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Authors whose works are in public domain in at least one jurisdiction

List of works by Giuseppe Perola

1-50 of 149 results

The HELLAS2XMM survey

The HELLAS2XMM survey

scientific article

BeppoSAX, the wide band mission for X-ray astronomy

scholarly article published 1997

The BeppoSAX High Energy Large Area Survey (HELLAS) -- II. Number counts and X-ray spectral properties

scientific article

The HELLAS2XMM Survey. VII. The Hard X‐Ray Luminosity Function of AGNs up toz= 4: More Absorbed AGNs at Low Luminosities and High Redshifts

scientific article published in the Astrophysical Journal

The HELLAS2XMM survey. VI. X-ray absorption in the 1df AGN sample through a spectral analysis

scientific article

The HELLAS2XMM survey. V. Near-Infrared observations of X-ray sources with extreme X/O ratios

scholarly article

TheBeppoSAXHigh‐Energy Large‐Area Survey. V. The Nature of the Hard X‐Ray Source Population and Its Evolution

scientific article published in the Astrophysical Journal

The HELLAS2XMM survey. III. Multiwavelength observations of hard X-ray selected sources in the PKS 0312-77 field

scholarly article

A Westerbork survey of rich clusters of galaxies. III. Observations of the Coma cluster at 610 MHz

scientific article published in January 1976

Discovery of a Redshifted Iron K Line in the X-Ray Afterglow of GRB 000214

scientific article published in the Astrophysical Journal

Spectroscopic identification of ten faint hard X-ray sources discovered by Chandra

Compton reflection and iron fluorescence in BeppoSAX observations of Seyfert type 1 galaxies

scientific article published in Astronomy and Astrophysics

The HELLAS2XMMSurvey. II. Multiwavelength Observations of P3: An X‐Ray–bright, Optically Inactive Galaxy

scientific article published in the Astrophysical Journal

A swan song: the disappearance of the nucleus of NGC 4051 and the echo of its past glory

scientific article

The BeppoSAX High Energy Large Area Survey (HELLAS) -- III. Testing synthesis models for the X-ray background

article

The X-Ray Afterglow of the Gamma-Ray Burst of 1997 May 8:Spectral Variability and Possible Evidence of an Iron Line

scientific article published in the Astrophysical Journal

The Phoenix galaxy: UGC 4203 re-birth from its ashes?

scientific article published in Astronomy and Astrophysics

The complex iron line of NGC 5506

scientific article published in Astronomy and Astrophysics

Broadband Spectrum of Cygnus X‐1 in Two Spectral States withBeppoSAX

scientific article published in the Astrophysical Journal

New results on the X-ray emission and its correlation with the ultraviolet in NGC 4151

scientific article published in the Astrophysical Journal

X-ray absorption in Seyfert 2 galaxies

scholarly article

BeppoSAXObservation of NGC 7582: Constraints on the X‐Ray Absorber

scientific article published in the Astrophysical Journal

A reflection-dominated X-ray spectrum discovered by ASCA in the Circinus galaxy

scientific article published in January 1996

The HELLAS2XMM survey. IX. Spectroscopic identification of super-EROs hosting AGNs

scientific article

Steps toward determination of the size and structure of the broad-line region in active galatic nuclei. 8: an intensive HST, IUE, and ground-based study of NGC 5548

article

Multiwavelength Observations of Short-Timescale Variability in NGC 4151. IV. Analysis of Multiwavelength Continuum Variability

scientific article published in the Astrophysical Journal

Steps toward determination of the size and structure of the broad-line region in active galactic nuclei. I. An 8-month campaign of monitoring NGC 5548 with IUE

scientific article published in January 1991

Seyfert galaxies as X-ray sources

scientific article

Steps toward Determination of the Size and Structure of the Broad‐Line Region in Active Galactic Nuclei. IX. Ultraviolet Observations of Fairall 9

The European Large‐AreaInfrared Space ObservatorySurvey V: ABeppoSAXHard X‐Ray Survey of the S1 Region

scientific article published in the Astrophysical Journal

The BeppoSAX High Energy Large Area Survey (HELLAS) -- VI. The radio properties

scientific article

X‐Ray Evolution of Active Galactic Nuclei and Hierarchical Galaxy Formation

scientific article published in the Astrophysical Journal

X-ray observations with the Einstein Observatory of emission-line galaxies

scientific article published in 1982

Testing Comptonization Models UsingBeppoSAXObservations of Seyfert 1 Galaxies

scientific article published in the Astrophysical Journal

The broad band spectrum and variability of NGC 4151 observed by BeppoSAX

The iron K-alpha response in an X-ray illuminated relativistic disc and a black hole mass estimate

scholarly article by Matt G. & Perola G. C. published 1992 in Monthly Notices of the Royal Astronomical Society

Steps toward determination of the size and structure of the broad-line region in active galactic nuclei. 6: Variability of NGC 3783 from ground-based data

scientific article published in the Astrophysical Journal

Testing comptonizing coronae on a long BeppoSAX observation of the Seyfert 1 galaxy NGC 5548

scientific article published in January 2000

Detailed observations of NGC 4151 with the IUE -II. Variability of the continuum from 1978 february to 1980 may, including X-ray and optical observations

scientific article published in 1982

Detailed observations of NGC 4151 with the IUE - III. Variability of the strong emission lines from 1978 February to 1980 May

scientific article published in 1984

Iron line signatures in X-ray afterglows of GRB by BeppoSAX

scientific article

Multiwavelength Observations of Short-Timescale Variability in NGC 4151. I. Ultraviolet Observations

scientific article published in the Astrophysical Journal

Detailed observations of NGC 4151 with the IUE. I. Low dispersion data up to 1979 January

scientific article published in January 1981

Steps toward determination of the size and structure of the broad-line region in active galactic nuclei. V. Variability of the ultraviolet continuum and emission lines of NGC 3783

scientific article published in January 1994

A simultaneous XMM-Newton and BeppoSAX observation of the archetypal broad line Seyfert 1 galaxy NGC 5548

scientific article published in January 2003

The origin of the iron lines in NGC 7213

scientific article

BeppoSAX observations of Mrk 841 and Mrk 335

scientific article published in Astronomy and Astrophysics

BeppoSAX observations of the radio galaxy centaurus A

article published in 2000

Broad band spectral properties of Seyfert 1 galaxies observed with BeppoSAX