CHARM2: an updated Catalog of High Angular Resolution Measurements A. Richichi, I. Percheron, M. Khristoforova ADC_Keywords: Stars, diameters ; Interferometry Keywords: Techniques: high angular resolution -- Techniques: interferometric -- Catalogs -- Occultations -- Stars: binaries: general -- Stars: fundamental parameters Abstract: We present an update of the Catalog of High Angular Resolution Measurements (CHARM, Richichi & Percheron 2002), which includes results available until July 2004. CHARM2 is a compilation of direct measurements by high angular resolution methods, as well as indirect estimates of stellar diameters. Its main goal is to provide a reference list of sources which can be used for calibration and verification observations with long-baseline optical and near-IR interferometers. Single and binary stars are included, as are complex objects from circumstellar shells to extragalactic sources. The present update provides an increase of almost a factor of two over the previous edition. Additionally, it includes several corrections and improvements, as well as a cross-check with the valuable public release observations of the ESO Very Large Telescope Interferometer (VLTI). A total of 8231 entries for 3238 unique sources are now present in CHARM2. This represents an increase of a factor of 3.4 and 2.0, respectively, over the contents of the previous version of CHARM. Description of file: charm2.csv ------------------------------------------------------------------------ Units Label Explanations ------------------------------------------------------------------------ --- N *Sequential order in the table --- Source *Name of the source --- VLTI *?Presence of VLTI observations --- Type *Type of source --- Id1 Cross-identification --- Id2 ?Cross-identification --- Id3 ?Cross-identification --- Id4 ?Cross-identification --- Method *Method of observation --- Lambda *?Wavelength of observation mas UD *?Uniform disk angular diameter mas e_UD ?Mean error on UD mas UL_UD *?Upper limit for Uniform disk diameter mas LD *?Limb-darkened angular diameter mas e_LD ?Mean error on LD mas Shell *?Circumstellar shell mas sep *?Binary: separation deg PA *?Binary: position angle --- Ratio *?Binary: Brightness ratio --- BinType *?Binary: type --- Com ?Comments extracted from the reference or inserted by the catalogue compiler h.mmsss RA *Right Ascension J2000 -d.mmsss Decl *Declination J2000 arcsec/yr pmRA Proper motion in right ascension arcsec/yr pmDE Proper motion in declination mag Bmag *?B magnitude mag Vmag *?V magnitude mag Kmag *?K magnitude (2.2um) --- f_Kmag *?Code for Kmag Jy 12um *?Flux at 12um --- f_12um *?Code for 12um flux --- SpType *?MK Spectral class --- Var *?Variability note mas Plx *?Parallax km/s RV *?Radial velocity --- ref(1) References, in refs.dat file --- ref(2) ?References, in refs.dat file --- ref(3) ?References, in refs.dat file --- ref(4) ?References, in refs.dat file ------------------------------------------------------------------------ Note on N: is an index fixed at the time of release. Note on Source: The name is chosen arbitrarily, although care has been taken to use the designation of the original paper from which the source was extracted (lowercase, stripped of ± and special symbols). Note on VLTI: A flag "Y" means that the source has been observed by the VLTI and the data are public. Note on Type: A short abbreviation to identify the type of the source: UR Unresolved (upper limit may be given) Diam Stellar diameter resolved Bin Binary or multiple star Com Complex sources, e.g. shell, binary + diameter, etc. Cal Calibrator Note on Method: This code identifies the method of observation used, as: LO Lunar Occultation LBI Long-Baseline Interferometry SPE Speckle Interferometry (all methods) Radio Radio Measurements (incl. mm,, sub-mm) EST Estimated diameter AM Aperture Masking FGS HST Fine Guidance Sensors IND Indirect Methods (Spectrophotometry) For the update in CHARM2, only LO, LBI, IND were added. Note on Lambda: The wavelength appears if given in the paper. This is listed in different ways, depending on the type of measurement: - one or two numbers, in which case it means {lambda) (and width) in µm; - a filter type. The usual standard photometric names apply (for instance: V, K, N) - a symbol, for special or narrow filters. Examples can be: CVF (Circular Variable Filter, i.e. a narrow bandwidth filter used in the near-IR), H?, Br?. - "mult" indicates that the observations has been carried out at multiple wavelengths simultaneously. New additions in CHARM2 are restricted to the visual and near Infrared Note on UD, UL_UD: Uniform disk angular diameter, if available, as reported in the paper. The entries for the angular diameter and the upper limit should be mutually exclusive, and the error is not always given. Note on LD: Limb-darkened angular diameter, if available, as reported in the paper. Note on Shell: Marks the presence of a circumstellar shell, either as a flag "Y", or with a characteristic size in mas. Note on Sep: This, and the next four fields, refer to binary or multiple stars. Separation in mas, as reported in the reference. For LO measurements, this is often only the projected separation along the occultation PA. In case of multiplicity (triple and higher), only one entry is reported, without a specific rule. In general, the result listed is the one which constituted the specific contribution of the corresponding reference. Note on PA: This can be the true position angle, or the angle of the projection in case of 1- D measurements such as is in general the case for LO. In case of a multiple star, only one entry is present and the same considerations apply as for sep. Note on Ratio: Brightness ratio (brighter to fainter), at the observation wavelength as reported in lambda and/or in the corresponding reference. In case of a multiple star, only one entry is present and the same considerations apply as for sep. Note on BinType: The type of binary. Codes are: D (double), T (triple), Q (quadruple), M (multiple, i.e. triple or higher), ND (not detected, in case of a source reported as binary or multiple in the literature). S indicates a single star (the binary star is disclaimed, typically due to poor observations), SP a spectroscopic binary. D? indicates that the binary is doubtful. A missing Type entry implicitly indicates a double star. Note on RA, Decl: These are J2000 coordinates. For RA, the integer is the hours, the first two digits of the fractional part are the minutes, and the following digits the seconds. For example, 4.512246 indicates 4 hours, 51 minutes and 22.46 seconds. The format for Decl is similar, with the possible presence of a minus sign for negative declinations. Note on Bmag, Vmag, SpType, Var, Plx, RV: mostly extracted from the Simbad data-base Note on Kmag, f_Kmag: The Kmag have been revised and are extracted from : d: J/A+A/413/1037 (J-K DENIS photometry of bright southern stars (Kimeswenger+ 2004)), m: 2MASS, b: J/A+A/393/183 (Catalogue of calibrator stars for LBSI (Borde+, 2002)), c: CHARM. Note on 12um, f_12um: The 12um fluxes are extracted from: m: MSX catalog, none: IRAS-PSC.