Advanced search
Start date
Betweenand
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Optical spectroscopic observations of gamma-ray blazar candidates. X. Results from the 2018-2019 SOAR and OAN-SPM observations of blazar candidates of uncertain type

Full text
Author(s):
Show less -
de Menezes, R. [1, 2] ; Amaya-Almazan, R. A. [3] ; Marchesini, E. J. [4, 5, 1, 6, 7] ; Pena-Herazo, H. A. [4, 1, 8, 3] ; Massaro, F. [4, 1, 8, 9] ; Chavushyan, V [3] ; Paggi, A. [4, 8] ; Landoni, M. [10] ; Masetti, N. [11, 7] ; Ricci, F. [12, 13] ; D'Abrusco, R. [14] ; La Franca, F. [15] ; Smith, Howard A. [14] ; Milisavljevic, D. [16] ; Tosti, G. [17] ; Jimenez-Bailon, E. [18] ; Cheung, C. C. [19]
Total Authors: 17
Affiliation:
Show less -
[1] Univ Torino, Dipartimento Fis, Via Pietro Giuria 1, I-10125 Turin - Italy
[2] Univ Sao Paulo, Dept Astron, BR-05508090 Sao Paulo, SP - Brazil
[3] Inst Nacl Astrofis Opt & Electr, Apartado Postal 51-216, Puebla 72000 - Mexico
[4] Ist Nazl Fis Nucl, Sez Torino, I-10125 Turin - Italy
[5] Univ Nacl La Plata, Fac Ciencias Astron & Geofis, La Plata - Argentina
[6] CONICET UNLP, CCT La Plata, Inst Astrofis La Plata, La Plata - Argentina
[7] INAF, Osservatorio Astrofis & Sci Spazio, Via Gobetti 93-3, I-40129 Bologna - Italy
[8] INAF, Osservatorio Astrofis Torino, Via Osservatorio 20, I-10025 Pino Torinese - Italy
[9] CIFS, Via Pietro Giuria 1, I-10125 Turin - Italy
[10] INAF, Osservatorio Astron Brera, Via Emilio Bianchi 46, I-23807 Merate - Italy
[11] Univ Andres Bello, Dept Ciencias Fis, Fernandez Concha 700, Santiago - Chile
[12] Pontificia Univ Catolica Chile, Fac Fis, Inst Astrofis, Casilla 306, Santiago 22 - Chile
[13] Pontificia Univ Catolica Chile, Fac Fis, Ctr Astroingn, Casilla 306, Santiago 22 - Chile
[14] Harvard & Smithsonian, Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 - USA
[15] Univ Roma Tre, Dipartimento Matemat & Fis, Via Vasca Navale 84, I-00146 Rome - Italy
[16] Purdue Univ, Dept Phys & Astron, 525 Northwestern Ave, W Lafayette, IN 47907 - USA
[17] Univ Perugia, Dipartimento Fis, I-06123 Perugia - Italy
[18] Univ Nacl Autonoma Mexico, Inst Astron, Apdo Postal 877, Ensenada 22800, Baja California - Mexico
[19] Naval Res Lab, Space Sci Div, Code 7650, Washington, DC 20375 - USA
Total Affiliations: 19
Document type: Journal article
Source: ASTROPHYSICS AND SPACE SCIENCE; v. 365, n. 1 JAN 15 2020.
Web of Science Citations: 0
Abstract

The fourth Fermi Large Area Telescope Source Catalog (4FGL) lists over 5000. -ray sources with statistical significance above 4s. About 23% of the sources listed in this catalog are unidentified/unassociated. -ray sources while 26% of the sources are classified as blazar candidates of uncertain type (BCUs), lacking optical spectroscopic information. To probe the blazar nature of candi- date counterparts of UGSs and BCUs, we started our optical spectroscopic follow up campaign in 2012, which up to date account for more than 350 observed sources. In this paper, the tenth of our campaign, we report on the spectroscopic observations of 37 sources, mostly BCUs, whose observations were carried out predominantly at the Observatorio Astronomico Nacional San Pedro Martir and the Southern Astrophysical Research Observatory between August 2018 and September 2019. We confirm the BL Lac nature of 27 sources and the flat spectrum radio quasar nature of three sources. The remaining ones are classified as six BL Lacs galaxy-dominated and one normal galaxy. We were also able to measure the redshifts for 20 sources, including 10 BL Lacs. As in previous analyses, the largest fraction of BCUs revealed to be BL Lac objects. (AU)

FAPESP's process: 16/25484-9 - Optical observations of blazar candidates and unknown gamma-ray sources
Grantee:Raniere Maciel de Menezes
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 18/24801-6 - Multislit spectroscopy of unidentified gamma-ray sources
Grantee:Raniere Maciel de Menezes
Support type: Scholarships abroad - Research Internship - Doctorate