Accurate classification of 75 counterparts of objects detected in the 54-month Palermo Swift/BAT hard X-ray catalogue

P. Parisi, N. Masetti, A. F. Rojas, E. Jiménez-Bailón, V. Chavushyan, E. Palazzi, L. Bassani, A. Bazzano, A. J. Bird, G. Galaz, D. Minniti, L. Morelli, P. Ubertini

Resultado de la investigación: Article

12 Citas (Scopus)

Resumen

Through an optical campaign performed at four telescopes located in the northern and southern hemispheres, we have obtained optical spectroscopy for 75 counterparts of unclassified or poorly studied hard X-ray emitting objects detected with Swift/BAT and listed in the 54-month Palermo BAT catalogue. All these objects also have observations taken with the Swift/XRT, ROSAT, or Chandra satellites, which allowed us to reduce the high-energy error box and pinpoint the most likely optical counterpart(s). We found that 69 sources in our sample are active galactic nuclei (AGNs) of which, 35 are classified as type 1 (with broad and narrow emission lines), 33 are classified as type 2 (with only narrow emission lines), and one is a high-redshift quasi-stellar object; the remaining 6 objects are galactic cataclysmic variables. Of the type 1 AGNs, 32 are objects of intermediate Seyfert type (1.2-1.9) and one is narrow-line Seyfert 1 galaxy; for 29 of the 35 type 1 AGNs, we have been able to estimate the central black hole mass and the Eddington ratio. Of the type 2 AGNs, two display optical features typical of the low-ionization nuclear emission-line region class, three are classified as transition objects, one is a starburst galaxy, and two are X-ray bright, optically normal galaxies. All galaxies classified in this work are relatively nearby objects (0.006-0.213) except for one at redshift 1.137.

Idioma originalEnglish
Número de artículoA67
PublicaciónAstronomy and Astrophysics
Volumen561
DOI
EstadoPublished - ene 2014

Huella dactilar

active galactic nuclei
catalogs
galaxies
x rays
Southern Hemisphere
cataclysmic variables
starburst galaxies
Northern Hemisphere
ionization
spectroscopy
boxes
telescopes
energy
estimates

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Citar esto

Parisi, P., Masetti, N., Rojas, A. F., Jiménez-Bailón, E., Chavushyan, V., Palazzi, E., ... Ubertini, P. (2014). Accurate classification of 75 counterparts of objects detected in the 54-month Palermo Swift/BAT hard X-ray catalogue. Astronomy and Astrophysics, 561, [A67]. https://doi.org/10.1051/0004-6361/201322409
Parisi, P. ; Masetti, N. ; Rojas, A. F. ; Jiménez-Bailón, E. ; Chavushyan, V. ; Palazzi, E. ; Bassani, L. ; Bazzano, A. ; Bird, A. J. ; Galaz, G. ; Minniti, D. ; Morelli, L. ; Ubertini, P. / Accurate classification of 75 counterparts of objects detected in the 54-month Palermo Swift/BAT hard X-ray catalogue. En: Astronomy and Astrophysics. 2014 ; Vol. 561.
@article{c0cf2600241242578f1510105e0031c3,
title = "Accurate classification of 75 counterparts of objects detected in the 54-month Palermo Swift/BAT hard X-ray catalogue",
abstract = "Through an optical campaign performed at four telescopes located in the northern and southern hemispheres, we have obtained optical spectroscopy for 75 counterparts of unclassified or poorly studied hard X-ray emitting objects detected with Swift/BAT and listed in the 54-month Palermo BAT catalogue. All these objects also have observations taken with the Swift/XRT, ROSAT, or Chandra satellites, which allowed us to reduce the high-energy error box and pinpoint the most likely optical counterpart(s). We found that 69 sources in our sample are active galactic nuclei (AGNs) of which, 35 are classified as type 1 (with broad and narrow emission lines), 33 are classified as type 2 (with only narrow emission lines), and one is a high-redshift quasi-stellar object; the remaining 6 objects are galactic cataclysmic variables. Of the type 1 AGNs, 32 are objects of intermediate Seyfert type (1.2-1.9) and one is narrow-line Seyfert 1 galaxy; for 29 of the 35 type 1 AGNs, we have been able to estimate the central black hole mass and the Eddington ratio. Of the type 2 AGNs, two display optical features typical of the low-ionization nuclear emission-line region class, three are classified as transition objects, one is a starburst galaxy, and two are X-ray bright, optically normal galaxies. All galaxies classified in this work are relatively nearby objects (0.006-0.213) except for one at redshift 1.137.",
keywords = "Instrumentation: spectrographs, Line: identification, Methods: data analysis, Techniques: spectroscopic",
author = "P. Parisi and N. Masetti and Rojas, {A. F.} and E. Jim{\'e}nez-Bail{\'o}n and V. Chavushyan and E. Palazzi and L. Bassani and A. Bazzano and Bird, {A. J.} and G. Galaz and D. Minniti and L. Morelli and P. Ubertini",
year = "2014",
month = "1",
doi = "10.1051/0004-6361/201322409",
language = "English",
volume = "561",
journal = "Astronomy and Astrophysics",
issn = "0004-6361",
publisher = "EDP Sciences",

