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

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 determi...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: 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.
Formato: JOUR
Materias:
BL lacertae objects: individual: RGB 2243 + 203
Galaxies: distances
Redshifts
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00358711_v482_n4_p5422_RosaGonzalez
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
Descripción
Sumario: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. © 2018 The Author(s).

Ejemplares similares