Spectral energy distributions of 2xmm selected agn vo tools
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Spectral Energy Distributions of 2XMM-selected AGN & VO-tools. Rodrigo Gil-Merino Instituto de Física de Cantabria (CSIC-UC) Santander, Spain. EURO-VO AIDA supported project. MAVO workshop, ESAC Madrid, Dec. 2008. Background: Preliminary classification from 2XMM selected objects

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Spectral energy distributions of 2xmm selected agn vo tools

Spectral Energy Distributions of 2XMM-selected AGN & VO-tools

Rodrigo Gil-Merino

Instituto de Física de Cantabria (CSIC-UC)

Santander, Spain

EURO-VO AIDA

supported project

MAVO workshop, ESAC

Madrid, Dec. 2008


Spectral energy distributions of 2xmm selected agn vo tools

  • Background: VO-tools

    • Preliminary classification from 2XMM selected objects

    • Extragalactic data base (NED) and the 2XMM catalogue

  • Motivation:

    • Obtain all available photometry for selected objects

    • Build the SEDs from this photometry

    • Multi-wavelength properties of the sample

  • Feasibility:

    • Existing tools related to this proposal

    • Massive queries through VO-compliant catalogues

    • Automatic classification of data


Spectral energy distributions of 2xmm selected agn vo tools

Background VO-tools

The 2XMM catalogue: largest X-ray objects collection:

  • Serendipitous X-ray sources from observations taken between February 2000 and March 2007.

  • Includes ~191000 unique sources, from ~247000 detections, most being AGN.

  • Covers ~1% of the total sky.

NASA Extragalactic Database: largest extragalactic database


Catalogues cross match no vo

2XMM VO-tools

~191.000 objects

+other catalogues

~4700 objects with z

Catalogues cross match (no VO):


Objects according to ned no vo
Objects, according to NED (no VO) VO-tools

types I & II: 1700

AGN

candidates: 500

very heterogeneus data

Galaxies: ~1800

starbursts: 32

problems with AGN clasification

Others

liners: 33

XBONGs: 9


Spectral energy distributions of 2xmm selected agn vo tools

QSOs: ~900 VO-tools

AGN type I: ~300

AGN type II: ~100

Galaxies: ~1800

Secure subsample with VO-tools!

VO explorer: AGN catalogue?

Veron-Cetty & Veron

Topcat

QSO: MB < -23

from NED AGN sample

and

Veron-Cetty & Veron

AGN I : MB > -23

broad lines

AGN II: MB > -23

narrow lines

still from NED


Redshift distributions
Redshift distributions: VO-tools

AGN type I (~300)

QSOs (~900)

AGN type II (~100)

galaxies (~1800)


Lx vs redshift agn
Lx vs. redshift: AGN VO-tools

blue: QSOs (~900)

red: AGN type I (~300)

green: AGN type II (~100)


Lx vs redshift galaxies

AGNs… VO-tools

red: galaxies

blue: VisS (gal)

~1400 with Lx>1e42 erg/s

~ 400 with Lx<1e42 erg/s

Lx vs. redshift: galaxies


Hs distributions agn i ii
HS distributions: AGN I & II VO-tools

HS=(H-S)/(H+S)

H: hard (2-12 keV)

S: soft (0.5-2 keV)

(EPIC-PN only)

AGN type I (~300)

QSOs (~900)

AGN type II (~100)


Hs distributions galaxies vs agn
HS distributions: galaxies vs. AGN VO-tools

HS=(H-S)/(H+S)

H: hard (2-12 keV)

S: soft (0.5-2 keV)

(EPIC-PN only)

all AGNs (~1300)

Galaxies (~1300)


Nh vs lx 2 10kev agns

log (NH) VO-tools

log (LX)

NH vs. Lx(2-10keV): AGNs


Nh vs lx 2 10kev galaxies
NH vs. Lx VO-tools(2-10keV): galaxies


Hs vs log fx fopt agns
HS vs. log(fx/fopt): AGNs VO-tools

QSOs

AGN types I & II

increasing

X-loudness

increasing absorption


Hs vs log fx fopt galaxies
HS vs. log(fx/fopt): galaxies VO-tools

galaxies, Lx>1e42 erg/s

galaxies, Lx<1e42 erg/s


Spectral energy distributions of 2xmm selected agn vo tools

Conclusions VO-tools(so far):

  • 2XMM catalogue useful to re-classify many extragalactic sources

  • ~1300 galaxies show indications of being AGNs, mainly type I

  • Results in a sample of ~3000 X-ray selected AGN

  • VO-tools: “secure sample” & analysis


Spectral energy distributions of 2xmm selected agn vo tools

Motivation VO-tools

  • AGN are multi-wavelength emitters and we need multi-band photometry to well understand them.

  • General emission and absorption mechanisms are well accepted, but not their relative importance

  • This is crucial to establish the general features of each class of AGN and the validity of the general unified scheme.


Spectral energy distributions of 2xmm selected agn vo tools

Spectral Energy Distributions: VO-tools

(Elvis et al. 1994 ApJ 95)


Spectral energy distributions of 2xmm selected agn vo tools

Feasibility VO-tools

EURO-VO proposal:

  • Build the SEDs of ~3000 AGN (restframe)

  • Analyse them and compute the “mean” SEDs in luminosity, redshift and by types

  • Study most extreme cases of outliers in the SEDs sample

  • Use SEDs to re-classify the sample when possible


Spectral energy distributions of 2xmm selected agn vo tools

Requirements from VO-tools: VO-tools

  • VOSED:

    • for each query, can we obtain just one file for the whole SED?

    • can we add catalogues?.... We couldn´t find all (XMM, APM..)

    • can we apply any quality criteria?

  • VO-Spec:

    • can we load any SED as a spectrum? (It works from VOSED)

    • we need to do statistics on large number of spectra, can we?

  • WE NEED a batch system to be able to launch multi-position/object queries (out sample contains ~3000 objects, no way one by one)


Spectral energy distributions of 2xmm selected agn vo tools

Acknowledgements VO-tools

  • EURO-VO AIDA framework: is an excellent opportunity to present a science case with special VO-tools needs.

  • VO people is working really hard to make this possible, doing an excellent job for us.

THANKS !!