VizieR

CfA VizieR . ADAC VizieR . Cambridge (UK) VizieR . IUCAA VizieR . INASAN VizieR .

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VizieR

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phase: 3

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J/A+A/464/211/ta...

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Distance ρ
Position angle θ
Distance (x,y)
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IAU/CDS nomenclature

Mirrors

	J/A+A/464/211	965		Chandra and near-IR obs. of Cyg OB2 (Albacete Colombo+, 2007) ReadMe+ftp 2007A&A...464..211A Similar Catalogs Post annotation
1.	J/A+A/464/211/table3		X-ray source spectroscopy (580 rows) metaJ/A+A/464/211/table3

Simple Constraint List Of Constraints

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Constraint

Explain (UCD)

recno

Record number assigned by the VizieR team. Should Not be used for identification. (meta.record) (RECORD)

[AFM2007]

Sequential number (meta.record) (ID_MAIN)

Counts

Counts Background subtracted counts in the spectra (phot.count;em.X-ray) (PHOT_COUNTS_X)

log(NH)

cm-2

Best fit hydrogen column density (phys.columnDensity;meta.modelled) (PHYS_COLUMN_DENSITY)

e_log(NH)

cm-2

rms uncertainty on log(NH) (stat.error) (ERROR)

keV

⁽ⁿ⁾ Plasma temperature (phys.temperature) (PHYS_TEMP_PLASMA)

e_kT

keV

⁽ⁿ⁾ rms uncertainty on kT (stat.error;phys.energy) (ERROR)

log(EM)

cm-3

Emission measure (phys.emissMeasure) (PHYS_EM-MEASURE)

chi2

reduced chi² value for the spectral fit (stat.fit.chi2) (FIT_CHI2)

dof

Degree of freedom for the spectral fit (stat.fit.dof) (STAT_N-DOF)

ALL cols

⁽ⁿ⁾ indicates a possible blank or NULL column

⁽ⁱ⁾indexed column

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	Display UCD1+ UCD1

http://cdsannotations.u-strasbg.fr/annotations/vizierTable//

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→ Cite/acknowledge VizieR catalogue
→ Rules of usage of VizieR data

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If the access to catalogues with VizieR was helpful for your research work,the following acknowledgment would be appreciated: This research has made use of the VizieR catalogue access tool, CDS, Strasbourg, France (DOI: 10.26093/cds/vizier). The original description of the VizieR service was published in A&AS 143, 23