J/A+A/386/492 Catalog of High Angular Resolution Measurements (Richichi, 2002)
CHARM: A Catalog of High Angular Resolution Measurements.
Richichi A., Percheron I.
<Astron. Astrophys. 386, 492 (2002)>
=2002A&A...386..492R 2002A&A...386..492R (SIMBAD/NED BibCode)
ADC_Keywords: Stars, diameters ; Interferometry
Keywords: techniques: high angular resolution - techniques: interferometric -
catalogs - occultations - stars: binaries: general -
stars: fundamental parameters
Abstract:
The Catalog of High Angular Resolution Measurements (CHARM) includes
most of the measurements obtained by the techniques of lunar
occultations and long-baseline interferometry at visual and infrared
wavelengths, which have appeared in the literature or have otherwise
been made public until mid-2001. A total of 2432 measurements of 1625
sources are included, along with extensive auxiliary information. In
particular, visual and infrared photometry is included for almost all
the sources. This has been partly extracted from currently available
catalogs, and partly obtained specifically for CHARM. The main aim is
to provide a compilation of sources which could be used as calibrators
or for science verification purposes by the new generation of large
ground-based facilities such as the ESO Very Large Interferometer and
the Keck Interferometer.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
charm.dat 424 3248 A Catalogue of High Angular Resolution Measurements
refs.dat 267 195 References
data/* . 1888 Auxiliary data
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See also:
J/A+A/431/773 : CHARM2, an updated of CHARM catalog (Richichi+, 2005)
II/224 : Catalogue of Stellar Diameters (CADARS) (Pasinetti-Fracassini+ 2001)
http://www.eso.org/~arichich/download/charm/ : CHARM home page
Byte-by-byte Description of file: charm.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- N Sequential order in the table
6- 9 I4 --- Ser *Serial order in the table
11- 27 A17 --- FileName *Link to the source data in "data" subdir.
29- 31 I3 --- VLTI *Number of VLTI observations
33- 36 A4 --- Type *Type of source
38- 56 A19 --- Id Name of the source
58- 81 A24 --- Id2 Cross-identification
83-108 A26 --- Id3 Cross-identification
110-133 A24 --- Id4 Cross-identification
135-139 A5 --- Inst *Method of observation
141-146 A6 --- Lambda *Wavelength of observation
148-153 F6.2 mas UD *? Uniform disk angular diameter
155-159 F5.2 mas e_UD ? Mean error on UD
161-166 F6.2 mas maxUD ? *Upper limit for Uniform disk diameter
168-173 F6.2 mas LD *? Limb-darkened angular diameter
175-178 F4.2 mas e_LD ? Mean error on LD
180-183 A4 --- Shell *Presence of a circumstellar shell
185-191 F7.2 mas sep *? Binary: separation
193-195 I3 deg PA *? Binary: position angle
197-201 A5 --- R *? Binary: Brightness ratio
203-204 A2 --- Bin *? Binary: type
206-207 A2 --- necDiam [BVK] In case of missing diameter,
indicates the missing argument
208-214 F7.2 mas cDiam *? Computed diameter
216-217 A2 --- n_cDiam [BVK] In case of missing diameter,
indicates the missing argument
219-224 F6.2 mas e_cDiam ? Mean error on cDiam
226-227 A2 --- Met *Method of computation of angular diameter
229-264 A36 --- Com Comments extracted from the reference or
inserted by the catalogue compiler
266-267 I2 h RAh Right Ascension J2000 (hours)
268-269 I2 min RAm Right Ascension J2000 (minutes)
270-275 F6.3 s RAs Right Ascension J2000 (seconds)
277 A1 --- DE- Declination J2000 (sign)
278-279 I2 deg DEd Declination J2000 (degrees)
280-281 I2 arcmin DEm Declination J2000 (minutes)
282-286 F5.2 arcsec DEs Declination J2000 (seconds)
288-295 F8.5 arcsec/yr pmRA ? Proper motion in right ascension
297-304 F8.5 arcsec/yr pmDE ? Proper motion in declination
306-311 F6.1 yr --- [2000.0] Epoch of position
313-317 F5.2 mag Bmag *? B magnitude
319 A1 --- f_Bmag Code for Bmag (none used)
321-325 F5.2 mag Vmag *? V magnitude
327 A1 --- f_Vmag Code for Vmag (none used)
329-333 F5.2 mag Kmag ? K magnitude (2.2um)
335 A1 --- f_Kmag Code for Kmag (none used)
337 A1 --- Kc Correlated K magnitude
339-351 A13 --- SpType *MK Spectral class
353-359 A7 --- Var *Variability note
361-366 F6.2 mas Plx *? Parallax
368-373 F6.1 km/s RV *? Radial velocity
375-385 A11 --- ref(1) References, in refs.dat file
387-401 A15 --- ref(2) References, in refs.dat file
403-413 A11 --- ref(3) References, in refs.dat file
415-424 A10 --- ref(4) References, in refs.dat file
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Note on Ser:
is is an index fixed at the time of release.
Note on FileName:
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:
The catalogue is generated with this number set to zero for all
sources. It is expected that the corresponding entries will
progressively increase as observations are carried out.
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
C1 Calibrator - high quality
C2 Calibrator - medium quality
C3 Calibrator - low quality
Cat Catalogue
VP VLTI Project
These are the types introduced with the first release of the catalogue,
but additional codes may be introduced since this is an arbitrary
field. The calibrator codes (C1...C3) refer to sources which have a
well-determined angular diameter, and no known variability. Some of
the sources in the other classes can be used as calibrators too,
depending on the specific application under consideration.
Note on Inst:
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)
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), Hα, Brγ.
- "mult" indicates that the observations has been carried out at
multiple wavelengths simultaneously.
Note on UD, maxUD:
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:
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 R:
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 Bin:
The type of binary. At the time of the initial release of the
catalogue, the codes used 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), while B? indicated that the binary is doubtful. A
missing Typ entry implicitly indicates a double star.
Note on cDiam:
Angular diameter and its error, computed on the basis of a formula as
described in Method. An error is included whenever possible.
Note on Met:
A formula which combines different entries in the catalogue, to yield
a theoretical angular diameter and possibly its associated error. The
methods currently included are:
BV: Bartholdi (thesis, 1976) relationship based on (B-V) and V.
Well-suited for main sequence stars hotter than K.
VB: Van Belle (priv. comm. 2000) relationship based on (V-K) and
luminosity class. The apparent angular sizes versus V-K color are
estimated in the case of :
- Main Sequence stars with a V-K from -0.5 to 0.5
- Giant and Super Giant with a V-K from 2.0 to 8.0
- Evolved Sources : Variable stars with V-K from 5.5 to 13.0
Well suited for cool main sequence stars, late-type giant stars,
AGB stars.
For what concern the errors, we have assumed a fixed error on B, V, K
photometry, which has been arbitrarily set to 0.1mag. This assumption
is, in many cases, not very realistic and the derived errors must be
taken with caution.
Note on Bmag, Vmag, SpType, Var, Plx, RV:
mostly extracted from the Simbad data-base
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1- 15 A15 --- Ref Reference code
17- 35 A19 --- BibCode BibCode
37- 62 A26 --- Aut Author's name
64-267 A204 --- Com Comments
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Acknowledgements: Andrea Richichi
(End) Francois Ochsenbein, Patricia Bauer [CDS] 16-May-2002