GD 378

Query : GD 378
C.D.S. - SIMBAD4 rel 1.7 - 2021.03.01CET23:09:40

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


Basic data :
GD 378 -- White Dwarf
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:
* (GD,FBS,...), WD* (1969ApJ,EGGR,...), V* (1SWASP), 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] : 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) :
18 23 37.0115357579 +41 04 02.105626146 (Optical) [ 0.0233 0.0246 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] : 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) :
18 22 01.1208659394 +41 02 15.535827696 [ 0.0233 0.0246 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) :
068.8970690657522 +22.3838597824869 [ 0.0233 0.0246 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 :
0.493 138.463 [0.051 0.048 90] A 2018yCat.1345....0G
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):
22.9344 [0.0268] 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:
DBAZ4 C 1993PASP..105..761W
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 (14) :
U 13.246 [0.0019] B 2013AJ....146..131L
B 14.208 [0.0007] B 2013AJ....146..131L
V 14.288 [0.0005] B 2013AJ....146..131L
R 14.324 [0.0016] B 2013AJ....146..131L
G 14.2789 [0.0006] C 2018yCat.1345....0G
I 14.379 [0.0033] B 2013AJ....146..131L
J 14.609 [0.031] C 2003yCat.2246....0C
H 14.664 [0.054] C 2003yCat.2246....0C
K 14.702 [0.097] C 2003yCat.2246....0C
u (AB) 14.011 [0.003] C 2015ApJS..219...12A
g (AB) 14.087 [0.003] C 2015ApJS..219...12A
r (AB) 14.418 [0.003] C 2015ApJS..219...12A
i (AB) 14.662 [0.004] C 2015ApJS..219...12A
z (AB) 14.912 [0.005] C 2015ApJS..219...12A
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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 (16) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

GD 378 GEN# +6.10060378 1SWASP J182337.00+410402.2 uvby98 610060378
EGGR 242 2MASS J18233701+4104018 TIC 288753941 WD 1822+41
FBS 1822+410 SDSS J182337.01+410402.8 UBV M 43081 WD 1822+410
FBS B 170 SDSS J182337.01+410402.9 UCAC4 656-064738 Gaia DR2 2109852523240471936

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References (63 between 1850 and 2021) (Total 63)
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 :

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Collections of Measurements


distance : 1    PM : 3    Fe_H : 1    PLX : 1    MK : 4   

   


External archives :

Data at NED - NASA/IPAC Extragalactic Database : GD 378

Link by name to the catalogue in VizieR :

FBS 1822+410 FBS B 170 2MASS J18233701+4104018 SDSS J182337.01+410402.8 SDSS J182337.01+410402.9
UCAC4 656-064738 uvby98 610060378 WD 1822+41 WD 1822+410 Gaia DR2 2109852523240471936

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Annotations :
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Please, have a look at Best practices. The list of all annotations to SIMBAD objects can be found here .

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2021.03.01-23:09:40

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