CDS

23 Tau

Query : 23 Tau

Basic data :
* 23 Tau -- Be Star
Origin of the objects types :

(Ref) Object type as listed in the reference "Ref"
(acronym) Object type linked to the acronym according to the original reference
() Anterior to 2007, before we can link the objet type to a reference, or given by the CDS team in some particular cases

Other object types: 		* (*,AG,...), ** (**,BDS,...), X (CXOP,2E,...), V* (NSV,V*,...), IR (IRAS,[DML87],...), UV (CEL,TD1), bC* (2003AstL), Be* (1982IAUS), Em* (EM*), PM* (2018yCat), NIR (2MASS)
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
ICRS coord. (ep=J2000) : 		03 46 19.5738428 +23 56 54.081244 (Optical) [ 0.35 0.18 90 ] A 2007A&A...474..653V
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
FK4 coord. (ep=B1950 eq=1950) : 		03 43 21.1810129 +23 47 38.911411 [ 0.35 0.18 90 ]
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
Gal coord. (ep=J2000) : 		166.5699266147 -23.7491919723 [ 0.35 0.18 90 ]
Syntax of proper motions is : "pm-ra pm-dec [error ellipse] quality bibcode"
  • pm-ra : mu-ra*cos(dec) (expressed in the ICRS system in mas/yr)
  • pm-dec : mu-dec (expressed in the ICRS system in mas/yr)
  • [error ellipse] : error major axis and minor axis (in mas), orientation angle (in deg)
  • quality : flag of quality (A=best quality -> E=worst quality, {� } =unknown quality)
  • bibcode : bibcode of the proper motion reference
Proper motions mas/yr : 		21.13 -43.65 [0.35 0.27 90] A 2007A&A...474..653V
Syntax of radial velocity (or/and redshift) is : "value [error] (wavelength) quality bibcode"
  • value : radial velocity or/and redshift (Heliocentric frame) according to your Output Options
    (redshift may be not displayed if the data value is <0 and the database inside value is a radial velocity)
  • [error] : error of the corresponding value displayed before
  • (wavelength) : wavelength range of the measurement : Rad, mm, IR, Opt, UV, Xray, Gam or  '∼'(unknown)
  • quality : flag of quality ( A=best quality -> E=worst quality, {� } =unknown quality)
  • bibcode : bibcode of the value's origin
Radial velocity / Redshift / cz : 		V(km/s) 6.2 [2] / z(~) 0.000021 [0.000007] / cz 6.20 [2.00]
   E 1953GCRV..C......0W
Syntax of parallax is : 'value quality [error] bibcode'
  • value : parallax value
  • quality : flag of quality (A=best quality -> E=worst quality, {� } =unknown quality)
  • [error] : mean error
  • bibcode : bibcode of the parallax reference
Parallaxes (mas): 		8.58 [0.37] A 2007A&A...474..653V
Spectral type is made of 3 parts: %coding is composed of 4 parts :
  • the spectral type, which is made of a temperature class, eventually a luminosity class (roman number) and/or spectral peculiarities;
  • a quality letter: A=best quality→E=worst quality, {� } =unknown quality %
  • a quality letter: A=best quality -> E=worst quality, {� } =unknown quality
  • bibcode : bibcode of the spectral type reference
Spectral type: 		B6IV(e) C 1982ApJS...50...55S
Syntax of fluxes (or magnitudes) is : "filter-name (System) flux-value [error] quality MultVarFlags bibcode"
  • filter-name : U, B, V, R, I, G, J, H, K, u, g, r, i, z
  • (System) : may be AB (default is Vega)
  • flux-value : value of flux or magnitude
  • [error] : error value
  • quality : flag of quality of the flux value ( A=best quality -> E=worst quality, {� } =unknown quality)
  • MultVarFlags : Mult is zero or one char (J) for joined photometry ; Var can be zero or two chars (V[0-4])
  • bibcode : bibcode of the flux reference
Fluxes (8) :
U 3.70 [~] C 2002yCat.2237....0D
B 4.12 [~] C 2002yCat.2237....0D
V 4.18 [~] C 2002yCat.2237....0D
G 4.0908 [0.0041] C 2018yCat.1345....0G
I 4.16 [~] D 2007ApJS..172..663S
J 4.20 [~] C 2002yCat.2237....0D
H 4.22 [~] C 2002yCat.2237....0D
K 4.220 [0.016] C 2003yCat.2246....0C
SIMBAD within arcmin
', {sourceSize:12, color:'#30a090'})); aladin.on('objectClicked', function(object) { var objName=object.data.MAIN_ID; aladin.showPopup(object.ra,object.dec,'',''+ objName+''); });" title="Show Simbad objects"> Overlay Simbad points in this preview
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sedIcon
within arcsec The VizieR photometry tool allows for easy visualization of photometry points extracted around the Simbad position from photometry-enabled catalogues in VizieR.
The search radius has to be specified by the user. It is currently limited to a maximum of 30 arcsec. It depends mostly on the precision or quality of the coordinates (SIMBAD and VizieR catalogs), the resolution of the images from which the sources were extracted, source extent, and source crowding.
Suggestions are: crowded field: 0.5 to 1.5 arcsec, 3 arcsec otherwise; uncertain coordinates (SIMBAD quality E or coordinates without reference): 5 to 30 arsec (risky!). sed-help-icon
Some important notes on this object about identifications and objects associations.
notes:

