P. Veron

Observatoire de Haute-Provence , Manosque, Provence-Alpes-Côte d'Azur, France

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Publications (111)230.59 Total impact

  • M. P. Veron-Cetty, P. Veron
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    ABSTRACT: This catalogue is a compilation of all known AGNs presented in a compact and convenient form. It is an update of the previous versions; and as in the previous editions no information about absorption lines of X-ray properties are given, but absolute magnitudes are given, assuming Ho=71km/s/Mpc and q0=0 (notice the change of cosmology: Ho was assumed to be 50km/s/Mpc in the previous editions). When available, the 20cm and 6cm radio flux are given. The present edition of this catalogue contains the quasars with measured redshift known prior to July 1st, 2009. It contains 133336 quasars, 1374 BL Lac objects and 34231 active galaxies (including 15627 Seyfert 1's), almost doubling the number listed in the 12th edition. Lists of known lensed quasars (table2.dat) and double quasars (table3.dat) are also given here. (8 data files).
    VizieR Online Data Catalog. 02/2010;
  • M.-P. Véron-Cetty, P. Véron
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    ABSTRACT: Aims: This catalogue is aimed at presenting a compilation of all known AGN in a compact and convenient form, and we hope that it will be useful to all workers in this field. Methods: Like the twelfth edition, it includes position and redshift, as well as photometry (U, B, V) and 6 cm and 20 cm flux densities, when available. Results: The present version contains 133 336 quasars, 1 374 BL Lac objects, and 34 231 active galaxies (including 16 517 Seyfert 1s), almost doubling the number listed in the 12th edition. We also give a list of all known lensed and double quasars. The catalogue (Table_QSO, Table_BL, Table_AGN and Table_reject) and the list of references are only available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/518/A10 or at the Observatoire de Haute Provence (http://www.obs-hp.fr/catalogues/veron213/veron213.html).
    Astronomy and Astrophysics 01/2010; · 5.08 Impact Factor
  • Joly M, M. Véron Cetty, Véron P
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    ABSTRACT: The optical spectrum of Seyfert 1s reveals a great variety of Fe II emission lines. We give three examples and investigate the formation of these lines in order to determine the physical conditions of the emission regions.
    Revista Mexicana de Astronomía y Astrofísica : Universidad Nacional Autónoma de México. Instituto de Astronomía. 01/2008;
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    ABSTRACT: Twenty six spectra of Mark 110 have been obtained between 1999, November 13 and 2000, May 14 with the Marcario Low Resolution Spectrograph (LRS) attached at the prime focus of the 9.2-m Hobby-Eberly telescope (HET) at McDonald observatory. (1 data file).
    VizieR Online Data Catalog. 11/2007;
  • Source
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    ABSTRACT: Aims.We analyse in detail the rich emission line spectrum of Mark 110 to determine the physical conditions in the nucleus of this object, a peculiar NLS1 without any detectable Fe II emission associated with the broad line region and with a $\lambda$5007/H$\beta$ line ratio unusually large for a NLS1.Methods.We use 24 spectra obtained with the Marcario Low Resolution Spectrograph attached at the prime focus of the 9.2 m Hobby-Eberly telescope at the McDonald observatory. We fitted the spectrum by identifying all the emission lines (about 220) detected in the wavelength range 4200-6900 Å (at rest).Results.The narrow emission lines are probably produced in a region with a density gradient in the range 10$^{3}$-10$^{6}$ cm$^{-3}$ with a rather high column density (5$\times$10$^{21}$ cm$^{-2}$). In addition to a narrow line system, three major broad line systems with different line velocity and width are required. We confirm the absence of broad Fe II emission lines. We speculate that Mark 110 is in fact a BLS1 with relatively “narrow” broad lines but with a BH mass large enough compared to its luminosity to have a lower than Eddington luminosity.
    http://dx.doi.org/10.1051/0004-6361:20078313. 01/2007;
  • M.-P. Veron-Cetty, P. Veron
    VizieR Online Data Catalog. 05/2006; 7248:1.
  • Source
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    ABSTRACT: The narrow-line Seyfert 1 galaxy IRAS 07598+6508 is known to be a stong Fe II emitter. The analysis of several high S/N ratio spectra shows that its spectrum is dominated by a relatively narrow "broad line" region (1 780 km s$^{-1}$ FWHM) emitting not only Fe II, but also Ti II and Cr II lines. Although we were unable to find a completely satisfactory physical model, we got the best agreement with the observations with collisional rather than radiative models, with a high density (n=10$^{15}$ cm$^{-3}$), a high column density (N$_{H}$=10$^{25}$ cm$^{-2}$) and a microturbulence of 100 km s$^{-1}$. This BLR is qualitatively similar to the one observed in I Zw 1. We have not found traces in IRAS 07598+6508 of the narrow line regions found in I Zw 1. Comment: 15 pages, 4 figures, accepted by A&A
    Astronomy and Astrophysics 02/2006; · 5.08 Impact Factor
  • Source
    M.-P. Véron-Cetty, P. Véron
    [show abstract] [hide abstract]
    ABSTRACT: Aims.This catalogue is aimed at presenting a compilation of all known AGN in a compact and convenient form and we hope that it will be useful to all workers in this field.Methods.Like the eleventh edition, it includes position and redshift as well as photometry ($U$, $B$, $V$) and 6 cm flux densities when available. We now give 20 cm rather than 11 cm flux densities.Results.The present version contains 85 221 quasars, 1122 BL Lac objects and 21 737 active galaxies (including 9628 Seyfert 1s), almost doubling the number listed in the 11th edition. We also give a list of all known lensed and double quasars.
    http://dx.doi.org/10.1051/0004-6361:20065177. 01/2006;
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    ABSTRACT: To build a large, optically bright, X-ray selected AGN sample we have correlated the ROSAT-FSC () catalogue of X-ray sources with the USNO () catalogue limited to objects brighter than O=16.5 and then with the APS () database. Each of the 3212 coincidences was classified using the slitless Hamburg spectra. 493 objects were found to be extended and 2719 starlike. Using both the extended objects and the galaxies known from published catalogues we built up a sample of 185 galaxies with O(APS)
    Astronomy and Astrophysics 09/2004; 414:487. · 5.08 Impact Factor
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    ABSTRACT: Fig. 8 represents the synthetic FeII spectrum, derived from I Zw 1, corrected for internal extinction with a Galactic extinction law (Savage & Mathis 1979) and E(B-V)=0.20. template_iwz1.fits is this 1D spectrum, fits format. (1 data file).
    VizieR Online Data Catalog. 02/2004;
  • Source
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    ABSTRACT: Most Seyfert 1 galaxies show strong Fe II lines in their spectrum having the velocity and width of the broad emission lines. To remove the Fe II contribution in these objects, an accurate template is necessary. We used very high signal-to-noise, medium resolution archive optical spectra of I Zw 1 to build such a template. I Zw 1 is a bright narrow-line Seyfert 1 galaxy. As such it is well suited for a detailed analysis of its emission line spectrum. Furthermore it is known to have a very peculiar spectrum with, in addition to the usual broad and narrow line regions, two emission regions emitting broad and blue shifted [O III] lines making it a peculiarly interesting object. While analysing the spectra, we found that the narrow-line region is, unlike the NLR of most Seyfert 1 galaxies, a very low excitation region dominated by both permitted and forbidden Fe II lines. It is very similar to the emission spectrum of a blob in $\eta$ Carinae which is a low temperature ($T_{\rm e}\sim6500$ K), relatively high density ($N_{\rm e}=10^{6}$ cm$^{-3}$) cloud. The Fe II lines in this cloud are mainly due to pumping via the stellar continuum radiation field (Verner et al. [CITE]). We did not succeed in modelling the spectrum of the broad-line region, and we suggest that a non radiative heating mechanism increases the temperature in the excited H I region, thus providing the necessary additional excitation of the Fe II lines. For the low-excitation narrow-line region, we are able to apply boundaries to the physical conditions accounting for the forbidden and permitted Fe II lines (10$^{6}<N_{\rm e}<10^{7}$ cm$^{-3}$; 10$^{-6} <U<10^{-5}$).
    Proceedings of the International Astronomical Union 01/2004;
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    ABSTRACT: To build a large, optically bright, X-ray selected AGN sample we have correlated the ROSAT-FSC () catalogue of X-ray sources with the USNO () catalogue limited to objects brighter than O=16.5 and then with the APS () database. Each of the 3212 coincidences was classified using the slitless Hamburg spectra. 493 objects were found to be extended and 2719 starlike. Using both the extended objects and the galaxies known from published catalogues we built up a sample of 185 galaxies with O(APS)<17.0mag, which are high-probability counterparts of RASS-FSC X-ray sources. 130 galaxies have a redshift from the literature and for another 34 we obtained new spectra. The fraction of Seyfert galaxies in this sample is 20%. To select a corresponding sample of 144 high-probability counterparts among the starlike sources we searched for very blue objects in an APS-based color-magnitude diagram. Forty-one were already known AGN and for another 91 objects we obtained new spectra, yielding 42 new AGN, increasing their number in the sample to 83. This confirms that surveys of bright QSOs are still significantly incomplete. On the other hand we find that, at a flux limit of 0.02ct/s and at this magnitude, only 40% of all QSOs are detected by ROSAT. (3 data files).
    VizieR Online Data Catalog. 01/2004;
  • Source
    [show abstract] [hide abstract]
    ABSTRACT: To build a large, optically bright, X-ray selected AGN sample we have correlated the ROSAT-FSC catalogue of X-ray sources with the USNO catalogue limited to objects brighter than $O=16.5$ and then with the APS database. Each of the 3212 coincidences was classified using the slitless Hamburg spectra. 493 objects were found to be extended and 2719 starlike. Using both the extended objects and the galaxies known from published catalogues we built up a sample of 185 galaxies with $O_{\rm APS}<17.0$ mag, which are high-probability counterparts of RASS-FSC X-ray sources. 130 galaxies have a redshift from the literature and for another 34 we obtained new spectra. The fraction of Seyfert galaxies in this sample is 20%. To select a corresponding sample of 144 high-probability counterparts among the starlike sources we searched for very blue objects in an APS-based color-magnitude diagram. Forty-one were already known AGN and for another 91 objects we obtained new spectra, yielding 42 new AGN, increasing their number in the sample to 83. This confirms that surveys of bright QSOs are still significantly incomplete. On the other hand we find that, at a flux limit of 0.02 count s$^{-1}$ and at this magnitude, only 40% of all QSOs are detected by ROSAT.
    Astronomy and Astrophysics 01/2004; 414:487. · 5.08 Impact Factor
  • M.-P. Véron-Cetty, P. Véron
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    ABSTRACT: The recent release of the final installement of the 2dF quasar catalogue and of the first part of the Sloan catalogue, almost doubling the number of known QSOs, led us to prepare an updated version of our Catalogue of quasars and active nuclei which now contains 48 921 quasars, 876 BL Lac objects and 15 069 active galaxies (including 11 777 Seyfert 1s). Like the tenth edition, it includes position and redshift as well as photometry ($U$, $B$, $V$) and 6 and 11 cm flux densities when available. We also give a list of all known lensed and double quasars.
    Astronomy and Astrophysics 01/2003; · 5.08 Impact Factor
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    ABSTRACT: A few Seyfert 1s have a Hb profile with a red wing usually called the "red shelf". The most popular interpretation of this feature is that it is due to broad redshifted lines of Hb and [OIII]4959,5007; we have observed two Seyfert 1s displaying a "red shelf" and showed that in these two objects the main contributor is most probably the HeI 4922,5016 lines having the velocity and width of the broad Hb component. There is no evidence for the presence of a broad redshifted component of Hb or [OIII] in any of these two objects. Comment: LaTeX file (uses AA vers. 5.1 class, enclosed), 8 pages, 9 figures. Accepted for publication in Astronomy & Astrophysics. Also available at http://www.obs-hp.fr/www/preprints.html
    01/2002;
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    ABSTRACT: We report the discovery of a new bright (V$\sim$12.6) cataclysmic variable star identified with the ROSAT X-ray source RX J1643.7+3402. Spectroscopic and photometric observations show it to be a novalike variable sharing some of the characteristics of the SW Sex sub-class of novalike CVs. The spectroscopic period may be either 2\fh575 or 2\fh885, within the period "gap." A photometric modulation with a probable period of 2\fh595 and an amplitude of $\sim$ 0.1 mag in V is present on most nights and could be either a "positive" or a "negative" superhump modulation (depending on the exact spectroscopic period), indicating the presence of a precessing accretion disk in this system. Rapid variations of 0.1 to 0.2 mag amplitude in V repeat with a time scale of $\sim$ 15 min. Comment: 11 pages, 12 figures, accepted in Astronomy & Astrophysics
    Astronomy and Astrophysics 08/2001; · 5.08 Impact Factor
  • M. P. Veron-Cetty, P. Veron
