Advanced search
Start date

Optical observations of blazar candidates and unknown gamma-ray sources

Grant number: 16/25484-9
Support type:Scholarships in Brazil - Doctorate
Effective date (Start): June 01, 2017
Effective date (End): November 02, 2020
Field of knowledge:Physical Sciences and Mathematics - Astronomy - Extragalactic Astrophysics
Cooperation agreement: Coordination of Improvement of Higher Education Personnel (CAPES)
Principal Investigator:Rodrigo Nemmen da Silva
Grantee:Raniere Maciel de Menezes
Home Institution: Instituto de Astronomia, Geofísica e Ciências Atmosféricas (IAG). Universidade de São Paulo (USP). São Paulo , SP, Brazil
Associated scholarship(s):18/24801-6 - Multislit spectroscopy of unidentified gamma-ray sources, BE.EP.DR


A considerable fraction of the cataloged gamma-ray sources observed with the Large Area Telescope (LAT) aboard the Fermi Gamma-ray Space Telescope are either blazar candidates of uncertain type (BCUs) or unknown sources (UGS) which have no obvious counterparts at other wavelengths. With the goal of unveiling the nature of these classes of gamma-sources, we propose a multifaceted research project involving optical observations as well as simulations assessing the capabilities of future optical telescopes. The PhD work will consist of the following phases: (i) perform simulations of UGS optical variability to assess the viability of using LSST as an identification machine of gamma-sources; (ii) high-cadence optical monitoring of UGS using the T80 telescope to identify the optical nature of UGS; and (iii) an optical spectroscopic campaign to observe the optical counterparts of BCUs and confirm their blazar nature. (AU)

Scientific publications (4)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
DE MENEZES, RANIERE; D'ABRUSCO, RAFFAELE; MASSARO, FRANCESCO; GASPARRINI, DARIO; NEMMEN, RODRIGO. On the Physical Association of Fermi-LAT Blazars with Their Low-energy Counterparts. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, v. 248, n. 2 JUN 2020. Web of Science Citations: 0.
DE MENEZES, R.; AMAYA-ALMAZAN, R. A.; MARCHESINI, E. J.; PENA-HERAZO, H. A.; MASSARO, F.; CHAVUSHYAN, V; PAGGI, A.; LANDONI, M.; MASETTI, N.; RICCI, F.; D'ABRUSCO, R.; LA FRANCA, F.; SMITH, HOWARD A.; MILISAVLJEVIC, D.; TOSTI, G.; JIMENEZ-BAILON, E.; CHEUNG, C. C. 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. ASTROPHYSICS AND SPACE SCIENCE, v. 365, n. 1 JAN 15 2020. Web of Science Citations: 0.
DE MENEZES, RANIERE; PENA-HERAZO, HAROLD A.; MARCHESINI, EZEQUIEL J.; D'ABRUSCO, RAFFAELE; MASETTI, NICOLA; NEMMEN, RODRIGO; MASSARO, FRANCESCO; RICCI, FEDERICA; LANDONI, MARCO; PAGGI, ALESSANDRO; SMITH, HOWARD A. Optical characterization of WISE selected blazar candidates. Astronomy & Astrophysics, v. 630, SEP 23 2019. Web of Science Citations: 0.
DE MENEZES, RANIERE; CAFARDO, FABIO; NEMMEN, RODRIGO. Milky Way globular clusters in gamma-rays: analysing the dynamical formation of millisecond pulsars. Monthly Notices of the Royal Astronomical Society, v. 486, n. 1, p. 851-867, JUN 2019. Web of Science Citations: 2.

Please report errors in scientific publications list by writing to: