The nature of 50 Palermo Swift -BAT hard X-ray objects through optical spectroscopy

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dc.contributor.authorRojas, A F
dc.contributor.authorMasetti, N
dc.contributor.authorMinniti, D
dc.contributor.authorJiménez-Bailón, E
dc.contributor.authorChavushyan, V
dc.contributor.authorHau, G
dc.contributor.authorMcBride, V A
dc.contributor.authorBassani, L
dc.contributor.authorBazzano, A
dc.contributor.authorBird, A J
dc.contributor.authorGalaz, G
dc.contributor.authorGavignaud, I
dc.contributor.authorLandi, R
dc.contributor.authorMalizia, A
dc.contributor.authorMorelli, L
dc.contributor.authorPalazzi, E
dc.contributor.authorPatiño-Álvarez, V
dc.contributor.authorStephen, J B
dc.contributor.authorUbertini, P
dc.date.accessioned2021-10-08T06:20:11Z
dc.date.available2021-10-08T06:20:11Z
dc.date.issued2017
dc.description.abstractWe present the nature of 50 hard X-ray emitting objects unveiled through an optical spectroscopy campaign performed at seven telescopes in the northern and southern hemispheres. These objects were detected with the Burst Alert Telescope (BAT) instrument onboard the Swift satellite and listed as of unidentified nature in the 54-month Palermo BAT catalogue. In detail, 45 sources in our sample are identified as active galactic nuclei of which, 27 are classified as type 1 (with broad and narrow emission lines) and 18 are classified as type 2 (with only narrow emission lines). Among the broad-line emission objects, one is a type 1 high-redshift quasi-stellar object, and among the narrow-line emission objects, one is a starburst galaxy, one is a X-ray bright optically normal galaxy, and one is a low ionization nuclear emission line region. We report 30 new redshift measurements, 13 confirmations and 2 more accurate redshift values. The remaining five objects are galactic sources: three are Cataclismic Variables, one is a X-ray Binary probably with a low mass secondary star, and one is an active star.
dc.identifier.apacitationRojas, A. F., Masetti, N., Minniti, D., Jiménez-Bailón, E., Chavushyan, V., Hau, G., ... Ubertini, P. (2017). The nature of 50 Palermo Swift -BAT hard X-ray objects through optical spectroscopy. <i>Astronomy and Astrophysics</i>, 602(4), A124 - 177. http://hdl.handle.net/11427/34217en_ZA
dc.identifier.chicagocitationRojas, A F, N Masetti, D Minniti, E Jiménez-Bailón, V Chavushyan, G Hau, V A McBride, et al "The nature of 50 Palermo Swift -BAT hard X-ray objects through optical spectroscopy." <i>Astronomy and Astrophysics</i> 602, 4. (2017): A124 - 177. http://hdl.handle.net/11427/34217en_ZA
dc.identifier.citationRojas, A.F., Masetti, N., Minniti, D., Jiménez-Bailón, E., Chavushyan, V., Hau, G., McBride, V.A. & Bassani, L. et al. 2017. The nature of 50 Palermo Swift -BAT hard X-ray objects through optical spectroscopy. <i>Astronomy and Astrophysics.</i> 602(4):A124 - 177. http://hdl.handle.net/11427/34217en_ZA
dc.identifier.issn0004-6361
dc.identifier.issn1432-0746
dc.identifier.ris TY - Journal Article AU - Rojas, A F AU - Masetti, N AU - Minniti, D AU - Jiménez-Bailón, E AU - Chavushyan, V AU - Hau, G AU - McBride, V A AU - Bassani, L AU - Bazzano, A AU - Bird, A J AU - Galaz, G AU - Gavignaud, I AU - Landi, R AU - Malizia, A AU - Morelli, L AU - Palazzi, E AU - Patiño-Álvarez, V AU - Stephen, J B AU - Ubertini, P AB - We present the nature of 50 hard X-ray emitting objects unveiled through an optical spectroscopy campaign performed at seven telescopes in the northern and southern hemispheres. These objects were detected with the Burst Alert Telescope (BAT) instrument onboard the Swift satellite and listed as of unidentified nature in the 54-month Palermo BAT catalogue. In detail, 45 sources in our sample are identified as active galactic nuclei of which, 27 are classified as type 1 (with broad and narrow emission lines) and 18 are classified as type 2 (with only narrow emission lines). Among the broad-line emission objects, one is a type 1 high-redshift quasi-stellar object, and among the narrow-line emission objects, one is a starburst galaxy, one is a X-ray bright optically normal galaxy, and one is a low ionization nuclear emission line region. We report 30 new redshift measurements, 13 confirmations and 2 more accurate redshift values. The remaining five objects are galactic sources: three are Cataclismic Variables, one is a X-ray Binary probably with a low mass secondary star, and one is an active star. DA - 2017 DB - OpenUCT DP - University of Cape Town IS - 4 J1 - Astronomy and Astrophysics LK - https://open.uct.ac.za PY - 2017 SM - 0004-6361 SM - 1432-0746 T1 - The nature of 50 Palermo Swift -BAT hard X-ray objects through optical spectroscopy TI - The nature of 50 Palermo Swift -BAT hard X-ray objects through optical spectroscopy UR - http://hdl.handle.net/11427/34217 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/34217
dc.identifier.vancouvercitationRojas AF, Masetti N, Minniti D, Jiménez-Bailón E, Chavushyan V, Hau G, et al. The nature of 50 Palermo Swift -BAT hard X-ray objects through optical spectroscopy. Astronomy and Astrophysics. 2017;602(4):A124 - 177. http://hdl.handle.net/11427/34217.en_ZA
dc.language.isoeng
dc.publisher.departmentDepartment of Astronomy
dc.publisher.facultyFaculty of Science
dc.sourceAstronomy and Astrophysics
dc.source.journalissue4
dc.source.journalvolume602
dc.source.paginationA124 - 177
dc.source.urihttps://dx.doi.org/10.1051/0004-6361/201629463
dc.subject.othergalaxies: Seyfert
dc.subject.otherquasars: emission lines
dc.subject.otherX-rays: binaries
dc.subject.othernovae, cataclysmic variables
dc.subject.othertechniques: spectroscopic
dc.subject.othernovae
dc.subject.othercataclysmic variables
dc.titleThe nature of 50 Palermo Swift -BAT hard X-ray objects through optical spectroscopy
dc.typeJournal Article
uct.type.publicationResearch
uct.type.resourceJournal Article
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