Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/27129
Title: | Optical spectroscopic observations of gamma-ray blazar candidates. VII. Follow-up campaign in the southern hemisphere | Authors: | Peña-Herazo, H. A. Marchesini, E. J. Álvarez Crespo, N. Ricci, F. Massaro, F. Chavushyan, V. LANDONI, Marco Strader, J. Chomiuk, L. Cheung, C. C. MASETTI, NICOLA Jiménez-Bailón, E. D'Abrusco, R. PAGGI, Alessandro Milisavljevic, D. La Franca, F. Smith, H. A. TOSTI, Gino |
Issue Date: | 2017 | Journal: | ASTROPHYSICS AND SPACE SCIENCE | Number: | 362 | Issue: | 12 | First Page: | 228 | Abstract: | Searching for low energy counterparts of γ -rays 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. | URI: | http://hdl.handle.net/20.500.12386/27129 | URL: | https://link.springer.com/article/10.1007/s10509-017-3208-7 | ISSN: | 0004-640X | DOI: | 10.1007/s10509-017-3208-7 | Bibcode ADS: | 2017Ap&SS.362..228P | Fulltext: | reserved |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | Existing users please |
---|---|---|---|---|
Peña-Herazo2017_Article_OpticalSpectroscopicObservatio.pdf | [Administrators only] | 27.46 MB | Adobe PDF |
Page view(s)
78
checked on Aug 31, 2024
Download(s)
8
checked on Aug 31, 2024
Google ScholarTM
Check
Altmetric
Altmetric
Items in DSpace are published in Open Access, unless otherwise indicated.