Looking for blazars in a sample of unidentified high-energy emitting Fermi sources

Autores
Marchesini, Ezequiel Joaquín; Masetti, Nicola; Chavushyan, V.; Cellone, Sergio Aldo; Andruchow, Ileana; Bassani, L.; Bazzano, A.; Jiménez-Bailón, E.; Landi, R.; Malizia, A.; Palazzi, E.; Patiño Álvarez, V.; Rodríguez Castillo, G. A.; Stephen, J. B.; Ubertini, P.
Año de publicación
2016
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Context. Based on their overwhelming dominance among associated Fermi γ-ray catalogue sources, it is expected that a large fraction of the unidentified Fermi objects are blazars. Through crossmatching between the positions of unidentified γ-ray sources from the First Fermi Catalog of γ-ray sources emitting above 10 GeV (1FHL) and the ROSAT and Swift/XRT catalogues of X-ray objects and between pointed XRT observations, a sample of 36 potential associations was found in previous works with less than 15 arcsec of positional offset. One-third of them have recently been classified; the remainder, though believed to belong to the blazar class, still lack spectroscopic classifications. Aims. We study the optical spectrum of the putative counterparts of these unidentified gamma-ray sources in order to find their redshifts and to determine their nature and main spectral characteristics. Methods. An observational campaign was carried out on the putative counterparts of 13 1FHL sources using medium-resolution optical spectroscopy from the Osservatorio Astronomico di Bologna in Loiano, Italy; the Telescopio Nazionale Galileo and the Nordic Optical Telescope, both in the Canary Islands, Spain; and the Observatorio Astronómico Nacional San Pedro Mártir in Baja California, Mexico. Results. We were able to classify 14 new objects based on their continuum shapes and spectral features. Conclusions. Twelve new blazars were found, along with one new quasar and one new narrow line Seyfert 1 (NLS1) to be potentially associated with the 1FHL sources of our sample. Redshifts or lower limits were obtained when possible alongside central black hole mass and luminosity estimates for the NLS1 and the quasar.
Fil: Marchesini, Ezequiel Joaquín. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina
Fil: Masetti, Nicola. Istituto di Astrofisica Spaziale e Fisica Cosmica di Bologna; Italia
Fil: Chavushyan, V.. Instituto Nacional de Astrofísica, Óptica y Electrónica; México
Fil: Cellone, Sergio Aldo. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina
Fil: Andruchow, Ileana. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina
Fil: Bassani, L.. Istituto di Astrofisica Spaziale e Fisica Cosmica di Bologna; Italia
Fil: Bazzano, A.. Istituto di Astrofisica e Planetologia Spaziali; Italia
Fil: Jiménez-Bailón, E.. Universidad Nacional Autónoma de México; México
Fil: Landi, R.. Istituto di Astrofisica Spaziale e Fisica Cosmica di Bologna; Italia
Fil: Malizia, A.. Istituto di Astrofisica Spaziale e Fisica Cosmica di Bologna; Italia
Fil: Palazzi, E.. Istituto di Astrofisica Spaziale e Fisica Cosmica di Bologna; Italia
Fil: Patiño Álvarez, V.. Instituto Nacional de Astrofísica, Óptica y Electrónica; México
Fil: Rodríguez Castillo, G. A.. Osservatorio Astronomico di Roma; Italia
Fil: Stephen, J. B.. Istituto di Astrofisica Spaziale e Fisica Cosmica di Bologna; Italia
Fil: Ubertini, P.. Istituto di Astrofisica e Planetologia Spaziali; Italia
Materia
Gamma rays
X rays
Active galaxies
BL Lacertae objects
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/37791
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/37791
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Looking for blazars in a sample of unidentified high-energy emitting Fermi sourcesMarchesini, Ezequiel JoaquínMasetti, NicolaChavushyan, V.Cellone, Sergio AldoAndruchow, IleanaBassani, L.Bazzano, A.Jiménez-Bailón, E.Landi, R.Malizia, A.Palazzi, E.Patiño Álvarez, V.Rodríguez Castillo, G. A.Stephen, J. B.Ubertini, P.Gamma raysX raysActive galaxiesBL Lacertae objectshttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Context. Based on their overwhelming dominance among associated Fermi γ-ray catalogue sources, it is expected that a large fraction of the unidentified Fermi objects are blazars. Through crossmatching between the positions of unidentified γ-ray sources from the First Fermi Catalog of