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    ABSTRACT: This catalogue is an update of the previous versions. The recent publication of the first release of the 2dF quasar survey (Croom et al., 2001MNRAS.322L..29C, see Cat. <VII/223>) containing nearly 10,000 new QSOs, almost doubled the number of known such objects: there are now 23760 (+10546) quasars (defined as brighter than absolute B magnitude -23), 5751 (+1323) AGNs (defined as fainter than absolute B magnitude -23) of which 2765 are Seyfert 1, and 608 (+146) BL Lac objects from 2173 (+119) references. Like the ninth edition, it includes position and redshift as well as photometry (U, B, V) and 6 and 11 cm flux densities when available. The present edition this catalogue contains the quasars with measured redshift known prior to May 1st, 2001. (5 data files).
    VizieR Online Data Catalog. 03/2001; 7224.
  • M.-P. Véron-Cetty, P. Véron
    [show abstract] [hide abstract]
    ABSTRACT: The recent publication of the first release of the 2dF quasar catalogue (Croom et al. [CITE]) containing nearly 10 000 new QSOs, almost doubling the number of known such objects, led us to prepare an updated version of our catalogue of quasars and active nuclei which now contains 23$ $760 quasars, 608 BL Lac objects and 5751 active galaxies (of which 2765 are Seyfert 1s). Like the ninth edition, it includes position and redshift as well as photometry $(U, B, V)$ and 6 and 11 cm flux densities when available. We also give a list of all known lensed and double quasars.
    Astronomy and Astrophysics 01/2001; · 5.08 Impact Factor
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    ABSTRACT: The Second part of the FBS was devoted to search and study of blue stellar objects. Optical identifications have been made for a number of ROSAT sources to find new QSO and Sy candidates. One of the objects, RXS J16437+3402, appeared to be a bright (m = 15.2) and very interesting cataclysmic variable: the Byurakan 2.6 m and OHP 1.93 m observations in 2000 show rapid variations of brightness, colour, and spectral lines. The object is possibly a low-inclination SW Sextantis star.
    Astronomy & Astrophysics - ASTRON ASTROPHYS. 01/2001; 381(3):894-904.
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    ABSTRACT: We have compiled a list of 83 objects classified as Narrow-Line Seyfert 1 galaxies (NLS1s) or known to have a broad Balmer component narrower than 2 000 km s$^{-1}$. Of these, 19 turned out to have been spectroscopically misidentified in previous studies; only 64 of the selected objects are genuine NLS1s. We have spectroscopically observed 59 of them and tried to characterize their Narrow and Broad-Line Regions (NLR and BLR) by fitting the emission-lines with Gaussian and/or Lorentzian profiles. In most cases, the broad Balmer components are well fitted by a single Lorentzian profile, confirming previous claims that Lorentzian rather than Gaussian profiles are better suited to reproduce the shape of the NLS1s broad emission lines. This has consequences concerning their FWHMs and line ratios: when the broad Balmer components are fitted with a Lorentzian, most narrow line regions have line ratios typical of Seyfert 2s while, when a Gaussian profile is used for fitting the broad Balmer components, the line ratios are widely scattered in the usual diagnostic diagrams (Veilleux & Osterbrock [CITE]); moreover, the FWHM of the best fitting Lorentzian is systematically smaller than the FWHM of the Gaussian. We find that, in general, the [O III] lines have a relatively narrow Gaussian profile (~200-500 km s$^{-1}$ FWHM) with often, in addition, a second broad (~500-1 800 km s$^{-1}$ FWHM), blueshifted Gaussian component. We do not confirm that the [O III] lines are weak in NLS1s. As previously suggested, there is a continuous transition of all properties between NLS1s and classical Broad-Line Seyfert 1 Galaxies (BLS1s) and the limit of 2000 km s$^{-1}$ used to separate the two species is arbitrary; $R_{4570}$, the ratio of the Fe II to the H$\beta$ fluxes, could be a physically more meaningful parameter to distinguish them.
    Astronomy and Astrophysics 01/2001; · 5.08 Impact Factor

Publication Stats

393 Citations
230.59 Total Impact Points

Institutions

  • 1986–2000
    • Observatoire de Haute-Provence
      Manosque, Provence-Alpes-Côte d'Azur, France
  • 1995–1996
    • The Royal Observatory, Edinburgh
      Edinburgh, Scotland, United Kingdom
  • 1991
    • Universität Basel
      Bâle, Basel-City, Switzerland
  • 1990
    • Space Telescope Science Institute
      Baltimore, Maryland, United States
  • 1981–1984
    • European Southern Observatory
      Arching, Bavaria, Germany