New observations with gemini and GTC of the VHE blazar KUV 00311–1938: About its redshift and environment

PICHEL, A.; DONZELLI, C.; ROSA-GONZALEZ, D.; ALONSO, M. FERNANDEZ; ROVERO, A.C.; MURIEL, H.; MAYYA, Y.D.; ARETXAGA, I.; GONZÁLEZ, J. BECERRA; CARRAMIÑANA, A.; MENDEZ-ABREU, J.; VEGA, O.; TERLEVICH, E.; TERLEVICH, R.J.

PUBL. ASTRON. SOC. PAC.

IOP Publishing Ltd

Año: 2021 vol. 133 p. 1 - 8

0004-6280

Extragalactic very-high-energy (VHE; E>100 GeV) sources are unique objects to study the most powerful particle accelerators in nature, as active galactic nuclei are likely sources of ultra-high-energy cosmic rays. BL Lacertae blazars are the most frequent extragalactic objects found in the VHE gamma-ray catalogs. It is very difficult to estimate their redshifts, considering they have no strong enough optical spectral features, hence ∼20% of them have unknown or poorly constrained redshifts. KUV 00311?1938 is a VHE BL Lacertae blazar, with an uncertain redshift in the range of 0.5