γ-ray sources emitting above 10 GeV (1FHL) and the ROSAT and Swift/XRT catalogues of X-ray objects and between pointed XRT observations, a sample of 36 potential associations was found in previous works with less than 15 arcsec of positional offset. One-third of them have recently been classified; the remainder, though believed to belong to the blazar class, still lack spectroscopic classifications. Aims. We study the optical spectrum of the putative counterparts of these unidentified gamma-ray sources in order to find their redshifts and to determine their nature and main spectral characteristics. Methods. An observational campaign was carried out on the putative counterparts of 13 1FHL sources using medium-resolution optical spectroscopy from the Osservatorio Astronomico di Bologna in Loiano, Italy; the Telescopio Nazionale Galileo and the Nordic Optical Telescope, both in the Canary Islands, Spain; and the Observatorio Astronómico Nacional San Pedro Mártir in Baja California, Mexico. Results. We were able to classify 14 new objects based on their continuum shapes and spectral features. Conclusions. Twelve new blazars were found, along with one new quasar and one new narrow line Seyfert 1 (NLS1) to be potentially associated with the 1FHL sources of our sample. Redshifts or lower limits were obtained when possible alongside central black hole mass and luminosity estimates for the NLS1 and the quasar.Fil: Marchesini, Ezequiel Joaquín. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; ArgentinaFil: Masetti, Nicola. Istituto di Astrofisica Spaziale e Fisica Cosmica di Bologna; ItaliaFil: Chavushyan, V.. Instituto Nacional de Astrofísica, Óptica y Electrónica; MéxicoFil: Cellone, Sergio Aldo. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; ArgentinaFil: Andruchow, Ileana. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; ArgentinaFil: Bassani, L.. Istituto di Astrofisica Spaziale e Fisica Cosmica di Bologna; ItaliaFil: Bazzano, A.. Istituto di Astrofisica e Planetologia Spaziali; ItaliaFil: Jiménez-Bailón, E.. Universidad Nacional Autónoma de México; MéxicoFil: Landi, R.. Istituto di Astrofisica Spaziale e Fisica Cosmica di Bologna; ItaliaFil: Malizia, A.. Istituto di Astrofisica Spaziale e Fisica Cosmica di Bologna; ItaliaFil: Palazzi, E.. Istituto di Astrofisica Spaziale e Fisica Cosmica di Bologna; ItaliaFil: Patiño Álvarez, V.. Instituto Nacional de Astrofísica, Óptica y Electrónica; MéxicoFil: Rodríguez Castillo, G. A.. Osservatorio Astronomico di Roma; ItaliaFil: Stephen, J. B.. Istituto di Astrofisica Spaziale e Fisica Cosmica di Bologna; ItaliaFil: Ubertini, P.. Istituto di Astrofisica e Planetologia Spaziali; ItaliaEDP Sciences2016-11info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/37791Marchesini, Ezequiel Joaquín; Masetti, Nicola; Chavushyan, V.; Cellone, Sergio Aldo; Andruchow, Ileana; et al.; Looking for blazars in a sample of unidentified high-energy emitting Fermi sources; EDP Sciences; Astronomy and Astrophysics; 596; A10; 11-2016; 10-180004-6361CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/201629028info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/abs/2016/12/aa29028-16/aa29028-16.htmlinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:01:14Zoai:ri.conicet.gov.ar:11336/37791instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 10:01:14.376CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Looking for blazars in a sample of unidentified high-energy emitting Fermi sources
title Looking for blazars in a sample of unidentified high-energy emitting Fermi sources
spellingShingle Looking for blazars in a sample of unidentified high-energy emitting Fermi sources
Marchesini, Ezequiel Joaquín
Gamma rays
X rays
Active galaxies
BL Lacertae objects
title_short Looking for blazars in a sample of unidentified high-energy emitting Fermi sources
title_full Looking for blazars in a sample of unidentified high-energy emitting Fermi sources
title_fullStr Looking for blazars in a sample of unidentified high-energy emitting Fermi sources
title_full_unstemmed Looking for blazars in a sample of unidentified high-energy emitting Fermi sources
title_sort Looking for blazars in a sample of unidentified high-energy emitting Fermi sources
dc.creator.none.fl_str_mv Marchesini, Ezequiel Joaquín
Masetti, Nicola
Chavushyan, V.