}

Parisi, P, Masetti, N, Rojas, AF, Jiménez-Bailón, E, Chavushyan, V, Palazzi, E, Bassani, L, Bazzano, A, Bird, AJ, Galaz, G, Minniti, D, Morelli, L & Ubertini, P 2014, 'Accurate classification of 75 counterparts of objects detected in the 54-month Palermo Swift/BAT hard X-ray catalogue', Astronomy and Astrophysics, vol. 561, A67. https://doi.org/10.1051/0004-6361/201322409

Accurate classification of 75 counterparts of objects detected in the 54-month Palermo Swift/BAT hard X-ray catalogue. / Parisi, P.; Masetti, N.; Rojas, A. F.; Jiménez-Bailón, E.; Chavushyan, V.; Palazzi, E.; Bassani, L.; Bazzano, A.; Bird, A. J.; Galaz, G.; Minniti, D.; Morelli, L.; Ubertini, P.

En: Astronomy and Astrophysics, Vol. 561, A67, 01.2014.

Resultado de la investigación: Article

TY - JOUR

T1 - Accurate classification of 75 counterparts of objects detected in the 54-month Palermo Swift/BAT hard X-ray catalogue

AU - Parisi, P.

AU - Masetti, N.

AU - Rojas, A. F.

AU - Jiménez-Bailón, E.

AU - Chavushyan, V.

AU - Palazzi, E.

AU - Bassani, L.

AU - Bazzano, A.

AU - Bird, A. J.

AU - Galaz, G.

AU - Minniti, D.

AU - Morelli, L.

AU - Ubertini, P.

PY - 2014/1

Y1 - 2014/1

N2 - Through an optical campaign performed at four telescopes located in the northern and southern hemispheres, we have obtained optical spectroscopy for 75 counterparts of unclassified or poorly studied hard X-ray emitting objects detected with Swift/BAT and listed in the 54-month Palermo BAT catalogue. All these objects also have observations taken with the Swift/XRT, ROSAT, or Chandra satellites, which allowed us to reduce the high-energy error box and pinpoint the most likely optical counterpart(s). We found that 69 sources in our sample are active galactic nuclei (AGNs) of which, 35 are classified as type 1 (with broad and narrow emission lines), 33 are classified as type 2 (with only narrow emission lines), and one is a high-redshift quasi-stellar object; the remaining 6 objects are galactic cataclysmic variables. Of the type 1 AGNs, 32 are objects of intermediate Seyfert type (1.2-1.9) and one is narrow-line Seyfert 1 galaxy; for 29 of the 35 type 1 AGNs, we have been able to estimate the central black hole mass and the Eddington ratio. Of the type 2 AGNs, two display optical features typical of the low-ionization nuclear emission-line region class, three are classified as transition objects, one is a starburst galaxy, and two are X-ray bright, optically normal galaxies. All galaxies classified in this work are relatively nearby objects (0.006-0.213) except for one at redshift 1.137.

AB - Through an optical campaign performed at four telescopes located in the northern and southern hemispheres, we have obtained optical spectroscopy for 75 counterparts of unclassified or poorly studied hard X-ray emitting objects detected with Swift/BAT and listed in the 54-month Palermo BAT catalogue. All these objects also have observations taken with the Swift/XRT, ROSAT, or Chandra satellites, which allowed us to reduce the high-energy error box and pinpoint the most likely optical counterpart(s). We found that 69 sources in our sample are active galactic nuclei (AGNs) of which, 35 are classified as type 1 (with broad and narrow emission lines), 33 are classified as type 2 (with only narrow emission lines), and one is a high-redshift quasi-stellar object; the remaining 6 objects are galactic cataclysmic variables. Of the type 1 AGNs, 32 are objects of intermediate Seyfert type (1.2-1.9) and one is narrow-line Seyfert 1 galaxy; for 29 of the 35 type 1 AGNs, we have been able to estimate the central black hole mass and the Eddington ratio. Of the type 2 AGNs, two display optical features typical of the low-ionization nuclear emission-line region class, three are classified as transition objects, one is a starburst galaxy, and two are X-ray bright, optically normal galaxies. All galaxies classified in this work are relatively nearby objects (0.006-0.213) except for one at redshift 1.137.

KW - Instrumentation: spectrographs

KW - Line: identification

KW - Methods: data analysis

KW - Techniques: spectroscopic

UR - http://www.scopus.com/inward/record.url?scp=84891667907&partnerID=8YFLogxK

U2 - 10.1051/0004-6361/201322409

DO - 10.1051/0004-6361/201322409

M3 - Article

AN - SCOPUS:84891667907

VL - 561

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

SN - 0004-6361

M1 - A67

ER -