Bibcode
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
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2
2019
Citations
5
Refereed citations
4
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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