Cellone, Sergio Aldo
Andruchow, Ileana
Bassani, L.
Bazzano, A.
Jiménez-Bailón, E.
Landi, R.
Malizia, A.
Palazzi, E.
Patiño Álvarez, V.
Rodríguez Castillo, G. A.
Stephen, J. B.
Ubertini, P.
author Marchesini, Ezequiel Joaquín
author_facet Marchesini, Ezequiel Joaquín
Masetti, Nicola
Chavushyan, V.
Cellone, Sergio Aldo
Andruchow, Ileana
Bassani, L.
Bazzano, A.
Jiménez-Bailón, E.
Landi, R.
Malizia, A.
Palazzi, E.
Patiño Álvarez, V.
Rodríguez Castillo, G. A.
Stephen, J. B.
Ubertini, P.
author_role author
author2 Masetti, Nicola
Chavushyan, V.
Cellone, Sergio Aldo
Andruchow, Ileana
Bassani, L.
Bazzano, A.
Jiménez-Bailón, E.
Landi, R.
Malizia, A.
Palazzi, E.
Patiño Álvarez, V.
Rodríguez Castillo, G. A.
Stephen, J. B.
Ubertini, P.
author2_role author
author
author
author
author
author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Gamma rays
X rays
Active galaxies
BL Lacertae objects
topic Gamma rays
X rays
Active galaxies
BL Lacertae objects
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Context. Based on their overwhelming dominance among associated Fermi γ-ray catalogue sources, it is expected that a large fraction of the unidentified Fermi objects are blazars. Through crossmatching between the positions of unidentified γ-ray sources from the First Fermi Catalog of γ-ray sources emitting above 10 GeV (1FHL) and the ROSAT and Swift/XRT catalogues of X-ray objects and between pointed XRT observations, a sample of 36 potential associations was found in previous works with less than 15 arcsec of positional offset. One-third of them have recently been classified; the remainder, though believed to belong to the blazar class, still lack spectroscopic classifications. Aims. We study the optical spectrum of the putative counterparts of these unidentified gamma-ray sources in order to find their redshifts and to determine their nature and main spectral characteristics. Methods. An observational campaign was carried out on the putative counterparts of 13 1FHL sources using medium-resolution optical spectroscopy from the Osservatorio Astronomico di Bologna in Loiano, Italy; the Telescopio Nazionale Galileo and the Nordic Optical Telescope, both in the Canary Islands, Spain; and the Observatorio Astronómico Nacional San Pedro Mártir in Baja California, Mexico. Results. We were able to classify 14 new objects based on their continuum shapes and spectral features. Conclusions. Twelve new blazars were found, along with one new quasar and one new narrow line Seyfert 1 (NLS1) to be potentially associated with the 1FHL sources of our sample. Redshifts or lower limits were obtained when possible alongside central black hole mass and luminosity estimates for the NLS1 and the quasar.
