Optical Spectroscopic Observations of Gamma-Ray Blazar Candidates. VII. Follow-up Campaign in the Southern Hemisphere

Searching for low energy counterparts of γ--ray sources is one of the major challenges in modern γ--ray astronomy. In the third Fermi source catalog about 30 % of detected sources are unidentified/unassociated Gamma-ray Sources (UGSs). We recently started an optical spectroscopic follow up campaign...

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Autores principales: Peña-Herazo, H. A., Marchesini, Ezequiel Joaquín, Álvarez Crespo, N., Ricci, F., Massaro, F., Chavushyan, V., Landoni, M., Strader, J., Chomiuk, L., Cheung, C.C., Masetti, N., Jiménez-Bailón, E., D'Abrusco, R., Paggi, A., Milisavljevic, D., La Franca, F., Smith, H. A., Tosti, G.
Formato: Articulo Preprint
Lenguaje:Inglés
Publicado: 2017
Materias:
Ciencias Astronómicas
Galaxies: active
Galaxies: BL Lacertae objects
Quasars: general
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/125614
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-125614
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
Galaxies: active
Galaxies: BL Lacertae objects
Quasars: general
spellingShingle Ciencias Astronómicas
Galaxies: active
Galaxies: BL Lacertae objects
Quasars: general
Peña-Herazo, H. A.
Marchesini, Ezequiel Joaquín
Álvarez Crespo, N.
Ricci, F.
Massaro, F.
Chavushyan, V.
Landoni, M.
Strader, J.
Chomiuk, L.
Cheung, C.C.
Masetti, N.
Jiménez-Bailón, E.
D'Abrusco, R.
Paggi, A.
Milisavljevic, D.
La Franca, F.
Smith, H. A.
Tosti, G.
Optical Spectroscopic Observations of Gamma-Ray Blazar Candidates. VII. Follow-up Campaign in the Southern Hemisphere
topic_facet Ciencias Astronómicas
Galaxies: active
Galaxies: BL Lacertae objects
Quasars: general
description Searching for low energy counterparts of γ--ray sources is one of the major challenges in modern γ--ray astronomy. In the third Fermi source catalog about 30 % of detected sources are unidentified/unassociated Gamma-ray Sources (UGSs). We recently started an optical spectroscopic follow up campaign to confirm the blazar-like nature of candidates counterparts of UGSs. Here we report the spectra of 61 targets collected with the Southern Astrophysical Research Telescope (SOAR) between 2014 and the 2017. Our sample includes 33 potential counterparts of UGSs, selected on the basis of WISE colors, and 27 blazar candidates of uncertain type associated with gamma-ray sources of the last release of the Fermi catalog. We confirm the BZB nature of 20 sources lying within the positional uncertainty region of the UGSs. All the observed BCUs show blazar-like spectra, classified as 2 BZQs and 25 BZBs, for which we obtained 6 redshift estimates. Within the BCUs observations we report the redshift estimate for the BZB associated with, 3FGL J1106.4-3643 that is the second most distant BL Lac known to date, at z≥1.084.
format Articulo
Preprint
author Peña-Herazo, H. A.
Marchesini, Ezequiel Joaquín
Álvarez Crespo, N.
Ricci, F.
Massaro, F.
Chavushyan, V.
Landoni, M.
Strader, J.
Chomiuk, L.
Cheung, C.C.
Masetti, N.
Jiménez-Bailón, E.
D'Abrusco, R.
Paggi, A.
Milisavljevic, D.
La Franca, F.
Smith, H. A.
Tosti, G.
author_facet Peña-Herazo, H. A.
Marchesini, Ezequiel Joaquín
Álvarez Crespo, N.
Ricci, F.
Massaro, F.
Chavushyan, V.
Landoni, M.
Strader, J.
Chomiuk, L.
Cheung, C.C.
Masetti, N.
Jiménez-Bailón, E.
D'Abrusco, R.
Paggi, A.
Milisavljevic, D.
La Franca, F.
Smith, H. A.
Tosti, G.
author_sort Peña-Herazo, H. A.
title Optical Spectroscopic Observations of Gamma-Ray Blazar Candidates. VII. Follow-up Campaign in the Southern Hemisphere
title_short Optical Spectroscopic Observations of Gamma-Ray Blazar Candidates. VII. Follow-up Campaign in the Southern Hemisphere
title_full Optical Spectroscopic Observations of Gamma-Ray Blazar Candidates. VII. Follow-up Campaign in the Southern Hemisphere
title_fullStr Optical Spectroscopic Observations of Gamma-Ray Blazar Candidates. VII. Follow-up Campaign in the Southern Hemisphere
title_full_unstemmed Optical Spectroscopic Observations of Gamma-Ray Blazar Candidates. VII. Follow-up Campaign in the Southern Hemisphere
title_sort optical spectroscopic observations of gamma-ray blazar candidates. vii. follow-up campaign in the southern hemisphere
publishDate 2017
url http://sedici.unlp.edu.ar/handle/10915/125614
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