research institutes and university departments from Armenia, Bulgaria, Finland, Germany, Italy, Poland, Spain, Switzerland and USA. The collaboration comprises two 17m diameter telescopes, located at the Roque de los Muchachos Observatory, designed to measure the Cherenkov radiation associated with

Ramón
García López
In progress
Project Image
Particle Astrophysics

The MAGIC Collaboration is integrated by 20 research institutes and university departments from Armenia, Bulgaria, Finland, Germany, Italy, Poland, Spain, Switzerland and USA. The collaboration comprises two 17m diameter telescopes, located at the Roque de los Muchachos Observatory, designed to measure the Cherenkov radiation associated with

Ramón
García López
In progress
Type
Refereed
BL Lacertae objects
Galaxies
Formation & Evolution of Galaxies (FYEG)
Cosmology & Astroparticles (CYA, CTA)

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