Unveiling the nature of three INTEGRAL sources through optical spectroscopy

Abstract

The results of an optical spectroscopy campaign performed at the Astronomical Observatory of Bologna in Loiano (Italy) on three hard X-ray sources detected by INTEGRAL (IGR J17303-0601, IGR J18027-1455 and IGR J21247+5058) are presented. These data have allowed a determination of the nature for two of them, with IGR J17303-0601 being a low mass X-ray binary in the Galaxy and IGR J18027-1455 a background Type 1 Seyfert galaxy at redshift z = 0.035. IGR J21247+5058, instead, has a quite puzzling spectroscopic appearance, with a broad, redshifted H_alpha complex superimposed onto a `normal' F/G-type Galactic star continuum: these features, together with the spatially coincident extended radio emission, might suggest a chance alignment between a relatively nearby star and a background radio galaxy. These results underline the still non-negligible importance of smaller telescopes in modern astrophysics.

arXiv comment4 pages, 2 figures. Accepted for publication in A&A Letters

References in corpus (8)

• Maps of Dust IR Emission for Use in Estimation of Reddening and CMBR Foregrounds
• The USNO-B Catalog
• A Search for "Dwarf" Seyfert Nuclei. III. Spectroscopic Parameters and Properties of the Host Galaxies
• Hard X-ray Emission From Low Mass X-ray Binaries
• Statistical properties of local active galactic nuclei inferred from the RXTE 3-20 keV all-sky survey
• The dust-enshrouded microquasar candidate AX J1639.0-4642 = IGR J16393-4643
• BATSE Observations of the Piccinotti Sample of AGN
• Serpens X-1 observed by INTEGRAL

Cited by in corpus (46)

• BAT AGN Spectroscopic Survey I: Spectral Measurements, Derived Quantities, and AGN Demographics
• INTEGRAL/IBIS all-sky survey in hard X-rays
• Hard X-ray luminosity function and absorption distribution of nearby AGN: INTEGRAL all-sky survey
• Unveiling the nature of INTEGRAL objects through optical spectroscopy. V. Identification and properties of 21 southern hard X-ray sources
• INTEGRAL insight into the inner parts of the Galaxy. High mass X-ray binaries
• Unveiling the nature of INTEGRAL objects through optical spectroscopy. VI. A multi-observatory identification campaign
• INTEGRAL/IBIS nine-year Galactic Hard X-Ray Survey
• The First INTEGRAL AGN Catalog
• INTEGRAL/IBIS 7-year All-Sky Hard X-Ray Survey. Part II: Catalog of Sources
• Unveiling the nature of INTEGRAL objects through optical spectroscopy. VII. Identification of 20 Galactic and extragalactic hard X-ray sources
• Unveiling the nature of INTEGRAL objects through optical spectroscopy. VIII. Identification of 44 newly detected hard X-ray sources
• First high energy observations of Narrow Line Seyfert 1s with INTEGRAL/IBIS
• Unveiling the nature of INTEGRAL objects through optical spectroscopy. III. Observations of seven southern sources
• Unveiling the nature of INTEGRAL objects through optical spectroscopy. X. A new multi-year, multi-observatory campaign
• Cataclysmic variables from a ROSAT/2MASS selection I: Four new intermediate polars
• The Hard X-ray 20-40 keV AGN Luminosity Function
• INTEGRAL/IBIS 17-yr hard X-ray all-sky survey
• Unveiling the nature of INTEGRAL objects through optical spectroscopy. IV. A study of six new hard X-ray sources
• Identification of 8 INTEGRAL hard X-ray sources with Chandra
• The broad-band XMM-Newton and INTEGRAL spectra of bright type 1 Seyfert galaxies
• Hard X-ray Variability of AGN
• Unveiling the nature of INTEGRAL objects through optical spectroscopy. II. The nature of four unidentified sources
• Using the ROSAT Bright Source Catalogue to find Counterparts for IBIS/ISGRI Survey Sources
• The AGN nature of 11 out of 12 Swift/RXTE unidentified sources through optical and X-ray spectroscopy
• 1RXSJ173021.5-055933: a cataclysmic variable with a fast-spinning magnetic white dwarf
• INTEGRAL observations of AGN in the Galactic Plane
• Accretion Properties of A Sample of Hard X-ray (<60keV) Selected Seyfert 1 Galaxies
• Accurate classification of 75 counterparts of objects detected in the 54 month Palermo Swift/BAT hard X-ray catalogue
• Accurate classification of 29 objects detected in the 39 months Palermo Swift/BAT hard X-ray catalogue
• The nature of fifty Palermo Swift-BAT hard X-ray objects through optical spectroscopy
• The Galactic LMXB Population and the Galactic Centre Region
• INTEGRAL observations of AGN obscured by the Galactic Plane
• Accurate classification of 17 AGNs detected with Swift/BAT
• The potential of INTEGRAL for the detection of high redshift GRBs
• Suzaku X-Ray Study of an Anomalous Source XSS J12270-4859
• Suzaku Observation of the Brightest Broad-Line Radio Galaxy 4C 50.55 (IGR J 21247+5058)
• GMRT observations of the field of INTEGRAL X-ray sources- I
• Coronal temperatures of the AGN ESO 103-035 and IGR 2124.7+5058 from NuSTAR observations
• Broadband X-ray spectrum of the newly discovered broad line radio galaxy IGR J21247+5058
• Stellar population properties for a sample of hard X-ray AGNs
• An X-ray view of the INTEGRAL/IBIS blazars
• GMRT observations of the field of INTEGRAL X-ray sources- II (newly discovered hard X-ray sources)
• A sharper view of the outer Galaxy at 1420 and 408 MHz from the Canadian Galactic Plane Survey - I. Revisiting the KR catalogue and new Gigahertz Peaked Spectrum Sources
• INTEGRAL and Swift/XRT observations of IGR J19405-3016
• Unveiling the nature of INTEGRAL sources through optical spectroscopy
• Multi-wavelength properties of the high-energy bright Seyfert 1 galaxy IGR J18027-1455