DG Canum Venaticorum

Query : DG Canum Venaticorum
C.D.S. - SIMBAD4 rel 1.7 - 2018.10.21CEST20:12:30

Available data : Basic data  •  Identifiers  •  Plot & images  •  Bibliography  •  Measurements  •  External archives  •  Notes  •  Annotations


Basic data :
V* DG CVn -- Flare 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:
* (Ref,ASCC,...), PM* (Ref,G,...), X (Ref,RBS,...), Fl* (Ref,[GKL99]), V* (V*,1SWASP), UV (Ref,GALEX), ** (WDS), Rad (FIRST), IR (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] : coordinates error major axis, minor axis (in mas at defined epoch and convolved with error on propermotion),
    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) :
13 31 46.6246175093 +29 16 36.681048898 (Optical) [ 0.2708 0.1977 90 ] A 2018yCat.1345....0G
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] : coordinates error major axis, minor axis (in mas at defined epoch and convolved with error on propermotion),
    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) :
13 29 28.2952238021 +29 32 08.885478175 [ 26.2015 15.5513 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] : coordinates error major axis, minor axis (in mas at defined epoch and convolved with error on propermotion),
    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) :
048.8762933498456 +80.8598629515557 [ 0.2708 0.1977 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 :
-242.834 -149.762 [0.524 0.311 90] A 2018yCat.1345....0G
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) -7 [4] / z(~) -0.000023 [0.000013] / cz -7.00 [4.00]
   (Opt) C 2014AJ....147...20N
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):
54.6875 [0.3313] A 2018yCat.1345....0G
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:
M4Ve C 1986AJ.....92..139S
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 (13) :
B 12.90 [0.27] D 2000A&A...355L..27H
V 12.02 [0.09] C 2014AJ....147...85R
R 10.77 [0.05] C 2014AJ....147...85R
I 9.15 [0.07] C 2014AJ....147...85R
G 10.6074 [0.0007] C 2018yCat.1345....0G
J 7.561 [0.024] C 2003yCat.2246....0C
H 7.002 [0.023] C 2003yCat.2246....0C
K 6.720 [0.018] C 2003yCat.2246....0C
u (AB) 15.701 [0.007] C 2009yCat.2294....0A
g (AB) 15.990 [0.014] D 2009yCat.2294....0A
r (AB) 14.437 [0.008] C 2009yCat.2294....0A
i (AB) 12.725 [0.008] C 2009yCat.2294....0A
z (AB) 10.230 [0.001] C 2009yCat.2294....0A
SIMBAD with radius arcmin
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within radius 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!).

The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (32) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

V* DG CVn GSC 02003-00139 RX J1331.8+2916 UCAC4 597-049666
ASCC 686757 LP 323-158 RX J1331.7+2916 USNO-B1.0 1192-00212017
BPS BS 16078-0011 LSPM J1331+2916 1RXS J133146.9+291631 WDS J13318+2917A
FIRST J133146.7+291637 2MASS J13314666+2916368 SDSS J133146.51+291636.1 2XMM J133146.4+291635
GALEX 6379324891286471537 NLTT 34386 StKM 2-951 [GKL99] 280
G 165-8 8pc 126.00 1SWASP J133146.61+291636.6 [RHG95] 2128
G 165-8B PM J13317+2916 TYC 2003-139-1 [ZEH2003] RX J1331.7+2916 1
GJ 3789 RBS 1280 UCAC2 42065975 Gaia DR2 1450067137649449728

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References (83 between 1850 and 2018) (Total 83)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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                Reference summaries :

                from: to:

                 or select by : (not exhaustive, explanation here)


Collections of Measurements


distance : 3    velocities : 3    PM : 3    Fe_H : 5    PLX : 1    MK : 4    V* : 1   

   

Observing logs


ISO : 1   

   


External archives :

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

Data at NED - NASA/IPAC Extragalactic Database : DG Canum Venaticorum

Link by name to the catalogue in VizieR :

V* DG CVn FIRST J133146.7+291637 G 165-8 G 165-8B GJ 3789
GSC 02003-00139 LSPM J1331+2916 2MASS J13314666+2916368 NLTT 34386 1RXS J133146.9+291631
SDSS J133146.51+291636.1 TYC 2003-139-1 UCAC2 42065975 UCAC4 597-049666 USNO-B1.0 1192-00212017
WDS J13318+2917A [GKL99] 280 Gaia DR2 1450067137649449728

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2018.10.21-20:12:30

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