Fil: Marchesini, Ezequiel Joaquín. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina
Fil: Masetti, Nicola. Istituto di Astrofisica Spaziale e Fisica Cosmica di Bologna; Italia
Fil: Chavushyan, V.. Instituto Nacional de Astrofísica, Óptica y Electrónica; México
Fil: Cellone, Sergio Aldo. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina
Fil: Andruchow, Ileana. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina
Fil: Bassani, L.. Istituto di Astrofisica Spaziale e Fisica Cosmica di Bologna; Italia
Fil: Bazzano, A.. Istituto di Astrofisica e Planetologia Spaziali; Italia
Fil: Jiménez-Bailón, E.. Universidad Nacional Autónoma de México; México
Fil: Landi, R.. Istituto di Astrofisica Spaziale e Fisica Cosmica di Bologna; Italia
Fil: Malizia, A.. Istituto di Astrofisica Spaziale e Fisica Cosmica di Bologna; Italia
Fil: Palazzi, E.. Istituto di Astrofisica Spaziale e Fisica Cosmica di Bologna; Italia
Fil: Patiño Álvarez, V.. Instituto Nacional de Astrofísica, Óptica y Electrónica; México
Fil: Rodríguez Castillo, G. A.. Osservatorio Astronomico di Roma; Italia
Fil: Stephen, J. B.. Istituto di Astrofisica Spaziale e Fisica Cosmica di Bologna; Italia
Fil: Ubertini, P.. Istituto di Astrofisica e Planetologia Spaziali; Italia
description Context. Based on their overwhelming dominance among associated Fermi γ-ray catalogue sources, it is expected that a large fraction of the unidentified Fermi objects are blazars. Through crossmatching between the positions of unidentified γ-ray sources from the First Fermi Catalog of γ-ray sources emitting above 10 GeV (1FHL) and the ROSAT and Swift/XRT catalogues of X-ray objects and between pointed XRT observations, a sample of 36 potential associations was found in previous works with less than 15 arcsec of positional offset. One-third of them have recently been classified; the remainder, though believed to belong to the blazar class, still lack spectroscopic classifications. Aims. We study the optical spectrum of the putative counterparts of these unidentified gamma-ray sources in order to find their redshifts and to determine their nature and main spectral characteristics. Methods. An observational campaign was carried out on the putative counterparts of 13 1FHL sources using medium-resolution optical spectroscopy from the Osservatorio Astronomico di Bologna in Loiano, Italy; the Telescopio Nazionale Galileo and the Nordic Optical Telescope, both in the Canary Islands, Spain; and the Observatorio Astronómico Nacional San Pedro Mártir in Baja California, Mexico. Results. We were able to classify 14 new objects based on their continuum shapes and spectral features. Conclusions. Twelve new blazars were found, along with one new quasar and one new narrow line Seyfert 1 (NLS1) to be potentially associated with the 1FHL sources of our sample. Redshifts or lower limits were obtained when possible alongside central black hole mass and luminosity estimates for the NLS1 and the quasar.
publishDate 2016
dc.date.none.fl_str_mv 2016-11
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/37791
Marchesini, Ezequiel Joaquín; Masetti, Nicola; Chavushyan, V.; Cellone, Sergio Aldo; Andruchow, Ileana; et al.; Looking for blazars in a sample of unidentified high-energy emitting Fermi sources; EDP Sciences; Astronomy and Astrophysics; 596; A10; 11-2016; 10-18
0004-6361
CONICET Digital
CONICET
url http://hdl.handle.net/11336/37791
identifier_str_mv Marchesini, Ezequiel Joaquín; Masetti, Nicola; Chavushyan, V.; Cellone, Sergio Aldo; Andruchow, Ileana; et al.; Looking for blazars in a sample of unidentified high-energy emitting Fermi sources; EDP Sciences; Astronomy and Astrophysics; 596; A10; 11-2016; 10-18
0004-6361
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/201629028
info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/abs/2016/12/aa29028-16/aa29028-16.html
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv EDP Sciences
publisher.none.fl_str_mv EDP Sciences
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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