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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/30309
DC FieldValueLanguage
dc.contributor.authorPAIANO, Simonaen_US
dc.contributor.authorLANDONI, Marcoen_US
dc.contributor.authorFALOMO, Renatoen_US
dc.contributor.authorTreves, Aldoen_US
dc.contributor.authorScarpa, Riccardoen_US
dc.contributor.authorRighi, Chiaraen_US
dc.date.accessioned2021-02-10T17:09:04Z-
dc.date.available2021-02-10T17:09:04Z-
dc.date.issued2017en_US
dc.identifier.issn0004-637Xen_US
dc.identifier.urihttp://hdl.handle.net/20.500.12386/30309-
dc.description.abstractWe report results of a spectroscopic campaign carried out at the 10 m Gran Telescopio Canarias for a sample of 22 BL Lac objects detected (or candidates) at TeV energies, aiming to determine or constrain their redshift. This is of fundamental importance for the interpretation of their emission models and for population studies and is also mandatory for studying the interaction of high-energy photons with the extragalactic background light using TeV sources. Optical spectra with high signal-to-noise ratios in the range 4250-10000 Å were obtained to search for faint emission or absorption lines from both the host galaxy and the nucleus. We determine a new redshift for PKS 1424+240 (z = 0.604) and a tentative one for 1ES 0033+595 (z = 0.467). We are able to set new spectroscopic redshift lower limits for three other sources on the basis of Mg II and Ca II intervening absorption features: BZB J1243+3627 (z > 0.483), BZB J1540+8155 (z > 0.672), and BZB 0J2323+4210 (z > 0.267). We confirm previous redshift estimates for four blazars: S3 0218+357 (z = 0.944), 1ES 1215+303 (z = 0.129), W Comae (z = 0.102), and MS 1221.8+2452 (z = 0.218). For the remaining targets, in seven cases (S2 0109+22, 3C 66A, VER J0521+211, S4 0954+65, BZB J1120+4214, S3 1227+25, BZB J2323+4210), we do not validate the proposed redshift. Finally, for all sources of still-unknown redshift, we set a lower limit based on the minimum equivalent width of absorption features expected from the host galaxy.en_US
dc.language.isoengen_US
dc.titleOn the Redshift of TeV BL Lac Objectsen_US
dc.typeArticle-
dc.identifier.doi10.3847/1538-4357/837/2/144en_US
dc.identifier.scopus2-s2.0-85015860598en_US
dc.identifier.isi000398682900011en_US
dc.identifier.urlhttps://iopscience.iop.org/article/10.3847/1538-4357/837/2/144en_US
dc.relation.mediumSTAMPAen_US
dc.relation.volume837en_US
dc.relation.issue2en_US
dc.relation.firstpage144en_US
dc.type.refereeREF_1en_US
dc.description.internationalsìen_US
dc.contributor.countryITAen_US
dc.contributor.countryESPen_US
dc.relation.scientificsectorFIS/05 - ASTRONOMIA E ASTROFISICAen_US
dc.relation.journalTHE ASTROPHYSICAL JOURNALen_US
dc.type.miur262 Articolo in rivista-
dc.identifier.adsbibcode2017ApJ...837..144Pen_US
dc.description.apcnoen_US
dc.description.oa1 – prodotto con file in versione Open Access (allegare il file al passo  5-Carica)en_US
item.cerifentitytypePublications-
item.fulltextWith Fulltext-
item.openairetypeArticle-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.languageiso639-1en-
item.grantfulltextopen-
crisitem.author.deptIASF Palermo-
crisitem.author.deptO.A. Brera-
crisitem.author.orcid0000-0002-2239-3373-
crisitem.author.orcid0000-0002-1218-9555-
crisitem.journal.journalissn0004-637X-
crisitem.journal.anceE016252-
Appears in Collections:1.01 Articoli in rivista
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