  • also RfN VDB 22

Hierarchy : number of linked objects
whatever the membership probability is (see description here ) :

: 1 : 5737 Display criteria :

The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (67) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

* 23 Tau CXOP J034619.5+235653 NAME Merope V* V971 Tau
** DRS 4 DANCe J03461957+2356541 NSV 1287 VDB 22
** HL 15A 2E 862 PMC 90-93 5602 WDS J03463+2357A
AG+23 309 2E 0343.3+2347 PPM 92859 WDS J03463+2357Aa,Ab
ALS 15828 EM* MWC 73 RAVE J034619.6+235654 WEB 3354
BD+23 522 EPIC 200007770 ROT 3764 [B10] 865
BDS 1858 A GC 4512 1RXS J034620.7+235713 [DML87] 101
CCDM J03463+2357A GCRV 2108 SAO 76172 [JE82] 123
CCDM J03463+2357AB GEN# +5.20220980 SKY# 5737 [KRL2001] 51
CEL 331 GSC 01800-02204 TD1 2500 [KSP2003] G166.5697-23.7490
Cl* Melotte 22 K 31 HD 23480 TIC 61139113 [KSP2003] J034619.56+235654.6
Cl* Melotte 22 MSK 88 HIC 17608 TYC 1800-2204-1 [SCG94] X 123
Cl* Melotte 22 TRU 286 HIP 17608 UBV 3607 [SCG94] O 116
Cl* Melotte 22 WCZ 140 HR 1156 UBV M 41050 [TSA98] J034619.10+235648.43
Cl* Melotte 22 HII 980 IDS 03404+2338 A UCAC3 228-18525 AAVSO 0340+23
Cl Melotte 22 980 IRAS 03433+2347 USNO-A2.0 1125-01259575 Gaia DR2 65205373151673344
CSI+23 522 1 2MASS J03461958+2356541 uvby98 520220980

References (431 between 1850 and 2024) (Total 431)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
Follow new references on this object
                Reference summaries :

                from: to:

                 or select by : (not exhaustive, explanation here)

Collections of Measurements


velocities : 11    V* : 1    distance : 1    ROT : 3    Fe_H : 3    PLX : 4    PM : 4    MK : 14   

   

Observing logs


IUE : 32   

   

External archives :

Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Data at NED - NASA/IPAC Extragalactic Database : 23 Tau

Link by name to the catalogue in VizieR :

AG+23 309 ALS 15828 BD+23 522 CCDM J03463+2357A CCDM J03463+2357AB
CEL 331 2E 862 GSC 01800-02204 HD 23480 HIC 17608
HIP 17608 HR 1156 IRAS 03433+2347 2MASS J03461958+2356541 NSV 1287
PPM 92859 RAVE J034619.6+235654 1RXS J034620.7+235713 SAO 76172 TD1 2500
TYC 1800-2204-1 UCAC3 228-18525 USNO-A2.0 1125-01259575 uvby98 520220980 V* V971 Tau
VDB 22 WDS J03463+2357A WDS J03463+2357Aa,Ab [DML87] 101 Gaia DR2 65205373151673344

Search by coordinates in Vizier (radius: 5 arcsec)

Indications mainly about references on other documents
Notes (1) :

Annotations :
Annotations allow a user to add a note or report an error concerning the astronomical object and its data. It requires registration to post a note. See description .
Please, have a look at Best practices. The list of all annotations to SIMBAD objects can be found here .

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2023.11.29-05:56:04

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