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23 April 2024 |
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The nature of fifty Palermo Swift-BAT hard X-ray objects through optical spectroscopy | | A.F. Rojas
; N. Masetti
; D. Minniti
; E. Jiménez-Bailón
; V. Chavushyan
; G. Hau
; V.A. McBride
; L. Bassani
; A. Bazzano
; A.J. Bird
; G. Galaz
; I. Gavignaud
; R. Landi
; A. Malizia
; L. Morelli
; E. Palazzi
; V. Patiño-Álvarez
; J.B. Stephen
; P. Ubertini
; | | Date: |
6 Feb 2017 | | Abstract: | 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 Swift-BAT 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. | | Source: | arXiv, 1702.1629 | | Services: | Forum | Review | PDF | Favorites | |
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